Sand wet strength detection device

Abstract

The utility model relates to the technical field of strength detection discloses a moulding sand wet strength detection device, including the isolation box, the inside of isolation box is fixedly installed with the guide cylinder through the support beam, the guide cylinder is set vertically, is installed in the guide cylinder and is used for compacting sand sample's water bucket, the lateral wall of water bucket is provided with the scale band along the vertical direction, the upside of water bucket is fixedly installed with the lifting ring, the inside one side of isolation box is fixedly installed with the water supply tank, the top of isolation box is installed with the measurement subassembly for weighing, the cabinet door of isolation box is fixedly installed with the industrial computer, the bottom of isolation box is fixedly installed with the camera through the support seat, the utility model can accurately control and monitor the pressure that applies on sand sample: can capture the critical point of sand sample from the elastic deformation to the plastic collapse in time, and stop water supply through the solenoid valve, avoid the whole quality error of water bucket, solved the problem of traditional method pressure control precision low, data acquisition lag.

Description

Technical Field

[0001] This utility model relates to the field of strength testing technology, specifically a device for testing the wet strength of molding sand. Background Technology

[0002] In sand casting, some manufacturers demold before the molding sand has hardened to a sufficient strength due to fast production pace and insufficient molds. Therefore, these manufacturers need the molding sand to have a certain wet strength to meet their production needs.

[0003] However, existing conventional molding sand strength testing equipment is mostly designed for hardened dry molding sand, and its measurement lower limit is relatively high, making it difficult to accurately capture the weak strength characteristics of wet molding sand under low stress. Traditional wet strength testing methods usually use water bucket pressurization, gradually applying pressure to the sand sample by injecting water until the collapse critical point, which has problems such as low pressure control accuracy and data acquisition lag.

[0004] Therefore, in order to solve the above problems, a molding sand wet strength testing device is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a molding sand wet strength testing device that has precise pressure control and timely data acquisition, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A molding sand wet strength testing device includes an isolation box. Inside the isolation box, a guide cylinder is fixedly installed via a support beam. The guide cylinder is vertically positioned. A water-holding bucket for compressing the sand sample is installed inside the guide cylinder. A graduated band is provided on the side wall of the water-holding bucket along a vertical direction. A lifting ring is fixedly installed on the upper side of the water-holding bucket. A water supply tank is fixedly installed on one side of the isolation box. A weighing assembly is installed on the top of the isolation box. An industrial computer is fixedly installed on the door of the isolation box. A camera is fixedly installed on the bottom of the isolation box via a support base.

[0007] Specifically, the water supply tank includes a tank body, an electromagnetic flow valve, and a universal bamboo joint pipe. The tank body is fixedly assembled with the isolation box. The lower side of the tank body is connected to one end of the universal bamboo joint pipe through the electromagnetic flow valve. The other end of the universal bamboo joint pipe is located above the water tank.

[0008] Specifically, the metering assembly includes a worm gear reducer motor, a winding reel, and a tension gauge. The worm gear reducer motor is fixedly installed on the upper side of the isolation box. The winding reel is fixedly installed on the output end of the worm gear reducer motor. One end of a steel cable is fixedly installed on the winding reel. The other end of the steel cable extends into the isolation box and is fixedly installed with a tension gauge. An anti-detachment hook is installed on the lower side of the tension gauge. The anti-detachment hook is engaged with the lifting ring during use. A through hole is provided on the top of the isolation box for the steel cable to pass through.

[0009] Specifically, there are four cameras, which are distributed around the sand sample.

[0010] Furthermore, multiple layers of omnidirectional balls are fixedly installed on the inner circumference of the guide tube, with each layer consisting of 3 to 5 omnidirectional balls arranged in a circular pattern, and the spheres of the omnidirectional balls abutting against the water tank.

[0011] Compared with the prior art, the beneficial effects of this utility model are: It can accurately control and monitor the pressure applied to the sand sample: it can capture the critical point of the sand sample from elastic deformation to plastic collapse in time, and stop the water supply through the electromagnetic flow valve to avoid errors in the overall mass of the water tank, thus solving the problems of low pressure control accuracy and data acquisition lag in traditional methods. It also features two pressure data reading methods, allowing for flexible application. Attached Figure Description

[0012] Figure 1 This is a schematic front view of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the water supply tank of this utility model; Figure 3 This is a schematic diagram of the metering component of this utility model; Figure 4 This is a schematic cross-sectional view of the guide tube of this utility model.

[0013] In the diagram: 1. Isolation box, 2. Industrial computer, 3. Camera, 4. Omnidirectional ball, 5. Guide cylinder, 6. Water tank, 7. Water supply tank, 71. Box body, 72. Electromagnetic flow valve, 73. Omnidirectional bamboo joint pipe, 8. Metering component, 81. Worm gear reducer motor, 82. Rewinding wheel, 83. Tension gauge, 84. Anti-detachment hook. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0015] Example content: Please see Figure 1 A device for testing the wet strength of molding sand is provided, including an isolation box 1. The isolation box 1 is an existing component with a cabinet, door and other structures. A guide cylinder 5 is fixedly installed inside the isolation box 1 by a support beam. The guide cylinder 5 is vertically arranged, and a water-filled bucket 6 for pressing the sand sample is installed inside the guide cylinder 5. The water-filled bucket 6 is used to collect water and gradually increase the weight, thereby increasing the pressure applied to the sand sample. The guide cylinder 5 is used to guide the water-filled bucket 6 to move in the vertical direction so that the water-filled bucket 6 will not tilt.

[0016] The side wall of the water tank 6 is provided with a scale strip along the vertical direction. The scale strip that protrudes from the guide tube 5 is used to intuitively display the pressure value. The pressure value is matched with the weight of the water tank 6 after it is filled with water. A lifting ring is fixedly installed on the upper side of the water tank 6. The water tank 6 can be easily removed by holding the lifting ring for cleaning and maintenance, ensuring the accuracy of the next test.

[0017] A water supply tank 7 is fixedly installed on one side of the interior of the isolation box 1. The water supply tank 7 is used to gradually add water to the water container 6 during use. A weighing component 8 is installed on the top of the isolation box 1. The weighing component 8 is used to connect with the lifting ring during use, so as to accurately weigh the total weight of the water container 6 and the water inside, that is, the strength of the wet molding sand.

[0018] An industrial computer 9 is fixedly installed on the door of the isolation box 1. The industrial computer 9 is used to control and operate the entire detection device. A camera 3 is fixedly installed on the bottom of the isolation box 1 through a support base. The camera 3 is used to capture visual features such as the expansion of cracks and the scattering of particles on the surface of the sand sample through image recognition. Combined with machine vision algorithms (such as edge detection and morphological analysis), the collapse critical point is identified.

[0019] Please see Figure 2 The structure of water supply tank 7: The water supply tank 7 includes a tank body 71, an electromagnetic flow valve 72, and a universal bamboo joint pipe 73. The tank body 71 is fixedly assembled with the isolation box 1. The lower side of the tank body 71 is connected to one end of the universal bamboo joint pipe 73 through the electromagnetic flow valve 72. The other end of the universal bamboo joint pipe 73 is located above the water tank 6.

[0020] The housing 71 is used to store water, while the electromagnetic flow valve 72 can stably discharge water, which is discharged into the water tank 6 through the universal bamboo joint tube 73. The universal bamboo joint tube 73 can be bent and fixed in shape at will, so that the water flow direction can be accurately directed to the water tank 6. When not in use, the universal bamboo joint tube 73 can also be bent to one side without affecting the removal and installation of the water tank 6.

[0021] The housing 71 is an existing component with a storage tank, a vent valve, a water inlet pipe, and a cover. The bottom of the storage tank is conical to facilitate the drainage of internal water, while the vent valve is used to balance the internal and external air pressure to avoid affecting the water flow. The water inlet pipe is used to replenish water into the storage tank, and the tank is sealed by a screw-on cover after completion.

[0022] The universal bamboo joint tube 73 is a type of tube that can be bent and fixed in shape at will. It is usually made up of multiple bamboo joint-like units connected together, which can flexibly adjust the angle and maintain stability.

[0023] Please see Figure 3 The structure of metering component 8: The metering component 8 includes a worm gear reducer motor 81, a winding reel 82, and a tension gauge 83. The worm gear reducer motor 81 is fixedly installed on the upper side of the isolation box 1. The winding reel 82 is fixedly installed on the output end of the worm gear reducer motor 81. One end of a steel cable is fixedly installed on the winding reel 82. The other end of the steel cable extends into the isolation box 1 and is fixedly installed with the tension gauge 83. An anti-detachment hook 84 is installed on the lower side of the tension gauge 83. The anti-detachment hook 84 is engaged with the lifting ring during use. A through hole is provided on the top of the isolation box 1 for the steel cable to pass through.

[0024] When the worm gear reducer motor 81 is working, it can rotate the winding wheel 82 to raise and lower the tension gauge 83 by winding and releasing the steel cable. When accurate weighing is required, the steel cable is released first, the tension gauge 83 is lowered, the anti-detachment hook 84 is attached to the lifting ring, and then the tension gauge 83 is raised. After stabilization, the weighing is completed and the data is read.

[0025] The worm gear reducer motor 81 is an existing component that has the structure of a worm gear reducer and a motor.

[0026] The dynamometer 83 is an existing instrument for measuring the magnitude of tensile force, capable of converting tensile force signals into readable numerical values.

[0027] To ensure the accuracy of monitoring the critical point of sand sample collapse: There are four cameras 3, which are distributed around the sand sample. By acquiring and analyzing images from all four sides, the monitoring accuracy is improved, so as to achieve the purpose of closing the electromagnetic flow valve 72 in a timely manner.

[0028] Please see Figure 4 The distribution of the omnidirectional ball 4: Multiple layers of universal balls 4 are fixedly installed on the inner circumference of the guide cylinder 5, with 2 to 4 layers. Each layer of universal balls 4 consists of 3 to 5 balls distributed in a circle. The balls of the universal balls 4 abut against the water tank 6. By setting the universal balls 4, the resistance when the guide cylinder 5 contacts the water tank 6 can be reduced without affecting the guiding and supporting function of the guide cylinder 5 on the water tank 6, so that the collected pressure data is more accurate.

[0029] The omnidirectional ball 4 is an existing component with structures such as ball bearings and housing.

[0030] The industrial computer 9 is preferably an embedded existing device used to receive data, process data, and issue instructions.

[0031] The working principle of this embodiment: During testing, the wet sand sample to be tested is placed under the guide tube 5 inside the isolation chamber 1. An empty water bucket 6 is placed inside the guide tube 5, with the water bucket 6 positioned on the sand sample. After aligning the universal bamboo tube 73, the door of the isolation chamber 1 is closed to create an isolation environment.

[0032] The electromagnetic flow valve 72 of the water supply tank 7 is activated by the industrial computer 9, so that the water in the tank 71 is gradually injected into the water container 6 through the universal bamboo joint pipe 73. The water container 6 is pressed vertically down into the sand sample by gravity in the guide tube 5, and the scale on its side wall can intuitively display the current pressure value.

[0033] When the sand sample is compressed, four cameras 3 distributed around the sand sample continuously collect images of the sand sample surface. Combined with machine vision algorithms, the images are used to identify collapse characteristics such as crack propagation and particle scattering to determine the critical point.

[0034] When camera 3 detects that the sand sample is in a critical state of collapse, industrial computer 9 immediately shuts off electromagnetic flow valve 72 to stop water injection, thus avoiding errors in the overall weight of water tank 6 and providing a scale for intuitive reading.

[0035] When precise weighing is required, the anti-detachment hook 84 is lowered and attached to the lifting ring via the metering component 8, and then the water tank 6 is lifted. The sample is then weighed precisely via the tensile tester 83. The value read by the tensile tester 83 is the wet strength value of the sand sample, thus completing the test.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for testing the wet strength of molding sand, comprising an isolation chamber (1), characterized in that: Inside the isolation box (1), a guide cylinder (5) is fixedly installed by a support beam. The guide cylinder (5) is vertically set. A water container (6) for pressing sand samples is installed inside the guide cylinder (5). A scale is set on the side wall of the water container (6) along the vertical direction. A lifting ring is fixedly installed on the upper side of the water container (6). A water supply tank (7) is fixedly installed on one side of the interior of the isolation box (1). A weighing component (8) is installed on the top of the isolation box (1). An industrial computer (9) is fixedly installed on the door of the isolation box (1). A camera (3) is fixedly installed on the bottom of the isolation box (1) via a support base.

2. The molding sand wet strength testing device according to claim 1, characterized in that: The water supply tank (7) includes a tank body (71), an electromagnetic flow valve (72), and a universal bamboo joint pipe (73). The tank body (71) is fixedly assembled with the isolation box (1). The lower side of the tank body (71) is connected to one end of the universal bamboo joint pipe (73) through the electromagnetic flow valve (72). The other end of the universal bamboo joint pipe (73) is located above the water tank (6).

3. The molding sand wet strength testing device according to claim 1, characterized in that: The metering component (8) includes a worm gear reducer motor (81), a winding reel (82), and a tension gauge (83). The worm gear reducer motor (81) is fixedly installed on the upper side of the isolation box (1). The winding reel (82) is fixedly installed on the output end of the worm gear reducer motor (81). One end of the steel cable is fixedly installed on the winding reel (82). The other end of the steel cable extends into the isolation box (1) and is fixedly installed with the tension gauge (83). An anti-detachment hook (84) is installed on the lower side of the tension gauge (83). The anti-detachment hook (84) is connected to the lifting ring during use. The top of the isolation box (1) has a through hole for the steel cable to pass through.

4. The molding sand wet strength testing device according to claim 1, characterized in that: The number of cameras (3) is four, and they are distributed around the sand sample.

5. The molding sand wet strength testing device according to claim 1, characterized in that: The inner circumference of the guide tube (5) is fixedly installed with multiple layers of universal balls (4), each layer of universal balls (4) consists of 3 to 5 balls distributed in a circle, and the balls of the universal balls (4) abut against the water tank (6).

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