Sealing detection device for agricultural machinery oil cylinder production

Abstract

The invention belongs to the technical field of oil cylinder production, and discloses a sealing detection device for agricultural machinery oil cylinder production, which comprises a detection water tank, a bearing table for bearing a detected oil cylinder is arranged in the detection water tank, the interior of the bearing table is of a hollow structure, and water inlets are formed in two opposite sides of the bearing table; cover plates used for sealing the water inlet are rotationally connected to the bearing table, a water entering mechanism used for driving the bearing table to move up and down is arranged above the detection water tank, and a linkage assembly used for driving the two cover plates to rotate to open the water inlet is arranged in the detection water tank; a pollution discharge mechanism for driving the bearing table to rotate is arranged in the detection water tank; through cooperation of the water inlet mechanism, the bearing table can be driven to drive the oil cylinder located on the upper surface of the bearing table to enter the detection water tank for detection work.

Description

Technical Field

[0001] The invention belongs to the technical field of oil cylinder production, and in particular is a sealing detection device for producing oil cylinders of agricultural machinery. Background Art

[0002] Agricultural machinery refers to various machines used in the production process of crop planting and animal husbandry, as well as in the primary processing and treatment of agricultural and animal products. Agricultural machinery includes agricultural power machinery, farmland construction machinery, soil tillage machinery, planting and fertilization machinery, plant protection machinery, farmland irrigation and drainage machinery, crop harvesting machinery, agricultural product processing machinery, animal husbandry machinery and agricultural transport machinery.

[0003] The oil cylinder, also known as the hydraulic cylinder, is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating or swinging motion. It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines. The output force of the hydraulic cylinder is proportional to the effective area of ​​the piston and the pressure difference on both sides; the hydraulic cylinder is basically composed of a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device. The buffer device and the exhaust device depend on the specific application, and other devices are indispensable.

[0004] In the prior art, sealing detection of hydraulic cylinders is often performed by immersing the hydraulic cylinders in water to observe whether there is leakage. However, after the hydraulic cylinders are immersed in water, dust adhering to their surfaces and residual oil will be brought into the water. If a hydraulic cylinder with sealing problems is detected, the hydraulic oil inside it will also leak into the water. When the water becomes turbid, it will affect the observation of the leakage of the hydraulic cylinder. At the same time, the floating oil makes it difficult to determine whether there is a hydraulic oil leak. Summary of the invention

[0005] In order to solve the problem in the above background technology that it is difficult to observe the water after the water becomes dirty, the present invention provides a sealing detection device for the production of oil cylinders of agricultural machinery.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A sealing detection device for the production of oil cylinders of agricultural machinery, comprising a detection water tank, a bearing platform for bearing the oil cylinder to be detected is arranged in the detection water tank, the bearing platform is a hollow structure inside, and water inlets are opened on two opposite sides, and a cover plate for sealing the water inlet is rotatably connected to the bearing platform; A water entry mechanism for driving the supporting platform to move up and down is provided above the detection water tank; The detection water tank is provided with a linkage assembly for driving the two cover plates to rotate and open the water inlet; The detection water tank is provided with a sewage discharge mechanism for driving the bearing platform to rotate.

[0007] Preferably, the water entry mechanism includes a mounting platform sleeved on the outer wall of the detection water tank, an electric telescopic rod is vertically fixed to the upper end of the mounting platform, a cross bar is vertically fixed to the top of the electric telescopic rod, a plug rod is penetrated by the free end of the cross bar and is vertically distributed therewith, and the plug rod is slidably connected to the cross bar up and down.

[0008] Preferably, the upper end of the insertion rod is fixedly connected to a limiting disc, the lower end of the insertion rod is fixedly connected to a U-shaped tube, and a spring sleeved on the surface of the insertion rod is fixedly connected between the U-shaped tube and the cross bar.

[0009] Preferably, the two ends of the U-shaped tube are commonly fixed with a same annular seat, an annular channel is rotatably connected inside the annular seat, and the bearing platform is fixed on the lower surface of the annular channel.

[0010] Preferably, an annular sealing plate is rotatably connected to the upper surface of the annular channel to seal it, an L tube is fixedly connected between the annular sealing plate and the U-shaped tube, both ends of the L tube are respectively connected to the U-shaped tube and the annular channel, the supporting platform is connected to the annular channel, and a vertical tube is vertically fixed on the U-shaped tube and is connected to the interior of the tube.

[0011] Preferably, the linkage assembly includes two gears located outside the support platform and coaxially fixed to the two cover plates respectively, and a first rack is fixed on the inner wall of the detection water tank, and a second rack is located above the first rack.

[0012] Preferably, the sewage discharge mechanism includes an internal threaded sleeve fixed on the upper surface of the supporting platform, a rectangular frame is inserted on the cross bar, a threaded rod is fixedly connected to the lower surface of the rectangular frame, the threaded rod and the internal threaded sleeve are adapted to each other, and two symmetrically distributed positioning plates close to the bottom of the detection water tank are fixedly connected to the inner wall of the detection water tank.

[0013] Preferably, two round rods are passed through the side wall of the detection water tank, one end of the round rod located outside the detection water tank is fixed with a round plate, and a spring 2 mounted on the round rod is fixedly connected between the round plate and the detection water tank.

[0014] Preferably, a telescopic rod 2 is fixed on the outer wall of the detection water tank, both ends of the telescopic rod 2 are bent, and the end away from the detection water tank is fixedly connected to a top plate, four bending rods symmetrically distributed in pairs are fixedly connected to the lower surface of the top plate, and a clamping block is fixedly connected between the free ends of two adjacent bending rods on the left and right.

[0015] Preferably, a rectangular groove for the rectangular frame to pass through and out is opened on the upper surface of the top plate, and the card block is located in an inclined state on the side close to the detection water tank, and is inclined from top to bottom from the side close to the detection water tank to the side away from the detection water tank.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention can drive the bearing platform to drive the oil cylinder located on the upper surface thereof to enter the detection water tank for detection work by arranging the cooperation of the water entry mechanism.

[0017] The present invention sets the cooperation of the linkage assembly, when the water entry mechanism drives the bearing platform to move downward to the bottom of the detection water tank, the cover plate on the bearing platform is opened; When the water inlet mechanism drives the supporting platform to move upward to the water surface of the detection water tank, the cover on the supporting platform is opened, so that only the sewage deposited at the bottom of the detection water tank or the oil floating on the water surface can be sucked into the supporting platform.

[0018] The present invention is provided with a sewage discharge mechanism. When the cover plate on the bearing platform is in an opened state, the sewage discharge mechanism can drive the bearing platform to rotate at the bottom of the detection water tank, so as to suck the impurities and dust at the bottom of the detection water tank into the bearing platform. In addition, the sewage discharge mechanism can also drive the supporting platform to rotate on the water surface to discharge the oil pollution floating on the water surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the detection water tank in the present invention; Figure 3 It is a structural schematic diagram of the location of the annular channel in the present invention; Figure 4 It is a schematic cross-sectional structure diagram of the detection water tank in the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure at A in the middle; Figure 6 It is a schematic diagram of the structure after the carrying platform in the present invention moves upward; Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure at B in the middle; Figure 8 It is a schematic diagram of the structure after the carrying platform in the present invention moves downward; Fig. 9 It is a structural schematic diagram of the sewage discharge mechanism in the present invention; Fig.10 For the present invention Fig. 9 Schematic diagram of the enlarged structure at point C in the middle.

[0020] In the figure: 1. detection water tank; 21. bearing platform; 22. water inlet; 23. cover plate; 31. mounting platform; 32. electric telescopic rod; 33. cross bar; 34. plug rod; 35. limit disc; 36. U-shaped tube; 37. spring one; 38. annular seat; 39. annular channel; 310. annular sealing plate; 311. L tube; 312. vertical tube; 41. gear; 42. first rack; 43. second rack; 51. internal threaded sleeve; 52. rectangular frame; 53. threaded rod; 54. positioning plate; 55. round rod; 56. round plate; 57. spring two; 58. telescopic rod two; 59. top plate; 510. bending rod; 511. block. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figures 1 to 3 As shown, the present invention provides a sealing detection device for the production of oil cylinders of agricultural machinery, comprising a detection water tank 1, wherein a bearing platform 21 for bearing the oil cylinder to be detected is arranged in the detection water tank 1, wherein the bearing platform 21 is a hollow structure inside, and water inlets 22 are provided on opposite sides, and a cover plate 23 for sealing the water inlet 22 is rotatably connected to the bearing platform 21; In the initial state, the cover plate 23 seals the water inlet 22. When the bearing platform 21 drives the oil cylinder located on its upper surface to enter the detection water tank 1 for detection, the water in the detection water tank 1 cannot enter the bearing platform 21. Furthermore, a small amount of air in the support platform 21 will not generate bubbles in the detection water tank 1 to affect the observation effect.

[0023] A water entry mechanism is provided above the detection water tank 1 for driving the supporting platform 21 to move up and down; The detection water tank 1 is provided with a linkage assembly for driving the two cover plates 23 to rotate and open the water inlet 22; The linkage component will open the cover 23 only after the supporting platform 21 moves downward to the bottom of the detection water tank 1, or after the supporting platform 21 moves upward to the water surface of the detection water tank 1, so that only the sewage deposited at the bottom of the detection water tank 1 or the oil floating on the water surface can be sucked into the supporting platform 21.

[0024] The detection water tank 1 is provided with a sewage discharge mechanism for driving the supporting platform 21 to rotate.

[0025] When the cover plate 23 on the surface of the carrier 21 is opened, the sewage discharge mechanism can drive the carrier 21 to rotate at the bottom of the detection water tank 1, and the impurities and dust at the bottom of the detection water tank 1 are sucked into the carrier 21 and discharged; And it can drive the carrier 21 to rotate on the water surface to discharge the oil floating on the water surface; At the same time, the opened cover plate 23 can guide impurities, dust and oil stains in the process of following the rotation of the supporting platform 21.

[0026] The water entry mechanism includes a mounting platform 31 sleeved on the outer wall of the detection water tank 1, an electric telescopic rod 32 is vertically fixed to the upper end of the mounting platform 31, a cross bar 33 is vertically fixed to the top of the electric telescopic rod 32, and a plug rod 34 vertically distributed therewith penetrates the free end of the cross bar 33, and the plug rod 34 is slidably connected to the cross bar 33 up and down.

[0027] The upper end of the insertion rod 34 is fixedly connected to a limiting disc 35 , the lower end of the insertion rod 34 is fixedly connected to a U-shaped tube 36 , and a spring 37 sleeved on the surface of the insertion rod 34 is fixedly connected between the U-shaped tube 36 and the cross bar 33 .

[0028] When the U-shaped tube 36 is restricted and cannot move downward, the cross bar 33 can still move downward a certain distance.

[0029] The two ends of the U-shaped tube 36 are commonly fixed with a same annular seat 38 , an annular channel 39 is rotatably connected inside the annular seat 38 , and the bearing platform 21 is fixed on the lower surface of the annular channel 39 .

[0030] By adopting the above solution, the supporting platform 21 and the annular channel 39 can move up and down following the U-shaped tube 36 without affecting the subsequent rotation of the supporting platform 21 .

[0031] An annular sealing plate 310 is rotatably connected to the upper surface of the annular channel 39 to seal it, an L-tube 311 is fixedly connected between the annular sealing plate 310 and the U-tube 36, both ends of the L-tube 311 are respectively connected to the U-tube 36 and the annular channel 39, the supporting platform 21 is connected to the annular channel 39, and a vertical tube 312 is vertically fixed on the U-tube 36 to communicate with its interior.

[0032] During use, the vertical pipe 312 can be connected to the external pump body through a hose, so that when the cover plate 23 is opened, the impurities, dust or oil in the detection water tank 1 can be discharged through the external pump body.

[0033] like Figures 4 to 7As shown, the linkage assembly includes two gears 41 located outside the carrier 21 and coaxially fixed to the two cover plates 23, respectively. A first rack 42 is fixed on the inner wall of the detection water tank 1, and a second rack 43 is located above the first rack 42; Specifically, the first rack 42 is close to the bottom of the detection water tank 1 , and the second rack 43 is close to the water surface in the detection water tank 1 , and both can mesh with the gear 41 .

[0034] like Figures 8 to 10 As shown, the sewage discharge mechanism includes an internal threaded sleeve 51 fixed on the upper surface of the supporting platform 21, a rectangular frame 52 is inserted on the cross bar 33, a threaded rod 53 is fixedly connected to the lower surface of the rectangular frame 52, the threaded rod 53 and the internal threaded sleeve 51 are adapted to each other, and two symmetrically distributed positioning plates 54 close to the bottom of the detection water tank 1 are fixedly connected to the inner wall of the detection water tank 1.

[0035] Specifically, by setting the positioning plate 54, the lowest position of the annular seat 38 can be limited, thereby limiting the lowest position of the annular channel 39 and the bearing platform 21, so that the bearing platform 21 cannot fit on the inner bottom wall of the detection water tank 1, thereby reducing the friction between the bearing platform 21 and the detection water tank 1 during rotation; However, one side of the cover plate 23 is against the bottom wall of the detection water tank 1. The cover plate 23 can shovel up the sediment on the bottom of the detection water tank 1 while rotating with the supporting platform 21, and has a guiding effect on it, so that the sediment is sucked into the supporting platform 21.

[0036] Two round rods 55 are passed through the side wall of the detection water tank 1 , and a round plate 56 is fixed on one end of the round rod 55 located outside the detection water tank 1 . A spring 57 sleeved on the round rod 55 is fixedly connected between the round plate 56 and the detection water tank 1 .

[0037] A telescopic rod 58 is fixed on the outer wall of the detection water tank 1, both ends of the telescopic rod 58 are bent, and the end away from the detection water tank 1 is fixedly connected to a top plate 59, and four bending rods 510 symmetrically distributed in pairs are fixedly connected to the lower surface of the top plate 59, and a clamping block 511 is fixedly connected between the free ends of two adjacent bending rods 510 on the left and right.

[0038] Specifically, in the initial state, the two circular plates 56 are stuck by the two blocks 511 and cannot move toward the side of the detection water tank 1 , and the round rod 55 cannot move into the detection water tank 1 . At this time, the round rod 55 will not restrict the up and down movement of the annular seat 38 .

[0039] The top plate 59 has a rectangular groove on its upper surface for the rectangular frame 52 to pass through. The block 511 is inclined near the detection water tank 1 and is inclined from top to bottom from the side near the detection water tank 1 to the side away from the detection water tank 1 .

[0040] The working principle and use process of the present invention: First, water is delivered into the detection water tank 1, and then the oil cylinder to be detected is placed on the supporting platform 21. Multiple oil cylinders can be placed on the supporting platform 21 at one time to improve the overall detection efficiency of the device; During use, try to ensure that the cylinders are evenly spaced so that if a leak does occur, it will be easy to observe; The electric telescopic rod 32 drives the cross bar 33 to move downward, and the limiting disc 35 is provided to prevent the insertion rod 34 from being separated from the cross bar 33, and the cross bar 33 can drive the insertion rod 34 and the limiting disc 35 to move downward, and the insertion rod 34 can drive the U-shaped tube 36 fixed at its lower end to move downward, and the U-shaped tube 36 can drive the annular seat 38 to move downward, and the annular seat 38 can drive the annular channel 39 to move downward, and the annular channel 39 can drive the bearing platform 21 fixed on its lower surface and connected with it to move downward, and the bearing platform 21 drives the oil cylinder located on its upper surface to be immersed in water, and the oil cylinder is tested to observe the sealing performance of the oil cylinder; When sediment is detected inside the water tank 1, the electric telescopic rod 32 is used to drive the carrier 21 to move upward, the oil cylinder that has been tested is removed, and then the carrier 21 is driven to move downward. When the gear 41 moves downward with the carrier 21, the gear 41 will mesh with the second rack 43. Restricted by the second rack 43, the gear 41 will rotate during the downward movement. The gear 41 can drive the cover plate 23 coaxially fixed thereto to rotate, thereby opening the water inlet 22 on the carrier 21. When the annular seat 38 moves downward to the upper surface of the positioning plate 54, it is restricted by the positioning plate 54 and cannot move downward any further. At the same time, the annular channel 39, the bearing platform 21 and the internal threaded sleeve 51 cannot move downward any further. At this time, one side of the cover plate 23 abuts against the bottom surface of the inner wall of the detection water tank 1. At this time, the cross bar 33 continues to move downward, so that the spring 1 37 is compressed, and at the same time, the cross bar 33 can drive the rectangular frame 52 plugged on its surface to move downward, and the rectangular frame 52 can drive the threaded rod 53 to move downward, so that the threaded rod 53 gradually enters the internal thread sleeve 51 to drive the internal thread sleeve 51 to rotate, and the internal thread sleeve 51 can drive the bearing platform 21 to rotate, and the bearing platform 21 can drive the cover plate 23 to rotate, and the cover plate 23 shovels up the impurities and dust deposited on the bottom of the detection water tank 1 during the rotation process; At the same time, the external pump body starts to suck impurities and dust into the carrier 21, and discharges them through the annular channel 39, the L-tube 311, the U-tube 36 and the vertical pipe 312, and the external hose in sequence; When the oil floating on the detection water tank 1 needs to be removed, the carrier 21 is driven to move upward, and when the gear 41 on the carrier 21 passes through the second rack 43, it will rotate, and the gear 41 can drive the cover plate 23 coaxially fixed therewith to rotate, so that the cover plate 23 is opened; Then the cross bar 33 continues to drive the bearing platform 21 to move upward, and the cross bar 33 can gradually drive the top plate 59 to move upward, and the top plate 59 can drive the block 511 to move upward through the bending rod 510, so that the block 511 is separated from the circular plate 56, and the spring 2 57 can pull the circular plate 56 to move closer to the detection water tank 1, and the circular plate 56 can drive the round rod 55 to move into the detection water tank 1, and the two round rods 55 at this time will block the annular seat 38 so that the annular seat 38 cannot move downward; The cross bar 33 can drive the rectangular frame 52 and the threaded rod 53 to continue to move downward, so that the threaded rod 53 enters the internal threaded sleeve 51, drives the internal threaded sleeve 51 to rotate, and the internal threaded sleeve 51 can drive the bearing platform 21 to rotate accordingly, and the bearing platform 21 can drive the cover plate 23 to rotate accordingly, and the cover plate 23 guides the floating oil on the water surface into the bearing platform 21 during the rotation process; The external pump body is started to suck the oil into the bearing platform 21, and then discharged through the annular channel 39, the L-tube 311, the U-tube 36 and the vertical pipe 312, and the external hose.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing detection device for the production of oil cylinders of agricultural machinery, comprising a detection water tank (1), characterized in that: The detection water tank (1) is provided with a bearing platform (21) for bearing the oil cylinder to be detected. The bearing platform (21) is hollow in structure and has water inlets (22) on two opposite sides. A cover plate (23) for sealing the water inlet (22) is rotatably connected to the bearing platform (21). A water entry mechanism for driving the supporting platform (21) to move up and down is provided above the detection water tank (1); The detection water tank (1) is provided with a linkage assembly for driving the two cover plates (23) to rotate and open the water inlet (22); The detection water tank (1) is provided with a sewage discharge mechanism for driving the bearing platform (21) to rotate.

2. The sealing detection device for the production of agricultural machinery oil cylinders according to claim 1 is characterized in that: The water entry mechanism comprises a mounting platform (31) sleeved on the outer wall of the detection water tank (1), an electric telescopic rod (32) being vertically fixed to the upper end of the mounting platform (31), a crossbar (33) being vertically fixed to the top end of the electric telescopic rod (32), a plug rod (34) being vertically distributed through the free end of the crossbar (33), and the plug rod (34) being slidably connected to the crossbar (33) in an up-and-down manner.

3. The sealing detection device for the production of oil cylinders of agricultural machinery according to claim 2 is characterized in that: The upper end of the insertion rod (34) is fixedly connected to a limiting disc (35), the lower end of the insertion rod (34) is fixedly connected to a U-shaped tube (36), and a spring (37) sleeved on the surface of the insertion rod (34) is fixedly connected between the U-shaped tube (36) and the cross bar (33).

4. The sealing detection device for the production of oil cylinders of agricultural machinery according to claim 3 is characterized in that: The two ends of the U-shaped tube (36) are commonly fixed with a same annular seat (38), an annular channel (39) is rotatably connected inside the annular seat (38), and the bearing platform (21) is fixed on the lower surface of the annular channel (39).

5. The sealing detection device for the production of oil cylinders of agricultural machinery according to claim 4 is characterized in that: An annular sealing plate (310) is rotatably connected to the upper surface of the annular channel (39) for sealing the annular channel; an L-tube (311) is fixedly connected between the annular sealing plate (310) and the U-shaped tube (36); two ends of the L-tube (311) are respectively connected to the U-shaped tube (36) and the annular channel (39); the bearing platform (21) is connected to the annular channel (39); and a vertical tube (312) is vertically fixed to the U-shaped tube (36) and is connected to the interior of the tube.

6. The seal detection device for the production of oil cylinders of agricultural machinery according to claim 5, characterized in that: The linkage assembly comprises two gears (41) located outside the support platform (21) and coaxially fixed to the two cover plates (23), respectively; a first rack (42) is fixed on the inner wall of the detection water tank (1), and a second rack (43) is located above the first rack (42).

7. The seal detection device for the production of oil cylinders of agricultural machinery according to claim 6, characterized in that: The sewage discharge mechanism comprises an internal threaded sleeve (51) fixed on the upper surface of the supporting platform (21); a rectangular frame (52) is inserted on the cross bar (33); a threaded rod (53) is fixedly connected to the lower surface of the rectangular frame (52); the threaded rod (53) and the internal threaded sleeve (51) are adapted to each other; and two symmetrically distributed positioning plates (54) close to the bottom of the detection water tank (1) are fixedly connected to the inner wall of the detection water tank (1).

8. The seal detection device for the production of oil cylinders of agricultural machinery according to claim 7, characterized in that: Two round rods (55) are passed through the side wall of the detection water tank (1); one end of the round rod (55) located outside the detection water tank (1) is fixed with a round plate (56); and a second spring (57) sleeved on the round rod (55) is fixedly connected between the round plate (56) and the detection water tank (1).

9. The seal detection device for the production of oil cylinders of agricultural machinery according to claim 8, characterized in that: A second telescopic rod (58) is fixed on the outer wall of the detection water tank (1), both ends of the second telescopic rod (58) are bent, and the end away from the detection water tank (1) is fixedly connected to a top plate (59), and four bending rods (510) symmetrically distributed in pairs are fixedly connected to the lower surface of the top plate (59), and a clamping block (511) is fixedly connected between the free ends of two adjacent bending rods (510) on the left and right.

10. The seal detection device for the production of oil cylinders of agricultural machinery according to claim 9, characterized in that: The upper surface of the top plate (59) is provided with a rectangular groove for the rectangular frame (52) to pass through, and the clamping block (511) is located in an inclined shape on the side close to the detection water tank (1), and is inclined from top to bottom from the side close to the detection water tank (1) to the side away from the detection water tank (1).

Images