A narrow channel impeller weld penetration detection tool

Abstract

The utility model relates to a kind of impeller weld penetration detection tool, specifically a kind of narrow runner impeller weld penetration detection tool, to solve the technical problems such as low detection reliability, low detection efficiency, personnel work intensity is big and easy to cause occupational injury when adopting solvent removal type colored penetration detection method to narrow runner impeller weld detection.This utility model includes chassis, impeller support shaft, two support seats and two height adjusting devices;Two support seats are connected with chassis by one height adjusting device respectively;The top of two support seats is provided with limiting recess, the both ends of impeller support shaft are rotatably arranged in two limiting recesses during detection, and height adjusting device includes upper support piece, lower support piece and locking assembly;Lower support piece is fixedly connected with chassis, upper support piece is slidably connected with lower support piece, and support seat is fixedly connected on corresponding upper support piece;Locking assembly is used to lock the relative position of upper support piece and lower support piece.

Description

Technical Field

[0001] This utility model relates to a penetrant testing fixture for impeller welds, specifically a penetrant testing fixture for narrow-channel impeller welds. Background Technology

[0002] The principle of penetrant testing is that a penetrant containing a colored (or fluorescent) dye is applied to the surface of a part. Due to capillary action, the penetrant will seep into the defects that open on the surface. When the penetrant is removed from the surface of the part and the surface is dried, and a developer is applied, the penetrant in the defects will seep back to the surface of the part due to capillary action, and will then be discovered by the flaw detector, thus completing the penetrant testing operation.

[0003] Existing penetrant testing techniques for impeller welds include, for example... Figure 1 As shown, after placing the impeller 02 horizontally on the workbench 01, a solvent-removable dye penetrant testing method is used to apply penetrant to the surface of the flow channel weld 03. After waiting for 10-15 minutes, excess penetrant is manually wiped off the impeller weld surface with a cleaning agent and a lint-free cloth. After the surface of the flow channel weld 03 is dry, a developer is applied, and after waiting for 10 minutes, the flow channel weld 03 is observed with the aid of a light source, thus completing the penetrant testing.

[0004] However, when using the existing detection technology to inspect the flow channel welds of narrow flow channel impellers (i.e., impellers with a flow channel cross-section of <50mm×50mm), due to the horizontal placement of the impeller and the narrow flow channel, it is not easy to completely remove excess penetrant during manual wiping. During development, the residual penetrant will be mixed with the defect display, which can easily lead to false detections and affect the reliability of penetrant testing. In addition, with the impeller placed horizontally on the workbench, the flaw detector must bend over and tilt their head for a long time to observe, and such poor working posture can easily cause occupational injuries. Although, theoretically, solvent-removable dye penetrant testing has a lower false detection rate for inspecting weld seams in narrow-channel impellers compared to water-washing penetrant testing, the narrow channel means that the penetrant on the weld surface deep within the channel cannot be completely removed, still easily leading to false detections. Furthermore, solvent-removable dye penetrant testing is not only more expensive, but also requires manual cleaning with detergent and lint-free cloths to remove the penetrant from the weld surface. This process is time-consuming and labor-intensive. Moreover, to prevent the penetrant from drying out and affecting removal and subsequent development, only one impeller can be tested at a time, resulting in extremely low efficiency and impacting the overall product production cycle. Utility Model Content

[0005] The purpose of this invention is to solve the technical problems of low reliability, low efficiency, high labor intensity and occupational injury when using solvent-removable dye penetrant testing method to inspect narrow flow channel impeller welds, and to provide a tooling for penetrant testing of narrow flow channel impeller welds.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A special feature of a narrow-channel impeller weld penetration testing fixture is that:

[0008] It includes a chassis, impeller support shaft, two support bases, and two height adjustment devices;

[0009] Each of the two support bases is connected to the chassis via a height adjustment device;

[0010] Two support bases are arranged opposite each other in the horizontal direction, and each of them is provided with a limiting notch at its top. The two ends of the impeller support shaft are rotatably set in the two limiting notches during the test. The impeller support shaft is used to pass through the inner hole of the narrow flow channel impeller to be tested during the test.

[0011] The height adjustment device includes an upper support, a lower support, and a locking assembly;

[0012] The lower support is fixedly connected to the chassis, the upper support is slidably connected to the lower support, and the support base is fixedly connected to the corresponding upper support; the locking assembly is connected to the upper and lower support to lock the relative positions of the upper and lower support.

[0013] Furthermore, both the upper and lower support members are tubular, and the lower part of the upper support member and the lower support member can be slidably connected up and down;

[0014] One of the upper support member and the lower support member is provided with multiple adjustment holes distributed in the vertical direction, and the other is provided with one or more adjustment holes distributed in the vertical direction at the corresponding position.

[0015] The locking assembly includes a pin that passes through adjustment holes on both the upper and lower supports simultaneously to lock the relative positions of the upper and lower supports.

[0016] Furthermore, the upper end of the upper support member is fixedly connected to the corresponding support seat by welding, and the lower end of the lower support member is fixedly connected to the chassis by welding. The lower support member is sleeved on the outer side of the lower part of the upper support member.

[0017] The upper support member is provided with a plurality of first adjustment holes distributed in the vertical direction, each of which penetrates the upper support member radially. The lower support member is provided with a plurality of second adjustment holes distributed in the vertical direction at corresponding positions, each of which penetrates the lower support member radially.

[0018] Furthermore, the support base includes a bracket, two roller support shafts, and two rollers;

[0019] The bracket is fixedly connected to the upper end of the upper support component;

[0020] Two rollers are rotatably mounted on the bracket via a roller support shaft. The rotation axes of the two rollers are parallel to the axis of the impeller support shaft, and a limiting notch is formed between the two rollers. The two rollers are used to support the lower sides of the end of the impeller support shaft, respectively.

[0021] Furthermore, both ends of the two roller support shafts are fixedly connected to the bracket;

[0022] Both rollers are ball bearings. The inner rings of the two ball bearings are fixedly connected to the corresponding roller support shafts, and the outer rings of the two ball bearings are supported on both sides below the end of the impeller support shaft.

[0023] Furthermore, the support also includes a limiting block, which is fixedly mounted on the bracket and located on the side of the limiting recess away from the other support, to prevent axial sliding of the impeller support shaft.

[0024] Furthermore, the support has a box-shaped structure with an opening at the top;

[0025] The two ends of the roller support shaft are fixedly connected to the two side walls of the bracket by welding;

[0026] The inner ring of the ball bearing is fixedly connected to the roller support shaft by welding or interference fit;

[0027] The lower part of the limiting block is fixedly connected to the bracket by welding and is located between the two roller support shafts.

[0028] Furthermore, the chassis is equipped with weight-reducing grooves to reduce its weight.

[0029] Furthermore, the upper support, lower support, limit block, and chassis are all made of steel.

[0030] The advantages of this utility model compared to the prior art are:

[0031] 1. This utility model discloses a narrow-channel impeller weld penetration testing fixture, which consists of two support bases, each connected to a chassis via a height adjustment device. The two ends of the impeller support shaft are rotatably mounted in limiting recesses at the top of the two support bases during testing. The impeller support shaft is inserted into the inner hole of the narrow-channel impeller to be tested, allowing for height adjustment. Testing can be performed by rotating the narrow-channel impeller, improving testing efficiency. Furthermore, testing personnel do not need to bend over or tilt their heads for extended periods during testing, maintaining a normal working posture and avoiding occupational injuries caused by improper working postures.

[0032] 2. In the narrow-channel impeller weld penetration testing fixture of this utility model, an impeller support shaft is provided for passing through the inner hole of the narrow-channel impeller to be tested during testing. This allows the narrow-channel impeller to be vertically suspended on the fixture during testing. With the impeller placed vertically, the wastewater is easily discharged when excess penetrant is removed by water washing, eliminating the problem of excess penetrant residue. In addition, the flow channel of the narrow-channel impeller can be positioned directly in front of the testing personnel's viewpoint, facilitating observation and effectively improving the reliability of the test. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a common impeller weld penetration testing fixture used for impeller weld penetration testing.

[0034] Figure 1 The annotations in the accompanying drawings are explained as follows:

[0035] 01-Workbench surface, 02-Impeller, 03-Flow channel weld.

[0036] Figure 2 This is a schematic diagram of the structure of a narrow-channel impeller weld penetration testing fixture according to an embodiment of the present invention during impeller weld penetration testing;

[0037] Figure 3 This is a partial cross-sectional view of an embodiment of a narrow-channel impeller weld penetration testing tool according to the present invention;

[0038] Figure 4 This is a top view of the chassis and height adjustment device (pins not shown) in an embodiment of a narrow-channel impeller weld penetration testing fixture of this utility model.

[0039] Figure 5 This is a cross-sectional view of the support base in an embodiment of a narrow-channel impeller weld penetration testing fixture of this utility model.

[0040] Figures 2 to 5 The annotations in the accompanying drawings are explained as follows:

[0041] 1-Chassis, 11-Weight reduction groove, 2-Support base, 21-Bracket, 22-Roller support shaft, 23-Roller, 24-Limiting block, 25-Limiting notch, 3-Height adjustment device, 31-Upper support component, 311-First adjustment hole, 32-Lower support component, 321-Second adjustment hole, 33-Locking assembly, 4-Impeller support shaft, 5-Narrow flow channel impeller. Detailed Implementation

[0042] To make the objectives, advantages and features of this utility model clearer, the following describes in detail, with reference to the accompanying drawings and specific embodiments, a narrow-channel impeller weld penetration testing tool proposed by this utility model.

[0043] In the description of this utility model, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] Reference Figure 2 The present invention relates to a narrow-channel impeller weld penetration testing fixture, comprising a chassis 1, an impeller support shaft 4, two support seats 2, and two height adjustment devices 3.

[0045] like Figure 2 and Figure 4 As shown, the chassis 1 is rectangular in shape and made of steel. The chassis 1 supports the support base 2, the height adjustment device 3, and the weight of the impeller support shaft 4 and the narrow-channel impeller 5 during testing. Preferably, the chassis 1 is provided with a weight-reducing groove 11. The weight-reducing groove 11 reduces the weight of the chassis 1, thereby facilitating the movement of the entire narrow-channel impeller weld penetration testing fixture by the testing personnel.

[0046] like Figure 2 As shown, each of the two support bases 2 is connected to the chassis 1 via a height adjustment device 3. The two support bases 2 are arranged opposite each other in the horizontal direction. Each support base 2 has a limiting notch 25 on its top. The two ends of the impeller support shaft 4 are rotatably set in the two limiting notches 25 during testing. The impeller support shaft 4 is used to pass through the inner hole of the narrow flow channel impeller 5 to be tested during testing. During testing, the narrow flow channel impeller 5 passes through its inner hole onto the impeller support shaft 4, so that the narrow flow channel impeller 5 is vertically suspended on the narrow flow channel impeller weld penetration testing fixture. At this time, the radial direction of the narrow flow channel impeller 5 is located in the vertical plane, so that the flow channel of the narrow flow channel impeller 5 is facing the inspector's line of sight, which is convenient for observation and improves the reliability of the test. In addition, during testing, the height of the narrow flow channel impeller 5 is adjusted by the height adjustment device 3, and the testing is carried out by rotating the narrow flow channel impeller 5. This allows the testing personnel to avoid bending over and tilting their heads for a long time during the testing process. By maintaining a normal working posture, occupational injuries caused by poor working posture can be avoided, and the workload of the testing personnel can also be reduced.

[0047] like Figure 2 and Figure 5 As shown, the support base 2 includes a bracket 21, two roller support shafts 22, and two rollers 23. Each of the two rollers 23 is rotatably mounted on the bracket 21 via a roller support shaft 22. The rotation axes of the two rollers 23 are parallel to the axis of the impeller support shaft 4, and a limiting notch 25 is formed between the two rollers 23. The two rollers 23 are used to support the lower sides of the end of the impeller support shaft 4, respectively. Preferably, the bracket 21 has a box-shaped structure with an open top. Both ends of the two roller support shafts 22 are fixedly connected to the bracket 21. The two ends of the roller support shafts 22 are fixedly connected to the side walls of the bracket 21 by welding. Both rollers 23 are ball bearings. The inner rings of the two ball bearings are fixedly connected to the corresponding roller support shafts 22 by welding or interference fit. The outer rings of the two ball bearings are respectively supported on the lower sides of the end of the impeller support shaft 4. The roller 23 is designed to facilitate the rotation of the impeller support shaft 4 during testing, and also helps to avoid wear on the inner hole of the narrow flow channel impeller 5 during the testing process.

[0048] To prevent axial sliding of the impeller support shaft 4, the support base 2 also includes a limiting block 24. The limiting block 24 is fixedly mounted on the bracket 21 and located on the side of the limiting recess 25 away from the other support base 2. The lower part of the limiting block 24 is fixedly connected to the bracket 21 by welding and is located between the two roller support shafts 22. The upper part of the limiting block 24 is located on the side of the limiting recess 25 away from the other support base 2. The limiting block 24 is made of steel. By setting the limiting block 24, axial sliding of the impeller support shaft 4 can be prevented, thereby preventing the impeller support shaft 4 from axially falling off the support base 2 during the inspection process and improving operational safety.

[0049] like Figure 2 As shown, the height adjustment device 3 includes an upper support 31, a lower support 32, and a locking assembly 33. The lower support 32 is fixedly connected to the chassis 1, the upper support 31 is slidably connected to the lower support 32, and the support base 2 is fixedly connected to the corresponding upper support 31. The locking assembly 33 is connected to the upper support 31 and the lower support 32 to lock their relative positions. By adjusting the relative positions of the upper support 31 and the lower support 32, the height of the support base 2 can be adjusted, thereby adjusting the height of the impeller support shaft 4. This allows for the adjustment of the height of the impeller support shaft 4 to meet the testing requirements of narrow-channel impellers 5 of different sizes.

[0050] like Figure 3 and Figure 4As shown, both the upper support 31 and the lower support 32 are tubular and made of steel. The lower end of the lower support 32 is fixedly connected to the chassis 1 by welding. The lower part of the upper support 31 and the lower support 32 are slidably fitted together. The upper end of the upper support 31 is fixedly connected to the bracket 21 of the corresponding support seat 2 by welding. One of the upper support 31 and the lower support 32 is provided with multiple adjustment holes distributed vertically, and the other is provided with one or more adjustment holes at corresponding positions. The upper support 31 has several vertically distributed adjustment holes. Preferably, the lower support 32 is sleeved on the outer side of the lower part of the upper support 31. The upper support 31 has multiple vertically distributed first adjustment holes 311, and the lower support 32 has multiple vertically distributed second adjustment holes 321 at corresponding positions. The locking assembly 33 includes a pin that passes through both the first adjustment holes 311 on the upper support 31 and the second adjustment holes 321 on the lower support 32, locking the relative positions of the upper support 31 and the lower support 32. When adjusting the height of the bracket 21, the pin is first pulled out from the first adjustment holes 311 and the second adjustment holes 321. Then, the upper support 31 is raised or lowered as needed. Finally, the pin is inserted into the aligned first adjustment holes 311 and the second adjustment holes 321. The operation is very simple. To make the connection between the pin and the first adjustment hole 311 and the second adjustment hole 321 more secure and reliable, each first adjustment hole 311 passes through the upper support member 31 radially, and each second adjustment hole 321 passes through the lower support member 32 radially.

[0051] In other embodiments, the upper support member 31 may be provided with only one first adjustment hole 311, and the lower support member 32 may be provided with multiple second adjustment holes 321 distributed vertically at corresponding positions; or the upper support member 31 may be provided with multiple first adjustment holes 311 distributed vertically, and the lower support member 32 may be provided with only one second adjustment hole 321 at corresponding positions.

[0052] This utility model discloses a penetrant testing fixture for narrow-channel impeller welds. When using a water-washing penetrant test to inspect narrow-channel impeller welds, firstly, based on the specifications of the narrow-channel impeller 5 and the height of the inspector, adjust a pair of height adjustment devices 3 until the height of a pair of support seats 2 meets the normal inspection height of the inspector. Then, insert a pair of pins, and then sequentially thread multiple narrow-channel impellers 5 onto the impeller support shaft 4. Subsequently, place both ends of the impeller support shaft 4 onto the corresponding two rollers 23. Next, starting with the position where penetrant is most easily applied, apply penetrant to one flow channel weld, and then complete the process sequentially by rotating the narrow-channel impellers 5. After spraying penetrant onto all flow channel welds, wait 10-15 minutes, then use a water pipe to clean the penetrant surface of the flow channel welds. The water pressure should not exceed 0.17 MPa. The wastewater should be quickly discharged along the flow channel, effectively removing penetrant deep within the flow channel. After the flow channel weld surface dries naturally, apply developer, using the same method as penetrant application. First, apply developer to one flow channel weld, then rotate the narrow flow channel impeller 5 to sequentially apply developer to all flow channel welds. After developer application, wait 10 minutes, then observe all flow channel welds using a flashlight or other light source to complete the penetrant testing. This utility model's narrow flow channel impeller weld penetrant testing fixture, when using a water-washing type penetrant test, allows multiple narrow flow channel impellers 5 to be mounted on the impeller support shaft 4. This enables simultaneous testing of multiple narrow flow channel impellers 5, improving testing efficiency. The number of narrow flow channel impellers 5 mounted on the impeller support shaft 4 can be determined by the axial dimension of the narrow flow channel impeller 5. This utility model discloses a narrow-channel impeller weld penetration testing fixture. The narrow-channel impeller 5 is arranged vertically. When using water-washing type penetration testing, it is beneficial to remove the penetrant from the depth of the channel, eliminate the influence of residual penetrant on the test, improve the reliability of the test, facilitate the rapid discharge of wastewater from cleaning the penetrant and the drying of the test surface, and can test multiple impellers at the same time, improving the testing efficiency. In addition, by rotating the narrow-channel impeller 5 for testing, it is not only convenient for the tester to apply penetrant and developer, but also convenient for the tester to clean the penetrant.

[0053] In other embodiments, the narrow-channel impeller weld penetration testing fixture of this invention can also be applied to solvent-removable dye penetrant testing.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the specific technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this utility model.

Claims

1. A tooling for penetrant testing of narrow-channel impeller welds, characterized in that: It includes a chassis (1), an impeller support shaft (4), two support bases (2), and two height adjustment devices (3); Each of the two support bases (2) is connected to the chassis (1) via a height adjustment device (3); The two support seats (2) are arranged opposite each other in the horizontal direction, and each of them is provided with a limiting notch (25) at its top. The two ends of the impeller support shaft (4) are respectively rotatably arranged in the two limiting notches (25) during the test. The impeller support shaft (4) is used to pass through the inner hole of the narrow flow channel impeller (5) to be tested during the test. The height adjustment device (3) includes an upper support (31), a lower support (32), and a locking assembly (33); The lower support member (32) is fixedly connected to the chassis (1), the upper support member (31) is slidably connected to the lower support member (32), and the support base (2) is fixedly connected to the corresponding upper support member (31); the locking assembly (33) is connected to the upper support member (31) and the lower support member (32) and is used to lock the relative position of the upper support member (31) and the lower support member (32).

2. The penetrant testing fixture for narrow-channel impeller welds according to claim 1, characterized in that: The upper support (31) and the lower support (32) are both tubular, and the lower part of the upper support (31) and the lower support (32) can be slidably connected up and down; One of the upper support member (31) and the lower support member (32) is provided with a plurality of adjustment holes distributed in the vertical direction, and the other is provided with one or more adjustment holes distributed in the vertical direction at the corresponding position. The locking assembly (33) includes a pin that passes through adjustment holes on both the upper support (31) and the lower support (32) to lock the relative positions of the upper support (31) and the lower support (32).

3. The penetrant testing fixture for narrow-channel impeller welds according to claim 2, characterized in that: The upper end of the upper support member (31) is fixedly connected to the corresponding support seat (2) by welding, and the lower end of the lower support member (32) is fixedly connected to the chassis (1) by welding. The lower support member (32) is sleeved on the outer side of the lower part of the upper support member (31). The upper support member (31) is provided with a plurality of first adjustment holes (311) distributed in the vertical direction. Each first adjustment hole (311) penetrates the upper support member (31) radially. The lower support member (32) is provided with a plurality of second adjustment holes (321) distributed in the vertical direction at corresponding positions. Each second adjustment hole (321) penetrates the lower support member (32) radially.

4. The narrow-channel impeller weld penetration testing fixture according to any one of claims 1-3, characterized in that: The support base (2) includes a bracket (21), two roller support shafts (22) and two rollers (23); The bracket (21) is fixedly connected to the upper end of the upper support member (31); The two rollers (23) are rotatably mounted on the bracket (21) via a roller support shaft (22). The rotation axes of the two rollers (23) are parallel to the axis of the impeller support shaft (4), and the limiting notch (25) is formed between the two rollers (23). The two rollers (23) are used to support the lower sides of the end of the impeller support shaft (4).

5. The penetrant testing fixture for narrow-channel impeller welds according to claim 4, characterized in that: Both ends of the two roller support shafts (22) are fixedly connected to the bracket (21); Both rollers (23) are ball bearings. The inner rings of the two ball bearings are fixedly connected to the corresponding roller support shafts (22). The outer rings of the two ball bearings are respectively supported on both sides below the end of the impeller support shaft (4).

6. The penetrant testing fixture for narrow-channel impeller welds according to claim 5, characterized in that: The support base (2) also includes a limiting block (24), which is fixedly mounted on the bracket (21) and located on the side of the limiting recess (25) away from the other support base (2), in order to prevent the impeller support shaft (4) from sliding axially.

7. The penetrant testing fixture for narrow-channel impeller welds according to claim 6, characterized in that: The support (21) has a box-shaped structure with an opening at the top; The two ends of the roller support shaft (22) are fixedly connected to the two side walls of the bracket (21) by welding; The inner ring of the ball bearing is fixedly connected to the roller support shaft (22) by welding or interference fit; The lower part of the limiting block (24) is fixedly connected to the bracket (21) by welding and is located between the two roller support shafts (22).

8. The narrow-channel impeller weld penetration testing fixture according to claim 1, characterized in that: The chassis (1) is provided with a weight-reducing groove (11) to reduce the weight of the chassis (1).

9. The penetrant testing fixture for narrow-channel impeller welds according to claim 7, characterized in that: The upper support (31), lower support (32), limiting block (24) and chassis (1) are all made of steel.

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