Device for detecting sand amount through pressure feedback
By installing a guide net at the feed hopper to intercept damp, clump-forming sand, the detection error caused by damp, clump-forming sand during mixing is solved, thus achieving accuracy and reliability of pressure feedback detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU HAWK FOUNDRY EQUIP
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-08
AI Technical Summary
When mixing damp, lumpy sand, the pressure feedback difference between damp and dry sand is large, resulting in a large detection error.
Install a guide net at the feed hopper to intercept damp, clump-like sand, and guide loose, dry sand into the sand hopper through the guide net to ensure that the rotating rod can accurately detect the amount of sand.
By using a guide net to intercept damp, clump-like sand, errors in judgment during rotation detection by the rotating rod are avoided, thus improving the detection accuracy and reliability of the pressure sensor.
Smart Images
Figure CN224216699U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field related to the construction industry, specifically relating to a device for detecting the amount of sand through pressure feedback. Background Technology
[0002] The sand is stirred by a rotating rod driven by a hydraulic motor. The resistance during rotation, combined with a pressure sensor, can detect the pressure changes of the sand in real time and provide feedback on the amount of sand in the container.
[0003] However, when the rotating rod is used to stir and test the sand, if it stirs up damp, clumped sand, the difference between the damp, clumped sand and the dry sand will be large, which will lead to a large error in the pressure feedback value. Utility Model Content
[0004] The purpose of this invention is to provide a device for detecting the amount of sand through pressure feedback, in order to solve the problem mentioned in the background art that if wet and clumpy sand is stirred in the process, the difference between the wet and clumpy sand and the dry sand is large, which will lead to a large error in the pressure feedback value.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a device for detecting sand quantity through pressure feedback, comprising a machine body and a sand hopper installed inside the machine body;
[0006] A feed hopper is provided on the upper side of the sand hopper to guide sand into the sand hopper;
[0007] The sand hopper is equipped with an outer sleeve.
[0008] A hydraulic motor is provided at the first end of the outer sleeve, and a connecting flexible shaft is fixedly connected to the lower outer wall of the hydraulic motor. A rotating rod is provided on the other side of the connecting flexible shaft, and a pressure detector is fixedly connected to the rear outer wall of the hydraulic motor to detect the resistance when the rotating rod rotates.
[0009] A guide net is fixedly connected between the inner walls of the left and right ends of the feed hopper to intercept and guide the damp, clump-forming sand.
[0010] Preferably, the guide net is fixedly connected to the outer walls of the left and right ends with legs, and a fixing plate is provided on the lower side of the legs.
[0011] Preferably, a connecting plate is fixedly connected to the lower outer wall of the support leg, and a downward-opening slot is provided inside the lower outer wall of the connecting plate.
[0012] Preferably, the upper outer wall of the fixing plate is fixedly connected with a plurality of springs that are inserted upward into the slots to provide slight wobbling to the guide net, and the upper outer wall of each of the plurality of springs is fixedly connected with a positioning block to limit the position of the guide net.
[0013] Preferably, the lower outer wall of the fixing plate has multiple through openings to allow some sand to pass through, and the circular outer walls of the support legs and the connecting plate are provided with soft pads.
[0014] Preferably, the guide net is conical.
[0015] Preferably, a rotary joint is provided between the connecting flexible shaft and the rotating rod.
[0016] Preferably, a control valve is provided between the inner walls of the left and right ends of the sand hopper to control the entry of sand, and a nozzle is provided on the lower side of the sand hopper.
[0017] Compared with the prior art, this utility model provides a device for detecting sand quantity through pressure feedback, which has the following beneficial effects:
[0018] By installing a guide net, when sand is conveyed into the sand hopper through the feed hopper, impurities and damp, lumpy sand in the sand can be intercepted and guided, ensuring that loose, dry sand enters the sand hopper for storage. This avoids the situation where the rotating rod, when rotating to detect the amount of sand in the sand hopper, stirs up damp sand and makes incorrect judgments. It also allows the pressure sensor to accurately detect the amount of sand based on the preset pressure and sand quantity model, greatly improving the reliability of the detection results. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of a device for detecting sand quantity through pressure feedback according to this utility model.
[0020] Figure 2 This is a partial structural diagram of the outer sleeve area of this utility model.
[0021] Figure 3 This is a partial structural schematic diagram of the front cross-section of the outer sleeve area of this utility model.
[0022] Figure 4 This is a partial structural diagram of the feed hopper area of this utility model.
[0023] Figure 5 This is a partial structural schematic diagram of the front cross-section of the support area of this utility model.
[0024] In the diagram: 1. Feed hopper; 2. Control valve; 3. Machine body; 4. Sand hopper; 5. Shooting head; 6. Rotating rod; 7. Outer sleeve; 8. Pressure detector; 9. Hydraulic motor; 10. Rotary joint; 11. Connecting flexible shaft; 12. Guide net; 13. Support leg; 14. Soft pad; 15. Slot; 16. Positioning block; 17. Spring; 18. Through port; 19. Fixing plate; 20. Connecting plate. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] This utility model provides, for example Figure 1-5 The device shown includes a body 3 and a sand hopper 4 installed inside the body 3 for detecting the amount of sand by pressure feedback.
[0027] A feed hopper 1 is provided on the upper side of the sand hopper 4 to guide sand into the sand hopper 4;
[0028] The sand hopper 4 is equipped with an outer sleeve 7;
[0029] A hydraulic motor 9 is installed at the first end of the outer sleeve 7. A connecting flexible shaft 11 is fixedly connected to the lower outer wall of the hydraulic motor 9. A rotating rod 6 is installed on the other side of the connecting flexible shaft 11. A pressure detector 8 is fixedly connected to the rear outer wall of the hydraulic motor 9 to detect the resistance when the rotating rod 6 rotates. Sand is conveyed to the sand hopper 4 through the feed hopper 1. When the amount of sand in the sand hopper 4 is detected, the hydraulic energy is converted into mechanical energy through the hydraulic system inside the hydraulic motor 9, outputting rotational power. The connecting flexible shaft 11 fixedly connected to the lower outer wall of the hydraulic motor 9 transmits the power. The rotating rod 6, connected to the other side of the flexible shaft 11, rotates under the drive of the hydraulic motor 9. When the rotating rod 6 rotates in the sand hopper 4, it interacts with the sand in the sand hopper 4 and stirs the sand. When the rotating rod 6 rotates in the sand, the sand will generate a certain resistance to the rotating rod 6. This resistance will be transmitted to the hydraulic motor 9 through the flexible shaft 11. The pressure detector 8 senses the change in resistance borne by the hydraulic motor 9 and converts it into a corresponding pressure signal. Based on the strength of the pressure signal, the current amount of sand in the sand hopper 4 is determined.
[0030] A guide net 12 is fixedly connected between the inner walls of the left and right ends of the feed hopper 1 to intercept and guide the damp and clumped sand. When the sand enters from the feed hopper 1, the damp and clumped sand cannot pass through the mesh of the guide net 12 due to its large volume, and is thus directly intercepted above the guide net 12.
[0031] like Figure 4 and Figure 5 As shown, support legs 13 are fixedly connected between the outer walls of the left and right ends of the guide net 12, and the guide net 12 is fixedly connected between the inner walls of the left and right ends of the feed hopper 1 to intercept and guide the wet and clumped sand. A fixing plate 19 is provided on the lower side of the support leg 13, and a connecting plate 20 is fixedly connected to the lower outer wall of the support leg 13. A downward-opening slot 15 is opened inside the lower outer wall of the connecting plate 20. Multiple springs 17 that are inserted upward into the slot 15 are fixedly connected to the upper outer wall of the fixing plate 19 to provide slight shaking to the guide net 12. Positioning blocks 16 are fixedly connected to the upper outer walls of the multiple springs 17 to limit the position of the guide net 12. Multiple vertically penetrating openings 18 are opened inside the lower outer wall of the fixing plate 19 to allow some sand to pass through. Soft pads 14 are provided on the circular outer walls of the support leg 13 and the connecting plate 20.
[0032] When the sand passes through the guide net 12, the sand will collide with the guide net 12 as it flows. The guide net 12, which is impacted, will sway left and right under the restriction of the spring 17, which helps the guide net 12 pass through the sand, making the sand more evenly distributed on the net surface and speeding up its passage through the mesh. The soft pad 14 can effectively buffer the impact force generated by this friction and collision, reduce the wear on the connection parts of the guide net 12, and extend its service life.
[0033] like Figure 4 As shown, the guide net 12 is conical.
[0034] The conical guide net 12 is in the feed hopper 1, with its larger opening end facing down and its smaller opening end facing up. When sand is poured into the feed hopper 1, the wet and clumped sand, due to its larger size, will be intercepted by the surface of the conical guide net 12 and guided to the left and right sides.
[0035] like Figure 3 As shown, a rotary joint 10 is provided between the connecting flexible shaft 11 and the rotating rod 6.
[0036] The hydraulic motor 9 drives the rotating rod 6 to rotate via the connecting flexible shaft 11. During the rotation, the rotary joint 10 allows for a certain angular deviation and relative displacement between the connecting flexible shaft 11 and the rotating rod 6, while maintaining stable power transmission.
[0037] like Figure 1As shown, a control valve 2 is provided between the inner walls of the left and right ends of the sand hopper 4 to control the entry of sand, and a nozzle 5 is provided on the lower side of the sand hopper 4.
[0038] When sand needs to be added to the sand hopper 4, the operator can adjust the opening of the control valve 2 according to the actual needs to accurately control the amount of sand added. The nozzle 5 set on the lower side of the sand hopper 4 is mainly used to discharge the sand in the sand hopper 4 and guide the sand to a specific application location.
[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A device for detecting sand quantity by pressure feedback, comprising a body (3) and a sand hopper (4) installed inside the body (3); A feed hopper (1) is provided on the upper side of the sand hopper (4) to guide sand into the sand hopper (4); The sand hopper (4) is provided with an outer sleeve (7); The outer sleeve (7) is provided with a hydraulic motor (9) at the first end. A connecting flexible shaft (11) is fixedly connected to the lower outer wall of the hydraulic motor (9). A rotating rod (6) is provided on the other side of the connecting flexible shaft (11). A pressure detector (8) is fixedly connected to the rear outer wall of the hydraulic motor (9) to detect the resistance when the rotating rod (6) rotates. Its features are: A guide net (12) is fixedly connected between the inner walls of the left and right ends of the feed hopper (1) to intercept and guide the damp and clump-forming sand.
2. The device for detecting sand quantity via pressure feedback according to claim 1, characterized in that: The guide net (12) is fixedly connected to the outer walls of the left and right ends with support legs (13), and a fixing plate (19) is provided on the lower side of the support legs (13).
3. The device for detecting sand quantity via pressure feedback according to claim 2, characterized in that: A connecting plate (20) is fixedly connected to the lower outer wall of the support leg (13), and a downward-opening slot (15) is provided inside the lower outer wall of the connecting plate (20).
4. The device for detecting sand quantity via pressure feedback according to claim 2, characterized in that: The upper outer wall of the fixing plate (19) is fixedly connected with a plurality of springs (17) that are inserted into the slots (15) to provide slight wobbling to the guide net (12). The upper outer wall of each of the springs (17) is fixedly connected with a positioning block (16) to limit the position of the guide net (12).
5. The device for detecting sand quantity via pressure feedback according to claim 2, characterized in that: The lower outer wall of the fixing plate (19) has multiple through openings (18) to allow some sand to pass through. The circular outer walls of the support (13) and the connecting plate (20) are provided with pads (14).
6. The device for detecting sand quantity via pressure feedback according to claim 1, characterized in that: The guide net (12) is conical.
7. The device for detecting sand quantity via pressure feedback according to claim 1, characterized in that: A rotary joint (10) is provided between the connecting flexible shaft (11) and the rotating rod (6).
8. The device for detecting sand quantity via pressure feedback according to claim 1, characterized in that: A control valve (2) is provided between the inner walls of the left and right ends of the sand hopper (4) to control the entry of sand. A nozzle (5) is provided on the lower side of the sand hopper (4).