Pressure transmitter with high safety

Abstract

The invention relates to the field of pressure transmitters, in particular to a high-safety pressure transmitter which comprises a transmitter body, a transmitter pipe is fixedly installed on the outer wall of the transmitter body, a tightening nut is installed at the end of the transmitter pipe in a threaded mode, and a connecting bolt is installed in the tightening nut in a threaded mode. A first vent hole and a second connecting hole are formed in the tightening nut and the connecting bolt correspondingly, a filter screen is fixedly mounted on the inner wall of the second connecting hole, and a pressure reducing device is arranged in the second connecting hole. A large number of impurities are prevented from being carried during water passing, the water pressure impacts the pressure transmitter and the filter screen, the rotating fan blades and the blocking blades are matched with each other, the flushing pressure and the impurities are blocked, the use effect of the filter screen is improved, the problem of unstable detection of the pressure transmitter is solved, and damage to detection elements in the pressure transmitter caused by blockage is reduced.

Description

Technical Field

[0001] The invention belongs to the field of pressure transmitters, in particular to a pressure transmitter with high safety. Background Art

[0002] A pressure transmitter is a device that converts pressure into pneumatic or electric signals for control and remote transmission. It can convert physical pressure parameters such as gas and liquid sensed by the pressure measuring element sensor into standard electrical signals to supply secondary instruments such as indicator alarms, recorders, and regulators for measurement, indication, and process adjustment. It is widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemicals, oil wells, electric power, ships, machine tools, pipelines and many other industries.

[0003] A patent application with publication number CN213180472U discloses a pressure transmitter, including a mounting seat, a transmitter body and a connecting structure; the mounting seat: the appearance is a convex shape, the upper end of the mounting seat is fixedly connected to the transmitter body, the middle part of the mounting seat is through-shaped, and the lower end of the mounting seat is provided with a connecting groove; the connecting structure: includes a fixing plate, a pressure sensor, a connecting pipe, a fixing bolt and a filter screen, the fixing plate is fixedly connected in the groove at the lower end of the mounting seat, the pressure sensor is fixedly connected to the fixing plate, the appearance of the connecting pipe is an inverted convex shape, the upper end of the connecting pipe is fixedly connected to the lower surface of the mounting seat by a fixing bolt, and a connecting protrusion is arranged inside the middle position of the connecting pipe. The pressure transmitter is easy to clean when blockage occurs, the filter pipe can be disassembled separately, the cleaning process is relatively simple, and there is no need to disassemble many irrelevant parts when the sensor fails.

[0004] During use, although the above-mentioned device is equipped with a filter screen inside to reduce the impact of impurities in the pipeline on the pressure transmitter, when water is just passed through the pipeline, a large amount of impurities and water pressure will impact the pressure transmitter and the filter screen, resulting in unstable detection data of the pressure transmitter, and blockage may cause damage to the detection elements inside the pressure transmitter.

[0005] To this end, the present invention provides a pressure transmitter with high safety. Summary of the invention

[0006] The object of the present invention is to provide a pressure transmitter with a simple structure, reasonable design and high safety in order to solve the above problems, including a transmitter body, a transmitter tube is fixedly installed on the outer wall of the transmitter body, a tightening nut is threadedly installed on the end of the transmitter tube, a connecting bolt is threadedly installed on the inner thread of the tightening nut, a first vent hole and a second connecting hole are respectively arranged inside the tightening nut and the connecting bolt, the first vent hole is connected to the second connecting hole, the first vent hole is connected to the transmitter body, a filter is fixedly installed on the inner wall of the second connecting hole, a pressure reducing device is arranged inside the second connecting hole, and the pressure reducing device comprises: a first telescopic rod rotatably installed inside the filter, the filter hole is arranged inside the filter; a second telescopic rod fixedly installed at the end of the first telescopic rod; a rotating fan blade slidably installed on the outer wall of the second telescopic rod; a first spring fixedly installed on the side wall of the end of the first telescopic rod, and the first spring is concentric with the second telescopic rod.

[0007] As a further optimization scheme of the present invention, the pressure reduction device also includes: a plurality of baffle blades fixedly mounted on the side wall of the rotating fan blade, each of the baffle blades is provided with a torsion spring inside, and the radius of the baffle blades is the same as the radius of the second connecting hole.

[0008] As a further optimization solution of the present invention, the pressure reducing device further comprises: a blade groove arranged inside the baffle blade, and a protrusion is arranged between the plurality of baffle blades.

[0009] As a further optimization scheme of the present invention, a cleaning device is provided at the end of the first telescopic rod, and the cleaning device includes: a reciprocating screw fixedly installed at the top end of the first telescopic rod; an extrusion cleaning plate movably installed on the outside of the reciprocating screw; an extrusion block fixedly installed on the side wall of the extrusion cleaning plate; and a top blocking block fixedly installed at the top end of the reciprocating screw.

[0010] As a further optimization scheme of the present invention, the cleaning device also includes: a slip ring slidably installed on the outer wall of the reciprocating screw, the outer wall of the slip ring is fixedly installed with the extrusion cleaning plate; a transmission nut ring threadedly installed on the outer wall of the reciprocating screw, the transmission nut ring is concentric with the slip ring, and the slip ring is movably installed inside the transmission nut ring, and the side wall of the slip ring is fixedly installed with a limiting protrusion; a sawtooth arranged inside the transmission nut ring, and the slip ring slides on the side wall of the sawtooth; a second spring rotatably installed on the side wall of the filter screen, the second spring is concentric with the reciprocating screw, and a spring is arranged inside the transmission nut ring for lifting the slip ring.

[0011] As a further optimization scheme of the present invention, the cleaning device also includes: a lifting limit ring fixedly installed on the outer wall of the transmission nut ring; a lifting limit rod fixedly installed on the side wall of the lifting limit ring, and the end of the lifting limit rod slides inside the groove set on the inner wall of the second connecting hole.

[0012] As a further optimization scheme of the present invention, a striking device is provided at the end of the top blocking block, and the striking device includes: a first limit block rotatably installed on the top of the top blocking block; a swing rod rotatably installed inside the first limit block; a second limit block fixedly installed on the side wall of the transmission nut ring; a slide groove provided inside the swing rod, and the second limit block slides inside the slide groove; and a gravity block rotatably installed at the end of the swing rod.

[0013] As a further optimization solution of the present invention, the radius of the extrusion cleaning plate is the same as the radius of the second connecting hole, and the diameter of the extrusion block is the same as the diameter of the filtering hole.

[0014] As a further optimization solution of the present invention, the length of the swing rod is smaller than the radius of the second connecting hole.

[0015] As a further optimization solution of the present invention, when the plurality of baffle blades are fully unfolded, the circle enclosed by the plurality of baffle blades has the same diameter as the second connecting hole.

[0016] The beneficial effects of the present invention are:

[0017] 1. The high-safety pressure transmitter described in the present invention uses the first telescopic rod and the first spring inside the pressure reducing device and the rotating fan blades to buffer the pressure generated when water just flows through the pipeline, thereby preventing a large amount of impurities and water pressure from impacting the pressure transmitter and the filter when water flows. The rotating fan blades and the barrier blades cooperate with each other to block the flushing water pressure and impurities, improve the use effect of the filter, and at the same time reduce the problem of unstable detection data of the pressure transmitter and reduce the problem of damage to the detection elements inside the pressure transmitter caused by blockage.

[0018] 2. The high-safety pressure transmitter described in the present invention drives the transmission nut ring and the slip ring to rise and fall and rotate through the reciprocating screw inside the cleaning device, thereby adjusting the cleaning ability of the extrusion block on the extrusion cleaning plate on the filter holes on the filter screen, thereby improving the service life and use effect of the filter screen and reducing the problem of clogging of the filter screen during continuous use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the appearance diagram of the overall device of the present invention;

[0020] Figure 2 is a partial cutaway view of the overall device of the present invention;

[0021] Figure 3 It is a transmission diagram of the cleaning device of the present invention;

[0022] Figure 4 is a front view of the cleaning device of the present invention;

[0023] Figure 5 is an expanded view of the pressure reducing device of the present invention;

[0024] Figure 6 It is a diagram showing the coordination of the cleaning device and the pressure reducing device of the present invention;

[0025] Figure 7 yes Figure 6 A is an enlarged view.

[0026] In the figure:

[0027] 1. Transmitter body; 11. Transmitter tube; 12. Tighten the nut; 121. First vent hole; 13. Connecting bolt; 14. Second connecting hole;

[0028] 2. pressure reducing device; 21. filter screen; 211. filter hole; 22. first telescopic rod; 23. first spring; 24. second telescopic rod; 25. rotating fan blade; 26. barrier blade; 261. blade groove;

[0029] 3. Cleaning device; 31. Reciprocating screw; 32. Second spring; 33. Top stop block; 34. Extrusion cleaning plate; 35. Extrusion block; 36. Transmission nut ring; 361. Sawtooth; 37. Slip ring; 371. Limiting protrusion; 38. Lifting limiting ring; 381. Lifting limiting rod;

[0030] 4. striking device; 41. first limit block; 42. second limit block; 43. swing rod; 44. slide slot; 45. gravity block. DETAILED DESCRIPTION

[0031] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0032] like Figures 1 to 7 As shown, a high-safety pressure transmitter according to an embodiment of the present invention is provided. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5The structure shown includes a transmitter body 1, a transmitter tube 11 is fixedly installed on the outer wall of the transmitter body 1, a tightening nut 12 is threadedly installed on the end of the transmitter tube 11, a connecting bolt 13 is threadedly installed on the inner thread of the tightening nut 12, a first vent hole 121 and a second connecting hole 14 are respectively arranged inside the tightening nut 12 and the connecting bolt 13, the first vent hole 121 is connected to the second connecting hole 14, the first vent hole 121 is connected to the transmitter body 1, a filter screen 21 is fixedly installed on the inner wall of the second connecting hole 14, a pressure reducing device 2 is arranged inside the second connecting hole 14, and the pressure reducing device 2 includes: a first telescopic rod 22 rotatably installed inside the filter screen 21, and a filter hole 211 is arranged inside the filter screen 21; a second telescopic rod 24 fixedly installed at the end of the first telescopic rod 22; a rotating fan blade 25 slidably installed on the outer wall of the second telescopic rod 24; a first spring 23 fixedly installed on the side wall of the end of the first telescopic rod 22, and the first spring 23 is concentric with the second telescopic rod 24.

[0033] It should be noted that when the pipeline is just flowing with water, it will carry a lot of impurities and water pressure to impact the pressure transmitter and filter, which will cause the detection data of the pressure transmitter to be unstable. Blockage may cause damage to the detection elements inside the pressure transmitter. In order to solve this problem, the following improvements have been made:

[0034] First, the transmitter body 1 is installed as a whole at the connection of the pipeline to be tested, and then the connecting bolt 13 is tightened with the pipeline thread through the interface. When the water pipe passes through the second connecting hole 14 and enters the interior of the connecting bolt 13, due to the high speed of water inside the pipeline, it will impact the filter 21 and the detection element of the transmitter body 1 when entering the interior of the connecting bolt 13. At this time, the interior of the second connecting hole 14 is provided with a rotating blade 25 and a first spring 23. The incoming water first impacts the rotating blade 25, thereby driving the rotating blade 25 to move toward the filter 21, and the side wall of the rotating blade 25 is provided with a second telescopic rod 24, which can play a buffering role when the water flow impacts the rotating blade 25, and when the water flow flows through the rotating blade 25, it can drive the rotating blade 25 to rotate, thereby intercepting impurities inside the pipeline, improving the safety of the transmitter body 1 and the filter 21, and preventing the filter 21 from being blocked and the data instability caused by the water pressure impacting the transmitter body 1 and the filter 21.

[0035] Please pay attention to Figure 3 In the structure shown, the pressure reducing device 2 also includes: a plurality of baffle blades 26 fixedly mounted on the side wall of the rotating fan blade 25, wherein a torsion spring is arranged inside each of the baffle blades 26, and the radius of the baffle blades 26 is the same as the radius of the second connecting hole 14.

[0036] It should be noted that, considering that the rotating blades 25 can reduce the pressure generated when the water is just connected and transported through the pipeline, the contact area between the rotating blades 25 and the water is still small, and the impact force generated by the instantaneous water pressure cannot be greatly reduced. Therefore, a plurality of baffle blades 26 are provided on the side wall of the rotating blades 25, and a torsion spring is provided inside the plurality of baffle blades 26, so that the baffle blades 26 are maintained in a normal state, such as Figure 3 When the rotating blade 25 is subjected to the water pressure shock and rotates rapidly, it can be transformed into the state as follows Figure 5 In the state shown, the plurality of baffle blades 26 are unfolded, thereby reducing the instantaneous water pressure impact force, and each baffle blade 26 is connected in sequence to ensure that the baffle blade 26 can be fully opened when the rotating fan blade 25 rotates rapidly, and when the water flow rate is normal, it is restored as shown in FIG. Figure 3 status.

[0037] Please pay attention to Figure 5 In the structure shown, the pressure reducing device 2 further includes: a blade groove 261 arranged inside the baffle blade 26, and a plurality of protrusions are arranged between the baffle blades 26.

[0038] It should be noted that, when the barrier blades 26 are deployed to block the impact of water pressure, the transported water may carry a large amount of impurities, which may impact the barrier blades 26. Therefore, blade grooves 261 are provided on the barrier blades 26 to block the impurities in the water and prevent the impurities from directly contacting the filter 21 and causing the filter 21 to be blocked. Moreover, protrusions are provided between the barrier blades 26, so that the barrier blades 26 can be deployed in sequence under the drive of the rotating blades 25, thereby maintaining the barrier blades 26 to intercept impurities and reduce the impact of water pressure.

[0039] Please pay attention to Figure 5 , Figure 6 , Figure 7 In the structure shown, a cleaning device 3 is provided at the end of the first telescopic rod 22, and the cleaning device 3 includes: a reciprocating screw 31 fixedly mounted on the top end of the first telescopic rod 22; an extrusion cleaning plate 34 movably mounted on the outside of the reciprocating screw 31; an extrusion block 35 fixedly mounted on the side wall of the extrusion cleaning plate 34; and a top blocking block 33 fixedly mounted on the top end of the reciprocating screw 31.

[0040] It should be noted that, considering that the filter 21 may still be affected by impurities in the pipeline and cause blockage during continuous use, an extrusion cleaning plate 34 and an extrusion block 35 are provided on the outer wall of the reciprocating screw 31, and regular filter holes 211 are opened on the filter 21. When the rotating fan blades 25 rotate and drive the first telescopic rod 22 and the reciprocating screw 31 to rotate rapidly, the extrusion cleaning plate 34 can be driven to move to a position close to the filter 21, and the side wall of the extrusion cleaning plate 34 is provided with an extrusion block 35, which can be combined with the filter hole 211, so as to remove impurities inside the filter hole 211, prevent the filter 21 from being blocked, and improve the service life and effect of the filter 21, and the top blocking block 33 limits the extrusion cleaning plate 34.

[0041] Please pay attention to Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 The structure shown in the figure, the cleaning device 3 also includes: a slip ring 37 slidably mounted on the outer wall of the reciprocating screw 31, the outer wall of the slip ring 37 is fixedly mounted on the extrusion cleaning plate 34; a transmission nut ring 36 threadedly mounted on the outer wall of the reciprocating screw 31, the transmission nut ring 36 is concentric with the slip ring 37, and the slip ring 37 is movably mounted inside the transmission nut ring 36, and the side wall of the slip ring 37 is fixedly mounted with a limiting protrusion 371; a sawtooth 361 is arranged inside the transmission nut ring 36, and the slip ring 37 slides on the side wall of the sawtooth 361; a second spring 32 rotatably mounted on the side wall of the filter screen 21, the second spring 32 is concentric with the reciprocating screw 31, and a spring is arranged inside the transmission nut ring 36 to lift the slip ring 37.

[0042] It should be noted that, considering that the rotation of the reciprocating screw 31 can drive the extrusion cleaning plate 34 to clean the filter hole 211 inside the filter screen 21, a transmission nut ring 36 and a slip ring 37 are provided on the outer wall of the reciprocating screw 31. Under normal conditions, the spring inside the transmission nut ring 36 lifts the slip ring 37, and the side wall of the slip ring 37 is provided with a limiting protrusion 371, which slides on the outer wall of the sawtooth 361, and the lower end outer wall of the slip ring 37 is fixedly installed on the side wall of the extrusion cleaning plate 34. Therefore, the rotation of the reciprocating screw 31 drives the transmission nut ring 36 to rise and fall, thereby driving the extrusion cleaning plate The second spring 32 and the transmission nut ring 36 cooperate with each other. When the transmission nut ring 36 drives the slip ring 37 to move to a position close to the filter screen 21, the second spring 32 lifts the slip ring 37, so that the limiting protrusion 371 is acted upon by the sawtooth 361 and adjusts a certain angle, thereby driving the extrusion cleaning plate 34 to rotate a certain angle. The extrusion cleaning plate 34 drives the extrusion block 35 to continuously clean the filter hole 211 on the filter screen 21, and continuously changes the angle during the cleaning process to prevent the filter screen 21 from being blocked.

[0043] Please pay attention to Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown in the structure, the cleaning device 3 also includes: a lifting limit ring 38 fixedly mounted on the outer wall of the transmission nut ring 36; a lifting limit rod 381 fixedly mounted on the side wall of the lifting limit ring 38, and the end of the lifting limit rod 381 slides inside the groove set on the inner wall of the second connecting hole 14.

[0044] It should be noted that, considering that the transmission nut ring 36 rises and falls under the action of the rotation of the reciprocating screw 31, it is necessary to limit the position of the transmission nut ring 36 to prevent the transmission nut ring 36 from rotating with the reciprocating screw 31 when the reciprocating screw 31 rotates. Therefore, a lifting limit ring 38 is provided on the outer wall of the transmission nut ring 36, and a lifting limit rod 381 is provided on the outer wall of the lifting limit ring 38. The lifting limit rod 381 slides inside the second connecting hole 14, thereby driving the transmission nut ring 36 to rise and fall during the rotation of the reciprocating screw 31.

[0045] Please pay attention to Figure 7In the structure shown, a striking device 4 is provided at the end of the top blocking block 33, and the striking device 4 includes: a first limit block 41 rotatably installed on the top of the top blocking block 33; a swing rod 43 rotatably installed inside the first limit block 41; a second limit block 42 fixedly installed on the side wall of the transmission nut ring 36; a slide groove 44 provided inside the swing rod 43, and the second limit block 42 slides inside the slide groove 44; and a gravity block 45 rotatably installed at the end of the swing rod 43.

[0046] It should be noted that, considering that impurities may adhere to the outer wall of the extrusion block 35 when the extrusion cleaning plate 34 and the extrusion block 35 continue to clean the filter holes 211 on the filter screen 21, a swing rod 43 and a gravity block 45 are provided. When the transmission nut ring 36 is raised or lowered, the gravity block 45 is driven to rise or fall, thereby knocking on the surface of the extrusion cleaning plate 34, maintaining a certain cleanliness of the extrusion cleaning plate 34 and the extrusion block 35, and the knocking of the gravity block 45 is relatively light, which will not affect the detection effect of the transmitter body 1 during use.

[0047] Please pay attention to Figure 7 In the structure shown, the radius of the extrusion cleaning plate 34 is the same as the radius of the second connecting hole 14 , and the diameter of the extrusion block 35 is the same as the diameter of the filtering hole 211 .

[0048] It should be noted that the radius of the extrusion cleaning plate 34 is the same as the radius of the second connecting hole 14, so that when cleaning the filter holes 211, the extrusion cleaning plate 34 can cover the position of each filter hole 211 on the filter mesh 21, and the diameter of the extrusion block 35 is the same as the diameter of the filter hole 211, so that the extrusion block 35 can fit the filter hole 211, thereby ejecting impurities inside the filter hole 211.

[0049] Please pay attention to Figure 3 , Figure 7 In the structure shown, the length of the swing rod 43 is smaller than the radius of the second connecting hole 14 .

[0050] It should be noted that the length of the swing rod 43 is smaller than the radius of the second connecting hole 14 , so that when the swing rod 43 is fully unfolded, it will not affect the lifting and lowering of the transmission nut ring 36 .

[0051] Please pay attention to Figure 5 In the structure shown, when the plurality of barrier blades 26 are fully unfolded, the circle enclosed by the plurality of barrier blades 26 has the same diameter as the second connecting hole 14 .

[0052] It should be noted that when the plurality of barrier blades 26 are fully deployed, the circle formed by the plurality of barrier blades 26 is the same as the diameter of the second connection hole 14, so that when the barrier blades 26 are fully deployed, the impact force of the water flow during connection can be blocked.

[0053] The above describes an embodiment of the present embodiment, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, all of which are within the protection of the present embodiment.

Claims

1. A pressure transmitter with high safety, comprising a transmitter body (1), characterized in that: The outer wall of the transmitter body (1) is fixedly mounted with a transmitter tube (11); a tightening nut (12) is threadedly mounted on the end of the transmitter tube (11); a connecting bolt (13) is threadedly mounted inside the tightening nut (12); a first vent hole (121) and a second connecting hole (14) are respectively arranged inside the tightening nut (12) and the connecting bolt (13); the first vent hole (121) and the second connecting hole (14) are communicated; the first vent hole (121) is communicated with the transmitter body (1); a filter screen (21) is fixedly mounted on the inner wall of the second connecting hole (14); a pressure reducing device (2) is arranged inside the second connecting hole (14); the pressure reducing device (2) comprises: A first telescopic rod (22) is rotatably mounted inside the filter screen (21), wherein a filter hole (211) is provided inside the filter screen (21); A second telescopic rod (24) fixedly mounted on the end of the first telescopic rod (22); A rotating fan blade (25) slidably mounted on the outer wall of the second telescopic rod (24); A first spring (23) is fixedly mounted on a side wall of an end portion of the first telescopic rod (22), wherein the first spring (23) is concentric with the second telescopic rod (24).

2. A pressure transmitter with high safety according to claim 1, characterized in that: The pressure reducing device (2) further comprises: A plurality of baffle blades (26) are fixedly mounted on the side wall of the rotating blade (25), each baffle blade (26) being provided with a torsion spring inside, and the radius of the baffle blade (26) being the same as the radius of the second connecting hole (14).

3. A pressure transmitter with high safety according to claim 2, characterized in that: The pressure reducing device (2) further comprises: A blade groove (261) is arranged inside the barrier blade (26), and a protrusion is arranged between the plurality of barrier blades (26).

4. A pressure transmitter with high safety according to claim 3, characterized in that: A cleaning device (3) is provided at the end of the first telescopic rod (22), and the cleaning device (3) comprises: A reciprocating screw rod (31) fixedly mounted on the top end of the first telescopic rod (22); An extrusion cleaning plate (34) movably mounted outside the reciprocating screw (31); An extrusion block (35) fixedly mounted on the side wall of the extrusion cleaning plate (34); A top stopper (33) is fixedly mounted on the top end of the reciprocating screw (31).

5. A pressure transmitter with high safety according to claim 4, characterized in that: The cleaning device (3) further comprises: A slip ring (37) slidably mounted on the outer wall of the reciprocating screw (31), wherein the outer wall of the slip ring (37) is fixedly mounted to the extrusion cleaning plate (34); A transmission nut ring (36) is threadedly mounted on the outer wall of the reciprocating screw (31), the transmission nut ring (36) is concentric with the slip ring (37), and the slip ring (37) is movably mounted inside the transmission nut ring (36), and a limiting protrusion (371) is fixedly mounted on the side wall of the slip ring (37); A sawtooth (361) is arranged inside the transmission nut ring (36), and the slip ring (37) slides on the side wall of the sawtooth (361); A second spring (32) is rotatably mounted on the side wall of the filter screen (21), wherein the second spring (32) is concentric with the reciprocating screw (31), and a spring is arranged inside the transmission nut ring (36) for lifting the slip ring (37).

6. A pressure transmitter with high safety according to claim 5, characterized in that: The cleaning device (3) further comprises: A lifting limit ring (38) fixedly mounted on the outer wall of the transmission nut ring (36); A lifting limit rod (381) is fixedly mounted on the side wall of the lifting limit ring (38), and an end of the lifting limit rod (381) slides inside a groove provided on the inner wall of the second connecting hole (14).

7. A pressure transmitter with high safety according to claim 6, characterized in that: A striking device (4) is provided at the end of the top blocking block (33), and the striking device (4) comprises: A first limiting block (41) rotatably mounted on the top of the top blocking block (33); Rotating a swing rod (43) installed inside the first limiting block (41); A second limiting block (42) fixedly mounted on the side wall of the transmission nut ring (36); A slide groove (44) is arranged inside the swing rod (43), and the second limit block (42) slides inside the slide groove (44); The gravity block (45) mounted on the end of the swing rod (43) is rotatably mounted.

8. A pressure transmitter with high safety according to claim 7, characterized in that: The radius of the extrusion cleaning plate (34) is the same as the radius of the second connecting hole (14), and the diameter of the extrusion block (35) is the same as the diameter of the filtering hole (211).

9. A pressure transmitter with high safety according to claim 8, characterized in that: The length of the swing rod (43) is smaller than the radius of the second connecting hole (14).

10. A pressure transmitter with high safety according to claim 9, characterized in that: When the plurality of barrier blades (26) are fully unfolded, the circle formed by the plurality of barrier blades (26) has the same diameter as the second connecting hole (14).

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