A vacuum extraction and detection integrated device

Abstract

The present invention discloses an integrated vacuum extraction and detection device, comprising no less than one detection cup, wherein the detection cup comprises an embedded ring and a vent portion with a circular cross-section, the embedded ring and the vent portion are integrally fixedly connected, the embedded ring is used for sealingly sleeved on the outer wall of a heat exchange tube and fixed by interference fit; a vent hole communicated with the embedded ring is provided in the middle of the vent portion, the vent hole is used for connecting an exhaust pipe, a pressure gauge is fixedly connected to the outer periphery of the vent portion, the pressure gauge passes through the vent portion and is communicated with the vent hole, and is used for detecting the gas pressure inside the heat exchange tube connected to the embedded ring, so as to confirm whether the heat exchange tube is leaking; a groove is provided at the end of the embedded ring away from the vent portion, a pressure ring is embedded in the groove, and is used for sealing the end of the embedded ring.

Description

Technical Field

[0001] The invention relates to the field of gas detection, and in particular to a vacuum extraction and detection integrated device. Background Art

[0002] The heat exchange tube is the main component of the heat exchanger. It has high thermal conductivity and good isothermal properties and is called a heat transfer superconductor. For a straight tube heat exchanger, the heat exchange tubes are generally placed on a pair of tube sheets 10 (such as Figure 8 ) When heat exchange tubes are produced, it is inevitable that there will be defective products, such as leakage in heat exchange tubes. Once defective products flow into the market, they will cause many maintenance problems for the equipment using heat exchange tubes, affecting the use of the equipment;

[0003] Currently, there is no mature detection technology on the market that can detect whether the heat exchange tube has a leak before it leaves the factory. The only way to determine whether there is a leak is through the change in the fan current after the equipment is installed. This seriously affects the delivery time of the product, generates a large number of after-sales problems, and increases costs. For this reason, the present invention provides an integrated vacuum extraction and detection device. Summary of the invention

[0004] The purpose of the present invention is to provide a vacuum extraction and detection integrated device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A vacuum extraction and detection integrated device includes at least one detection cup, the detection cup includes an embedded ring and a vent portion with a circular cross-section, the embedded ring and the vent portion are fixedly connected in an integral manner, the embedded ring is used to seal the outer wall of a heat exchange tube and is fixed by an interference fit; a vent hole connected to the embedded ring is provided in the middle of the vent portion, the vent hole is used to connect an exhaust pipe, a pressure gauge is fixedly connected to the outer periphery of the vent portion, the pressure gauge passes through the vent portion and is connected to the vent hole, and is used to detect the gas pressure inside the heat exchange tube connected to the embedded ring, so as to confirm whether the heat exchange tube is leaking; a groove is provided at the end of the embedded ring away from the vent portion, and a pressure ring is embedded in the groove to seal the end of the embedded ring.

[0007] Preferably, it also includes an auxiliary detection device for clamping more detection cups; the auxiliary detection device includes a supporting device, no less than two clamping devices and no less than two adjusting devices, the clamping device is slidably connected to the supporting device, and the adjusting device is movably installed on the supporting device and arranged at intervals with the clamping device.

[0008] Preferably, the supporting device includes a pair of fixed plates, a base plate and a pair of connecting rods, and the two ends of the pair of connecting rods are respectively vertically fixed to the base plate and the fixed plate; the connecting rods are provided with a plurality of adjustment holes, and an auxiliary plate is extended from the side away from the fixed plate, and the auxiliary plate corresponds to the adjustment holes, with one of the fixed plates as the first section and the other fixed plate as the tail end, and the tail end is close to the ground.

[0009] Preferably, the clamping device includes a sliding block and a clamping portion, the sliding block is slidably connected to the outer periphery of the substrate, and the side of the substrate away from the clamping portion is not in contact with the inner wall of the sliding block opposite to it, so that the substrate has space for movement in the inner wall of the sliding block; one end of the sliding block is detachably fixedly connected to the clamping portion, and the other end is rotatably connected to a rotating rod; the clamping portion is arc-shaped to clamp the detection cup.

[0010] Preferably, an isolation plate extends from one side of the sliding block toward the tail end, and the isolation plate is rotatably connected to a gap plate. The gap plate can rotate away from the sliding block, and a roller is fixedly connected to the end near the base plate; the rotating rod is fixedly connected to a limit plate corresponding to the isolation plate, and is attached to the end of the isolation plate, with both ends extending to near the connecting rod, and the limit plate is driven to rotate by the rotating rod to limit the rotation of the gap plate.

[0011] Preferably, the adjusting device includes an adjusting plate, a movable plate and a rotating wheel. The movable plate is L-shaped, one end of which is fixedly connected to an end of the adjusting plate away from the clamping portion, and the other end passes through the auxiliary plate and further extends; the middle part of the side of the movable plate away from the adjusting plate is meshed and connected with the rotating wheel, and the rotating wheel drives the movable plate and the adjusting plate to move along the length direction of the movable plate.

[0012] Preferably, the adjustment plate includes a curved plate and a straight plate fixedly connected, the curved plate is placed between adjacent clamping parts and matches the curvature of the clamping parts, the width of the curved plate gradually decreases away from the substrate, and the straight plate drives the curved plate to slide through the adjustment hole.

[0013] Preferably, fixed rods are slidably connected to both sides of the rotating wheel, the fixed rods are fixedly connected to the auxiliary plate, and a control rod is meshingly connected to the middle of the rotating wheel. The control rod extends toward both ends to be close to the connecting rod and is located on both sides of the straight plate together with the rotating rod.

[0014] Preferably, one end of the control rod faces the head end and is fixedly connected to the turntable, and the other end is rotatably connected to the support plate, the support plate is fixedly connected to the fixed plate, one end of the rotating rod is fixedly connected to the handle, and the other end is rotatably connected to the support plate.

[0015] Preferably, the support plate is rotatably connected with a fastening device, the fastening device includes an abutment portion and an abutment rod, the outer wall of the abutment rod is provided with a thread, which is threadedly connected to the support plate, one end of the abutment rod is fixedly connected with a handle, and the other end passes through the support plate and is fixedly connected to the abutment portion, and the abutment portion is driven close to the abutment sliding block by rotating the abutment rod to abut against both sides of the sliding block, or to move away from the sliding block.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The invention has a simple structure and is easy to operate. The detection cup and the pressure gauge are combined to form a gas detection device. With the pressure ring, the heat exchange tube can be inspected before it leaves the factory. The gas in the heat exchange tube can be extracted by the exhaust pipe to detect gas leakage, thereby ensuring the factory quality and reducing the after-sales cost.

[0018] In conjunction with auxiliary testing devices, batch testing can be performed, taking multiple samples for testing at one time, reducing the time spent on testing one by one and improving testing efficiency;

[0019] Through the cooperation of the adjusting device and the control rod, the rotation of the control rod drives the rotating wheel to rotate, so that the movable plate and the adjusting plate move, thereby separating the adjacent clamping parts to a specified spacing to adapt to different heat exchange tubes; at the same time, the cooperation of the clamping device and the support rod reserves a certain distance for the lateral movement of the sliding block. Through the rotation of the rotating rod, when the base plate is placed vertically, the gap plate can automatically rotate to the lower side, thereby forming a distance for the clamping part to move left and right, so that the detection cup can be flexibly moved when it needs to be aligned with the heat exchange tube, and when alignment is not required, the position can be limited to prohibit the movement of the clamping part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the detection cup of the present invention;

[0021] Figure 2 This is a cross-sectional view of the detection cup of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the auxiliary detection device of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the supporting device of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the regulating device of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the clamping device of the present invention;

[0026] Figure 7 It is a structural schematic diagram of the fastening device of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of the heat exchange tube storage area.

[0028] In the figure: 1 detection cup, 11 embedding ring, 111 pressure ring, 12 ventilation part, 121 ventilation hole, 2 pressure change, 3 adjustment device, 31 adjustment plate, 311 curved plate, 312 straight plate, 32 moving plate, 33 rotating wheel, 4 clamping device, 41 sliding block, 411 isolation plate, 42 clamping part, 43 gap plate, 5 rotating rod, 51 limiting plate, 6 control rod, 7 fastening device, 71 abutment part, 72 abutment rod, 8 supporting device, 81 fixed plate, 82 base plate, 83 connecting rod, 84 supporting plate, 85 adjustment hole, 86 auxiliary plate, 9 auxiliary detection device. DETAILED DESCRIPTION

[0029] Embodiment 1:

[0030] See also Figure 1-8 The present invention provides a technical solution: Figure 1-2 As shown, a vacuum extraction and detection integrated device includes at least one detection cup 1, and the detection cup 1 includes an embedded ring 11 and a vent portion 12 with a circular cross-section. The embedded ring 11 is fixedly connected to the vent portion 12 in an integral manner. The embedded ring 11 is used to seal the outer wall of the heat exchange tube and is fixed by interference fit. A vent hole 121 communicating with the embedded ring 11 is opened in the middle of the vent portion 12, and the vent hole 121 is used to connect the exhaust pipe. A pressure gauge 2 is fixedly connected to the outer periphery of the vent portion 12. The pressure gauge 2 passes through the vent portion 12 and communicates with the vent hole 121, and is used to detect the gas pressure inside the heat exchange tube connected to the embedded ring 11 to confirm whether the heat exchange tube is leaking; a groove is opened at the end of the embedded ring 11 away from the vent portion 11, and a pressure ring 111 is embedded in the groove to seal the end of the embedded ring 11; the detection cup 1 is preferably made of organic glass.

[0031] like Figure 3 As shown, it also includes a vertically placed auxiliary detection device 9 for clamping more detection cups 1 to improve detection efficiency; the auxiliary detection device 9 includes a supporting device 8, no less than two clamping devices 4 and no less than two adjusting devices 3, the clamping device 4 is slidably connected to the supporting device 8, and the adjusting device 3 is movably installed on the supporting device 8 and arranged at intervals with the clamping device 4;

[0032] like Figure 3-6 As shown, the supporting device 8 includes a pair of fixing plates 81, a base plate 82 and a pair of connecting rods 83. One end of the pair of connecting rods 83 is vertically fixedly connected to the base plate 82, and the other end is vertically fixedly connected to the fixing plate 81. The fixing plate 81 is provided with a plurality of connecting holes for fixing with the tube plate 10. The connecting rods 83 are provided with a plurality of adjusting holes 85, and an auxiliary plate 86 is extended from the side away from the fixing plate 81. The auxiliary plate 86 corresponds to the adjusting hole 85. One of the fixing plates 81 is used as the head section, and the other fixing plate 81 is used as the tail end, and the tail end is close to the ground.

[0033] The clamping device 4 includes a sliding block 41 and a clamping portion 42. The sliding block 41 is slidably connected to the outer periphery of the substrate 82. The side of the substrate 82 away from the clamping portion 42 does not fit the inner wall of the sliding block 41 (see Figure 5 ), so that the substrate 82 has a certain movable space in the inner wall of the sliding block 41; the clamping portion 42 is detachably fixedly connected to one end of the sliding block 41, and the other end of the sliding block 41 is rotatably connected to the rotating rod 5. An isolation plate 411 extends from one side of the sliding block 41 toward the tail end, and the isolation plate 411 is rotatably connected to the gap plate 43. The gap plate 43 can be rotated from a direction perpendicular to the substrate 82 to a direction away from the sliding block 41 by gravity, and the end of the gap plate 43 close to the substrate 82 is fixedly connected to a roller; the rotating rod 5 is fixedly connected to a plurality of limit plates 51, and the number of the limit plates 51 is the same as that of the limit plates 51. The isolation plate 411 corresponds to and fits with the end of the isolation plate 411, so that when the limiting plate 51 is driven to rotate and disengage from the isolation plate 411 by the rotating rod 5, and when the base plate 82 is placed vertically, the gap plate 43 loses the limit of the limiting plate 51 and rotates under the action of gravity, so that the gap plate 43 and the base plate 82 are separated, and the clamping part 42 can be driven to move horizontally by operating the sliding block 41. When the limiting plate 51 fits with the isolation plate 411, the sliding block 41 is restricted from moving in the vertical direction of the base plate 82; the clamping part 42 is in an arc shape, so as to use the arc shape to clamp the outer wall of the detection cup 1 (see Figure 3 ); The rotating rod 5 extends to both ends close to the connecting rod 83 to control more limit plates 51;

[0034] The adjusting device 3 includes an adjusting plate 31, a moving plate 32 and a rotating wheel 33. The adjusting plate 31 includes a curved plate 311 and a straight plate 312 that are fixedly connected. The curved plate 311 passes through the adjusting hole 85 and is placed between adjacent clamping portions 42 and matches the curvature of the clamping portions 42. The width of the curved plate 311 gradually decreases in the direction away from the base plate 82. The straight plate 312 drives the curved plate 311 to slide through the adjusting hole 85. The moving plate 32 is L-shaped, one end of which is fixedly connected to the end of the straight plate 312 away from the base plate 82, and the other end passes through the auxiliary plate 86 and further extends. The middle part of the side away from the adjustment plate 31 is meshed with the rotating wheel 33, and the rotation of the rotating wheel 33 drives the movable plate 32 and the adjustment plate 31 to move along the length direction of the movable plate 32, so as to adjust the spacing between adjacent clamping parts 42 by using the gradual change of the span of the curved plate 311; the two sides of the rotating wheel 33 are slidably connected with fixed rods, and the fixed rods are fixedly connected with the auxiliary plate 86, and the middle part of the rotating wheel 33 is meshed with a control rod 6, which extends toward both ends to the position close to the connecting rod 83, so as to control more rotating wheels 33, and is located on both sides of the straight plate 312 with the rotating rod 5;

[0035] like Figure 3-4As shown, one end of the control rod 6 faces the head end and is fixedly connected to a turntable, and the other end is rotatably connected to a support plate 84, and the support plate 84 is fixedly connected to the fixed plate 81. One end of the rotating rod 5 is fixedly connected to a handle, and the other end is rotatably connected to the support plate 84; the support plate 84 provides stable support for the rotating rod 5 and the control rod 6 during rotation;

[0036] like Figure 3 and Figure 7 As shown, the support plate 84 is rotatably connected to the fastening device 7, and the fastening device 7 includes an abutment portion 71 and an abutment rod 72. The outer wall of the abutment rod 72 is provided with a thread for threaded connection with the support plate 84. One end of the abutment rod 72 is fixedly connected to a handle 1, and the other end passes through the support plate 84 and is fixedly connected to the abutment portion 71. The abutment rod 72 is rotated to drive the abutment portion 71 close to the abutment sliding block 41 to abut against the two sides of the sliding block 41, or to move away from the sliding block 41.

[0037] Working principle: the abutting portion 71 is attached to the support plate 84, the curved plate 311 does not contact the clamping portion 32, as the initial state, and one end of the heat exchange tube is sealed; when in use, the fixed plate 81 is placed on the ground, and the rotating rod 5 is rotated so that the limit plate 51 is attached to the gap plate 43, forcing the gap plate 43 to be perpendicular to the base plate 82, and the roller at the end of the gap plate 43 can ensure that the sliding block 41 can slide along the length direction of the base plate 82;

[0038] Confirm the spacing between adjacent vertical heat exchange tubes, rotate the control rod 6, and drive the rotating wheel 33 to rotate through the rotating rod 6. The rotating wheel 33 drives the movable plate 32 and the adjusting plate 31 to move toward the clamping part 42. The width of the curved plate 311 can be used to separate the adjacent clamping parts 42, so that the distance between the adjacent clamping parts is the same as the vertical heat exchange tube spacing. At this time, the clamping part 42 is in contact with the adjacent curved plate 311; turn the handle 1, and drive the abutment part 71 to move toward the adjacent sliding block 41 through the rotation of the abutment rod 72 until the sliding block 41 is abutted to complete the positioning of the clamping part 42; then clamp the detection cup 1 in the clamping part 42. If there are many detection cups 1 and they are piled up together, the fixed plate 81 can be pushed to move toward the accumulation place of the detection cups 1, and the required detection cups 1 can be directly clamped into the clamping part 42 at the same time. With the movement of the base plate 82, the clamping part 42 at the head end may move a certain distance toward the fixed plate 81, which does not need to be processed and will be automatically reset later;

[0039] The base plate 82 holding the detection cup 1 is fixed vertically on the tube plate 10. At this time, the clamping part 42 near the head end will automatically slide downward under the action of gravity and fit the curved plate 311 to complete the automatic reset. The clamping part 42 is located between the adjacent vertical heat exchange tubes, so that the embedded ring 11 of the detection cup 1 has a slight deviation from the corresponding heat exchange tube. Because there is a certain error in the spacing between the heat exchange tubes, the embedded ring 11 cannot be 100% completely matched with the heat exchange tube, and manual alignment is required; taking the base plate 82 as a reference, the left side is toward the clamping part 42, and the right side is toward the straight plate 312, then the pre-detected heat exchange tube is located on the left side of the clamping part 42, and the rotating rod 5 is rotated in the opposite direction to disengage the limit plate 51 from the gap plate 43, and the gap plate 43 automatically moves from the vertical position with the base plate 82. The operator can move the clamping part 42 to the left, and at the same time make the clamping part 42 away from the curved plate 311, so that the clamping part 42 has a certain movable space up and down. In the limited movable space, align the detection cup 1 with the other end of the heat exchange tube, and then sleeve it on the outer wall of the heat exchange tube through interference fit until the pressure ring 111 abuts against the tube sheet 10, which is used for sealing and prevents external gas from entering and affecting the detection effect; the exhaust pipe is sealed and connected to the vent hole to extract the gas inside the heat exchange tube until the vacuum state is reached, and observe whether the pressure gauge 2 changes under the vacuum state. If not, the heat exchange tube does not leak, otherwise it leaks; and so on, sleeve the clamping part 42 on the lower side of the base plate 82 on the other end of the corresponding heat exchange tube for detection;

[0040] Since the heat exchange tubes have different specifications, the spacing can be adjusted by the cooperation between the clamping device 4 and the rotating rod 5, and the cooperation between the adjusting device 3 and the control rod 6; and then the clamping part 42 is replaced to adapt to heat exchange tubes of different specifications.

Claims

1. A vacuum extraction and detection integrated device, characterized in that: The invention comprises at least one detection cup (1), wherein the detection cup (1) comprises an embedded ring (11) and a vent portion (12) having a circular cross section, wherein the embedded ring (11) and the vent portion (12) are integrally fixedly connected, and the embedded ring (11) is used to seal the outer wall of the heat exchange tube and is fixed by interference fit; a vent hole (121) communicating with the embedded ring (11) is provided in the middle of the vent portion (12), and the vent hole (121) is used to connect to an exhaust pipe; a pressure gauge (2) is fixedly connected to the outer periphery of the vent portion (12), and the pressure gauge (2) passes through the vent portion (12) and communicates with the vent hole (121), and is used to detect the gas pressure inside the heat exchange tube connected to the embedded ring (11) to confirm whether the heat exchange tube is leaking; a groove is provided at the end of the embedded ring (11) away from the vent portion (12), and a pressure ring (111) is embedded in the groove to seal the end of the embedded ring (11); It also includes an auxiliary detection device (9) for clamping more detection cups (1); the auxiliary detection device (9) includes a supporting device (8), at least two clamping devices (4) and at least two adjusting devices (3), the clamping device (4) is slidably connected to the supporting device (8), and the adjusting device (3) is movably mounted on the supporting device (8) and arranged at intervals with the clamping device (4); The supporting device (8) comprises a pair of fixing plates (81), a base plate (82) and a pair of connecting rods (83), wherein the two ends of the pair of connecting rods (83) are respectively vertically fixedly connected to the base plate (82) and the fixing plate (81); the connecting rods (83) are provided with a plurality of adjustment holes (85), and an auxiliary plate (86) is extended from a side away from the fixing plate (81), and the auxiliary plate (86) corresponds to the adjustment holes (85), with one of the fixing plates (81) as the head section and the other fixing plate (81) as the tail end, and the tail end is close to the ground; The clamping device (4) comprises a sliding block (41) and a clamping portion (42); the sliding block (41) is slidably connected to the outer periphery of the base plate (82); a side of the base plate (82) away from the clamping portion (42) is not in contact with the inner wall of the sliding block (41) opposite thereto, so that the base plate (82) has a movable space in the inner wall of the sliding block (41); one end of the sliding block (41) is detachably fixedly connected to the clamping portion (42), and the other end is rotatably connected to a rotating rod (5); the clamping portion (42) is arc-shaped to clamp the detection cup (1); An isolation plate (411) extends from one side of the sliding block (41) toward the rear end. The isolation plate (411) is rotatably connected to a gap plate (43). The gap plate (43) can rotate in a direction away from the sliding block (41), and a roller is fixedly connected to the end close to the base plate (82). The rotating rod (5) is fixedly connected to a limit plate (51) corresponding to the isolation plate (411), and is attached to the end of the isolation plate (411). Both ends extend to a position close to the connecting rod (83). The limit plate (51) is driven to rotate by the rotating rod (5) to limit the rotation of the gap plate (43). The adjusting device (3) comprises an adjusting plate (31), a movable plate (32) and a rotating wheel (33); the movable plate (32) is L-shaped, one end of which is fixedly connected to an end of the adjusting plate (31) away from the clamping portion (42), and the other end of which passes through the auxiliary plate (86) and further extends; the middle portion of the side of the movable plate (32) away from the adjusting plate (31) is meshingly connected to the rotating wheel (33); the rotating wheel (33) drives the movable plate (32) and the adjusting plate (31) to move along the length direction of the movable plate (32) through the rotation of the rotating wheel (33).

2. A vacuum extraction and detection integrated device according to claim 1, characterized in that: The adjustment plate (31) comprises a curved plate (311) and a straight plate (312) that are fixedly connected; the curved plate (311) is disposed between adjacent clamping portions (42) and matches the curvature of the clamping portions (42); the width of the curved plate (311) gradually decreases in a direction away from the base plate (82); and the straight plate (312) drives the curved plate (311) to slide through the adjustment hole (85).

3. The vacuum extraction and detection integrated device according to claim 2, characterized in that: Fixed rods are slidably connected to both sides of the rotating wheel (33), and the fixed rods are fixedly connected to the auxiliary plate (86). A control rod (6) is meshingly connected to the middle of the rotating wheel (33), and the control rod (6) extends toward both ends to a position close to the connecting rod (83), and is respectively located on both sides of the straight plate (312) with the rotating rod (5).

4. The vacuum extraction and detection integrated device according to claim 3, characterized in that: One end of the control rod (6) faces the head end and is fixedly connected to the rotating disk, and the other end is rotatably connected to the supporting plate (84). The supporting plate (84) is fixedly connected to the fixing plate (81). One end of the rotating rod (5) is fixedly connected to the handle, and the other end is rotatably connected to the supporting plate (84).

5. The vacuum extraction and detection integrated device according to claim 4, characterized in that: The support plate (84) is rotatably connected to a fastening device (7), the fastening device (7) comprising an abutting portion (71) and an abutting rod (72), the outer wall of the abutting rod (72) being provided with a thread and being threadably connected to the support plate (84), one end of the abutting rod (72) being fixedly connected to a handle, and the other end of the abutting rod (72) passing through the support plate (84) and being fixedly connected to the abutting portion (71), the abutting portion (71) is driven to approach the abutting sliding block (41) by rotating the abutting rod (72) so as to abut against two sides of the sliding block (41), or to move away from the sliding block (41).

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