CN210487529U

CN210487529U - Portable plug-in densimeter

Info

Publication number: CN210487529U
Application number: CN201921396599.XU
Authority: CN
Inventors: 朱亚华; 张远保; 黄浩远; 张彭
Original assignee: Shanghai Enbang Automation Instrument Co ltd
Current assignee: Shanghai Enbang Automation Instrument Co ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-05-08
Anticipated expiration: 2029-08-26

Abstract

The utility model discloses a portable bayonet densimeter, including inserting the pole, insert the pole top and be connected with the casing, be equipped with first probe and second probe on inserting the pole, first probe sets up in second probe top, all is equipped with the detection diaphragm on first probe and the second probe, be equipped with the cavity in inserting the pole, be equipped with the installation cavity in the casing. The utility model discloses bayonet densimeter carries out the structural modification on the basis of conventional insertion densimeter, for satisfying the needs at customer's scene, will put in order the table repacking to become direct outlet structure, adds extension pipe, locking wire pipe again, through sealing washer and stainless steel clamp, with extension pipe and locking wire union coupling together, uses rechargeable lithium battery power supply, makes the customer can carry out real-time measurement according to the liquid level height of scene reality, also is convenient for dismantle at any time and hand-carry.

Description

Portable plug-in densimeter

Technical Field

The utility model relates to a densimeter technical field, concretely relates to portable bayonet densimeter.

Background

The density meter is used for measuring the density of liquid, and the static pressure of a liquid column with a certain height is in direct proportion to the density of the liquid, so that the density of the liquid to be measured can be measured according to the static pressure value measured by the pressure measuring instrument. Conventional bayonet densimeter can contain an inserted bar, fixed position has seted up two taper holes about the inserted bar, the downthehole pressure sensing component that is used for measuring pressure of respectively welding of taper, the capillary of another one side welding of every pressure sensing component, the other end welding of capillary is in the one end of sensor, when measuring liquid column density, pressure sensing component inserts along with the inserted bar in waiting to detect the liquid together, two pressure sensing components all do not have the liquid that awaits measuring, pressure sensing component direct contact awaits measuring the liquid and obtains pressure signal, and transmit pressure signal to pressure transmitter through the filling liquid in the capillary on, thereby the pressure value that records.

The existing densimeter cannot carry out real-time measurement according to liquid level heights of different sites, and meanwhile, the measurement accuracy of the densimeter is reduced in the environment with flow velocity.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a portable bayonet densimeter to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a portable plug-in densimeter comprises a plug-in rod, wherein the top end of the plug-in rod is connected with a shell, the plug-in rod is provided with a first probe and a second probe, the first probe is arranged above the second probe, the first probe and the second probe are both provided with detection diaphragms, a cavity is arranged in the plug-in rod, and an installation cavity is arranged in the shell;

a sensor and a circuit board are arranged in the mounting cavity, a first capillary tube and a second capillary tube are connected to two ends of the sensor respectively, the first capillary tube and the second capillary tube are connected to a first probe and a second probe in the cavity respectively in a welding mode, and a detection diaphragm is welded on the first probe and the second probe through laser; filling liquid is filled in the first capillary and the second capillary, a partition plate is further arranged in the mounting cavity and used for separating the circuit board from the sensor, 2-core shielding wires are welded on the circuit board, and the 2-core shielding wires penetrate through the mounting cavity and are arranged outside the shell.

As the utility model discloses a further scheme is again: the filling liquid is silicone oil.

As the utility model discloses a further scheme is again: the pressure value detected by the sensor can be converted into a 4-20mA analog quantity signal with the HART protocol through the circuit board, and can be output to a secondary display instrument through a 2-wire system 4-20mA with the HART protocol, so that the real-time density can be displayed on site.

As the utility model discloses a further scheme is again: the sensor is a monocrystalline silicon sensor.

As the utility model discloses a further scheme is again: the secondary display meter may be powered by a rechargeable 24VDC10Ah lithium battery.

As the utility model discloses a further scheme is again: the 2-core shielding wire is locked by a wire locking device.

As the utility model discloses a further scheme is again: the upper part of the shell is provided with a thread section.

As the utility model discloses a further scheme is again: and the mounting cavity is also connected with an oil filling pipe, and the oil filling pipe is communicated with the detection diaphragm, the capillary tube and the sensor through an all-welded high-vacuum oil filling technology to fill oil among the detection diaphragm, the capillary tube and the sensor.

As the utility model discloses a further scheme is again: the inserting rod can be further provided with an extension pipe and a wire locking pipe, and the extension pipe and the wire locking pipe can be connected with the inserting densimeter through a sealing ring and a stainless steel hoop.

As the utility model discloses a further scheme is again: and the shell is also internally sealed and filled with sealant.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses bayonet densimeter carries out the structural modification on the basis of conventional insertion densimeter, for satisfying the needs at customer site, will put the table into change into direct outlet structure, adds extension pipe, locking wire pipe again, through sealing washer and stainless steel clamp, with extension pipe and locking wire union coupling together, makes the customer can select the multistage extension pipe to carry out real-time measurement according to the liquid level height at scene reality.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the inner structure of the insertion rod and the housing of the present invention;

FIG. 3 is a schematic view of the structure of the extension tube of the present invention;

fig. 4 is a schematic view of the structure of the locking wire of the present invention;

fig. 5 is the power supply structure diagram of the secondary display instrument of the present invention.

In the figure: 1. an insertion rod; 2. a housing; 3. a second probe; 4. detecting the membrane; 5. a cavity; 6. a mounting cavity; 7. a liquid barrier; 8. filling liquid; 9. a sensor; 10. a circuit board; 11. a first capillary tube; 12. a second capillary tube; 13. 2-core shielded wires; 14. a wire locker; 15. a threaded segment; 16. a secondary display instrument; 17. an oil-filled tube; 18. an extension tube; 19. a lock wire tube; 20. a seal ring; 21. a stainless steel hoop; 22. sealing glue; 23. a first probe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, in the present invention, a portable plug-in densimeter includes a plug-in rod 1, a housing 2 is connected to a top end of the plug-in rod 1, a first probe 23 and a second probe 3 are disposed on the plug-in rod 1, the first probe 23 is disposed above the second probe 3, a detection diaphragm 4 is disposed on each of the first probe 23 and the second probe 3, a cavity 5 is disposed in the plug-in rod 1, and an installation cavity 6 is disposed in the housing 2;

a sensor 9 and a circuit board 10 are arranged in the mounting cavity 6, a first capillary tube 11 and a second capillary tube 12 are respectively connected to two ends of the sensor 9, the first capillary tube 11 and the second capillary tube 12 are respectively connected to a first probe 23 and a second probe 3 in the cavity 5 in a welding mode, and a detection diaphragm 4 is welded on the first probe 23 and the second probe 3 through laser; filling liquid 8 is filled in the first capillary tube 11 and the second capillary tube 12, a partition plate 7 is further arranged in the installation cavity 6 to separate the circuit board 10 from the sensor 9, a 2-core shielding wire 13 is welded on the circuit board 10, and the 2-core shielding wire 13 penetrates through the installation cavity 6 to be arranged outside the shell 2.

The filling liquid 8 of the present embodiment is silicone oil.

The pressure value detected by the sensor 9 of the embodiment can be converted into a 4-20mA analog quantity signal with HART protocol through the circuit board 10, and can be output to the secondary display instrument 16 through the 2-wire system 4-20mA with HART protocol, so that the real-time density can be displayed on site.

The sensor 9 of the present embodiment is a monocrystalline silicon sensor; the whole meter has higher measurement accuracy, anti-interference performance and stability.

The secondary display meter 16 of this embodiment may be powered by a rechargeable 24VDC10Ah lithium battery.

The 2-core shield wire 13 of the present embodiment is locked by the wire locker 14.

The upper part of the shell 2 of the embodiment is provided with a threaded section 15; 2 upper portions of casing adopt the helicitic texture, in the environment that has the velocity of flow, can add the high density pore protection casing, and the probe of bottommost is covered to the protection casing, and the reduction on-the-spot velocity of flow of this protection casing very big limit increases and measures the accuracy, simultaneously owing to be the pore protection casing, so carry relatively more lightly.

An oil filling pipe 17 is connected in the installation cavity 6 of the embodiment, and the oil filling pipe 17 is communicated to fill oil between the detection diaphragm 4 and the sensor 9 through an all-welded high-vacuum oil filling technology; through the all-welded high-vacuum oil filling technology, the oil filling is more convenient, the filling liquid 8 can be ensured not to be leaked, and the stability and the safety of the whole meter are also ensured.

The insertion rod 1 of this embodiment may also have an extension tube 18 and a lockwire tube 19 mounted thereon, the extension tube (18 and lockwire tube 19 may be connected to the insertion densitometer by a seal ring 20 and a stainless steel band 21.

The shell 2 of the embodiment is also internally sealed and filled with a sealant 22; can protect sensor 9 and circuit board 10, prevent the comdenstion water that the vapor condensation leads to, die the line lock through the line locking device 14 to guarantee that whole densimeter can realize IP 68's protection level, also make the complete machine can realize normal measurement under adverse circumstances or the weather.

The utility model discloses a theory of operation is: the utility model discloses densimeter has first probe 23 and second probe 3, first probe 23 and second probe 3 have detection diaphragm 4, when densimeter inserted river or the liquid that awaits measuring, first probe 23 and second probe 3 need immerse in liquid completely, the detection diaphragm 4 of two probes receives liquid extrusion atress this moment, they can promote the back filling liquid 8 of response diaphragm, through first capillary 11 and second capillary 12, with pressure conduction to the both ends of sensor 9, the pressure value that sensor 9 detected passes through circuit board 10 and turns into pressure signal 4-20 mA's of taking the HART agreement analog quantity signal, 4-20mA output secondary display instrument 16 through the 2 line systems of taking the HART agreement, can supply the on-the-spot demonstration real-time density.

The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A portable plug-in densimeter comprises a plug-in rod (1) and is characterized in that the top end of the plug-in rod (1) is connected with a shell (2), a first probe (23) and a second probe (3) are arranged on the plug-in rod (1), the first probe (23) is arranged above the second probe (3), detection diaphragms (4) are arranged on the first probe (23) and the second probe (3), a cavity (5) is arranged in the plug-in rod (1), and a mounting cavity (6) is arranged in the shell (2);

a sensor (9) and a circuit board (10) are arranged in the mounting cavity (6), two ends of the sensor (9) are respectively connected with a first capillary tube (11) and a second capillary tube (12), the first capillary tube (11) and the second capillary tube (12) are respectively connected to a first probe (23) and a second probe (3) in the cavity (5) in a welding mode, and the first probe (23) and the second probe (3) are welded with a detection diaphragm (4) through laser; filling liquid (8) is filled in the first capillary (11) and the second capillary (12), a partition plate (7) is further arranged in the installation cavity (6) to separate the circuit board (10) from the sensor (9), 2 cores of shielding wires (13) are welded on the circuit board (10), and the 2 cores of shielding wires (13) penetrate through the installation cavity (6) and are arranged outside the shell (2).

2. A portable, insertable densitometer according to claim 1, characterized in that the filling liquid (8) is silicone oil.

3. The portable plug-in densitometer of claim 1, wherein the pressure value detected by the sensor (9) can be converted into an analog signal of 4-20mA with HART protocol by the circuit board (10), and can be output to the secondary display instrument (16) through 4-20mA with HART protocol 2 wire system, so as to display the real-time density on site.

4. A portable, insertable densitometer according to claim 3, characterized in that the sensor (9) is a monocrystalline silicon sensor.

5. A portable plug-in densitometer according to claim 3, wherein the secondary display meter (16) may be powered by a rechargeable 24VDC10Ah lithium battery.

6. A portable plug-in densitometer according to claim 1, characterized in that the 2-core shielded wire (13) is lockingly arranged by a wire locker (14).

7. A portable, insertable densitometer according to claim 1, characterized by the fact that the housing (2) is provided with a threaded section (15) at the upper part.

8. The portable plug-in densitometer of claim 1, wherein an oil filling tube (17) is further connected in the mounting cavity (6), and the oil filling tube (17) is communicated to fill oil between the detection diaphragm (4) and the sensor (9) through an all-welded high-vacuum oil filling technology.

9. The portable plug-in densitometer according to claim 1, characterized in that the plug-in rod (1) is further installed with an extension tube (18) and a lock tube (19), the extension tube (18) and the lock tube (19) can be connected with the plug-in densitometer through a seal ring (20) and a stainless steel clamp (21).

10. The portable, insertable densitometer of claim 1, wherein the housing (2) is further potted with a sealant (22).