Floating sealing test assembly and intake pipe assembly sealing test equipment

Abstract

The present invention relates to a floating sealing test assembly, comprising an air-tight test head, a load-bearing member, a locking screw and a floating adjustment function unit. The floating adjustment function unit comprises a base plate, a height-conforming screw and a columnar spring. The base plate is fixedly connected to the load-bearing member by means of the locking screw. A first through hole for the height-conforming screw to freely pass through is provided on the base plate, and a threaded hole for the height-conforming screw to be screwed in is provided on the side wall of the air-tight test head. The number of the height-conforming screws is at least 3 and is evenly distributed circumferentially. The number of the columnar springs is consistent with the number of the height-conforming screws. The columnar springs are correspondingly sleeved on the height-conforming screws one by one and are always elastically pressed between the base plate and the side wall of the air-tight test head. Before the sealing test is formally performed, the floating adjustment function unit can adaptively float according to the specific orientation of the pipeline to be tested. In addition, the present invention also relates to an intake pipe assembly sealing test device.

Description

Technical Field

[0001] The invention relates to the technical field of air tightness testing, in particular to a floating air tightness testing component and an air intake pipe component air tightness testing device. Background Art

[0002] The automobile engine uses the intake pipe assembly to supply oxygen to its combustion chamber. Figure 1 As shown in the figure, the air inlet pipe assembly includes a gas processing main cavity, an air inlet assembly, a first main air outlet pipe, a second main air outlet pipe and a branch air outlet pipe assembly. The air inlet assembly is connected to the gas processing main cavity, and includes an air inlet pipe and a connecting flange plate fixed to the free end of the air inlet pipe; the first main air outlet pipe and the second main air outlet pipe are directly connected to the gas processing main cavity to provide oxygen supply to the engine combustion chamber at the same time.

[0003] The sealing of the intake pipe assembly itself has a vital impact on the normal operation and power of the engine. In order to ensure the actual application performance of the intake pipe assembly, it must be tested for air tightness after assembly. The more commonly used test steps are: 1) Fill the inner cavity of the intake pipe assembly with pressurized gas, assuming the pressure value is a; 2) Maintain the pressure for at least 5 minutes; 3) Measure the air pressure in the inner cavity of the intake pipe assembly, assuming the pressure value is b; 4) Compare a and b, and obtain the difference c; 5) Determine whether c is within the detection standard range. If c is within the detection standard range, and indirectly reflects that the sealing of the intake pipe assembly meets the use requirements, it can be transferred to the next process; if c exceeds the detection standard range, it indirectly reflects that the sealing of the intake pipe assembly does not meet the quality standards, there are areas with air leakage, and it needs to be repaired.

[0004] In the prior art, the air inlet pipe is usually blocked by means of a flange plate blocking unit, while the first main air outlet pipe and the second main air outlet pipe are blocked by a test assembly. For the air inlet pipe, since there is a connecting flange plate at its free end, it is convenient for the flange plate blocking unit to seal and block it, and the implementation is not difficult; for the first main air outlet pipe and the second main air outlet pipe, before the actual air tightness test is carried out, the test assembly needs to be directly inserted into its inner cavity, which requires the test assembly to have extremely high alignment accuracy relative to the first main air outlet pipe and the second main air outlet pipe. Otherwise, it is very easy to have a poor seal, which will lead to inaccurate air tightness test results. In addition, the test assembly is driven by a cylinder for displacement and is rigidly connected. When the alignment error deviation is large, the test assembly is very likely to damage the pipe wall or expand the pipe wall during the process of inserting it into the first main air outlet pipe and the second main air outlet pipe, and a large amount of manpower and material resources need to be invested for repair. Therefore, it is urgent for technical personnel to solve the above problems. Summary of the invention

[0005] Therefore, in view of the above-mentioned existing problems and defects, the designers of the present invention collected relevant information, conducted multiple evaluations and considerations, and continued to experiment and modify after many years of R&D experience in this industry, which ultimately led to the emergence of the floating sealing test assembly.

[0006] In order to solve the above technical problems, the present invention relates to a floating sealing test assembly, which includes an airtight test head, a load-bearing member, a locking screw and a floating adjustment function part. The floating adjustment function part includes a base plate, an equal height screw and a columnar spring. The base plate is fixedly connected to the load-bearing member by means of a locking screw. A first through hole for the equal height screw to pass freely is provided on the base plate, and a threaded hole for the equal height screw to be screwed is provided on the side wall of the airtight test head. The number of equal height screws is set to at least 3 and is evenly distributed circumferentially. The number of columnar springs is consistent with the number of equal height screws. The columnar springs are correspondingly mounted on the equal height screws one by one, and are always elastically pressed between the side wall of the base plate and the airtight test head.

[0007] As a further improvement of the technical solution of the present invention, the floating adjustment function part also includes an adjustment plate. The adjustment plate is flat on the base plate and directly supports the columnar spring. A second through hole is opened in the adjustment plate for the equal height screw to freely pass through.

[0008] As a further improvement of the technical solution of the present invention, the floating adjustment function part also includes a spring plunger. The spring plunger is inserted into the load-bearing member. An adapting groove is provided on the base plate. The free end of the spring plunger always elastically presses against the adapting groove.

[0009] As a further improvement of the technical solution of the present invention, the floating adjustment function part also includes a transition force transmission member. The transition force transmission member is arranged between the load-bearing member and the base plate. Corresponding to the free end of the spring plunger, a slot for inserting the free end of the elastic plunger is formed by the side wall of the transition force transmission member. Corresponding to the matching groove, the transition force transmission member extends outward to form a supporting arc surface.

[0010] Compared with the sealing test assembly of the traditional design structure, the technical solution disclosed in the present invention is additionally provided with a floating adjustment function part. Before the sealing test is formally performed, the floating adjustment function part can be adaptively floated according to the specific orientation of the pipeline to be tested, so as to ensure that the airtight test head reliably blocks the pipeline to be tested, thereby ensuring the accuracy of the airtight test result. In addition, due to the self-floating characteristics of the floating adjustment function part, the occurrence of pressure loss or expansion of the pipeline to be tested is prevented to a certain extent.

[0011] In addition, the present invention also discloses an air intake pipe assembly sealing test device, which includes a base plate, a clamping tool, a clamping unit, a first air tightness test unit, a second air tightness test unit and a flange plate sealing unit. The clamping tool is fixed on the base plate. The clamping unit is also fixed on the base plate and arranged behind the clamping tool. After the air intake pipe assembly is positioned on the clamping tool, it is clamped and limited by the clamping unit. The first air tightness test unit and the second air tightness test unit are both fixed on the base plate and arranged side by side on the left side of the clamping tool to respectively achieve the sealing of the two air outlet pipes of the air intake pipe assembly. The flange plate sealing unit is also fixed on the base plate and arranged on the right side of the clamping tool to achieve the sealing of the flange plate on the air intake pipe of the air intake pipe assembly. The first air tightness test unit includes a first linear drive unit and a first floating air tightness test assembly. The second air tightness test unit includes a second linear drive unit and a second floating air tightness test assembly. The first floating sealing test assembly and the second floating sealing test assembly are both the floating sealing test assemblies mentioned above.

[0012] As a further improvement of the technical solution of the present invention, the pressing unit includes a linear swing clamping cylinder, a pressing arm and a pressing head assembly. The pressing arm is arranged directly above the clamping fixture and swings under the driving force of the linear swing clamping cylinder to achieve the pressing / relaxing of the intake pipe assembly. The pressing head assembly is fixed on the pressing arm and is directly aligned with the intake pipe assembly.

[0013] As a further improvement of the technical solution of the present invention, the pressure head assembly includes a pressure bolt and a locking nut. The pressure bolt is screwed and fixed on the pressure arm, and the locking nut is screwed on the pressure bolt. When the locking nut is pressed against the pressure arm, the axial displacement of the pressure bolt is locked.

[0014] As a further improvement of the technical solution of the present invention, the flange plate blocking unit includes a third linear drive unit, a fourth linear drive unit and a blocking pressure head. Under the driving force of the third linear drive unit and the fourth linear drive unit, the blocking pressure head moves in the left-right direction and the up-down direction respectively until the flange plate on the intake pipe of the intake pipe assembly is blocked.

[0015] As a further improvement of the technical solution of the present invention, the flange plate blocking unit further includes an elastic rubber pad which is attached to the lower plane of the blocking pressure head.

[0016] By adopting the above-mentioned technical solution, when the air intake pipe assembly to be tested is clamped in place, the flange plate sealing unit and the first air tightness test unit and the second air tightness test unit with floating adjustment function cooperate with each other to achieve the sealing of one air intake pipe and two air outlet pipes on the air intake pipe assembly to be tested. The operation is convenient and quick, and the total auxiliary time required for the air tightness test is greatly reduced. It not only effectively improves the air tightness test efficiency of the air intake pipe assembly, but also ensures the accuracy of the final result of the air tightness test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a three-dimensional schematic diagram of the air intake pipe assembly in the present invention.

[0019] Figure 2 It is a three-dimensional schematic diagram of the floating sealing test assembly in the present invention.

[0020] Figure 3 It is an exploded schematic diagram of the floating sealing test assembly in the present invention.

[0021] Figure 4 yes Figure 2 Front view of .

[0022] Figure 5 yes Figure 2 Side view of.

[0023] Figure 6 yes Figure 5 AA section view.

[0024] Figure 7 It is a three-dimensional schematic diagram of a transition force transmission member in a floating sealing test assembly of the present invention.

[0025] Figure 8 It is a three-dimensional schematic diagram of the air intake pipe assembly sealing test equipment in the present invention.

[0026] Fig. 9 It is a three-dimensional schematic diagram of a clamping tool in the air intake pipe assembly sealing test equipment of the present invention.

[0027] Fig.10 It is a three-dimensional schematic diagram of a pressing unit in the air intake pipe assembly sealing test device of the present invention.

[0028] Fig.11It is a three-dimensional schematic diagram of the first airtightness testing unit in the air intake pipe assembly airtightness testing device of the present invention.

[0029] Fig.12 It is a three-dimensional schematic diagram of the second airtightness test unit in the air intake pipe assembly airtightness test device of the present invention.

[0030] Fig.13 It is a three-dimensional schematic diagram of a flange plate blocking unit in the air intake pipe assembly sealing test equipment of the present invention.

[0031] 1-base plate; 2-clamping fixture; 3-clamping unit; 31-linear swing clamping cylinder; 32-pressing arm; 33-pressing head assembly; 331-pressing bolt; 332-locking nut; 4-first air tightness test unit; 41-first linear drive unit; 42-first floating air tightness test assembly; 421-air tightness test head; 422-load bearing member; 423-locking screw; 424-floating adjustment function unit; 4241-base plate; 42411-adapting groove ; 4242-equal height screws; 4243-columnar springs; 4244-adjusting plates; 4245-spring plungers; 4246-transition force transmission members; 42461-slots; 42462-arc-shaped surfaces against which to lean; 5-second air tightness test unit; 51-second linear drive unit; 52-second floating air tightness test assembly; 6-flange plate plugging unit; 61-third linear drive unit; 62-fourth linear drive unit; 63-plugging pressure head; 64-elastic rubber pad. DETAILED DESCRIPTION

[0032] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "left", "right", "up", "down", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0033] In the process of testing the air intake pipe assembly for sealing performance, in order to ensure the reliability of sealing of the main air outlet pipe and finally obtain a relatively accurate test result, a floating sealing test assembly is disclosed herein. Taking the first floating sealing test assembly 42 disclosed in the present invention as an example, Figure 2-6As shown in , it is mainly composed of several parts such as an airtight test head 421, a load-bearing member 422, a locking screw 423 and a floating adjustment function part 424. Among them, the floating adjustment function part 424 includes a base plate 4241, a height screw 4242 and a columnar spring 4243. The base plate 4241 is fixedly connected to the load-bearing member 422 by means of the locking screw 4242, and the locking screw 423 has a certain displacement and movement amount along its axial direction, which is generally controlled to be 3 to 5 mm. A first through hole is provided on the base plate 4241 for the height screw 4242 to freely pass through, and a threaded hole is provided on the side wall of the airtight test head 421 for the height screw 4242 to be screwed in. The number of height screws 4242 is set to at least 3, and is evenly distributed circumferentially. The number of columnar springs 4243 is consistent with the number of height screws 4242. The columnar springs 4243 are sleeved on the equal height screws 4242 in a one-to-one correspondence, and are always elastically pressed between the base plate 4241 and the side wall of the airtight test head 421 .

[0034] Before the sealing test is formally performed, the floating adjustment function part 424 can adaptively float according to the specific orientation of the pipeline to be tested. Specifically, when the airtight test head 421 is subjected to external force, the compression amount of each columnar spring 4243 can be adaptively adjusted according to the actual situation, and the equal height screw 4242 can move freely along its axial direction. The equal height screw 4242 and the columnar spring 4243 cooperate and coordinate with each other to maintain the airtight test head 421 in the correct swing posture at all times. In this way, the reliable blocking of the airtight test head 421 to the pipeline to be tested is ensured, thereby ensuring the accuracy of the airtightness test results. In addition, due to the self-floating characteristics of the floating adjustment function part 424, the occurrence of pressure loss or expansion of the pipeline to be tested is prevented to a certain extent.

[0035] In order to adjust the compressible amount of each columnar spring 4243 more quickly as a whole, the floating adjustment function part 424 can also be additionally provided with an adjustment plate 4244 according to actual conditions. The adjustment plate 4244 is flatly attached to the base plate 4241 and directly supports the columnar spring 4243. A second through hole (such as a second through hole) is provided in the adjustment plate 4244 for the equal height screw 4242 to freely pass through. Figure 5 , 6 When the compressible amount of each columnar spring 4243 needs to be fine-tuned, the adjustment plate 4244 is removed, and then the thickened or thinned adjustment plate 4244 is reinstalled. The entire adjustment process is convenient, fast, and easy to implement.

[0036] Furthermore, as a further optimization of the structure of the first floating sealing test assembly 42, the floating adjustment function part 424 can be further provided with a spring plunger 4245 according to actual conditions. The spring plunger 4245 is inserted into the load-bearing member 422. An adapting groove 42411 is provided on the base plate 4241. The free end of the spring plunger 4245 always elastically presses against the adapting groove 42411 (such as Figure 5 , 6 When the air-tight test head 421 needs to be adjusted in the axial direction over a large distance, the spring plunger 4245 can be extended or shortened accordingly.

[0037] Furthermore, the floating adjustment function part 424 can also be provided with a transition force transmission member 4246 according to actual conditions. The transition force transmission member 4246 is arranged between the load bearing member 422 and the base plate 4241 (such as Figure 5 , 6 As shown in FIG. 4 ). Corresponding to the free end of the spring plunger 4245, the side wall of the transition force transmission member 4246 is recessed inward to form a slot 42461 for the free end of the elastic plunger 4245 to be inserted. Corresponding to the matching groove 42411, the transition force transmission member 4246 extends outward to form a supporting arc surface 42462 (as shown in FIG. Figure 7 ). The presence of the transition force transmission member 4246 produces at least the following beneficial effects: 1) effectively preventing the transition force transmission member 4246 from being subjected to lateral force in the process of pushing up the base plate 4241, thereby avoiding the "biased top" phenomenon, thereby ensuring that the spring plunger 4245 has a long service life; 2) reducing the requirements for the installation accuracy of the spring plunger 4245, thereby relaxing the requirements for the processing accuracy of each component of the floating adjustment function part 424 to a certain extent.

[0038] In addition, if Figure 8 As shown in the figure, the present invention also discloses an air intake pipe assembly sealing test device, which mainly comprises a base plate 1, a clamping tool 2 (such as Fig. 9 As shown in ), a clamping unit 3, a first airtightness test unit 4, a second airtightness test unit 5 and a flange plate sealing unit 6. Among them, the clamping fixture 2 is fixed on the base plate 1. The clamping unit 3 is also fixed on the base plate 1 and is arranged behind the clamping fixture 2. After the air intake pipe assembly is positioned on the clamping fixture 2, it is clamped and limited by the clamping unit 3. The first airtightness test unit 4 and the second airtightness test unit 5 are both fixed on the base plate 1 and are arranged side by side on the left side of the clamping fixture 2 to respectively achieve the sealing of the two air outlet pipes of the air intake pipe assembly. The flange plate sealing unit 6 is also fixed on the base plate 1 and is arranged on the right side of the clamping fixture 2 to achieve the sealing of the flange plate on the air intake pipe of the air intake pipe assembly. The first airtightness test unit 4 includes a first linear drive unit 41 and a first floating airtightness test assembly 42 (as shown in Fig.11The second airtightness test unit 5 includes a second linear drive unit 51 and a second floating airtightness test assembly 52 (as shown in Fig.12 The second floating sealing test assembly 52 is specifically designed with reference to the structure of the first floating sealing test assembly 42 described above.

[0039] When the air intake pipe assembly to be tested is clamped in place, the flange plate sealing unit 6 and the first air tightness testing unit 4 and the second air tightness testing unit 5 with floating adjustment function cooperate with each other to achieve the sealing of one air intake pipe and two air outlet pipes on the air intake pipe assembly to be tested. The operation is convenient and quick, which greatly reduces the total auxiliary time required for the air tightness test, which not only effectively improves the air tightness test efficiency of the air intake pipe assembly, but also ensures the accuracy of the final result of the air tightness test.

[0040] like Fig.10 As shown in , the clamping unit 3 preferably includes a linear swing clamping cylinder 31, a pressing arm 32 and a pressure head assembly 33. The pressing arm 32 is arranged directly above the clamping fixture 2, and swings under the action of the driving force of the linear swing clamping cylinder 31 to achieve the clamping / relaxation of the intake pipe assembly. The pressure head assembly 33 is fixed on the pressing arm 32 and is directly aligned with the intake pipe assembly. After the intake pipe assembly is positioned relative to the clamping fixture 2, the linear swing clamping cylinder 31 is started to drive the pressing arm 32 to swing downward until a stable pressing of the intake pipe assembly is achieved. The clamping unit 3 has a very simple design structure, is easy to manufacture and implement, and has a fast action response speed.

[0041] As a further optimization of the structure of the above-mentioned pressure head assembly 33, it preferably includes a pressing bolt 331 and a locking nut 332. The pressing bolt 331 is screwed and fixed on the pressing arm 32, and the locking nut 332 is screwed on the pressing bolt 331. When the locking nut 332 presses the pressing arm 32, the axial displacement of the pressing bolt 331 is locked. In this way, when the model or size of the pre-tested intake pipe assembly changes, the pressing bolt 331 can be easily and quickly pushed up or dragged down to change its relative height position, thereby achieving effective pressing of the intake pipe assembly without adjusting the stroke of the linear swing clamping cylinder 31.

[0042] like Fig.13As shown in , the flange plate plugging unit 6 preferably includes a third linear drive unit 61, a fourth linear drive unit 62 and a plugging pressure head 63. The plugging pressure head 63 moves in the left and right directions and the up and down directions respectively under the driving force of the third linear drive unit 61 and the fourth linear drive unit 62 until the flange plate on the intake pipe of the intake pipe assembly is plugged. Before the airtight test is formally carried out, the intake pipe assembly is fastened to the clamping fixture 2 to always keep its relative position fixed, and the plugging pressure head 63 moves toward the intake pipe under the joint action of the third linear drive unit 61 and the fourth linear drive unit 62 until the connection flange plate is tightly pressed.

[0043] In addition, by Fig.13 It can also be seen that an elastic rubber pad 64 is attached to the lower plane of the sealing pressure head 63 to prevent the outer wall of the intake pipe assembly from being damaged by pressure during the air tightness test.

[0044] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A floating sealing test assembly, characterized in that: It comprises an airtight test head, a load-bearing member, a locking screw and a floating adjustment function part; the floating adjustment function part comprises a base plate, an equal height screw and a columnar spring; the base plate is fixedly connected to the load-bearing member by means of the locking screw, and the locking screw has an axial movable amount of 3 to 5 mm; a first through hole for the equal height screw to freely pass through is provided on the base plate, and a threaded hole for the equal height screw to be screwed in is provided on the side wall of the airtight test head; the number of the equal height screws is set to at least 3 and is evenly distributed circumferentially; the number of the columnar springs is consistent with the number of the equal height screws; The columnar springs are sleeved on the equal height screws one by one and are always elastically pressed between the substrate and the side wall of the airtight test head; The floating adjustment function part also includes an adjustment plate; the adjustment plate is flatly attached to the base plate and directly supports the columnar spring; a second through hole is provided in the adjustment plate for the equal height screw to freely pass through; The floating adjustment function part also includes a spring plunger; the spring plunger is inserted into the load-bearing member; an adapting groove is opened on the base plate; the free end of the spring plunger always elastically presses against the adapting groove; The floating adjustment functional part also includes a transition force transmission member; the transition force transmission member is arranged between the load-bearing member and the base plate; corresponding to the free end of the spring plunger, a slot for inserting the free end of the spring plunger is formed inwardly by the side wall of the transition force transmission member; corresponding to the adaptation groove, the transition force transmission member extends outward to form a supporting arc surface.

2. An air intake pipe assembly sealing test device, characterized in that: The invention comprises a bottom plate, a clamping tool, a pressing unit, a first airtightness test unit, a second airtightness test unit and a flange plate plugging unit; the clamping tool is fixed on the bottom plate; the pressing unit is also fixed on the bottom plate and arranged behind the clamping tool; after the air intake pipe assembly is positioned on the clamping tool, the pressing unit is used to press and limit the air intake pipe assembly; the first airtightness test unit and the second airtightness test unit are both fixed on the bottom plate and arranged side by side on the left side of the clamping tool, so as to respectively To achieve the blocking of the two air outlet pipes of the air intake pipe assembly; the flange plate blocking unit is also fixed on the base plate and arranged on the right side of the clamping tooling to achieve the blocking of the flange plate on the air intake pipe of the air intake pipe assembly; the first air tightness test unit includes a first linear drive unit and a first floating airtightness test assembly; the second airtightness test unit includes a second linear drive unit and a second floating airtightness test assembly; the first floating airtightness test assembly and the second floating airtightness test assembly are both floating airtightness test assemblies as described in claim 1.

3. The air intake pipe assembly sealing test equipment according to claim 2, characterized in that: The clamping unit includes a linear swing clamping cylinder, a pressing arm and a pressing head assembly; the pressing arm is arranged directly above the clamping tooling, and swings under the driving force of the linear swing clamping cylinder to achieve the clamping / relaxation of the intake pipe assembly; the pressing head assembly is fixed on the pressing arm and is directly aligned with the intake pipe assembly.

4. The air intake pipe assembly sealing test equipment according to claim 3, characterized in that: The pressure head assembly includes a pressure bolt and a locking nut; the pressure bolt is screwed and fixed on the pressure arm, and the locking nut is screwed on the pressure bolt; when the locking nut is pressed against the pressure arm, the axial displacement of the pressure bolt is locked.

5. The air intake pipe assembly sealing test equipment according to claim 2, characterized in that: The flange plate sealing unit includes a third linear drive unit, a fourth linear drive unit and a sealing pressure head; the sealing pressure head moves in the left and right directions and the up and down directions respectively under the driving force of the third linear drive unit and the fourth linear drive unit until the flange plate on the intake pipe of the intake pipe assembly is sealed.

6. The air intake pipe assembly sealing test equipment according to claim 5, characterized in that: The flange plate blocking unit also includes an elastic rubber pad; the elastic rubber pad is attached to the lower plane of the blocking pressure head.

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