Oil level measuring device for oil-immersed transformer

Abstract

The invention discloses an oil level measuring device for an oil-immersed transformer, which comprises a transformer body, the lower end of the transformer body is fixedly connected with an oil discharge port, the lower end of the oil discharge port is fixedly connected with a three-way valve, the outlet at the right end of the three-way valve is fixedly connected with an oil discharge pipe, and the outlet at the lower end of the three-way valve is provided with a filter assembly; a connecting pipe is arranged at the lower end of the filtering assembly, a telescopic part is connected to the end, away from the filtering assembly, of the connecting pipe, and a measuring assembly is arranged at the upper end of the telescopic part and used for measuring the oil level in the transformer; an adjusting assembly is arranged at the side end of the transformer body and used for adjusting the position of the measuring assembly so that the zero graduation line of the measuring assembly can be flush with the inner bottom face of an oil tank of the oil-immersed transformer. By means of the filtering assembly, the influence of sediment, other impurities and other factors on the measuring precision can be avoided, and the measuring precision of the oil level of the transformer is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and particularly to an oil level measuring device for an oil-immersed transformer. Background Art

[0002] The oil-immersed transformer is a new type of high-performance transformer with a more reasonable structure and better performance. It uses oil as the main insulation means of the transformer and relies on oil as the cooling medium, such as oil-immersed self-cooling, oil-immersed air-cooling, oil-immersed water-cooling, and forced oil circulation, etc. The main components of the oil-immersed transformer include an iron core, an oil tank, an oil conservator, an oil level gauge, etc. When measuring the oil level of the oil-immersed transformer, a measuring device is required to measure it.

[0003] For the existing oil level measuring device of the oil-immersed transformer, when in use, since it cannot filter out impurities and sediments in the oil, the impurities and sediments have a great influence on the measurement accuracy, resulting in inaccurate measurement. Therefore, it is necessary to design an oil level measuring device for an oil-immersed transformer. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose an oil level measuring device for an oil-immersed transformer.

[0005] To achieve the above purpose, the present invention adopts the following technical solution: An oil level measuring device for an oil-immersed transformer, including a transformer body, a drain port is fixedly connected to the lower end of the transformer body, a three-way valve is fixedly connected to the lower end of the drain port, a drain pipe is fixedly connected to the right end outlet of the three-way valve, a filtering component is arranged at the lower end outlet of the three-way valve, a cleaning component is arranged inside the filtering component, a connecting pipe is arranged at the lower end of the filtering component, one end of the connecting pipe far away from the filtering component is connected to a telescopic member, a measuring component is arranged at the upper end of the telescopic member, and the measuring component is used to measure the oil level inside the transformer; an adjusting component is arranged at the side end of the transformer body, and the adjusting component is used to adjust the position of the measuring component so that the zero scale line of the measuring component is flush with the inner bottom surface of the oil tank of the oil-immersed transformer.

[0006] As a further description of the above technical solution:

[0007] The filtering component includes a housing, an inlet pipe, an outlet pipe, a storage cavity, and a filter screen. The inlet pipe is fixedly connected to the lower end outlet of the three-way valve, the lower end of the inlet pipe is fixedly connected to the housing, the outlet pipe is fixedly connected inside the housing, the lower end of the outlet pipe penetrates through the housing and is fixedly connected to the connecting pipe, the filter screen is fixedly connected inside the upper end of the outlet pipe, and the space between the outlet pipe and the housing is the storage cavity.

[0008] As a further description of the above technical solution:

[0009] The cleaning component includes a fixing frame, a first rotating shaft, a first bevel gear, a second bevel gear, a second rotating shaft, a second handle and a brush. A fixing frame is fixedly connected inside the oil outlet pipe. A first rotating shaft is rotatably connected inside the fixing frame. The upper end of the first rotating shaft penetrates through the filter screen and is rotatably connected to the filter screen. A brush is fixedly connected to the upper end of the first rotating shaft, and the lower end of the brush is in contact with the filter screen. A first bevel gear is fixedly connected to the lower end of the first rotating shaft. A second rotating shaft is rotatably connected inside the oil outlet pipe. The second rotating shaft penetrates through the housing and is rotatably connected to the housing. A second handle is fixedly connected to one end of the second rotating shaft, and a second bevel gear is fixedly connected to the other end of the second rotating shaft. The second bevel gear meshes with the first bevel gear.

[0010] As a further description of the above technical solution:

[0011] A discharge pipe is fixedly connected to the right side of the housing, and a valve is installed on the discharge pipe.

[0012] As a further description of the above technical solution:

[0013] The telescopic member includes an inner cylinder and an outer cylinder. One end of the connecting pipe away from the oil outlet pipe is fixedly connected to the inner cylinder, and the outer cylinder is slidably connected to the circumferential surface of the inner cylinder.

[0014] As a further description of the above technical solution:

[0015] The lower end of the transformer body is fixedly connected to a mounting frame, and the two ends inside the mounting frame are fixedly connected to the housing and the inner cylinder respectively.

[0016] As a further description of the above technical solution:

[0017] The adjusting component includes a support frame, a threaded rod, a moving block, a slide rail, an L-shaped plate and a first handle. A support frame is fixedly connected to the side end of the transformer body. A threaded rod is rotatably connected inside the support frame. A first handle is fixedly connected to the upper end of the threaded rod. A moving block is threadedly connected to the circumferential surface of the threaded rod. An L-shaped plate is fixedly connected to the end of the moving block away from the support frame. A slide rail is fixedly connected inside the support frame, and the slide rail is slidably connected to the moving block.

[0018] As a further description of the above technical solution:

[0019] The measuring component includes a measuring cylinder, an observation window, a baffle, a nut and a floating ball. A measuring cylinder is arranged inside the L-shaped plate. An observation window is arranged on the vertical surface of the measuring cylinder. Scale lines are arranged on the vertical surface of the measuring cylinder, and the scale lines are distributed on both sides of the observation window. A floating ball is arranged inside the measuring cylinder. A baffle is fixedly connected to the circumferential surface of the measuring cylinder, and a nut is threadedly connected to the circumferential surface of the measuring cylinder.

[0020] As a further description of the above technical solution:

[0021] A U-shaped hole is provided on the upper end surface of the L-shaped plate, and the lower end of the measuring cylinder is located inside the U-shaped hole.

[0022] As a further description of the above technical solution:

[0023] A positioning seat is fixedly connected to the left side of the L-shaped plate, a positioning block is inserted inside the positioning seat, and a fixed connection is provided between the positioning block and the measuring cylinder.

[0024] The present invention has the following beneficial effects:

[0025] 1. Compared with the prior art, for this oil-immersed transformer oil level measuring device, by setting a filtering component, a connecting pipe and a telescopic member, during use, the filtering component is connected to the oil discharge port of the transformer body by using a three-way valve, and then with the cooperation of the connecting pipe and the telescopic rod, the transformer is communicated with the measuring component. At this time, the transformer oil inside the transformer will enter the filtering component along the three-way valve. With the cooperation of the filtering component, the filtering of the transformer oil is realized. The filtered transformer oil will enter the measuring component along the connecting pipe and the telescopic member, thus realizing the measurement of the oil level of the transformer oil. At the same time, with the cooperation of the filtering component, the influence of sediment and other impurities on the measurement accuracy can be avoided, and the measurement accuracy is improved.

[0026] 2. Compared with the prior art, for this oil-immersed transformer oil level measuring device, by setting a support frame, a threaded rod, a moving block, a slide rail, an L-shaped plate and a first handle, during use, rotate the first handle, and at this time, with the cooperation of the threaded rod, the moving block can be driven to slide on the slide rail, thereby driving the L-shaped plate to move. As the L-shaped plate moves, the height of the measuring component can be changed at this time, so that the zero scale line of the measuring component is flush with the inner bottom surface of the oil tank of the oil-immersed transformer, thus facilitating the calculation of the height of the oil level inside the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of the whole of the present invention from the first perspective;

[0028] Figure 2 is a schematic structural diagram of the whole of the present invention from the second perspective;

[0029] Figure 3 is of the present invention Figure 2 an enlarged view of part A;

[0030] Figure 4 is a schematic structural diagram of the filtering component of the present invention;

[0031] Figure 5 is a schematic structural diagram inside the filtering component of the present invention;

[0032] Figure 6 For the present invention Figure 5 Enlarged view of part B in the present invention;

[0033] Figure 7 Schematic structural diagram inside the measuring component of the present invention;

[0034] Figure 8 Schematic structural diagram of the adjusting component of the present invention.

[0035] Legend description:

[0036] 1. Transformer body; 2. Oil drain port; 3. Three-way valve; 4. Drain pipe; 5. Filter component; 501. Housing; 502. Inlet pipe; 503. Outlet pipe; 504. Storage cavity; 505. Filter net; 6. Connecting pipe; 7. Mounting bracket; 8. Telescopic member; 801. Inner cylinder; 802. Outer cylinder; 9. Measuring component; 901. Measuring cylinder; 902. Observation window; 903. Baffle; 904. Nut; 905. Floating ball; 10. Adjusting component; 1001. Support frame; 1002. Threaded rod; 1003. Moving block; 1004. Slide rail; 1005. L-shaped plate; 1006. First handle; 11. U-shaped hole; 12. Cleaning component; 1201. Fixed frame; 1202. First rotating shaft; 1203. First bevel gear; 1204. Second bevel gear; 1205. Second rotating shaft; 1206. Second handle; 1207. Brush; 13. Valve; 14. Discharge pipe; 15. Positioning seat; 16. Positioning block. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] Refer to Figure 1-8, an oil level measuring device for an oil-immersed transformer provided by the present invention includes a transformer body 1. A drain port 2 is fixedly connected to the lower end of the transformer body 1. A three-way valve 3 is fixedly connected to the lower end of the drain port 2. A drain pipe 4 is fixedly connected to the right end outlet of the three-way valve 3. A filtering assembly 5 is provided at the lower end outlet of the three-way valve 3. A cleaning assembly 12 is arranged inside the filtering assembly 5. A connecting pipe 6 is provided at the lower end of the filtering assembly 5. One end of the connecting pipe 6 away from the filtering assembly 5 is connected to a telescopic member 8. A measuring assembly 9 is provided at the upper end of the telescopic member 8. The measuring assembly 9 is used to measure the oil level inside the transformer; an adjusting assembly 10 is provided on the side end of the transformer body 1. The adjusting assembly 10 is used to adjust the position of the measuring assembly 9 so that the zero scale line of the measuring assembly 9 is flush with the inner bottom surface of the oil tank of the oil-immersed transformer.

[0039] During use, first use the adjusting assembly 10 to adjust the position of the measuring assembly 9 so that the zero scale line of the measuring assembly 9 is flush with the inner bottom surface of the oil tank of the oil-immersed transformer. After adjustment, use the three-way valve 3 for oil drainage or measurement work. When performing oil drainage work, the oil inside the transformer is discharged outward through the drain pipe 4. When performing measurement work, the transformer oil inside the transformer will enter the filtering assembly 5 along the three-way valve 3. With the cooperation of the filtering assembly 5, the transformer oil is filtered. The filtered transformer oil will enter the measuring assembly 9 along the connecting pipe 6 and the telescopic member 8, thus realizing the measurement of the oil level of the transformer oil. At the same time, with the cooperation of the filtering assembly 5, the measurement accuracy can be avoided from being affected by factors such as sediments and other impurities, improving the measurement accuracy; when it is necessary to clean the filtering assembly 5, the cleaning assembly 12 works, and at this time, the filtering assembly 5 can be cleaned, which is beneficial to better measure the oil level of the transformer.

[0040] The filtering component 5 includes a housing 501, an oil inlet pipe 502, an oil outlet pipe 503, a storage chamber 504, and a filter screen 505. The lower outlet of the three-way valve 3 is fixedly connected to the oil inlet pipe 502. The lower end of the oil inlet pipe 502 is fixedly connected to the housing 501. The oil outlet pipe 503 is fixedly connected inside the housing 501. The lower end of the oil outlet pipe 503 penetrates through the housing 501 and is fixedly connected to the connecting pipe 6. The filter screen 505 is fixedly connected inside the upper end of the oil outlet pipe 503. The space between the oil outlet pipe 503 and the housing 501 is the storage chamber 504. During operation, the transformer oil enters the interior of the oil inlet pipe 502 through the three-way valve 3, and then enters the interior of the housing 501 along the oil inlet pipe 502. Since the height of the oil outlet pipe 503 inside the housing 501 is higher than the bottom of the housing 501, the transformer oil will first fill the storage chamber 504 and then overflow into the interior of the oil outlet pipe 503. At this time, with the cooperation of the filter screen 505, the overflowing transformer oil can be filtered, thus avoiding the influence of factors such as sediment and other impurities on the measurement accuracy; at the same time, the function of the storage chamber 504 can store the sediment and impurities, which is beneficial to extending the service life of the filtering component 5.

[0041] The cleaning component 12 includes a fixing frame 1201, a first rotating shaft 1202, a first bevel gear 1203, a second bevel gear 1204, a second rotating shaft 1205, a second handle 1206, and a brush 1207. The fixing frame 1201 is fixedly connected inside the oil outlet pipe 503. The first rotating shaft 1202 is rotatably connected inside the fixing frame 1201. The upper end of the first rotating shaft 1202 penetrates through the filter screen 505 and is rotatably connected to the filter screen 505. The brush 1207 is fixedly connected to the upper end of the first rotating shaft 1202. The lower end of the brush 1207 is in contact with the filter screen 505. The first bevel gear 1203 is fixedly connected to the lower end of the first rotating shaft 1202. The second rotating shaft 1205 is rotatably connected inside the oil outlet pipe 503. The second rotating shaft 1205 penetrates through the housing 501 and is rotatably connected to the housing 501. One end of the second rotating shaft 1205 is fixedly connected to the second handle 1206. The other end of the second rotating shaft 1205 is fixedly connected to the second bevel gear 1204. The second bevel gear 1204 meshes with the first bevel gear 1203. During operation, when the second handle 1206 is rotated, the second bevel gear 1204 can be driven to rotate under the action of the second rotating shaft 1205, and then the first rotating shaft 1202 can be driven to rotate under the cooperation of the first bevel gear 1203. At this time, the brush 1207 can be driven to rotate. As the brush 1207 rotates, the filter screen 505 can be cleaned, which is beneficial to better measuring the oil level of the transformer.

[0042] A discharge pipe 14 is fixedly connected to the right side of the housing 501. A valve 13 is installed on the discharge pipe 14. During operation, when the valve 13 is opened, the sediment and impurities will be discharged out along the discharge pipe 14.

[0043] The telescopic member 8 includes an inner cylinder 801 and an outer cylinder 802. One end of the connecting pipe 6 far from the oil outlet pipe 503 is fixedly connected to the inner cylinder 801. The outer cylinder 802 is slidably connected to the circumferential surface of the inner cylinder 801. During operation, by providing the inner cylinder 801 and the outer cylinder 802, it is convenient for the measuring assembly 9 to move up and down at this time.

[0044] The lower end of the transformer body 1 is fixedly connected to the mounting frame 7. The two ends of the mounting frame 7 are fixedly connected to the housing 501 and the inner cylinder 801 respectively. During operation, by providing the mounting frame 7, the stability of the installation of the inner cylinder 801 and the housing 501 can be improved under the action of the mounting frame 7.

[0045] The adjusting assembly 10 includes a support frame 1001, a threaded rod 1002, a moving block 1003, a slide rail 1004, an L-shaped plate 1005 and a first handle 1006. The support frame 1001 is fixedly connected to the side end of the transformer body 1. The threaded rod 1002 is rotatably connected to the inside of the support frame 1001. The upper end of the threaded rod 1002 is fixedly connected to the first handle 1006. The moving block 1003 is threadedly connected to the circumferential surface of the threaded rod 1002. One end of the moving block 1003 far from the support frame 1001 is fixedly connected to the L-shaped plate 1005. The slide rail 1004 is fixedly connected to the inside of the support frame 1001. The slide rail 1004 is slidably connected to the moving block 1003. When in use, rotate the first handle 1006. At this time, the moving block 1003 can be driven to slide on the slide rail 1004 under the cooperation of the threaded rod 1002, and then drive the L-shaped plate 1005 to move. As the L-shaped plate 1005 moves, the height of the measuring assembly 9 can be changed at this time, so that the zero scale line of the measuring assembly 9 is flush with the inner bottom surface of the oil tank of the oil-immersed transformer, which is convenient for calculating the height of the oil level inside the transformer.

[0046] The measuring assembly 9 includes a measuring cylinder 901, an observation window 902, a baffle 903, a nut 904 and a floating ball 905. The measuring cylinder 901 is arranged inside the L-shaped plate 1005. The observation window 902 is arranged on the vertical surface of the measuring cylinder 901. Scale lines are arranged on the vertical surface of the measuring cylinder 901 and are distributed on both sides of the observation window 902. The floating ball 905 is arranged inside the measuring cylinder 901. The baffle 903 is fixedly connected to the circumferential surface of the measuring cylinder 901. The nut 904 is threadedly connected to the circumferential surface of the measuring cylinder 901. During operation, tighten the nut 904, and the measuring cylinder 901 can be fixed on the L-shaped plate 1005 under the cooperation of the baffle 903. After installation, the transformer oil will enter the measuring cylinder 901 along the telescopic member 8, and then push the floating ball 905 to move inside the measuring cylinder 901. Then, it is convenient to observe the height where the floating ball 905 stops under the action of the observation window 902, so that the height of the transformer oil level can be calculated.

[0047] The upper end surface of the L-shaped plate 1005 is provided with a U-shaped hole 11, and the lower end of the measuring cylinder 901 is located inside the U-shaped hole 11. During operation, by providing the U-shaped hole 11, the measuring cylinder 901 can be conveniently installed on the L-shaped plate 1005 under the action of the U-shaped hole 11.

[0048] A positioning seat 15 is fixedly connected to the left side of the L-shaped plate 1005. A positioning block 16 is inserted into the positioning seat 15, and a fixed connection is provided between the positioning block 16 and the measuring cylinder 901. During operation, by providing the positioning seat 15 and the positioning block 16, the limitation of the measuring cylinder 901 can be achieved at this time, so that the measuring cylinder 901 can be stably installed on the L-shaped plate 1005.

[0049] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil level measuring device for an oil-immersed transformer, comprising a transformer body (1), characterized in that: The lower end of the transformer body (1) is fixedly connected to an oil drain port (2), the lower end of the oil drain port (2) is fixedly connected to a three-way valve (3), the right end outlet of the three-way valve (3) is fixedly connected to an oil drain pipe (4), the lower end outlet of the three-way valve (3) is provided with a filter assembly (5), a cleaning assembly (12) is provided inside the filter assembly (5), a connecting pipe (6) is provided at the lower end of the filter assembly (5), an end of the connecting pipe (6) away from the filter assembly (5) is connected to a telescopic member (8), the upper end of the telescopic member (8) is provided with a measuring assembly (9), the measuring assembly (9) is used to measure the oil level inside the transformer; the side end of the transformer body (1) is provided with an adjusting assembly (10), the adjusting assembly (10) is used to adjust the position of the measuring assembly (9) so that the zero scale line of the measuring assembly (9) is flush with the inner bottom surface of the oil tank of the oil-immersed transformer.

2. The oil level measuring device for an oil-immersed transformer according to claim 1, characterized in that: The filter assembly (5) comprises a housing (501), an oil inlet pipe (502), an oil outlet pipe (503), a storage chamber (504) and a filter screen (505); the outlet at the lower end of the three-way valve (3) is fixedly connected to the oil inlet pipe (502); the lower end of the oil inlet pipe (502) is fixedly connected to the housing (501); the inside of the housing (501) is fixedly connected to the oil outlet pipe (503); the lower end of the oil outlet pipe (503) passes through the housing (501) and is fixedly connected to the connecting pipe (6); the upper end of the oil outlet pipe (503) is fixedly connected to the inside of the filter screen (505); and the space between the oil outlet pipe (503) and the housing (501) is the storage chamber (504).

3. The oil level measuring device for an oil-immersed transformer according to claim 2, characterized in that: The cleaning assembly (12) comprises a fixed frame (1201), a first rotating shaft (1202), a first bevel gear (1203), a second bevel gear (1204), a second rotating shaft (1205), a second handle (1206) and a brush (1207); the oil outlet pipe (503) is fixedly connected to the fixed frame (1201); the fixed frame (1201) is rotatably connected to the first rotating shaft (1202); the upper end of the first rotating shaft (1202) passes through the filter screen (505) and is rotatably connected to the filter screen (505); the upper end of the first rotating shaft (1202) is fixedly connected to the brush (1207); ), the lower end of the brush (1207) is fitted with the filter (505); the lower end of the first rotating shaft (1202) is fixedly connected to the first bevel gear (1203); the oil outlet pipe (503) is internally rotatably connected to the second rotating shaft (1205), the second rotating shaft (1205) passes through the shell (501) and is rotatably connected to the shell (501), one end of the second rotating shaft (1205) is fixedly connected to the second handle (1206), the other end of the second rotating shaft (1205) is fixedly connected to the second bevel gear (1204), and the second bevel gear (1204) is meshed with the first bevel gear (1203).

4. The oil level measuring device for an oil-immersed transformer according to claim 2, characterized in that: A discharge pipe (14) is fixedly connected to the right side of the housing (501), and a valve (13) is installed on the discharge pipe (14).

5. The oil level measuring device for an oil-immersed transformer according to claim 2, characterized in that: The telescopic member (8) comprises an inner cylinder (801) and an outer cylinder (802); one end of the connecting pipe (6) away from the oil outlet pipe (503) is fixedly connected to the inner cylinder (801); and the circumferential surface of the inner cylinder (801) is slidably connected to the outer cylinder (802).

6. The oil level measuring device for an oil-immersed transformer according to claim 5, characterized in that: The lower end of the transformer body (1) is fixedly connected to a mounting frame (7), and the interiors of both ends of the mounting frame (7) are respectively fixedly connected to the shell (501) and the inner cylinder (801).

7. The oil level measuring device for an oil-immersed transformer according to claim 5, characterized in that: The adjustment component (10) comprises a support frame (1001), a threaded rod (1002), a moving block (1003), a slide rail (1004), an L-shaped plate (1005) and a first handle (1006); the side end of the transformer body (1) is fixedly connected to the support frame (1001); the support frame (1001) is rotatably connected to the threaded rod (1002); the upper end of the threaded rod (1002) is fixedly connected to the first handle (1006); the circumferential surface of the threaded rod (1002) is threadedly connected to the moving block (1003); one end of the moving block (1003) away from the support frame (1001) is fixedly connected to the L-shaped plate (1005); the support frame (1001) is fixedly connected to the slide rail (1004); the slide rail (1004) and the moving block (1003) are slidably connected.

8. The oil level measuring device for an oil-immersed transformer according to claim 7, characterized in that: The measuring assembly (9) comprises a measuring cylinder (901), an observation window (902), a baffle (903), a nut (904) and a floating ball (905); the measuring cylinder (901) is arranged inside the L-shaped plate (1005); the observation window (902) is arranged on the vertical surface of the measuring cylinder (901); scale lines are arranged on the vertical surface of the measuring cylinder (901); the scale lines are distributed on both sides of the observation window (902); the floating ball (905) is arranged inside the measuring cylinder (901); the baffle (903) is fixedly connected to the circumferential surface of the measuring cylinder (901); and the nut (904) is threadedly connected to the circumferential surface of the measuring cylinder (901).

9. The oil level measuring device for an oil-immersed transformer according to claim 8, characterized in that: The upper end surface of the L-shaped plate (1005) is provided with a U-shaped hole (11), and the lower end of the measuring tube (901) is located inside the U-shaped hole (11).

10. The oil level measuring device for an oil-immersed transformer according to claim 8, characterized in that: A positioning seat (15) is fixedly connected to the left side of the L-shaped plate (1005), a positioning block (16) is inserted into the interior of the positioning seat (15), and the positioning block (16) is fixedly connected to the measuring cylinder (901).

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