Pressure resistance testing device for chemical storage tank

Abstract

The invention relates to the technical field of pressure resistance testing of containers and tanks, in particular to a pressure resistance testing device for a chemical storage tank. Comprising a base and a stand column on the base. The stand column is horizontally connected with the test rod; folding grooves are uniformly formed in the arc-shaped outer wall of the test rod in the circumferential direction; a central groove is formed in the center of the test rod; the central groove is communicated with the folding groove through a first sliding groove; the central groove is connected with a central block in a sliding manner; the central block is in threaded transmission connection with a first screw driven by a first motor; the folded test rod drives the test plate to extend into the inner side of the chemical storage tank along the opening, the test plate is controlled to expand and extrude from inside to outside on the inner side of the chemical storage tank, and compared with a mode of extruding from outside to inside for testing, the pressure resistance test effect of the chemical storage tank can be better represented; meanwhile, compared with a medium extrusion mode, the testing efficiency is simpler and quicker.

Description

Technical Field

[0001] This invention relates to the field of pressure resistance testing technology for containers and tanks, specifically a pressure resistance testing device for chemical storage tanks. Background Technology

[0002] Existing pressure resistance testing methods for chemical storage tanks are mainly designed around "fluid medium storage tanks" and are divided into two categories: external pressure and internal pressure. The external pressure method applies compressive loads to the outer wall of the storage tank using equipment such as presses. It can only simulate scenarios such as external collisions and soil pressure on the storage tank, and cannot reflect the core working condition of "the internal medium exerting force on the tank wall" in the actual use of solid medium storage tanks. The test results lack specificity. The internal pressure method generally uses the method of filling the tank with liquid or gas to simulate the load of the internal medium through hydrostatic pressure. Although this method matches the actual stress of fluid medium storage tanks, it is completely unsuitable for solid medium storage tanks. On the one hand, solid chemicals do not generate static pressure uniformly acting on the tank wall like fluids. Instead, they exert non-uniform loads on the tank wall through localized pressure formed by accumulation and localized impact pressure during loading and unloading. The "uniform pressure" scenario of liquid filling and gas filling tests is completely out of touch with the actual stress experienced by solid medium storage tanks. On the other hand, liquid filling tests require cumbersome processes such as medium injection, discharge, recycling, and tank cleaning, while gas filling tests require precise control of the pressurization rate and holding time. This not only results in lengthy testing cycles but also increases subsequent cleaning costs due to liquid residue. Furthermore, controlling gas pressure stability is difficult. Neither of these methods can adjust the testing mode to meet the "localized non-uniform load" requirements of solid medium storage tanks, leading to a long-standing lack of suitable technical solutions for pressure resistance testing of solid medium storage tanks. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention proposes a pressure resistance testing device for chemical storage tanks. This invention uses a folded test rod to drive a test plate to extend into the inside of the chemical storage tank through an opening, and controls the test plate to expand and compress from the inside out inside the chemical storage tank. Compared with the method of compressing from the outside in, this method is more representative of the pressure resistance test effect of the chemical storage tank. At the same time, compared with the method of using a medium to compress, the test efficiency is simpler and faster.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows: A pressure resistance testing device for chemical storage tanks, comprising a base and a column on the base; a test rod is horizontally connected to the column; a stacking groove is uniformly arranged along the circumference of the arc-shaped outer wall of the test rod; a central groove is provided at the center of the test rod; the central groove and the stacking groove are connected through a first sliding groove; a central block is slidably connected to the central groove; a first screw driven by a first motor is threadedly connected to the central block; a first slider connected to the central block is slidably connected in the first sliding groove; two hinged arms are provided in the stacking groove; the included angle between the two hinged arms and the stacking groove is less than 180 degrees; one hinged arm is hinged to the first slider, and the other hinged arm is hinged to the end of the stacking groove away from the column; a test plate with a pressure sensor is connected to the end of one hinged arm away from the first slider.

[0005] Preferably, the upper surface of the base is provided with a movable groove; a movable plate is slidably connected to the movable groove from left to right; a second screw is rotatably connected to the movable plate along the length direction and threadedly driven by the movable groove; the second screw is driven by a second motor; a fourth sliding groove is vertically provided on the side of the column facing the test rod; a fourth slider fixed to the test rod is slidably connected to the fourth sliding groove from top to bottom; a fourth screw driven by a fourth motor is rotatably connected to the upper and lower inner walls of the fourth sliding groove; the fourth screw and the fourth slider are threadedly connected.

[0006] Preferably, the lower end of the column is slidably connected to the third groove on the upper surface of the base; the upper surface of the base is provided with two third support blocks; the two third support blocks are rotatably connected to a third screw driven by a third motor; the third screw is threadedly connected to the column; the upper surface of the movable plate is provided with a rolling groove; the left and right inner walls of the rolling groove are rotatably connected to rotating rollers; the rotating roller at the lowest position is driven by a fifth motor.

[0007] Preferably, the test block is rotatably connected to the two hinged arms at the hinged position; a test groove is provided on the inner side of the test plate along the axial direction of the test rod; the test block is slidably connected in the test groove; the side of the test block away from the column is connected to the wall of the test groove by a first spring; the pressure sensor is embedded on the outer side of the test plate.

[0008] Preferably, the first slider has a bolt hole that extends radially through the test rod; the outer wall of the polygonal central block has a threaded hole corresponding to the bolt hole; and a first bolt connected to the threaded hole passes through the bolt hole.

[0009] Preferably, a magnet is provided inside the test rod; the test plate is made of magnetic material; and the magnet is capable of magnetically attracting the test plate.

[0010] Preferably, the test rod is composed of a left rod, a middle rod, and a right rod connected sequentially from left to right; the left rod is connected to the column; the first motor and the stacking groove are disposed on the right rod; the two ends of the middle rod are hinged to the left rod and the right rod through torsion springs; the hinge directions of the ends of the middle rod are perpendicular to each other.

[0011] Preferably, the central rod is composed of two neutron rods, left and right; one of the neutron rods has a rectangular groove on the side near the other neutron rod; the wall of the rectangular groove extends outward and is threadedly connected to a second bolt; a rectangular rod is slidably connected inside the rectangular groove; the rectangular rod is fixedly connected to the other neutron rod.

[0012] Preferably, the right end of the test rod away from the column is set in a conical shape; the test plate has guide angles at both ends.

[0013] The beneficial effects of the present invention are as follows: 1. This invention uses a folded test rod to drive a test plate to extend into the inside of a chemical storage tank through an opening, and controls the test plate to expand and compress from the inside out inside the chemical storage tank. Compared with the method of compressing from the outside in, this method is more representative of the pressure resistance test effect of the chemical storage tank. At the same time, compared with the method of using a medium to compress, the test efficiency is simpler and faster.

[0014] 2. As the first motor continues to rotate, the two hinged arms will bend outwards. The test block is rotatably connected to the hinged position of the two hinged arms. Therefore, the test block will not affect the bending of the two hinged arms. During the bending process of the two hinged arms, the hinged position of the two hinged arms will drive the test block to move outwards and away from the column. Since the test plate is pressed against the inner wall of the chemical storage tank, and there is friction between the test plate and the inner wall of the chemical storage tank, the test plate cannot move to the right with the rightward movement of the test block. This avoids the test plate scratching the chemical storage tank and affecting the accuracy of the pressure resistance test.

[0015] 3. The number of test plates in this invention can be adjusted according to the pressure resistance test requirements of chemical storage tanks. For small chemical storage tanks or tanks with small inner wall curvature, the number of test plates used can be reduced to avoid mutual interference or excessive compression between test plates, which may lead to test errors. For large storage tanks or scenarios that require simultaneous testing at multiple points, the number of test plates used can be increased to achieve simultaneous detection of multiple areas of the inner wall of the storage tank and improve test efficiency. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a three-dimensional view of the pressure resistance test of this invention; Figure 2 It is a perspective view of the present invention; Figure 3 This is a perspective view of the test rod in this invention; Figure 4 This is a structural diagram of the central rod in this invention; Figure 5 This is a perspective view of the right rod in this invention; Figure 6 yes Figure 5 A stereoscopic view from another angle; Figure 7 yes Figure 6 Enlarged view of point A in the middle; Figure 8 This is a cross-sectional view of the right rod along the axial direction in this invention; Figure 9 This is a radial cross-sectional view of the right rod in this invention; Figure 10 This is a schematic diagram showing the connection between the central block and the first slider in this invention; Figure 11 yes Figure 10 Enlarged view of point B in the middle; Figure 12 This is a diagram showing the location of the test slot in this invention.

[0018] In the diagram: Base 1, Moving groove 11, Second screw 12, Second motor 13, Third slide groove 14, Third support block 15, Third motor 16, Third screw 17, Column 2, Fourth slide groove 21, Fourth slider 22, Fourth motor 23, Fourth screw 24, Test rod 3, Stacking groove 31, Center groove 32, First slide groove 33, Magnet 34, Left rod 35, Middle rod 36, Torsion spring 361, Neutron rod 362, Rectangular groove 363, Second bolt 364, Rectangular rod 365, Right rod 37, Center block 4, First screw 41, First motor 42, First slider 43, Bolt hole 44, Threaded hole 45, First bolt 46, Hinge arm 5, Test plate 6, Pressure sensor 61, Test block 62, Test groove 63, First spring 64, Guide angle 65, Moving plate 7, Rolling groove 71, Rotating roller 72, Fifth motor 73, Baffle 74. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] like Figures 1 to 12 As shown, the present invention includes the following embodiments: Example 1: A pressure resistance testing device for chemical storage tanks includes a base 1 and a column 2 on the base 1; the column 2 is horizontally connected to a test rod 3 to the right; the arc-shaped outer wall of the test rod 3 is uniformly provided with a stacking groove 31 along the circumference; a central groove 32 is provided in the center of the test rod 3; the central groove 32 and the stacking groove 31 are connected through a first sliding groove 33; a central block 4 is slidably connected to the central groove 32; the central block 4 is threadedly connected to a first screw 41 driven by a first motor 42; a first slider 43 connected to the central block 4 is slidably connected in the first sliding groove 33; two hinged arms 5 are provided in the stacking groove 31; the included angle between the two hinged arms 5 and the stacking groove 31 is less than 180 degrees; one hinged arm 5 is hinged to the first slider 43, and the other hinged arm 5 is hinged to the end of the stacking groove 31 away from the column 2; one hinged arm 5 is connected to a test plate 6 with a pressure sensor 61 at the end away from the first slider 43.

[0021] After the chemical storage tank is processed, it is tilted and its opening is aligned with the column 2 to the left. The chemical storage tank is then fitted onto the outside of the test rod 3, meaning the end of the test rod 3 furthest from the column 2 enters the interior of the chemical storage tank through its opening. The first motor 42 is then rotated, its outer wall fixed to the inside of the test rod 3. The first motor 42 drives the first screw 41 to rotate, which is rotatably connected to the test rod 3. During rotation, the first screw 41 causes the center block 4 to slide along the center groove 32. The cross-section of the center groove 32 and the center block 4 can be polygonal, such as hexagonal, to accommodate the sliding of the center block 4 along the center groove 32. As the center block 4 slides away from the column 2 along the center groove 32, it causes the first slider 43 to slide along the first sliding groove 33. As the first slider 43 moves away from the column 2, it causes the two hinged arms 5 to fold outwards. The two hinged arms 5 then... The test plate 6 is moved away from the test rod 3 and eventually rests against the inner wall of the chemical storage tank. A pressure sensor 61 is provided on the side of the test plate 6 that is in contact with the inner wall of the chemical storage tank. The pressure sensor 61 can sense the pressure of the test plate 6 against the inner wall of the chemical storage tank. Under the specified pressure, if the outer surface of the chemical storage tank does not break during the process of the test plate 6 against the inner wall of the chemical storage tank, it means that the pressure resistance performance of the chemical storage tank is qualified; otherwise, it is unqualified. After the pressure resistance test of the chemical storage tank is completed, the control motor reverses and drives the first screw 41 to reverse. During the reversal of the first screw 41, the center block 4 will move along the center groove 32 towards the column 2. The center block 4 will drive the first slider 43 to move along the first sliding groove 33 towards the column 2. In this way, the hinge arm 5 will be folded in the folding groove 31, and the test plate 6 will also be separated from the inner wall of the chemical storage tank and move closer to the test rod 3. Then, the control test rod 3 can be moved out of the opening position of the chemical storage tank. This invention is mainly aimed at chemical storage tanks made of non-metallic materials, such as composite materials or special plastics. The invention uses a folded test rod 3 to drive the test plate 6 to extend into the inside of the chemical storage tank through the opening, and controls the test plate 6 to expand and compress from the inside to the outside of the chemical storage tank. Compared with the method of compressing from the outside to the inside, this method is more representative of the pressure resistance test effect of the chemical storage tank. At the same time, compared with the method of using medium compression, the test efficiency is simpler and faster.

[0022] Example 2: A movable groove 11 is provided on the upper surface of the base 1; a movable plate 7 is slidably connected to the movable groove 11; a second screw 12, which is threadedly connected to the movable plate 7, is rotatably connected to the movable groove 11 along its length; the second screw 12 is driven by a second motor 13; a fourth sliding groove 21 is vertically provided on the side of the column 2 facing the test rod 3; a fourth slider 22, which is fixed to the test rod 3, is slidably connected to the fourth sliding groove 21; a fourth screw 24, driven by a fourth motor 23, is rotatably connected to the upper and lower inner walls of the fourth sliding groove 21; the fourth screw 24 and the fourth slider 22 are threadedly connected.

[0023] In this embodiment, the lower end of the column 2 is slidably connected to the third slide groove 14 on the upper surface of the base 1; the upper surface of the base 1 is provided with two third support blocks 15; the two third support blocks 15 are rotatably connected to the third screw 17 driven by the third motor 16; the third screw 17 is threadedly connected to the column 2; the upper surface of the moving plate 7 is provided with an arc-shaped rolling groove 71; the left and right inner walls of the rolling groove 71 are rotatably connected to the rotating rollers 72; the lowest rotating roller 72 is driven by the fifth motor 73.

[0024] Initially, the moving plate 7 is located at the right end of the moving groove 11. As the chemical storage tank is placed on the upper surface of the moving plate 7, it rests on the upper surface of multiple rotating rollers 72. The height of the multiple rotating rollers 72 decreases as they approach the center, making the chemical storage tank more stable. The outer wall of the fourth motor 23 is fixedly connected to the column 2. During the rotation of the fourth motor 23, it drives the fourth screw 24 to rotate. During the rotation of the fourth screw 24, it drives the fourth slider 22 to slide up and down within the fourth sliding groove 21. During the up and down movement of the fourth slider 22, it drives the test rod 3 to move up or down, thereby changing the vertical position of the test rod 3. The outer wall of the third motor 16 is fixedly connected to the third support block 15. During the rotation of the third motor 16, it drives the third screw 17 to rotate. During the rotation of the third screw 17, it drives the column 2 to move back and forth along the third sliding groove 14, thus adjusting the back and forth position of the test rod 3. After the test rod 3 has completed its position adjustment, the second motor 13 starts working. The outer wall of the second motor 13 is fixedly connected to the support block 15. The base 1 is fixedly connected. During the rotation of the second motor 13, the second screw 12 will rotate, causing the moving plate 7 to slide to the left along the moving groove 11. During the leftward movement of the moving plate 7, the opening of the chemical storage tank will be placed on the outside of the test rod 3, and the test rod 3 will enter the interior of the chemical storage tank. Then, the first motor 42 is controlled to rotate, and the test plate 6 presses against the inner wall of the chemical storage tank to perform a pressure test. After completing the test on one part of the inner wall of the chemical storage tank, the test plate 6 is slightly loosened from the inner wall of the chemical storage tank. Then, the fifth motor 73 is controlled to rotate. The outer wall of the fifth motor 73 is fixedly connected to the moving plate 7. During the rotation of the fifth motor 73, the lowest position roller 72 will rotate. During the rotation of the roller 72, the contacting chemical storage tank will rotate, thereby changing the position of the test plate 6 against the inner wall of the chemical storage tank. This allows multiple positions on the inner wall of the chemical storage tank to be tested for pressure resistance, resulting in a wider and more accurate testing range. After the pressure test on the inner wall of the chemical storage tank is completed, the moving plate 7 is controlled to move to the right, which in turn drives the chemical storage tank to rotate.

[0025] Example 3: The two hinged arms 5 are rotatably connected to the test block 62 at the hinged position; the inner side of the test plate 6 is provided with a test groove 63 along the axial direction of the test rod 3; the test block 62 is slidably connected in the test groove 63; the side of the test block 62 away from the column 2 is connected to the groove wall of the test groove 63 by a first spring 64; the pressure sensor 61 is embedded on the outer side of the test plate 6; the pressure sensor 61 protrudes from the outer side of the test plate 6.

[0026] During the rotation of the first motor 42, the first screw 41 will rotate. The rotation of the first screw 41 will cause the two hinged arms 5, which are hinged together, to bend outwards. During this outward bending, the test block 62 and the test plate 6 will move closer to the inner wall of the chemical storage tank. After the test plate 6 contacts the inner wall of the chemical storage tank, as the first motor 42 continues to rotate, the two hinged arms 5 will continue to bend outwards. The test block 62 is rotatably connected to the hinged position of the two hinged arms 5, so the test block 62 will not affect the bending of the two hinged arms 5. During the bending process of the two hinged arms 5, the hinged position of the two hinged arms 5 will cause the test block 62 to move outwards and away from the column 2. Since the test plate 6 is pressed against the inner wall of the chemical storage tank, there is friction between the test plate 6 and the inner wall of the chemical storage tank. The test plate 6 cannot move to the right as the test block 62 moves to the right, thus avoiding scratching the chemical storage tank and affecting the accuracy of the pressure test. The test block 62 will slide along the test groove 63 on the inner side of the test plate 6, overcoming the first spring 64, so that the test block 62 can transmit greater force to the test plate 6, ensuring the smooth progress of the pressure test on the inner wall of the chemical storage tank. After the pressure test on the inner wall of the chemical storage tank is completed, the control hinge arm 5 is folded towards the inside of the folding groove 31. As the hinge arm 5 approaches the test rod 3, the test block 62 will drive the test plate 6 away from the inner wall of the chemical storage tank. After the test plate 6 is no longer in contact with the inner wall of the chemical storage tank, the test block 62 will be pushed by the first spring 64 to move in the test groove 63, so that the relative position of the test block 62 and the test plate 6 is reset.

[0027] Example 4: The first slider 43 is provided with a bolt hole 44 through the test rod 3 radially; the outer wall of the polygonal center block 4 is provided with a threaded hole 45 corresponding to the bolt hole 44; a first bolt 46 connected to the threaded hole 45 passes through the bolt hole 44.

[0028] In this embodiment, a magnet 34 is provided inside the test rod 3; the test plate 6 is made of magnetic material; and the magnet 34 can magnetically attract the test plate 6.

[0029] Before conducting the pressure resistance test on the inner wall of the chemical storage tank, the number of test plates 6 to be activated is adjusted. The total number of test plates 6 is an even number. To reduce the number of test plates 6, the first bolt 46 needs to be reversed. After reversing the reversal, the first bolt 46 will be unscrewed from the threaded hole 45. Finally, the first bolt 46 can be directly pulled out of the threaded hole 45, thus disconnecting the first slider 43 from the center block 4 and reducing the number of connections between the center block 4 and the first slider 43. With the first bolt 46 screwed into the corresponding threaded hole 45, the connection between the first slider 43 and the center block 4 is maintained. For ease of description, the first slider 43 connected to the center block 4 is called the activated first slider 43, and the first slider 43 not connected to the center block 4 is called the deactivated first slider 43. This makes the first slider... The number of activated and deactivated blocks 43 is adjustable. Thus, as the central block 4 moves away from the column 2 along the central groove 32, the central block 4 only drives the activated first slider 43 to move away from the column 2, thereby triggering the corresponding number of test plates 6 to move outward for pressure testing. The untriggered test plates 6 are then magnetically attached to the outer wall of the test rod 3. In this embodiment, the number of test plates 6 can be adjusted according to the pressure testing requirements of the chemical storage tank. For small chemical storage tanks or tanks with small inner wall curvature, the number of activated test plates 6 can be reduced to avoid mutual interference or excessive compression between test plates 6, leading to testing errors. For large storage tanks or scenarios requiring simultaneous testing at multiple points, the number of activated test plates 6 can be increased to achieve simultaneous detection of multiple areas of the tank's inner wall, improving testing efficiency.

[0030] Example 5: The test rod 3 is composed of a left rod 35, a middle rod 36 and a right rod 37 connected sequentially from left to right; the left rod 35 is connected to the column 2; the first motor 42 and the stacking groove 31 are set on the right rod 37; the two ends of the middle rod 36 are hinged to the left rod 35 and the right rod 37 through torsion springs 361; the hinge directions of the ends of the middle rod 36 are perpendicular to each other.

[0031] When the opening of the chemical storage tank is eccentric, the middle rod 36 will be inserted into the chemical storage tank along with the test rod 3. During the rotation of the first motor 42, the first screw 41 will be rotated, thereby triggering multiple test plates 6 to begin to expand. Since the middle rod 36 in the test rod 3 is located inside the chemical storage tank, the expansion of multiple test plates 6 will cause the right rod 37 and the middle rod 36 to bend and deviate from the left rod 35. The end of the middle rod 36 is hinged to the left rod 35 and the right rod 37 through the torsion spring 361. This structure can be understood as a universal joint. In this way, the central axis of the right rod 37 will gradually approach and coincide with the central axis of the chemical storage tank, thus meeting the pressure resistance test requirements of the eccentrically opened chemical storage tank. After the pressure resistance test of the chemical storage tank is completed, the test plates 6 are controlled to fold up. The left rod 35, the middle rod 36, and the right rod 37 return to a straight line under the action of the torsion spring 361, thus allowing the test rod 3 to be pulled out from the inside of the chemical storage tank. In this embodiment, the hinge direction of the end of the middle rod 36 is perpendicular.

[0032] Example 6: The central rod 36 is composed of two left and right sub-rods 362; one of the sub-rods 362 has a rectangular groove 363 on the side close to the other sub-rod 362; the wall of the rectangular groove 363 extends outward and is threadedly connected to a second bolt 364; a rectangular rod 365 is slidably connected inside the rectangular groove 363; the rectangular rod 365 is fixedly connected to the other sub-rod 362; baffles 74 are fixedly connected to the left and right ends of the movable plate 7.

[0033] After loosening the second bolt 364, the second bolt 364 will disengage from the rectangular rod 365, unlocking the rectangular rod 365 from the rectangular groove 363. Then, control the two central rods 362 to move away from or towards each other, and the rectangular rod 365 will move within the rectangular groove 363, making the length of the central rod 36 adjustable. Then, tighten the second bolt 364. In some chemical storage tanks with eccentric openings, the central rod 36 needs to be inserted into the inside of the chemical storage tank to conduct pressure tests. The length of the central rod 36 directly affects the test position in the axial direction of the chemical storage tank. Thus, by adjusting the length of the central rod 36, the test range of the chemical storage tank can be expanded. The baffle 74 serves to limit and block the chemical storage tank.

[0034] Example 7: The right rod 37 of the test rod 3 is set in a conical shape at the end away from the column 2; the test plate 6 is provided with guide angles 65 on both the left and right ends.

[0035] Even with the right end of test rod 3 slightly offset from the opening of the chemical storage tank, test rod 3 can still smoothly enter the inside of the chemical storage tank under guidance, improving the efficiency of pressure test preparation.

[0036] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure resistance testing device for chemical storage tanks, comprising a base and a column on the base; characterized in that: The column is horizontally connected to the test rod; the arc-shaped outer wall of the test rod is uniformly provided with stacking grooves along the circumference; the center of the test rod is provided with a central groove; the central groove and the stacking groove are connected through a first sliding groove; the central groove is slidably connected to a central block; the central block is threadedly connected to a first screw driven by a first motor; a first slider connected to the central block is slidably connected in the first sliding groove; the stacking groove is provided with two hinged arms that are hinged to each other; the included angle between the two hinged arms and the stacking groove is less than 180 degrees; one hinged arm is hinged to the first slider, and the other hinged arm is hinged to the end of the stacking groove away from the column; the end of one hinged arm away from the first slider is connected to a test plate with a pressure sensor.

2. The pressure resistance testing device for chemical storage tanks according to claim 1, characterized in that: The upper surface of the base is provided with a movable groove; a movable plate is slidably connected to the movable groove from left to right; the movable groove is rotatably connected to a second screw threadedly connected to the movable plate along its length; the second screw is driven by a second motor; a fourth sliding groove is vertically provided on the side of the column facing the test rod; a fourth slider fixed to the test rod is slidably connected to the fourth sliding groove from top to bottom; the upper and lower inner walls of the fourth sliding groove are rotatably connected to a fourth screw driven by a fourth motor; the fourth screw and the fourth slider are threadedly connected.

3. The pressure resistance testing device for chemical storage tanks according to claim 2, characterized in that: The lower end of the column is slidably connected to the third groove on the upper surface of the base; the upper surface of the base is provided with two third support blocks; the two third support blocks are rotatably connected to a third screw driven by a third motor; the third screw is threadedly connected to the column; the upper surface of the movable plate is provided with a rolling groove; the left and right inner walls of the rolling groove are rotatably connected to rotating rollers; the rotating roller at the lowest position is driven by a fifth motor.

4. The pressure resistance testing device for chemical storage tanks according to claim 1, characterized in that: The test block is rotatably connected to the two hinged arms at their hinged positions; a test groove is provided on the inner side of the test plate along the axial direction of the test rod; the test block is slidably connected in the test groove; the side of the test block away from the column is connected to the wall of the test groove by a first spring; the pressure sensor is embedded on the outer side of the test plate.

5. The pressure resistance testing device for chemical storage tanks according to claim 1, characterized in that: The first slider has a bolt hole that runs radially through the test rod; the outer wall of the polygonal center block has a threaded hole corresponding to the bolt hole; and a first bolt that is connected to the threaded hole passes through the bolt hole.

6. The pressure resistance testing device for chemical storage tanks according to claim 5, characterized in that: The test rod contains a magnet; the test plate is made of magnetic material; and the magnet is capable of magnetically attracting the test plate.

7. The pressure resistance testing device for chemical storage tanks according to claim 1, characterized in that: The test rod is composed of a left rod, a middle rod, and a right rod connected sequentially from left to right; the left rod is connected to the column; the first motor and the stacking groove are mounted on the right rod; the two ends of the middle rod are hinged to the left and right rods by torsion springs; the hinge directions of the ends of the middle rod are perpendicular to each other.

8. The pressure resistance testing device for chemical storage tanks according to claim 7, characterized in that: The central rod is composed of two neutron rods, left and right; one of the neutron rods has a rectangular groove on the side close to the other neutron rod; the wall of the rectangular groove extends outward and is threaded with a second bolt; a rectangular rod is slidably connected inside the rectangular groove; the rectangular rod is fixedly connected to the other neutron rod.

9. The pressure resistance testing device for chemical storage tanks according to claim 7, characterized in that: The right end of the test rod, away from the column, is cone-shaped; the test plate has guide angles on both the left and right ends.

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