High-stability pressure transmitter

Abstract

The invention 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, and the top of the second pipe fitting is fixedly connected with a main body bin. A servo motor is detachably mounted on one side of the surface of the flange plate, an electric cylinder is fixedly connected to the interior of the main body bin, an output shaft of the electric cylinder is fixedly connected with a mounting frame, a membrane is fixedly connected to the end, away from the electric cylinder, of the mounting frame, and the mounting frame is slidably connected with a second pipe fitting. When the pipeline stops conveying, the flange plate is blocked, liquid and gas in the pipeline can be prevented from rising and entering the transmitter, the diaphragm can be cleaned through the arranged bearing plate, and the service life of the diaphragm is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure transmitters, and particularly to a pressure transmitter with high stability. Background Art

[0002] A pressure transmitter is an instrument used to measure pressure and convert the measurement result into a standard electrical signal output. It is usually used in industrial automation, process control, and various occasions for measuring the pressure of liquids or gases. The 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 a control system or a display device for processing;

[0003] For corrosive and adhesive liquids or gases, after the pressure transmitter has been used for a period of time, when the pipeline for transporting the liquid or gas stops transporting, there are still some untransported liquids and gases remaining in the pipeline. For the diaphragm of the pressure transmitter, which is used to sense the external pressure and is relatively fragile, it may cause corrosion on the surface of the diaphragm, affecting its accuracy and service life. In addition, the deposition of pollutants on the surface of the diaphragm may also affect the normal operation of the diaphragm, especially in applications where high measurement accuracy is required. Therefore, we have proposed a pressure transmitter with high stability. Summary of the Invention

[0004] The purpose of the present invention is to provide a pressure transmitter with high stability to solve the problems raised in the above background art. To achieve the above purpose, the present invention provides the following technical solutions: including a flange, a first pipe fitting is fixedly connected to the top of the flange, a second pipe fitting is fixedly connected to the top of the first pipe fitting, a main body chamber is fixedly connected to the top of the second pipe fitting, and a servo motor is detachably installed on one side of the surface of the flange;

[0005] The output end of the servo motor is rotationally connected to a rotating rod, a first gear is fixedly connected to the rotating rod, there are two first gears, a ring body is rotationally connected to the inside of the flange, a plurality of internal racks are annularly arranged on the inner surface of the ring body, an external rack one is fixedly connected to the outer surface of the ring body, the external rack one meshes with one of the bottom first gears, a plurality of partial gears are rotationally connected to the inside of the flange, the partial gears mesh with the internal racks, and a special-shaped sealing plate is fixedly connected to the partial gears;

[0006] An inner pipe is arranged inside the first pipe fitting, the bottom of the inner pipe is fixedly connected to the flange, a collar is rotationally connected to the inner pipe, a plurality of wedge-shaped strips are annularly arranged on the outer surface of the collar, a first sealing frame strip and a second sealing frame strip are respectively and symmetrically slidably connected to the inner pipe, there are two first sealing frame strips and two second sealing frame strips respectively, and they are combined into a ring;

[0007] On the outer surface of the collar, a second external rack is fixedly connected. On one side of the first pipe fitting close to the servo motor, a second gear is rotatably connected. One side of the second gear meshes with the second external rack, and the other side meshes with one of the first gears at the top.

[0008] Inside the main body bin, an electric cylinder is fixedly connected. The output shaft of the electric cylinder is fixedly connected with a mounting frame. One end of the mounting frame far from the electric cylinder is fixedly connected with a diaphragm. The mounting frame is slidably connected with the second pipe fitting.

[0009] Preferably, on one side of the special-shaped sealing plate, there is a crimping port, and on the other side, a pressing strip is fixedly connected. Several special-shaped sealing plates are joined together to block the bottom surface of the flange. The crimping port and the pressing strip are used to join the special-shaped sealing plates together to improve the sealing effect of the flange.

[0010] Preferably, a docking ring is fixedly connected to the bottom of the flange. The diameter size of the docking ring is equal to the diameter size formed by opening several special-shaped sealing plates. The diameter of the diaphragm is equal to the diameter of the docking ring.

[0011] Preferably, on the side far from the inner pipe of both of the first sealing frame strips and both of the second sealing frame strips, they are slidably connected with the first pipe fitting, and springs are sleeved at the connection with the first pipe fitting.

[0012] Preferably, both of the first sealing frame strips and both of the second sealing frame strips are joined together to form a ring, which is used to make the surface of the mounting frame close to the diaphragm closely adhere to the top surface of the flange, and the surface in contact with the mounting frame is made of rubber material.

[0013] Preferably, above one side of the mounting frame, there is a hanging frame, which is slidably connected with the second pipe fitting. At the bottom of the hanging frame, an inner claw is fixedly connected. On the bottom surface of the second pipe fitting near the inner claw, swing arms are symmetrically installed. The swing arms are rotatably connected with the second pipe fitting and abut against the inner surface of the inner claw. The end of the swing arm is slidably connected with a receiving plate, and the receiving plate is slidably connected with the second pipe fitting.

[0014] Preferably, a water pump is fixedly installed on the side wall of the second pipe fitting. The output end of the water pump is communicated with a hose, and one end of the hose far from the water pump is communicated with the inside of the receiving plate.

[0015] Preferably, several spray nozzles are communicated on the receiving plate. The several spray nozzles are communicated with each other. One of the spray nozzles is communicated with the hose. On the surface of the receiving plate, several water guide grooves are arranged coaxially. The height on both sides of the several water guide grooves is higher than the height at the center, and a through hole is arranged at the center.

[0016] Preferably, a side box is fixedly installed at the bottom of the outer wall of the second pipe fitting. 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 tray. A water pump is fixedly installed at one end of the side box away from the telescopic pipe.

[0017] Preferably, a tension spring is connected to the bottom of the receiving tray. The end of the tension spring away from the receiving box is fixedly connected to the second pipe fitting. 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 the present invention, through the provided special-shaped sealing plate, when the pipeline stops conveying, the servo motor is started to drive the four missing gears to rotate, and at the same time drive the four special-shaped sealing plates to fit together to block the flange, which can prevent the liquid and gas in the pipeline from rising and entering the transmitter, and through the pressure port and the pressure strip, the airtightness is improved;

[0020] 2. In the present invention, through the symmetrically arranged sealing frame strip one and sealing frame strip two, when the transmitter is in use, the sealing frame strip one and the sealing frame strip two fit together to seal the connection between the mounting frame and the second pipe fitting. When the transmitter stops being used, it is driven by the first gear to open synchronously, cancel the limit of the diaphragm, and make the electric cylinder drive the mounting frame and the diaphragm to rise and move away from the pipeline to protect the diaphragm;

[0021] 3. In the present invention, through the provided receiving tray, during the process of the diaphragm rising to the high position, the two receiving trays are driven by the clamping jaws to be butted and located directly below the diaphragm. The spray head sprays the dissolving liquid and the cleaning liquid onto the surface of the diaphragm from bottom to top, which can clean the diaphragm, prevent corrosive substances and contaminants from depositing on the surface of the diaphragm, damage the diaphragm, and thus affect the measurement accuracy, and improve the service life and stability of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the overall structural schematic diagram of the present invention;

[0023] Figure 2 is the sectional structural schematic diagram of the present invention;

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

[0025] Figure 4 is the structural schematic diagram of the pressure strip, the pressure port and the special-shaped sealing plate of the present invention;

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

[0027] Figure 6It is a schematic diagram of the unfolded structure of the sealing frame strip 1 and the sealing frame strip 2 of the present invention;

[0028] Figure 7 is a schematic diagram of the cross-section structure of the second pipe member of the present invention;

[0029] Figure 8 It is a schematic structural diagram of the water guide groove and the through hole of the present invention.

[0030] In the figure: 1, flange; 2, first pipe fitting; 3, second pipe fitting; 4, main body; 5, servo motor; 6, rotating rod; 7, gear 1; 8, ring body; 9, inner rack; 10, outer rack 1; 11, missing gear; 12, special-shaped sealing plate; 13, pressure port; 14, pressure strip; 15, docking ring; 16, inner tube; 17, sleeve ring; 18, wedge strip; 19, sealing frame strip 1; 20, sealing frame 2. Rack 2; 21. Spring; 22. External rack 2; 23. Gear 2; 24. Electric cylinder; 25. Mounting bracket; 26. Diaphragm; 27. Hanging bracket; 28. Inner claw; 29. ​​Swing arm; 30. Receiving plate; 31. Water pump; 32. Hose; 33. Nozzle; 34. Water guide groove; 35. Through hole; 36. Side box; 37. Telescopic tube; 38. Water pump; 39. Tension spring; 40. Dehumidifier. DETAILED DESCRIPTION

[0031] 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 technical personnel in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figures 1 to 8 The present invention provides a technical solution: comprising a flange 1, a first pipe 2 is fixedly connected to the top of the flange 1, a second pipe 3 is fixedly connected to the top of the first pipe 2, a main body bin 4 is fixedly connected to the top of the second pipe 3, and a servo motor 5 is detachably mounted 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. Two gears 7 are provided. A ring body 8 is rotatably connected inside the flange 1. A plurality of inner racks 9 are provided in an annular shape on the inner surface of the ring body 8. An outer rack 10 is fixedly connected to the outer surface of the ring body 8. The outer rack 10 meshes with one of the gears 7 at the bottom. A plurality of missing gears 11 are rotatably connected inside the flange 1. The missing gears 11 mesh with the inner racks 9. A special-shaped sealing plate 12 is fixedly connected to the missing gears 11.

[0034] Inside the first pipe fitting 2, there is an inner pipe 16. 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. A number of wedge-shaped strips 18 are annularly arranged on the outer surface of the collar 17. A first sealing frame strip 19 and a second sealing frame strip 20 are respectively and symmetrically slidably connected to the inner pipe 16. There are two first sealing frame strips 19 and two second sealing frame strips 20 respectively, and they are assembled into a ring together;

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

[0036] An electric cylinder 24 is fixedly connected inside the main body bin 4. The output shaft of the electric cylinder 24 is fixedly connected to a mounting frame 25. One end of the mounting frame 25 away from the electric cylinder 24 is fixedly connected to a diaphragm 26. The mounting frame 25 is slidably connected to the second pipe fitting 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 produce corresponding deformation, and its deformation amount is proportional to the applied pressure. When the transmitter is not in use, the diaphragm 26 needs to be cleaned regularly according to the correct method to prevent dust, oil stains, corrosive media, etc. from adhering to the surface of the diaphragm 26 and affecting the measurement accuracy;

[0038] Please refer to Figures 5 to 6 , the present invention provides a technical solution: a pressure port 13 is provided on one side of the special-shaped sealing plate 12, and a pressure strip 14 is fixedly connected to the other side. Several special-shaped sealing plates 12 are assembled together to block the bottom surface of the flange 1. The pressure port 13 and the pressure strip 14 are used to make the special-shaped sealing plates 12 fit together to improve the sealing effect of the flange 1;

[0039] A docking ring 15 is fixedly connected to the bottom of the flange 1. The caliber size of the docking ring 15 is equal to the caliber size formed by opening several special-shaped sealing plates 12. The diameter of the diaphragm 26 is equal to the caliber of the docking ring 15.

[0040] The sides of the two first sealing frame strips 19 and the two second sealing frame strips 20 away from the inner pipe 16 are both slidably connected to the first pipe fitting 2, and a spring 21 is sleeved and installed at the connection with the first pipe fitting 2;

[0041] The two first sealing frame strips 19 and the two second sealing frame strips 20 are assembled into a ring to make the surface of the mounting frame 25 close to the diaphragm 26 closely fit with the top surface of the flange 1, and the surface in contact with the mounting frame 25 is made of rubber material;

[0042] In this embodiment, for the first sealing strip 19 and the second sealing strip 20, the surface in contact with the mounting frame 25 is made of rubber. Rubber has good elasticity and can undergo large deformations when subjected to external forces and return to its original shape after the external forces are removed. During use, it can fill the gaps between the sealing surfaces, thereby preventing the gas or liquid in the pipeline from flowing into the main body bin 4 and achieving the sealing effect.

[0043] Please refer to Figures 7 to 8 , the present invention provides a technical solution: There is a hanging rack 27 above one side of the mounting frame 25. The hanging rack 27 is slidably connected to the second pipe fitting 3. A inner claw 28 is fixedly connected to the bottom of the hanging rack 27. Swing arms 29 are symmetrically installed on the bottom surface of the second pipe fitting 3 near the inner claw 28. The swing arms 29 are rotatably connected to the second pipe fitting 3 and are in contact with the inner surface of the inner claw 28. A receiving tray 30 is slidably connected to the end of the swing arm 29. The receiving tray 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 communicated with a hose 32. One end of the hose 32 away from the water pump 31 is communicated with the inside of the receiving tray 30;

[0045] Several spray nozzles 33 are communicatively arranged on the receiving tray 30. The several spray nozzles 33 are communicated with each other. One of the spray nozzles 33 is communicated with the hose 32. Several water guide grooves 34 arranged coaxially are formed on the surface of the receiving tray 30. The height on both sides of the several water guide grooves 34 is higher than the height at the center, and a through hole 35 is formed at the center;

[0046] A side box 36 is fixedly installed at 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 is communicated with the through hole 35 and is fixedly connected to the receiving tray 30. A water extraction pump 38 is fixedly installed at one end of the side box 36 away from the telescopic pipe 37;

[0047] A tension spring 39 is connected to the bottom of the receiving tray 30. One 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, for the used diaphragm 26, when the water pump 31 extracts water, a dissolving liquid can be added and sprayed on the surface of the diaphragm 26 through the spray nozzles 33, which can dissolve and shed some adhering substances;

[0049] The usage method and advantages of the present invention: This highly stable pressure transmitter works as follows:

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

[0051] S1: In the initial state, the flange 1 is in an open state, the special-shaped sealing plate 12 is retracted, and the tension spring 39 is in a contracted state. When the machine is stopped, a command is sent, and the command is transmitted to the servo driver through the communication interface. The servo motor 5 runs, driving the rotating rod 6 to rotate, and the two gears 7 on the rotating rod 6 rotate synchronously. One of the gears 7 located at the bottom rotates forward, driving the ring body 8 to rotate in a clockwise direction. During the process, a number of inner racks 9 meshing with the missing gear 11 drive the missing gear 11 to rotate, so that the missing gear 11 drives the special-shaped sealing plate 12 to rotate with the missing gear 11 as the axis, and approach each other. After the rotation is completed, each special-shaped sealing plate 12 is matched with each other through the pressure port 13 and the pressure strip 14 on the surface to form a complete disc and seal, thereby sealing the flange 1 to prevent the liquid and gas in the pipeline from rising;

[0052] S2: When the flange 1 is blocked, the gear 1 7 at the top rotates synchronously, driving the gear 2 23 to rotate counterclockwise, and the gear 2 23 drives the collar 17 equipped with the outer rack 2 22 to rotate clockwise, and at the same time, drives the wedge strip 18 to contact the corresponding sealing frame strip 1 19 and sealing frame strip 2 20, so that the sealing frame strip 1 19 and sealing frame strip 2 20 are pushed outward on the first pipe 2 and the inner pipe 16, and gradually disconnect the spliced ​​state, compress the spring 21, and remove the sealing frame strip 1 19 and sealing frame strip 20 from the mounting frame 25, so that the upper part of the mounting frame 25 is unblocked, and then the output shaft of the electric cylinder 24 is retracted, and the mounting frame 25 and the diaphragm 26 are driven to move upward synchronously in the process;

[0053] S3: During the rising process of the mounting frame 25, after the bottom surface of the diaphragm 26 is higher than the height of the receiving plate 30, the mounting frame 25 lifts the hanging frame 27 upward, so that the inner claws 28 at the bottom of the hanging frame 27 rise synchronously. During the process, the inner claws 28 that are retracted inward push the swing arms 29 in the direction of approaching each other, so that the swing arms 29 swing around the connection point with the second pipe 3 as the axis, driving the two receiving plates 30 to approach each other. After the mounting frame 25 rises to the high position, the two receiving plates 30 are docked and assembled into a disc at the bottom of the diaphragm 26. The residual liquid falling on the diaphragm 26 is received, and at the same time, the water delivery pump 31 is started to spray water to the hose 32, and high-humidity spray is sprayed from the nozzle 33 and attached to the surface of the diaphragm 26, so as to dilute and dissolve the impurities and liquid remaining on the diaphragm 26. After dissolution, the impurities and liquid fall into the water guide groove 34, and several water guide grooves 34 are connected by through holes 35, so that the waste water is pumped out of the interior of the transmitter through the water pump 38. After cleaning, the dehumidifier 40 is started to dry the water vapor in the transmitter, so as to further improve 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 by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present invention, and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A pressure transmitter with high stability, characterized in that, It 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 chamber (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 rotationally connected to a rotating rod (6), a first gear (7) is fixedly connected to the rotating rod (6), there are two first gears (7), a ring body (8) is rotationally connected to the inside of the flange (1), a plurality of internal racks (9) are annularly arranged on the inner surface of the ring body (8), an external rack one (10) is fixedly connected to the outer surface of the ring body (8), the external rack one (10) meshes with one of the first gears (7) at the bottom, a plurality of missing gears (11) are rotationally connected to the inside of the flange (1), the missing gears (11) mesh with the internal racks (9), and a special-shaped sealing plate (12) is fixedly connected to the missing gears (11); An inner pipe (16) is arranged inside the first pipe fitting (2), the bottom of the inner pipe (16) is fixedly connected to the flange (1), a collar (17) is rotationally connected to the inner pipe (16), a plurality of wedge-shaped strips (18) are annularly arranged on the outer surface of the collar (17), a first sealing frame strip (19) and a second sealing frame strip (20) are respectively and symmetrically slidably connected to the inner pipe (16), there are two first sealing frame strips (19) and two second sealing frame strips (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 second gear (23) is rotationally connected to one side of the first pipe fitting (2) close to the servo motor (5), one side of the second gear (23) meshes with the external rack two (22), and the other side meshes with one of the first gears (7) at the top; An electric cylinder (24) is fixedly connected to the inside of the main body chamber (4), an output shaft of the electric cylinder (24) is fixedly connected to a mounting frame (25), a diaphragm (26) is fixedly connected to one end of the mounting frame (25) away from the electric cylinder (24), and the mounting frame (25) is slidably connected to the second pipe fitting (3).

2. A highly stable pressure transmitter according to claim 1, characterized in that: One side of the special-shaped sealing plate (12) is provided with a pressing port (13), and the other side is fixedly connected to a pressing strip (14). Several special-shaped sealing plates (12) are combined with each other to block the bottom surface of the flange (1), and the pressing port (13) and the pressing strip (14) are used to make the special-shaped sealing plates (12) fit together to improve the sealing effect of the flange (1).

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

4. A highly stable pressure transmitter according to claim 1, characterized in that: One side of the two first sealing frame strips (19) and the two second sealing frame strips (20) away from the inner pipe (16) are both slidably connected to the first pipe fitting (2), and a spring (21) is sleeved and installed at the connection with the first pipe fitting (2).

5. A highly stable pressure transmitter according to claim 4, characterized in that: The two first sealing frame strips (19) and the two second sealing frame strips (20) are assembled into a ring to make the surface of the mounting frame (25) close to the diaphragm (26) closely adhere to the top surface of the flange (1), and the surface in contact with the mounting frame (25) is made of rubber material.

6. The pressure transmitter with high stability according to claim 5, wherein: A hanging frame (27) is arranged above one side of the mounting frame (25). The hanging frame (27) is slidably connected to the second pipe fitting (3). The bottom of the hanging frame (27) is fixedly connected with an inner claw (28). Swing arms (29) are symmetrically installed on the bottom surface of the second pipe fitting (3) near the inner claw (28). The swing arms (29) are rotatably connected to the second pipe fitting (3) and are abutted against the inner surface of the inner claw (28). A receiving disc (30) is slidably connected to the end of the swing arm (29). The receiving disc (30) is slidably connected to the second pipe fitting (3).

7. A highly stable 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 communicated with a hose (32). One end of the hose (32) away from the water pump (31) is communicated with the inside of the receiving disc (30).

8. The pressure transmitter with high stability according to claim 7, characterized in that: A plurality of spray heads (33) are communicatedly arranged on the receiving disc (30). The plurality of spray heads (33) are communicated with each other. One of the spray heads (33) is communicated with the hose (32). A plurality of water guide grooves (34) arranged coaxially are formed on the surface of the receiving disc (30). The heights on both sides of the plurality of water guide grooves (34) are higher than the height at the center, and a through hole (35) is formed at the center.

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

10. A highly stable pressure transmitter according to claim 9, characterized in that, A tension spring (39) is connected to the bottom of the receiving disc (30). One end of the tension spring (39) away from the receiving box is fixedly connected with the second pipe fitting (3). A dehumidifier (40) is fixedly installed on one side of the top of the second pipe fitting (3).

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