Test device for simulating grain pile pressure on ventilation cage

Abstract

The utility model belongs to the technical field of strength detection of ventilation cages, and particularly relates to a test device for simulating the pressure of a grain pile on a ventilation cage, which comprises a rack, a stress box, a power component and a control end. The rack is a framework of the test device and is used for supporting and fixing other components; the stress box is fixedly arranged at the bottom of the rack, the ventilation cage is fixedly arranged in the stress box, and the stress box is used for uniformly transmitting pressure to the ventilation cage; the power assemblies are used for providing pressure for the stress box and are uniformly and fixedly arranged on a cross beam at the top of the rack; the control end is electrically connected with the power assembly and used for controlling the pressure output by the power assembly. According to the utility model, the stress condition of the ventilation cage can be accurately simulated, the repeatability and the standardization degree of the test can be enhanced, the performance comparison of ventilation cages of different batches and different models under the same condition becomes possible, and a powerful guarantee is provided for the quality control and the performance optimization of the ventilation cage.

Description

Technical Field

[0001] The utility model belongs to the technical field of the strength detection of ventilation cages, and particularly relates to a test device for simulating the pressure of a grain pile on a ventilation cage. Background Art

[0002] In the field of modern grain storage and management, ensuring the safe storage and quality maintenance of grain is of utmost importance. With the progress of technology, mechanical ventilation technology has become one of the important means to achieve green grain storage and improve the storage efficiency and quality of grain. As a key component in this technical system, the performance of the ventilation cage is directly related to the uniformity of air circulation in the granary, the effectiveness of operations such as chemical fumigation and controlled atmosphere, and thus affects the preservation quality of grain throughout the storage cycle.

[0003] Ventilation cages are usually designed and installed above the ground, penetrating the grain pile to provide necessary air circulation paths. In flat storage granaries and open bulk grain stacks, the role of ventilation cages is particularly significant. They can ensure that air penetrates the grain pile evenly and efficiently, promote gas exchange inside the grain pile, reduce temperature and humidity differences, and thus effectively inhibit the growth of mold and the occurrence of pests. However, during long-term use, ventilation cages need to continuously bear the huge pressure from the grain pile above, which poses extremely high requirements for the structural strength and stability of the ventilation cages.

[0004] However, despite the increasingly widespread application of ventilation cages in grain storage technology, the testing methods for whether the compressive strength of ventilation cages meets the standards are relatively scarce in the industry. Therefore, there is an urgent need to design a test device for simulating the pressure of a grain pile on a ventilation cage. Summary of the Invention

[0005] The purpose of the utility model is to solve the problem that it is difficult to conduct actual strength detection on ventilation cages in existing granaries, and a test device for simulating the pressure of a grain pile on a ventilation cage is proposed. This test device can simulate the test of a ventilation cage bearing the pressure of a grain pile in actual situations to detect whether the strength performance of the ventilation cage meets the standards.

[0006] To achieve the above purpose, the technical solution adopted is:

[0007] A test device for simulating the pressure of a grain pile on a ventilation cage, comprising:

[0008] A frame;

[0009] A stress box, which is fixedly arranged at the bottom of the frame, and the ventilation cage is arranged inside the stress box. The stress box is used to evenly transfer pressure to the ventilation cage;

[0010] At least two groups of power components, which are used to provide pressure to the stress box, and the power components are evenly and fixedly arranged on the cross beam at the top of the frame;

[0011] and a control end, which is electrically connected to the power assembly and is used to control the magnitude of the pressure output by the power assembly.

[0012] According to the device for simulating the fumigation test of a special air conditioner for grain storage bins of the present utility model, further, the force-bearing box includes a cover plate, and there is a clearance fit between the cover plate and the inner side wall of the force-bearing box.

[0013] According to the device for simulating the fumigation test of a special air conditioner for grain storage bins of the present utility model, further, at least two cushion plates are placed on the cover plate, and the cushion plates correspond to the power assembly one by one from top to bottom.

[0014] According to the device for simulating the fumigation test of a special air conditioner for grain storage bins of the present utility model, further, two oppositely placed baffles are inserted on the bottom plate of the force-bearing box, and the height of the baffles is greater than the height of the ventilation cage.

[0015] According to the device for simulating the fumigation test of a special air conditioner for grain storage bins of the present utility model, further, the ventilation cage is placed on the bottom plate of the force-bearing box, and both ends of the ventilation cage are respectively in contact with the two baffles.

[0016] According to the device for simulating the fumigation test of a special air conditioner for grain storage bins of the present utility model, further, the grain pile is tightly stacked between the cover plate and the outer surface of the ventilation cage.

[0017] According to the device for simulating the fumigation test of a special air conditioner for grain storage bins of the present utility model, further, the power assembly includes a hydraulic press and a hydraulic rod fixed on a cross beam at the top of the frame, the hydraulic press is electrically connected to the control end, the hydraulic rod is directly above its corresponding cushion plate, and the hydraulic press drives the hydraulic rod to press the cushion plate.

[0018] According to the device for simulating the fumigation test of a special air conditioner for grain storage bins of the present utility model, further, a sensor is arranged at the bottom end of the hydraulic rod, and the sensor is used to detect the pressure between the hydraulic rod and the cushion plate.

[0019] According to the device for simulating the fumigation test of a special air conditioner for grain storage bins of the present utility model, further, a plurality of reinforcing plates are fixed around the force-bearing box to increase the strength of the force-bearing box.

[0020] According to the device for simulating the fumigation test of a special air conditioner for grain storage bins of the present utility model, further, a plurality of handles are fixed on the cover plate.

[0021] By adopting the above technical solution, the beneficial effects obtained are:

[0022] The present utility model can simulate the situation where the ventilation cage is subjected to the pressure of the grain pile in the actual grain storage situation, so as to detect whether the strength of the ventilation cage meets the standard.

[0023] The utility model has a compact structure and is easy to operate, and can accurately simulate and quantitatively evaluate the force-bearing condition of the ventilation cage. This helps to enhance the repeatability and standardization of the test, makes it possible to compare the performance of ventilation cages of different batches and different models under the same conditions, and provides a strong guarantee for the quality control and performance optimization of the ventilation cage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments of the present utility model will be briefly introduced below. Among them, the drawings are only used to show some embodiments of the present utility model, rather than limiting all embodiments of the present utility model thereto.

[0025] Figure 1 is a schematic structural diagram of a test device for simulating the pressure of a grain pile on a ventilation cage of the present utility model;

[0026] Figure 2 is a schematic structural diagram of the force-bearing box of the present utility model;

[0027] Figure 3 is a side view of a test device for simulating the pressure of a grain pile on a ventilation cage of the present utility model.

[0028] The meanings represented by the serial numbers in the drawings are as follows:

[0029] 1. Frame;

[0030] 2. Force-bearing box, 201. Cover plate, 202. Cushion plate, 203. Baffle plate, 204. Reinforcing plate, 205. Handle, 206. Card slot;

[0031] 3. Hydraulic press, 301. Hydraulic rod, 302. Sensor;

[0032] 4. Ventilation cage, 401. Reinforcing rib;

[0033] 5. Computer, 6. Grain pile. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] In the following, the exemplary solutions of the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present utility model. Unless otherwise defined, the technical terms or scientific terms used in the present utility model should have the ordinary meanings understood by those of ordinary skill in the art.

[0035] As Figure 1As shown in the figure, the test device for simulating the pressure of a ventilation cage on a grain pile in this embodiment includes a frame 1, a force-bearing box 2, a power assembly, and a control terminal. The frame 1 is the skeleton of this test device and is used to support and fix other components. The force-bearing box 2 is fixedly arranged at the bottom of the frame 1 through bolts. The ventilation cage 4 is placed on the bottom plate inside the force-bearing box 2. The force-bearing box 2 is used to uniformly transmit pressure to the ventilation cage 4. There are at least two groups of power assemblies, which are used to provide a constant pressure to the force-bearing box 2, and the power assemblies are uniformly welded to the cross beam at the top of the frame 1. The control terminal is electrically connected to the power assembly and is used to control the magnitude of the pressure output by the power assembly. The power assembly uniformly transmits the pressure it provides to the ventilation cage 4 through the force-bearing box 2, thereby simulating the pressure-bearing effect of the ventilation cage 4 on the grain pile in the actual situation.

[0036] Preferably, the number of power assemblies is two, and the two power assemblies are symmetrically arranged on the cross beam at the top of the frame 1.

[0037] Preferably, the control terminal is a computer 5.

[0038] As Figure 1 and Figure 2 shown, the force-bearing box 2 includes a cover plate 201, and there is a clearance fit between the cover plate 201 and the inner side wall of the force-bearing box 2. Further, the clearance between the cover plate 201 and the inner side wall of the force-bearing box 2 is 1 mm.

[0039] As Figure 1 and Figure 2 shown, at least two cushion plates 202 are placed on the cover plate 201, and the cushion plates 202 correspond to the power assemblies one by one up and down.

[0040] Preferably, the number of cushion plates 202 is the same as the number of power assemblies, which is also two. The two cushion plates 202 are symmetrically placed on the cover plate 201 and are respectively located directly below the two power assemblies.

[0041] As Figure 2 shown, two oppositely arranged baffles 203 are inserted on the bottom plate of the force-bearing box 2, and the height of the baffles 203 is greater than the height of the ventilation cage 4.

[0042] Preferably, a group of parallel card slots 206 are opened on the bottom plate of the force-bearing box 2, and the two baffles 203 are respectively clamped in the two card slots 206.

[0043] Further, a plurality of groups of parallel card slots 206 are also opened on the bottom plate of the force-bearing box 2, which are used in cooperation with the baffles 203 for testing ventilation cages 4 of different models.

[0044] Further, the material of the baffle 203 is plastic.

[0045] As Figure 2As shown, the ventilation cage 4 is placed on the bottom plate of the force-bearing box 2, and both ends of the ventilation cage 4 are in contact with the two baffles 203 respectively.

[0046] As Figure 2 shown, the grain pile 6 is tightly packed between the cover plate 201 and the outer surface of the ventilation cage 4. Since the height of the baffle 203 is greater than the height of the ventilation cage 4, it prevents grain particles from flowing into the ventilation cage 4, ensuring the smooth progress of the test.

[0047] Further, after the grain pile 6 fills the space between the cover plate 201 and the ventilation cage 4, the cover plate 201 is covered on the grain pile 6; at the same time, the cover plate 201 is at the topmost part of the inner sidewall of the force-bearing box 2.

[0048] As Figure 1 and Figure 3 shown, the power assembly includes a hydraulic press 3 and a hydraulic rod 301 fixed on the crossbeam at the top of the frame 1. Among them, the hydraulic press 3 is electrically connected to the computer 5, the hydraulic rod 301 is directly above its corresponding backing plate 202, and the computer 5 controls the hydraulic press 3 to drive the hydraulic rod 301 to press against the backing plate 202.

[0049] The concentrated pressure generated by the hydraulic rod 301 directly acts on the backing plate 202 to protect the cover plate 201. When the concentrated pressure is too large, the backing plate 202 will be damaged first. At this time, only the backing plate 202 needs to be replaced, without replacing the cover plate 201, saving the test cost.

[0050] During the actual test process, the concentrated pressure generated by the hydraulic rod 301 is transmitted to the cover plate 201 through the backing plate 202. The cover plate 201 converts the concentrated pressure into a planar pressure evenly distributed on the entire grain pile 6, and then transmits it to the ventilation cage 4, so as to achieve the effect of simulating the pressure on the ventilation cage 4 in the actual situation.

[0051] As Figure 1 shown, a sensor 302 is installed at the bottom end of the hydraulic rod 301, and this sensor 302 is used to detect the pressure between the hydraulic rod 301 and the backing plate 202.

[0052] Further, the sensor 302 is electrically connected to the computer 5, and the pressure detected by the sensor 302 can be transmitted to the computer 5 in real time and a pressure value curve graph is generated and displayed on the screen of the computer 5.

[0053] As Figure 1 and Figure 2 shown, a plurality of reinforcing plates 204 are fixedly arranged around the force-bearing box 2 to increase the strength of the force-bearing box 2, prevent the force-bearing box 2 from cracking due to excessive pressure, and ensure the normal progress of the test.

[0054] As Figure 1 and Figure 2As shown in the figure, a plurality of handles 205 are fixedly arranged on the cover plate 201, which is convenient for the operator to grasp.

[0055] The working principle is as follows:

[0056] (1) The test steps of the present utility model are as follows:

[0057] S1. Place the ventilation cage 4 on the bottom plate of the force-bearing box 2, and snap the two baffle plates 203 into the two card slots 206 respectively to ensure that both ends of the ventilation cage 4 are in close contact with the two baffle plates 203.

[0058] S2. Slowly pour the grain particles into the force-bearing box 2 until the force-bearing box 2 is filled with grain particles to form a grain pile 6.

[0059] S3. Place the cover plate 201 on the grain pile 6, keep the cover plate 201 in full contact with the grain pile 6, and then place the two cushion plates 202 on the cover plate 201.

[0060] S4. Start the hydraulic press 3, the hydraulic rod 301 starts to extend and press the cushion plate 202. At the same time, the pressure value measured by the sensor 302 is transmitted to the computer 5 in real time, and a pressure value curve graph is generated and displayed on the screen of the computer 5.

[0061] When the pressure value reaches the preset pressure value, the hydraulic rod 301 stops extending and maintains a constant pressure.

[0062] S5. Wait until the test reaches a grain storage cycle and the test ends; the hydraulic rod 301 contracts and resets, and the ventilation cage 4 is disassembled from the force-bearing box 2.

[0063] (2) There are the following two situations for judging the strength qualification of the ventilation cage 4:

[0064] 1) Judgment during the test: The pressure value curve graph generated in real time in the above test step S4 can reflect the stress and deformation states of the ventilation cage 4. When the pressure value curve is always on a horizontal line in the later stage of the set test time, it indicates that the stress state of the ventilation cage 4 has not changed and the ventilation cage 4 has not deformed, then the strength of the ventilation cage 4 meets the standard. When there is an obvious inflection point (the pressure value decreases significantly) after a horizontal line in the later stage of the set test time in the pressure value curve, it indicates that the stress of the ventilation cage 4 has changed significantly (decreased) and the ventilation cage 4 has deformed greatly, then the strength of the ventilation cage 4 does not meet the standard.

[0065] 2) Judgment after the test: Remove the ventilation cage 4 in the above test step S5, and use a caliper to measure whether the ventilation cage 4 has obvious deformation. If the deformation degree does not exceed the standard value, it means that the ventilation cage 4 has not deformed and its strength meets the standard; if the deformation degree exceeds the standard value, it means that the ventilation cage 4 has deformed and its strength does not meet the standard.

[0066] It should be noted that when it is stated that one element is "connected", "coupled", or "linked" to another element, it may mean a direct connection, coupling, or linkage. However, it should be understood that there may be intermediate elements between the two; that is, it encompasses both direct and indirect positional relationships of connection.

[0067] It should be noted that the use of words such as "a" or "an" does not necessarily imply a limitation in quantity. Words such as "comprising" or "including" mean that the element or item preceding this word encompasses the elements or items listed after this word and their equivalents, without excluding other elements or items.

[0068] It should be noted that terms indicating orientation or positional relationships such as "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships. They are for the convenience of describing the present utility model, rather than meaning that the device or element referred to must have a specific orientation, be constructed, and operate in a specific orientation. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0069] The preferred embodiments for implementing the present utility model have been described in detail above. However, it should be understood that the functions of these embodiments are only for illustration purposes and do not limit the scope, application, or construction of the present utility model in any way. The protection scope of the present utility model is defined by the appended claims and their equivalent means. Those of ordinary skill in the art can make many changes to the foregoing embodiments under the teaching of the present utility model, and these changes all fall within the protection scope of the present utility model.

Claims

1. A test device for simulating the pressure of grain pile on a ventilation cage, characterized in that: include; frame; A force-bearing box is fixedly arranged at the bottom of the frame, and the ventilation cage is arranged inside the force-bearing box, and the force-bearing box is used to uniformly transmit pressure to the ventilation cage; At least two groups of power components, which are used to provide pressure to the force box, and the power components are evenly fixed on the crossbeams on the top of the frame; And a control end, which is electrically connected to the power component and is used to control the pressure output by the power component.

2. The test device for simulating the pressure of grain pile on the ventilation cage according to claim 1, characterized in that: The stress box comprises a cover plate, and there is a clearance fit between the cover plate and the inner side wall of the stress box.

3. The test device for simulating the pressure of grain pile on the ventilation cage according to claim 2, characterized in that: At least two pads are placed on the cover plate, and the pads correspond to the power components one by one above and below.

4. The test device for simulating the pressure of grain pile on the ventilation cage according to claim 2, characterized in that: Two baffles placed opposite to each other are inserted on the bottom plate of the stress box, and the height of the baffles is greater than the height of the ventilation cage.

5. The test device for simulating the pressure of grain pile on the ventilation cage according to claim 4, characterized in that: The ventilation cage is placed on the bottom plate of the force box, and two ends of the ventilation cage are respectively in contact with two baffles.

6. The test device for simulating the pressure of grain pile on the ventilation cage according to claim 2, characterized in that: The grain pile is tightly stacked between the cover plate and the outer surface of the ventilation cage.

7. The test device for simulating the pressure of grain pile on the ventilation cage according to claim 3, characterized in that: The power assembly includes a hydraulic press and a hydraulic rod fixed on the crossbeam on the top of the frame. The hydraulic press is electrically connected to the control end. The hydraulic rod is located directly above its corresponding pad. The hydraulic press drives the hydraulic rod to press the pad.

8. The test device for simulating the pressure of grain pile on the ventilation cage according to claim 7, characterized in that: A sensor is arranged at the bottom end of the hydraulic rod, and the sensor is used to detect the pressure between the hydraulic rod and the pad.

9. The test device for simulating the pressure of grain pile on the ventilation cage according to claim 1, characterized in that: A plurality of reinforcing plates are fixedly arranged around the stress-bearing box to increase the strength of the stress-bearing box.

10. The test device for simulating the pressure of grain pile on the ventilation cage according to claim 2, characterized in that: A plurality of handles are fixedly arranged on the cover plate.

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