Non-destructive testing apparatus for valves

Abstract

This invention relates to the field of valve testing technology, specifically to a non-destructive testing (NDT) device for valves. The NDT device includes a base with multiple supports and a testing head. The supports support a three-way valve; the testing head seals the common valve port and tests the airtightness of the three-way valve; each support has a pair of clamping seats on both sides, which can elastically slide along the arrangement direction of the supports; each clamping seat has a through hole and a first sealing element, the through hole communicating with the common valve port, and the first sealing element sealing the common valve port; both clamping seats in the same pair are hinged to a switching part, adjacent switching parts can rotate synchronously in opposite directions; each switching part has a gas flow path and three sealing elements, two of which are used to block the through hole, and the third sealing element is used to seal the through hole. The gas flow path passes through the sealing element used to seal the through hole and communicates with the through hole. This allows for the simultaneous testing of multiple valves, improving testing efficiency.

Description

Technical Field

[0001] This invention relates to the field of valve testing technology, and in particular to a non-destructive testing device for valves. Background Technology

[0002] Valves are the core fluid control components of the thermal management system of electric vehicles. They directly affect battery performance, power system efficiency and overall vehicle energy consumption by precisely regulating the flow direction and flow rate of fluids such as coolant and refrigerant.

[0003] After valve production, airtightness testing is required, necessitating the use of testing equipment. Related technologies include Chinese patent CN218444318U, which discloses an airtightness testing fixture for a three-way valve. This fixture includes a base, a clamp, and a transfer mechanism. A water storage tank is mounted on the frame. The clamp supports the three-way valve and seals its three inlets and outlets. The transfer mechanism pushes the clamp, along with the three-way valve, into the water storage tank to perform an airtightness test on the three-way valve.

[0004] However, with the acceleration of industrialization, the production scale of valves is expanding day by day, and the requirements for testing efficiency are constantly increasing. The above-mentioned three-way valve air tightness testing fixture can only test one three-way valve at a time. This single testing mode is difficult to meet the testing needs of large-scale production. Summary of the Invention

[0005] Therefore, it is necessary to provide a non-destructive testing device for valves to address the problem of low testing efficiency in the current valve testing process.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A non-destructive testing (NDT) device for valves is configured to perform airtightness testing on a three-way valve, which has a common valve port and two universal valve ports. The NDT device includes a base with several supports arranged side-by-side on it. These supports are slidable along their own arrangement direction and are configured to support the three-way valve. Several testing heads are also arranged side-by-side on the base. All testing heads are slidable synchronously along a direction perpendicular to the supports and are configured to seal the common valve port and test the airtightness of the three-way valve. Each support has a pair of clamping seats on both sides, with different pairs of clamping seats arranged along the support's arrangement direction. The clamping seats are elastically slidable along the support's arrangement direction. The clamping base is provided with a through hole and a first sealing element. The through hole is connected to a universal valve port, and the first sealing element is configured to seal the universal valve port. Both clamping bases in the same pair are hinged together with a switching part, and adjacent switching parts can rotate synchronously in opposite directions. Each switching part is provided with a second sealing element, a third sealing element, and a fourth sealing element in sequence along the circumference. The second sealing element, the third sealing element, and the fourth sealing element all form a stepped structure with the switching part. The second sealing element and the third sealing element are configured to block the through hole, and the fourth sealing element is configured to seal the through hole. Each switching part is provided with a gas flow path, which passes through the fourth sealing element and is connected to the through hole. It is configured to receive gas from the outside.

[0008] Furthermore, the thickness of the fourth seal is greater than both the thickness of the second seal and the thickness of the third seal.

[0009] Furthermore, the odd-numbered switching sections are connected to a first control lever, which extends in a direction parallel to the arrangement of the supports; the even-numbered switching sections are connected to a second control lever, which extends in a direction parallel to the arrangement of the supports; the first and second control levers are connected by a synchronization assembly, and under the action of the synchronization assembly, the first and second control levers can synchronously drive adjacent switching sections to rotate in opposite directions.

[0010] Furthermore, the synchronization assembly includes a first rack, a second rack, and two rotating shafts. A first rack is fixedly mounted on both ends of the first control lever, and the first rack has an arc-shaped structure. A second rack is fixedly mounted on both ends of the second control lever, and the second rack also has an arc-shaped structure. The rotating shafts are mounted on the base and can rotate around their own axes. The two rotating shafts are arranged at intervals along the arrangement direction of the support. Each rotating shaft has two first gears fixedly fitted onto it. The two first gears on the same rotating shaft mesh with the first rack and second rack on the same side, respectively, in an internal meshing form and an external meshing form.

[0011] Furthermore, each three-way valve has a valve core and an adjusting wrench. The adjusting wrench is configured to drive the valve core to rotate, thereby adjusting the connection between the common valve port and one of the general-purpose valve ports. The base is also equipped with a third rack and several rotating wheels. The third rack extends in a direction parallel to the arrangement of the supports and can slide in the same direction. The several rotating wheels are spaced apart in a direction parallel to the arrangement of the supports and are corresponding to the three-way valves. The rotating wheels can rotate around their own axes. Each rotating wheel is fixed and coaxially equipped with a second gear, which meshes with the third rack. Each rotating wheel is eccentrically equipped with a stop bar, which can form a stop with the adjusting wrench. One of the switching parts is connected to the third rack through a transmission assembly. Under the action of the transmission assembly, the rotation of the switching part can drive the third rack to slide.

[0012] Furthermore, the transmission assembly includes a fourth rack, a fifth rack, and a connecting rod. The fourth rack is mounted on the base and extends in a direction perpendicular to the arrangement of the supports, and is capable of sliding in the same direction. The fifth rack is mounted on the switching part and has an arc-shaped structure, and meshes with the fourth rack. The connecting rod is hinged between the third rack and the fourth rack.

[0013] Furthermore, a sliding seat is also provided on the base, which can slide in a direction perpendicular to the arrangement of the supports; all the detection heads are arranged side by side on the sliding seat.

[0014] Furthermore, a first slide rail is fixedly installed on the base, extending in a direction perpendicular to the arrangement of the supports; the sliding seat is slidably sleeved on the first slide rail.

[0015] Furthermore, a drive unit is also provided on the base, which is configured to provide a driving force for the sliding seat to slide.

[0016] Furthermore, a second slide rail is provided on the sliding seat, and the second slide rail extends in a direction parallel to the arrangement of the supports; the detection head is slidably sleeved on the second slide rail.

[0017] The beneficial effects of this invention are:

[0018] This invention relates to a non-destructive testing device for valves. By setting up several supports, several test heads, several pairs of clamps, and several switching parts, it can test multiple three-way valves at the same time, thereby improving testing efficiency. When the switching part rotates, it can switch to a universal valve port connected to the gas flow path, so that the airtightness of the two flow paths of the three-way valve can be tested without changing the valve position. The operation is simple.

[0019] Furthermore, by setting the thickness of the fourth seal to be greater than both the thickness of the second and third seals, when the switching unit rotates to the position where the fourth seal aligns with the through hole, the distance between the two clamping seats in the same pair becomes greater. This not only improves the sealing effect of the fourth seal on the through hole but also improves the sealing effect of the first seal on the through hole, thereby reducing the impact on the airtightness test results of the three-way valve. Attached Figure Description

[0020] Figure 1 The working state of the non-destructive testing equipment for valves provided in this embodiment of the invention when testing the airtightness of a three-way valve. Figure 1 ;

[0021] Figure 2 This is an exploded view of the parts of a valve tested using a non-destructive testing device provided in an embodiment of the present invention when testing the airtightness of a three-way valve.

[0022] Figure 3 A top view of the non-destructive testing equipment for valves provided in this embodiment of the invention when testing the airtightness of a three-way valve;

[0023] Figure 4 for Figure 3 Sectional view along the AA direction;

[0024] Figure 5 A front view schematic diagram of the non-destructive testing equipment for valves provided in this embodiment of the invention when testing the airtightness of a three-way valve;

[0025] Figure 6 for Figure 5 Sectional view along the BB direction;

[0026] Figure 7 A three-dimensional structural diagram of the switching part and the fifth rack of the valve non-destructive testing equipment provided in the embodiment of the present invention during assembly;

[0027] Figure 8 for Figure 7 Cross-sectional view along the CC direction;

[0028] Figure 9 for Figure 7 DD-direction cross-sectional view;

[0029] Figure 10 The working state of the non-destructive testing equipment for valves provided in this embodiment of the invention when testing the airtightness of a three-way valve. Figure 2 ;

[0030] Figure 11 The working state of the non-destructive testing equipment for valves provided in this embodiment of the invention when testing the airtightness of a three-way valve. Figure 3 .

[0031] in:

[0032] 1. Base; 101. Mounting base; 1011. Fixing block; 1012. Support rod; 1013. Third slide groove; 102. Support arch; 103. Support block; 104. Support bar; 2. Support; 3. Detection head; 4. Clamping seat; 401. Through hole; 5. First seal; 6. Switching part; 601. Gas flow path; 602. Hinge rod; 603. Insert rod; 7. Second seal; 8. Third seal; 9. Fourth seal; 10. First control rod; 1001. First connecting sleeve; 11. Third... Two control levers; 1101, second connecting sleeve; 1201, first rack; 1202, second rack; 1203, rotating shaft; 1204, first gear; 13, third rack; 14, fourth rack; 15, rotating wheel; 1501, stop lever; 16, second gear; 17, connecting rod; 18, fifth rack; 19, sliding seat; 20, first slide rail; 21, drive cylinder; 22, second slide rail; 23, three-way valve; 2301, common valve port; 2302, universal valve port; 2303, adjusting wrench. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0034] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage," unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] The following reference Figures 1 to 11 The present invention describes a non-destructive testing device for valves provided in the embodiments of the present invention, which is particularly suitable for airtightness testing of a three-way valve 23; the valve body of the three-way valve 23 is a T-shaped tubular structure, and has a common valve port 2301 and two general-purpose valve ports 2302, which are arranged opposite to each other.

[0037] In the current valve testing field, the existing airtightness testing equipment for three-way valves 23 can only test one three-way valve 23 at a time. This single testing mode is difficult to meet the testing needs of large-scale production. Especially during the peak production period of three-way valves 23, a large number of three-way valves 23 are backed up waiting for testing, which not only prolongs the product delivery cycle, but also increases the company's warehousing and management costs. At the same time, due to the low utilization rate of the airtightness testing equipment for three-way valves 23, the cost amortization of the company's equipment investment is high, which further compresses the company's profit margin and seriously restricts the improvement of production efficiency and the company's economic benefits.

[0038] Based on this, the non-destructive testing equipment for valves provided in this embodiment of the invention includes a base 1; a mounting base 101 is fixedly installed on the top of the base 1, the mounting base 101 is a strip structure and extends horizontally in the left and right directions; a plurality of supports 2 are provided on the top of the mounting base 101, the plurality of supports 2 are arranged along the extending direction of the mounting base 101, the supports 2 are box structures, and the upper end face and the front side wall are open, and grooves are provided on the top of the supports 2 and on three sides, the grooves are U-shaped structures, and the valve body of the three-way valve 23 is... During installation, it is inserted into three grooves simultaneously, with the common valve port 2301 facing rearward, so that it can be supported by the support 2; a sliding seat 19 is also provided on the top of the base 1. The sliding seat 19 is located on the rear side of the mounting base 101, and is a strip structure, and is arranged parallel to the mounting base 101; a number of detection heads 3 are provided on the front side wall of the sliding seat 19. The number of detection heads 3 are arranged at intervals along the extension direction of the sliding seat 19 and correspond to the three-way valve 23 to ensure that the common valve port 2301 and the airtightness of the three-way valve 23 can be sealed.

[0039] Understandably, the detection head 3 can be configured to have a substrate and a pressure sensor. The substrate is a tubular structure and is coaxially positioned with the tubular portion where the common valve port 2301 is located during installation, and is sealed against the end face of the tubular portion where the common valve port 2301 is located, thereby sealing the common valve port 2301. The pressure sensor is inserted into the substrate during installation and is used to sense the air pressure at the common valve port 2301. During detection, the common valve port 2301 and the first universal valve port 2302 are connected to form a first flow path, and then external gas is introduced into the second universal valve port. When the pressure sensor detects that the pressure at the common valve port 2301 is greater than atmospheric pressure and the difference between the two is greater than a preset value, it indicates that the first flow path of the three-way valve 23 is leaking and has poor airtightness. Then, the common valve port 2301 and the second universal valve port 2302 are connected to form a second flow path. Then, external gas is introduced into the first universal valve port 2302. When the pressure sensor detects that the pressure at the common valve port 2301 is greater than atmospheric pressure and the difference between the two is greater than a preset value, it indicates that the second flow path of the three-way valve 23 is leaking and has poor airtightness.

[0040] The sliding seat 19 can slide horizontally in the front-back direction, thereby synchronously driving all the detection heads 3 to slide towards or away from the three-way valve 23. When the sliding seat 19 slides backward, the detection heads 3 simultaneously slide away from the three-way valve 23, facilitating the installation or removal of the three-way valve 23. When the sliding seat 19 slides forward, the detection heads 3 simultaneously slide towards the three-way valve 23, facilitating the sealing of the common valve port 2301 and the detection of the airtightness of the three-way valve 23. Several first sliding grooves are provided on the top of the mounting base 101. The first sliding grooves extend horizontally in the left-right direction and are arranged at equal intervals along the extension direction of the mounting base 101. A slider is fixedly provided at the bottom of each support 2. The slider slides into the first sliding groove during installation, allowing the support 2 to slide horizontally in the left-right direction. This allows the position of the three-way valve 23 to be adjusted so that the position of the common valve port 2301 corresponds to the position of the detection head 3, facilitating sealing and airtightness testing.

[0041] Each support 2 has a pair of clamping seats 4 on its left and right sides, with the clamping seats 4 of the same pair arranged horizontally at intervals in the left and right direction. Except for the two outermost clamping seats 4, each clamping seat 4 adjacent to the outermost clamping seat 4 has a through hole 401 penetrating through its inner wall. The through hole 401 communicates with a universal valve port 2302. A first sealing element 5 is installed on the inner wall of each clamping seat 4 adjacent to the outermost clamping seat 4. The first sealing element 5 is annular in structure and can be made of rubber. It can be fitted with a nut around the through hole 401 to ensure a seal on the two universal valve ports 2302 of the two outermost three-way valves 23. The other pairs of clamping seats 4 have through holes 401 penetrating through their mutually distant sidewalls, with the through holes 401 communicating with the universal valve ports 2302. 2. The other pairs of clamping seats 4 are equipped with a first sealing element 5 on their side walls that are far apart from each other. The first sealing element 5 is an annular structure and can be made of rubber material. It can be fitted onto the outer periphery of the through hole 401 with a nut to ensure that all general valve ports 2302 except for the two outermost general valve ports 2302 of the two outermost three-way valves 23 are sealed. The clamping seat 4 can slide elastically horizontally in the left and right direction. Under the elastic action, the two clamping seats 4 of the same pair tend to move closer to each other. Therefore, when other structures are inserted between the two clamping seats 4 of the same pair, the two clamping seats 4 of the same pair will move away from each other. This can improve the sealing effect of the through hole 401 through the first sealing element 5, thereby helping to reduce the impact on the airtightness test results of the three-way valve 23.

[0042] The clamping base 4 is connected to the support 2 through the following structure:

[0043] Two sets of fixing blocks 1011 are fixedly installed on the top of the mounting base 101. The two sets of fixing blocks 1011 are arranged at intervals along the front-to-back direction. Multiple fixing blocks 1011 in the same set are arranged at intervals along the left-to-right direction. A total of four fixing blocks 1011 are provided on the same side of the same support 2. Two support rods 1012 are connected to these four fixing blocks 1011. The two support rods 1012 are arranged at intervals along the front-to-back direction and extend horizontally along the left-to-right direction. The left end of the support rod is fixed to the fixing block 1011 located on the left side by a nut, and the right end is fixed to the fixing block 1011 located on the right side by a nut. On the side fixing block 1011, two clamping seats 4 are simultaneously slidably sleeved on the two support rods 1012. The two clamping seats 4 are arranged horizontally and spaced apart in the left and right direction. Two compression springs are sleeved on each support rod 1012. The two compression springs on the same support rod 1012 are arranged spaced apart in the left and right direction. One compression spring is connected between the fixing block 1011 on the left and the clamping seat 4 on the left, and the other compression spring is connected between the fixing block 1011 on the right and the clamping seat 4 on the right. Under the action of the compression springs, the two clamping seats 4 tend to move closer to each other.

[0044] Each pair of clamping seats 4 is hinged with a switching part 6. The switching part 6 has a C-shaped structure and is initially set with its opening facing upward. Under the action of the switching part 6, the two clamping seats 4 of the same pair will move away from each other, thereby improving the sealing effect on the through hole 401 through the first sealing element 5, which helps to reduce the impact on the airtightness test results of the three-way valve 23. Each side wall of the switching part 6 is provided with a second sealing element 7, a third sealing element 8 and a fourth sealing element 9 in sequence along the circumference. The second sealing element 7 includes two first sealing pieces, which are symmetrically arranged on the left and right side walls of the switching part 6 and are used to block the through hole 401, so as to facilitate the testing of the airtightness of the first flow path or the second flow path of the three-way valve 23. The third sealing element 8 includes two second sealing pieces, which are symmetrically arranged on the left and right side walls of the switching part 6 and are used to block the through hole 401, so as to facilitate the testing of the airtightness of the first flow path or the second flow path of the three-way valve 23.

[0045] The fourth sealing element 9 includes two third sealing plates, which are symmetrically arranged on the left and right side walls of the switching part 6 and are used to seal the through hole 401, facilitating the introduction of external gas into the through hole 401, thereby enabling the airtightness testing of the first or second flow path of the three-way valve 23; each switching part 6 has a gas flow path 601, which has a T-shaped structure and has a horizontal section and a vertical section, wherein the horizontal section passes through the fourth sealing plate and communicates with the through hole 401, and the vertical section communicates with the external gas source, thereby enabling external gas to be introduced into the universal valve port 2302 through the through hole 401; the first sealing plate, the second sealing plate, and the third sealing plate all form a stepped structure with the side wall of the switching part 6, in During the rotation of the switching unit 6, when the switching unit 6 rotates to the position of the clamping seat 4 between the first sealing plate and the second sealing plate, or between the second sealing plate and the third sealing plate, under the action of the compression spring, the two clamping seats 4 of the same pair can approach each other, so that the first sealing member 5 no longer seals the through hole 401 tightly, thereby allowing the gas in the general valve port 2302 that is not connected to the common valve port 2301 to be discharged, avoiding affecting the airtightness test result of the second flow path; adjacent switching units 6 can rotate synchronously in opposite directions, so that without changing the valve position, they can both switch the general valve port 2302 that is connected to the gas flow path 601 and discharge the gas in the general valve port 2302 that is not connected to the common valve port 2301.

[0046] It is understandable that the gas flow path 601 can be filled with air by using an external air source controlled by a micro air pump and a pneumatic valve, or by using a hydraulic-pneumatic conversion device.

[0047] The switching unit 6 is connected to the clamping base 4 via the following structure:

[0048] A hinge joint is provided on the top of each clamping seat 4, and a hinge rod 602 is symmetrically provided on the left and right side walls of each switching part 6. The hinge rod 602 extends horizontally in the left and right direction. When installing, the two hinge rods 602 on the same switching part 6 are respectively rotated and inserted into the hinge joints on the two clamping seats 4 of the same pair to ensure that the switching part 6 can form a hinged engagement with the clamping seat 4.

[0049] Initially, the sliding seat 19 and the fixed seat are positioned far apart from each other; the first sealing plate and the third sealing plate are at the same horizontal height, with the third sealing plate located in front of the first sealing plate, and the second sealing plate located below both the first and third sealing plates.

[0050] Taking the simultaneous testing of four three-way valves 23 as an example. First, place the four three-way valves 23 on the four supports 2 respectively. At this time, all the through holes 401 are blocked by the second sealing plate. Then, drive the sliding seat 19 to slide forward, as shown. Figure 1 As shown, until the detection head 3 seals the common valve port 2301. Then, the adjacent switching parts 6 are driven to rotate synchronously in opposite directions, and the odd-numbered switching parts 6 rotate counterclockwise, and the even-numbered switching parts 6 rotate clockwise, until the third sealing plate on the odd-numbered switching parts 6 seals the through hole 401, and the first sealing plate on the even-numbered switching parts 6 blocks the through hole 401, as shown. Figure 10 As shown, at this time, the left general-purpose valve port 2302 of the first three-way valve 23 from left to right is connected to the gas flow path 601 in the first switching section 6 from left to right, and the right general-purpose valve port 2302 is connected to the common valve port 2301. The left general-purpose valve port 2302 of the second three-way valve 23 from left to right is connected to the common valve port 2301, and the right general-purpose valve port 2302 is connected to the gas flow path 601 in the second switching section 6 from left to right. The left general-purpose valve port 2302 of the third three-way valve 23 from left to right is connected to the gas flow path 601 in the third switching section 6 from left to right, and the right general-purpose valve port 2302 is connected to the common valve port 2301. The left general-purpose valve port 2302 of the fourth three-way valve 23 from left to right is connected to the common valve port 2301, and the right general-purpose valve port 2302 is connected to the gas flow path 601 in the fourth switching section 6 from left to right. Then, gas is simultaneously introduced into all gas flow paths 601 through an external gas source, and the pressure change in the common valve port 2301 is detected by the detection head 3. When the pressure sensor detects that the pressure at the common valve port 2301 is greater than atmospheric pressure, and the difference between the two is greater than a preset value, it indicates that the current flow path of the three-way valve 23 is leaking and the airtightness is poor.

[0051] After the test is completed, the adjacent switching parts 6 are driven to rotate synchronously in opposite directions, with the odd-numbered switching parts 6 rotating clockwise and the even-numbered switching parts 6 rotating counterclockwise, until the first sealing plate on the odd-numbered switching parts 6 blocks the through hole 401 and the third sealing plate on the even-numbered switching parts 6 seals the through hole 401. Figure 11 As shown, at this time, the left general-purpose valve port 2302 and the common valve port 2301 of the first three-way valve 23 from left to right are connected, and the right general-purpose valve port 2302 is connected to the gas flow path 601 in the second switching section 6 from left to right. The left general-purpose valve port 2302 of the second three-way valve 23 from left to right is connected to the gas flow path 601 in the second switching section 6 from left to right. The right general-purpose valve port 2302 and the common valve port 2301 are connected. The left general-purpose valve port 2302 and the common valve port 2301 of the third three-way valve 23 from left to right are connected, and the right general-purpose valve port 2302 is connected to the gas flow path 601 in the fourth switching section 6 from left to right. The left general-purpose valve port 2302 of the fourth three-way valve 23 from left to right is connected to the gas flow path 601 in the fourth switching section 6 from left to right. The right general-purpose valve port 2302 and the common valve port 2301 are connected. Then, gas is simultaneously supplied to all gas flow paths 601 through an external gas source, and the pressure change in the common valve port 2301 is detected by the detection head 3. When the pressure sensor detects that the pressure at the common valve port 2301 is greater than atmospheric pressure, and the difference between the two is greater than a preset value, it indicates that the current flow path of the three-way valve 23 is leaking and the airtightness is poor.

[0052] After the test is completed, the adjacent switching parts 6 are driven to rotate synchronously in opposite directions, with the odd-numbered switching parts 6 rotating counterclockwise and the even-numbered switching parts 6 rotating clockwise, until the switching parts 6 return to their initial positions. Then, the sliding seat 19 is driven to slide backward, causing the detection head 3 and the three-way valve 23 to disengage, making it easier to remove the three-way valve 23. Subsequently, the airtightness test of the next batch of three-way valves 23 can begin.

[0053] In a further embodiment, to improve the accuracy of the airtightness test results of the three-way valve 23, the thickness of the fourth sealing element 9 is set to be greater than both the thickness of the second sealing element 7 and the thickness of the third sealing element 8.

[0054] Specifically, in this embodiment, the thickness of the third sealing plate is greater than that of both the first and second sealing plates. With this configuration, when the switching unit 6 rotates to align the third sealing plate with the through hole 401, the distance between the two clamping seats 4 of the same pair is greater under the pushing action of the third sealing plate. This results in greater deformation of both the first sealing element 5 and the third sealing plate, thereby improving both the sealing effect of the fourth sealing element 9 on the through hole 401 and the sealing effect of the first sealing element 5 on the through hole 401. This, in turn, reduces the impact on the airtightness test results of the three-way valve 23.

[0055] In other embodiments, to enable adjacent switching sections 6 to rotate synchronously in opposite directions, each switching section 6 is provided with a plug rod 603. The plug rod 603 is located at the notch of the switching section 6 and extends radially along the switching section 6. A first control rod 10 is connected to the odd-numbered switching sections 6. The first control rod 10 extends horizontally in the front-back direction. A plurality of first connecting sleeves 1001 are vertically arranged on the first control rod 10. The plurality of first connecting sleeves 1001 are arranged at intervals along the extension direction of the first control rod 10. When installed, the first connecting sleeves 1001 are fixedly sleeved on the plug rods 603 on the odd-numbered switching sections 6 to ensure that all odd-numbered switching sections 6 can be driven synchronously. Rotation; a second control lever 11 is connected to the even-numbered switching parts 6. The second control lever 11 extends horizontally in the front-back direction. Multiple second connecting sleeves 1101 are vertically arranged on the second control lever 11. The multiple second connecting sleeves 1101 are arranged at intervals along the extension direction of the second control lever 11. When installed, the second connecting sleeves 1101 are fixedly sleeved on the insertion rods 603 on the even-numbered switching parts 6 to ensure that all even-numbered switching parts 6 can be driven to rotate synchronously; the first control lever 10 and the second control lever 11 are connected by a synchronization component. Under the action of the synchronization component, the first control lever 10 and the second control lever 11 can synchronously drive the adjacent switching parts 6 to rotate in opposite directions.

[0056] Furthermore, the synchronization assembly is configured to include two first racks 1201, two second racks 1202, and two rotating shafts 1203. The two first racks 1201 are respectively vertically and fixedly disposed at both ends of the first control lever 10. The first racks 1201 have an arc-shaped structure, and their centers coincide with the axis of the hinge rod 602. The two second racks 1202 are respectively vertically and fixedly disposed at both ends of the second control lever 11. The second racks 1202 have an arc-shaped structure, and their centers coincide with the axis of the hinge rod 602. The lines coincide; two support arches 102 are fixedly installed on the top of the base 1. The two support arches 102 are arranged at intervals in the front-to-back direction, and the support arch 102 located on the frontmost pair of clamping seats 4 is mounted on the backmost pair of clamping seats 4. The support arches 102 have an inverted U-shaped structure; the rotating shaft 1203 is inserted through the support arch 102 during installation and extends horizontally in the front-to-back direction. The rotating shaft 1203 can rotate around its own axis. The rotating shaft 1203 has two first gears 1204 fixedly sleeved at both ends. The two first gears 1204 on the same rotating shaft 1203 are located on the front and rear sides of the same supporting arch 102, respectively, and mesh with the first rack 1201 and the second rack 1202 on the same side. The first rack 1201 is located on the outer side of the supporting arch 102, and the second rack 1202 is located on the inner side of the supporting arch 102. The first rack 1201 is located on the upper side of the first gear 1204 and meshes with the first gear 1204. The gears 1204 are internally meshed, so that the first gear 1204 and the first rack 1201 rotate in the same direction when meshed. The second rack 1202 is located below the first gear 1204 and is externally meshed with the first gear 1204, so that the first gear 1204 and the second rack 1202 rotate in opposite directions when meshed. This ensures that the first control lever 10 and the second control lever 11 rotate in opposite directions, thereby driving the adjacent switching part 6 to rotate synchronously in opposite directions.

[0057] During use, the first control lever 10 is manually pushed to rotate. On one hand, the first control lever 10 drives all the odd-numbered switching parts 6 to rotate synchronously through the cooperation between the first connecting sleeve 1001 and the insertion rod 603 on the odd-numbered switching part 6; on the other hand, it drives the first rack 1201 to rotate. The first rack 1201 drives the rotating shaft 1203 to rotate through the meshing between the first gear 1204 and the first gear 1204. The rotating shaft 1203 drives the other first gear 1204 to rotate synchronously through the meshing between the other first gear 1204 and the second rack 1202. The second control lever 11 drives all the even-numbered switching parts 6 to rotate synchronously through the cooperation between the second connecting sleeve 1101 and the insertion rod 603 on the even-numbered switching part 6, and the direction of rotation is opposite to that of the even-numbered switching parts 6.

[0058] Taking the simultaneous testing of two three-way valves 23 as an example, the number of switching parts 6 is set to three. The first control lever 10 is provided with two first connecting sleeves 1001, which are fixedly sleeved on the insertion rod 603 on the first switching part 6 from left to right and the insertion rod 603 on the third switching part 6 respectively. The second control lever 11 is provided with a second connecting sleeve 1101, which is fixedly sleeved on the insertion rod 603 on the second switching part 6 from left to right.

[0059] Taking the simultaneous testing of four three-way valves 23 as an example, the number of switching parts 6 is set to five. The first control lever 10 is provided with three first connecting sleeves 1001. The three first connecting sleeves 1001 are respectively fixedly sleeved on the insertion rod 603 on the first switching part 6 from left to right, the insertion rod 603 on the third switching part 6, and the insertion rod 603 on the fifth switching part 6. To avoid interference, the second control lever 11 is composed of two separate parts, and each separate part is provided with a second connecting sleeve 1101. The second connecting sleeve 1101 on the front part is fixedly sleeved on the insertion rod 603 on the second switching part 6 from left to right, and the second connecting sleeve 1101 on the rear part is fixedly sleeved on the insertion rod 603 on the fourth switching part 6 from left to right. One second rack 1202 is vertically and fixedly set at the front end of the front part, and the other second rack 1202 is vertically and fixedly set at the rear end of the rear part.

[0060] In other embodiments, each three-way valve 23 has a valve core and an adjusting wrench 2303. The adjusting wrench 2303 is located on the front side of the three-way valve 23 and is configured to drive the valve core to rotate, thereby adjusting the connection between the common valve port 2301 and one of the general valve ports 2302. To simultaneously achieve the switching of the flow paths of all three-way valves 23 and improve the ease of operation, multiple support blocks 103 are also fixedly installed on the top of the base 1. The support blocks 103 are located on the front side of the base 1 and are arranged along the left and right sides. Each support block 103 is arranged at intervals, and a second sliding groove is opened on its top. The second sliding groove extends horizontally in the front-to-back direction, and a third rack 13 is slidably inserted into all the second sliding grooves. Exemplarily, two support blocks 103 can be provided. Several support bars 104 are also fixedly installed on the top of the base 1. These support bars 104 are arranged at intervals in the left-to-right direction and correspond to the support 2. The support bars 104 are located on the front side of the base 1 and extend in the up-down direction. The rear side of each support bar 104... Each rotating wheel 15 is rotatably mounted, with its axis extending horizontally in the front-to-back direction. A second gear 16 is coaxially and fixedly mounted on each rotating wheel 15, located in front of the rotating wheel 15 and meshing with a third rack 13. A stop bar 1501 is vertically and fixedly mounted on the rear side of each rotating wheel 15, eccentrically positioned with the rotating wheel 15 and located below the adjusting wrench 2303, forming a stop with the adjusting wrench 2303. One of the switching units 6 is connected via a transmission... The component is connected to the third rack 13. Under the action of the transmission component, when the switching part 6 rotates, it can drive the third rack 13 to slide. When the third rack 13 slides, it synchronously drives all the second gears 16 to rotate through the meshing between the second gear 16. The second gear 16 drives the rotating wheel 15 to rotate. The rotating wheel 15 drives the stop rod 1501 to rotate. The stop rod 1501 drives the adjusting wrench 2303 to rotate through the stop cooperation between it and the adjusting wrench 2303, thereby driving the valve core to rotate, thereby changing the flow path of the three-way valve 23.

[0061] In a further embodiment, the transmission assembly includes a fourth rack 14, a fifth rack 18, and a connecting rod 17. A third groove 1013 is vertically formed in the middle of the mounting base 101, and the fourth rack 14 is slidably inserted into the third groove 1013 during installation. The connecting rod 17 is hinged between the third rack 13 and the fourth rack 14. The fifth rack 18 is fixedly mounted on the switching part 6 located in the middle. The fifth rack 18 has an arc-shaped structure and meshes with the fourth rack 14. When the switching part 6 rotates, the switching part 6 synchronously drives the fifth rack 18 to rotate. 8 drives the fourth rack 14 to slide along the third slide groove 1013 through meshing with the fourth rack 14. The fourth rack 14 drives the third rack 13 to slide through the connecting rod 17. When the third rack 13 slides, it simultaneously drives all the second gears 16 to rotate through meshing with the second gear 16. The second gear 16 drives the rotating wheel 15 to rotate. The rotating wheel 15 drives the stop rod 1501 to rotate. The stop rod 1501 drives the adjusting wrench 2303 to rotate through the stop engagement with the adjusting wrench 2303, thereby driving the valve core to rotate, thus changing the flow path of the three-way valve 23.

[0062] To improve the stability of the third rack 13 during sliding, a notch is provided on the front side wall of each support arch 102, and the third rack 13 is slidably inserted into the notch during installation.

[0063] In other embodiments, to improve the stability of the sliding seat 19 during sliding, a first slide rail 20 is fixedly provided on the top of the base 1. The first slide rail 20 extends horizontally in the front-back direction and is located on the rear side of the fixed seat. The sliding seat 19 is slidably sleeved on the first slide rail 20 during installation.

[0064] In a further embodiment, to further improve the stability of the sliding seat 19 during sliding, the number of first slide rails 20 can be set to two, and they are arranged at intervals along the left and right directions.

[0065] In other embodiments, a drive member is also provided on the base 1, the drive member being configured to provide a driving force for sliding the slide seat 19.

[0066] Specifically, in this embodiment, the driving component can be configured as a driving cylinder 21. The driving cylinder 21 is installed on the top of the base 1 and located on the rear side of the fixed seat. The output shaft of the driving cylinder 21 extends horizontally in the front-back direction and faces forward, and is vertically fixed on the sliding seat 19 to ensure that it can drive the sliding seat 19 to slide.

[0067] It is understandable that the drive cylinder 21 can be configured as any one of a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.

[0068] In other embodiments, to improve the accuracy of the airtightness test results of the three-way valve 23, a second slide rail 22 is provided on the front side wall of the sliding seat 19, and the second slide rail 22 extends horizontally in the front-back direction; the detection head 3 is slidably sleeved on the second slide rail 22 during installation, thereby adjusting the relative position between the detection head 3 and the three-way valve 23, ensuring that the detection head 3 can better seal the common valve port 2301.

[0069] In other embodiments, to improve ease of operation, a handle is provided on the first control lever 10, so that the operator can easily rotate the first control lever 10 by using the handle.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A non-destructive testing device for valves, characterized in that, The non-destructive testing equipment for valves is configured to perform airtightness testing on three-way valves, which have a common valve port and two universal valve ports. The equipment includes a base with several supports arranged side-by-side on it. These supports can slide along their own arrangement direction and are configured to support the three-way valve. Several testing heads are also arranged side-by-side on the base. All testing heads can slide synchronously along a direction perpendicular to the supports and are configured to seal the common valve port and test the airtightness of the three-way valve. Each support has a pair of clamping seats on both sides, with different pairs of clamping seats arranged along the support's arrangement direction. The clamping seats can elastically slide along the support's arrangement direction. The clamping seats are equipped with… A through hole and a first seal are connected, and the through hole and a universal valve port are connected. The first seal is configured to seal the universal valve port. Two clamping seats in the same pair are hinged together with a switching part, and adjacent switching parts can rotate synchronously in opposite directions. A second seal, a third seal and a fourth seal are arranged sequentially along the circumference of each switching part. The second seal, the third seal and the fourth seal all form a stepped structure with the switching part. The second seal and the third seal are configured to block the through hole, and the fourth seal is configured to seal the through hole. A gas flow path is opened on each switching part. The gas flow path passes through the fourth seal and is connected to the through hole. It is configured to receive gas from the outside. The thickness of the fourth seal is greater than that of both the second and third seals; The odd-numbered switching sections are connected to a first control lever, which extends in a direction parallel to the arrangement of the supports; the even-numbered switching sections are connected to a second control lever, which extends in a direction parallel to the arrangement of the supports; the first and second control levers are connected by a synchronization component, and under the action of the synchronization component, the first and second control levers can synchronously drive adjacent switching sections to rotate in opposite directions. The synchronization assembly includes a first rack, a second rack, and two rotating shafts. A first rack, which has an arc-shaped structure, is fixedly mounted on both ends of the first control lever. A second rack, also with an arc-shaped structure, is fixedly mounted on both ends of the second control lever. The rotating shafts are mounted on the base and can rotate around their own axes. The two rotating shafts are spaced apart along the arrangement direction of the support. Two first gears are fixedly fitted onto each rotating shaft. The two first gears on the same rotating shaft mesh with the first and second racks on the same side, respectively, in an internal meshing and an external meshing configuration. Each three-way valve has a valve core and an adjusting wrench. The adjusting wrench is configured to rotate the valve core to adjust the connection between the common valve port and one of the general-purpose valve ports. The base is also equipped with a third rack and several rotating wheels. The third rack extends in a direction parallel to the arrangement of the supports and can slide in the same direction. The several rotating wheels are spaced apart in a direction parallel to the arrangement of the supports and are corresponding to the three-way valves. The rotating wheels can rotate around their own axes. Each rotating wheel is fixed and coaxially equipped with a second gear, which meshes with the third rack. Each rotating wheel is eccentrically equipped with a stop bar, which can form a stop with the adjusting wrench. One of the switching parts is connected to the third rack through a transmission assembly. Under the action of the transmission assembly, the rotation of the switching part can drive the third rack to slide.

2. The non-destructive testing equipment for valves according to claim 1, characterized in that, The transmission assembly includes a fourth rack, a fifth rack, and a connecting rod. The fourth rack is mounted on the base and extends in a direction perpendicular to the arrangement of the supports, and can slide in the same direction. The fifth rack is mounted on the switching part and has an arc-shaped structure, and meshes with the fourth rack. The connecting rod is hinged between the third rack and the fourth rack.

3. The non-destructive testing equipment for valves according to claim 1, characterized in that, The base is also equipped with a sliding seat, which can slide in a direction perpendicular to the arrangement of the supports; all the detection heads are arranged side by side on the sliding seat.

4. The non-destructive testing equipment for valves according to claim 3, characterized in that, The base is also fixedly provided with a first slide rail, which extends in a direction perpendicular to the arrangement of the supports; the sliding seat is slidably sleeved on the first slide rail.

5. The non-destructive testing equipment for valves according to claim 3, characterized in that, The base is also equipped with a drive unit, which is configured to provide the driving force for the sliding seat to slide.

6. The non-destructive testing equipment for valves according to claim 3, characterized in that, A second slide rail is provided on the sliding seat, and the second slide rail extends in a direction parallel to the arrangement of the supports; the detection head is slidably sleeved on the second slide rail.

Images