CN113586569A - Assembly method of exhaust pipe - Google Patents
Assembly method of exhaust pipe Download PDFInfo
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- CN113586569A CN113586569A CN202110795262.1A CN202110795262A CN113586569A CN 113586569 A CN113586569 A CN 113586569A CN 202110795262 A CN202110795262 A CN 202110795262A CN 113586569 A CN113586569 A CN 113586569A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 106
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 47
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 10
- 230000001681 protective effect Effects 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 238000012797 qualification Methods 0.000 claims description 9
- 230000004323 axial length Effects 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- 239000000779 smoke Substances 0.000 abstract description 8
- 238000010073 coating (rubber) Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 241000973497 Siphonognathus argyrophanes Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B11/00—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
- F16B11/006—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding by gluing
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- Exhaust Silencers (AREA)
Abstract
The invention discloses an assembly method of an exhaust pipe, which comprises the following steps: 1) detecting the conical surface inclination angle of the upstream exhaust pipe by using a flanging detection tool, and detecting the conical surface inclination angle of the downstream exhaust pipe by using a bulging pipe detection tool; selecting an upstream exhaust pipe and a downstream exhaust pipe which reach the standard; 2) attaching the inner wall of the conical sealing gasket into a sealing gasket tool, and tearing off a white protective film on the gluing surface of the outer wall of the conical sealing gasket; 3) clamping a sealing gasket tool on a flanging pipe opening of an upstream exhaust pipe; 4) pulling out the sealing gasket tool, and inserting the bulging pipe orifice into the flanging pipe orifice for concentric assembly; 5) installing a V-shaped clamp at the joint of the flanging pipe orifice and the bulging pipe orifice and tightening by using a fixed-torque electric gun; qualified upstream and downstream exhaust pipes are screened through the flanging detection tool and the bulging detection tool, and the conical sealing gasket is installed in the conical sealing gasket by utilizing the sealing gasket tool, so that the concentricity of the conical sealing gasket and the upstream exhaust pipe is ensured, and the problem of smoke leakage at the assembly position after the upstream exhaust pipe and the downstream exhaust pipe are assembled is solved.
Description
Technical Field
The invention belongs to the technical field of exhaust pipe assembly, and particularly relates to an assembly method of an exhaust pipe.
Background
In order to promote the development of the automobile industry and improve the air quality, the pollutant emission standard of the motor vehicle at the sixth stage of China (national standard for short) is implemented in the field of heavy trucks at present so as to strengthen the pollution prevention and control work of the motor vehicle. In the six national Diesel engine emissions, the technical route of EGR (Exhaust Gas Recirculation) + DOC (Oxidation Catalyst) + DPF (Particulate trap) + SCR (Selective Catalytic Reduction) is generally adopted, wherein DPF is used for reducing most of Particulate matters generated by Diesel engines.
When the DPF is in operation, exhaust gas is allowed to flow through a honeycomb bag type particulate trap, the flow can pass through the walls, and the particulates are trapped within the bag. To avoid plugging failure due to excessive particulate in the DPF, the carbon particulates must be removed by active regeneration. To achieve the active regeneration function, the temperature in the exhaust pipe needs to be 600 ℃ for high-temperature oxidation of the captured carbon particles. However, the conventional exhaust pipe often fails to regenerate as a result of assembly, and the main factor is that smoke leakage occurs at the joint of the upstream exhaust pipe and the downstream exhaust pipe, so that the temperature in the exhaust pipe is too low to successfully complete the active regeneration function.
The main factors causing the problem of smoke leakage are as follows: firstly, when the flanging pipe orifice of the upstream exhaust pipe and the bulging pipe orifice of the downstream exhaust pipe are actually manufactured, the inclination angle of the conical surface is not well guaranteed, and the deviation is large, so that the flanging pipe orifice, the bulging pipe orifice and the sealing gasket cannot be well attached to each other during assembly, certain gaps exist, and smoke leakage is caused; secondly, when the conical sealing gasket is installed, the concentricity of the conical sealing gasket with the upstream exhaust pipe and the concentricity of the conical sealing gasket with the downstream exhaust pipe are poor, and the conical sealing gasket cannot be attached between the upstream exhaust pipe and the downstream exhaust pipe in a centering manner, so that poor sealing performance is caused, and smoke leakage is caused; the main reasons for poor concentricity of the tapered sealing gasket with the upstream exhaust pipe and the downstream exhaust pipe are as follows: when the gluing surface of the conical sealing gasket is pasted in the flanging pipe opening of the upstream exhaust pipe manually, the concentricity of the conical sealing gasket and the flanging pipe opening cannot be guaranteed due to the large error existing in manual operation, and the viscosity of the gluing surface of the conical sealing gasket is influenced, so that the conical sealing gasket is not adjusted well, and the operation error is further increased.
Disclosure of Invention
In view of the deficiencies and drawbacks of the prior art, it is an object of the present invention to provide a method of assembling an exhaust pipe; through screening qualified upstream exhaust pipe, low reaches exhaust pipe to and guarantee the sealed concentricity with the upstream exhaust pipe of toper, solved the problem of leaking cigarette in assembly department after upstream exhaust pipe, low reaches exhaust pipe assembly, and then guarantee the interior temperature of exhaust pipe, guarantee going on of initiative regeneration function.
In order to solve the technical problems, the invention adopts the technical scheme that: an exhaust pipe assembling method is used for assembling and assembling an upstream exhaust pipe, a downstream exhaust pipe, a V-shaped clamp and a conical sealing gasket, and is characterized in that: the method comprises the following steps:
1) detecting the conical surface inclination angle of the flanging pipe orifice of the upstream exhaust pipe by using a flanging detection tool, and detecting the conical surface inclination angle of the bulging pipe orifice of the downstream exhaust pipe by using a bulging pipe detection tool; selecting an upstream exhaust pipe and a downstream exhaust pipe with the cone surface inclination angle reaching the standard, and carrying out subsequent assembly;
2) attaching the inner wall of the conical sealing gasket into a sealing gasket tool, and tearing off a white protective film on the gluing surface of the outer wall of the conical sealing gasket;
3) clamping a sealing gasket tool on a flanging pipe orifice of an upstream exhaust pipe, wherein the gluing surface of the outer wall of the conical sealing gasket is tightly attached to the inner wall of the flanging pipe orifice;
4) pulling out the sealing gasket tool, and then inserting the bulging pipe orifice of the downstream exhaust pipe into the flanging pipe orifice for concentric assembly;
5) and installing a V-shaped clamp at the joint of the flanging pipe orifice and the bulging pipe orifice and tightening by using a fixed-torque electric gun, wherein the fastening torque is controlled within the range of 20 +/-2 Nm.
As a further improvement of the invention, the conical sealing gaskets are respectively in interference fit with the flanging pipe orifice and the bulging pipe orifice.
As a further improvement of the invention, the method for detecting the qualified inclination angle of the conical surface of the flanged pipe orifice by using the flanging detection tool comprises the following steps: the flanging pipe orifice is aligned with a gap formed by two first stop ends of the flanging checking fixture and pushed inwards, the gap formed by two first through ends is aligned and pushed inwards, whether the flanging pipe orifice can pass or not is observed, if the flanging pipe orifice can pass through the gap between the two first through ends and cannot pass through the gap between the two first stop ends, the qualification judgment is carried out.
As a further improvement of the invention, the method for detecting the qualified inclination angle of the conical surface of the tube opening of the bulging pipe by using the bulging detection tool comprises the following steps: the gap that two ends two of aligning the utensil are examined to drum to the drum mouth of pipe and form advances to inside, aligns the gap that two lead to ends two and form and advances to inside, observes the drum mouth of pipe and can pass through, if the drum mouth of pipe can lead to the gap between two ends through two to can not pass through the gap between two ends, then judge qualified.
As a further improvement of the invention, the flanging checking fixture comprises: the device comprises a first connecting rod, wherein a pair of first through ends corresponding to the flanging pipe orifice are arranged at two end parts of one side of the first connecting rod, a pair of first stop ends corresponding to the flanging pipe orifice are arranged at two end parts of the other side of the first connecting rod, the conical surface inclination angle of the first through ends is the maximum limit value of the allowable conical surface inclination angle of the flanging pipe orifice, and the conical surface inclination angle of the first stop ends is the minimum limit value of the allowable conical surface inclination angle of the flanging pipe orifice.
As a further improvement of the invention, the bulge detection tool comprises a second connecting rod, wherein a pair of through ends II corresponding to the bulge pipe openings are arranged at two end parts of one side of the second connecting rod, and a pair of stop ends II corresponding to the bulge pipe openings are arranged at two end parts of the other side of the second connecting rod, the conical surface inclination angles of the two through ends II are the maximum limit value of the allowable conical surface inclination angles of the bulge pipe openings, and the conical surface inclination angles of the two stop ends II are the minimum limit value of the allowable conical surface inclination angles of the bulge pipe openings.
As a further improvement of the invention, the sealing gasket tool comprises a conical tube, a straight tube and a cover plate, wherein the basic sizes of the conical surface inclination angle, the large outer diameter and the axial length of the conical tube are in one-to-one correspondence with the basic sizes of the conical surface inclination angle, the large outer diameter and the axial length of a conical section of the end part close to the bulging tube opening, the difference value between the diameter of the straight tube and the large outer diameter of the conical tube is twice of the wall thickness of the flanging tube opening, and the large diameter end of the conical tube and the straight tube are coaxially welded on the cover plate.
As a further improvement of the invention, the sealing gasket tool further comprises a handle, and the handle is arranged on one side of the cover plate far away from the vertebral canal.
As a further improvement of the invention, the handle is a T-shaped handle and comprises a first round steel and a second round steel, the first round steel and the second round steel are vertically welded into a T-shaped shape, and the other end of the first round steel is welded on the cover plate.
As a further improvement of the invention, the handle can be a U-shaped handle, the U-shaped handle is bent into a U-shaped shape by round steel, and one end of a U-shaped opening of the U-shaped handle is welded on the cover plate.
In summary, the invention has the following beneficial technical effects:
1. in the method for assembling the upstream exhaust pipe and the downstream exhaust pipe, the upstream exhaust pipe with the qualified conical surface inclination angle is screened out by using the flanging gauge, the downstream exhaust pipe with the qualified conical surface inclination angle is screened out by using the bulging gauge, and then subsequent operation is carried out, so that the problem that certain gaps exist between the flanging pipe opening of the upstream exhaust pipe and the bulging pipe opening of the downstream exhaust pipe during assembly of the upstream exhaust pipe and the downstream exhaust pipe due to too large errors of the conical surface inclination angles, and the smoke leakage phenomenon is caused is solved, and the sealing performance of the upstream exhaust pipe and the downstream exhaust pipe after assembly is ensured;
when the assembly toper is sealed, at first pack the one side laminating of the sealed back glue face of toper into in sealed frock of filling up, it clamps together with the turn-ups mouth of pipe to hold sealed frock of filling up again, because sealed frock of filling up is better with the orificial concentricity of turn-ups, thereby can guarantee the sealed pad of toper and the orificial concentricity of turn-ups, it is big with the orificial concentricity error of turn-ups to avoid manual direct sealed gluey face of gluing of toper to install the sealed pad that leads to on the turn-ups mouth of pipe, the leakproofness that causes is not good, thereby arouse the phenomenon of leaking the cigarette, and the leakproofness after upstream exhaust pipe and the assembly of low reaches exhaust pipe is improved.
2. The tapered sealing gasket is in interference fit with the flanging pipe orifice and the bulging pipe orifice, so that the outer wall surface and the inner wall surface of the tapered sealing gasket can be tightly attached to the flanging pipe orifice and the bulging pipe orifice, and no gap is generated.
3. The flanging pipe orifice with the conical surface inclination angle within a certain error range is screened out by utilizing the through end I and the stop end I of the flanging checking fixture, the method is simple, the operation is convenient, the conical surface inclination angle qualification of the flanging pipe orifice needing to be assembled is ensured, and the guarantee is provided for the sealing property between the upstream exhaust pipe and the downstream exhaust pipe after the assembly.
4. The through end II and the stop end II of the bulge detection tool are used for screening the bulge pipe orifice of which the conical surface inclination angle is within a certain error range value, the method is simple, the operation is convenient, the conical surface inclination angle qualification of the bulge pipe orifice to be assembled is ensured, and the guarantee is provided for the sealing property between the upstream exhaust pipe and the downstream exhaust pipe after the assembly.
5. The two sides of the flanging checking fixture are provided with a pair of through ends I with the conical surface inclination angle being the maximum limit value and a pair of end stops I with the conical surface inclination angle being the minimum limit value, the qualification of the flanging pipe orifice can be judged by observing whether the flanging pipe orifice can pass through the through ends I and the end stops I, and the flanging checking fixture is simple in structure, visual and convenient.
6. The bulge detection tool is simple in structure, visual and convenient, and can judge the qualification of the bulge tube mouth by observing whether the bulge tube mouth can pass through the two through ends and the two end ends.
7. Compared with direct manual installation, on one hand, the conical sealing gasket is manually installed on the sealing gasket tool due to the fact that the cover plate of the sealing gasket tool is limited, the concentricity error of the conical sealing gasket and the sealing gasket tool is small, and on the other hand, the concentricity is better guaranteed in a mode that the conical sealing gasket is installed on the outer wall of the cylinder wall than in a mode that the conical sealing gasket is directly installed on the inner wall of the cylinder wall; on the other hand, the sealing gasket tool is inserted into the flanging pipe orifice, and the conical sealing gasket can ensure good concentricity with the flanging pipe orifice under the assistance of further limiting of the sealing gasket tool because the concentricity of the sealing gasket tool and the flanging pipe orifice is good; finally, traditional direct mode of installing the rubber coating face of the sealed pad of toper on the turn-ups mouth of pipe, because the sealed rubber coating face of toper has the stickness, at the in-process of pasting, fold appears easily and drag the not good phenomenon of adjustment in position, install the gum face of the sealed pad of toper earlier on sealed pad frock, then adjust the tiling easily, then utilize sealed pad frock and the orificial assembly of turn-ups, install the sealed pad of toper on the turn-ups mouth of pipe, the concentricity improves greatly, it is level and smooth to paste, and is firm, avoid the sealed poor phenomenon of leakproofness that the sealed pad arouses in the orificial slope of turn-ups.
8. Through setting up the handle, can make things convenient for the people to hold and operate, laborsaving convenience.
Drawings
The invention is further described with reference to the accompanying drawings in which:
FIG. 1 is an exploded view of the assembly of an upstream exhaust pipe, a downstream exhaust pipe, a V-shaped clamp, and a tapered gasket of the present invention;
FIG. 2 is a schematic view of the structure of an upstream exhaust pipe;
FIG. 3 is a schematic view of the structure of the downstream exhaust pipe;
FIG. 4 is a schematic structural view of a flanging tool;
FIG. 5 is a schematic structural diagram of a flanging tool for screening upstream exhaust pipes;
FIG. 6 is a schematic structural view of a bulge detection tool;
FIG. 7 is a schematic structural diagram of a downstream exhaust pipe screened by a bulging test tool;
FIG. 8 is a schematic structural diagram of a gasket fixture according to an embodiment;
FIG. 9 is an exploded view of a gasket fixture assembling a tapered gasket to an upstream exhaust pipe;
FIG. 10 is a schematic structural view of a second gasket fixture according to an embodiment;
FIG. 11 is a schematic view illustrating the angle of the taper;
in the figure: 1 upstream exhaust pipe, 2V type clamp, 3 toper sealed pad, 4 downstream exhaust pipes, 5 turn-ups mouths of tubes, 6 bulging mouths of tubes, 7 sealed pad frock, 71 spinal canal, 72 straight bobbin, 73 handle, 731 round steel one, 732 round steel two, 74 apron, 75U-shaped handle, 8 turn-ups examine utensil, 81 lead to end one, 82 only end one, 83 connecting rod one, 9 bulging examine utensil, 91 lead to end two, 92 only end two, 93 connecting rod two.
Detailed Description
The invention is described in further detail below with reference to figures 1-11,
in addition, the inclination angle of the conical surface in this embodiment refers to an acute angle corresponding to an included angle between a conical line and an axis in a radial section of the flanging pipe orifice 5, the bulging pipe orifice 6, the conical sealing gasket 3, or the sealing gasket tooling 7, that is, an angle value corresponding to each conical degree, as shown in fig. 11.
Example one
The embodiment of the invention discloses an assembly method of an exhaust pipe. Referring to fig. 1 to 9, an exhaust pipe assembling method for assembling an upstream exhaust pipe 1, a downstream exhaust pipe 4, a V-band 2, and a tapered gasket 3, includes the steps of:
1) the inclination angle of the conical surface of the flanging pipe orifice 5 of the upstream exhaust pipe 1 is detected by using a flanging detection tool 8, and the inclination angle of the conical surface of the bulging pipe orifice 6 of the downstream exhaust pipe 4 is detected by using a bulging pipe detection tool 9; selecting an upstream exhaust pipe 1 and a downstream exhaust pipe 4 with the cone surface inclination angle up to the standard, and carrying out subsequent assembly;
2) attaching the inner wall of the conical sealing gasket 3 into a sealing gasket tool 7, and tearing off a white protective film on the gluing surface of the outer wall of the conical sealing gasket 3;
3) clamping a sealing gasket tool 7 on a flanging pipe orifice 5 of the upstream exhaust pipe 1, wherein the gluing surface of the outer wall of the conical sealing gasket 3 is tightly attached to the inner wall of the flanging pipe orifice 5;
4) pulling out the sealing gasket tooling 7, and then inserting the bulging pipe opening 6 of the downstream exhaust pipe 4 into the flanging pipe opening 5 for concentric assembly;
5) and installing the V-shaped clamp 2 at the joint of the flanging pipe orifice 5 and the bulging pipe orifice 6 and tightening by using a fixed-torque electric gun, wherein the fastening torque is controlled within the range of 20 +/-2 Nm.
In addition, in order to improve the sealing performance, the tapered seal 3 is in interference fit with the burring pipe opening 5 and the bulging pipe opening 6 respectively.
In the step 1), the method for detecting the qualified inclination angle of the conical surface of the flanged pipe orifice 5 by using the flanging detection tool 8 comprises the following steps: aim at the turn-ups mouth of pipe 5 respectively and aim at the turn-ups and examine the clearance that two only ends 82 of 8 formed and impel inwards, aim at the clearance that two lead to ends 81 formed and impel inwards, observe the turn-ups mouth of pipe 5 and can pass through, if the turn-ups mouth of pipe 5 can lead to the clearance between the end 81 through two to can not pass through the clearance between two only ends 82, then judge qualified, all the other is judged unqualifiedly. The flanging pipe orifice 5 within a certain error range is screened out by using the through end I81 and the end I82 of the flanging checking fixture 8, the method is simple, the operation is convenient, the conical surface inclination angle qualification of the flanging pipe orifice 5 to be assembled is ensured, and the sealing performance between the upstream exhaust pipe 1 and the downstream exhaust pipe 4 after the assembly is ensured.
The method for detecting the qualified inclination angle of the conical surface of the bulging pipe opening 6 by using the bulging detection tool 9 comprises the following steps: the gap that two ends two 92 formed of utensil 9 are examined to the drum mouth of pipe 6 alignment respectively and rise advances inwards, aligns the gap that two ends two 91 formed and advances inwards, observes the drum mouth of pipe 6 and can pass through, if the drum mouth of pipe 6 can pass through the gap between two ends two 91 to can not pass through the gap between two ends two 92, then judge qualified. And judging the rest parts to be unqualified. The through end II 91 and the end II 92 of the bulge detection tool 9 are utilized to screen the bulge pipe orifice 6 within a certain error range value, the method is simple, the operation is convenient, the conical surface inclination angle qualification of the bulge pipe orifice 6 to be assembled is ensured, and the sealing performance between the upstream exhaust pipe 1 and the downstream exhaust pipe 4 after the assembly is guaranteed.
In this embodiment, referring to fig. 4 and 5, the flanging testing fixture 8 has the following specific structure: the flanging pipe mouth 5 conical surface inclination angle limiting device comprises a first connecting rod 83, wherein a pair of first through ends 81 corresponding to the flanging pipe mouth 5 are arranged at two end parts of one side of the first connecting rod 83, and a pair of first stop ends 82 corresponding to the flanging pipe mouth 5 are arranged at two end parts of the other side of the first connecting rod 83, the conical surface inclination angle of the first through ends 81 is the maximum limiting value of the allowable conical surface inclination angle of the flanging pipe mouth 5, and the conical surface inclination angle of the first stop ends 82 is the minimum limiting value of the allowable conical surface inclination angle of the flanging pipe mouth 5. In order to ensure the sealing performance, in this embodiment, the tolerance range of the conical surface inclination angle of the flanged pipe orifice 5 is limited within ± 0.5 °, the conical surface inclination angles of the two first through ends 81 are the basic size of the conical surface inclination angle of the flanged pipe orifice 5 plus 0.5 °, the conical surface inclination angles of the two first stop ends 82 are the basic size of the conical surface inclination angle of the flanged pipe orifice 5 minus 0.5 °, if the flanged pipe orifice 5 can pass through the gap between the two first through ends 81 and cannot pass through the gap between the two first stop ends 82, the flanged pipe orifice is determined to be qualified, and the rest of the flanged pipe orifices are determined to be unqualified. The inclination angle of the conical surface of the screened flanged pipe orifice 5 fluctuates within the range of +/-0.5 degrees of the basic size, and the sealing performance of the flanged pipe orifice 5 within the tolerance range is basically not influenced during assembly.
The two sides of the flanging gauge 8 are provided with a pair of through ends 81 with the conical surface inclination angle being the maximum limit value and a pair of end ends 82 with the conical surface inclination angle being the minimum limit value, the qualification of the flanging pipe orifice 5 can be judged by observing whether the flanging pipe orifice 5 can pass through the through ends 81 and the end ends 82, and the flanging gauge is simple in structure, visual and convenient.
Similar to the principle of the flanging gauge 8, referring to fig. 6 and 7, the bulge gauge 9 comprises a second connecting rod 93, a pair of through ends two 91 corresponding to the bulge pipe openings 6 are arranged at two end portions of one side of the second connecting rod 93, and a pair of end stopping two 92 corresponding to the bulge pipe openings 6 are arranged at two end portions of the other side of the second connecting rod 93, wherein the conical surface inclination angles of the two through ends two 91 are the maximum limit value of the allowable conical surface inclination angles of the bulge pipe openings 6, and the conical surface inclination angles of the two end stopping two 92 are the minimum limit value of the allowable conical surface inclination angles of the bulge pipe openings 6. In order to ensure the sealing performance, in this embodiment, the tolerance range of the inclination angle of the conical surface of the tubular opening 6 is limited within ± 0.5 °, the inclination angles of the conical surfaces of the two through ends two 91 are the basic size of the inclination angle of the conical surface of the tubular opening 6 plus 0.5 °, the inclination angles of the conical surfaces of the two end stops two 92 are the basic size of the inclination angle of the conical surface of the tubular opening 6 minus 0.5 °, if the tubular opening 6 can pass through the gap between the two through ends two 91, but cannot pass through the gap between the two end stops two 92, the determination is qualified, and the others are all determined to be unqualified. The inclination angle of the conical surface of the screened rising nozzle 6 fluctuates within the range of the basic size ± 0.5 °, and the sealing performance of the rising nozzle 6 within the tolerance range is not substantially affected during assembly.
Referring to fig. 8, the sealing gasket tooling 7 comprises a conical tube 71 and a straight tube 72, wherein one end of the conical tube 71 with a large diameter is connected with the end of the straight tube 72, and the basic sizes of the conical surface inclination angle, the outer diameter and the axial length of the conical tube 71 are the same as the basic sizes of the conical surface inclination angle, the outer diameter and the axial length of the conical section of the end part, close to the bulging tube opening 6, in a one-to-one correspondence manner.
In addition, in order to facilitate hand holding and operation, a cover plate 74 is arranged at one end, connected with the vertebral canal 71, of the straight cylindrical pipe 72, a welding handle is fixedly arranged on the outer wall of the cover plate 74, in the embodiment, the handle is designed to be a T-shaped handle 73 and comprises a first round steel 731 and a second round steel 732, the first round steel 731 and the second round steel 732 are perpendicularly welded to form a T-shaped structure, and the other end of the first round steel 731 is welded to the cover plate 74.
When the sealing gasket tool 7 is used, one side of the back adhesive surface of the conical sealing gasket 3 is firstly installed on the outer wall of the conical tube 71 of the sealing gasket tool 7, the connection position of the conical tube 71 and the straight tube 72 is limited, the conical sealing gasket 3 can be accurately and comfortably installed on the sealing gasket tool 7, then the protective film of the adhesive surface on the other side of the conical sealing gasket 3 is torn off, the flanging tube opening 5 is inserted between the conical tube 71 and the straight tube 72 of the sealing gasket tool 7 until the limiting position is reached, then the conical tube 71 is pulled down, the adhesive surface of the conical sealing gasket 3 is adhered to the inner wall of the flanging tube opening 5, the small uneven part is manually smoothed out continuously, and the smooth and flat of the conical sealing gasket is ensured. Compared with direct manual installation, on one hand, the conical sealing gasket 3 is manually installed on the sealing gasket tool 7 because the cover plate 74 of the sealing gasket tool 7 has limited position, the concentricity error of the conical sealing gasket 3 and the sealing gasket tool 7 is smaller, and in addition, the concentricity is better ensured in the mode that the conical sealing gasket is installed on the outer wall of the cylinder wall than in the mode that the conical sealing gasket is directly installed on the inner wall of the cylinder wall; then, the sealing gasket tool 7 is inserted into the flanging pipe orifice 5, and because the concentricity of the sealing gasket tool 7 and the flanging pipe orifice 5 is good, the conical sealing gasket 3 and the flanging pipe orifice 5 can ensure good concentricity with each other under the assistance of further limiting of the sealing gasket tool 7; on the other hand, the mode on turn-ups mouth of pipe 5 is installed with the rubber coating face of the sealed 3 of toper directly to traditional, because the sealed 3 rubber coating face of toper has the stickness, at the in-process of pasting, fold appears easily and drag the not good phenomenon of adjustment in position, install the gum face of the sealed 3 of toper earlier on sealed pad frock 7, then adjust easily and pave, then utilize the sealed assembly of filling up 7 with turn-ups mouth of pipe 5, install the sealed 3 of toper on turn-ups mouth of pipe 5, the concentricity improves greatly, it is level and smooth to paste, and is firm, avoid the sealed poor phenomenon of leakproofness that 3 arouses at the incline of turn-ups mouth of pipe 5 of toper sealed pad.
In summary, the invention has the following beneficial technical effects:
in the method for assembling the upstream exhaust pipe 1 and the downstream exhaust pipe 4, firstly, the upstream exhaust pipe 1 with a qualified conical surface inclination angle is screened out by using the flanging checking fixture 8, the downstream exhaust pipe 4 with a qualified conical surface inclination angle is screened out by using the bulging checking fixture 9, and then subsequent operation is carried out, so that the phenomenon that smoke leakage is caused due to a certain gap existing between the flanging pipe orifice 5 of the upstream exhaust pipe 1 and the bulging pipe orifice 6 of the downstream exhaust pipe 4 during assembly because the error of the conical surface inclination angle is too large can be greatly reduced, and the sealing performance of the upstream exhaust pipe 1 and the downstream exhaust pipe 4 after assembly is ensured;
when the conical sealing gasket 3 is assembled, firstly, one surface of the back adhesive surface of the conical sealing gasket 3 is attached and arranged in the sealing gasket tool 7, then the sealing gasket tool 7 is held by hand and clamped with the flanging pipe orifice 5, because the concentricity of the sealing gasket tooling 7 and the flanging pipe orifice 5 is better, the concentricity of the conical sealing gasket 3 and the flanging pipe orifice 5 can be ensured, the phenomenon that the sealing performance is poor and the smoke leakage is caused due to the large concentricity error of the conical sealing gasket 3 and the flanging pipe orifice 5 caused by manually and directly installing the gluing surface of the conical sealing gasket 3 on the flanging pipe orifice 5 is avoided, on the other hand, because the stickness of the rubber coating surface of the conical sealing gasket 3, the gum surface of the conical sealing gasket 3 is installed on the sealing gasket tool 7, and the rubber coating surface of the conical sealing gasket 3 is installed on the inner wall of the flanging pipe opening 5 more easily to be adjusted, so that the sealing performance of the upstream exhaust pipe 1 and the downstream exhaust pipe 4 after being assembled is improved.
Example two
Referring to fig. 10, the handle of the gasket fixture is a U-shaped handle 75, the U-shaped handle 75 is bent into a U-shape by round steel, and one end of the U-shaped opening of the U-shaped handle 75 is welded to the cover plate 74. The rest is the same as in example 1.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only, since various other embodiments will become apparent to those skilled in the art upon reference to the following detailed description.
Claims (10)
1. An exhaust pipe assembling method is used for assembling and assembling an upstream exhaust pipe (1), a downstream exhaust pipe (4), a V-shaped clamp (2) and a conical sealing gasket (3), and is characterized in that: the method comprises the following steps:
1) the conical surface inclination angle of the flanging pipe orifice (5) of the upstream exhaust pipe (1) is detected by using a flanging detection tool (8), and the conical surface inclination angle of the bulging pipe orifice (6) of the downstream exhaust pipe (4) is detected by using a bulging pipe detection tool (9); selecting an upstream exhaust pipe (1) and a downstream exhaust pipe (4) with the cone surface inclination angle up to the standard, and carrying out subsequent assembly;
2) attaching the inner wall of the conical sealing gasket (3) into a sealing gasket tool (7), and tearing off a white protective film on the gluing surface of the outer wall of the conical sealing gasket (3);
3) clamping a sealing gasket tool (7) on a flanging pipe orifice (5) of an upstream exhaust pipe (1), wherein the glue spreading surface of the outer wall of the conical sealing gasket (3) is tightly attached to the inner wall of the flanging pipe orifice (5);
4) pulling out the sealing gasket tool (7), and then inserting the bulging pipe opening (6) of the downstream exhaust pipe (4) into the flanging pipe opening (5) for concentric assembly;
5) and a V-shaped clamp (2) is arranged at the joint of the flanging pipe orifice (5) and the bulging pipe orifice (6) and is tightened by using a fixed-torque electric gun, wherein the fastening torque is controlled within the range of 20 +/-2 Nm.
2. The method of assembling an exhaust pipe according to claim 1, wherein: the conical sealing gasket (3) is in interference fit with the flanging pipe orifice (5) and the bulging pipe orifice (6) respectively.
3. The method of assembling an exhaust pipe according to claim 1, wherein: the method for detecting the qualified conical surface inclination angle of the flanging pipe orifice (5) by using the flanging detection tool (8) comprises the following steps: align turn-ups mouth of pipe (5) and the clearance that two only ends one (82) formed of turn-ups examine utensil (8) and impel inwards, aim at the clearance that two lead to end one (81) formed and impel inwards, observe the turn-ups mouth of pipe (5) and can pass through, if turn-ups mouth of pipe (5) can lead to the clearance between end one (81) through two to can not pass through the clearance between two only ends one (82), then judge qualified.
4. The method of assembling an exhaust pipe according to claim 1, wherein: the method for detecting the qualification of the inclined angle of the conical surface of the bulging pipe opening (6) by using the bulging detection tool (9) comprises the following steps: the gap that two ends two (92) that will rise mouth of pipe (6) aim at the drum and examine utensil (9) and form advances to inside, aim at the gap that two lead to ends two (91) and advance to inside, observe the mouth of pipe (6) of the drum and can pass through, if rise mouth of pipe (6) can pass through the gap between two ends two (91) to can not pass through the gap between two ends two (92), then judge qualified.
5. The method of assembling an exhaust pipe according to claim 3, wherein: the flanging checking fixture (8) comprises a first connecting rod (83), a pair of first through ends (81) corresponding to the flanging pipe orifice (5) are arranged at two end parts of one side of the first connecting rod (83), and a pair of first stop ends (82) corresponding to the flanging pipe orifice (5) are arranged at two end parts of the other side of the first connecting rod (83), wherein the conical surface inclination angles of the first through ends (81) are the maximum limit value of the allowable conical surface inclination angles of the flanging pipe orifice (5), and the conical surface inclination angles of the first stop ends (82) are the minimum limit value of the allowable conical surface inclination angles of the flanging pipe orifice (5).
6. The method of assembling an exhaust pipe according to claim 4, wherein: the bulge detection tool (9) comprises a second connecting rod (93), a pair of second through ends (91) corresponding to the bulge pipe openings (6) are arranged at two end parts of one side of the second connecting rod (93), and a pair of second stopping ends (92) corresponding to the bulge pipe openings (6) are arranged at two end parts of the other side of the second connecting rod (93), wherein the conical surface inclination angles of the two through ends (91) are the maximum limit value of the allowable conical surface inclination angles of the bulge pipe openings (6), and the conical surface inclination angles of the two stopping ends (92) are the minimum limit value of the allowable conical surface inclination angles of the bulge pipe openings (6).
7. The method of assembling an exhaust pipe according to claim 1, wherein: sealed frock of filling up (7) includes canalis spinalis (71), straight bobbin (72) and apron (74), the conical surface inclination angle of canalis spinalis (71), major diameter, the basic dimension of axial length and the conical surface inclination angle of the conical section that the mouth of pipe (6) of bulging is close to the tip, major diameter, the basic dimension one-to-one of axial length is the same, the diameter of straight bobbin (72) is 2 times of the wall thickness of turn-ups mouth of pipe 5 with the difference of the major diameter of canalis spinalis (71), canalis spinalis (71) major diameter one end and straight bobbin (72) are with the axle center welding on apron (74).
8. The method of assembling an exhaust pipe according to claim 7, wherein: the sealing gasket tool (7) further comprises a handle, and the handle is arranged on one side, far away from the vertebral canal 71, of the cover plate (74).
9. The method of assembling an exhaust pipe according to claim 8, wherein: the handle is T-shaped handle (73), and comprises a first round steel (731) and a second round steel (732), wherein the first round steel (731) and the second round steel (732) are vertically welded into a T-shaped shape, and the other end of the first round steel (731) is welded on the cover plate (74).
10. The method of assembling an exhaust pipe according to claim 8, wherein: the handle be U-shaped handle (75), U-shaped handle (75) are bent into the U-shaped shape by the round steel, U-shaped handle (75) U-shaped open-ended one end welding is on apron (74).
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| CN202110795262.1A CN113586569A (en) | 2021-07-14 | 2021-07-14 | Assembly method of exhaust pipe |
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| CN202110795262.1A CN113586569A (en) | 2021-07-14 | 2021-07-14 | Assembly method of exhaust pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118452166A (en) * | 2024-07-10 | 2024-08-09 | 杭州同华生态环境科技有限公司 | Plankton sampling device |
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