Sand detection method and device for material level of inorganic sand shooting cylinder

Abstract

The invention discloses a sand detection method and device for the material level of an inorganic sand shooting barrel, and the method comprises the following steps: S1, moving the sand shooting barrel to a sand adding station, and keeping an opening at the upper end of the sand shooting barrel in an open state; s2, after sand adding is completed, an opening in the upper end of the sand shooting barrel is closed, and water mist is introduced into the sand shooting barrel; s3, the sand shooting cylinder is moved to a sand shooting station, and then moved to a sand adding station after sand shooting is completed; s4, an opening in the upper end of the sand shooting cylinder is closed, and water mist in the sand shooting cylinder is pumped out; and S5, an opening in the upper end of the sand shooting barrel is opened, the sand material level in the sand shooting barrel is detected through a material level distance measuring part above the sand shooting barrel, and if the sand material level is lower than a set value, sand is added into the sand shooting barrel. According to the sand detection method and device provided by the invention, the sand detection precision can be improved, the production efficiency is improved, and the influence of water mist on electrical elements is avoided.

Description

Technical Field

[0001] The present invention relates to the field of casting technology, in particular to a sand detection method and device for detecting the material level of an inorganic sand shooting tube. Background Art

[0002] like Figure 1 As shown, the existing inorganic core making equipment includes a sand adding mechanism 1 located at the sand adding station, a pressing mechanism 3 and a sand shooting mechanism 4 located at the sand shooting station, and a sand shooting cylinder 2. The sand shooting cylinder 2 switches between the sand adding station and the sand shooting station. First, the sand shooting cylinder 2 is moved to the sand adding station for sand adding, and the sand shooting cylinder 2 is filled with mist through the mist filling device 6, and then moved to the sand shooting station to shoot sand on the core box 5.

[0003] Inorganic casting processes primarily rely on the dehydration and curing of inorganic binders to solidify sand cores. Therefore, the core sand must maintain proper humidity and temperature to prevent dehydration and crusting that can affect the core-making process.

[0004] The existing solutions are: First, a cover plate is installed on the top of the sand feeding mechanism, and cooling water is passed through the interlayer of the sand feeding mechanism to prevent the core sand from prematurely crusting due to low ambient temperature. Second, cooling water is also arranged on the side wall of the sand shooting cylinder to maintain the sand temperature. When the sand shooting cylinder is in the sand feeding station, a misting device continuously supplies water mist to maintain the core sand humidity, ensuring that the core sand does not prematurely crust and solidify during the core making process.

[0005] The above solution has the following defects:

[0006] 1. When the top of the sand shooting tube is filled with water mist, the laser ranging switch cannot penetrate the water mist. When there is no core sand in the sand shooting tube, the detection switch cannot identify the sand level height, which will lead to misidentification of the core sand level in the sand shooting tube, thus affecting core making.

[0007] Second, the water mist is slow to disperse actively, and it takes a long time to ensure the normal laser material level detection, which affects the core making rhythm and reduces production efficiency. Summary of the Invention

[0008] In view of the above problems, the present invention aims to provide a sand detection method and device for the material level of an inorganic sand shooting tube, which can improve the mist filling quality and sand detection accuracy.

[0009] In order to overcome the deficiencies of the prior art, one of the technical solutions provided by the present invention is:

[0010] A sand detection method for an inorganic sand-shooting tube material level comprises the following steps:

[0011] Step s1, move the sand-shooting cylinder to the sand-adding station, and keep the upper opening of the sand-shooting cylinder open;

[0012] Step S2: After the sand is added, the upper opening of the sand shooting cylinder is closed and water mist is introduced into the sand shooting cylinder;

[0013] Step S3, move the sand shooting cylinder to the sand shooting station, and then move it to the sand adding station after the sand shooting is completed;

[0014] Step S4, closing the upper opening of the sand-shooting tube and pumping out the water mist in the sand-shooting tube;

[0015] Step S5: Open the upper end opening of the sand shooting cylinder, and detect the sand level in the sand shooting cylinder through the material level distance measuring component above the sand shooting cylinder. If the sand level is lower than the set value, add sand into the sand shooting cylinder.

[0016] In order to overcome the deficiencies of the prior art, the second technical solution provided by the present invention is:

[0017] A sand detection device for detecting the material level of an inorganic sand-shooting tube is installed at the bottom of a sand-feeding mechanism and comprises:

[0018] a bracket having an opening communicating with the sand-shooting cylinder;

[0019] a gate mechanism mounted on the bracket for opening or closing the opening, the gate mechanism comprising two cover plates movably arranged on both sides of the opening and a drive assembly for driving the two cover plates to move relative to or away from each other;

[0020] An air path switching mechanism, which is mounted on the bracket and includes a three-way valve, an air intake pipe connected to a first port of the three-way valve, a connecting pipe connecting a second port of the three-way valve and one of the cover plates, an air extraction pipe connected to a third port of the three-way valve, and an air extraction component provided on the air extraction pipe;

[0021] The material level distance measuring component is arranged at the bottom of the sand adding mechanism and is used to monitor the material level in the sand shooting cylinder. The material level distance measuring component, the sand adding mechanism and the control unit are connected by signal.

[0022] In one embodiment, a proximity switch is further included, which is installed on the bracket and is used to monitor whether the sand shooting tube moves below the sand adding mechanism. The proximity switch, the drive assembly, and the three-way valve are respectively connected to the control unit signal.

[0023] In one embodiment, the bracket includes a rectangular hollow frame and a plurality of connecting frames arranged in a circumferential direction of the rectangular hollow frame, and the rectangular hollow frame is located on both sides of the cover plate in the moving direction as a guide rail portion.

[0024] In one embodiment, roller assemblies are provided on both sides of the cover plate in the moving direction to roll with the guide rail portion;

[0025] The roller assembly includes at least two rollers staggeredly arranged along the width direction of the guide rail portion, and the rollers are connected to the connecting blocks on both sides of the cover plate via connecting shafts.

[0026] In one embodiment, a limiting groove cooperating with the roller is provided at a position of the guide rail portion corresponding to the closed position of the cover.

[0027] In one embodiment, a plurality of guide blocks cooperating with the cover plate are provided on the inner side of the guide rail portion.

[0028] In one embodiment, the driving assembly is two driving components connected to the two cover plates, a connecting seat is provided at the upper end of the cover plate, the driving component is mounted on the bracket, and a power output end is rotatably connected to the connecting seat via a connecting assembly;

[0029] The connecting assembly includes a first connecting member fixedly connected to the power output end of the driving component and a second connecting member rotatably connected to the first connecting member, and the second connecting member is rotatably connected to the connecting seat.

[0030] In one embodiment, a sealing plate or a sealing ring is provided on the end surface of the cover plate that contacts the sand-shooting tube.

[0031] In one embodiment, the air extraction component is a vacuum generator.

[0032] Compared with the prior art, the advantages of the present invention are:

[0033] 1. Before the material level measuring component monitors the sand quantity, the water mist inside the sand shooting tube is extracted to improve the measurement effectiveness of the material level measuring component and the timeliness of the core making cycle, thereby improving production efficiency;

[0034] 2. Adding a cover can ensure the quality of the mist filling, protect the core sand in the sand shooting tube, and prevent the water mist from escaping during the mist filling process and affecting the electrical components;

[0035] 3. The device can be adapted to inorganic core machines of different specifications. By adding a vacuum generator, the measurement effectiveness of the material level and distance measuring components can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 any creative work.

[0037] Figure 1 It is a structural diagram of an inorganic core device in the prior art;

[0038] Figure 2 This is a structural schematic diagram of a sand detection group device for an inorganic sand-shooting tube material level according to the present invention in use;

[0039] Figure 3 Schematic diagram of part of the structure of the sand detection device (excluding the material level ranging component) in an embodiment of the present invention;

[0040] Figure 4 for Figure 3 A partial enlarged view of point I in the middle;

[0041] Figure 5 This is a structural diagram of the cover in the open state according to an embodiment of the present invention;

[0042] Figure 6 Schematic diagram of the installation structure of the cover plate and the roller assembly in an embodiment of the present invention;

[0043] Figure 7 Schematic diagram of the structure of the sealing plate in an embodiment of the present invention;

[0044] in:

[0045] 1. Sand adding mechanism; 2. Sand shooting tube; 3. Pressing mechanism; 4. Sand shooting mechanism; 5. Core box; 6. Mist filling device;

[0046] 100. Sand detection device; 101. Hollow frame; 101a. Guide rail; 101a1. Position limiting groove; 102. Cover plate; 102a. Connecting block; 103. Driving component; 104. Air inlet pipe; 105. Three-way valve; 106. Connecting pipe; 107. Air extraction pipe; 108. Air extraction component; 109. Connecting frame; 110. Guide block; 111. Roller; 112. Connecting shaft; 113. Sealing plate; 114. Material level ranging component; 115. Connecting seat; 116. First connecting member; 117. Second connecting member.

[0047] 200, sand shooting tube;

[0048] 300, sand adding mechanism;

[0049] 400, downward pressure mechanism;

[0050] 500, sand shooting mechanism;

[0051] 600, core box;

[0052] 700. Mist filling equipment. DETAILED DESCRIPTION

[0053] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the present invention and are not intended to limit the scope of the present invention. The implementation conditions adopted in the examples can be further adjusted according to the conditions of the specific manufacturer. The implementation conditions not specified are generally those in routine experiments.

[0054] See also Figure 2 and Figure 3 , which is a schematic structural diagram of an embodiment of the present invention, provides a sand level detection device 100 for an inorganic sand-shooting tube. The device is mounted at the bottom of a sand-feeding mechanism 300 and includes a bracket, a shutter mechanism and an air path switching mechanism mounted on the bracket, and a material level ranging component 114 disposed at the bottom of the sand-feeding mechanism 300. The shutter mechanism is used to open or close the sand-shooting tube 200, and the air path switching mechanism is used to switch the air path to allow water mist to be introduced into or removed from the sand-shooting tube 200. The material level ranging component 114 and the sand-feeding mechanism 300 are connected to a control unit via a signal connection. The material level ranging component 114 monitors the material level in the sand-shooting tube 200, and sand is added to the sand-shooting tube 200 in a timely manner. Preferably, the material level ranging component 114 can be a laser ranging sensor.

[0055] The bracket has an opening connected to the sand-shooting tube 200. Specifically, the bracket includes a rectangular hollow frame 101 and a plurality of connecting frames 109 arranged circumferentially on the rectangular hollow frame 101. The bracket is fixedly mounted on a frame (not shown) supporting the sand-adding mechanism 300 through the connecting frames 109.

[0056] The gate mechanism includes two cover plates 102 movably arranged on both sides of the opening and a driving assembly that drives the two cover plates 102 to move relative to or away from each other. Roller assemblies are respectively provided on both sides of the cover plates 102 to roll with the rectangular hollow frame 101. Correspondingly, the rectangular hollow frame 101 is located on both sides of the moving direction of the cover plates 102 as guide rail parts 101a.

[0057] like Figure 6 As shown, the roller assembly includes two rollers 111 staggered along the width of the guide rail portion 101a. Each roller 111 is connected to the connecting blocks 102a on both sides of the cover plate 102 via a connecting shaft 112. The staggered arrangement of the rollers 111 improves the stability of the rolling fit between the cover plate 102 and the guide rail portion 101a. It should be understood that a larger number of rollers can be provided as needed, and the present invention is not limited thereto.

[0058] To further optimize the implementation effect of the present invention, a limiting groove 101a1 is provided at a position corresponding to the closed position of the guide rail portion 101a and the cover plate 102. When the two cover plates 102 move relative to each other to close the switch, the roller 111 moves into the limiting groove 101a1, reducing the gap between the cover plate 102 and the sand-shooting barrel 200 and improving the sealing between the cover plate 102 and the sand-shooting barrel 200. A guiding inclined surface is provided in the limiting groove 101a1 to cooperate with the roller 111, so that the roller 111 can roll into the limiting groove 101a1.

[0059] In order to improve the stability of the movement of the cover plate 102, as Figure 5 As shown, a plurality of guide blocks 110 cooperating with the cover plate 102 are provided on the inner side of the guide rail portion 101 a , and the lower end surface of the cover plate 102 can abut against the plurality of guide blocks 110 to ensure smooth movement.

[0060] The drive assembly comprises two drive components 103 connected to the two cover plates 102. A connecting base 115 is provided on the cover plates 102. The drive components 103 are mounted on a bracket, and the power output end is rotatably connected to the connecting base 115 via the connecting assembly. Specifically, the drive components 103 can be pneumatic cylinders, with the cylinder's driving direction extending horizontally. The cylinders are mounted on the outer ends of the hollow rectangular frame 101, and a slot is provided in the hollow rectangular frame 101 for the cylinder shaft to pass through.

[0061] like Figure 4 As shown, the connecting assembly includes a first connecting member 116 fixedly connected to the power output end of the driving component 103 and a second connecting member 117 rotatably connected to the first connecting member 116, the second connecting member 117 is rotatably connected to the connecting seat 115, the first connecting member 116 and the second connecting member 117 are both Y-shaped, and the first connecting member 116 and the second connecting member 117, as well as the second connecting member 117 and the connecting seat 115 can be rotatably connected via a pin shaft. Through the extension and retraction of the cylinder shaft, the two cover plates 102 can be driven to move relative to or away from each other to close or open the opening on the bracket.

[0062] In order to improve the sealing performance of the structure, a sealing plate 113 or a sealing ring is provided on the end surface where the cover plate 102 contacts the sand-shooting tube 200. Figure 7 As shown, the sealing plate 113 can be fixed to the lower end of the cover plate 102 by a plurality of screws, and the sealing ring is embedded in the limiting groove at the lower end of the cover plate 102 (not shown).

[0063] The air path switching structure includes a three-way valve 105, an air inlet line 104 connected to the first port of the three-way valve 105, a connecting line 106 connected to the second port of the three-way valve 105 and one of the cover plates 102, an air extraction line 107 connected to the third port of the three-way valve 105, and an air extraction component 108 disposed on the air extraction line 107. The three-way valve 105 is a pneumatically controlled three-way valve, and the air extraction component 108 can be a vacuum generator or an air extraction pump. In this example, an APC750s vacuum generator is used. The three-way valve 105 enables switching between the water mist inlet line 104 and the air extraction line 107, facilitating the filling and extraction of water mist into the sand-shooting tube 200.

[0064] In order to further optimize the implementation effect of the present invention, a proximity switch (not shown) installed on the bracket is also included to monitor whether the sand-shooting cylinder 200 moves to the bottom of the sand-adding mechanism 300. The proximity switch, the drive assembly, and the three-way valve 105 are respectively connected to the control unit signal. When the proximity switch detects that the sand-shooting cylinder 200 moves to the bottom of the sand-adding mechanism 300, the control unit controls the drive assembly to open or close the sand-shooting cylinder 200 to facilitate the operation of adding sand or extracting water mist.

[0065] The present invention also relates to a sand detection method for an inorganic sand shooting tube material level, comprising the following steps:

[0066] Step S1: Move the sand-shooting cylinder 200 to the sand-adding station, and drive the two cover plates 102 to move in opposite directions, so that the upper opening of the sand-shooting cylinder 200 remains open;

[0067] Step S2: After the sand is added, the driving assembly drives the two cover plates 102 to move toward each other, closes the upper opening of the sand shooting cylinder 200, opens the air inlet pipe 104, and introduces water mist into the sand shooting cylinder 200;

[0068] Step S3: Move the sand-shooting tube 200 to the sand-shooting station, press down the pressing mechanism 400 to seal the upper end of the sand-shooting tube 200, and move the sand-shooting tube 200 to the sand-adding station after the sand-shooting mechanism 500 completes the sand-shooting.

[0069] Step S4: close the upper opening of the sand-shooting tube 200, open the exhaust pipe 107 and the exhaust component 108, and extract the water mist in the sand-shooting tube 200;

[0070] Step S5: Open the upper end opening of the sand shooting tube 200, and detect the sand level in the sand shooting tube 200 through the material level ranging component 114 above the sand shooting tube 200. If the sand level is lower than the set value (for example, lower than 70% of the volume of the sand shooting tube), add sand into the sand shooting tube 200.

[0071] The aforementioned sand adding mechanism 300 , pressing mechanism 400 , and sand shooting mechanism 500 are all mechanisms on conventional inorganic core making equipment, and are not described in detail in the present invention.

[0072] The working principle of the present invention is:

[0073] like Figure 1 As shown, the sand-shooting cylinder 200 is moved to the bottom of the sand-adding mechanism 300. When the proximity switch detects the position of the sand-shooting cylinder 200, the driving assembly drives the two cover plates 102 to move in opposite directions, opens the upper opening of the sand-shooting cylinder 200, and adds sand into the sand-shooting cylinder 200 through the sand-adding mechanism 300. After the sand-adding is completed, the driving assembly drives the two cover plates 102 to move in opposite directions to close the upper opening of the sand-shooting cylinder 200, and introduces water mist into the sand-shooting cylinder 200 through the mist-filling device 700 (a mechanism on a conventional non-mechanical core device). Move the sand-shooting cylinder 200 to the position where the sand-shooting cylinder 200 is located. At the sand adding station, the pressing mechanism 400 presses down to seal the upper opening of the sand shooting cylinder 200. After the sand shooting is completed, the sand shooting cylinder 200 is moved to the sand adding station; the driving assembly drives the two cover plates 102 to close the upper opening of the sand shooting cylinder 200, opens the exhaust pipe 107 and the exhaust component 108, and extracts the water mist in the sand shooting cylinder 200; finally, the driving assembly opens the upper opening of the sand shooting cylinder 200, and the material level measuring component 114 at the bottom of the sand adding mechanism 300 monitors the material level in the sand shooting cylinder 200. If it is lower than the set value, sand is added to the sand shooting cylinder 200.

[0074] In summary, by setting up the gate mechanism and the air path switching mechanism, the quality of the mist filling can be improved, the water mist can be easily extracted, the effectiveness of the material level ranging component measurement can be improved, and the production efficiency can be improved.

[0075] The above examples are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A sand detection method for an inorganic sand-shooting tube material level, characterized in that: The following steps are involved: Step S1, move the sand-shooting cylinder to the sand-adding station, and keep the upper end opening of the sand-shooting cylinder open; Step S2: After the sand is added, the upper opening of the sand shooting cylinder is closed and water mist is introduced into the sand shooting cylinder; Step S3, move the sand shooting cylinder to the sand shooting station, and then move it to the sand adding station after the sand shooting is completed; Step S4, closing the upper opening of the sand-shooting tube and pumping out the water mist in the sand-shooting tube; Step S5: Open the upper end opening of the sand shooting cylinder, and detect the sand level in the sand shooting cylinder through the material level distance measuring component above the sand shooting cylinder. If the sand level is lower than the set value, add sand into the sand shooting cylinder.

2. A sand detection device for an inorganic sand-shooting tube, installed at the bottom of a sand-feeding mechanism, characterized in that: include: a bracket having an opening communicating with the sand-shooting cylinder; a gate mechanism mounted on the bracket for opening or closing the opening, the gate mechanism comprising two cover plates movably arranged on both sides of the opening and a drive assembly for driving the two cover plates to move relative to or away from each other; An air path switching mechanism, which is mounted on the bracket and includes a three-way valve, an air intake pipe connected to a first port of the three-way valve, a connecting pipe connecting a second port of the three-way valve and one of the cover plates, an air extraction pipe connected to a third port of the three-way valve, and an air extraction component provided on the air extraction pipe; The material level distance measuring component is arranged at the bottom of the sand adding mechanism and is used to monitor the material level in the sand shooting cylinder. The material level distance measuring component, the sand adding mechanism and the control unit are connected by signal.

3. The sand detection device according to claim 2, characterized in that: It also includes a proximity switch installed on the bracket for monitoring whether the sand-shooting tube moves below the sand-feeding mechanism. The proximity switch, the drive assembly, and the three-way valve are respectively connected to the control unit for signal connection.

4. The sand detection device according to claim 2, characterized in that: The bracket includes a rectangular hollow frame and a plurality of connecting frames arranged on the circumference of the rectangular hollow frame. The rectangular hollow frame is located on both sides of the cover plate in the moving direction as guide rail parts.

5. The sand detection device according to claim 4, characterized in that: Roller assemblies are respectively provided on both sides of the cover plate in the moving direction to roll with the guide rail portion; The roller assembly includes at least two rollers staggeredly arranged along the width direction of the guide rail portion, and the rollers are connected to the connecting blocks on both sides of the cover plate via connecting shafts.

6. The sand detection device according to claim 5, characterized in that: A position of the guide rail portion corresponding to the closed position of the cover plate is provided with a limiting groove that cooperates with the roller.

7. The sand detection device according to claim 6, characterized in that: A plurality of guide blocks cooperating with the cover plate are provided on the inner side of the guide rail portion.

8. The sand detection device according to claim 2, characterized in that: The driving assembly is composed of two driving components connected to the two cover plates. A connecting seat is provided on the upper end of the cover plate. The driving components are mounted on the bracket and the power output end is rotatably connected to the connecting seat via the connecting assembly. The connecting assembly includes a first connecting member fixedly connected to the power output end of the driving component and a second connecting member rotatably connected to the first connecting member, and the second connecting member is rotatably connected to the connecting seat.

9. The sand detection device according to claim 2, characterized in that: The end surface of the cover plate in contact with the sand-shooting tube is provided with a sealing plate or a sealing ring.

10. The sand detection device according to claim 2, characterized in that: The air extraction component is a vacuum generator.

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