An isolated environment overpressure monitoring and measurement system

Abstract

The present invention belongs to the technical field of isolated environment pressure monitoring, and discloses an isolated environment overpressure monitoring and measuring system, including a two-stage pressure monitor, which is installed outside the isolated environment and connected to the inside of the isolated environment; a cold nitrogen storage tank, which is connected to the two-stage pressure monitor for cooling the two-stage pressure monitor; a cooling water tank, which is connected to the two-stage pressure monitor for auxiliary cooling of the two-stage pressure monitor; the two-stage pressure monitor includes a primary pressure-guiding pipe and a secondary pressure-guiding pipe spliced ​​to each other through flanges. A temperature sensor 2 is provided on the secondary pressure-guiding pipe, which measures the temperature in the pressure-guiding chamber 2 by direct contact method, and cooperates with a control unit to monitor it in real time. When the temperature therein rises to outside the threshold range, the control unit drives the pump of the cold nitrogen storage tank to inject circulating cold nitrogen into the heat exchange chamber 3 provided on the secondary pressure-guiding pipe to accelerate heat exchange.

Description

Technical Field

[0001] The invention belongs to the technical field of isolated environment pressure monitoring, and in particular is an isolated environment overpressure monitoring and measuring system. Background Art

[0002] Pressure monitoring is very important in industrial production and related scientific research and military fields, and it is data that needs to be observed. Since pressure in industrial and scientific research environments is basically a dynamic constant that changes all the time, such as industrial boilers and explosion tests. This type of environment also includes instantaneous changes in pressure and temperature, and even overpressure and high temperature environments. Accurate pressure measurement in this environment plays a vital role in the accuracy of experimental results and the safety of industrial production. At present, pressure measurement in high temperature and high pressure environments is carried out by connecting a pressure guide tube to the isolated environment and leading the pressure therein to the pressure sensor. However, the pressure guide tube cannot directly block the ambient temperature. Although the traditional piezoelectric pressure sensor has a high accuracy in measuring dynamic pressure, its working efficiency is limited in a high temperature environment. If a longer pressure guide tube is used to reserve a cooling buffer interval, it will also affect the measurement accuracy.

[0003] Therefore, the present application proposes an isolated environment overpressure monitoring and measurement system to overcome the above-mentioned defects. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides an isolated environment overpressure monitoring and measurement system.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an isolated environment overpressure monitoring and measurement system, comprising a two-stage pressure monitor, which is installed outside the isolated environment and communicated with the inside of the isolated environment;

[0006] A cold nitrogen storage tank, which is connected to the two-stage pressure monitor and is used to cool the two-stage pressure monitor;

[0007] A cooling water tank, which is connected to the two-stage pressure monitor and is used to assist in cooling the two-stage pressure monitor;

[0008] The two-stage pressure monitor comprises a primary pressure-inducing pipe and a secondary pressure-inducing pipe connected to each other by flanges, the primary pressure-inducing pipe and the secondary pressure-inducing pipe respectively comprise two mutually isolated pressure-inducing chambers 1 and 2, the pressure-inducing chamber 2 is connected to the isolated environment, the pressure-inducing chamber 1 is filled with fluid and is isolated from the pressure-inducing chamber 2 by an isolation layer;

[0009] The secondary pressure-inducing pipe is also provided with a heat exchange chamber 3 and is connected to the cold nitrogen storage tank through a drainage interface 2. The secondary pressure-inducing pipe is provided with a temperature sensor 2 for monitoring the temperature in the pressure-inducing chamber 2;

[0010] The first-level pressure-inducing pipe is provided with a pressure sensor and a temperature sensor 1 for monitoring the pressure and temperature of the pressure-inducing chamber 1 respectively.

[0011] Preferably, the first-level pressure-inducing pipe also includes a water-cooled heat exchange chamber 1 that is arranged around the outer periphery of the pressure-inducing chamber 1. The water-cooled heat exchange chamber 1 is connected to the cooling water tank through a drainage interface 1 to form a cooling water circulation system. A water-cooled heat exchange chamber 2 is inserted in the middle of the pressure-inducing chamber 1 and is connected to the water-cooled heat exchange chamber 1.

[0012] Preferably, the isolation layer is crimped between the flanges of the primary pressure-inducing pipe and the secondary pressure-inducing pipe;

[0013] The isolation layer comprises a sealing ring, a double-layer bonded diaphragm is arranged on the inner side of the sealing ring, and a steel wire reinforcement layer is arranged between the double-layer bonded diaphragm interlayers.

[0014] Preferably, a piston block is provided in the interference sleeve in the inner cavity of the second pressure-inducing cavity, and the top of the piston block is supported on the bottom of the isolation layer;

[0015] The inner cavity wall of the second pressure-inducing cavity is provided with a limit block supported on the bottom of the piston block.

[0016] Preferably, the piston block is formed by splicing two piston units with screws, and circular grooves are provided on the two piston units to form an internal isolation cavity after splicing.

[0017] Preferably, the temperature sensor 1 and the temperature sensor 2 are thermocouple sensors.

[0018] Preferably, the fluid filled in the pressure-inducing chamber 1 is hydraulic oil.

[0019] Preferably, the heat exchange chamber three and the isolation cavity have the same horizontal height, and the cavity height of the heat exchange chamber three is not less than the cavity height of the isolation cavity.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention is provided with a two-stage pressure monitor outside the isolated environment and is connected to the internal environment through a secondary pressure-guiding pipe for pressure conduction. A pressure sensor is provided on the primary pressure-guiding pipe for monitoring the pressure of the isolated environment, and the primary pressure-guiding pipe and the secondary pressure-guiding pipe are in an isolated state through the setting of an isolation layer, and the pressure is conducted through the fluid working medium in the pressure-guiding chamber one. The temperature rise caused by direct contact is prevented from causing inaccurate monitoring results of the pressure sensor. In addition, a temperature sensor 2 is provided on the secondary pressure-guiding pipe, which measures the temperature in the pressure-guiding chamber two by a direct contact method, and cooperates with the control unit to monitor it in real time. When the temperature therein rises to outside the threshold range, the control unit drives the pump of the cold nitrogen storage tank to inject circulating cold nitrogen into the heat exchange chamber three arranged on the secondary pressure-guiding pipe to accelerate heat exchange. It is used to quickly reduce the temperature in the pressure-guiding chamber two to avoid large heat being conducted to the working medium of the pressure-guiding chamber one.

[0022] By setting a piston block in the pressure chamber 2 to block the direct transfer of heat, the piston block directly receives the pressure shock in the isolated environment of the pressure chamber 2, and initially blocks the instantaneous heat that may be generated. Then, the cold nitrogen gas that is pressurized and diverted through the drainage interface 2 directly cools the piston block, giving the system reaction time under instantaneous working conditions and protecting the pressure chamber 1 and the isolation layer above. In addition, the cold nitrogen gas is used to perform heat exchange on the thinner parts of the piston block, thereby improving the heat exchange efficiency and further strengthening the thermal isolation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the overpressure monitoring and measuring system of the present invention;

[0024] Figure 2 It is a structural diagram of the two-stage pressure monitor of the present invention;

[0025] Figure 3 is an internal cross-sectional view of a two-stage pressure monitor of the present invention;

[0026] Figure 4 It is a cross-sectional view of the internal structure of the first-level pressure-inducing pipe of the present invention;

[0027] Figure 5 A top view of the internal structure of the secondary pressure-inducing tube of the present invention;

[0028] Figure 6 It is a schematic diagram of disassembling the isolation layer of the present invention.

[0029] In the figure: 100, two-stage pressure monitor; 101, first-stage pressure-leading pipe; 1011, water-cooled heat exchange chamber one; 1012, water-cooled heat exchange chamber two; 1013, pressure-leading chamber one; 1014, drainage interface one; 102, second-stage pressure-leading pipe; 1021, pressure-leading chamber two; 1022, drainage interface two; 1023, heat exchange chamber three; 103, piston block; 1031, isolation cavity; 104, isolation layer; 1041, sealing ring; 1042, diaphragm; 1043, steel wire reinforcement layer; 105, pressure sensor; 106, temperature sensor one; 107, temperature sensor two; 200, cold nitrogen storage tank; 300, cooling water tank. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figures 1 to 6 As shown, the present invention provides an isolated environment overpressure monitoring and measuring system, including a two-stage pressure monitor 100, which is installed outside the isolated environment and communicated with the inside of the isolated environment;

[0032] A cold nitrogen storage tank 200, which is connected to the two-stage pressure monitor 100 and is used for cooling the two-stage pressure monitor 100;

[0033] A cooling water tank 300, which is in communication with the two-stage pressure monitor 100 and is used to assist in cooling the two-stage pressure monitor 100;

[0034] The two-stage pressure monitor 100 includes a primary pressure-inducing pipe 101 and a secondary pressure-inducing pipe 102 which are connected to each other through flanges. The primary pressure-inducing pipe 101 and the secondary pressure-inducing pipe 102 respectively include two mutually isolated pressure-inducing chambers 1 1013 and 1021. The pressure-inducing chamber 1021 is connected to the isolated environment. The pressure-inducing chamber 1 1013 is filled with fluid and is isolated from the pressure-inducing chamber 1021 through an isolation layer 104.

[0035] The secondary pressure-inducing pipe 102 is also provided with a heat exchange chamber 3 1023 and is connected to the cold nitrogen storage tank 200 through the drainage interface 2 1022. The secondary pressure-inducing pipe 102 is provided with a temperature sensor 2 107 for monitoring the temperature in the pressure-inducing chamber 2 1021.

[0036] The first-level pressure-inducing pipe 101 is provided with a pressure sensor 105 and a temperature sensor 106 for monitoring the pressure and temperature of the pressure-inducing chamber 1013 respectively.

[0037] The two-stage pressure monitor 100 is arranged outside the isolation environment and is connected to the internal environment through the secondary pressure-inducing pipe 102 for pressure conduction. A pressure sensor 105 is arranged on the primary pressure-inducing pipe 101 for monitoring the pressure of the isolation environment. The primary pressure-inducing pipe 101 and the secondary pressure-inducing pipe 102 are isolated by the isolation layer 104, so that the working medium in the isolation environment cannot directly contact the primary pressure-inducing pipe 101, but conducts pressure through the fluid working medium in the pressure-inducing chamber 1 1013. Prevent the temperature from rising suddenly due to direct contact, which causes the monitoring result of the pressure sensor 105 to be inaccurate. In addition, a temperature sensor 2 107 is arranged on the secondary pressure-inducing pipe 102, which measures the temperature in the pressure-inducing chamber 2 1021 by direct contact method, and cooperates with the control unit to monitor it in real time. When the temperature rises beyond the threshold range, the control unit drives the pump of the cold nitrogen storage tank 200 to inject circulating cold nitrogen into the heat exchange chamber 3 1023 arranged on the secondary pressure-inducing pipe 102 to accelerate heat exchange.

[0038] like Figures 1 to 4 As shown, the first-level pressure-inducing pipe 101 also includes a water-cooled heat exchange chamber 1011 that is arranged around the outer periphery of the pressure-inducing chamber 1013. The water-cooled heat exchange chamber 1011 is connected to the cooling water tank 300 through a drainage interface 1014 to form a cooling water circulation system. A water-cooled heat exchange chamber 2 1012 is inserted in the middle of the pressure-inducing chamber 1013 and is connected to the water-cooled heat exchange chamber 1011.

[0039] The water-cooled heat exchange chamber 1011 is mainly an annular cooling chamber opened outside the pressure chamber 1013, and the water-cooled heat exchange chamber 2 1012 is inserted therethrough to further evenly exchange heat for the fluid working medium in the pressure chamber 1013. The main function of the water-cooled heat exchange chamber 1 1011 and the water-cooled heat exchange chamber 2 1012 is to maintain the normal working environment temperature of the fluid working medium therein. Due to the existence of the isolation system in the above scheme, the influence of the temperature in the secondary pressure-inducing pipe 102 on the temperature in the internal cavity of the primary pressure-inducing pipe 101 has been greatly weakened. Therefore, the water-cooled heat exchange chamber 1 1011 and the water-cooled heat exchange chamber 2 1012 are mainly responsible for maintaining the temperature of the fluid working medium therein within the normal working range, and are used to prevent the temperature from continuously rising. If water-cooled heat exchange chamber 1011 and water-cooled heat exchange chamber 2 1012 are not provided to cooperate with the continuous heat dissipation treatment, the continuous temperature rise will eventually cause the temperature of the fluid working medium in the pressure-inducing chamber 1013 to rise, resulting in significant changes in its viscosity and wear resistance, which will in turn have a negative impact on the pressure measurement.

[0040] The cooling water circulation system is always turned on. When the temperature sensor 106 detects that the temperature of the fluid in the pressure chamber 1013 deviates from the benign range, the control unit drives the water pump of the cooling water tank 300 to speed up the heat exchange speed of the pump water to achieve a rapid cooling effect.

[0041] like Figure 3 and Figure 6 As shown, the isolation layer 104 is crimped between the flanges of the primary pressure-inducing pipe 101 and the secondary pressure-inducing pipe 102;

[0042] The isolation layer 104 includes a sealing ring 1041 , a double-layered bonded diaphragm 1042 is arranged on the inner side of the sealing ring 1041 , and a steel wire reinforcement layer 1043 is arranged between the layers of the double-layered bonded diaphragm 1042 .

[0043] The isolation layer 104 is double-layered by thermal bonding, and the steel wire reinforcement layer 1043 is fixed in the interlayer by thermal bonding. The above arrangement is used to improve the compressive strength of the isolation layer 104, and due to its good elastic deformation ability, it has sensitive pressure transmission ability. The sealing ring 1041 is made of copper and has good elastic deformation ability. Through the hard contact and extrusion of the upper and lower flanges, the interface is effectively sealed to prevent pressure leakage. The diaphragm 1042 is made of polypropylene, which has strong elasticity and pressure resistance.

[0044] like Figure 3 As shown, a piston block 103 is provided in the inner cavity of the second pressure-inducing cavity 1021 through an interference sleeve, and the top of the piston block 103 is supported on the bottom of the isolation layer 104;

[0045] The inner wall of the second pressure-inducing chamber 1021 is provided with a limit block supported on the bottom of the piston block 103 .

[0046] The piston block 103 is made of aluminum alloy, which is light and wear-resistant. The piston block 103 is used for blocking to effectively block the direct transfer of heat. The piston block 103 directly receives the pressure shock in the isolated environment in the pressure chamber 1021, and initially blocks the instantaneous heat that may be generated by the heat. Then, the cold nitrogen gas that is pressurized and diverted through the drainage interface 1022 directly cools the piston block 103, giving the system reaction time under instantaneous working conditions and protecting the pressure chamber 1013 and the isolation layer 104 above. The limit block on the inner wall of the pressure chamber 1021 supports its bottom, so that the top of the piston block 103 and the bottom of the isolation layer 104 are in a mutually extruded contact state in the initial state.

[0047] like Figure 3 As shown, the piston block 103 is formed by splicing two piston units with screws, and circular grooves are provided on the two piston units to form an internal isolation cavity 1031 after splicing.

[0048] The piston block 103 adopts a two-unit splicing configuration, which is intended to isolate the temperature of the upper and lower units. The joint between the two units can be coated with heat-insulating silicone or heat-insulating sheets to effectively isolate the heat conduction between the upper and lower units. There are circular grooves on both piston units, and the two circular grooves are connected to form an isolation cavity 1031. The cavity here is also used for heat insulation, which greatly reduces the heat conduction area between the two units and greatly reduces the heat conduction efficiency.

[0049] like Figure 1 and Figure 2 As shown, temperature sensor 1 106 and temperature sensor 2 107 are thermocouple sensors.

[0050] Thermocouple sensors have a high temperature measurement range and very strong stability and anti-interference performance. In this system, the ambient temperature may be as high as hundreds of degrees Celsius, and the instantaneous temperature may be higher. The larger temperature measurement range of thermocouple sensors can better adapt to system requirements. And through this contact temperature measurement method, the temperature conditions obtained are relatively accurate.

[0051] like Figure 3 As shown, the fluid filled in the pressure-inducing chamber 1013 is hydraulic oil.

[0052] Hydraulic oil has the characteristic of extremely low compressibility under normal working temperature. It has very high precision in pressure and energy transmission, and has multiple effects such as anti-rust, lubrication and sealing. In addition, during long-term working, its excellent anti-foaming performance can ensure its accuracy and sensitivity in dynamic working environment, and effectively avoid the oxidation of fluid working medium.

[0053] like Figure 3 As shown, the heat exchange cavity three 1023 and the isolation cavity 1031 have the same horizontal height, and the cavity height of the heat exchange cavity three 1023 is not less than the cavity height of the isolation cavity 1031.

[0054] The heat exchange chamber 3 1023 is at the same level as the isolation cavity 1031, which can ensure contact with the thinner peripheral surface of the piston block 103 and quickly cool down the area. The upper and lower piston units of the piston block 103 are isolated from each other, keeping the upper piston block 103 unit at a relatively low temperature. The cavity height of the heat exchange chamber 3 1023 is greater than the cavity height of the isolation cavity 1031 so that the cooling space of the cold nitrogen in the heat exchange chamber 3 1023 can ensure full coverage of the thinner part of the outer wall of the isolation cavity 1031.

[0055] At the same time, the bottom of the heat exchange chamber three 1023 does not extend downward to the bottom of the piston block 103 , and there is a certain gap between it and the lower inner cavity of the pressure chamber two 1021 to prevent it from significantly reducing the temperature in the pressure chamber two 1021 .

[0056] The working principle and use process of the present invention:

[0057] The two-stage pressure monitor 100 is arranged outside the isolated environment and is connected to the internal environment through the secondary pressure-guiding pipe 102 for pressure guidance. The primary pressure-guiding pipe 101 is provided with a pressure sensor 105 for monitoring the pressure of the isolated environment. The primary pressure-guiding pipe 101 and the secondary pressure-guiding pipe 102 are in an isolated state through the setting of the isolation layer 104, and the pressure is conducted through the fluid working medium in the pressure-guiding chamber 1 1013. A temperature sensor 2 107 is arranged on the secondary pressure-guiding pipe 102, which measures the temperature in the pressure-guiding chamber 2 1021 by direct contact method, and cooperates with the control unit to monitor it in real time. When the temperature rises to outside the threshold range, the control unit drives the pump of the cold nitrogen storage tank 200 to inject circulating cold nitrogen into the heat exchange chamber 3 1023 arranged on the secondary pressure-guiding pipe 102 to accelerate heat exchange.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] 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 variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An isolated environment overpressure monitoring and measurement system, characterized in that: It comprises a two-stage pressure monitor (100), which is installed outside the isolation environment and communicates with the inside of the isolation environment; A cold nitrogen storage tank (200), which is connected to the two-stage pressure monitor (100) and is used to cool the two-stage pressure monitor (100); A cooling water tank (300) which is in communication with the two-stage pressure monitor (100) and is used to assist in cooling the two-stage pressure monitor (100); The two-stage pressure monitor (100) comprises a first-stage pressure-inducing pipe (101) and a second-stage pressure-inducing pipe (102) which are connected to each other via flanges, the first-stage pressure-inducing pipe (101) and the second-stage pressure-inducing pipe (102) respectively comprising two mutually isolated pressure-inducing chambers 1 (1013) and 2 (1021), the 2 (1021) being in communication with an isolated environment, the 1 (1013) being filled with a fluid and being isolated from the 2 (1021) pressure-inducing chamber by an isolation layer (104); The secondary pressure-inducing pipe (102) is also provided with a heat exchange chamber three (1023) and is connected to the cold nitrogen storage tank (200) via a drainage interface two (1022); the secondary pressure-inducing pipe (102) is provided with a temperature sensor two (107) for monitoring the temperature in the pressure-inducing chamber two (1021); The first-level pressure-inducing pipe (101) is provided with a pressure sensor (105) and a temperature sensor (106) for monitoring the pressure and temperature of the first pressure-inducing chamber (1013) respectively; A piston block (103) is provided in the interference sleeve in the inner cavity of the second pressure-inducing cavity (1021), and the top of the piston block (103) is supported on the bottom of the isolation layer (104); The inner cavity wall of the second pressure-inducing cavity (1021) is provided with a limit block supported on the bottom of the piston block (103); The piston block (103) is formed by splicing two piston units using screws, and circular grooves are provided on the two piston units to form an internal isolation cavity (1031) after splicing.

2. The isolated environment overpressure monitoring and measurement system according to claim 1, characterized in that: The first-level pressure-inducing pipe (101) also includes a water-cooled heat exchange chamber (1011) that is arranged around the outer periphery of the pressure-inducing chamber (1013); the water-cooled heat exchange chamber (1011) is connected to the cooling water tank (300) via a drainage interface (1014) to form a cooling water circulation system; a water-cooled heat exchange chamber (1012) is inserted in the middle of the pressure-inducing chamber (1013) and is connected to the water-cooled heat exchange chamber (1011).

3. The isolated environment overpressure monitoring and measurement system according to claim 1, characterized in that: The isolation layer (104) is crimped between the flanges of the primary pressure-inducing pipe (101) and the secondary pressure-inducing pipe (102); The isolation layer (104) comprises a sealing ring (1041), a double-layer bonded diaphragm (1042) is arranged on the inner side of the sealing ring (1041), and a steel wire reinforcement layer (1043) is arranged between the layers of the double-layer bonded diaphragm (1042).

4. The isolated environment overpressure monitoring and measurement system according to claim 1, characterized in that: The temperature sensor 1 (106) and the temperature sensor 2 (107) are thermocouple sensors.

5. The isolated environment overpressure monitoring and measurement system according to claim 1, characterized in that: The fluid medium filled in the pressure-inducing chamber 1 (1013) is hydraulic oil.

6. The isolated environment overpressure monitoring and measurement system according to claim 1, characterized in that: The heat exchange chamber three (1023) and the isolation cavity (1031) have the same horizontal height, and the cavity height of the heat exchange chamber three (1023) is not less than the cavity height of the isolation cavity (1031).

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