Automobile water bottle pressure pulse test plugging structure and tooling

Abstract

The application provides a plugging structure for pressure pulse test of a car water bottle and a tool, and belongs to the technical field of pressure test, wherein the plugging structure comprises a metal inner core, the metal inner core has an external thread, the metal inner core is threadedly connected with a water bottle cover, and the metal inner core is used for replacing a pressure relief valve; when the water bottle cover is connected to a spout of an inflatable water bottle, the metal inner core isolates a pressure relief hole and an internal space of the inflatable water bottle. The plugging structure for pressure pulse test of the car water bottle can replace the pressure relief valve with the metal inner core, so that when the pressure in the inflatable water bottle is greater than 35 KPa during the test, the pressure relief can be avoided, and then the inflatable water bottle can be tested under the pulse pressure of 10 KPa-300 KPa.

Description

Technical Field

[0001] This application belongs to the field of pressure testing technology, specifically relating to a sealing structure and tooling for pressure pulse testing of a car water tank. Background Technology

[0002] An automotive expansion tank is used to ensure that the radiator is full of coolant, so that the coolant in the radiator has room to be released when it expands due to heat. In the existing technology, during the mass production of expansion tanks, it is necessary to conduct random inspections of the expansion tanks and perform pressure pulse tests on the inspected expansion tanks to determine whether the produced expansion tanks meet the requirements.

[0003] Before testing, connect the expansion tank to the pulse testing machine and screw the tank cap onto the expansion tank; then inject coolant into the expansion tank through the pipe. After the coolant is injected, the test can begin. The pulse testing machine can provide pulse pressures of 10Kpa-300Kpa to the expansion tank, with a circulation frequency of 1.0-1.5Hz. The temperature of the coolant can be adjusted inside the pulse testing machine, allowing the coolant to circulate at 65℃ or -35℃.

[0004] The kettle lid has a pressure relief hole, and a pressure relief valve is installed on the inside of the kettle lid. The kettle lid and the pressure relief valve are connected by threads, that is, the kettle lid has internal threads and the pressure relief valve has external threads. The pressure relief valve is fixed to the kettle lid by the threads. The pressure relief hole is located on the vent side of the pressure relief valve. When the pressure inside the expansion kettle is greater than the opening pressure of the pressure relief valve, the pressure relief valve opens, and the gas inside the expansion kettle is discharged from the pressure relief hole after passing through the pressure relief valve.

[0005] During the test, the highest test pressure was 300 kPa, while the pressure relief pressure of the kettle lid was 35 kPa. When the test pressure exceeded 35 kPa, the kettle lid would automatically release pressure, making it impossible to conduct a pressure test on the expansion kettle at 300 kPa. Utility Model Content

[0006] This application provides a sealing structure and tooling for a pressure pulse test of a car water bottle, which aims to solve the problem that the water bottle cap in the prior art cannot be tested under a pressure of 300 kPa.

[0007] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0008] A pressure pulse test sealing structure for a car water tank is provided, comprising:

[0009] A metal inner core having external threads, the metal inner core being threadedly engaged with a kettle lid;

[0010] The metal core is used to replace the pressure relief valve; when the kettle lid is connected to the spout of the expansion kettle, the metal core isolates the pressure relief hole from the internal space of the expansion kettle.

[0011] This application provides a pressure pulse test sealing structure for a car water tank. Compared with the prior art, the outer dimensions of the metal inner core are the same as those of the pressure relief valve. By replacing the pressure relief valve with the metal inner core, pressure relief can be avoided when the pressure inside the expansion tank is greater than 35 kPa during the test, thus facilitating the expansion tank to complete the test under pulse pressure of 10 kPa-300 kPa.

[0012] Based on the same inventive concept, another technical solution adopted in this application is:

[0013] A pressure pulse testing fixture for automotive water tanks is provided, which is set on the worktable of a pulse testing machine. The testing fixture includes:

[0014] The aforementioned sealing structure is used to connect to the inside of the kettle lid;

[0015] The baffle is attached to the workbench;

[0016] The frame has an opening at the bottom and on one side; the bottom of the frame contacts the workbench, and the open side of the frame can contact a baffle to form a receiving space for accommodating an expansion kettle; the workbench has a through hole for a pipe to pass through at the location of the receiving space.

[0017] Both the inner side of the baffle and the inner side of the frame have a heat insulation layer; when the opening side of the frame contacts the baffle, the frame and the baffle are fixed by a connecting structure.

[0018] In one possible implementation, the connection structure includes:

[0019] Several first connecting parts are respectively connected to the outer peripheral wall on the opening side of the frame;

[0020] A plurality of second connecting parts are respectively connected to the outer peripheral wall of the baffle, and the second connecting parts correspond one-to-one with the first connecting parts;

[0021] Several sleeves correspond one-to-one with the first connecting part; when the opening side of the frame contacts the baffle, the first connecting part contacts the second connecting part, and the sleeves are fitted with the first connecting part and the second connecting part to limit the position between the frame and the baffle.

[0022] In one possible implementation, the baffle has a connecting post on its outer side, and the sleeve has a lifting ring on its outer side wall;

[0023] The connecting column is equipped with a connecting rope, one end of which is fixed to the connecting column and the other end of which is tied to the lifting ring.

[0024] In one possible implementation, the first connecting part and the second connecting part are in the shape of a plate structure or a column structure.

[0025] In one possible implementation, the frame has a U-shaped groove on the open side, and the baffle has a U-shaped frame that engages with the U-shaped groove.

[0026] In one possible implementation, the bottom of the baffle has an outwardly bent portion with a connecting hole, and the worktable has a threaded hole aligned with the connecting hole. The bent portion is fixed to the worktable by bolts.

[0027] In one possible implementation, the side wall of the frame has an observation port, and a transparent plate is connected inside the observation port, the thickness of the transparent plate being less than the thickness of the observation port.

[0028] In one possible implementation, the worktable has a groove at the location of the accommodating space, and a through hole for the pipe to pass through is located on the bottom wall of the groove;

[0029] The groove has a drain outlet on its bottom wall, and a drain pipe is connected to the bottom of the workbench at the drain outlet. When the expansion tank leaks, the groove can catch the coolant, which can then flow into the drain outlet.

[0030] In one possible implementation, the bottom wall of the groove has an inclined surface that slopes toward the drain outlet.

[0031] This application provides a pressure pulse testing fixture for an automotive coolant reservoir. Compared with existing technologies, the effect of the sealing structure is not detailed here. After connecting the interface on the expansion reservoir through a pipe, the frame is connected to the baffle. At this time, a accommodating space for accommodating the expansion reservoir is formed between the baffle, the frame, and the worktable. By setting an insulation layer on the inner side of the baffle and the inner side of the frame, the accommodating space can be insulated. When the coolant temperature is 65°C, the ambient temperature inside the accommodating space can be kept close to 65°C during coolant circulation. When the coolant temperature is -35°C, the ambient temperature inside the accommodating space can be kept close to -35°C during coolant circulation. Through the above settings, the temperature difference between the inside and outside of the expansion reservoir can be reduced. Attached Figure Description

[0032] Figure 1 A schematic diagram of a pressure pulse testing fixture for a car water tank provided in an embodiment of this application;

[0033] Figure 2 for Figure 1Enlarged diagram of section A in the middle;

[0034] Figure 3 A schematic diagram of the frame portion of a car water tank pressure pulse testing fixture provided in an embodiment of this application;

[0035] Figure 4 for Figure 3 Enlarged diagram of section B in the middle;

[0036] Figure 5 A schematic diagram of the metal inner core and the water bottle cap of a car water bottle pressure pulse testing fixture provided in an embodiment of this application;

[0037] Figure 6 A schematic diagram of the metal inner core of a car water bottle pressure pulse testing fixture provided in an embodiment of this application;

[0038] Figure 7 A schematic diagram of the baffle portion of a pressure pulse testing fixture for a car water tank provided in an embodiment of this application;

[0039] Figure 8 This is a front view of a car water tank pressure pulse testing fixture provided in an embodiment of this application.

[0040] Explanation of reference numerals in the attached drawings: 1. Metal inner core; 2. Kettle lid; 3. Expansion kettle; 4. Baffle; 41. Connecting post; 42. Bending part; 421. Connecting hole; 5. Frame; 51. U-shaped groove; 52. U-shaped frame; 53. Observation port; 54. Transparent plate; 6. Workbench; 61. Groove; 62. Drain outlet; 63. Drain pipe; 7. Connecting structure; 71. First connecting part; 72. Second connecting part; 73. Sleeve; 731. Lifting ring. Detailed Implementation

[0041] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0042] Please refer to the following: Figures 1 to 8This application describes a pressure pulse testing fixture for a car water tank. The fixture includes a metal inner core 1 with external threads, which is threaded into the water tank cap 2. The metal inner core 1 replaces the pressure relief valve. When the water tank cap 2 is connected to the opening of the expansion tank 3, the metal inner core 1 isolates the pressure relief hole from the internal space of the expansion tank 3. The metal inner core 1 is a solid structure. When the metal inner core contacts the inner circumferential wall of the expansion tank opening, a sealing ring is formed between the metal inner core 1 and the inner circumferential wall of the opening, providing a sealing effect. The sealing ring is fitted onto the metal inner core 1.

[0043] This application provides a pressure pulse test sealing structure for a car water tank. Compared with the prior art, the outer dimensions of the metal inner core 1 are the same as those of the pressure relief valve. By replacing the pressure relief valve with the metal inner core 1, pressure relief can be avoided when the pressure inside the expansion tank 3 is greater than 35 kPa during the test, thus facilitating the expansion tank 3 to complete the test under pulse pressure of 10 kPa-300 kPa.

[0044] When testing the expansion tank 3, the pulse pressure was 10 kPa-300 kPa and the cycle frequency was 1.0-1.5 Hz.

[0045] Test conditions 1: Coolant temperature: 65℃ +0 / -5℃; Number of cycles: 130,000.

[0046] Test Condition 2: Coolant temperature: -35℃ +0 / -5℃; Number of cycles: 120,000.

[0047] Test condition one and test condition two are tested sequentially, for a total of 250,000 cycles.

[0048] Test pass criteria: No leakage during the test, no quality defects (bubbles, looseness, cracks, tears), and no internal overflow at the weld joint.

[0049] Based on the same inventive concept, this application also provides a pressure pulse testing fixture for a car water bottle, which is set on the worktable 6 of a pulse testing machine. The testing fixture includes a sealing structure, a baffle 4, and a frame 5. The baffle 4 is connected to the worktable 6. The bottom and one side of the frame 5 are open. The bottom of the frame 5 contacts the worktable 6, and the open side of the frame 5 can contact the baffle 4 to form a accommodating space for accommodating an expansion water bottle 3. The worktable 6 has a through hole for a pipe to pass through at the location of the accommodating space. The inner side of the baffle 4 and the inner side of the frame 5 both have a heat insulation layer. When the open side of the frame 5 contacts the baffle 4, the frame 5 and the baffle 4 are fixed by a connecting structure 7.

[0050] The automotive coolant reservoir pressure pulse testing fixture provided in this application, compared with the prior art, has a sealing structure whose effect will not be elaborated here. After connecting the interface on the expansion reservoir 3 through the pipe, the frame 5 is connected to the baffle 4. At this time, a accommodating space for accommodating the expansion reservoir 3 is formed between the baffle 4, the frame 5 and the worktable 6. By setting the heat insulation layer on the inner side of the baffle 4 and the inner side of the frame 5, the accommodating space can be insulated. When the coolant temperature is 65°C, the ambient temperature in the accommodating space can be kept close to 65°C during the coolant circulation process. When the coolant temperature is -35°C, the ambient temperature in the accommodating space can be kept close to -35°C during the coolant circulation process. Through the above settings, the temperature difference between the inside and outside of the expansion reservoir 3 can be reduced.

[0051] The baffle 4 and the frame 5 are fixed by the connecting structure 7, which can ensure that the baffle 4 and the frame 5 will not detach during the test of the expansion tank 3; the heat insulation layer on the baffle 4 and the frame 5 can play a heat preservation role, so that the ambient temperature in the containment space is close to the temperature of the coolant, reducing the temperature difference.

[0052] In some embodiments, such as Figures 1 to 8 As shown, the connecting structure 7 includes a plurality of first connecting parts 71, a plurality of second connecting parts 72, and a plurality of sleeves 73; the plurality of first connecting parts 71 are respectively connected to the outer peripheral wall of the opening side of the frame 5; the plurality of second connecting parts 72 are respectively connected to the outer peripheral wall of the baffle 4, and the second connecting parts 72 correspond one-to-one with the first connecting parts 71; the plurality of sleeves 73 correspond one-to-one with the first connecting parts 71; when the opening side of the frame 5 contacts the baffle 4, the first connecting parts 71 and the second connecting parts 72 contact each other, and the sleeves 73 are sleeved with the first connecting parts 71 and the second connecting parts 72 to limit the position between the frame 5 and the baffle 4; the first connecting parts 71 and the second connecting parts 72 are plate-shaped structures or column-shaped structures; in this embodiment, the first connecting parts 71 and the second connecting parts 72 are described using a plate-shaped structure as an example.

[0053] A first connecting part 71, a second connecting part 72 and a sleeve 73 constitute a set of fasteners. Two sets of fasteners are provided on both sides and the top of the frame 5. That is, a total of six sets of fasteners are provided on both sides and the top of the frame 5.

[0054] After connecting the expansion tank 3 to the pipeline of the pulse testing machine, place the frame 5 on the workbench 6 and make the open side of the frame 5 contact the baffle 4. At this time, the first connecting part 71 contacts the corresponding second connecting part 72. The sleeve 73 is sleeved with the first connecting part 71 and the second connecting part 72, which can play a limiting role.

[0055] It should be noted that the sleeves 73 on both sides of the frame 5 can restrict the frame 5 from sliding along the height direction, and the sleeve 73 on the top of the frame 5 can restrict the frame 5 from sliding along both sides; the sleeves 73 on both sides and the top of the frame 5 can restrict the frame 5 from sliding backward; through the above settings, the forward, backward, left, right, up, and down sliding of the frame can be restricted, and the frame 5 can be fixed on the baffle 4, reducing the occurrence of the frame 5 separating from the baffle 4 during the test of the expansion tank 3.

[0056] In some embodiments, such as Figures 1 to 8 As shown, the outer side of the baffle 4 has a connecting post 41, and the outer side wall of the sleeve 73 has a lifting ring 731; wherein, a connecting rope is provided on the connecting post 41, one end of the connecting rope is fixed to the connecting post 41, and the other end of the connecting rope is tied to the lifting ring 731. The length of the connecting rope is sufficient to allow the sleeve 73 to be inserted into the first connecting part 71 and the second connecting part 72, and also to allow the sleeve 73 to slide out from the first connecting part 71 and the second connecting part 72.

[0057] The connecting post 41 can be a bolt. The outer side of the baffle 4 has a threaded hole corresponding to the second connecting part 72. The bolt is threadedly engaged with the threaded hole on the baffle 4. One end of the connecting rope is tied to the bolt, and the other end of the connecting rope is tied to the lifting ring 731 of the sleeve 73. Through the above arrangement, the connection between the sleeve 73 and the baffle 4 can be strengthened, and the possibility of the sleeve 73 being lost can be reduced.

[0058] In some embodiments, such as Figures 1 to 8 As shown, the frame 5 has a U-shaped groove 51 on the open side, and the baffle 4 has a U-shaped frame 52 that is inserted into the U-shaped groove 51.

[0059] With the above settings, the connection position between the frame 5 and the baffle 4 can be initially located, so that the first connecting part 71 can be aligned with the corresponding second connecting part 72. Then, the sleeve 73 is sleeved with the first connecting part 71 and the second connecting part 72 to complete the limiting between the baffle 4 and the frame 5.

[0060] In some embodiments, such as Figures 1 to 8 As shown, the bottom of the baffle 4 has a bent portion 42 that bends outward, and the bent portion 42 has a connecting hole 421. The worktable 6 has a threaded hole aligned with the connecting hole 421. The bent portion 42 is fixed to the worktable 6 by bolts.

[0061] After the baffle 4 is placed in the installation position on the workbench 6, the connecting hole 421 on the bent part 42 is aligned with the threaded hole on the workbench 6. At this time, the bent part 42 can be fixed on the workbench 6 by bolts, thereby fixing the baffle 4 on the workbench 6.

[0062] It should be noted that after the frame 5 is fixed to the baffle 4, although there is a gap between the inner side of the baffle 4 at the bend and the frame 5, this gap does not affect the test of the expansion tank 3.

[0063] In some embodiments, such as Figures 1 to 8 As shown, the side wall of the frame 5 has an observation port 53, and a transparent plate 54 is connected inside the observation port 53. The thickness of the transparent plate 54 is less than the thickness of the observation port 53.

[0064] The transparent plate 54 inside the observation port 53 can be multi-layered. By setting the observation port 53 and the transparent plate 54 on the observation port 53, it is convenient for the operator to observe the expansion tank 3 through the transparent plate 54. Therefore, it is convenient for the operator to see whether the expansion tank 3 has obvious deformation.

[0065] In some embodiments, such as Figures 1 to 8 As shown, the workbench 6 has a groove 61 at the location of the accommodating space, and a through hole for the pipe to pass through is located on the bottom wall of the groove 61; wherein, the bottom wall of the groove 61 also has a drain port 62, and the bottom of the workbench 6 is connected to the drain port 62 at the location of the drain pipe 63, and the other end of the drain pipe 63 is connected to a designated container; when the expansion tank 3 leaks, the groove 61 can catch the coolant, and the coolant can flow into the drain port 62; the bottom wall of the groove 61 has an inclined surface that slopes toward the drain port 62.

[0066] By providing a groove 61 within the accommodating space, the groove 61 can catch any leakage that occurs in the expansion tank 3 during testing, and the leaked coolant can be directed to a designated container through the drain port 62 and the drain pipe 63. By providing a sloped surface on the bottom wall of the groove 61 towards the drain port 62, coolant can easily flow into the drain port 62 and then be discharged through the drain pipe 63.

[0067] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pressure pulse test sealing structure for a car water tank, characterized in that, include: A metal inner core having external threads, the metal inner core being threadedly engaged with a kettle lid; The metal core is used to replace the pressure relief valve; when the kettle lid is connected to the spout of the expansion kettle, the metal core isolates the pressure relief hole from the internal space of the expansion kettle.

2. A pressure pulse testing fixture for a car water tank, characterized in that, The testing fixtures, set on the worktable of the pulse testing machine, include: The sealing structure as described in claim 1 is used to connect to the inside of the kettle lid; The baffle is attached to the workbench; The frame has an opening at the bottom and on one side; the bottom of the frame contacts the workbench, and the open side of the frame can contact a baffle to form a receiving space for accommodating an expansion kettle; the workbench has a through hole for a pipe to pass through at the location of the receiving space. Both the inner side of the baffle and the inner side of the frame have a heat insulation layer; when the opening side of the frame contacts the baffle, the frame and the baffle are fixed by a connecting structure.

3. The automotive water tank pressure pulse testing fixture as described in claim 2, characterized in that, The connection structure includes: Several first connecting parts are respectively connected to the outer peripheral wall on the opening side of the frame; A plurality of second connecting parts are respectively connected to the outer peripheral wall of the baffle, and the second connecting parts correspond one-to-one with the first connecting parts; Several sleeves correspond one-to-one with the first connecting part; when the opening side of the frame contacts the baffle, the first connecting part contacts the second connecting part, and the sleeves are fitted with the first connecting part and the second connecting part to limit the position between the frame and the baffle.

4. The automotive water tank pressure pulse testing fixture as described in claim 3, characterized in that, The outer side of the baffle has a connecting post, and the outer side wall of the sleeve has a lifting ring; The connecting column is equipped with a connecting rope, one end of which is fixed to the connecting column and the other end of which is tied to the lifting ring.

5. The automotive water tank pressure pulse testing fixture as described in claim 3, characterized in that, The first connecting part and the second connecting part are plate-shaped or column-shaped.

6. The automotive water tank pressure pulse testing fixture as described in claim 2, characterized in that, The frame has a U-shaped groove on the open side, and the baffle has a U-shaped frame that is inserted into the U-shaped groove.

7. The pressure pulse testing fixture for a car water tank as described in claim 2, characterized in that, The bottom of the baffle has an outwardly bent portion with a connecting hole, and the worktable has a threaded hole aligned with the connecting hole. The bent portion is fixed to the worktable by bolts.

8. The pressure pulse testing fixture for a car water tank as described in claim 2, characterized in that, The frame has an observation port on its side wall, and a transparent plate is connected inside the observation port. The thickness of the transparent plate is less than the thickness of the observation port.

9. The pressure pulse testing fixture for a car water tank as described in claim 2, characterized in that, The workbench has a groove at the location of the accommodating space, and the through hole for the pipe to pass through is located on the bottom wall of the groove; The groove has a drain outlet on its bottom wall, and a drain pipe is connected to the bottom of the workbench at the drain outlet. When the expansion tank leaks, the groove can catch the coolant, which can then flow into the drain outlet.

10. The automotive water tank pressure pulse testing fixture as described in claim 9, characterized in that, The bottom wall of the groove has an inclined surface that slopes toward the drain outlet.

Images