A welding joint test device for nuclear capacitors

Abstract

The present invention relates to the technical field of test devices, and provides a welding joint test device for a nuclear capacitor, comprising a clamp body, a clamping mechanism, a positioning mechanism and a driving mechanism; a fixing portion is formed on the first side of the top of the clamp body, a clamp body crescent groove is opened on the top of the fixing portion, and a guide hole and a positioning hole are opened on the clamp body; the clamping mechanism comprises a splint and a guide assembly, a splint crescent groove is opened on the top of the splint, the guide assembly comprises a guide shaft and a first compression spring, the guide shaft is slidably connected to the inner wall of the guide hole, the guide shaft is also fixedly connected to the splint, and the first compression spring is sleeved on the guide shaft; there are two positioning mechanisms, and the two positioning mechanisms are symmetrically arranged, the positioning mechanism comprises a slider, a positioning shaft and a second compression spring, the slider is slidably connected to the inner wall of the positioning hole, the first end of the positioning shaft is fixedly connected to the slider, and the second compression spring is sleeved on the positioning shaft; the driving mechanism is used to control the guide shaft to move in the guide hole, and can also control the two positioning shafts to move synchronously in opposite directions in the positioning holes.

Description

Technical Field

[0001] The invention relates to the technical field of test devices, and in particular to a welding joint test device for a nuclear capacitor. Background Art

[0002] The welding joints of nuclear capacitors need to be subjected to bending tests before assembly to ensure that the manufactured nuclear capacitors meet safety standards. The bending test is an important test to inspect the integrity and plasticity of the welding joints, and is also one of the important indicators for whether the welding joints are qualified.

[0003] The transverse bend test of welded joint specimens requires that the weld center of the weld joint specimen be located at the center between the two rollers of the tensile testing machine, and the bending axis of the tensile testing machine's indenter should also be aligned with the weld center. Due to the limitations of the tensile testing machine's lead screw and optical bar, which partially obstruct the tester's line of sight, the weld center of the weld joint specimen cannot be accurately located at the center between the two rollers of the tensile testing machine. It is also difficult to confirm whether the bending axis of the indenter is aligned with the weld center, resulting in centering errors, which directly affect the test results of the transverse bend test. Summary of the Invention

[0004] In response to the defects in the prior art, the purpose of the present invention is to provide a welding joint testing device for nuclear capacitors, so that the weld center of the welding joint sample can be accurately located at the center position between the two rollers of the tensile testing machine, and at the same time the bending axis of the pressure head can be aligned with the weld center of the welding joint sample.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions: A welding joint testing device for nuclear capacitors, comprising a clamp body, a clamping mechanism, a positioning mechanism and a driving mechanism;

[0006] An upwardly protruding fixing portion is formed on a first side of the top of the pliers body, a downwardly extending crescent groove of the pliers body is formed on the top of the fixing portion, and a guide hole and a positioning hole are formed on the pliers body that pass through in a horizontal direction, and the extension directions of the guide hole and the positioning hole are perpendicular to each other;

[0007] The clamping mechanism includes a clamping plate and a guide assembly, the clamping plate is arranged on the second side of the clamp body, the top of the clamping plate is provided with a clamping plate crescent groove extending downward, the clamping plate crescent groove has the same specifications as the clamp body crescent groove, and the connection line of the center lines of the two is located on the central axis of the clamp body, the clamping plate, the clamp body and the fixing part jointly form a limiting groove, and the limiting groove is used to place the welding joint sample, the guide assembly includes a guide shaft and a first compression spring, the guide shaft is arranged in the guide hole and is slidably connected to the inner wall of the guide hole, the guide shaft is also fixedly connected to the clamping plate, the first compression spring is sleeved on the guide shaft, and the first compression spring makes the clamping plate have a tendency to approach the fixing part;

[0008] There are two positioning mechanisms, which are symmetrically arranged on both sides of the interior of the positioning hole. The positioning mechanism includes a slider, a positioning shaft and a second compression spring. The slider is arranged in the positioning hole and is slidably connected to the inner wall of the positioning hole. The first end of the positioning shaft is fixedly connected to the slider, and the end face of the second end of the positioning shaft is a vertical surface and extends outward. The second compression spring is sleeved on the positioning shaft, and the second compression spring makes the slider have a tendency to move inward;

[0009] The driving mechanism is used to control the guide shaft to move in the guide hole, and can also control the two positioning shafts to move synchronously in opposite directions in the positioning holes.

[0010] Furthermore, a receiving groove extending inward is formed on the side wall of the caliper body, the receiving groove is connected to the positioning hole, and a first guide surface is formed on the inner side surface of the two sliders, which is inclined downward and extends outward, and the inner end surface thereof is a vertical surface;

[0011] The driving mechanism includes a pusher claw, a pressure block, a U-shaped rod and a push rod. The middle part of the pusher claw is rotatably connected to the caliper body. The pressure block is fixedly mounted on the first end of the pusher claw. A second guide surface that is downwardly inclined and extends inward is formed on both side surfaces of the pressure block. The second guide surface contacts and adapts to the first guide surface on the same side. Both ends of the U-shaped rod are fixedly connected to the splint. The push rod is arranged in the U-shaped rod and fixedly connected to the pusher claw.

[0012] Furthermore, a handle is provided above the second end of the pusher claw, and the handle is fixedly connected to the pliers body.

[0013] Furthermore, a first pair of center lines is engraved on the middle of the crescent groove of the splint, and a second pair of center lines is engraved on the middle of the crescent groove of the clamp body.

[0014] Furthermore, the distance from the lowest point of the crescent groove of the clamp body to the top of the clamp body is equal to the thickness of the weld joint sample.

[0015] Furthermore, the inclination of the first guide surface and the second guide surface are both 45°.

[0016] Furthermore, the number of the guide holes is two and they are respectively located on both sides of the caliper body, and the number of the guide assemblies is two and they are respectively arranged in the two guide holes.

[0017] Beneficial effects of the present invention: The present invention provides a welding joint testing device for nuclear capacitors. When in use, the welding joint sample is first placed into the limiting groove, and the weld center of the welding joint sample is aligned with the middle of the crescent groove of the clamp body and the crescent groove of the clamp plate. The welding joint sample is then clamped by the clamping mechanism. The two positioning shafts are then controlled to move outward synchronously by the driving mechanism. When the end faces of the second ends of the two positioning shafts contact the end faces of the roller supports, the weld center of the welding joint sample is exactly located on the center line of the two rollers. At this time, the centering positioning is completed. Finally, the bending center axis of the pressure head is aligned with the weld center of the welding joint sample. Therefore, the present device can accurately position the weld center of the welding joint sample at the center position between the two rollers of the tensile testing machine, and at the same time, the bending center axis of the pressure head can be aligned with the weld center of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the present invention;

[0019] Figure 2 for Figure 1 Left view

[0020] Figure 3 for Figure 1 Top view of .

[0021] Figure markings: 10-pressure head, 20-tensile testing machine, 21-roller, 22-roller support, 30-clamp body, 31-guide hole, 32-positioning hole, 33-limiting groove, 34-clamp body crescent groove, 35-second pair of center lines, 36-accommodating groove, 37-fixing part, 40-clamping mechanism, 41-splint, 42-guide assembly, 421-guide shaft, 422-first compression spring, 423-pressure nut, 44-splint crescent groove, 45-first pair of center lines, 50-positioning mechanism, 51-slider, 52-positioning shaft, 53-second compression spring, 54-internal thread clamping cover, 60-driving mechanism, 61-push claw, 62-pressure block, 621-guide key, 63-U-shaped rod, 64-push rod, 65-pin shaft, 66-handle, 70-weld joint specimen. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] In this application, unless otherwise specified or limited, the terms "connect" and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0024] In the description of this application, it should be understood that the terms "longitudinal", "transverse", "horizontal", "top", "bottom", "up", "down", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0025] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present invention, "plurality" means more than two, unless otherwise specifically defined.

[0026] like Figure 1-3 As shown, the present invention provides a nuclear capacitor weld joint testing device, which is used in conjunction with a press head 10 and a tensile testing machine 20. The press head 10 and the tensile testing machine 20 are prior art, and their specific structures are not described here. The device includes a clamp body 30, a clamping mechanism 40, a positioning mechanism 50, and a driving mechanism 60.

[0027] An upwardly protruding fixing portion 37 is formed on a first side of the top of the pliers body 30, and a downwardly extending crescent groove 34 is formed at the top of the fixing portion 37. A horizontally extending guide hole 31 is formed in the upper portion of the pliers body 30, and a horizontally extending positioning hole 32 is formed in the lower portion of the pliers body 30. The guide hole 31 and the positioning hole 32 extend perpendicularly to each other.

[0028] The clamping mechanism 40 includes a splint 41 and a guide assembly 42. The splint 41 is arranged on the second side of the pliers body 30. A splint crescent groove 44 extending downward is provided on the top of the splint 41. The splint crescent groove 44 is exactly the same as the pliers body crescent groove 34 in size, shape, height and other specifications, and the line connecting the center lines of the two is located on the central axis of the pliers body 30. A limiting groove 33 is formed between the splint 41, the pliers body 30 and the fixing portion 37. The limiting groove 33 is used to place the welding joint sample 70. The guide assembly 42 includes a guide shaft 421 and a first compression spring 422. The guide shaft 421 is arranged in the guide hole 31 along the horizontal direction and is slidably connected to the inner wall of the guide hole 31. The first end of the guide shaft 421 is fixedly connected to the splint 41, and the second end of the guide shaft 421 is provided with a clamping nut 423. The first compression spring 422 is sleeved on the guide shaft 421 , the first end of the first compression spring 422 contacts the clamping nut 423 , and the second end of the first compression spring 422 is fixedly connected to the inner wall of the guide hole 31 . The first compression spring 422 makes the clamp 41 tend to approach the fixing portion 37 .

[0029] There are two positioning mechanisms 50, and the two positioning mechanisms 50 are symmetrically arranged on both sides of the interior of the positioning hole 32. The positioning mechanism 50 includes a slider 51, a positioning shaft 52, and a second compression spring 53. The slider 51 is arranged in the positioning hole 32 and is slidably connected to the inner wall of the positioning hole 32. The first end of the positioning shaft 52 is fixedly connected to the slider 51, and the end face of the second end of the positioning shaft 52 is a vertical surface and extends outward. The second end of the positioning shaft 52 is sleeved with an internal threaded clamping cover 54. The second compression spring 53 is sleeved on the positioning shaft 52, and the first end of the second compression spring 53 is in contact with the internal threaded clamping cover 54, and the second end of the second compression spring 53 is in contact with the slider 51. The second compression spring 53 makes the slider 51 tend to move inward.

[0030] The driving mechanism 60 is used to control the guide shaft 421 to move in the guide hole 31 , and can also control the two positioning shafts 52 to move synchronously in opposite directions in the positioning holes 32 .

[0031] In the initial state: ①. The inner vertical surfaces of the two sliders 51 are in contact and fit together, and the cutting edge formed by this vertical surface and the second guide surfaces on both sides of the pressure block 62, as well as the first pair of center lines 45 and the second pair of center lines 35 are on the same plane and are exactly located on the central axis of the pliers body 30. ②. The splint crescent groove 44 is at the same height as the pliers body crescent groove 34, and the first pair of center lines 45 and the second pair of center lines 35 are in a straight line. ③. The pusher claw 61 is not subjected to external force, the inner vertical surfaces of the two sliders 51 are in contact and fit together, and the pusher rod 64 is in contact with the U-shaped rod 63. (The function is to reduce the operating clearance of the drive mechanism 60, making the operation of the drive mechanism 60 more flexible).

[0032] The specific usage process is: first, the staff controls the guide shaft 421 to move in the guide hole 31 through the driving mechanism 60. At this time, the splint 41 moves outward. The staff puts the welding joint sample 70 into the limiting groove 33 and aligns the weld center of the welding joint sample 70 with the middle of the clamp body crescent groove 34 and the splint crescent groove 44.

[0033] Then, the staff controls the driving mechanism 60 to reset, and the welding joint sample 70 will be clamped by the clamping plate 41 under the action of the first compression spring 422 .

[0034] Subsequently, the device with the weld joint sample 70 sandwiched therebetween is placed between the two roller supports 22 , and the surface of the weld joint sample 70 is brought into contact with the two rollers 21 .

[0035] Next, the staff controls the two positioning shafts 52 to move outward synchronously through the driving mechanism 60. When the end faces of the second ends of the two positioning shafts 52 contact the end faces of the roller supports 22, the weld center of the weld joint specimen 70 is exactly located on the center lines of the two rollers 21 of the tensile testing machine 20. At this time, the centering positioning is completed.

[0036] Next, the operator controls the movement of the indenter 10 so that the bending axis of the indenter 10 is aligned with the center of the weld of the welded joint specimen 70. Therefore, the present device can accurately position the weld center of the welded joint specimen 70 at the center between the two rollers 21 of the tensile testing machine 20, while also aligning the bending axis of the indenter 10 with the weld center of the welded joint specimen 70.

[0037] Finally, the pressure head 10 presses downward into the jaw body crescent groove 34 and the clamp plate crescent groove 44 to pre-tighten the weld joint specimen 70. The operator controls the drive mechanism 60 to reset, and the positioning shaft 52 is reset under the action of the second compression spring 53. The operator again controls the guide shaft 421 to move within the guide hole 31 through the drive mechanism 60, and the clamp plate 41 moves outward. At this time, the weld joint specimen 70 is separated from the device and the jaw body 30 is removed. At this point, the centering work is complete, and the bending test of the weld joint specimen 70 can begin. The entire process is easy to operate, and the centering is accurate and efficient.

[0038] In one embodiment, an inwardly extending receiving groove 36 is formed on the side wall of the caliper body 30, and the receiving groove 36 is connected to the positioning hole 32. The inner side surfaces of the two sliders 51 are each formed with a first guide surface that is inclined downward and extends outward, and the inner end thereof is a vertical surface.

[0039] In the initial state, the inner vertical surfaces of the two sliders 51 are in contact and aligned, precisely aligned with the central axis of the caliper body 30. A guide key 621 is provided on the lower portion of the slider 51, and a matching guide groove is provided in the positioning hole 32. The guide key 621 serves to limit the rotational freedom of the slider 51, ensuring smooth sliding of the slider 51 within the positioning hole 32 and preventing it from getting stuck.

[0040] The drive mechanism 60 comprises a pusher claw 61, a pressure block 62, a U-shaped rod 63, and a push rod 64. The center of the pusher claw 61 is rotatably connected to the caliper body 30 via a pin 65. The pressure block 62 is fixedly mounted at the first end of the pusher claw 61. Both sides of the pressure block 62 are formed with downwardly inclined, inwardly extending second guide surfaces, which contact and conform to the first guide surfaces on the same side. Both ends of the U-shaped rod 63 are fixedly connected to the clamping plate 41. The push rod 64 is disposed within the U-shaped rod 63 and fixedly connected to the pusher claw 61.

[0041] The staff presses the push claw 61 downward, and under the action of the pin 65 and the lever force, the push rod 64 will pull the U-shaped rod 63 outward, thereby moving the splint 41 outward to facilitate placing the weld joint sample 70 into the limit groove 33, or separating the weld joint sample 70 from the device after the pressure head 10 is pre-tightened.

[0042] The staff presses the pusher claw 61 upward, and under the action of the pin shaft 65 and the lever force, the pressure block 62 will move downward. With the cooperation of the first guide surface and the second guide surface, the two positioning shafts 52 will move outward synchronously and with the same displacement until the end faces of the second ends of the two positioning shafts 52 contact the end face of the roller support 22.

[0043] The driving mechanism 60 has a simple structure. The operator can control the operation of the clamping mechanism 40 and the positioning mechanism 50 by controlling the up and down movement of the pusher claw 61, which is convenient for operation and use.

[0044] In one embodiment, a handle 66 is provided above the second end of the pusher claw 61, and the handle 66 is fixedly connected to the pliers body 30. The handle 66 is used in conjunction with the pusher claw 61 to further facilitate operation by the staff.

[0045] In one embodiment, a first pair of center lines 45 is engraved in the middle of the plate crescent groove 44, and a second pair of center lines 35 is engraved in the middle of the jaw body crescent groove 34. The first center line and the second center line can respectively indicate the center lines of the plate crescent groove 44 and the jaw body crescent groove 34, making it easier for workers to quickly and accurately align the weld center of the weld joint specimen 70 with the middle of the jaw body crescent groove 34 and the plate crescent groove 44.

[0046] In one embodiment, the distance from the lowest point of the jaw body crescent groove 34 and the jaw plate crescent groove 44 to the top of the jaw body 30 is equal to the thickness of the weld joint specimen 70, and both are machined to a negative deviation. This allows the press head 10 to achieve a better compression effect when pre-compacting the weld joint specimen 70, achieving a labor-saving effect.

[0047] The curved radius of the plate crescent groove 44 and the jaw body crescent groove 34 is consistent with the curved radius of the ram 10. This facilitates the positioning of the ram 10 by simply placing the ram 10 into the plate crescent groove 44 and the jaw body crescent groove 34. Since the distance from the lowest point of the jaw body crescent groove 34 and the plate crescent groove 44 to the top of the jaw body 30 is equal to the thickness of the weld joint specimen 70, the ram 10 is in contact with the center surface of the weld seam of the specimen 70. The negative deviation of the dimensions is designed to provide a certain guiding effect during pre-tightening. Only a small amount of force is required to completely fit the ram 10 against the plate crescent groove 44 and the jaw body crescent groove 34, and neither the ram 10 nor the weld joint specimen 70 will be displaced or out of position. The entire process can be performed blindly.

[0048] In one embodiment, the inclination of the first guide surface and the second guide surface are both 45°.

[0049] In one embodiment, there are two guide holes 31 , which are located on both sides of the caliper body 30 , and there are two guide assemblies 42 , which are respectively disposed in the two guide holes 31 , so that the clamping mechanism 40 can work more stably.

[0050] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be regarded as illustrative and non-restrictive in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description, and all changes that come within the meaning and range of equivalents of the claims are intended to be included therein.

[0051] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A welding joint test device for nuclear capacitors, characterized by: It includes a clamp body, a clamping mechanism, a positioning mechanism and a driving mechanism; An upwardly protruding fixing portion is formed on a first side of the top of the pliers body, a downwardly extending crescent groove of the pliers body is formed on the top of the fixing portion, and a guide hole and a positioning hole are formed on the pliers body that pass through in a horizontal direction, and the extension directions of the guide hole and the positioning hole are perpendicular to each other; The clamping mechanism includes a clamping plate and a guide assembly, the clamping plate is arranged on the second side of the clamp body, the top of the clamping plate is provided with a clamping plate crescent groove extending downward, the clamping plate crescent groove has the same specifications as the clamp body crescent groove, and the connection line of the center lines of the two is located on the central axis of the clamp body, the clamping plate, the clamp body and the fixing part jointly form a limiting groove, and the limiting groove is used to place the welding joint sample, the guide assembly includes a guide shaft and a first compression spring, the guide shaft is arranged in the guide hole and is slidably connected to the inner wall of the guide hole, the guide shaft is also fixedly connected to the clamping plate, the first compression spring is sleeved on the guide shaft, and the first compression spring makes the clamping plate have a tendency to approach the fixing part; There are two positioning mechanisms, which are symmetrically arranged on both sides of the interior of the positioning hole. The positioning mechanism includes a slider, a positioning shaft and a second compression spring. The slider is arranged in the positioning hole and is slidably connected to the inner wall of the positioning hole. The first end of the positioning shaft is fixedly connected to the slider, and the end face of the second end of the positioning shaft is a vertical surface and extends outward. The second compression spring is sleeved on the positioning shaft, and the second compression spring makes the slider have a tendency to move inward; The driving mechanism is used to control the guide shaft to move in the guide hole, and can also control the two positioning shafts to move synchronously in opposite directions in the positioning holes.

2. The welding joint testing device for a nuclear capacitor according to claim 1, characterized in that: An inwardly extending receiving groove is formed on the side wall of the caliper body, the receiving groove is communicated with the positioning hole, and a first guide surface is formed on the inner side surface of each of the two sliders, which is inclined downward and extends outward, and the inner end surface thereof is a vertical surface; The driving mechanism includes a pusher claw, a pressure block, a U-shaped rod and a push rod. The middle part of the pusher claw is rotatably connected to the caliper body. The pressure block is fixedly mounted on the first end of the pusher claw. A second guide surface that is downwardly inclined and extends inward is formed on both side surfaces of the pressure block. The second guide surface contacts and adapts to the first guide surface on the same side. Both ends of the U-shaped rod are fixedly connected to the splint. The push rod is arranged in the U-shaped rod and fixedly connected to the pusher claw.

3. The welding joint testing device for a nuclear capacitor according to claim 2, characterized in that: A handle is provided above the second end of the pusher claw, and the handle is fixedly connected to the pliers body.

4. The welding joint testing device for a nuclear capacitor according to claim 1, characterized in that: A first pair of center lines is engraved on the middle of the crescent groove of the splint, and a second pair of center lines is engraved on the middle of the crescent groove of the clamp body.

5. The welding joint testing device for a nuclear capacitor according to claim 1, characterized in that: The distance from the lowest point of the crescent groove of the clamp body to the top of the clamp body is equal to the thickness of the weld joint sample.

6. The welding joint testing device for a nuclear capacitor according to claim 2, characterized in that: The inclination of the first guide surface and the second guide surface are both 45°.

7. The welding joint testing device for a nuclear capacitor according to claim 1, characterized in that: There are two guide holes, which are respectively located on both sides of the caliper body; there are two guide assemblies, which are respectively arranged in the two guide holes.

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