High stability pressure transmitter

Abstract

The application relates to the technical field of pressure transmitters, and discloses a high-stability pressure transmitter which comprises a flange plate, the top of the flange plate is fixedly connected with a first pipe fitting, the top of the first pipe fitting is fixedly connected with a second pipe fitting, the top of the second pipe fitting is fixedly connected with a main body bin, the surface of the flange plate is detachably provided with a servo motor on one side, the inside of the main body bin is fixedly connected with an electric cylinder, the output shaft of the electric cylinder is fixedly connected with a mounting frame, the end, away from the electric cylinder, of the mounting frame is fixedly connected with a diaphragm, and the mounting frame is slidably connected with the second pipe fitting; the special-shaped sealing plate is arranged to seal the flange plate when the pipeline stops conveying, so that the liquid and gas in the pipeline cannot rise into the inside of the transmitter; and the receiving disc is arranged to clean the diaphragm, thereby prolonging the service life of the diaphragm.

Description

Technical Field

[0001] This invention relates to the field of pressure transmitter technology, specifically a high-stability pressure transmitter. Background Technology

[0002] A pressure transmitter is an instrument used to measure pressure and convert the measurement result into a standard electrical signal output. It is commonly used in industrial automation, process control, and various liquid or gas pressure measurement applications. A pressure transmitter mainly consists of a pressure sensor and a signal processing circuit, which can accurately convert physical pressure into an electrical signal and then send it to the control system or display device for processing.

[0003] For corrosive and adhesive liquids or gases, after a period of use, even after the pipeline used to transport the liquid or gas stops, some untransported liquid or gas remains in the pipeline. For the diaphragm of the pressure transmitter, which is used to sense external pressure and is relatively fragile, corrosion may occur on the diaphragm surface, affecting its accuracy and service life. In addition, contaminants deposited on the diaphragm surface may also affect the normal operation of the diaphragm, especially in applications requiring high measurement accuracy. Therefore, we propose a highly stable pressure transmitter. Summary of the Invention

[0004] The purpose of this invention is to provide a highly stable pressure transmitter to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: It includes a flange, a first pipe fitting fixedly connected to the top of the flange, a second pipe fitting fixedly connected to the top of the first pipe fitting, a main body chamber fixedly connected to the top of the second pipe fitting, and a servo motor detachably mounted on one side of the flange surface;

[0005] The output end of the servo motor is rotatably connected to a rotating rod, and a gear is fixedly connected to the rotating rod. There are two gears. The inside of the flange is rotatably connected to a ring body. Several internal racks are arranged in a ring on the inner surface of the ring body. An external rack is fixedly connected to the outer surface of the ring body. The external rack meshes with one of the gears at the bottom. Several missing gears are rotatably connected to the inside of the flange. The missing gears mesh with the internal racks. A special-shaped sealing plate is fixedly connected to the missing gears.

[0006] The first pipe fitting has an inner tube inside, the bottom of which is fixedly connected to a flange. A collar is rotatably connected to the inner tube, and several wedge-shaped strips are arranged in a ring on the outer surface of the collar. A sealing frame strip one and a sealing frame strip two are symmetrically slidably connected to the inner tube. There are two sealing frame strips one and two sealing frame strips two of each, and they are joined together to form a ring.

[0007] An external rack two is fixedly connected to the outer surface of the collar. A gear two is rotatably connected to the side of the first tube near the servo motor. One side of the gear two meshes with the external rack two, and the other side meshes with one of the top gears.

[0008] An electric cylinder is fixedly connected inside the main compartment. The output shaft of the electric cylinder is fixedly connected to a mounting bracket. A diaphragm is fixedly connected to the end of the mounting bracket away from the electric cylinder. The mounting bracket is slidably connected to the second pipe fitting.

[0009] Preferably, one side of the irregularly shaped sealing plate is provided with a pressure port, and the other side is fixedly connected with a pressure strip. Several irregularly shaped sealing plates are spliced ​​together to seal the bottom surface of the flange. The pressure port and the pressure strip are used to make the irregularly shaped sealing plates splice together to improve the sealing effect of the flange.

[0010] Preferably, a mating ring is fixedly connected to the bottom of the flange, the diameter of the mating ring is equal to the diameter formed by opening the plurality of irregular sealing plates, and the diameter of the diaphragm is equal to the diameter of the mating ring.

[0011] Preferably, the two sealing frame strips one and two sealing frame strips two are slidably connected to the first pipe fitting on the side away from the inner pipe, and a spring is sleeved and installed at the connection with the first pipe fitting.

[0012] Preferably, the two sealing frame strips one and the two sealing frame strips two are joined together to form a ring, which is used to make the side of the mounting bracket near the diaphragm fit tightly against the top surface of the flange, and the surface in contact with the mounting bracket is made of rubber.

[0013] Preferably, a bracket is provided above one side of the mounting bracket, the bracket is slidably connected to the second pipe fitting, an inner claw is fixedly connected to the bottom of the bracket, and a swing arm is symmetrically installed on the bottom surface of the second pipe fitting near the inner claw. The swing arm is rotatably connected to the second pipe fitting and abuts against the inner surface of the inner claw. A receiving plate is slidably connected to the end of the swing arm, and the receiving plate is slidably connected to the second pipe fitting.

[0014] Preferably, a water pump is fixedly installed on the side wall of the second pipe fitting, and the output end of the water pump is connected to a flexible hose, with the end of the flexible hose away from the water pump connected to the interior of the receiving plate.

[0015] Preferably, the receiving plate is provided with several nozzles, which are interconnected. One of the nozzles is connected to a hose. The surface of the receiving plate is provided with several coaxially arranged water guide grooves. The height of the two sides of the water guide grooves is higher than the height of the center, and a through hole is provided at the center.

[0016] Preferably, a side box is fixedly installed on the bottom of the outer wall of the second pipe fitting, and a telescopic pipe is slidably connected inside the side box. The telescopic pipe communicates with the through hole and is fixedly connected to the receiving plate. A water pump is fixedly installed on the side box at the end away from the telescopic pipe.

[0017] Preferably, a tension spring is connected to the bottom of the receiving tray, and the end of the tension spring away from the receiving box is fixedly connected to the second pipe fitting, and a dehumidifier is fixedly installed on one side of the top of the second pipe fitting.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. In this invention, by setting irregularly shaped sealing plates, when the pipeline stops conveying, the servo motor is started, which drives the four missing gears to rotate, and at the same time drives the four irregularly shaped sealing plates to fit together to seal the flange, which can prevent the liquid and gas in the pipeline from rising and entering the transmitter. The airtightness is also improved by the pressure port and pressure strip.

[0020] 2. In this invention, the sealing frame strip 1 and sealing frame strip 2 are symmetrically arranged. When the transmitter is in use, the sealing frame strip 1 and sealing frame strip 2 are spliced ​​together to seal the connection between the mounting frame and the second pipe fitting. When the transmitter is not in use, the gear 1 drives the opening synchronously, canceling the limit on the diaphragm, so that the electric cylinder drives the mounting frame and the diaphragm to rise up away from the pipeline and protect the diaphragm.

[0021] 3. In this invention, by setting up receiving plates, during the process of the diaphragm rising to a high position, the grippers drive the two receiving plates to dock and are located directly below the diaphragm. The nozzle sprays dissolving liquid and cleaning liquid onto the surface of the diaphragm from bottom to top, which can clean the diaphragm and prevent corrosive and polluting substances from depositing on the diaphragm surface, causing damage to the diaphragm, thereby affecting the measurement accuracy and improving the service life and stability of the diaphragm. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the flange, ring body, and internal rack of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the pressure strip, pressure opening, and irregular sealing plate of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the wedge-shaped strip, sealing frame strip one, and sealing frame strip two of the present invention;

[0027] Figure 6This is a schematic diagram of the unfolded structure of sealing frame strip one and sealing frame strip two of the present invention;

[0028] Figure 7 This is a cross-sectional view of the second pipe fitting of the present invention;

[0029] Figure 8 This is a schematic diagram of the water guide channel and through hole of the present invention.

[0030] In the diagram: 1. Flange; 2. First fitting; 3. Second fitting; 4. Main body; 5. Servo motor; 6. Rotating rod; 7. Gear 1; 8. Ring body; 9. Internal rack; 10. External rack 1; 11. Missing gear; 12. Irregular sealing plate; 13. Pressure port; 14. Pressure strip; 15. Butt ring; 16. Inner tube; 17. Collar; 18. Wedge strip; 19. Sealing frame strip 1; 20. Sealing frame 21. Spring; 22. External rack and pinion 2; 23. Gear 2; 24. Electric cylinder; 25. Mounting bracket; 26. Diaphragm; 27. Hanger; 28. Inner claw; 29. ​​Swing arm; 30. Receiving plate; 31. Water pump; 32. Hose; 33. Nozzle; 34. Water guide channel; 35. Through hole; 36. Side box; 37. Telescopic tube; 38. Water pump; 39. Tension spring; 40. Dehumidifier. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1 to 8 The present invention provides a technical solution: including a flange 1, a first pipe fitting 2 fixedly connected to the top of the flange 1, a second pipe fitting 3 fixedly connected to the top of the first pipe fitting 2, a main body compartment 4 fixedly connected to the top of the second pipe fitting 3, and a servo motor 5 detachably installed on one side of the surface of the flange 1.

[0033] The output end of the servo motor 5 is rotatably connected to a rotating rod 6, and a gear 7 is fixedly connected to the rotating rod 6. There are two gears 7. The inside of the flange 1 is rotatably connected to a ring body 8. Several internal racks 9 are arranged in a ring on the inner surface of the ring body 8. An external rack 10 is fixedly connected to the outer surface of the ring body 8. The external rack 10 meshes with one of the bottom gears 7. Several missing gears 11 are rotatably connected to the inside of the flange 1. The missing gears 11 mesh with the internal racks 9. A special-shaped sealing plate 12 is fixedly connected to the missing gears 11.

[0034] The first pipe fitting 2 has an inner pipe 16 inside. The bottom of the inner pipe 16 is fixedly connected to the flange 1. A collar 17 is rotatably connected to the inner pipe 16. Several wedge-shaped strips 18 are arranged in a ring on the outer surface of the collar 17. A sealing frame strip 19 and a sealing frame strip 20 are symmetrically slidably connected to the inner pipe 16. There are two sealing frame strips 19 and two sealing frame strips 20, which are joined together to form a ring.

[0035] An external rack 22 is fixedly connected to the outer surface of the collar 17. A gear 23 is rotatably connected to the side of the first tube 2 near the servo motor 5. One side of the gear 23 meshes with the external rack 22, and the other side meshes with one of the top gears 7.

[0036] An electric cylinder 24 is fixedly connected inside the main body 4. An output shaft of the electric cylinder 24 is fixedly connected to a mounting bracket 25. A diaphragm 26 is fixedly connected to the end of the mounting bracket 25 away from the electric cylinder 24. The mounting bracket 25 is slidably connected to the second tube 3.

[0037] In this embodiment, the transmitter diaphragm 26 is mainly used to sense the pressure change of the measured medium. When the pressure of the measured medium acts on the diaphragm 26, the diaphragm 26 will deform accordingly. The amount of deformation is proportional to the pressure. When the transmitter is not in use, the diaphragm 26 needs to be cleaned regularly in accordance with the correct method to prevent dust, oil and corrosive media from adhering to the surface of the diaphragm 26 and affecting the measurement accuracy.

[0038] Please see Figures 5 to 6 The present invention provides a technical solution: a pressure port 13 is provided on one side of the irregular sealing plate 12, and a pressure strip 14 is fixedly connected to the other side. Several irregular sealing plates 12 are spliced ​​together to seal the bottom surface of the flange 1. The pressure port 13 and the pressure strip 14 are used to make the irregular sealing plates 12 splice together to improve the sealing effect of the flange 1.

[0039] A mating ring 15 is fixedly connected to the bottom of the flange 1. The diameter of the mating ring 15 is equal to the diameter formed by opening several irregular sealing plates 12. The diameter of the diaphragm 26 is equal to the diameter of the mating ring 15.

[0040] The two sealing frame strips 19 and 20 are slidably connected to the first pipe fitting 2 on the side away from the inner tube 16, and a spring 21 is sleeved and installed at the connection with the first pipe fitting 2.

[0041] Two sealing frame strips 19 and two sealing frame strips 20 are joined together to form a ring, which is used to make the side of the mounting bracket 25 close to the diaphragm 26 tightly attached to the top surface of the flange 1, and the surface in contact with the mounting bracket 25 is made of rubber.

[0042] In this embodiment, the side of sealing frame strip 19 and sealing frame strip 20 that contacts the mounting bracket 25 is made of rubber. Rubber has good elasticity and can undergo large deformation when subjected to external force. When the external force is removed, it can return to its original shape. In use, it can fill the gap between the sealing surfaces, thereby preventing gas or liquid in the pipeline from flowing into the main chamber 4 and achieving a sealing effect.

[0043] Please see Figures 7 to 8 The present invention provides a technical solution: a hanging bracket 27 is provided above one side of the mounting bracket 25, the hanging bracket 27 is slidably connected to the second pipe fitting 3, an inner claw 28 is fixedly connected to the bottom of the hanging bracket 27, a swing arm 29 is symmetrically installed on the bottom surface of the second pipe fitting 3 near the inner claw 28, the swing arm 29 is rotatably connected to the second pipe fitting 3 and abuts against the inner surface of the inner claw 28, and a receiving plate 30 is slidably connected to the end of the swing arm 29, the receiving plate 30 is slidably connected to the second pipe fitting 3;

[0044] A water pump 31 is fixedly installed on the side wall of the second pipe fitting 3. The output end of the water pump 31 is connected to a hose 32. The end of the hose 32 away from the water pump 31 is connected to the inside of the receiving plate 30.

[0045] The receiving plate 30 is provided with several nozzles 33, which are interconnected. One of the nozzles 33 is connected to the hose 32. Several coaxial water guide grooves 34 are provided on the surface of the receiving plate 30. The height of the two sides of the water guide grooves 34 is higher than the height of the center, and a through hole 35 is provided at the center.

[0046] A side box 36 is fixedly installed on the bottom of the outer wall of the second pipe fitting 3. A telescopic pipe 37 is slidably connected inside the side box 36. The telescopic pipe 37 communicates with the through hole 35 and is fixedly connected to the receiving plate 30. A water pump 38 is fixedly installed on the side box 36 at the end away from the telescopic pipe 37.

[0047] A tension spring 39 is connected to the bottom of the receiving plate 30. The end of the tension spring 39 away from the receiving box is fixedly connected to the second pipe fitting 3. A dehumidifier 40 is fixedly installed on one side of the top of the second pipe fitting 3.

[0048] In this embodiment, when the water pump 31 draws water from the water source, a dissolving solution can be added to the membrane 26 after it has been used. The solution is then sprayed onto the surface of the membrane 26 through the nozzle 33, which can dissolve and remove some of the adhesive substances.

[0049] The method of use and advantages of this invention: This highly stable pressure transmitter operates as follows:

[0050] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown:

[0051] S1: In the initial state, flange 1 is in the open state, the irregular sealing plate 12 is retracted, and tension spring 39 is in the contracted state. When the machine stops, a command is sent. The command is transmitted to the servo driver through the communication interface. The servo motor 5 runs and drives the rotating rod 6 to rotate. The two gears 7 on the rotating rod 6 rotate synchronously. One of the gears 7 at the bottom rotates clockwise, driving the ring body 8 to rotate clockwise. During the process, several internal racks 9 that mesh with the missing gear 11 drive the missing gear 11 to rotate. This causes the missing gear 11 to drive the irregular sealing plate 12 to rotate around the missing gear 11 as the axis and move closer to each other. After the rotation is completed, each irregular sealing plate 12 is joined together by the pressure port 13 and pressure strip 14 on the surface to form a complete disc and seal it, thus sealing flange 1 and preventing liquid and gas in the pipeline from rising.

[0052] S2: While flange 1 is being sealed, gear 7 at the top rotates synchronously, driving gear 23 to rotate counterclockwise. Gear 23 drives collar 17, which is equipped with external rack 22, to rotate clockwise. At the same time, it drives wedge 18 to contact the corresponding sealing frame 19 and sealing frame 20, causing sealing frame 19 and sealing frame 20 to be pushed outward on the first pipe fitting 2 and inner pipe 16, and gradually disengaging from their combined state. This compresses spring 21, causing sealing frame 19 and sealing frame 20 to be removed from mounting bracket 25, thus removing the obstruction above mounting bracket 25. Subsequently, the output shaft of electric cylinder 24 retracts, driving mounting bracket 25 and diaphragm 26 to move upward synchronously during the process.

[0053] S3: During the ascent of the mounting bracket 25, after the bottom surface of the diaphragm 26 is higher than the height of the receiving plate 30, the mounting bracket 25 lifts the hanging bracket 27 upwards, causing the inner claws 28 at the bottom of the hanging bracket 27 to rise synchronously. During this process, the inwardly contracting inner claws 28 push the swing arm 29 towards each other, causing the swing arm 29 to swing around its connection point with the second pipe fitting 3, thus bringing the two receiving plates 30 closer together. After the mounting bracket 25 rises to its highest position, the two receiving plates 30 are joined together, forming a disc at the bottom of the diaphragm 26. While collecting residual liquid from the diaphragm 26, the water pump 31 is started to spray water onto the hose 32, and a high-humidity spray is sprayed from the nozzle 33, which adheres to the surface of the diaphragm 26 to dilute and dissolve the residual impurities and liquid on the diaphragm 26. After dissolution, the liquid falls into the water guide trough 34, and several water guide troughs 34 are connected by through holes 35, so that the wastewater is extracted from the inside of the transmitter by the water pump 38. After cleaning, the dehumidifier 40 is started to dry the water vapor in the transmitter, further improving the service life of the diaphragm 26.

[0054] 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 preferred examples and are not intended to limit 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 high-stability pressure transmitter, characterized in that, Includes a flange (1), a first pipe fitting (2) is fixedly connected to the top of the flange (1), a second pipe fitting (3) is fixedly connected to the top of the first pipe fitting (2), a main body compartment (4) is fixedly connected to the top of the second pipe fitting (3), and a servo motor (5) is detachably installed on one side of the surface of the flange (1). The output end of the servo motor (5) is rotatably connected to a rotating rod (6), and a gear (7) is fixedly connected to the rotating rod (6). There are two gears (7). The inside of the flange (1) is rotatably connected to a ring body (8). Several internal racks (9) are arranged in a ring on the inner surface of the ring body (8). An external rack (10) is fixedly connected to the outer surface of the ring body (8). The external rack (10) meshes with one of the gears (7) at the bottom. Several missing gears (11) are rotatably connected to the inside of the flange (1). The missing gears (11) mesh with the internal racks (9). A special-shaped sealing plate (12) is fixedly connected to the missing gears (11). The first pipe fitting (2) has an inner pipe (16) inside. The bottom of the inner pipe (16) is fixedly connected to the flange (1). A collar (17) is rotatably connected to the inner pipe (16). Several wedge-shaped strips (18) are arranged in a ring on the outer surface of the collar (17). A sealing frame strip one (19) and a sealing frame strip two (20) are symmetrically slidably connected to the inner pipe (16). There are two sealing frame strips one (19) and two sealing frame strips two (20) respectively, and they are combined into a ring. An external rack two (22) is fixedly connected to the outer surface of the collar (17). A gear two (23) is rotatably connected to the side of the first tube (2) near the servo motor (5). One side of the gear two (23) meshes with the external rack two (22), and the other side meshes with one of the top gears (7). An electric cylinder (24) is fixedly connected inside the main compartment (4). An installation frame (25) is fixedly connected to the output shaft of the electric cylinder (24). A diaphragm (26) is fixedly connected to one end of the installation frame (25) away from the electric cylinder (24). The installation frame (25) is slidably connected to the second pipe (3).

2. The high-stability pressure transmitter according to claim 1, characterized in that: The irregular sealing plate (12) has a pressure port (13) on one side and a pressure strip (14) fixedly connected to the other side. Several irregular sealing plates (12) are spliced ​​together to seal the bottom surface of the flange (1). The pressure port (13) and the pressure strip (14) are used to make the irregular sealing plates (12) splice together to improve the sealing effect of the flange (1).

3. A high-stability pressure transmitter according to claim 2, characterized in that: The bottom of the flange (1) is fixedly connected to a docking ring (15). The diameter of the docking ring (15) is equal to the diameter formed by opening several of the irregular sealing plates (12). The diameter of the diaphragm (26) is equal to the diameter of the docking ring (15).

4. A high-stability pressure transmitter according to claim 1, characterized in that: Both of the two sealing frame strips one (19) and the two sealing frame strips two (20) are slidably connected to the first pipe fitting (2) on the side away from the inner tube (16), and a spring (21) is sleeved at the connection with the first pipe fitting (2).

5. A high-stability pressure transmitter according to claim 4, characterized in that: The two sealing frame strips one (19) and the two sealing frame strips two (20) are joined together to form a ring, which is used to make the side of the mounting bracket (25) close to the diaphragm (26) fit tightly against the top surface of the flange (1), and the surface in contact with the mounting bracket (25) is made of rubber.

6. A high-stability pressure transmitter according to claim 5, characterized in that: A hanging bracket (27) is provided above one side of the mounting bracket (25). The hanging bracket (27) is slidably connected to the second pipe fitting (3). An inner claw (28) is fixedly connected to the bottom of the hanging bracket (27). A swing arm (29) is symmetrically installed on the bottom surface of the second pipe fitting (3) near the inner claw (28). The swing arm (29) is rotatably connected to the second pipe fitting (3) and abuts against the inner surface of the inner claw (28). A receiving plate (30) is slidably connected to the end of the swing arm (29). The receiving plate (30) is slidably connected to the second pipe fitting (3).

7. A high-stability pressure transmitter according to claim 6, characterized in that: A water pump (31) is fixedly installed on the side wall of the second pipe fitting (3). The output end of the water pump (31) is connected to a hose (32). The end of the hose (32) away from the water pump (31) is connected to the inside of the receiving plate (30).

8. A high-stability pressure transmitter according to claim 7, characterized in that: The receiving plate (30) is provided with several nozzles (33), which are interconnected. One of the nozzles (33) is connected to the hose (32). The surface of the receiving plate (30) is provided with several coaxially arranged water guide grooves (34). The height of the two sides of the water guide grooves (34) is higher than the height of the center, and a through hole (35) is provided at the center.

9. A high-stability pressure transmitter according to claim 7, characterized in that: A side box (36) is fixedly installed on the bottom of the outer wall of the second pipe fitting (3). A telescopic pipe (37) is slidably connected inside the side box (36). The telescopic pipe (37) communicates with the through hole (35) and is fixedly connected to the receiving plate (30). A water pump (38) is fixedly installed on the side box (36) at the end away from the telescopic pipe (37).

10. A high-stability pressure transmitter according to claim 9, characterized in that, The bottom of the receiving plate (30) is connected to a tension spring (39), and the end of the tension spring (39) away from the receiving box is fixedly connected to the second pipe (3). A dehumidifier (40) is fixedly installed on one side of the top of the second pipe (3).

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