Magnet exciting coil forming device for large-diameter electromagnetic flowmeter

Abstract

The utility model discloses a large-caliber electromagnetic flowmeter excitation coil forming device, which relates to the technical field of forming devices and comprises a support frame, the support frame comprises an air cylinder mounting plate and a support block mounting plate positioned at the top of the air cylinder mounting plate, and the top of the support block mounting plate is connected with a coil support block. The bottom of the air cylinder mounting plate is connected with a forming air cylinder, the output end of the forming air cylinder is connected with a pressing arm, the top of the pressing arm is connected with a pulling shaft, the top of the pulling shaft is connected with a fixing buckle, and the top of the fixing buckle is connected with a wire pulling belt. According to the forming device for the excitation coil of the large-diameter electromagnetic flowmeter, forming production of the excitation coil can be rapidly carried out, the formed excitation coil is consistent in shape, labor intensity is relieved, meanwhile, the arc face of the coil supporting block makes elastic contact with the stay wire belt, the situation that the excitation coil is damaged rigidly can be avoided, and safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of forming devices, and more specifically to a forming device for an excitation coil of a large-caliber electromagnetic flowmeter. Background Art

[0002] An electromagnetic flowmeter is an instrument that measures the flow rate of conductive fluids (such as water, sewage, and corrosive liquids) based on Faraday's law of electromagnetic induction. Its operating principle is that when a conductive fluid passes through a magnetic field, it cuts through the magnetic lines of force, generating an electromotive force proportional to the flow rate. This electromotive force can be detected by electrodes and converted into a flow signal. To generate this necessary magnetic field, an excitation coil is used in the electromagnetic flowmeter. The preparation process of the excitation coil affects the measurement accuracy and anti-interference ability of the electromagnetic flowmeter. The excitation coil of the electromagnetic flowmeter must have an arc shape after forming that matches the outer diameter of the measuring tube to facilitate installation. Furthermore, the outer dimensions of the coils in the same group must be consistent to maintain product consistency.

[0003] Large-diameter coils are suitable for large-diameter electromagnetic flowmeters. Large-diameter coils are usually produced using enameled wire and manually pressed into shape using a mold. The following problems also exist during production:

[0004] It is not easy to control the forming force during the manual bending process, which will result in uneven coil curvature and damage to the coil surface caused by the rigid contact between multiple straight edges and the mold. At the same time, springback is prone to occur, making it impossible to form the coil in one go and requiring further adjustment.

[0005] Therefore, it is necessary to propose a large-caliber electromagnetic flowmeter excitation coil forming device to solve the above problems. Utility Model Content

[0006] In response to the above problems, the utility model provides a large-caliber electromagnetic flowmeter excitation coil forming device, which has the function of quickly disassembling and assembling the excitation coil, and at the same time has strong reliability, high appearance consistency after forming, and reduces damage to the coil caused by rigid contact.

[0007] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0008] A large-caliber electromagnetic flowmeter excitation coil forming device includes a support frame, the support frame includes a cylinder mounting plate and a bracket mounting plate located on the top of the cylinder mounting plate, the top of the bracket mounting plate is connected to the coil bracket, the bottom of the cylinder mounting plate is connected to the forming cylinder, the output end of the forming cylinder is connected to a pressure arm, the top of the pressure arm is connected to a pulling shaft, the top of the pulling shaft is connected to a fixing buckle, the top of the fixing buckle is connected to a pull wire belt, and the pull wire belt is used to fix the excitation coil;

[0009] The two ends of the coil support block are internally slidably connected with a guide shaft, the top of the guide shaft is connected to the coil ejection block, the bottom of the guide shaft is connected to a slider bolt, a spring is connected between the slider bolt and the coil support block, the top of the slider cylinder is connected to an ejection slider mounting plate, the top of the ejection slider mounting plate is connected to a coil ejection slider, and inclined surfaces are provided on both sides of the top of the coil ejection slider, and the bottom of the slider bolt slides in the inclined surfaces.

[0010] Preferably, the top of the pulling shaft is threadedly connected with a second nut, and the fixing buckle is fixed to the top of the pulling shaft through the second nut.

[0011] Preferably, the top of the fixing buckle is rotatably connected to a drawstring fixing shaft, one end of the drawstring fixing shaft is connected to a third nut, one end of the drawstring is connected to the drawstring fixing shaft, and the other end is connected to a movable shaft, and a fixing groove for inserting the movable shaft is provided on the fixing buckle.

[0012] Preferably, both sides of the coil support block are connected with coil front and rear limiters, the excitation coil is placed between two adjacent coil front and rear limiters, and both ends of the upper surface of the support block mounting plate are connected with coil left and right limiters.

[0013] Preferably, the support frame also includes a base plate support plate, the top of the base plate support plate is connected to the base plate column and the mounting plate column, the top of the mounting plate column is connected to the first nut, the cylinder mounting plate is installed on the top of the mounting plate column through the first nut, the base plate column passes through the cylinder mounting plate, and is connected to the top support block mounting plate.

[0014] Preferably, a linear bearing is connected to the bottom of the cylinder mounting plate, and the pulling shaft is slidably connected to the linear bearing.

[0015] Preferably, a hole slot is provided on the top of the support block mounting plate for the fixing buckle to pass through, the left and right limiters of the coil are located on one side of the hole slot, and the other side of the hole slot is connected to the coil forming limiter.

[0016] Preferably, a groove for accommodating the coil ejecting block is provided on the coil supporting block, and the bottom of the coil ejecting block is arc-shaped.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This device can quickly form and produce the excitation coil through the coordinated setting of the wire drawing belts and coil support blocks at both ends, and the shape of the excitation coil after forming is consistent, avoiding the situation where it is inconvenient to control the pressure when manually using the mold to extrude, resulting in inconsistent products after forming, and also reducing labor intensity. At the same time, the curved surface of the coil support block and the elastic contact of the wire drawing belt can avoid hard damage to the excitation coil, and has high safety.

[0019] 2. This device sets a coil ejection block on the coil support block. When the coil ejection block is extended, it can play a secondary molding role on the excitation coil, so that the excitation coil can be formed in one time, which improves the molding efficiency and avoids the rebound of the excitation coil after forming, which requires adjustment.

[0020] 3. This device provides a detachable pull-cord component on the fixing buckle. After opening one end of the pull-cord, the excitation coil can be quickly installed and removed, which improves the efficiency of assembly and disassembly. At the same time, the pull-cord made of flexible material can adapt to pulling excitation coils of different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the coil ejection slider and coil support block structure in the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the fixing buckle and the pull cord in the present invention;

[0024] Figure 4 This is a schematic diagram of placing the excitation coil in the present invention;

[0025] Figure 5 This is a schematic diagram of the excitation coil after forming in the utility model.

[0026] Reference numerals:

[0027] 1. Coil forming limiter; 2. Coil ejector block; 3. Coil support block; 4. Coil ejector slider; 5. Slider bolt; 6. Coil front and rear limiters; 7. Spring; 8. Guide shaft; 9. Wire drawstring; 10. Movable shaft; 11. Fixing buckle; 12. Ejector slider mounting plate; 13. First nut; 14. Linear bearing; 15. Pulling shaft; 16. Pressing arm; 17. Bottom plate column; 18. Bottom plate support plate; 19. Mounting plate column; 20. Forming cylinder; 21. Slider cylinder; 22. Cylinder mounting plate; 23. Second nut; 24. Coil left and right limiters; 25. Support block mounting plate; 26. Third nut; 27. Wire drawstring fixing shaft. DETAILED DESCRIPTION

[0028] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1-5 A large-caliber electromagnetic flowmeter excitation coil forming device includes a support frame, which includes a cylinder mounting plate 22 and a support block mounting plate 25 located on the top of the cylinder mounting plate 22. The cylinder mounting plate 22 is used to fix the forming cylinder 20 and the slider cylinder 21. The top of the support block mounting plate 25 is connected to the coil support block 3. The top of the coil support block 3 is in an arc shape, which is the same as the arc of the excitation coil to be formed. When the two ends of the excitation coil move downward, they will press on the top of the coil support block 3, thereby causing deformation. The bottom of the cylinder mounting plate 22 is connected to the forming cylinder 20. The output end of the forming cylinder 20 is connected to a pressure arm 16, which is fixed to the output end of the forming cylinder 20. Both ends drive the pulling shaft 15 to move. The top of the pressure arm 16 is connected to the pulling shaft 15. The top of the pulling shaft 15 is connected to a fixing buckle 11. The top of the fixing buckle 11 is connected to a pull wire belt 9. One end of the pull wire belt 9 is movably connected to the fixing buckle 11, and the other end is installed on the fixing buckle 11 through a movable shaft 10. It is used to fix the two ends of the excitation coil, thereby driving the two ends to move downward. The pull wire belt 9 is used to fix the excitation coil.

[0030] When the excitation coil is formed, the excitation coil will rebound. The following is a structure that can avoid rebound: Figure 2 , the two ends of the coil support block 3 are internally slidably connected with a guide shaft 8, the guide shaft 8 passes through the coil support block 3, and is connected to a slider bolt 5 at the bottom. The top of the guide shaft 8 is connected to the coil ejection block 2, and the bottom of the guide shaft 8 is connected to the slider bolt 5. A spring 7 is connected between the slider bolt 5 and the coil support block 3. The top of the coil support block 3 is also provided with a groove for accommodating the coil ejection block 2. When the slider cylinder 21 is not in action, the spring 7 will drive the coil ejection block 2 to be located in the groove through the guide shaft 8. The top of the slider cylinder 21 is connected to the top The top of the ejector slider mounting plate 12 is connected to the coil ejector slider 4. Inclined surfaces are provided on both sides of the top of the coil ejector slider 4. The bottom of the slider bolt 5 slides in the inclined surfaces. When the coil ejector slider 4 moves upward, the slider bolt 5 will make sliding contact with the inclined surfaces on both sides of the coil ejector slider 4, thereby extending the coil ejection block 2 outward through the guide shaft 8. The extended coil ejection block 2 will produce an extrusion effect on the excitation coil, causing it to produce secondary deformation, thereby avoiding the rebound of the excitation coil.

[0031] Specifically, refer to Figure 3 The top of the pulling shaft 15 is threadedly connected with a second nut 23, and the second nut 23 makes it easy to remove the fixing buckle 11, and the fixing buckle 11 is fixed to the top of the pulling shaft 15 through the second nut 23.

[0032] When in use, the fixed pull cord 9 is not convenient for disassembling the excitation coil. The following provides a structure that is convenient for opening the pull cord 9 to install the excitation coil: Figure 3 Specifically, the top of the fixing buckle 11 is rotatably connected to a drawstring fixing shaft 27, and one end of the drawstring fixing shaft 27 is connected to a third nut 26. The pulling shaft 15 is fixed to the fixing buckle 11 through the third nut 26, which is convenient for replacing the corresponding drawstring 9 according to the diameter of the excitation coil produced, and can adapt to different types of excitation coils. One end of the drawstring 9 is connected to the drawstring fixing shaft 27. The drawstring 9 is made of nylon to prevent rigid contact with the coil from causing damage to the surface of the coil enameled wire. The other end is connected to a movable shaft 10. A fixing groove for inserting the movable shaft 10 is opened on the fixing buckle 11. The end of the drawstring 9 with the movable shaft 10 is passed through the excitation coil and inserted into the fixing groove. At this time, the installation of the excitation coil is completed.

[0033] During installation, the excitation coil may be easily offset due to the lack of a limiting structure. The following provides a structure for limiting the excitation coil: Figure 1 Specifically, the two sides of the coil support block 3 are connected with the coil front and rear limiters 6, and the excitation coil is placed between the two adjacent coil front and rear limiters 6. The coil front and rear limiters 6 and the coil left and right limiters 24 limit the excitation coil to prevent the excitation coil from being offset when placed. At the same time, they also have a guiding role during molding. The upper surface of the support block mounting plate 25 is connected to the coil left and right limiters 24 at both ends.

[0034] The following provides the bottom structure of the support frame to improve the stability of the excitation coil during molding: Figure 1 Specifically, the support frame also includes a base plate support plate 18, the top of the base plate support plate 18 is connected to the base plate column 17 and the mounting plate column 19, the top of the mounting plate column 19 is connected to the first nut 13, the base plate column 17, the base plate support plate 18, the mounting plate column 19, the cylinder mounting plate 22 and the bracket mounting plate 25 are connected and fixed by the first nut 13. In another embodiment, welding can be used for connection. The cylinder mounting plate 22 is installed on the top of the mounting plate column 19 through the first nut 13. The base plate column 17 passes through the cylinder mounting plate 22 and is connected to the bracket mounting plate 25 at the top.

[0035] When the pulling shaft 15 moves up and down, it is easy to shake. The following provides a structure to improve the stability of the pulling shaft 15 when moving: Figure 1Specifically, a linear bearing 14 is connected to the bottom of the cylinder mounting plate 22 , and the pulling shaft 15 is installed inside the linear bearing 14 , and the pulling shaft 15 is slidably connected to the linear bearing 14 .

[0036] When the pull wire 9 drives the two ends of the excitation coil to move downward, excessive deformation may occur. The following structure is provided to prevent excessive deformation: Figure 1 Specifically, a hole slot is opened on the top of the support block mounting plate 25 for the fixing buckle 11 to pass through. The fixing buckle 11 can move up and down in the hole slot. The left and right coil limits 24 are located on one side of the hole slot, and the other side of the hole slot is connected to the coil forming limit 1. When the pull wire belt 9 drives the two ends of the excitation coil to move downward, the excitation coil will come into contact with the coil forming limit 1, thereby preventing excessive deformation of the excitation coil.

[0037] Specifically, refer to Figure 2 The coil support block 3 is provided with a groove for accommodating the coil ejecting block 2. The groove is used to receive the coil ejecting block 2 to facilitate the installation of the excitation coil. The bottom of the coil ejecting block 2 is arc-shaped.

[0038] In this embodiment, when in use, the excitation coil is in a horizontal state before being formed. The excitation coil is placed in the annular groove formed by the front and rear limiters 6 and the left and right limiters 24 of the coil. One end of the pull wire 9 passes through the excitation coil and is placed in the fixed groove through the movable shaft 10. Figure 4 At this time, the installation of both ends of the excitation coil is completed, and then the forming cylinder 20 and the slider cylinder 21 are started. The output end of the forming cylinder 20 drives the wire belt 9 to move downward through the pulling shaft 15, and the wire belt 9 drives the two ends of the excitation coil to move downward, causing the excitation coil to deform. When the output end of the slider cylinder 21 moves upward, it pushes the coil ejection block 2 to extend from the coil support block 3, thereby squeezing the excitation coil and causing it to produce secondary deformation. Figure 5 To prevent the excitation coil from rebounding after forming, reset the forming cylinder 20 and the slider cylinder 21 after forming, and remove the excitation coil.

[0039] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A large-caliber electromagnetic flowmeter excitation coil forming device, characterized by: The invention comprises a support frame, wherein the support frame comprises a cylinder mounting plate (22) and a support block mounting plate (25) located on the top of the cylinder mounting plate (22); a slider cylinder (21) is mounted on the top of the cylinder mounting plate (22); a coil support block (3) is connected to the top of the support block mounting plate (25); a forming cylinder (20) is connected to the bottom of the cylinder mounting plate (22); an output end of the forming cylinder (20) is connected to a pressing arm (16); a top of the pressing arm (16) is connected to a pulling shaft (15); a top of the pulling shaft (15) is connected to a fixing buckle (11); a top of the fixing buckle (11) is connected to a pull wire belt (9); and the pull wire belt (9) is used to fix the excitation coil; The two ends of the coil support block (3) are internally slidably connected with a guide shaft (8), the top of the guide shaft (8) is connected to the coil ejection block (2), the bottom of the guide shaft (8) is connected to a slider bolt (5), a spring (7) is connected between the slider bolt (5) and the coil support block (3), the top of the slider cylinder (21) is connected to an ejection slider mounting plate (12), the top of the ejection slider mounting plate (12) is connected to a coil ejection slider (4), and inclined surfaces are provided on both sides of the top of the coil ejection slider (4), and the bottom of the slider bolt (5) slides in the inclined surfaces.

2. The large-caliber electromagnetic flowmeter excitation coil forming device according to claim 1, characterized in that: The top of the pulling shaft (15) is threadedly connected with a second nut (23), and the fixing buckle (11) is fixed to the top of the pulling shaft (15) through the second nut (23).

3. The large-caliber electromagnetic flowmeter excitation coil forming device according to claim 1, characterized in that: The top of the fixing buckle (11) is rotatably connected to a drawstring fixing shaft (27), one end of the drawstring fixing shaft (27) is connected to a third nut (26), one end of the drawstring (9) is connected to the drawstring fixing shaft (27), and the other end is connected to a movable shaft (10), and a fixing groove for inserting the movable shaft (10) is provided on the fixing buckle (11).

4. The large-caliber electromagnetic flowmeter excitation coil forming device according to claim 1, characterized in that: Both sides of the coil support block (3) are connected to coil front and rear limiters (6), the excitation coil is placed between two adjacent coil front and rear limiters (6), and both ends of the upper surface of the support block mounting plate (25) are connected to coil left and right limiters (24).

5. The large-caliber electromagnetic flowmeter excitation coil forming device according to claim 1, characterized in that: The support frame also includes a base plate support plate (18), the top of the base plate support plate (18) is connected to a base plate column (17) and a mounting plate column (19), the top of the mounting plate column (19) is connected to a first nut (13), the cylinder mounting plate (22) is mounted on the top of the mounting plate column (19) through the first nut (13), the base plate column (17) passes through the cylinder mounting plate (22) and is connected to the support block mounting plate (25) at the top.

6. The large-caliber electromagnetic flowmeter excitation coil forming device according to claim 5, characterized in that: The bottom of the cylinder mounting plate (22) is connected with a linear bearing (14), and the pulling shaft (15) is slidably connected to the linear bearing (14).

7. The large-caliber electromagnetic flowmeter excitation coil forming device according to claim 4, characterized in that: A hole slot is provided on the top of the support block mounting plate (25) for the fixing buckle (11) to pass through. The coil left and right limiters (24) are located on one side of the hole slot, and the other side of the hole slot is connected to the coil forming limiter (1).

8. The large-caliber electromagnetic flowmeter excitation coil forming device according to claim 1, characterized in that: The coil support block (3) is provided with a groove for accommodating the coil ejection block (2), and the bottom of the coil ejection block (2) is arc-shaped.

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