Tool clamp for heat exchanger detection

Abstract

The utility model provides a tool clamp for detecting a heat exchanger, which relates to the technical field of heat exchanger detection and comprises a clamp base, a first cylinder, a second cylinder, a third cylinder and a fourth cylinder. The clamp body is arranged at the top of the clamp base and used for clamping the heat exchanger; the push plate is located between the vertical plate and the clamp body, one end of the push plate is fixedly connected with a piston rod of the first air cylinder, and the other end of the push plate is provided with a sealing rod connected with the heat exchanger in an inserted mode. The supporting plate is arranged at the bottom of the clamp base, a second air cylinder with a limiting rod is arranged on the supporting plate, a through hole for the limiting rod to pass through is formed in the clamp base, and a fixing hole matched with the limiting rod is formed in the push plate. The push plate is limited through the limiting rod, so that the problem that the push plate is displaced due to self-expansion during inflation detection of the heat exchanger can be avoided, and the expanded heat exchanger can be stably supported without replacing an air cylinder with a larger cylinder diameter on the tool clamp.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchanger detection, in particular to a tooling fixture for heat exchanger detection. Background Art

[0002] Before the heat exchanger is used in the factory, in order to ensure its quality of use, it is necessary to inflate the inside of the heat exchanger for testing, that is, helium testing of the heat exchanger. During the heat exchanger testing process, a fixture is usually used to clamp the heat exchanger to assist in completing the helium testing. The specific helium testing process is as follows: the staff pushes the piston rod through the cylinder on the fixture to insert the sealing rod connected to the free end of the piston rod through the push plate into the opening of the heat exchanger. Then, after the heat exchanger is installed in the limit fixture, the helium testing of the heat exchanger begins. During the testing process, the heat exchanger is inflated, which will give the sealing rod a gradually increasing thrust. After the sealing rod is stressed, it will be fed back to the cylinder on the fixture through the push plate. The cylinder needs to offset the thrust transmitted by the sealing rod in turn to prevent the heat exchanger in the limit fixture from failing to complete the helium testing normally after the sealing rod is displaced. After the helium testing is completed, the cylinder drives the push plate through the piston rod to remove the sealing rod from the heat exchanger to facilitate the helium testing of the next heat exchanger.

[0003] During the helium detection process of the above-mentioned heat exchanger, the high-pressure sealing rod inserted in the heat exchanger will be squeezed due to the expansion of the heat exchanger, thereby squeezing the cylinder on one side. If the high-pressure sealing rod is not squeezed and forced to move after the heat exchanger is inflated, it is necessary to increase the cylinder diameter of the first cylinder. However, the increase in the cylinder diameter will cause the tooling fixture to occupy more space, which not only increases the cost, but also compresses the operating space of the tooling fixture. Utility Model Content

[0004] In order to solve the problem that when the heat exchanger is subjected to helium testing, the heat exchanger expands and causes the tooling fixture to be displaced, thereby affecting the product quality testing of the heat exchanger, the utility model provides a tooling fixture for a heat exchanger. When the heat exchanger is subjected to inflation testing, the setting of a limit rod prevents the heat exchanger from inflating and expanding and causing the supporting sealing rod to be displaced, thereby making it unnecessary to replace the cylinder used for the support with a cylinder with a larger cylinder diameter in the tooling fixture, thereby reducing costs and not compressing the operating space of the tooling fixture.

[0005] The technical solution adopted by the utility model is:

[0006] A heat exchanger inspection fixture is provided, comprising:

[0007] A fixture base, a vertical plate is vertically provided on the top of which a first cylinder with a piston rod is provided;

[0008] A clamp body, disposed on the top of the clamp base, for clamping the heat exchanger;

[0009] A push plate is located between the vertical plate and the fixture body, one end of the push plate is fixedly connected to the piston rod of the first cylinder, and the other end is provided with a sealing rod plugged into the heat exchanger;

[0010] The support plate is arranged at the bottom of the clamp base, a second cylinder with a limiting rod is arranged on the support plate, a through hole for the limiting rod to pass through is opened on the clamp base, and a fixing hole matched with the limiting rod is opened on the push plate.

[0011] In some embodiments of the utility model, a slide bar is provided on the top of the clamp base, the slide bar is located between the push plate and the clamp base, a slider is slidably connected to the slide bar, and the slider is fixedly connected to the push plate.

[0012] In some embodiments of the utility model, the push plate includes a transverse plate, a first connecting plate and a second connecting plate. A fixing hole is provided on the transverse plate. The transverse plate is in sliding contact with the slider. The top of the transverse plate is respectively provided with limiting grooves matching the first connecting plate and the second connecting plate. The first connecting plate is fixedly connected to the piston rod of the first cylinder, and the second connecting plate is connected to the sealing rod.

[0013] In some embodiments of the utility model, an opening is formed on the top of the second connecting plate from top to bottom, the sealing rod is slidably connected in the opening, and a limiting ring is formed on the outer side wall of the sealing rod.

[0014] In some embodiments of the present invention, there are two limit rods and two fixing holes, and the sliding block is located between the two limit rods.

[0015] In some embodiments of the present invention, the vertical plate is an L-shaped vertical plate, and reinforcing ribs are provided on the vertical plate.

[0016] The beneficial effects of the utility model are:

[0017] When the heat exchanger is inflated for testing, it expands itself, causing the sealing rod sealed on the heat exchanger to move along the expansion direction of the heat exchanger. The force on the sealing rod is applied to the first cylinder through the push plate, which causes the piston rod on the first cylinder to move toward the cylinder. At this time, the limit rod in the second cylinder on the support plate is pushed out and passes through the through hole on the fixed plate and the fixed hole on the push plate in turn, so that the limit rod can limit the push plate. There is no need to replace the first cylinder used for supporting the limit, which saves costs and does not compress the operating space of the tooling fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A three-dimensional diagram of a fixture for testing a heat exchanger;

[0020] Figure 2 This is a front view of a fixture for testing a heat exchanger;

[0021] Figure 3 A three-dimensional diagram of a fixture body in a fixture for testing a heat exchanger;

[0022] Figure 4 This is a three-dimensional view of the push plate in the tooling fixture for heat exchanger inspection.

[0023] Reference numerals:

[0024] 1- fixture base, 10- through hole, 2- vertical plate, 20- first motor, 21- piston rod, 22- reinforcing rib, 3- fixture body, 30- workpiece stopper, 31- heat exchanger, 4- push plate, 40- opening, 41- sealing rod, 42- limiting ring, 43- fixing hole, 44- horizontal plate, 45- first connecting plate, 46- second connecting plate, 47- limiting groove, 5- support plate, 50- second cylinder, 51- limiting rod, 6- slide bar, 7- slide block. DETAILED DESCRIPTION

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0027] The embodiments of the utility model will be described in detail below with reference to the accompanying drawings.

[0028] Embodiment, as Figure 1-4 shown, this embodiment provides a fixture for detecting a heat exchanger 31, including:

[0029] A fixture base 1, on the top of which a vertical plate 2 is provided, and a first cylinder with a piston rod 21 is provided on the vertical plate 2;

[0030] A fixture body 3, which is arranged on the top of the fixture base 1 and is used for clamping the heat exchanger 31;

[0031] A push plate 4, which is located between the vertical plate 2 and the fixture body 3. One end of the push plate 4 is fixedly connected to the piston rod 21 of the first cylinder, and the other end is provided with a sealing rod 41 inserted into the heat exchanger 31;

[0032] A support plate 5, which is arranged at the bottom of the fixture base 1. A second cylinder 50 with a limiting rod 51 is provided on the support plate 5. A through hole 10 for the limiting rod 51 to pass through is opened on the fixture base 1, and a fixing hole 43 adapted to the limiting rod 51 is opened on the push plate 4.

[0033] The fixture body 3 and the vertical plate 2 are respectively located at both ends of the top surface of the fixture base 1, and are both fixedly connected to the fixture base 1 by bolts. The fixture body 3 is composed of a bottom plate and a plurality of workpiece stoppers 30, and is used for clamping and fixing the heat exchanger 31. The first cylinder is fixedly connected to the vertical plate 2 by bolts, and the piston rod 21 on the first cylinder faces the side of the fixture body 3 and penetrates through the vertical plate 2. In the embodiment of the present utility model, the whole push plate 4 is in a U-shaped structure, its opening 40 faces upward, the bottom of the push plate 4 faces the fixture base 1, and the side plates on both sides are respectively connected to the piston rod 21 of the first cylinder and the sealing rod 41 inserted into the heat exchanger 31. There is no gap between the push plate 4 and the fixture base 1, that is, the push plate 4 is in sliding contact with the fixture base 1, which improves the support stability of the first cylinder for the sealing rod 41 and is also convenient for the matching between the limiting rod 51 and the fixing hole 43.

[0034] When in use, the staff inserts the free end of the sealing rod 41 into the heat exchanger 31, puts the heat exchanger 31 into the clamp body 3 for clamping, and after the heat exchanger 31 is clamped stably, the limiting rod 51 is pushed out by the second cylinder 50, so that the limiting rod 51 first passes through the through hole 10 opened on the clamp base 1, and then enters the fixed hole 43 on the push plate 4, so as to limit the push plate 4 from being able to move along the radius direction of the limiting rod 51. Then, the helium test of the heat exchanger 31 is started. During the test, the heat exchanger 31 will be inflated, and the sealing rod 41 plugged into the heat exchanger 31 will be subjected to the thrust brought by the expanded heat exchanger 31. In order to prevent the sealing rod 41 from being pushed open and displaced, the piston rod 21 on the first cylinder will support and stabilize the sealing rod 41 through the connected push plate 4 to prevent the sealing rod 41 from being further displaced. When the air volume in the heat exchanger 31 increases, the thrust exerted on the sealing rod 41 will also increase. If the bore of the first cylinder is small, it will be difficult to provide stable support to the sealing rod 41 through the push plate 4. It is necessary to increase the bore of the first cylinder to continue to provide stable support to the sealing rod 41. This will increase costs and reduce the operable space of the fixture. Therefore, the second cylinder 50 provided at the bottom of the fixture base 1 can prevent the push plate 4 from being pushed after the limit rod 51 passes through the fixing hole 43 on the push plate 4, thereby achieving the support and limiting effect on the heat exchanger 31 without replacing the first cylinder. After the helium detection of the heat exchanger 31 is completed, the limiting rod 51 is first retracted from the fixing hole 43 on the push plate 4 by the second cylinder 50, and then retracted from the through hole 10 on the clamp base 1 to the bottom of the clamp base 1, and then the piston rod 21 is adjusted to retract back by the first cylinder, and the piston rod 21 moves the push plate 4, and the push plate 4 removes the sealing rod 41 from the plug-in position on the heat exchanger 31. No manual intervention is required by the staff. After the sealing rod 41 is taken out, the heat exchanger 31 can be removed from the clamp body 3.

[0035] Further, such as Figure 1 and Figure 2 As shown, a slide bar 6 is provided on the top of the clamp base 1 , and the slide bar 6 is located between the push plate 4 and the clamp base 1 . A slider 7 is slidably connected to the slide bar 6 , and the slider 7 is fixedly connected to the push plate 4 .

[0036] In this embodiment, the length of the slide bar 6 is longer than that of the push plate 4, and the length of the slider 7 is shorter than that of the push plate 4. The cross section of the slide bar 6 is a T-shaped structure, and the slider 7 is slidably connected to the slide bar 6 by slotting at its bottom, and the top of the slider 7 is fixedly connected to the push plate 4 by bolts, so that the first cylinder plays a role of stabilizing and guiding when pushing and pulling the push plate 4 through the piston rod 21.

[0037] When in use, the first cylinder operates to drive the piston rod 21 to extend and retract, and the piston rod 21 drives the push plate 4 to push and pull, which is conducive to the piston rod 21 inserting the sealing rod 41 into the heat exchanger 31 through the push plate 4 to play a guiding role.

[0038] Further, such as Figure 3 As shown, the push plate 4 includes a transverse plate 44, a first connecting plate 45 and a second connecting plate 46, a fixing hole 43 is provided on the transverse plate 44, the transverse plate 44 is in sliding contact with the slider 7, and the top of the transverse plate 44 is respectively provided with limiting grooves 47 adapted to the first connecting plate 45 and the second connecting plate 46, the first connecting plate 45 is fixedly connected to the piston rod 21 of the first cylinder, and the second connecting plate 46 is connected to the sealing rod 41.

[0039] After the push plate 4 is split into three parts, the horizontal plate 44 is fixedly connected to the slider 7 by bolts, the first connecting plate 45 is fixedly connected to the piston rod 21 on the first cylinder, the second connecting plate 46 is fixedly connected to the sealing rod 41, and the fixing hole 43 is opened on the horizontal plate 44. In this embodiment, the first connecting plate 45 and the second connecting plate 46 are located at both ends of the horizontal plate 44, and are respectively perpendicular to the horizontal plate 44, and the horizontal plate 44 and the fixture base 1 are parallel to each other, and the limiting groove 47 corresponds to the contact position between the first connecting plate 45 and the second connecting plate 46 and the horizontal plate 44, so that the limiting groove 47 can prevent the first connecting plate 45 and the second connecting plate 46 from being relatively displaced on the horizontal plate 44 and between the horizontal plate 44, and compared with the push plate 4 in which the horizontal plate 44 and the first connecting plate 45 and the second connecting plate 46 are integrally formed, the service life is long, and when damaged, there is no need to replace the push plate 4 as a whole, thereby reducing cost consumption. In addition, the first connecting plate 45 and the piston rod 21 on the first cylinder may be connected via a flange, so that the first connecting plate 45 or the first cylinder can be replaced in time if there is any problem.

[0040] When in use, after the helium detection of the heat exchanger 31 is completed, the piston rod 21 on the first cylinder pushes and pulls the first connecting plate 45, and the first connecting plate 45 drives the cross plate 44 to move through the position where its own side wall contacts the inner side wall of the limiting groove 47, and the cross plate 44 drives the second connecting plate 46 to move through the position where the inner side wall of another limiting groove 47 contacts the side wall of the second connecting plate 46, so that the second connecting plate 46 pulls out the sealing rod 41 plugged into the heat exchanger 31. It is worth noting that the first connecting plate 45 and the second connecting plate 46 will not rotate relative to the cross plate 44, because the slider 7 plays a contact support role for the cross plate 44.

[0041] Further, such as Figure 3As shown, an opening 40 is formed on the top of the second connecting plate 46 from top to bottom, a sealing rod 41 is slidably connected in the opening 40 , and a limiting ring 42 is formed on the outer side wall of the sealing rod 41 .

[0042] In this embodiment, there are two openings 40 in the same direction. There are 2-3 sealing rods 41 in the openings 40, which are selected according to the number of detection port positions on the heat exchanger 31. There are 2 limiting rings 42, and there is a gap between the two limiting rings 42, which is equal to the width of the second connecting plate 46, that is, the two limiting rings 42 can clamp the sealing rod 41 on the opening 40.

[0043] Further, such as Figure 1 and Figure 2 As shown, there are two limit rods 51 and two fixing holes 43 , and the slider 7 is located between the two limit rods 51 .

[0044] When in use, two limit rods 51 and two fixing holes 43 are selected, and there is a one-to-one correspondence between the limit rods 51 and the fixing holes 43, and they are distributed on both sides of the slider 7, so that after the helium detection of the heat exchanger 31 is completed, when the sealing rod 41 is pulled away from the heat exchanger 31, the overall direction is more stable and will not be offset.

[0045] Further, such as Figure 1 As shown, the vertical plate 2 is an L-shaped vertical plate 2 , and a reinforcing rib 22 is provided on the vertical plate 2 .

[0046] When in use, since the first cylinder arranged on the vertical plate 2 will limit the support of the expanded heat exchanger 31 through the piston rod 21, the push plate 4 and the sealing rod 41, a reinforcing rib 22 is arranged on the side of the vertical plate 2 away from the push plate 4 to enhance the supporting stability of the vertical plate 2.

[0047] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. In the absence of conflicts, the embodiments of the present application and the features in the embodiments may be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fixture for testing a heat exchanger, characterized in that: include: A fixture base, a vertical plate is vertically provided on the top of which a first cylinder with a piston rod is provided; A clamp body, arranged on the top of the clamp base, for clamping the heat exchanger; A push plate, located between the vertical plate and the fixture body, one end of the push plate is fixedly connected to the piston rod of the first cylinder, and the other end of the push plate is provided with a sealing rod plugged into the heat exchanger; A support plate is arranged at the bottom of the clamp base, a second cylinder with a limiting rod is arranged on the support plate, a through hole for the limiting rod to pass through is opened on the clamp base, and a fixing hole adapted to the limiting rod is opened on the push plate.

2. The heat exchanger inspection fixture according to claim 1, characterized in that: A slide bar is provided on the top of the clamp base, and the slide bar is located between the push plate and the clamp base. A slider is slidably connected to the slide bar, and the slider is fixedly connected to the push plate.

3. The heat exchanger inspection fixture according to claim 2, characterized in that: The push plate includes a transverse plate, a first connecting plate and a second connecting plate. The fixing hole is opened on the transverse plate. The transverse plate is in sliding contact with the slider. The top of the transverse plate is respectively provided with limiting grooves adapted to the first connecting plate and the second connecting plate. The first connecting plate is fixedly connected to the piston rod of the first cylinder, and the second connecting plate is connected to the sealing rod.

4. The heat exchanger inspection fixture according to claim 3, characterized in that: An opening is formed on the top of the second connecting plate from top to bottom, the sealing rod is slidably connected in the opening, and a limiting ring is formed on the outer side wall of the sealing rod.

5. The heat exchanger inspection fixture according to claim 4, characterized in that: There are two limit rods and two fixing holes, and the sliding block is located between the two limit rods.

6. The heat exchanger inspection fixture according to claim 1, characterized in that: The vertical plate is an L-shaped vertical plate, and reinforcing ribs are arranged on the vertical plate.

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