CN221224063U - Differential pressure transmitter - Google Patents
Differential pressure transmitter Download PDFInfo
- Publication number
- CN221224063U CN221224063U CN202323358303.4U CN202323358303U CN221224063U CN 221224063 U CN221224063 U CN 221224063U CN 202323358303 U CN202323358303 U CN 202323358303U CN 221224063 U CN221224063 U CN 221224063U
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- pressure
- ring
- mandrel
- cavity
- magnetic block
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- 239000007788 liquid Substances 0.000 claims abstract description 30
- 238000000926 separation method Methods 0.000 claims abstract description 16
- 230000006698 induction Effects 0.000 claims abstract description 12
- 238000013016 damping Methods 0.000 claims description 16
- 239000000428 dust Substances 0.000 claims description 6
- 230000011664 signaling Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract description 7
- 238000007789 sealing Methods 0.000 description 8
- 238000001914 filtration Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model discloses a differential pressure transmitter, which comprises a shell, a mandrel and an indicating ring, wherein the two ends of the shell are respectively provided with a guide post and a liquid collecting cavity, the mandrel is slidably arranged in the liquid collecting cavity, and the indicating ring is slidably sleeved on the guide post; the mandrel is integrally provided with a separation block, and the liquid collecting cavity is separated into a high-pressure cavity and a low-pressure cavity which are mutually independent by the separation block; the indication ring is embedded with an induction magnetic block, the mandrel is provided with a driving magnetic block, and the polarities of the induction magnetic block and the driving magnetic block are the same. When the pressure difference between the high-pressure cavity and the low-pressure cavity is increased, the driving magnetic block moves along with the mandrel in the direction away from the high-pressure cavity synchronously, and the driving magnetic block pushes the indication ring to move in the opposite direction through the induction magnetic block. The utility model utilizes the principle of homopolar repulsion of the magnets to control the indicating ring to intuitively display the blocking condition of the filter, solves the problem that the existing differential pressure transmitter cannot alarm in time due to the failure of an electrical element, and ensures that the differential pressure transmitter works more reliably.
Description
Technical Field
The utility model relates to the technical field of pressure detection, in particular to a differential pressure transmitter.
Background
The differential pressure transmitter is usually arranged on the filter, and after the filter works for a period of time, dust and other impurities in the air easily cause the blockage of a filter element of the filter, so that the differential pressure on two sides of the filter element is increased, and the more serious the blockage is, the larger the differential pressure is; when the pressure difference reaches a certain degree, the filter element is damaged, so that the filtering function of the filter element is invalid, and the subsequent equipment is polluted. In order to avoid the occurrence of the situation, a differential pressure transmitter is arranged on the filter, and when the differential pressure at two ends of the filter reaches a certain set value, the differential pressure transmitter transmits an electric signal and visual indication to remind a user to replace the filter element in time. Therefore, it is particularly necessary to optimize the structure of the differential pressure transmitter.
The existing differential pressure transmitter utilizes magnetic attraction linkage of the magnetic blocks to trigger the micro switch, and the micro switch is connected with an external alarm circuit to send out alarm indication. However, the method is not visual enough, the pollution condition of the filter element cannot be known in time, and the alarm can be triggered only when the blockage approaches the critical value. When the micro switch is triggered poorly or an external alarm circuit is damaged, the alarm cannot be given, so that the pressure difference transmitter works unreliably.
Disclosure of utility model
The utility model aims to provide a differential pressure transmitter, which utilizes the principle that like poles of magnets repel each other to control an indicating ring to move, intuitively displays the blocking condition of a filter and solves the problem that the traditional differential pressure transmitter cannot give an alarm in time due to the failure of an electrical element.
In order to achieve the above purpose, the utility model provides a differential pressure transmitter, which comprises a shell, a mandrel and an indicating ring, wherein the two ends of the shell are respectively provided with a guide post and a liquid collecting cavity, the mandrel is slidably arranged in the liquid collecting cavity, and the indicating ring is slidably sleeved on the guide post; the mandrel is integrally provided with a separation block, and the liquid collecting cavity is separated into a high-pressure cavity and a low-pressure cavity which are mutually independent by the separation block; the indication ring is embedded with an induction magnetic block, the mandrel is provided with a driving magnetic block, and the polarities of the induction magnetic block and the driving magnetic block are the same;
When the pressure difference between the high-pressure cavity and the low-pressure cavity is increased, the driving magnetic block moves along with the mandrel in the direction away from the high-pressure cavity synchronously, and the driving magnetic block pushes the indication ring to move in the opposite direction through the induction magnetic block.
Preferably, the display device further comprises a transparent cover which covers the outside of the indication ring and is fixedly arranged on the shell.
Preferably, the device further comprises a cap fixedly arranged at one end of the transparent cover far away from the shell; the joint of the cap and the transparent cover is connected in lap joint.
Preferably, the open end of the cap is integrally provided with an extension edge, one end of the transparent cover, which is far away from the shell, is integrally provided with a lap joint edge, and the extension edge and the lap joint edge are overlapped in the radial direction.
Preferably, one end of the cap far away from the transparent cover is provided with a mounting groove, the bottom of the mounting groove is penetrated with a locking screw, the locking screw is fixedly connected with a connecting column of the shell, and the connecting column is integrally and coaxially arranged at the end part of the guide column.
Preferably, the notch of the mounting groove is fixedly provided with a dust cap.
Preferably, the indicator ring comprises at least two indicator rings arranged coaxially stacked, the color of all indicator rings being progressively lighter in the direction of movement along the indicator ring.
Preferably, the housing is formed with a support boss for supporting the indicator ring, and the guide post and the support boss are coaxially and integrally connected.
Preferably, the low-pressure cavity is internally provided with an adjusting ring and an elastic piece, the adjusting ring is in threaded connection with the low-pressure cavity, two ends of the elastic piece are respectively propped against the adjusting ring and the mandrel, and the adjusting ring is used for adjusting acting force applied to the mandrel by the elastic piece.
Preferably, the inlet of the liquid collecting cavity is a low-pressure inlet, a low-pressure damping hole is formed in the center of the adjusting ring, and the low-pressure inlet and the low-pressure cavity are communicated through the low-pressure damping hole; the side wall of the shell is provided with a high-pressure inlet and a high-pressure damping hole, and the high-pressure inlet is communicated with the high-pressure cavity through the high-pressure damping hole.
Compared with the background technology, the differential pressure signaling device provided by the utility model comprises a shell, a mandrel and an indicating ring, wherein the two ends of the shell are respectively provided with a guide post and a liquid collecting cavity, the mandrel is slidably arranged in the liquid collecting cavity, the mandrel is integrally provided with a separation block, and the liquid collecting cavity is separated into a high-pressure cavity and a low-pressure cavity which are mutually independent by the separation block, so that the mandrel can move in the liquid collecting cavity by means of the differential pressure between the high-pressure cavity and the low-pressure cavity. The guide post is located to the slidable cover of instruction ring, and the instruction ring inlays and is equipped with the response magnetic path, and the dabber is equipped with the drive magnetic path, and the polarity of response magnetic path and drive magnetic path is the same.
When the filter core of the filter is blocked, the pressure difference between the high-pressure cavity and the low-pressure cavity is increased, the driving magnetic block moves along with the mandrel in the direction away from the high-pressure cavity synchronously, and when the driving magnetic block passes through the sensing magnetic block, the sensing magnetic block pushes the indication ring to move in the opposite direction under the action of magnetic repulsive force, and the blocking condition of the filter can be intuitively known by observing the position of the indication ring.
The utility model utilizes the principle of homopolar repulsion of the magnets to control the indicating ring to intuitively display the blocking condition of the filter, solves the problem that the existing differential pressure transmitter cannot alarm in time due to the failure of an electrical element, and ensures that the differential pressure transmitter works more reliably.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a differential pressure transmitter according to an embodiment of the present utility model.
The reference numerals are as follows:
A housing 1, a mandrel 2, an indicator ring 3, a transparent cover 4, a cap 5, an adjusting ring 6 and an elastic member 7;
the device comprises a guide column 11, a liquid collecting cavity 12, a connecting column 13, a supporting boss 14, a low-pressure inlet 15, a high-pressure inlet 16, a high-pressure damping hole 17, a sealing ring 18 and a rotary handle 19;
A high pressure chamber 121 and a low pressure chamber 122;
A separation block 21, a driving magnet 22 and a sealing member 23;
an induction magnet 31 and an indication color ring 32;
a landing edge 41 and an inner stop ring 42;
An extension 51, a mounting groove 52, a locking screw 53 and a dust cap 54;
the low pressure damping orifice 61.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In order that those skilled in the art will better understand the present utility model, the following description will be given in detail with reference to the accompanying drawings and specific embodiments.
The embodiment of the utility model discloses a differential pressure transmitter, which is shown in figure 1 and comprises a shell 1, a mandrel 2 and an indicating ring 3, wherein the surface of the shell 1 is provided with external threads, and the external threads are connected with ports of a filter or other filtering devices. In order to ensure the tightness of the joint, two ends of the external thread are respectively sleeved with a sealing ring 18, and the sealing rings 18 can be O-shaped sealing rings. The outer surface of the shell 1 is also integrally provided with a rotary handle 19, and the outer side surface of the rotary handle 19 is in a regular hexagon shape, so that the shell 1 can be conveniently rotated, and the shell 1 is connected with a port of a filter or other filtering devices.
The two ends of the shell 1 are respectively provided with a guide post 11 and a liquid collecting cavity 12. The plenum 12 is closed at one end and open at the other end, the plenum 12 being adapted to receive media fluid flowing through the filter. The mandrel 2 is slidably arranged in the liquid collecting cavity 12, one end of the mandrel 2 is integrally provided with a separation block 21, the diameter of the separation block 21 is close to the inner diameter of the liquid collecting cavity 12, the liquid collecting cavity 12 is separated into a high-pressure cavity 121 and a low-pressure cavity 122 which are mutually independent by the separation block 21, and the low-pressure cavity 122 is close to the open end of the liquid collecting cavity 12, so that the mandrel 2 moves in the liquid collecting cavity 12 by means of the pressure difference between the high-pressure cavity 121 and the low-pressure cavity 122. In order to ensure that the high-pressure cavity 121 and the low-pressure cavity 122 are not communicated, the surface of the separation block 21 is sleeved with a sealing piece 23, the sealing piece 23 abuts against the inner wall of the liquid collecting cavity 12, a gap between the separation block 21 and the liquid collecting cavity 12 is sealed, and the high-pressure cavity 121 and the low-pressure cavity 122 are prevented from being communicated, so that the pressure difference between the high-pressure cavity 121 and the low-pressure cavity 122 is too small. The surface of the separation block 21 is provided with an annular groove, and the sealing member 23 is specifically an O-ring 18 mounted in the annular groove. It should be noted that the end of the mandrel 2 far away from the separating block 21 is conical and is matched with the conical groove arranged at the closed end of the liquid collecting cavity 12, so that the coaxiality between the mandrel 2 and the liquid collecting cavity 12 with higher precision is ensured, and the repeated assembly precision between the mandrel 2 and the liquid collecting cavity 12 is ensured to be unchanged.
The indication ring 3 is slidably sleeved on the guide post 11 and can slide up and down along the guide post 11. The indication ring 3 is embedded with an induction magnetic block 31, the mandrel 2 is provided with a driving magnetic block 22, and the polarities of the induction magnetic block 31 and the driving magnetic block 22 are the same. Specifically, the driving magnetic block 22 is in a ring shape and is fixedly arranged at one end of the mandrel 2 far away from the separation block 21.
When the filter core of the filter is blocked, the pressure difference between the high-pressure cavity 121 and the low-pressure cavity 122 is increased, the driving magnetic block 22 moves along with the mandrel 2 in a direction away from the high-pressure cavity 121 (namely downward movement), and when the driving magnetic block 22 passes the sensing magnetic block 31, the sensing magnetic block 31 pushes the indicating ring 3 to move in the opposite direction (namely upward movement) under the action of magnetic repulsive force, and the blocking condition of the filter can be intuitively known by observing the position of the indicating ring 3.
The utility model utilizes the principle of homopolar repulsion of the magnets to control the indicating ring 3 to intuitively display the blocking condition of the filter, solves the problem that the traditional differential pressure transmitter cannot alarm in time due to the failure of an electrical element, and ensures that the differential pressure transmitter works more reliably.
The differential pressure transmitter further comprises a transparent cover 4 covered outside the indicating ring 3, so that the indicating ring 3 can be protected from being interfered by the outside to slide smoothly, and the moving position of the indicating ring 3 can be observed conveniently and intuitively. One end of the transparent cover 4 abuts against the end face of the rotary handle 19, and the transparent cover 4 is fixedly connected with the housing 1 by means of the cap 5.
The differential pressure transmitter further comprises a cap 5 fixedly arranged at one end, far away from the shell 1, of the transparent cover 4, and the cap 5 and the transparent cover 4 are in split type design, so that the indicating ring 3 is convenient to disassemble and assemble. The opposite ends of the cap 5 and the transparent cover 4 enclose a sliding cavity in which the indicator ring 3 slides.
It should be noted that the inner wall of the transparent cover 4 is fixedly provided with an inner baffle ring 42, the inner baffle ring 42 is an opaque plate, and the inner baffle ring 42 is provided with a viewing window, so that the moving position of the indicating ring 3 can be conveniently and intuitively observed. When the filter element of the filter is not blocked, the indicating ring 3 is positioned down, and the window is white. When the filter element of the filter is seriously blocked, the indicating ring 3 moves upwards, and the window is red to remind the user to replace the filter element.
The joint between the cap 5 and the transparent cover 4 is connected in an overlapping manner, but the present invention is not limited thereto, and an interference connection, a screw connection, or the like may be used. Specifically, the open end of the cap 5 is integrally provided with an extension edge 51, and the end of the transparent cover 4 remote from the housing 1 is integrally provided with a lap edge 41, both the extension edge 51 and the lap edge 41 extending in the axial direction and overlapping in the radial direction. The sum of the thicknesses of the extension edge 51 and the overlap edge 41 is equal to the thickness of the transparent cover 4, ensuring a smooth engagement of the junction of the cap 5 and the transparent cover 4.
One end of the cap 5 far away from the transparent cover 4 is provided with a mounting groove 52, the bottom of the mounting groove 52 is penetrated with a locking screw 53, the locking screw 53 is fixedly connected with the connecting column 13 of the shell 1, and the connecting column 13 is integrally and coaxially arranged at the end part of the guide column 11. Of course, the connection manner between the cap 5 and the housing 1 is not limited thereto. The notch of the mounting groove 52 is fixedly provided with a dust cap 54, so that foreign matters such as dust can be prevented from entering the sliding cavity along the mounting groove 52 to influence the smooth sliding of the indicating ring 3.
The indicator ring 3 comprises at least two indicator rings 32 arranged coaxially one above the other, the color of all indicator rings 32 becoming progressively lighter in the direction of movement along the indicator ring 3, i.e. the more upward the position the lighter the color of the indicator ring 32. When the indicating ring 3 moves upwards, the darker the color indicates that the color ring 32 is positioned at a higher position, which means that the pressure difference in the two ends of the filter is larger, the more serious the blocking of the transition device is, so that the pressure difference in the two ends of the filter can be conveniently and intuitively known, and early warning information can be sent more accurately. Specifically, the indicating ring 3 includes an upper indicating ring and a lower indicating ring which are stacked, the sensing magnet 31 is annular and is disposed between the upper indicating ring and the lower indicating ring, the upper indicating ring is located above the lower indicating ring, the upper indicating ring is white, and the lower indicating ring is red.
The housing 1 is formed with a support boss 14 for supporting the indicator ring 3, and can define the limit position of the indicator ring 3. The guide post 11 is coaxially and integrally connected to the support boss 14, and the diameter of the guide post 11 is smaller than that of the support boss 14.
The low pressure chamber 122 is internally provided with an adjusting ring 6 and an elastic piece 7, the adjusting ring 6 is in threaded connection with the low pressure chamber 122, and the position of the adjusting ring 6 in the low pressure chamber 122 can be adjusted by rotating the adjusting ring 6. The two ends of the elastic piece 7 are respectively propped against the adjusting ring 6 and the mandrel 2, and the adjusting ring 6 is used for adjusting the acting force applied to the mandrel 2 by the elastic piece 7, so as to adjust the sensitivity of the mandrel 2. The elastic member 7 may be, but not limited to, a general cylindrical spring.
The inlet of the liquid collecting cavity 12 is a low pressure inlet 15, a low pressure damping hole 61 is formed in the center of the adjusting ring 6, and the low pressure inlet 15 and the low pressure cavity 122 are communicated through the low pressure damping hole 61. The side wall of the shell 1 is provided with a high-pressure inlet 16 and a high-pressure damping hole 17, and the high-pressure inlet 16 and the high-pressure cavity 121 are communicated through the high-pressure damping hole 17. The high pressure inlet 16 communicates with the filter upstream of the filter cartridge and the low pressure inlet 15 communicates with the filter downstream of the filter cartridge. The low-pressure damping holes 61 and the high-pressure damping holes 17 can eliminate the pressure difference increase caused by the viscosity increase of the medium liquid at the upstream and downstream of the filter element, eliminate pressure impact and vibration, simplify the pressure conduction of the medium, and avoid the pressure difference caused by the viscosity increase at low temperature of the liquid medium bag from giving out false alarm warning to the pressure difference transmitter.
It should be noted that in this specification relational terms such as first and second are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (10)
1. The differential pressure transmitter is characterized by comprising a shell (1) with guide posts (11) and a liquid collecting cavity (12) at two ends, a mandrel (2) slidably arranged in the liquid collecting cavity (12) and an indicating ring (3) slidably sleeved on the guide posts (11); the mandrel (2) is integrally provided with a separation block (21), and the liquid collecting cavity (12) is separated into a high-pressure cavity (121) and a low-pressure cavity (122) which are mutually independent by the separation block (21); the indication ring (3) is embedded with an induction magnetic block (31), the mandrel (2) is provided with a driving magnetic block (22), and the polarities of the induction magnetic block (31) and the driving magnetic block (22) are the same;
When the pressure difference between the high-pressure cavity (121) and the low-pressure cavity (122) is increased, the driving magnetic block (22) moves along with the mandrel (2) in a direction away from the high-pressure cavity (121) synchronously, and the driving magnetic block (22) pushes the indicating ring (3) to move in the opposite direction through the induction magnetic block (31).
2. The differential signaling apparatus of claim 1, further comprising a transparent cover (4) covering the indicator ring (3) and fixedly attached to the housing (1).
3. The differential pressure transmitter as claimed in claim 2, further comprising a cap (5) fixedly arranged at one end of the transparent cover (4) far away from the housing (1); the joint of the cap (5) and the transparent cover (4) is in lap joint.
4. A differential pressure transmitter as claimed in claim 3, wherein the open end of the cap (5) is integrally provided with an extension edge (51), the end of the transparent cover (4) remote from the housing (1) is integrally provided with a bridging edge (41), and the extension edge (51) and the bridging edge (41) are radially overlapped.
5. A differential pressure transmitter according to claim 3, characterized in that one end of the cap (5) far away from the transparent cover (4) is provided with a mounting groove (52), a locking screw (53) is arranged at the bottom of the mounting groove (52) in a penetrating manner, the locking screw (53) is fixedly connected with a connecting column (13) of the shell (1), and the connecting column (13) is integrally and coaxially arranged at the end part of the guide column (11).
6. The differential signaling apparatus of claim 5, wherein the notch of said mounting groove (52) is fixedly provided with a dust cap (54).
7. Differential pressure transmitter according to any of claims 1 to 6, characterized in that the indicator ring (3) comprises at least two coaxially stacked indicator rings (32), the color of all the indicator rings (32) becoming progressively lighter in the direction of movement along the indicator ring (3).
8. Differential pressure transmitter according to any of claims 1 to 6, characterized in that the housing (1) is formed with a support boss (14) for supporting the indicator ring (3), the guide post (11) being connected coaxially and integrally with the support boss (14).
9. Differential pressure transmitter according to any of claims 1 to 6, characterized in that the low pressure chamber (122) is provided with an adjusting ring (6) and an elastic member (7), the adjusting ring (6) is in threaded connection with the low pressure chamber (122), two ends of the elastic member (7) are respectively abutted against the adjusting ring (6) and the mandrel (2), and the adjusting ring (6) is used for adjusting the acting force applied to the mandrel (2) by the elastic member (7).
10. The differential pressure transmitter as claimed in claim 9, wherein the inlet of the liquid collecting cavity (12) is a low pressure inlet (15), a low pressure damping hole (61) is formed at the center of the adjusting ring (6), and the low pressure inlet (15) and the low pressure cavity (122) are communicated through the low pressure damping hole (61); the side wall of the shell (1) is provided with a high-pressure inlet (16) and a high-pressure damping hole (17), and the high-pressure inlet (16) and the high-pressure cavity (121) are communicated through the high-pressure damping hole (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323358303.4U CN221224063U (en) | 2023-12-08 | 2023-12-08 | Differential pressure transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323358303.4U CN221224063U (en) | 2023-12-08 | 2023-12-08 | Differential pressure transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221224063U true CN221224063U (en) | 2024-06-25 |
Family
ID=91548744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323358303.4U Active CN221224063U (en) | 2023-12-08 | 2023-12-08 | Differential pressure transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221224063U (en) |
-
2023
- 2023-12-08 CN CN202323358303.4U patent/CN221224063U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |