CN219319641U

CN219319641U - Liquid-free flange diaphragm pressure gauge

Info

Publication number: CN219319641U
Application number: CN202320416176.XU
Authority: CN
Inventors: 邢春生; 俞磊; 高冀东
Original assignee: Beijing Brighty Instrument Co ltd
Current assignee: Beijing Brighty Instrument Co ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-07-07
Anticipated expiration: 2033-02-28

Abstract

The utility model discloses a liquid-free flange diaphragm pressure gauge, which belongs to the technical field of pressure measuring instruments and comprises a gauge head and a flange, wherein the gauge head and the flange are connected through a supporting rod, a movement is arranged in the gauge head, an elastic diaphragm is arranged on the flange, and the elastic diaphragm is connected with the movement through a connecting rod. The liquid-free flange diaphragm pressure gauge provided by the utility model avoids the pollution of a measured medium caused by the damage of an elastic diaphragm, ensures the purity of the measured medium and the safety of a special measuring medium, can be applied to extremely low or extremely high temperature, and expands the application range.

Description

Liquid-free flange diaphragm pressure gauge

Technical Field

The utility model relates to the technical field of pressure measuring instruments, in particular to a liquid-free flange diaphragm pressure gauge.

Background

In the prior art, a flange diaphragm pressure gauge generally comprises a Bowden tube 01, a core 02, a joint 03, a flange 04, a diaphragm 05 and a filling liquid 06, and as shown in fig. 1, pressure conduction is realized by conducting pressure to the filling liquid 06 in the inner cavity of the pressure gauge so as to monitor pipeline pressure by the instrument.

When the diaphragm pressure gauge is used, the diaphragm pressure gauge is firmly connected with a pressure device to be measured and is sealed and does not leak, after the pressure of the pressure working medium acts on the lower part of the diaphragm 05, the diaphragm 05 generates upward deformation, the filling liquid 06 transfers the pressure to be measured to the Bowden tube 01, the Bowden tube 01 generates elastic deformation to cause the tube end displacement, the pull rod drives the gear transmission mechanism to amplify the displacement, simultaneously drives the pointer to rotate, and the measured pressure value is indicated on the index plate carved with legal measuring units. The diaphragm 05 is formed by processing a metal diaphragm with the thickness of 0.05-0.1 mm, has no loss in order to sensitively transmit pressure in order to sense pressure, is thin in material, is easily influenced by external force or is easily corroded by media to crack, and causes filling liquid 06 in the instrument to enter a measured medium in a measuring pipeline or a tank body to pollute the measured medium. Some of the test media encounter oily filling fluid 06 and may undergo severe chemical reactions. Meanwhile, the filling liquid 06 expands with heat and contracts with cold, internal pressure is generated in the instrument, so that the measurement pressure indication is inaccurate, and the accuracy is reduced. And the filling liquid 06 may be viscous, solidify or freeze at very low temperatures and expand, gasify or deteriorate at high temperatures, which may result in the flange diaphragm gauge not being able to measure very low or very high temperatures.

Disclosure of Invention

In view of the above, the utility model provides a liquid-free flange diaphragm pressure gauge, which avoids the pollution of a measured medium caused by the damage of an elastic diaphragm, ensures the purity of the measured medium and the safety of a special measuring medium, can be applied to extremely low or extremely high temperature, and expands the application range.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a no liquid flange diaphragm manometer, includes gauge outfit and flange that passes through branch connection, be provided with the core in the gauge outfit, be provided with the elastic diaphragm on the flange, the elastic diaphragm with the core passes through the connecting rod and connects.

Optionally, the flange is provided with a first through hole and a pressure measuring cavity in axial communication, the support rod is provided with a second through hole in axial communication, and the first through hole and the second through hole are correspondingly arranged in communication;

the elastic diaphragm is connected with one end of the pressure measuring cavity, which is far away from the first through hole, in a sealing way.

Optionally, the connecting rod is fixedly connected with the elastic membrane through a first connecting structure;

the first connecting structure is connected with the central position of the elastic membrane.

Optionally, the first connecting structure includes threaded connection's pole connecting seat and diaphragm connecting seat, the pole connecting seat keep away from the one end of diaphragm connecting seat with connecting rod fixed connection, the diaphragm connecting seat keep away from the one end of pole connecting seat with elastic membrane fixed connection.

Optionally, one end of the connecting rod, which is far away from the elastic membrane, is rotationally connected with the movement through a first connecting piece.

Optionally, the elastic membrane has a thickness of 0.1-1mm.

Optionally, the elastic membrane is a nichrome sheet;

the elastic membrane is a wavy membrane.

Optionally, the core includes first arm of force, second arm of force, sector gear and sun gear, the one end of first arm of force with the connecting rod rotates to be connected, the other end with the first end of second arm of force rotates to be connected, the second end of second arm of force with the handle end sliding connection of sector gear, the tooth end of sector gear with sun gear meshing, sun gear and pointer coaxial fixed connection drive the pointer and rotate.

Optionally, the diaphragm connecting seat comprises a first seat body, one end of the first seat body is provided with a connecting disc, and the other end of the first seat body is provided with a threaded column;

the connecting disc is fixedly connected with the elastic membrane, and the threaded column is in threaded connection with the rod connecting seat.

Optionally, the rod connecting seat comprises a second seat body, wherein one end of the second seat body is provided with a rod connecting hole, and the other end of the second seat body is provided with an internal threaded hole;

the rod connecting hole is fixedly connected with the connecting rod, and the internal threaded hole is in threaded connection with the diaphragm connecting seat.

According to the technical scheme, the liquid-free flange diaphragm pressure gauge provided by the utility model has the advantages that the elastic diaphragm generates upward (downward vacuum measurement) displacement according to different pressures after being pressed, the displacement generated by the elastic diaphragm is transmitted to the movement through the connecting rod, and the movement drives the pointer to rotate to indicate the measured pressure value. According to the liquid-free flange diaphragm pressure gauge, filling liquid is not needed, even if the elastic diaphragm is damaged, the situation that the filling liquid flows into a measured medium of a measuring pipeline or a tank body is avoided, the measured medium pollution caused by the damage of the elastic diaphragm is avoided, and the purity of the measured medium and the safety of a special measuring medium are ensured. Because the liquid-free flange diaphragm pressure gauge does not contain filling liquid in the gauge, but adopts the connecting rod to transfer pressure, compared with the flange diaphragm pressure gauge in the prior art, the influence of temperature change on the precision of the measured value is reduced, the gauge can be applied to extremely low or extremely high temperature, the requirement of the pressure gauge on the temperature of the use environment is reduced, the temperature application range is wider, and the use range is enlarged.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a prior art flange diaphragm pressure gauge;

FIG. 2 is a schematic structural diagram of a liquid-free flange diaphragm pressure gauge according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of the gauge outfit of the liquid-free flange diaphragm pressure gauge provided by the embodiment of the utility model;

FIG. 4 is a schematic structural view of a flange according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a connecting rod and elastic membrane according to an embodiment of the present utility model;

FIG. 6 is a schematic view of another angle of connection between a connecting rod and an elastic membrane according to an embodiment of the present utility model;

fig. 7 is a schematic view of a partial enlarged structure of a portion a in fig. 5;

fig. 8 is a schematic structural diagram of a membrane connection seat according to an embodiment of the present utility model.

Wherein:

01. bowden tube 02, movement 03, joint 04, flange, 05, membrane 06, priming solution, flange,

101. a first through hole 102, a pressure measuring cavity 103 and a connecting through hole,

2. the supporting rod is provided with a plurality of supporting rods,

3. the pointer is used to indicate the position of the pointer,

4. the machine core is provided with a machine core,

401. a first moment arm, 402, a sun gear, 403, a sector gear, 404, a zeroing structure, 405, a second moment arm,

5. the connecting rod is provided with a connecting rod,

6. the gauge head is provided with a gauge head,

7. the elastic membrane is arranged on the inner side of the elastic membrane,

8. the first connecting piece is provided with a first connecting piece,

9. a rod connecting seat is arranged on the connecting seat,

10. a membrane connecting seat,

1001. screw thread post, 1002, first pedestal, 1003, connection pad.

Detailed Description

The utility model discloses a liquid-free flange diaphragm pressure gauge, which avoids the pollution of a measured medium caused by the damage of an elastic diaphragm, ensures the purity of the measured medium and the safety of a special measuring medium, can be applied to extremely low or extremely high temperature, and expands the application range.

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.

Referring to fig. 2 to 8, the liquid-free flange diaphragm pressure gauge of the present utility model includes a gauge head 6 and a flange 1 connected by a strut 2, a movement 4 is disposed in the gauge head 6, an elastic diaphragm 7 is disposed on the flange 1, and the elastic diaphragm 7 is connected with the movement 4 by a connecting rod 5.

The dial is arranged in the gauge outfit 6, and the pointer 3 is rotatably arranged on one side of the dial far away from the movement 4. The elastic diaphragm 7 is provided at the pressure detecting end of the flange 1.

According to the liquid-free flange diaphragm pressure gauge, after the elastic diaphragm 7 is pressed, upward (downward vacuum measurement) displacement is generated according to different pressures, the displacement generated by the elastic diaphragm 7 is transmitted to the movement 4 through the connecting rod 5, and the movement 4 drives the pointer 3 to rotate to indicate the measured pressure value. According to the liquid-free flange diaphragm pressure gauge, filling liquid is not needed, even if the elastic diaphragm 7 is damaged, the situation that the filling liquid flows into a measured medium of a measuring pipeline or a tank body is avoided, the measured medium pollution caused by the damage of the elastic diaphragm 7 is avoided, and the purity of the measured medium and the safety of a special measuring medium are ensured. As the liquid-free flange diaphragm pressure gauge does not contain filling liquid in the gauge, the connecting rod 5 is used for transmitting pressure, compared with the flange diaphragm pressure gauge in the prior art, the influence of temperature change on the precision of measured values is reduced, the gauge can be applied to extremely low or extremely high temperature, and the application range is enlarged.

In order to realize the connection between the connecting rod 5 and the elastic membrane 7 and between the connecting rod and the movement 4, the flange 1 is provided with a first through hole 101 and a pressure measuring cavity 102 in axial communication, and as shown in fig. 4, the support rod 2 is provided with a second through hole in axial direction, and the first through hole 101 is correspondingly provided in communication with the second through hole. The connecting rod 5 penetrates the first through hole 101 and the second through hole, one end of the connecting rod is connected with the movement 4, and the other end of the connecting rod is fixedly connected with the elastic membrane 7. The elastic diaphragm 7 is connected to the end of the pressure measuring chamber 102 far from the first through hole 101 in a sealing manner. The elastic membrane 7 is an elastic element, and the elastic membrane 7 is welded at the edge of the pressure measuring cavity 102, and may be connected by other connection manners commonly used by those skilled in the art, which is not limited herein. In order to facilitate the fixed installation of the flueless flange diaphragm pressure gauge of the present utility model, the edge of the flange 1 is provided with at least two connecting through holes 103, as shown in fig. 4, a plurality of connecting through holes 103 are uniformly distributed on the edge of the flange 1. It is understood that a plurality herein refers to two and more.

Specifically, the connecting rod 5 is fixedly connected with the elastic membrane 7 through a first connecting structure. In order to increase the accuracy of the measurement, the first connection is connected to the central position of the elastic membrane 7.

Further, as shown in fig. 5 to 7, the first connecting structure includes a threaded rod connecting seat 9 and a diaphragm connecting seat 10, one end of the rod connecting seat 9 away from the diaphragm connecting seat 10 is fixedly connected with the connecting rod 5, and one end of the diaphragm connecting seat 10 away from the rod connecting seat 9 is fixedly connected with the elastic diaphragm 7.

As shown in fig. 8, the membrane connection seat 10 includes a first seat body 1002, one end of the first seat body 1002 is provided with a connection disc 1003, and the other end is provided with a threaded column 1001. The connection disc 1003 is fixedly connected with the elastic membrane 7, and the threaded column 1001 is in threaded connection with the rod connection seat 9. Specifically, the land 1003 is laser-welded to the elastic diaphragm 7. The rod connecting seat 9 comprises a second seat body, one end of the second seat body is provided with a rod connecting hole, and the other end of the second seat body is provided with an internal thread hole. The rod connection hole is fixedly connected with the connecting rod 5, and the internal threaded hole is in threaded connection with the threaded column 1001 of the diaphragm connection seat 10. Specifically, the end part of the connecting rod 5 is welded in the rod connecting hole, and the end part are welded by argon arc welding.

In order to facilitate the movement of the components of the movement 4 driven by the connecting rod 5, the end of the connecting rod 5 remote from the elastic membrane 7 is rotatably connected with the movement 4 by a first connecting piece 8. The first connecting member 8 is a pin shaft or a bolt and nut structure, and can be other rotation connecting modes commonly used in the field.

In one embodiment, movement 4 includes a first moment arm 401, a second moment arm 405, a sector gear 403, and a sun gear 402. One end of the first force arm 401 is rotationally connected with the connecting rod 5, the other end is rotationally connected with the first end of the second force arm 405, the second end of the second force arm 405 is slidingly connected with the handle end of the sector gear 403, the tooth end of the sector gear 403 is meshed with the sun gear 402, and the sun gear 402 is fixedly connected with the pointer 3 coaxially to drive the pointer 3 to rotate. It will be appreciated that the sector teeth 403 are rotatably connected to the dial. The movement 4 further includes a zeroing structure 404, where the zeroing structure 404 is a structure commonly used in the prior art, and will not be described herein.

In order to increase the accuracy of the transfer of the deformation quantity of the filling liquid 06, it is necessary in the prior art to provide a diaphragm 05 of the flange diaphragm gauge of the filling liquid 06 with a thickness of generally 0.05 to 0.1mm. The thickness of the elastic diaphragm 7 of the liquid-free flange diaphragm pressure gauge is 0.1-1mm. According to the thickness of the elastic diaphragm 7 of the fluxless flange diaphragm pressure gauge, as the thickness of the diaphragm is different with different measured pressures, deformation transmission is more accurate due to the fact that the connecting rod 5 is adopted to transmit deformation, and the deformation transmission is generally 0.1mm to 1mm, and the diaphragm is a thin film sheet for low pressure measurement and a thick film sheet for high pressure measurement. The liquid-free flange diaphragm pressure gauge improves the thickness of the diaphragm, prolongs the service life, reduces the probability of the diaphragm being damaged by external force, and avoids the premature corrosion of the diaphragm.

Specifically, the elastic membrane 7 is a nichrome sheet. The elastic membrane 7 is a wave-shaped membrane.

When the pressure of a medium is measured by the liquid-free flange diaphragm pressure gauge, the liquid-free flange diaphragm pressure gauge is connected to a measuring position, when the elastic diaphragm 7 senses the pressure, the elastic diaphragm 7 moves upwards and drives the connecting rod 5 to move, the first connecting piece 8 transmits the upward displacement distance to the first force arm 401, the first force arm 401 drives the sector gear 403 to rotate through the second force arm 405, so that the sun gear 402 meshed with the sector gear 403 is driven to rotate, the pointer 3 is arranged on the sun gear 402, the pointer 3 is driven to rotate, and the pointer 3 indicates the pressure.

According to the liquid-free flange diaphragm pressure gauge, the diaphragm 05 for isolation in the prior art is replaced by the elastic diaphragm 7, the upward (downward vacuum measurement) displacement amount is generated by the elastic diaphragm 7 according to different pressures after the elastic diaphragm 7 is pressed, the Bowden tube 01 of the flange diaphragm pressure gauge in the prior art is omitted, filling liquid 06 does not need to be arranged in the flange diaphragm pressure gauge, the connecting rod 5 is used instead, the upward or downward movement amount of the elastic diaphragm 7 is generated under the pressure action of a measuring medium and is transmitted to the movement 4 through the connecting rod 5, and the movement 4 drives the pointer 3 to rotate to indicate the measuring pressure value.

The liquid-free flange diaphragm pressure gauge has a simple structure, increases the thickness of the diaphragm, prolongs the service life of the diaphragm, reduces the risk of the diaphragm being damaged by external force, and avoids the premature corrosion of the diaphragm. The liquid-free flange diaphragm pressure gauge does not need to be filled with filling liquid, the situation that the filling liquid flows into a measured medium of a measuring pipeline or a tank body is avoided, the measured medium pollution caused by the damage of the elastic diaphragm 7 is avoided, and the purity of the measured medium and the safety of a special measuring medium are ensured; meanwhile, as the filling liquid is not required to be arranged, the influence of temperature change on the precision of the measured value is reduced, the measured pressure result is more accurate, the method can be applied to extremely low or extremely high temperature, the requirement of the pressure gauge on the use environment temperature is reduced, the temperature application range of the pressure gauge is larger, and the use range of the pressure gauge is enlarged.

In the description of the present embodiment, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present embodiment.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present embodiment, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a no liquid flange diaphragm manometer, includes gauge outfit and flange through branch connection, its characterized in that, be provided with the core in the gauge outfit, be provided with the elastic diaphragm on the flange, the elastic diaphragm with the core passes through the connecting rod and connects.

2. The liquid-free flange diaphragm pressure gauge according to claim 1, wherein the flange is provided with a first through hole and a pressure measuring cavity in axial communication, the support rod is provided with a second through hole in axial communication, and the first through hole and the second through hole are correspondingly arranged in communication;

3. The flangeless diaphragm pressure gauge of claim 1 wherein the connecting rod is fixedly connected to the elastic diaphragm by a first connection structure;

4. A flangeless diaphragm pressure gauge according to claim 3 wherein the first connection structure comprises a threaded rod connection socket and a diaphragm connection socket, the end of the rod connection socket remote from the diaphragm connection socket being fixedly connected with the connecting rod, the end of the diaphragm connection socket remote from the rod connection socket being fixedly connected with the elastic diaphragm.

5. The flangeless diaphragm pressure gauge of claim 1 wherein an end of the connecting rod remote from the elastic diaphragm is rotatably coupled to the movement by a first coupling member.

6. The flangeless diaphragm pressure gauge of claim 1 wherein the elastomeric diaphragm has a thickness of 0.1-1mm.

7. The liquid-free flange diaphragm pressure gauge of claim 1, wherein the elastic diaphragm is a nichrome sheet;

the elastic membrane is a wavy membrane.

8. The liquid-free flange diaphragm pressure gauge according to claim 1, wherein the movement comprises a first force arm, a second force arm, a sector gear and a central gear, one end of the first force arm is rotationally connected with the connecting rod, the other end of the first force arm is rotationally connected with the first end of the second force arm, the second end of the second force arm is slidingly connected with the handle end of the sector gear, the tooth end of the sector gear is meshed with the central gear, and the central gear is fixedly connected with the pointer coaxially to drive the pointer to rotate.

9. The liquid-free flange diaphragm pressure gauge according to claim 4, wherein the diaphragm connecting seat comprises a first seat body, one end of the first seat body is provided with a connecting disc, and the other end is provided with a threaded column;

10. The liquid-free flange diaphragm pressure gauge of claim 4, wherein the rod connection seat comprises a second seat body, one end of the second seat body is provided with a rod connection hole, and the other end is provided with an internal threaded hole;