Integrated air blowing instrument and radioactive liquid detection system

Abstract

The present invention discloses an integrated air blowing instrument, including a housing, a differential pressure transmitter assembly, an air blowing assembly and an air flow connection assembly. The housing is provided with a plurality of installation positions, and the differential pressure transmitter assembly, the air blowing assembly and the air flow connection assembly are respectively detachably installed in each installation position, and the installation position of the air flow connection assembly is adjacent to the installation positions of other components. A pipeline is provided inside the air flow connection assembly, and a vent is provided on the surface. The differential pressure transmitter assembly and the air blowing assembly are both detachably connected to the vent, so as to realize air flow through the pipeline inside the air flow connection assembly. The integrated air blowing instrument of the present invention not only does not introduce human error, but also has good versatility and reusability, can be applied to various complex and changeable working conditions, and is easy to inspect and maintain. The present invention also provides a radioactive liquid detection system.

Description

Technical Field

[0001] The invention specifically relates to an integrated air blowing instrument and a radioactive liquid detection system. Background Art

[0002] The air blowing instrument is a non-contact measuring instrument with a very wide range of applications. Except for the air blowing pipe contacting the measured medium, other items are not in contact. It can measure clean liquids, and can also be used for corrosive, acid-base-salt, high-viscosity, high-temperature and easy-to-crystallize liquids. There are a large number of radioactive and corrosive liquids in the nuclear chemical industry, so the air blowing instrument is currently widely used in the nuclear chemical industry. It can solve the measurement of parameters such as liquid level, density, interface, etc. of highly radioactive liquids in nuclear industrial plants, and has obtained positive and good measurement results.

[0003] The air blowing instrument is composed of a differential pressure transmitter, an air blowing device and an air blowing pipeline. The composition of the air blowing device is relatively complex, consisting of a pressure reducing valve, a flow meter, a constant flow valve, etc. In the past, split air blowing instruments were generally used, and designers were required to design the differential pressure transmitter, the air blowing pipeline, the connection method, etc. separately. This increased the workload of designers and was prone to human errors, design errors, and errors during the construction process, all of which may cause the air blowing instrument to be unable to measure. In addition, due to the large number of instrument components, subsequent maintenance and overhaul are difficult, which is not conducive to the maintenance of the entire plant.

[0004] At present, with the development of integrated technology, integrated air blowing instruments are gradually being used. Integrated air blowing instruments bring all the components together to form a complete instrument product, reducing human errors of designers and construction personnel. However, due to the excessive number of components of the instrument, the air blowing pipelines inside the instrument are complicated, the product is formed at one time, all components are combined and welded in advance, the form is difficult to change, and subsequent maintenance is very difficult. However, due to the large number of equipment in the nuclear industrial plant and the complex and changeable working conditions, the types of air blowing instruments used in various types of equipment in the nuclear industrial plant are different. Different types of devices need to be selected for different working conditions and equipment, resulting in poor versatility and reusability of integrated equipment. If each type is customized separately, it will be time-consuming and labor-intensive, and the large number of types is not conducive to overall supply. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an integrated blowing instrument for the above-mentioned deficiencies in the prior art, which not only does not introduce human error, but also has good versatility and reusability, can be applied to various complex and changeable working conditions, and is easy to repair and maintain. The present invention also provides a radioactive liquid detection system.

[0006] The present invention provides an integrated air blowing instrument, comprising a box body, a differential pressure transmitter assembly, an air blowing assembly and an air flow connecting assembly, wherein a plurality of mounting positions are arranged in the box body, and the differential pressure transmitter assembly, the air blowing assembly and the air flow connecting assembly are respectively detachably mounted in each mounting position, and the mounting position of the air flow connecting assembly is adjacent to the mounting positions of other components, a pipeline is arranged inside the air flow connecting assembly, and air vents are arranged on the surface, and the differential pressure transmitter assembly and the air blowing assembly are both detachably connected to the air vents, thereby realizing air flow through the pipeline inside the air flow connecting assembly.

[0007] Preferably, the box body has a rectangular area, which is divided into a first area and a second area along the length direction, wherein the first area serves as the installation position of the differential pressure transmitter assembly, multiple differential pressure transmitter assemblies are parallel to each other and distributed in the first area along the width direction of the box, and the pressure pipe openings are all facing the second area, and the verification ports are all facing the wall of the box, and the second area serves as the installation position of the blowing assembly and the airflow connecting assembly, and the blowing assembly and the airflow connecting assembly are arranged in parallel in their respective sheet-like installation positions along the thickness direction of the box, wherein the airflow connecting assembly is a plate-like structure, and its installation position is located at the joint with the rear side wall of the second area, and the installation position of the blowing assembly is arranged between the plate surface of the airflow connecting assembly and the front side wall of the second area, and the airflow connecting assembly is connected to the blowing assembly through the air vents arranged on the plate surface, and is connected to the pressure pipe opening of the differential pressure transmitter assembly through the air vents arranged on the side adjacent to the first area.

[0008] Preferably, the air flow connecting component includes a back plate and a first air circuit plate, the air blowing component includes a flow meter and a pressure reducing valve, a plurality of flow meters are provided, the plurality of flow meters and pressure reducing valves are parallel to each other and distributed along the width direction of the box body, the rear plate surface of the back plate is fittedly mounted on the rear side wall of the second area, the pressure reducing valve is installed on one side of the front plate surface, and the first air circuit plate and the flow meter are installed on the other side, the first air circuit plate is located at the bottom of the front plate surface of the back plate, the top end of the flow meter is installed on the top of the front plate surface of the back plate, and the bottom end is installed on the first air circuit plate, the first air circuit plate is padded between the flow meter and the back plate to form a gap therebetween, and the staggered distribution of the flow meter and the pressure reducing valve in the thickness direction of the box body is realized, the outlet pipeline on one side of the pressure reducing valve is accommodated in the gap between the flow meter and the back plate, and the inlet on the other side faces the wall of the box body.

[0009] Preferably, the vent hole arranged on the top side surface of the first air circuit plate is connected to the outlet pipeline of the pressure reducing valve, the vent hole arranged on the plate surface is connected to the flow meter inlet, the vent hole arranged on the front plate surface of the back plate is connected to the flow meter outlet, and the vent hole arranged on the top side surface is connected to the differential pressure transmitter assembly. The airflow entering the pressure reducing valve passes through the first air circuit plate, the flow meter, and the back plate in sequence and then reaches the differential pressure transmitter assembly.

[0010] Preferably, the blowing assembly also includes a constant flow valve, which is connected to the top of the flow meter. A group of constant flow valves and the flow meter are arranged together in the same installation position. The gas passing through the flow meter also enters the back plate after passing through the constant flow valve.

[0011] Preferably, among the pipelines opened inside the back plate, the pipeline connected to the flow meter outlet through the vent hole is a branch pipeline, one branch of which leads to the differential pressure transmitter assembly, and the other branch leads to the blowing pipeline for conveying to the measured medium.

[0012] Preferably, the air flow connecting component also includes an air path distribution plate, which is clamped between the rear plate surface of the back plate and the rear side wall of the second area to increase the distance between the air vent set on the top side of the back plate and the rear side wall of the second area, so that the air vent corresponds to the position of the differential pressure transmitter assembly. The air flow passing through the back plate first enters the air path distribution plate through the back plate, passes through the pipeline opened in the air path distribution plate, and then enters the back plate to reach the differential pressure transmitter assembly.

[0013] Preferably, the air flow connecting component also includes a second air circuit plate, the plate surface of the second air circuit plate is perpendicular to the plate surface of the back plate, and is connected to the side of the back plate facing the first area to separate the box into the first area and the second area, and the differential pressure transmitter assembly is connected to the second air circuit plate and connected to the back plate through the air vents provided on the second air circuit plate.

[0014] Preferably, the differential pressure transmitter assembly comprises a differential pressure transmitter and a balancing valve, and the balancing valve is connected between the pressure-inlet pipe port of the differential pressure transmitter and the airflow connecting assembly.

[0015] Preferably, the integrated air blowing instrument also includes a pipeline interface, which is provided with multiple pipeline interfaces, all of which penetrate the box body and are respectively arranged at various installation positions, and are used to enable the differential pressure transmitter assembly, the air blowing assembly and the airflow connecting assembly to be connected to the external equipment for airflow / circuit. The box body is provided with through holes at the corresponding positions of each pipeline interface. The pipeline interface includes a pipeline body and bolts. The pipeline body passes through the through holes provided on the box body, and the inner and outer pipe sections are provided with threads. The bolts are sleeved on the pipeline body, and the pipeline body is detachably fastened to the box body through threads.

[0016] The present invention also provides a radioactive liquid detection system, comprising a passage room, a control room, a shielding room and the above-mentioned integrated air blowing meter, wherein a storage device for the radioactive liquid to be tested is arranged in the shielding room, and the integrated air blowing meter is arranged in the passage room, connected to the storage device in the shielding room through an air blowing pipeline, and is used to measure the liquid level and / or interface parameters in the storage device, and the differential pressure transmitter component of the integrated air blowing meter is electrically connected to the control device in the control room, and is used to send the liquid level and / or interface parameters to the control device.

[0017] The present invention provides an integrated air blowing instrument. Compared with the integrated air blowing instruments on the market, it is not an integrated device obtained by directly combining and welding, but a plurality of installation positions are arranged inside a box body, and the components of a differential pressure transmitter assembly, an air blowing assembly and an airflow connecting assembly are respectively detachably connected in each installation position. Therefore, in the face of various working conditions, especially the complex and changeable working conditions in a nuclear industrial plant, the required working conditions can be adapted by disassembling and replacing suitable model components. One integrated instrument can complete the detection of various situations, and there is no need to customize multiple instruments for each working condition separately. The versatility and reusability are good.

[0018] In addition, the present invention uses an airflow connection component to replace the complicated airflow circulation pipelines inside the instrument, and opens a pipeline inside the airflow connection component for gas flow, leaving only vents on the outside. Therefore, when each component is disassembled, repaired or replaced, it only needs to be disassembled and installed with the vents, and there is no need for designers to design the pipelines and connection structures, thus avoiding human errors. Therefore, this integrated air blowing instrument combines the advantages of high integration, good integrity, and effective avoidance of human errors of previous integrated equipment and the advantages of easy replacement and disassembly and good applicability of non-integrated equipment, while completely avoiding the defects of both. At the same time, it also simplifies the airflow pipeline structure, and can quickly and conveniently complete the disassembly and replacement of components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the external structure of the integrated air blowing instrument in Example 1 of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure of the integrated air blowing instrument in Example 1 of the present invention;

[0021] Figure 3 It is a schematic diagram of the disassembled structure of the integrated air blowing instrument in Example 1 of the present invention;

[0022] Figure 4 It is a schematic diagram of the gas flow in the integrated air blowing instrument in Example 1 of the present invention.

[0023] In the figure: 1. Box body; 11. Observation window; 2. Differential pressure transmitter assembly; 21. Differential pressure transmitter; 22. Balancing valve; 3. Air blowing assembly; 31. Flow meter; 32. Pressure reducing valve; 33. Constant flow valve; 4. Air flow connecting assembly; 41. Back plate; 42. First air circuit board; 43. Air circuit distribution plate; 44. Second air circuit board; 5. Pipeline interface; 51. Pipeline body; 52. Bolts. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience and simplification of the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0026] In the description of the present invention, the terms “first”, “second” and “third” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connect", "set", "install", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0028] Example 1

[0029] like Figure 1 and Figure 2 As shown, the integrated air blowing instrument of this embodiment includes a housing 1, a differential pressure transmitter assembly 2, an air blowing assembly 3 and an air flow connecting assembly 4. A plurality of mounting positions are provided in the housing 1. The differential pressure transmitter assembly 2, the air blowing assembly 3 and the air flow connecting assembly 4 can be detachably installed in each mounting position, and the mounting position of the air flow connecting assembly 4 is adjacent to the mounting positions of other components. A pipeline is opened inside the air flow connecting assembly 4, and a vent is provided on the surface. The differential pressure transmitter assembly 2 and the air blowing assembly 3 can be detachably connected to the vent, so as to realize air flow through the pipeline inside the air flow connecting assembly 4.

[0030] Specifically, the external gas source provides gas for the blowing assembly 3, and after the pressure of the gas blown in is adjusted by the pressure reducing valve 32 in the blowing assembly 3, and the flow meter 31 measures the flow of the control gas, it is divided into two paths, respectively entering the differential pressure transmitter assembly 2 and the blowing pipeline connected to the measured medium, and the differential pressure transmitter assembly 2 is used to measure the differential pressure of the blowing pipeline, and can measure the differential pressure between different pipelines by connecting with different blowing pipelines. The pressure reducing valve 32 is a filter pressure reducing valve, and the pressure reducing valve 32 and the flow meter 31, the flow meter 31 and the blowing pipeline, and the flow meter 31 and the differential pressure transmitter assembly 2 are all connected through the pipeline inside the airflow connecting assembly 4 to achieve airflow.

[0031] Compared with the integrated air blowing instruments on the market, this integrated air blowing instrument is not an integrated device obtained by direct assembly and welding, but a plurality of installation positions are arranged inside the box body, and the differential pressure transmitter assembly 2, the air blowing assembly 3 and the airflow connecting assembly 4 are respectively detachably connected in each installation position. Therefore, in the face of various working conditions, especially the complex and changeable working conditions in nuclear industrial plants, the required working conditions can be adapted by disassembling and replacing the applicable model components. One integrated instrument can complete the detection of various situations, and there is no need to customize multiple instruments for each working condition. It has good versatility and reusability.

[0032] In addition, the airflow connection component 4 is used to replace the complicated airflow circulation pipelines inside the instrument. The airflow connection component 4 is opened with pipelines for gas flow, and only vents are left on the outside. Therefore, when each component is disassembled, repaired or replaced, it only needs to be disassembled and installed with the vents, and there is no need for designers to design the pipelines and connection structures to avoid human errors. Therefore, this integrated air blowing instrument not only has the advantages of high integration, good integrity, and effective avoidance of human errors of the previous integrated equipment, but also the advantages of easy replacement and disassembly and good applicability of non-integrated equipment, and completely avoids the defects of the two. At the same time, it also simplifies the airflow pipeline structure, and can quickly and conveniently complete the disassembly and replacement of components. The connection between each component and the vent of the airflow connection component 4 is achieved by bolts, threads, etc., and the sealing is achieved by spiral structures and sealing gaskets to ensure the sealing of the connection of each component.

[0033] In this embodiment, Figure 2 and Figure 3 As shown, the box body 1 has a rectangular area, which is divided into a first area and a second area along the length direction, wherein the first area is used as the installation position of the differential pressure transmitter assembly 2, multiple differential pressure transmitter assemblies 2 are parallel to each other and are all arranged along the length direction of the box body 1, and multiple differential pressure transmitter assemblies 2 are distributed in the first area along the width direction of the box body 1, the pressure pipe openings are all facing the second area, and the calibration ports are all facing the wall of the box body 1.

[0034] The differential pressure transmitter assembly 2 is the end point of part of the gas flow, and it is relatively large in size and thick in thickness, so it is placed alone in the first area. Compared with the interlaced arrangement with other installation positions, it can avoid the return of the gas flow direction, which is conducive to simplifying the internal pipeline structure of the airflow connection assembly 4. In this layout of the present embodiment, not only are the installation positions of each differential pressure transmitter assembly 2 arranged regularly, but each installation position can be used to connect the pressure-inducing pipe port for connecting the airflow with the airflow connection assembly 4 in the second area, which can just make the verification port face the outside of the box 1, and facilitate the setting of the verification pipeline interface 5 on the box wall, so that the external equipment can verify the assembly.

[0035] The second area serves as the installation position for the blowing component 3 and the airflow connecting component 4. The blowing component 3 and the airflow connecting component 4 are arranged in parallel in their respective sheet-like installation positions along the thickness direction of the box body 1. The airflow connecting component 4 is a plate-like structure, and its installation position is located at the joint with the rear side wall of the second area. The installation position of the blowing component 3 is arranged between the plate surface of the airflow connecting component 4 and the front side wall of the second area. The airflow connecting component 4 is connected to the blowing component 3 through the vents provided on the plate surface, and is connected to the pressure pipe port of the differential pressure transmitter component 2 through the vents provided on the side adjacent to the first area.

[0036] The airflow connection component 4 is configured as a plate-like structure, which is not only convenient for placement and does not occupy a separate block area, but also its surface coverage is effectively expanded, and can span the entire box body 1, not only being adjacent to multiple installation positions in the second area at the same time, but also being adjacent to the first area, so as to facilitate detachable connection with other components to achieve air path connection between the components.

[0037] The air blowing component 3 usually includes a pressure reducing valve 32 and multiple flow meters 31. The pressure reducing valve 32 and the flow meter 31 are both columnar structures with a thickness less than that of the differential pressure transmitter component 2. Therefore, when the air flow connecting component 4 is set as a plate structure, it can be set on one side of each pressure reducing valve 32 and flow meter 31, thereby filling the thickness difference between the air blowing component 3 and the differential pressure transmitter component 2, eliminating the vacant area, and making full use of the space in the box 1 in the thickness direction.

[0038] In this embodiment, the air flow connecting component 4 includes a back plate 41 and a first air circuit plate 42, and the blowing component 3 includes a flow meter 31 and a pressure reducing valve 32. A plurality of flow meters 31 are provided, and the plurality of flow meters 31 and the pressure reducing valve 32 are parallel to each other and axially arranged along the length direction of the box body 1. The pressure reducing valve 32 and the plurality of flow meters 31 are distributed along the width direction of the box body 1, wherein the thickness of the flow meter 31 is slightly smaller than the thickness of the pressure reducing valve 32, and the pressure reducing valve 32 is not a regular columnar structure, and an outlet pipeline is also provided on its side.

[0039] Based on this, the present embodiment further designs the internal layout structure of the box body 1, the rear plate surface of the back plate 41 is fitted and installed on the rear side wall of the second area, the pressure reducing valve 32 is installed on one side of the front plate surface, and the first air circuit plate 42 and the flow meter 31 are installed on the other side, the first air circuit plate 42 is located at the bottom of the front plate surface of the back plate 41, the top of the flow meter 31 is installed on the top of the front plate surface of the back plate 41, and the bottom is installed on the first air circuit plate 42, the first air circuit plate 42 is padded between the flow meter 31 and the back plate 41 to form a gap therebetween, and the flow meter 31 and the pressure reducing valve 32 are staggered in the thickness direction of the box body 1, the outlet pipeline on one side of the pressure reducing valve 32 is accommodated in the gap between the flow meter 31 and the back plate 41, and the inlet on the other side faces the wall of the box body 1.

[0040] In this structural layout, the first air path plate 42 fills the thickness difference between the flow meter 31 and the pressure reducing valve 32, fully utilizing the installation space of the installation position of the air blowing assembly 3, and does not completely fill this area, but is only arranged at the bottom of the back plate 41, so that an empty gap is left, so that the flow meter 31 and the pressure reducing valve 32 are staggered, so that the outlet pipeline for air flow output in the pressure reducing valve 32 can be accommodated in the gap, not only making the interconnected outlet pipeline and the flow meter 31 closer, but also making the inlet of the pressure reducing valve 32 face the wall of the box body 1, which is convenient for setting the air intake pipeline interface 5. The structure is compact and the layout is reasonable, while achieving full utilization of space and avoiding lateral expansion of the box body 1.

[0041] In this embodiment, the vents arranged on the top side of the first gas circuit board 42 are connected to the outlet pipeline of the pressure reducing valve 32, and the vents arranged on the plate surface are connected to the inlet of the flow meter 31. The outlet pipeline of the pressure reducing valve 32 is a bent pipe structure, which can be exactly connected to the vents on the top side of the first gas circuit board 42 while being accommodated in the gap between the flow meter 31 and the back plate 41. The first gas circuit board 42 is provided with branch pipelines, and each branch flows to the vents connected to the inlet of each flow meter 31 respectively. The vents arranged on the front plate surface of the back plate 41 are connected to the outlet of the flow meter 31. The bottom end of the flow meter 31 is the inlet, and the top end is the outlet, which can exactly correspond to the connection position of the first gas circuit board 42 and the back plate 41. The first area is located above the second area, and the vents arranged on the top side of the back plate 41 are connected to the differential pressure transmitter assembly 2. The airflow entering the pressure reducing valve 32 passes through the first gas circuit board 42 in sequence, enters each flow meter 31 after diversion, and reaches the differential pressure transmitter assembly 2 after the back plate 41.

[0042] As can be seen from the above, the airflow connecting component 4 sets the gas circulation pipeline inside the plate-like structure, which not only regularizes the pipeline structure and avoids the complex pipeline structure from being exposed to the outside, but also provides an installation basis for the blowing component 3, so that the installation positions of the components in the component and the air path connection positions can correspond to each other, further simplifying the overall structure and avoiding connection errors during disassembly and maintenance.

[0043] In this embodiment, the blowing assembly 3 further includes a constant flow valve 33, which is used to stabilize the gas pressure in the blowing pipeline. The constant flow valve 33 is connected to the top of the flow meter 31. A group of constant flow valves 33 and the flow meter 31 are arranged together in the same installation position. The top of the flow meter 31 is installed on the top of the front plate surface of the back plate 41 through the constant flow valve 33. The gas passing through the flow meter 31 also enters the back plate 41 after passing through the constant flow valve 33. The constant flow valve 33 and the first gas circuit board 42 together cushion the top and bottom of the flow meter 31, so that the flow meter 31 and the back plate 41 are close to parallel in structure, avoiding the unstable connection caused by the inclined placement, and also conforming to the flow direction of the gas circuit.

[0044] In this embodiment, among the pipelines opened inside the back plate 41, the pipeline connected to the outlet of the flow meter 31 (i.e., to the constant flow valve 33) through the vent hole is a branch pipeline, one branch of which leads to the differential pressure transmitter assembly 2, and the other branch leads to the blowing pipeline for conveying the measured medium.

[0045] The airflow needs to be properly distributed before entering the differential pressure transmitter assembly 2. In addition, in order to save space in the box body 1, the back plate 41 needs to be as thin as possible, and the pressure pipe port of the differential pressure transmitter assembly 2 is not close to one side. Therefore, in this embodiment, the airflow connecting assembly 4 also includes an air path distribution plate 43, and the air path distribution plate 43 is clamped between the rear plate surface of the back plate 41 and the rear side wall of the second area to increase the distance between the vent hole set on the top side of the back plate 41 and the rear side wall of the second area, so that the vent hole corresponds to the position of the differential pressure transmitter assembly 2. The airflow passing through the back plate 41 first enters the air path distribution plate 43 through the back plate 41, and then enters the back plate 41 through the pipeline opened in the air path distribution plate 43 to reach the differential pressure transmitter assembly 2. The gas path distribution plate 43 is used to distribute the connection relationship between the pipeline connected to the flow meter and the pressure inlet of the differential pressure transmitter. The pipeline opened inside it can be a pipeline divided into multiple branches from one channel, or it can be other situations that require configuration. The specific structure can be opened according to different distribution situations, and different gas path distribution plates 43 can be selected as needed when installing the instrument.

[0046] In this embodiment, the airflow connection component 4 further includes a second air circuit plate 44, the plate surface of the second air circuit plate 44 is perpendicular to the plate surface of the back plate 41, and is connected to the side of the back plate 41 facing the first area, so as to separate the box body 1 into the first area and the second area, and the differential pressure transmitter component 2 is connected to the second air circuit plate 44, and is connected to the back plate 41 through the vent holes provided on the second air circuit plate 44. The second air circuit plate 44 not only plays the role of dividing the area inside the box body 1, but also provides an installation position for the differential pressure transmitter component 2, which is used for the connection and fixation of the differential pressure transmitter component 2 and the back plate 41. The second air circuit plate 44 corresponds to the position of the pressure pipe port of the differential pressure transmitter component 2, and is grooved to penetrate to the vent holes on the top side of the back plate 41, so as to ensure that the pressure pipe port is connected to the internal pipeline of the back plate 41.

[0047] In this embodiment, the differential pressure transmitter assembly 2 includes a differential pressure transmitter 21 and a balancing valve 22, and the balancing valve 22 is connected between the pressure-introducing pipe port of the differential pressure transmitter 21 and the airflow connecting assembly 4. The balancing valve 22 is used to adjust the air pressure balance.

[0048] In this embodiment, the integrated air blowing instrument also includes a pipeline interface 5, of which a plurality of pipeline interfaces 5 are provided, all of which penetrate the box body 1 and are respectively arranged at various installation positions, and are used to enable the differential pressure transmitter assembly 2, the air blowing assembly 3 and the air flow connecting assembly 4 to be connected to the external equipment for air flow / circuit. Specifically, an air inlet pipeline interface 5 is provided on the left side of the box body, which is used to connect the pressure reducing valve 32 and the external air source, and an air outlet pipeline interface 5 is provided on the bottom side, which is used to connect the back plate 41 and the air blowing pipeline to deliver gas to the measured medium, and an electrical pipeline interface 5 is provided on the right side, which is used to output the signal of the differential pressure transmitter assembly 2, and a calibration pipeline interface 5 is provided on the top side, which is used for external equipment to calibrate the differential pressure transmitter assembly 2.

[0049] The box body 1 is provided with through holes at corresponding positions of each pipeline interface 5. The pipeline interface 5 includes a pipeline body 51 and a bolt 52. The pipeline body 51 passes through the through hole provided on the box body 1, and both the inner and outer pipe sections are provided with threads. The bolt 52 is sleeved on the pipeline body 51, and the pipeline body 51 is detachably fastened to the box body 1 through the threads.

[0050] The box body 1 is provided with a box door, and holes are prefabricated on the box door corresponding to the differential pressure transmitter 21, the flow meter 31 and the pressure reducing valve 32, which serve as observation windows 11 for observing the measurement indications of the internal modules.

[0051] In this embodiment, the box body 1 plays the role of containing, supporting and protecting. Various components are placed inside, and a pipeline interface 5 is set on the side wall. It is about 18 cm thick, about 36 cm high, and 25 to 30 cm wide.

[0052] The back plate 41 is an important module of the air blowing instrument. It is not only the basis for the installation of other components, but also the basis for the prefabrication of pipelines. The width of the back plate 41 is slightly narrower than the inner width of the box 1, and the height is slightly lower than half of the inner height of the box 1. The thickness can meet the needs of the internally excavated pipelines, about 1 cm, and is placed in the lower half of the box 1. The surface of the back plate 41 is pre-drilled with installation holes at corresponding positions for the installation and fastening of other individual components. The internal pipelines are prefabricated to specify the gas running path, and corresponding ventilation holes are reserved on the outside, which has extremely high air tightness. The back plate 41 is fixed to the wall of the box 1 by hexagon socket bolts and installed in the lower half of the inside of the box 1. It serves as the installation basis for other components and can be disassembled and assembled from the box 1 at will.

[0053] The second gas circuit plate 44 is located directly below the differential pressure transmitter assembly 2. The differential pressure transmitter assembly 2 and the second gas circuit plate 44 are fastened by screws. The second gas circuit plate 44 is fixed to the top of the back plate 41 by bolts. The pressure lead pipe port corresponds to the gas circuit passing through the second gas circuit plate 44 and the vent hole on the top of the back plate 41, ensuring that the pressure lead pipe port corresponds to the gas circuit in the back plate 41, and the pressure difference value of the corresponding gas circuit can be measured.

[0054] The pressure reducing valve 32 is fixed to the back plate 41 by bolts, with a height of about 3 / 4 of the height of the back plate 41 and a diameter not exceeding 1 / 4 of the width of the back plate 41. It is placed in the left half in front of the back plate 41, with one side being connected to the air inlet pipe interface 5 of the box body 1 by threads to ensure that the gas enters the pressure reducing valve 32 smoothly, and the other side being bolted to the outlet pipe of the pressure reducing valve 32.

[0055] The flow meter 31 is installed on the right side of the pressure reducing valve 32. Generally, a rotor flow meter or a float flow meter is selected. The built-in constant flow valve 33 is installed above the flow meter 31, fixed with bolts, and can be removed. The overall height of the flow meter 31 and the constant flow valve 33 is about the same as the back plate 41. The top is directly fixed to the back plate 41 by bolts, and the bottom is fixed to the first gas circuit board 42 by bolts. The width of the first gas circuit board 42 is about 3 / 4 of the width of the back plate, and the height is about 3cm. It is fixed to the lower right side of the back plate 41 by hexagon socket bolts, and can be unscrewed and disassembled. It is connected to the outlet pipeline of the pressure reducing valve 32 by bolts to ensure that the gas flows smoothly from the pressure reducing valve 32 to the first gas circuit board 42. According to the planned gas path, the main gas source is divided into multiple gas sources and flows into the multiple flow meters 31 fixed on the first gas circuit board 42.

[0056] The gas distribution plate 43 is an important module for distributing the differential pressure transmitter assembly 2 to measure the differential pressure of different pipelines. It is fixed to the upper half of the back of the back plate 41 by tightening the hexagon socket bolts. The back plate 41 is relatively thin, and a certain space is left on the back of the back plate 41. The thickness of the gas distribution plate 43 is only about 1 cm. Therefore, the gas distribution plate 43 is placed behind the back plate 41 to save space and have a reasonable layout. The gas distribution plate 43 has a pipeline inside, that is, a prefabricated distribution gas path, which is connected to the surface. The gas inlet and outlet correspond to the corresponding gas inlet and outlet of the back plate 41, ensuring smooth passage of gas, realizing the distribution and connection between the gas path and the differential pressure transmitter pressure inlet, and completing the measurement.

[0057] Generally speaking, multiple differential pressure transmitter assemblies 2 are arranged side by side in the upper area of ​​the box body 1, the back plate 41 is attached to the rear side wall of the lower area of ​​the box body 1, an air path distribution plate 43 is sandwiched in the upper area between the back plate 41 and the rear side wall, a second air path plate 44 is arranged between the back plate 41 and the differential pressure transmitter assembly 2, the pressure reducing valve 32 is arranged on the left side of the front plate surface of the back plate 41, and multiple flow meters 31 are arranged on the right side of the front plate surface of the back plate 41. The pressure reducing valve 32 and the flow meter are arranged in parallel, and a first air path plate 42 is provided at the lower right corner of the front plate surface of the back plate 41, so that the flow meter 31 and the pressure reducing valve 32 are staggered front and back.

[0058] The specific flow path of the gas is as follows: Figure 4 As shown, compressed air enters the instrument box 1 from the middle air inlet pipeline interface 5, first passes through the pressure reducing valve 32 to control the air flow pressure to a suitable working pressure, and then the gas is transported to the flowmeter 31 through the first air circuit board 42 to control the gas to flow out at a certain flow value; then the gas is regulated by the constant flow valve 33 to ensure the stability of the gas flow; the gas regulated by the constant flow valve 33 flows into the back plate 41, and a part of it enters the air circuit distribution plate 43 after diversion. After the air circuit distribution plate 43 distributes the air circuit, it is connected to the differential pressure transmitter assembly 2 through the back plate 41 and the second air circuit board 44. The differential pressure transmitter 21 can measure the differential pressure value between different pipelines, and the air pressure balance can be adjusted by the balancing valve 22, and the signal is transmitted through the electrical pipeline interface 5; the other part of the gas is transported to the air outlet pipeline interface 5 through the pipeline inside the back plate 41, and is connected to the blowing pipeline to transport the gas to the measured medium.

[0059] This embodiment modularizes the components of the integrated air blowing instrument, and divides them into multiple modules such as the box body 1, the pipeline interface 5, the differential pressure transmitter 21, the balancing valve 22, the second gas circuit board 44, the pressure reducing valve 32, the flow meter 31, the constant flow valve 33, the first gas circuit board 42, the back plate 41, and the gas circuit distribution plate 43. There are no more messy gas source pipes inside the box body 1. Each module has its own suitable installation position, and the internal composition is more concise and clear. Each module is an independent detachable unit, which is installed and fixed separately. The connection method can be selected by bolts, threads and sealing gaskets to ensure that each module can be disassembled and assembled separately and the air tightness of the instrument is guaranteed. It can be disassembled and installed separately, and assembled freely, and can be matched with more combination types, reducing the process of customizing a single device separately.

[0060] The installation positions of each module are planned in advance in the air blowing instrument box, and the corresponding modules are installed in the corresponding places. The overall characteristics of the air blowing instrument, such as high measurement stability, measurement needs and multiple application occasions, are combined. By combining the analysis of the integrated structure and the combination of the air blowing instrument, starting from the overall composition of the air blowing instrument, its various components are modularized, which can be assembled, spliced ​​and replaced separately, further improving the versatility and reusability of the air blowing instrument. The layout of each module is planned according to the measurement principle and the direction of the gas, which saves space to the greatest extent, compresses the size of the box 1, saves costs, meets the measurement needs of the nuclear industry plant, and can also be applied to other occasions where air blowing instruments are used.

[0061] Example 2

[0062] The radioactive liquid detection system of this embodiment includes a passage room, a control room, a shielding room and the integrated air blowing meter in Example 1. The storage equipment of the radioactive liquid to be tested is arranged in the shielding room, and the integrated air blowing meter is arranged in the passage room. The passage room is a room through which people can pass. The integrated air blowing meter is connected to the storage equipment located in the shielding room through an air blowing pipeline, and is used to measure the liquid level and / or interface parameters in the storage equipment. The differential pressure transmitter component 2 of the integrated air blowing meter is electrically connected to the control equipment in the control room, and is used to send the liquid level and / or interface parameters to the control equipment, so as to realize subsequent calculation and display in the control room.

[0063] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An integrated air blowing instrument, characterized in that: The invention comprises a housing (1), a differential pressure transmitter assembly (2), an air blowing assembly (3) and an air flow connection assembly (4), The box body (1) is provided with a plurality of installation positions, and the differential pressure transmitter component (2), the air blowing component (3) and the air flow connection component (4) are respectively detachably installed in each installation position, and the installation position of the air flow connection component (4) is adjacent to the installation positions of the other components. The airflow connection component (4) has a pipeline inside and a vent hole on its surface. The differential pressure transmitter assembly (2) and the air blowing assembly (3) can both be detachably connected to the vent holes, thereby achieving air flow through the pipeline inside the air flow communication assembly (4); The box (1) has a rectangular area inside, which is divided into a first area and a second area along the length direction. The first area serves as the installation position for the differential pressure transmitter assembly (2), a plurality of differential pressure transmitter assemblies (2) are parallel to each other and distributed in the first area along the width direction of the box body (1), and the pressure lead pipe openings are all oriented toward the second area, and the calibration ports are all oriented toward the wall surface of the box body (1). The second area serves as a mounting position for the air blowing component (3) and the air flow connecting component (4), and the air blowing component (3) and the air flow connecting component (4) are arranged in parallel in their respective sheet-shaped mounting positions along the thickness direction of the box body (1). The airflow connection component (4) is a plate-shaped structure, and its installation position is located at a position where it fits the rear side wall of the second area. The installation position of the blowing component (3) is arranged between the plate surface of the airflow connecting component (4) and the front side wall of the second area. The air flow connection component (4) is connected to the air blowing component (3) through the air vent provided on the plate surface, and is connected to the pressure inlet of the differential pressure transmitter component (2) through the air vent provided on the side surface adjacent to the first area; The airflow communication component (4) comprises a back plate (41) and a first air path plate (42). The air blowing assembly (3) comprises a flow meter (31) and a pressure reducing valve (32). A plurality of flow meters (31) are provided. The plurality of flow meters (31) and pressure reducing valves (32) are parallel to each other and distributed along the width direction of the box body (1). The rear plate surface of the back plate (41) is mounted on the rear side wall of the second area, a pressure reducing valve (32) is mounted on one side of the front plate surface, and a first gas path plate (42) and a flow meter (31) are mounted on the other side. The first gas path plate (42) is located at the bottom of the front plate surface of the back plate (41). The top end of the flow meter (31) is mounted on the top of the front plate surface of the back plate (41), and the bottom end is mounted on the first gas path plate (42). The first gas path plate (42) is cushioned between the flow meter (31) and the back plate (41) to form a gap between the two, and to achieve staggered distribution of the flow meter (31) and the pressure reducing valve (32) in the thickness direction of the box body (1). The outlet pipeline on one side of the pressure reducing valve (32) is accommodated in the gap between the flow meter (31) and the back plate (41), and the inlet on the other side faces the wall of the box body (1).

2. The integrated air blowing instrument according to claim 1, characterized in that: The vent hole provided on the top side of the first gas circuit plate (42) is connected to the outlet pipeline of the pressure reducing valve (32), and the vent hole provided on the plate surface is connected to the inlet of the flow meter (31). The vent hole provided on the front plate surface of the back plate (41) is connected to the outlet of the flow meter (31), and the vent hole provided on the top side surface is connected to the differential pressure transmitter assembly (2). The airflow entering the pressure reducing valve (32) passes through the first air path plate (42), the flow meter (31), and the back plate (41) in sequence before reaching the differential pressure transmitter assembly (2).

3. The integrated air blowing instrument according to claim 1, characterized in that: The blowing assembly (3) further comprises a constant flow valve (33), The constant flow valve (33) is connected to the top of the flow meter (31), and a set of constant flow valves (33) and the flow meter (31) are arranged together in the same installation position. The gas passing through the flow meter (31) also passes through a constant flow valve (33) and then enters the back plate (41).

4. The integrated air blowing instrument according to claim 2, characterized in that: Among the pipelines opened inside the back plate (41), the pipeline connected to the outlet of the flow meter (31) through the vent hole is a branch pipeline. One branch leads to the differential pressure transmitter assembly (2), and the other branch leads to the air blowing pipeline that is transported to the measured medium.

5. The integrated air blowing instrument according to claim 2, characterized in that: The airflow communication component (4) further comprises an air path distribution plate (43), The gas path distribution plate (43) is sandwiched between the rear plate surface of the back plate (41) and the rear side wall of the second area to increase the distance between the vent hole provided on the top side of the back plate (41) and the rear side wall of the second area, so that the vent hole corresponds to the position of the differential pressure transmitter assembly (2). The airflow passing through the back plate (41) first enters the air distribution plate (43) through the back plate (41), passes through the pipeline opened in the air distribution plate (43), then enters the back plate (41) and reaches the differential pressure transmitter assembly (2).

6. The integrated air blowing instrument according to claim 1, characterized in that: The airflow communication component (4) further comprises a second air path plate (44), The plate surface of the second gas path plate (44) is perpendicular to the plate surface of the back plate (41), and is connected to the side surface of the back plate (41) facing the first area, so as to separate the box body (1) into the first area and the second area. The differential pressure transmitter assembly (2) is connected to the second gas circuit plate (44) and communicates with the back plate (41) via a vent hole provided on the second gas circuit plate (44).

7. The integrated air blowing instrument according to claim 1, characterized in that: The differential pressure transmitter assembly (2) comprises a differential pressure transmitter (21) and a balancing valve (22). The balancing valve (22) is connected between the pressure-inducing pipe port of the differential pressure transmitter (21) and the airflow connecting component (4).

8. The integrated air blowing instrument according to any one of claims 1 to 7, characterized in that: It also includes a pipeline interface (5), wherein a plurality of pipeline interfaces (5) are provided, all of which penetrate the box body (1) and are respectively arranged at various installation positions, and are used to enable the differential pressure transmitter assembly (2), the air blowing assembly (3) and the air flow connection assembly (4) to be connected to external equipment in terms of air flow / circuit. The box body (1) is provided with through holes at positions corresponding to the pipe interfaces (5). The pipeline interface (5) comprises a pipeline body (51) and a bolt (52); the pipeline body (51) passes through a through hole provided on the box body (1), and both inner and outer pipe sections are provided with threads; the bolt (52) is sleeved on the pipeline body (51), and the pipeline body (51) is detachably fastened to the box body (1) via the threads.

9. A radioactive liquid detection system, characterized in that: It comprises a passage room, a control room, a shielding room and an integrated air blowing instrument as claimed in any one of claims 1 to 8, The storage equipment of the radioactive liquid to be tested is arranged in the shielding room. The integrated air blowing instrument is arranged in the passage room and is connected to the storage device in the shielding room through the air blowing pipeline, and is used to measure the liquid level and / or interface parameters in the storage device. The differential pressure transmitter assembly (2) of the integrated air blowing instrument is electrically connected to the control device in the control room, and is used to send the liquid level and / or interface parameters to the control device.

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