CN-121993779-A - Nitrogen compensation closed-loop circulation type constant-temperature saturated mercury vapor generator

CN121993779ACN 121993779 ACN121993779 ACN 121993779ACN-121993779-A

Abstract

The invention discloses a nitrogen compensation closed-loop circulation type constant-temperature saturated mercury vapor generator, which relates to the technical field of calibration of analytical instruments and environmental monitoring, and comprises an openable external box body, an inner box panel, a water bath kettle, a mercury bottle and a regulating and controlling device, wherein the openable external box body is arranged outside the mercury vapor generator, the inside of openable outside box is equipped with the incasement panel of being fixed by apron fixing bolt, and the lower part of incasement panel is equipped with sealed baffle, is equipped with the water bath in the left side space of sealed baffle, is equipped with the mercury bottle in the water bath, is equipped with regulation and control device in the right side space of sealed baffle. The invention forms an integrated, self-contained and zero-leakage saturated mercury vapor generator through a closed structural design and adjustable fixing measures, and provides a safe, convenient, accurate and stable saturated mercury vapor source for low-frequency and micro-instrument calibration work through a closed cycle and intelligent nitrogen compensation technology under the condition of no need of an external air source.

Inventors

ZHANG YANAN
Hu Leyin
ZHU SHIJUN
HUANG YONGHUI
SUN XIAORU
CHEN LIYI
WANG WEI
SUI YIYI

Assignees

北京市地震局

Dates

Publication Date: 20260508
Application Date: 20260319

Claims (8)

1. The utility model provides a nitrogen gas compensation closed cycle formula constant temperature saturated mercury vapor generator, its characterized in that, including openable outside box (1), case inner panel (2), water bath (3), mercury bottle (4), regulation and control device (5), mercury vapor generator's outside is equipped with openable outside box (1), openable outside box (1) inside is equipped with by apron fixing bolt fixed case inner panel (2), the lower part of case inner panel (2) is equipped with sealed baffle, be equipped with in the left side space of sealed baffle water bath (3), be equipped with in water bath (3) mercury bottle (4), be equipped with in the right side space of sealed baffle regulation and control device (5), The mercury bottle (4) comprises a fixing frame (40), a stainless steel fixing ring (41), a bottle body (42) and a bottle cap (43), wherein the fixing frame (40) is fixedly connected with the inside of the water bath kettle (3) in a threaded manner, the fixing frame (40) is provided with a surrounding stainless steel fixing ring (41), the stainless steel fixing ring (41) is provided with a hand-adjusting fastening nut (44), the bottle body (42) is fixedly clamped in the stainless steel fixing ring (41) through the hand-adjusting fastening nut (44), the bottle cap (43) is arranged on the bottle body (42), and a micro-circulation air outlet pipe (45), an air taking pipe (46) and a micro-circulation air inlet pipe (47) are respectively penetrated into the upper part of the bottle cap (43) from left to right; The utility model discloses a little pressure balance valve group (51), including regulation and control device (5), little pressure balance valve group (51), micro pressure difference changer (52), aluminium foil nitrogen bag (53), active carbon adsorption jar (54), the other end of little pressure difference changer (47) is connected with little circulating pump (50), the other end of little circulating pump (50) through three way valve (55) with right side connector one of two way pressure balance valve group (51) is connected, the third port of three way valve (55) is connected with three way valve two (56), the other end of three way valve two (56) is connected with right side connector two of two way pressure balance valve group (51), the third port of three way valve two (56) is connected with micro pressure difference changer (52), the other port of micro pressure difference changer (52) is connected with little circulating air outlet duct (45), the left side connector three of two way pressure balance valve group (51) is connected with aluminium foil nitrogen bag (53), the left side charcoal of two way balance valve group (51) is connected with active carbon adsorption jar (54).
2. A nitrogen-compensated closed-circuit circulation type constant temperature saturated mercury vapor generator as claimed in claim 1, characterized in that the openable external case (1) comprises a case (10), an upper hand-held ring (11), a side hand-held ring (12), a buckle (13) and a power socket (14), the upper portion of the case (10) is provided with the upper hand-held ring (11), both sides of the case (10) are provided with the side hand-held rings (12), an upper case cover of the case (10) is rotatably fixed on a lower case body, the front portions of the case cover and the case body are provided with the buckle (13), and the right side surface of the case (10) is provided with the power socket (14).
3. The nitrogen gas compensation closed-circuit circulation type constant-temperature saturated mercury vapor generator according to claim 1, wherein the inner box panel (2) comprises a display screen (20), a water bath temperature control button (21), a sampling port (22), a micro-circulation pump switch (23), a total power supply knob (24) and a cover plate fixing bolt (25), the display screen (20) is embedded in the upper left corner of the inner box panel (2), the water bath temperature control button (21) is arranged on the right side of the display screen (20), the sampling port (22) is arranged on the lower side of the display screen (20), the micro-circulation pump switch (23) is arranged on the right side of the sampling port (22), the total power supply knob (24) is arranged on the right side of the micro-circulation pump switch (23), the sampling port (22) is connected with the air taking pipe (46), and the inner box panel (2) is fixed on the openable external box body (1) through the cover plate fixing bolt (25).
4. A nitrogen-compensated closed-circuit constant-temperature saturated mercury vapor generator as claimed in claim 1 wherein said body (42) is a borosilicate glass bottle, said cap (43) is an integrally formed frosted glass cap, and a frosted seal is provided between said borosilicate glass bottle and said integrally formed frosted glass cap.
5. The nitrogen-compensated closed-circuit circulation type constant-temperature saturated mercury vapor generator as claimed in claim 1, wherein a power supply (57) and a balancing weight (58) are further arranged in the regulating device (5), the power supply (57) is electrically connected with the micro-circulation pump (50), the two-way pressure balance valve group (51) and the micro-pressure difference transmitter (52), and the balancing weight (58) is arranged in a right space of the sealing partition plate.
6. The nitrogen compensation closed-circuit circulation type constant-temperature saturated mercury vapor generator according to claim 1, wherein the water bath (3) comprises a pot body (30), a pot cover (31) and a pagoda joint (36), a plurality of fixing columns (32) are arranged on the inner wall of the left space of the sealing partition plate, the pot body (30) is clamped in the space inside the fixing columns (32), the space inside the fixing columns (32) is matched with the pot body (30), the pot cover (31) is covered on the upper part of the pot body (30), a plurality of cover body fixing bolts are arranged at the edge of the pot cover (31), the cover body fixing bolts are in threaded connection with the fixing columns (32), a water bath cover plate is provided with a pressure relief hole (33), the pot cover (31) is provided with three pagoda joints (36) for transmitting gas through a ring (45), a gas taking pipe (46) and a micro-circulation gas inlet pipe (47), The lower surface of the pot cover (31) at the upper part of the bottle cap (43) is provided with an adjustable mercury bottle fixing ejector rod (34), and a metal base cushion (35) is connected to the adjustable mercury bottle fixing ejector rod (34) in a threaded manner.
7. The nitrogen-compensated closed-circuit circulation type constant-temperature saturated mercury vapor generator as claimed in claim 1 is characterized in that connecting pipes for connection among a micro-circulation air outlet pipe (45), an air taking pipe (46), a micro-circulation air inlet pipe (47), a micro-circulation pump (50), a two-way pressure balance valve group (51), an activated carbon adsorption tank (54), an aluminum foil nitrogen bag (53) and a micro-pressure difference transmitter (52) are polytetrafluoroethylene pipes (37).
8. A nitrogen-compensated closed-circuit constant-temperature saturated mercury vapor generator as claimed in claim 1 wherein a high boron silica sand core filter plate (48) is arranged at the bottom of the inner wall of the bottle body (42).

Description

Nitrogen compensation closed-loop circulation type constant-temperature saturated mercury vapor generator Technical Field The invention relates to the technical field of calibration of analytical instruments and environmental monitoring, in particular to a nitrogen compensation closed-loop circulation type constant-temperature saturated mercury vapor generator. Background The traditional open-circuit purging type generator needs to be externally connected with a high-pressure nitrogen bottle, and the mercury bottle is continuously purged through carrier gas to generate saturated steam. The system has poor portability, potential leakage risk caused by more gas circuit interfaces, continuous consumption of high-purity gas and high use cost, and is mainly suitable for fixed laboratories. The simple static mercury bottle is only one sealed mercury bottle with constant temperature, and the vapor in the bottle is directly extracted during sampling. Each sampling can lead to pressure drop and vapor concentration drop in the bottle, the concentration can not be kept stable, negative pressure is formed after multiple sampling, and the operation is difficult and unsafe. The method can cause leakage of highly toxic mercury vapor due to improper operation or poor sealing of equipment, and the method is a threat to personnel health and environment. Disclosure of Invention The invention aims to provide a nitrogen compensation closed-loop circulation type constant-temperature saturated mercury vapor generator, which solves the problems that the potential leakage risk is caused by a plurality of air channel interfaces of the traditional open-loop sweeping type generator, high-purity gas is continuously consumed, the use cost is high, the concentration of a simple static mercury bottle cannot be kept stable, negative pressure is formed after sampling for a plurality of times, and the operation is difficult and unsafe. In order to achieve the above purpose, the present invention provides the following technical solutions: The utility model provides a nitrogen gas compensation closed-circuit circulation type constant temperature saturated mercury vapor generator, includes can open outside box, incasement panel, water bath, mercury bottle, regulation and control device, the outside of mercury vapor generator is equipped with can open outside box, can open the inside of outside box be equipped with by apron fixing bolt fixed the incasement panel, the lower part of incasement panel is equipped with sealed baffle, be equipped with in the left side space of sealed baffle the water bath is equipped with in the water bath, be equipped with in the water bath the mercury bottle, be equipped with in the right side space of sealed baffle the regulation and control device, The mercury bottle comprises a fixing frame, a stainless steel fixing ring, a bottle body and a bottle cap, wherein the fixing frame is fixedly connected with the inside of the water bath in a threaded manner, the fixing frame is provided with a surrounding stainless steel fixing ring, the stainless steel fixing ring is provided with a hand-adjusting fastening nut, the bottle body is fixedly clamped in the stainless steel fixing ring through the hand-adjusting fastening nut, the bottle cap is arranged on the bottle body, and a micro-circulation air outlet pipe, an air taking pipe and a micro-circulation air inlet pipe are respectively penetrated into the upper part of the bottle cap from left to right; The regulating and controlling device comprises a micro-circulation pump, a two-way pressure balance valve group, a micro-pressure difference transmitter, an aluminum foil nitrogen bag and an activated carbon adsorption tank, wherein the other end of a micro-circulation air inlet pipe is connected with the micro-circulation pump, the other end of the micro-circulation pump is connected with a right-side connecting port I of the two-way pressure balance valve group through a three-way valve I, a third port I of the three-way valve I is connected with a three-way valve II, the other end of the three-way valve II is connected with a right-side connecting port II of the two-way pressure balance valve group, a third port II of the three-way valve is connected with the micro-pressure difference transmitter, the other port I of the micro-pressure difference transmitter is connected with a micro-circulation air outlet pipe, a left-side connecting port III of the two-way pressure balance valve group is connected with the aluminum foil nitrogen bag, and a left-side connecting port IV of the two-way pressure balance valve group is connected with the activated carbon adsorption tank. Further, the openable external box body comprises a shell body, an upper hand-held ring, side hand-held rings, buckles and a power socket, wherein the upper portion of the shell body is provided with the upper hand-held ring, the side hand-held rings are arranged on two sides of the shell body, an upper