CN210442023U

CN210442023U - Novel differential pressure transmitter

Info

Publication number: CN210442023U
Application number: CN201921411432.6U
Authority: CN
Inventors: 闵金卫; 刘炎光
Original assignee: Shanghai Zhangang Technology Group Jiangsu Co Ltd; Yichang Throttling Device Manufacturing Jiangsu Co Ltd
Current assignee: Shanghai Zhangang Technology Group Jiangsu Co Ltd; Yichang Throttling Device Manufacturing Jiangsu Co Ltd
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2020-05-01
Anticipated expiration: 2029-08-28

Abstract

The utility model relates to a detecting instrument technical field especially relates to a novel differential pressure transmitter. The to-be-solved technical problem of the utility model is that differential pressure transmitter inception instantaneous overflows and causes the problem of harm to the instrument. In order to solve the technical problem, the utility model provides a novel differential pressure transmitter, including the changer body, the positive, negative pressure input end of changer body is all fixed and is provided with rather than communicating pressure control mechanism, pressure control mechanism includes control shell, control shell's left side fixedly connected with rather than communicating medium input tube. This differential pressure transmitter adopts the input of the liquid of piston head, medium orifice plate and liquid level floater control transmitter input, and the transmitter can effectually prevent the impact of liquid medium in the pipeline to transmitter pressure chip group when the initial operation after the installation, has avoided the damage of equipment initial during operation instantaneous overflowing to detecting element, the effectual normal use who ensures equipment.

Description

Novel differential pressure transmitter

Technical Field

The invention relates to the technical field of detection instruments, in particular to a novel differential pressure transmitter.

Background

Differential pressure transmitter's sensor chip is very fragile, and when the first use of installation back lets in liquid to its input, the liquid medium that instantaneously overflows wraps up in and is holding the air and can cause the impact to its pressure chip, and this impact very easily causes differential pressure transmitter's irreversible damage, leads to differential pressure transmitter's measurement accuracy to change, direct damage even.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a novel differential pressure transmitter, which solves the problem that the instrument is damaged by the initial instantaneous overcurrent of the differential pressure transmitter.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a novel differential pressure transmitter, includes the changer body, the positive and negative pressure input of changer body all is fixed to be provided with rather than communicating pressure control mechanism.

The pressure control mechanism comprises a control shell, a medium input pipe communicated with the control shell is fixedly connected to the left side of the control shell, a medium output pipe communicated with the control shell is fixedly connected to the right side of the control shell, one end of the medium output pipe is fixedly connected with the input end of the transmitter body, an overflow pipe communicated with the control shell is fixedly connected to the top of the control shell, and the inner space of the control shell is divided into a storage cavity, a valve cavity and a control cavity by two partition plates.

The top of the storage cavity is movably inserted with a piston shaft, the top end of the piston shaft is fixedly connected with a piston head, the piston head is movably sleeved in the overflow pipe, the bottom end of the piston shaft is fixedly connected with a linkage plate, the top surface of the linkage plate is movably connected with the top of the inner wall of the storage cavity through a sealing spring, and the sealing spring is movably sleeved on the surface of the piston shaft.

The fixed valve board that is provided with of valve intracavity, the infusion hole has been seted up on the surface of valve board, seted up the spout in the valve board, sliding connection has the medium orifice plate in the spout, the bottom swing joint of dislocation spring and valve intracavity wall is passed through to the bottom of medium orifice plate, the top of valve intracavity wall is run through on the top of medium orifice plate and extends to the control chamber, the driven tongue of top fixedly connected with of medium orifice plate, the liquid level floater has been cup jointed in the valve intracavity activity, the top fixedly connected with cue of liquid level floater, the top of cue is run through the top of valve intracavity wall and extends to the control chamber, the fixed surface cover of cue has connect the locating plate, the top of locating plate is through the top swing joint of positioning spring and valve intracavity wall, the positioning spring activity cup joints the surface at the cue.

The left side of control intracavity wall has been seted up the control and has been led to the groove, the control is led to the inslot and is fixed pegged graft there is the lever axle, the surperficial activity of lever axle has cup jointed the gangbar, the one end and the gangboard of gangbar are articulated, the activity of control intracavity has cup jointed the movable block, the other end and the movable block of gangbar are articulated, the displacement spout has been seted up in the movable block, the bottom that the displacement spout was run through and extend to its inside in the top of cue, the top fixedly connected with initiative tongue of cue, the one end of initiative tongue is run through the displacement spout and is extended to the right side of movable block.

Further preferably, the storage chamber, the valve chamber and the control chamber are respectively arranged at the left side, the right lower side and the right upper side in the control housing.

Further preferably, the aperture of the medium pore plate is equal to the aperture of the infusion hole in size.

Preferably, the length of the displacement chute is equal to the distance between the through hole in the medium pore plate and the infusion hole.

Preferably, the linkage rod is fixedly sleeved with two sealing rubber pads on the surface, and the two sealing rubber pads are respectively lapped with the left side and the right side of the control through groove.

Further preferably, the projection of the driving tongue and the driven tongue on the same horizontal plane is smaller than the sum of the lengths of the driving tongue and the driven tongue.

(III) advantageous effects

The invention provides a novel differential pressure transmitter, which has the following beneficial effects:

(1) this differential pressure transmitter adopts the input of the liquid of piston head, medium orifice plate and liquid level floater control transmitter input, and the transmitter can effectually prevent the impact of liquid medium in the pipeline to transmitter pressure chip group when the initial operation after the installation, has avoided the damage of equipment initial during operation instantaneous overflowing to detecting element, the effectual normal use who ensures equipment.

(2) This differential pressure transmitter not only can stop the harm of instantaneous overflowing to equipment, owing to introduced the liquid level floater and controlled the equipment operation, can effectually prevent the influence of the interior doped gas of pipeline to equipment, can improve measurement accuracy through the gas escape in the piston head with the medium, prolonged the safe life of equipment.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a front cross-sectional view of the pressure control mechanism of the present invention.

In the figure: 1 transmitter body, 2 pressure control mechanism, 201 control shell, 202 medium input tube, 203 medium output tube, 204 overflow tube, 205 partition plate, 206 storage cavity, 207 valve cavity, 208 control cavity, 209 piston shaft, 210 piston head, 211 linkage plate, 212 sealing spring, 213 valve plate, 214 transfusion hole, 215 chute, 216 medium hole plate, 217 dislocation spring, 218 driven tongue, 219 liquid level float ball, 220 floating ball rod, 221 positioning plate, 222 positioning spring, 223 control through groove, 224 lever shaft, 225 linkage rod, 226 movable block, 227 displacement chute, 228 driving tongue.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a novel differential pressure transmitter, includes changer body 1, and the positive and negative pressure input of changer body 1 all is fixed to be provided with rather than communicating pressure control mechanism 2.

The pressure control mechanism 2 comprises a control shell 201, a medium input pipe 202 communicated with the control shell 201 is fixedly connected to the left side of the control shell 201, a medium output pipe 203 communicated with the right side of the control shell 201 is fixedly connected to the right side of the control shell 201, one end of the medium output pipe 203 is fixedly connected with the input end of the transmitter body 1, an overflow pipe 204 communicated with the top of the control shell 201 is fixedly connected to the top of the control shell 201, the inner space of the control shell 201 is divided into a storage cavity 206, a valve cavity 207 and a control cavity 208 by two partition plates 205, and the storage cavity 206, the valve cavity 207 and the control cavity 208 are respectively arranged on the left side, the right lower side and the.

A piston shaft 209 is movably inserted in the top of the storage cavity 206 in a penetrating manner, the diameter of the piston shaft 209 meets the aperture of a through hole through which the piston shaft is inserted, a piston head 210 is fixedly connected to the top end of the piston shaft 209, the piston head 210 is movably sleeved in the overflow pipe 204, a linkage plate 211 is fixedly connected to the bottom end of the piston shaft 209, the top surface of the linkage plate 211 is movably connected with the top of the inner wall of the storage cavity 206 through a sealing spring 212, and the sealing spring 212 is movably sleeved on the surface of the piston shaft 209.

A valve plate 213 is fixedly arranged in the valve cavity 207, an infusion hole 214 is formed on the surface of the valve plate 213, a flow-limiting chute 215 is formed in the valve plate 213, a medium orifice plate 216 is connected in the flow-limiting chute 215 in a sliding manner, the aperture of the medium orifice plate 216 is equal to the aperture of the infusion hole 214, the bottom end of the medium orifice plate 216 is movably connected with the bottom of the inner wall of the valve cavity 207 through a staggered spring 217, the top end of the medium orifice plate 216 penetrates through the top of the inner wall of the valve cavity 207 and extends to the control cavity 208, the top end of the medium orifice plate 216 is fixedly connected with a driven tongue 218, a liquid level floating ball 219 is movably sleeved in the valve cavity 207, the top end of the liquid level floating ball 219 is fixedly connected with a floating ball rod 220, one end of the floating ball rod 220 penetrates through the top of the inner wall of the valve cavity 207 and extends to the control cavity 208, the positioning spring 222 is movably sleeved on the surface of the cue 220.

A control through groove 223 is formed in the left side of the inner wall of the control cavity 208, a lever shaft 224 is fixedly inserted in the control through groove 223, a linkage rod 225 is movably sleeved on the surface of the lever shaft 224, two sealing rubber pads are fixedly sleeved on the surface of the linkage rod 225 and respectively overlapped with the left side and the right side of the control through groove 223, the control through groove 223 is sealed and prevents a medium from flowing into the control cavity 208 on the premise that the linkage rod 225 is enabled to move by the sealing rubber pads, one end of the linkage rod 225 is hinged to a linkage plate 211, a movable block 226 is movably sleeved in the control cavity 208, the other end of the linkage rod 225 is hinged to the movable block 226, a displacement sliding groove 227 is formed in the movable block 226, the length of the displacement sliding groove 227 is equal to the distance between a through hole in a medium orifice plate 216 and a transfusion hole 214, when a piston head 210 is overlapped and sealed with the top of the control shell 201, a liquid level 219 rises, and the medium orifice plate 216 is pushed to rise, so that the through hole on the surface of the medium orifice plate 216 is opposite to the position of the infusion hole 214, at the moment, liquid medium can be input into the transmitter body 1, the top end of the ball float rod 220 penetrates through the bottom of the displacement chute 227 and extends into the displacement chute 227, the top end of the ball float rod 220 is fixedly connected with a driving tongue 228, one end of the driving tongue 228 penetrates through the displacement chute 227 and extends to the right side of the movable block 226, the projection of the driving tongue 228 and the driven tongue 218 on the same horizontal plane is smaller than the sum of the lengths of the driving tongue 228 and the driven tongue 218, the driving tongue 228 can be lapped with the driven tongue 218 after rising to a certain position, and.

The working principle is as follows: when the differential pressure transmitter is installed for the first time, the medium input pipe 202 instantly flows in the liquid medium wrapped with gas, at this time, the liquid level in the storage cavity 206 is low, the air in the storage cavity 206 is squeezed, the pressure in the storage cavity 206 is increased, the piston head 210 is jacked up, the piston shaft 209 enables the displacement upper limit position of the driving tongue 228 to be lowered through the transmission action of the linkage rod 225, so that the displacement lower limit position of the driven tongue 218 is lower, the medium orifice plate 216 is downwards acted by the dislocation spring 217, the through hole on the surface of the medium orifice plate 216 and the infusion hole 214 are dislocated to prevent the instantly overflowing liquid medium and air from entering the medium output pipe 203, so that the liquid medium is prevented from reaching the interior of the differential pressure transmitter body 1, because the piston shaft 209 is vertically arranged, the squeezed air, the gas contained in the liquid medium and the overflowing liquid medium flow out through the overflow pipe 204, when the fluid pressure of the, the piston head 210 closes the top of the storage cavity 206, and simultaneously the movable block 226 rises, so that the displacement upper limit position of the driving tongue 228 is raised, the liquid level of the liquid medium rises to push the liquid level floating ball 219 to rise, so that the driving tongue 228 rises in the displacement chute and pushes against the driven tongue 218 to rise, the medium pore plate 216 rises, and when the through hole formed in the surface of the medium pore plate 216 is opposite to and coincident with the position of the infusion hole 214, the liquid medium in the storage cavity 206 enters the medium output pipe 203 and is conveyed to the interior of the transmitter body 1.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention.

Claims

1. The utility model provides a novel differential pressure transmitter, includes transmitter body (1), its characterized in that: the positive pressure input end and the negative pressure input end of the transmitter body (1) are both fixedly provided with a pressure control mechanism (2) communicated with the positive pressure input end and the negative pressure input end;

the pressure control mechanism (2) comprises a control shell (201), a medium input pipe (202) communicated with the control shell (201) is fixedly connected to the left side of the control shell (201), a medium output pipe (203) communicated with the control shell (201) is fixedly connected to the right side of the control shell (201), one end of the medium output pipe (203) is fixedly connected with the input end of the transmitter body (1), an overflow pipe (204) communicated with the control shell (201) is fixedly connected to the top of the control shell (201), and the inner space of the control shell (201) is divided into a storage cavity (206), a valve cavity (207) and a control cavity (208) by two partition plates (205);

a piston shaft (209) is movably inserted into the top of the storage cavity (206), a piston head (210) is fixedly connected to the top end of the piston shaft (209), the piston head (210) is movably sleeved in the overflow pipe (204), a linkage plate (211) is fixedly connected to the bottom end of the piston shaft (209), the top surface of the linkage plate (211) is movably connected with the top of the inner wall of the storage cavity (206) through a sealing spring (212), and the sealing spring (212) is movably sleeved on the surface of the piston shaft (209);

a valve plate (213) is fixedly arranged in the valve cavity (207), a transfusion hole (214) is formed in the surface of the valve plate (213), a flow-limiting chute (215) is formed in the valve plate (213), a medium orifice plate (216) is connected in the flow-limiting chute (215) in a sliding manner, the bottom end of the medium orifice plate (216) is movably connected with the bottom of the inner wall of the valve cavity (207) through a staggered spring (217), the top end of the medium orifice plate (216) penetrates through the top of the inner wall of the valve cavity (207) and extends to the control cavity (208), the top end of the medium orifice plate (216) is fixedly connected with a driven tongue (218), a liquid level floating ball (219) is movably sleeved in the valve cavity (207), the top end of the liquid level floating ball (219) is fixedly connected with a floating ball rod (220), one end of the floating ball rod (220) penetrates through the top of the inner wall of the, a positioning plate (221) is fixedly sleeved on the surface of the ball arm (220), the top end of the positioning plate (221) is movably connected with the top of the inner wall of the valve cavity (207) through a positioning spring (222), and the positioning spring (222) is movably sleeved on the surface of the ball arm (220);

the left side of control chamber (208) inner wall has seted up control through groove (223), control through groove (223) internal fixation is pegged graft and has been had lever shaft (224), the surperficial activity of lever shaft (224) has cup jointed gangbar (225), the one end and the gangboard (211) of gangbar (225) are articulated, the activity has cup jointed movable block (226) in control chamber (208), the other end and the movable block (226) of gangbar (225) are articulated, displacement spout (227) have been seted up in movable block (226), the top of pool cue (220) runs through the bottom of displacement spout (227) and extends to inside it, the top fixedly connected with initiative tongue (228) of pool cue (220), the one end of initiative tongue (228) runs through displacement spout (227) and extends to the right side of movable block (226).

2. The novel differential pressure transmitter of claim 1, wherein: the storage cavity (206), the valve cavity (207) and the control cavity (208) are respectively arranged on the left side, the right lower side and the right upper side in the control shell (201).

3. The novel differential pressure transmitter of claim 1, wherein: the aperture of the medium pore plate (216) is equal to the aperture of the infusion hole (214).

4. The novel differential pressure transmitter of claim 1, wherein: the length of the displacement chute (227) is equal to the distance between the through hole in the medium pore plate (216) and the infusion hole (214).

5. The novel differential pressure transmitter of claim 1, wherein: two sealing rubber pads are fixedly sleeved on the surface of the linkage rod (225), and the two sealing rubber pads are respectively lapped with the left side and the right side of the control through groove (223).

6. The novel differential pressure transmitter of claim 1, wherein: the projection of the driving tongue (228) and the driven tongue (218) on the horizontal plane is smaller than the sum of the lengths of the driving tongue (228) and the driven tongue (218).