CN208476460U - A kind of pressure measurement utensil calibrating environment test device - Google Patents

Abstract

Disclose a kind of pressure measurement utensil calibrating environment test device.The device includes: metal shell, chamber and vibration-damped table, the air conditioning room and certificate test room of upper and lower part connection are equipped with inside chamber, air conditioning room successively includes that the inlet fans connected to the control circuit, humidifier, cooling dehumidifier, semi-conductor electricity backing and outlet fan, control circuit are arranged on the chamber side wall from bottom to up；Multiple groups Temperature Humidity Sensor is set in certificate test room；Vibration-damped table from top to bottom includes vibration-damped table table top, steel cylinder.The utility model passes through environmental condition needed for can providing verification process, including temperature and humidity conditions, external magnetic field is eliminated, has good shock-absorbing function, overcome the shortcomings of no dedicated calibrating laboratory condition, allows gage work personnel online or end examines and determine pressure measurement utensil.

Description

A kind of pressure measurement utensil calibrating environment test device

Technical field

The utility model relates to pressure measurement fields, examine and determine environmental test more particularly, to a kind of pressure measurement utensil Device.

Background technique

Pressure measurement utensil is widely used in industrial and agricultural production, process control, instrument and meter, the fields such as communications and transportation, pressure The accuracy of force directly influences process flow, or even influences people's life health property safety, the standard that amount of pressure passes True property and reliability need gage work personnel especially to pay attention to.High-precision digital pressure gauge, pressure sensor, pressure transmitter Equal measurement instruments are in verification process, and the requirement to environment is very high, and there is special perseverance in general inspection examination criteria laboratory Warm laboratory.But if accomplish constant indoor temperature without condition, or calibrating school is carried out to pressure standard meter in working site Standard, in addition to temperature and humidity conditions be difficult to reach calibrating require it is outer, working site there is likely to be shaking or interference of external magnetic field etc., Additional requirement is proposed to metrological service and metrological personnel.

By taking automatic normal pressure generator as an example, automatic normal pressure generator is to automatically control and export goal pressure Digital pressure gauge, gas medium pressure generator and medium pressure liquid generator can be divided into.Calibrating according to relevant device Regulation, pressure generator is stringenter to environmental requirement, 0.1 grade or more of pressure generator, requires temperature (20 in verification process ±2)℃；Relative humidity is not more than 85%, near standard and tested pressure generator are locating without apparent mechanical oscillation and External magnetic field.In the calibration operation of routine experimentation room, reaches environmental requirement and do not send one's regards to topic.If worked at the scene, need to guarantee In verification process, environmental condition meets regulatory requirements.Therefore, it is necessary to develop a kind of pressure measurement utensil calibrating environmental test dress It sets.

The information for being disclosed in the utility model background technology part is merely intended to deepen the general background to the utility model The understanding of technology, and be not construed as recognizing or imply in any form the information constitute by those skilled in the art public affairs The prior art known.

Utility model content

The utility model proposes a kind of pressure measurement utensils to examine and determine environment test device, can be by test cavity Interior offer simultaneously keeps constant temperature and humidity, eliminates external magnetic field and mechanical oscillation.It is mentioned for the daily on-site proving work of measurement verification personnel For convenient.

One side according to the present utility model proposes a kind of pressure measurement utensil calibrating environment test device.The dress Set includes: metal shell, chamber and vibration-damped table, in which:

The air conditioning room and certificate test room of upper and lower part connection, the air conditioning are equipped with inside the chamber Room successively includes the inlet fans connected to the control circuit, humidifier, cooling dehumidifier, semi-conductor electricity backing and goes out from bottom to up One's intention as revealed in what one says fan, the control circuit are arranged on the chamber side wall；Multiple groups temperature and humidity sensing is set in the certificate test room Device；

The vibration-damped table includes vibration-damped table table top, crash roll, husky cylinder, and the crash roll supports the vibration-damped table table top, and And it is arranged on the inside of the barrel of the husky cylinder.

Preferably, the metal shell is equipped with the number for environmental condition in show case connecting with the control circuit Aobvious panel and operation button, earth lead for temperature and humidity to be arranged.

Preferably, foam heat-insulation layer is provided between the metal shell body and the chamber.

Preferably, three groups of Temperature Humidity Sensors are set in the certificate test room, it is diagonal to be separately positioned on certificate test room Position and center.

Preferably, the vibration-damped table table top uses marble countertop, and length and width is greater than the certificate test case, with a thickness of 2 ~4cm.

Preferably, the grains of sand and cobblestone that the husky cylinder includes steel cylinder and is filled in inside the steel cylinder.

Preferably, the crash roll is microcellular rubber crash roll or air cushion, and area is identical as vibration-damped table table top, with a thickness of 14~16cm.

Preferably, it is separated between the dust devil and crash roll with wooden unit sheet rubber multilayered structure.

Preferably, the pressure measurement utensil examines and determine environment test device, which is characterized in that installs under the vibration-damped table Rubber paddle blade or recyclable wheel.

Pressure means according to the present utility model examine and determine environment test device, can overcome no dedicated calibrating laboratory item The deficiency of part allows gage work personnel online or end examines and determine pressure measurement utensil.The workbench can be with Environmental condition needed for providing verification process, including temperature and humidity conditions eliminate external magnetic field, and have good shock-absorbing function.

The utility model has other characteristics and advantages, these characteristics and advantages are from the attached drawing being incorporated herein and then Specific embodiment in will be apparent, or will in the drawings and the subsequent detailed description incorporated herein It is stated in detail, these the drawings and specific embodiments are used together to explain the specific principle of the utility model.

Detailed description of the invention

The utility model exemplary embodiment is described in more detail in conjunction with the accompanying drawings, the utility model it is above-mentioned And other purposes, feature and advantage will be apparent, wherein identical in the utility model exemplary embodiment Reference label typically represents same parts.

Fig. 1 is that the entirety for examining and determine environment test device according to the pressure means of the exemplary implementation scheme of the utility model is shown It is intended to；

Fig. 2 is the calibrating environmental test chamber shape assumption diagram according to the utility model.

Description of symbols:

1- metal shell, 2- chamber, 3- vibration-damped table, 4- certificate test room, 5- air conditioning room, 7- foam heat-insulation layer, 8- inlet fans, 9- humidifier, 10- cooling dehumidifier, 11- electrothermal semiconductor temp-controlling element, 12- export fan, 13- control electricity Road, 14- partition, 15- Temperature Humidity Sensor, 18- vibration-damped table table top, 19- crash roll, 20- wooden unit rubber multilayered structure, 21- steel Wheel, 32- operation button, 33- digital display face can be recycled in cylinder, the 22- grains of sand, 23- cobblestone, 24 husky cylinders, 25- rubber paddle blade, 26- Plate, 34- external power supply socket, 35- wire outlet, 36- earth lead.

Specific embodiment

The utility model is more fully described below with reference to accompanying drawings.Although showing the preferred of the utility model in attached drawing Embodiment, however, it is to be appreciated that may be realized in various forms the utility model without that should be limited by embodiments set forth here System.On the contrary, thesing embodiments are provided so that the utility model is more thorough and complete, and can be by the utility model Range is completely communicated to those skilled in the art.

As shown in Figure 1, the pressure means of exemplary implementation scheme according to the present utility model examine and determine environment test device packet Include metal shell 1, chamber 2, vibration-damped table 3.Chamber 2 is arranged in inside metal shell 1, and metal shell 1 is arranged in vibration-damped table 3 On.

Chamber 2 is internally provided with the certificate test room 4 and air conditioning room 5 of upper and lower part connection, certificate test room 4 With air conditioning room 5, between be arranged partition 14, between partition 14 and the upper wall and lower wall of chamber have gap so that calibrating Laboratory 4 keeps being connected to the upper and lower part of air conditioning room 5.

Air conditioning room 5 successively includes the inlet fans 8 being connected with control circuit 13, humidifier 9, cooling from bottom to up Dehumidifier 10, semiconductor thermoelectric temp-controlling element 11, outlet fan 12, control circuit 13 are arranged on the side wall of chamber 2.

Multiple groups Temperature Humidity Sensor 15 is set in certificate test room 4.

Vibration-damped table 3 includes vibration-damped table table top 18, crash roll 19, husky cylinder 24, and crash roll 19 supports vibration-damped table table top 18, and It is arranged on the inside of the barrel of husky cylinder 24.

In the embodiments of the present invention, by the way that the inlet fans 8 of 5 lower part of air conditioning room are arranged in and are arranged in sky The rotation of the outlet fan 12 on 5 top of gas regulation room, so that the certificate test room 4 being connected to 5 upper and lower part of air conditioning room Interior air circulation.

In existing technological means, temperature and humidity adjustment method is generally mainly dew point control methods and direct conditioning method Two kinds.Dew point control methods are also referred to as air washing method.Dew point control methods are such a regulative modes: will enter calibrating examination first Air themperature before testing room drops to dew-point temperature corresponding to target humidity, and carries out water to air, becomes air Moist saturated air under the dew-point temperature, is then heated to target temperature for saturation air temperature again, with the raising of temperature, Humidity also drops to target value, and finally the air for regulating temperature and humidity is sent in certificate test room.Dew point control methods Advantage is that humidity variation is small, but needs largely water excessively continuous to environment in the process.Such a adjusting of direct conditioning method Mode: when detecting that environment temperature is low, opening heating device, heat to environment, when detecting that environment temperature is high, opens system Device for cooling gives environment temperature reduction.When detecting that ambient humidity is low, opens humidifier and environment is humidified, when detecting environment When humidity is high, opens dehumidifier and dehumidify to environment.Direct conditioning method needs frequently to apply cold and hot and dry and wet change Change and adjust, energy consumption is high, and traditional compressor refrigeration, electric heating warming mode, and general device volume is larger, required components dress Complexity is set, interference constantly is brought to calibrating with vibration during calibration operation, it is also higher to external power requirement.

Traditional temperature/humidity control method there are aiming at the problem that, in terms of temperature control, the utility model use semiconductor The mode of temperature control controls temperature, i.e., is controlled by semiconductor thermoelectric temp-controlling element 11 temperature.Semiconductor refrigerating The advantages that with small in size, response is fast, shockproof, and precision is high, easy to operate, and it is noiseless, and equipment, which is stablized to meet, examined and determine Range request.But its operating power is often limited, and being frequently used in volume not is especially greatly, and temperature requirement is not extra high place. Semiconductor refrigerating is built upon on peltier effect basis.Peltier effect is also referred to as pyroelectric effect, thermoelectric effect, when P-type semiconductor and n-type semiconductor are linked together, connected as galvanic couple, the current direction for flowing through circuit is different, leads two and half The junction of body can generate heat release and endothermic effect.Semiconductor thermoelectric temp-controlling element 11 is temperature controlled core element, is passed through The sense of current and size of semiconductor thermoelectric temp-controlling element 11 are flowed through in control, to control refrigeration or heating and cold and hot degree.

In the embodiments of the present invention, by humidifier 9 and cooling dehumidifier 10 to the temperature and humidity in chamber 2 into Row control.The vertification regulation of pressure measurement utensil, humidity are generally required lower than 85% or 80%, so in extreme air item Cooling dehumidifier 10 is opened under part, humidifier 9 will not generally be opened.In the case where being required to humidity lower limit, and When local humidity is excessively dry, opens humidifier 9 and air is humidified.

Multiple groups Temperature Humidity Sensor 15 is placed in certificate test room 4, for the environmental condition in real-time measurement case.It is warm and humid It spends sensor 15 and generally uses wet-and-dry-bulb thermometer.Wet-and-dry-bulb thermometer is divided into dry bulb thermometer and wet-bulb thermometer, dry bulb temperature Degree meter is the common thermometer for measuring air themperature, and wet-bulb thermometer refers to the thermometer that bulb surface keeps wet, wet Temperature measured by globe thermometer is related to ambient humidity, and air humidity is bigger, and wet and dry bulb temperature difference is smaller, and air humidity is got over Small, wet-bulb depression is also bigger, reflects air humidity by difference variation dry, between wet-bulb thermometer.Temperature and humidity passes Sensor 15 can also use other high-precision Temperature Humidity Sensors.

Preferably, three groups of temperature and humidity sensings are set, the indoor ambient temperature and humidity condition of real-time monitoring calibration operation is used to.According to According to vertification regulation (JJF 1101-2003 " environmental test equipment temperature, humidity calibration specification " JJF 1376-2012 " box resistance Furnace calibrating standard "), three groups of Temperature Humidity Sensors are respectively placed in that certificate test room 4 is diagonal and the position at center.

As shown in Fig. 2, there is Temperature and Humidity Control setting operation button 32 in 1 outside front of metal shell and for show case inner ring Border condition digital display panel 33, operation button 32 and digital display panel 33 are connect with control circuit 13, can be set by operation button 32 Determine temperature and humidity required in case, temperature and humidity numerical value real-time as measured by Temperature Humidity Sensor 15 is in digital display panel 33 in case Upper real-time display.

Digital display panel 33 can be connect with by the control circuit 13 of core of single-chip microcontroller, can also be passed with the temperature and humidity in case Sensor 15, humidifier 9, cooling dehumidifier 10, the equipment phase such as semiconductor thermoelectric temp-controlling element 11, inlet fans 8, outlet fan 12 Even.Temperature and humidity adjustment control is carried out for temperature and humidity in the case of feedback by PID control or H-bridge circuit.

Positive lower end has external power supply socket 34 and built-in device conducting wire to draw outlet 35 outside metal shell 1.External power supply Socket 34 can connect the work of external power supply starting device, also can be used built in equipment in the case where no external power supply High-capacity lithium-ion is rechargeable battery powered.Earth lead 36 is drawn on 1 surface of metal shell, is connected with the earth, it can be by surface Charge export.

Chamber uses metal shell 1, and tested instrument and standard are all placed in 2 internal work of chamber, conducting wire and data Transmission line is drawn via wire outlet 35.The cabinet of metal shell 1 is equivalent to faraday cup (Faraday Cage), outside metal The grounded conducting wire 36 in shell surface is directly connected to big ground, and wired earth can achieve electrostatic screen, antimagnetic demagnetization and other effects.

The signal collected of Temperature Humidity Sensor 15 can be shown in digital display panel 33, and the signal is put by signal Big circuit is connected with control circuit 13.Control circuit 13 completes constant temperature and humidity control algolithm (generally using PID method), through data point After analysing calculation process, (including add by output port output signal, then through control signal output amplifier and the component that works Wet device 9, cooling dehumidifier 10 and semiconductor thermoelectric temp-controlling element 11) and these work components power supply be connected.Inlet fans 8 Start in the state of working component work with outlet fan 12, the air that temperature and humidity is regulated in air conditioning room 5 is blown Enter calibration operation room, and is recycled between certificate test room 4 and air conditioning room 5.Under conditions of component stops working, enter One's intention as revealed in what one says fan 8 and outlet fan 12 stop working, and keep case vivo environment conditions constant.

The air that temperature and humidity is regulated in air conditioning room 5, the rotation through passing through fan recycle in certificate test room 4, adjust The air saved is recycled according to direction shown in the arrow in Fig. 1.

Vertification regulation (JJG 1107- of the humidifier 9 in the lower part of air conditioning room 5, according to automatic normal pressure generator 2015), the vertification regulation (JJG 875-2005) of digital pressure gauge, it is desirable that envionmental humidity is not more than 85%, pressure sensing Device (static state) vertification regulation (JJG 860-94) relative humidity is less than 80%, dynamic pressure transducer (JJG 624-2005), phase To humidity less than 75%, northern environment humidity is not achieved 85% under normal circumstances, unless rain and snow weather etc. is special in extreme weather Under environment, cooling dehumidifier 10 can be just opened, the air in chamber 2 is subjected to dehumidification treatments.It is examined and determine according to pressure transmitter Regulation (JJG 882-2004), envionmental humidity require 45%-75%.Due to being required to humidity lower limit, in dry environment Under need to open humidifier 9, in case humidity carry out humidification process.

Temperature adjusting is controlled using semiconductor thermoelectric temp-controlling element 11, and temperature-controlled precision reaches 0.1 °C, significantly larger than Requirement of the vertification regulation to temperature fluctuation.

Humidifier 9, the control terminal of cooling dehumidifier 10 and semiconductor thermoelectric temp-controlling element 11 and Temperature Humidity Sensor 15 Output end is connected via control circuit 13.The course of work is as follows, when temperature sensor 15 detects the temperature in chamber than behaviour Make 32 predetermined temperature value of button it is low when, semiconductor thermoelectric temp-controlling element 11 open heating work state, work as temperature sensing When device 15 detects that the temperature in case is higher than predetermined temperature value, semiconductor thermoelectric temp-controlling element 11 opens refrigeration work shape State, iterative cycles, so that temperature moves closer to setting value.When humidity sensor 15 detects that the relative humidity in chamber is higher than When setting humidity value, cooling dehumidifier 10 is opened, and is dehumidified to air in case.The adjusting control algolithm of temperature and humidity, is generally adopted With PID method, temperature and humidity is regulated and controled.

Traditional air cycle refrigeration, electric heating heating need heating refrigeration two systems, and structure is complicated, and energy consumption is high, and With vibration, temperature control is carried out using semicondcutor thermoelements, it is only necessary to set of system, and the course of work does not shake, temperature control essence Du Genggao, it is only necessary to which the flow direction and size for controlling electric current can accurately control temperature.

Steam humidification method cooperation small-scale ultrasonic device can be used in humidifier 9.

In one example, foam heat-insulation layer 7 is set between chamber 2 and metal shell 1.Foam heat-insulation layer 7 can be used Polyurethane foam insulation layer, insulating layer thermal coefficient is small, plays the role of insulation to equipment, and anti seismic efficiency is good.

Preferred 1.5m × the 1.2m of 1 internal diameter of metal shell body × 0.8m (length × width × height), which can Standard and tested device to be all placed in cabinet and test.In the actual operation process, box sizes can also be subtracted Small is half, but needs two sets of cabinets, places standard and tested device respectively, is connected between the two using conducting wire.

The vibration of environment and external magnetic field interference, also have a great impact to pressure indicating value measurement result.Eliminate the shadow of vibration It rings, means include weakening, vibration isolation, absorbing, the means such as resistance vibration.Common shock-dampening method further includes air cushion shock, air spring, position The control methods such as displacement sensor spring control.

As shown in Figure 1, vibration-damped table includes vibration-damped table table top 18, crash roll 19 and husky cylinder 24.

Husky cylinder 24 includes steel cylinder 21 and the grains of sand 22 and cobblestone 23 that are filled in inside the steel cylinder.The crash roll 19 is Microcellular rubber crash roll or air cushion, area is identical as vibration-damped table table top 18, with a thickness of 14~16cm, preferably to 15cm.It is described It is separated between the grains of sand 22 and crash roll 19 with wooden unit sheet rubber multilayered structure 20.Vibration-damped table table top 18 and crash roll 19 are placed on steel On cylinder 21.Rubber paddle blade 25 or recyclable wheel 26 are installed under vibration-damped table.

Wherein, vibration-damped table table top 18 is preferably marble countertop, granite table top can also be used, for placing chamber And tested equipment.Its length and width is greater than metal shell 1, with a thickness of 2~4cm, preferably 3cm.If using materials such as steel plates, meeting Since elastic deformation causes shockproof effect to deteriorate.Marble countertop is small in deformation quantity when putting weight, its deformation can be made to reduce and (rung Should be uniform), can preferably it achieve the effect that shockproof.

For 18 underlay of vibration-damped table table top with crash roll 19, material is microcellular rubber crash roll or air cushion.Microcellular rubber has Light, wear-resisting, the performances such as shockproof can eliminate the hard contact between work top and ground using microcellular rubber resilient cushion, rise To buffer function.Microcellular rubber has high resiliency, crack resistance, the performances such as high plastic state.The unique viscoelastic property of rubber material, tool The features such as standby lag, damping and reversible large deformation, therefore there is good damping, sound insulation and cushion performance, it is widely used in suction Receive impact and isolation vibration.And microcellular rubber can be exposed to the sun and use under wet environment, be also equipped with light-weight, antifatigue, drop The advantages that low noise, permeability is strong, durable.Under certain pressure conditions, buffer capacity is preferable for microcellular rubber, if pressure Power is excessive, and the pressure-bearing time is longer, and microcellular rubber will follow the string.So take out tested equipment generally after work, It avoids being placed on table top for a long time, causes deformation irrecoverable.Since the comprehensive performance of natural rubber (NR) is best, with metal Part cement properties are good, and resistance to extreme condition, electrical insulating property and processing performance might as well.Microcellular rubber crash roll is typically chosen natural rubber Glue.

The buffering antihunt action of vibration-damped table 3 can make pressure meter tool still be able to carry out work under rugged environment Make.The resultant effect that the various precautions against earthquakes series and parallels that vibration-damped table 3 is used get up is highly desirable.Using preceding by vibration-damped table The level of table top 18, which is done, carefully calibrates, and guarantees plateau levels.Vibration-damped table 3 is lower to place 4 recyclable wheels, is used for nigration Case and vibration-damped table.4 recyclable wheels are packed up in the operating condition, and the rubber paddle blade 25 under vibration-damped table 3 contacts ground.

It will be understood by those skilled in the art that above to the purpose of the description of the embodiments of the present invention only for exemplary Ground illustrates the beneficial effect of the embodiments of the present invention, is not intended to given by being limited to the embodiments of the present invention Any example.

Each embodiment of the utility model is described above, above description is exemplary, and non-exclusive, and And it is also not necessarily limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for Many modifications and changes are obvious for those skilled in the art.

Claims (9)

1. a kind of pressure measurement utensil examines and determine environment test device, which is characterized in that including metal shell, chamber and damping Platform, in which:

Be equipped with the air conditioning room and certificate test room of upper and lower part connection inside the chamber, the air conditioning room from Under it is supreme successively include the inlet fans connected to the control circuit, humidifier, cooling dehumidifier, semi-conductor electricity backing and one's intention as revealed in what one says out Fan, the control circuit are arranged on the chamber side wall；Multiple groups Temperature Humidity Sensor is set in the certificate test room；

The vibration-damped table includes vibration-damped table table top, crash roll, husky cylinder, and the crash roll supports the vibration-damped table table top, and cloth It sets on the inside of the barrel of the husky cylinder.

2. pressure measurement utensil according to claim 1 examines and determine environment test device, which is characterized in that the metal shell It is equipped with the behaviour for the digital display panel of environmental condition in show case and for temperature and humidity to be arranged connecting with the control circuit Make button, earth lead.

3. pressure measurement utensil according to claim 1 examines and determine environment test device, which is characterized in that the metal shell Foam heat-insulation layer is provided between body and the chamber.

4. pressure measurement utensil according to claim 1 examines and determine environment test device, which is characterized in that the certificate test Three groups of Temperature Humidity Sensors of indoor setting, are separately positioned on certificate test room diagonal position and center.

5. pressure measurement utensil according to claim 1 examines and determine environment test device, which is characterized in that the vibration-damped table platform Face uses marble countertop, and length and width is greater than the chamber, with a thickness of 2~4cm.

6. pressure measurement utensil according to claim 1 examines and determine environment test device, which is characterized in that the sand cylinder includes Steel cylinder and the grains of sand and cobblestone being filled in inside the steel cylinder.

7. pressure measurement utensil according to claim 1 examines and determine environment test device, which is characterized in that the crash roll is Microcellular rubber crash roll or air cushion, area is identical as vibration-damped table table top, with a thickness of 14~16cm.

8. pressure measurement utensil according to claim 1 examines and determine environment test device, which is characterized in that the sand cylinder and anti- It is separated between shake pad with wooden unit sheet rubber multilayered structure.

9. pressure measurement utensil according to claim 1 examines and determine environment test device, which is characterized in that under the vibration-damped table Rubber paddle blade or recyclable wheel are installed.