CN113820245B - Automatic on-line weighing system of honeycomb coating applied to automobile exhaust gas exhaust system - Google Patents
Automatic on-line weighing system of honeycomb coating applied to automobile exhaust gas exhaust system Download PDFInfo
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- CN113820245B CN113820245B CN202111075969.1A CN202111075969A CN113820245B CN 113820245 B CN113820245 B CN 113820245B CN 202111075969 A CN202111075969 A CN 202111075969A CN 113820245 B CN113820245 B CN 113820245B
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- 238000000576 coating method Methods 0.000 title claims abstract description 107
- 239000011248 coating agent Substances 0.000 title claims abstract description 105
- 238000005303 weighing Methods 0.000 title claims abstract description 41
- 238000005086 pumping Methods 0.000 claims abstract description 45
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000000969 carrier Substances 0.000 claims abstract description 5
- 239000005002 finish coating Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 33
- 239000003973 paint Substances 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000001413 cellular effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 14
- 239000003054 catalyst Substances 0.000 description 12
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
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- Pathology (AREA)
- Coating Apparatus (AREA)
Abstract
The invention discloses an automatic on-line weighing system of a honeycomb coating applied to an automobile exhaust system in the field of exhaust treatment, which comprises a workbench for bearing a honeycomb carrier, wherein a weighing assembly for weighing the carrier before and after coating is arranged in the center of the workbench, a coating supply mechanism is arranged right below the workbench, a fixing mechanism for fixing the carrier and a vacuum material pumping mechanism for pumping the coating are arranged above the workbench, and the coating is pumped from the coating supply mechanism to the carrier fixed by the fixing mechanism by negative pressure of the vacuum material pumping mechanism to finish coating; the weighing assembly adjusts the negative pressure of the vacuum pumping mechanism during pumping according to the weight difference of the carriers before and after coating. The invention can respectively and automatically weigh the honeycomb carrier before and after coating, judge whether the coating is uniformly and completely coated according to the weight of the carrier before and after coating, and adjust the coating amount of the coating according to the weight difference of the carrier before and after coating.
Description
Technical Field
The invention belongs to the field of tail gas treatment, and particularly relates to an automatic on-line weighing system for a honeycomb coating applied to an automobile tail gas exhaust system.
Background
As one of the main sources of air pollution, automobile exhaust contains a large amount of harmful substances including carbon monoxide, nitrogen oxides, hydrocarbons, solid suspended particles and the like, and PM2.5, which has recently become a focus of social attention, belongs to the category of solid suspended particles. Automobile exhaust is one of the main sources of PM2.5 in large cities and one of the most serious factors for the pollution of the air in many cities. With the rapid development of economy in recent years, a large number of large cities and a plurality of ultra-large cities which overtake the world level appear in China, and the development process of urban maximization is inevitably accompanied with the surge of the conservation quantity of motor vehicles, so that huge pressure is brought to the atmospheric environment.
An automobile with the tail gas reaching the standard needs an exhaust system with excellent performance indexes to support, namely an excellent three-way catalyst is needed to treat the exhaust gas exhausted by the automobile, wherein the honeycomb coating is a core component in the automobile tail gas catalyst, and whether the honeycomb coating is uniformly and completely coated can finally influence the performance and service life of the catalyst, so that the detection of whether the honeycomb coating is uniformly and completely coated is needed when the honeycomb carrier is coated and produced at present.
The invention provides an automatic on-line weighing system for honeycomb coating applied to an automobile exhaust system, which can be used for respectively and automatically weighing a honeycomb carrier before and after coating, judging whether the coating is uniformly and completely coated according to the weight of the carrier before and after coating, and adjusting the coating amount of the coating according to the weight difference of the carrier before and after coating, thereby avoiding the influence of the too small coating amount on the exhaust treatment efficiency of a catalyst; and the waste of the coating caused by the overlarge coating amount is avoided, the cost is increased, even honeycomb channels on the carrier are blocked, and the tail gas treatment efficiency of the catalyst is affected.
Disclosure of Invention
The invention aims to provide an automatic on-line weighing system for a honeycomb coating applied to an automobile exhaust system, so as to solve the problem that the prior art has disadvantages in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the automatic on-line honeycomb coating weighing system comprises a workbench for bearing a honeycomb carrier, wherein a weighing assembly for weighing the carrier before and after coating is arranged in the center of the workbench, a coating supply mechanism is arranged right below the workbench, a fixing mechanism for fixing the carrier and a vacuum material pumping mechanism for pumping the coating are arranged above the workbench, and the coating is pumped into the carrier fixed by the fixing mechanism from the coating supply mechanism by negative pressure of the vacuum material pumping mechanism to finish coating; the weighing assembly adjusts the negative pressure of the vacuum pumping mechanism during pumping according to the weight difference value of the carriers before and after coating;
the vacuum material pumping mechanism comprises a vacuum cover arranged right above the fixing mechanism, the vacuum cover is connected with a driving cylinder fixed on the frame, and the driving cylinder drives the vacuum cover to move vertically; the inner wall of the vacuum cover is vertically and slidably provided with a negative pressure plate, the lower part of the vacuum cover is provided with a sealing section, and the negative pressure plate vertically slides in the sealing section; the negative pressure plate is fixedly provided with a fixing rod, the fixing rod is provided with a driving unit, and the driving unit drives the negative pressure plate to vertically move through the fixing rod to form negative pressure absorbing paint.
As a further scheme of the invention, the fixing mechanism comprises a fixing ring vertically and slidably arranged on the workbench, and an air inflation assembly used for clamping the carrier is arranged in the fixing ring and is used for inflating and clamping the carrier in the process of coating the coating; the upper end of the fixed ring is fixedly connected with the lower end of the vacuum cover in a sealing way; after the driving cylinder drives the fixing ring to move to the periphery of the carrier, the expansion assembly inflates and clamps the carrier; the expansion assembly expands to form a seal between the inner side of the retaining ring and the outer periphery of the carrier after inflation.
As a further scheme of the invention, the driving unit comprises a driving gear externally connected with a driving source; the outer peripheral wall of the fixed rod is provided with a threaded section, the outer periphery of the fixed rod is sleeved with a threaded sleeve, the threaded sleeve is in threaded connection with the threaded section, and the threaded sleeve is rotatably arranged on the inner top surface of the vacuum cover; the driving gear is fixedly arranged on the periphery of the screw sleeve.
As a further scheme of the invention, the driving unit comprises an external driving source and a driving gear rotatably arranged on the inner top surface of the vacuum cover, a supporting rod is further arranged between the driving gear and the negative pressure plate, one end ball head of the supporting rod is hinged to the lower tooth surface of the driving gear, and the other end ball head is hinged to the upper end surface of the negative pressure plate.
As a further aspect of the present invention, there is further provided a stirring mechanism for stirring the paint in the paint supply mechanism before the coating; the stirring mechanism comprises an annular gear, a planetary gear and a driving gear externally connected with a power supply; the inner gear ring is fixedly connected with the driving cylinder, the vacuum cover is fixedly arranged on the inner gear ring, and the fixed ring is connected with the driving cylinder through the vacuum cover and the inner gear ring; a driving gear is coaxially and rotatably arranged in the middle of the inner gear ring, planetary gears are arranged at intervals on the periphery of the driving gear, the planetary gears are meshed with the driving gear and the inner gear ring, stirring rods are coaxially arranged on the planetary gears, one ends of the stirring rods are connected with planetary gear keys, and the other ends of the stirring rods are inserted into a paint supply mechanism to stir paint; the fixed ring is vertically and slidably arranged on the stirring rod.
As a further scheme of the invention, the vacuum material-pumping device further comprises a control mechanism for adjusting the magnitude of negative pressure when the vacuum material-pumping mechanism is used for coating by changing the moving amount of the negative pressure plate; the driving gear is connected with an external driving source through a control mechanism, the control mechanism comprises a metering gear meshed with the driving gear, the metering gear is an incomplete gear, the control mechanism receives signals transmitted by the weighing assembly, and the metering gear is driven to rotate positively and reversely according to the deviation degree of the weight difference value of the front carrier and the rear carrier which are weighed twice and a preset standard value.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the honeycomb carrier can be automatically weighed before and after being coated, whether the coating is uniformly and completely coated or not is judged according to the weight of the carrier before and after the coating, and the coating amount of the coating is regulated according to the weight difference of the carrier before and after the coating, so that the influence of the too small coating amount of the coating on the tail gas treatment efficiency of the catalyst is avoided; and the waste of the coating caused by the overlarge coating amount is avoided, the cost is increased, even honeycomb channels on the carrier are blocked, and the tail gas treatment efficiency of the catalyst is affected.
The stirring mechanism provided by the invention can stir the coating before the carrier is coated, so that the problem that the fluidity of the coating in the coating supply mechanism is reduced due to long-time standing is avoided, and the material pumping of the subsequent vacuum material pumping mechanism is influenced.
Compared with the method for controlling the negative pressure of the vacuum material pumping mechanism during drawing the paint by adjusting the moving distance of the negative pressure plate, the method has the advantages that the moving distance of the negative pressure plate is certain, and the phenomenon that the error superposition is caused by repeated adjustment and displacement of the negative pressure plate is avoided. In addition, the invention can adjust the initial position of the negative pressure plate to ensure that the negative pressure adjustment range is wider and the applicability is increased.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of an automated on-line weighing system for honeycomb coatings of the present invention;
FIG. 2 is a schematic diagram of an automatic on-line weighing system of the present invention in semi-section;
FIG. 3 is an enlarged view of a portion A of FIG. 2 in accordance with the present invention;
FIG. 4 is a schematic structural view of a vacuum pumping mechanism according to the present invention;
FIG. 5 is an enlarged view of a portion B of FIG. 4 in accordance with the present invention;
fig. 6 is an enlarged view of a portion C of fig. 4 in accordance with the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1-carrier, 2-workbench, 3-weighing assembly, 4-coating supply mechanism, 5-fixing mechanism, 51-fixed ring, 52-expansion assembly, 53-driving cylinder, 6-vacuum pumping mechanism, 61-vacuum hood, 611-sealing section, 62-negative pressure plate, 63-fixed rod, 64-driving gear, 65-threaded section, 66-screw sleeve, 67-supporting rod, 7-stirring mechanism, 71-annular gear, 72-driving gear, 73-planetary gear, 74-stirring rod, 8-control mechanism, 81-metering gear.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-8, an automatic on-line weighing system for honeycomb coating applied to an automobile exhaust system comprises a workbench 2 for bearing a honeycomb carrier 1, wherein a weighing assembly 3 for weighing the carrier 1 before and after coating is arranged in the center of the workbench 2, a coating supply mechanism 4 is arranged right below the workbench 2, a fixing mechanism 5 for fixing the carrier 1 and a vacuum material sucking mechanism 6 for sucking coating are arranged above the workbench 2, and the vacuum material sucking mechanism 6 sucks the coating from the coating supply mechanism 4 to the carrier 1 fixed by the fixing mechanism 5 under negative pressure to finish coating; the weighing assembly 3 adjusts the negative pressure of the vacuum pumping mechanism 6 during pumping according to the weight difference value of the carriers 1 before and after coating;
the vacuum pumping mechanism 6 comprises a vacuum cover 61 arranged right above the fixing mechanism 5, the vacuum cover 61 is connected with a driving cylinder 53 fixed on the frame, and the driving cylinder 53 drives the vacuum cover to move vertically; a negative pressure plate 62 is vertically and slidably arranged on the inner wall of the vacuum cover 61, a sealing section 611 is arranged at the lower part of the vacuum cover 61, and the negative pressure plate 62 vertically slides in the sealing section 611; the negative pressure plate 62 is fixedly provided with a fixing rod 63, the fixing rod 63 is provided with a driving unit, and the driving unit drives the negative pressure plate 62 to vertically move through the fixing rod 63 to form negative pressure absorbing paint.
An automobile with the tail gas reaching the standard needs an exhaust system with excellent performance indexes to support, namely an excellent three-way catalyst is needed to treat the exhaust gas exhausted by the automobile, wherein the honeycomb coating is a core component in the automobile tail gas catalyst, and whether the honeycomb coating is uniformly and completely coated can finally influence the performance and service life of the catalyst, so that the detection of whether the honeycomb coating is uniformly and completely coated is needed when the honeycomb carrier 1 is coated and produced at present. As shown in fig. 1, the invention provides an automatic on-line weighing system for a honeycomb coating applied to an automobile exhaust system, which can automatically weigh a honeycomb carrier 1 before and after coating the carrier 1, and judge whether the coating is uniformly and completely coated according to the weight of the carrier 1 before and after coating.
As shown in fig. 1, when the invention works, firstly, an uncoated carrier 1 is moved to a weighing assembly at the center of a workbench 2, and the weighing assembly performs first weighing and records data; then the fixing mechanism 5 clamps and fixes the carrier 1 on the workbench 2, so that the carrier 1 is prevented from being displaced in the subsequent coating process to influence the coating. Then the vacuum material-pumping mechanism 6 starts to work, as shown in fig. 1 and 2, the driving cylinder 53 drives the vacuum cover 61 to move downwards to cover the upper end of the carrier 1 completely, at this time, the negative pressure plate 62 is located at the low position of the vacuum cover 61, and the connection part between the vacuum cover 61 and the carrier 1 is sealed, so that the air leakage in the vacuum cover 61 during the subsequent negative pressure suction of the coating is avoided, negative pressure is not formed, and the coating of the carrier 1 by the vacuum material-pumping mechanism 6 is affected. Then, the negative pressure plate 62 moves upward under the driving of the driving unit, and as the negative pressure plate 62 slides on the sealing section 611 at the lower part of the vacuum cover 61 and the connection part of the vacuum cover 61 and the carrier 1 is sealed, as the negative pressure plate 62 moves upward, the negative pressure is generated at the upper end part of the negative pressure plate 62 and the carrier 1, the external air pressure presses the paint in the paint supply mechanism 4 at the bottom of the carrier 1 due to the pressure difference, and the paint in the paint supply mechanism 4 is pressed upward into the carrier 1 to be coated, so that a coating is formed. After the coating is completed, the driving unit returns to the negative pressure plate 62 to return to the low position, the negative pressure disappears, and the liquid pressed by the air pressure difference falls down again into the paint supply mechanism 4 due to its own weight. Finally, the driving cylinder 53 drives the vacuum ring to be separated from the carrier 1, and the fixing mechanism 5 is unlocked, so that the effect of the vacuum cover 61 and the fixing mechanism 5 on the carrier 1 on the second weighing of the carrier 1 is avoided. At this time, the weighing assembly 3 performs a second weighing record data on the coated carrier 1 and compares the second weighing record data with the first weighing record data, and the negative pressure of the vacuum pumping mechanism 6 during pumping is adjusted according to the weight difference value of the carrier 1 before and after coating. According to the invention, the honeycomb carrier 1 can be automatically weighed before and after being coated, whether the coating is uniformly and completely coated or not is judged according to the weight of the carrier 1 before and after the coating, and the coating amount of the coating is regulated according to the weight difference value of the carrier 1 before and after the coating, so that the influence of the too small coating amount of the coating on the tail gas treatment efficiency of the catalyst is avoided; and the waste of the coating caused by the overlarge coating amount is avoided, the cost is increased, even the honeycomb-shaped channels on the carrier 1 are blocked, and the tail gas treatment efficiency of the catalyst is affected.
As a further scheme of the invention, the fixing mechanism 5 comprises a fixing ring 51 vertically and slidably arranged on the workbench 2, and an air inflation assembly for clamping the carrier 1 is arranged in the fixing ring 51 and is used for inflating and clamping the carrier 1 in the process of coating the coating; the upper end of the fixed ring 51 is fixedly connected with the lower end of the vacuum cover 61 in a sealing way; after driving the fixing ring 51 to move to the outer periphery of the carrier 1 by the driving cylinder 53, the expansion assembly 52 inflates and clamps the carrier 1, and the expansion assembly 52 expands to form a seal between the inner side of the fixing ring 51 and the outer periphery of the carrier 1 after inflation.
As shown in fig. 3 and 4, the fixing mechanism 5 is provided as a fixing ring 51, the fixing ring 51 moves to the outer side of the carrier 1 and covers the carrier 1 during operation, and then the expansion assembly 52 positioned on the inner wall of the fixing ring 51 starts to be inflated for fixing. In the actual material pumping process, the lower end of the vacuum cover 61 of the invention needs to be sealed and separated from the upper end of the carrier 1, and the tightness is difficult to ensure in a common connection mode, so the upper end of the fixed ring 51 is fixedly connected with the lower end of the vacuum cover 61 in a sealing way, then the carrier 1 is sleeved in the fixed ring 51, after the expansion assembly 52 is inflated, the lower end of the vacuum cover 61 and the upper end of the carrier 1 are also sealed after the expansion assembly 52 is inflated between the inner side of the fixed ring 51 and the periphery of the carrier 1 to form a seal, and thus no air leakage is caused when the vacuum material pumping mechanism 6 pumps materials, and the stability of negative pressure is ensured. The invention adopts the expansion assembly 52 for clamping because the clamping is simple on one hand, the space between the inner side of the fixed ring 51 and the periphery of the carrier 1 is convenient to seal, and on the other hand, the clamping is applicable to carriers 1 with different sizes, and the application is wide. In addition, the fixing ring 51 is fixedly and hermetically connected with the vacuum cover 61, so that the fixing ring 51 and the carrier 1 can be simultaneously driven to be separated when the vacuum cover 61 is reset, and the influence of the fixing ring 51 and the vacuum cover 61 on the carrier 1 on the secondary weighing of the carrier 1 is avoided.
As a further aspect of the present invention, the driving unit includes a driving gear 64 externally connected to a driving source; the outer peripheral wall of the fixed rod 63 is provided with a threaded section 65, the outer periphery of the fixed rod 63 is sleeved with a threaded sleeve 66, the threaded sleeve 66 is in threaded connection with the threaded section 65, and the threaded sleeve 66 is rotatably arranged on the inner top surface of the vacuum cover 61; the drive gear 64 is fixedly mounted to the outer periphery of the threaded sleeve 66.
The invention provides an embodiment of a driving unit, as shown in fig. 3, when the invention works, an external power supply drives a driving gear 64 to rotate, the driving gear 64 drives a threaded sleeve 66 to rotate, the threaded sleeve 66 is in threaded connection with a threaded section 65 on a fixed rod 63, so that the threaded sleeve 66 drives the fixed rod 63 to move upwards, and a negative pressure plate 62 fixedly connected with the fixed rod 63 also vertically slides upwards in a vacuum cover 61. This driving method can apply a large force to the negative pressure plate 62, ensuring that the negative pressure plate 62 is not reset due to the pressure difference.
As a further scheme of the invention, the driving unit comprises an external driving source and a driving gear 64 rotatably installed on the inner top surface of the vacuum cover 61, a supporting rod 67 is further arranged between the driving gear 64 and the negative pressure plate 62, one end ball of the supporting rod 67 is hinged to the lower tooth surface of the driving gear 64, and the other end ball is hinged to the upper end surface of the negative pressure plate 62.
The invention also provides another embodiment of the driving unit, as shown in fig. 3, when the invention works, the external power supply drives the driving gear 64 to rotate, the driving gear 64 rotates to drive the supporting rod 67 to rotate, the inclination angle of the supporting rod 67 is increased, so that the supporting rod 67 can pull the negative pressure plate 62 to rise. The driving mode ensures that the stress of the negative pressure plate 62 is uniform, and the supporting rods 67 are circumferentially arranged on the negative pressure plate 62 at intervals around the fixed rods 63, so that the negative pressure plate 62 can move stably and upwards.
As a further aspect of the present invention, there is also provided a stirring mechanism 7 for stirring the paint in the paint supply mechanism 4 before coating; the stirring mechanism 7 comprises an annular gear 71, a planetary gear 73 and a driving gear 72 externally connected with a power supply; the inner gear ring 71 is fixedly connected with the driving cylinder 53, the vacuum cover 61 is fixedly arranged on the inner gear ring 71, and the fixed ring 51 is connected with the driving cylinder 53 through the vacuum cover 61 and the inner gear ring 71; a driving gear 72 is coaxially and rotatably arranged in the middle of the inner gear ring 71, planetary gears 73 are arranged on the periphery of the driving gear 72 at intervals, the planetary gears 73 are meshed with the driving gear 72 and the inner gear ring 71, stirring rods 74 are coaxially arranged on the planetary gears 73, one ends of the stirring rods 74 are connected with the planetary gears 73 in a key manner, and the other ends of the stirring rods 74 are inserted into the paint supply mechanism 4 to stir paint; the fixed ring 51 is vertically slidably mounted on the stirring rod 74.
In order to ensure that the paint in the paint supply mechanism 4 does not deteriorate in fluidity due to standing for a long period of time, the present invention is provided with a stirring mechanism 7. As shown in fig. 4, before the driving cylinder 53 drives the vacuum housing 61 and the fixing ring 51 to move downward, the driving gear 72 starts to rotate under the driving of the external power source, at this time, since the ring gear 71 is fixed to the driving cylinder 53, the ring gear 71 does not rotate, the planetary gear 73 revolves while rotating, the planetary gear 73 drives the stirring rod 74 to revolve around the carrier 1 while rotating, and the paint in the paint supply mechanism 4 is stirred, so that the fluidity of the paint is prevented from being lowered. After stirring, the driving gear 72 stops moving, the driving cylinder 53 drives the vacuum cover 61 and the fixed ring 51 to move downwards, and at the moment, the stirring rod 74 is limited to move by the vacuum cover 61, so that the influence on the material pumping of the subsequent vacuum material pumping mechanism 6 caused by fluctuation of the paint in the paint supply mechanism 4 due to stirring is avoided.
As a further scheme of the invention, the vacuum coating machine also comprises a control mechanism 8 for adjusting the magnitude of negative pressure when the vacuum pumping mechanism 6 is used for coating by changing the moving amount of the negative pressure plate 62; the driving gear 64 is connected with an external driving source through a control mechanism 8, the control mechanism 8 comprises a metering gear 81 meshed with the driving gear 64, the metering gear 81 is an incomplete gear, the control mechanism 8 receives signals transmitted by the weighing assembly 3, and the metering gear 81 is driven to rotate in the forward and reverse directions according to the deviation degree of the weight difference value of the front carrier 1 and the rear carrier 1 which are weighed twice and a preset standard value.
According to the invention, the metering gear 81 is driven to rotate in the forward direction and the reverse direction according to the deviation degree of the weight difference value of the front carrier 1 and the rear carrier 1 which are weighed twice and a preset standard value, so that the initial position of the negative pressure plate 62 is adjusted, and the negative pressure of the vacuum material pumping mechanism 6 during paint pumping is controlled. The metering gear 81 is arranged as an incomplete gear in order to avoid accidental errors, and the position of the negative pressure plate 62 is adjusted only by the fact that the same type of coating is incomplete for a plurality of times. When the weight difference is smaller than the preset standard value under the condition that the moving distance of the negative pressure plate 62 is certain, the coating is incomplete, the initial position of the negative pressure plate 62 needs to be adjusted downwards, and the negative pressure of the vacuum material pumping mechanism 6 during paint pumping is increased; when the weight difference is larger than the preset standard value, the coating is excessive, the initial position of the negative pressure plate 62 needs to be adjusted upwards, and the negative pressure of the vacuum pumping mechanism 6 during the paint pumping is reduced. Compared with the method for controlling the negative pressure of the vacuum pumping mechanism 6 during the pumping of the paint by adjusting the moving distance of the negative pressure plate 62, the moving distance of the negative pressure plate 62 is fixed, and the phenomenon that the negative pressure plate 62 is repeatedly adjusted and displaced to cause error superposition is avoided. In addition, the invention can adjust the initial position of the negative pressure plate 62 to widen the negative pressure adjusting range and increase the applicability.
Claims (4)
1. Be applied to automatic on-line weighing system of honeycomb coating of automobile exhaust system, its characterized in that: the coating machine comprises a workbench (2) for bearing a honeycomb carrier (1), wherein a weighing assembly (3) for weighing the carrier (1) before and after coating is arranged in the center of the workbench (2), a coating supply mechanism (4) is arranged under the workbench (2), a fixing mechanism (5) for fixing the carrier (1) and a vacuum material pumping mechanism (6) for pumping coating are arranged above the workbench (2), and the coating is pumped into the carrier (1) fixed by the fixing mechanism (5) from the coating supply mechanism (4) under negative pressure by the vacuum material pumping mechanism (6) to finish coating; the weighing assembly (3) adjusts the negative pressure of the vacuum pumping mechanism (6) during pumping according to the weight difference value of the carriers (1) before and after coating;
the vacuum material pumping mechanism (6) comprises a vacuum cover (61) arranged right above the fixing mechanism (5), the vacuum cover (61) is connected with a driving cylinder (53) fixed on the frame, and the driving cylinder (53) drives the vacuum cover to move vertically; a negative pressure plate (62) is vertically and slidably arranged on the inner wall of the vacuum cover (61), the lower part of the vacuum cover (61) is a sealing section, and the negative pressure plate (62) vertically slides in the sealing section; a fixed rod (63) is fixedly arranged on the negative pressure plate (62), a driving unit is arranged on the fixed rod (63), and the driving unit drives the negative pressure plate (62) to vertically move through the fixed rod (63) to form negative pressure absorbing paint;
the fixing mechanism (5) comprises a fixing ring (51) vertically and slidably arranged on the workbench (2), and an air inflation component used for clamping the carrier (1) is arranged in the fixing ring (51) and used for inflating and clamping the carrier (1) in the process of coating the coating; the upper end of the fixed ring (51) is fixedly connected with the lower end of the vacuum cover (61) in a sealing way; after the driving cylinder (53) drives the fixed ring (51) to move to the periphery of the carrier (1), the expansion assembly (52) inflates and clamps the carrier (1); the expansion assembly (52) expands between the inner side of the fixed ring (51) and the periphery of the carrier (1) to form a seal after being inflated;
further comprising stirring means (7) for stirring the paint in the paint supply means (4) prior to application;
the stirring mechanism (7) comprises an annular gear (71), a planetary gear (73) and a driving gear (72) externally connected with a power supply; the inner gear ring (71) is fixedly connected with the driving cylinder (53), the vacuum cover (61) is fixedly arranged on the inner gear ring (71), and the fixed ring (51) is connected with the driving cylinder (53) through the vacuum cover (61) and the inner gear ring (71); a driving gear (72) is coaxially and rotatably arranged in the middle of the inner gear ring (71), planetary gears (73) are arranged on the periphery of the driving gear (72) at intervals, the planetary gears (73) are meshed with the driving gear (72) and the inner gear ring (71), stirring rods (74) are coaxially arranged on the planetary gears (73), one ends of the stirring rods (74) are connected with the planetary gears (73) in a key manner, and the other ends of the stirring rods are inserted into a paint supply mechanism (4) to stir paint; the fixed ring (51) is vertically and slidably arranged on the stirring rod (74).
2. The automatic on-line weighing system for a honeycomb coating applied to an automobile exhaust system according to claim 1, wherein: the driving unit comprises a driving gear (64) externally connected with a driving source; the outer peripheral wall of the fixed rod (63) is provided with a threaded section (65), the outer periphery of the fixed rod (63) is sleeved with a threaded sleeve (66), the threaded sleeve (66) is in threaded connection with the threaded section (65), and the threaded sleeve (66) is rotatably arranged on the inner top surface of the vacuum cover (61); the driving gear (64) is fixedly arranged on the periphery of the screw sleeve (66).
3. The automatic on-line weighing system for a honeycomb coating applied to an automobile exhaust system according to claim 1, wherein: the driving unit comprises an external driving source and a driving gear (64) rotatably mounted on the inner top surface of the vacuum cover (61), a supporting rod (67) is further arranged between the driving gear (64) and the negative pressure plate (62), one end ball head of the supporting rod (67) is hinged to the lower tooth surface of the driving gear (64), and the other end ball head is hinged to the upper end surface of the negative pressure plate (62).
4. A cellular coating automatic on-line weighing system for an automobile exhaust gas exhaust system according to claim 2 or 3, characterized in that: the coating machine also comprises a control mechanism (8) for adjusting the negative pressure of the vacuum material pumping mechanism (6) during coating by changing the moving amount of the negative pressure plate (62); the driving gear (64) is connected with an external driving source through the control mechanism (8), the control mechanism (8) comprises a metering gear (81) meshed with the driving gear (64), the metering gear (81) is an incomplete gear, the control mechanism (8) receives signals transmitted by the weighing assembly (3), and the metering gear (81) is driven to rotate positively and reversely according to the deviation degree of the weight difference value of the front carrier (1) and the rear carrier (1) which are weighed twice and a preset standard value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN113820245A (en) | 2021-12-21 |
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