Automatic temperature control sampling device capable of prolonging system calibration response time

Abstract

The utility model discloses an automatic temperature control sampling device capable of prolonging system calibration response time. The automatic temperature control sampling device comprises a sampling unit and a temperature control unit, according to the utility model, the pneumatic angle seat valve is introduced at the outlet of the sampling pipe, which is a core component of the sampling unit, and the valve is tightly matched with the sealing ring by driving the telescopic hammer through the cylinder, so that the efficient and reliable cut-off operation of a sampling pipe gas circuit is realized; in the system calibration process, the standard gas is effectively limited to circulate in the device, the problems that the concentration of the standard gas is reduced and the calibration time is prolonged due to gas leakage in a traditional design are solved, and therefore the accuracy and high efficiency of the calibration process are ensured. According to the design of the temperature control unit, the heater is directly arranged outside the cavity in a sleeving mode, and accurate temperature control is achieved through the temperature controller and the solid-state relay. According to the integrated design, the complex installation process that a temperature control box needs to be externally hung or cable leads need to be additionally arranged in a traditional probe is simplified, and the manufacturing cost and the maintenance difficulty are greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sampling device technical field especially, it relates to a kind of self-control temperature sampling device of improving system calibration response time. BACKGROUND

[0002] As the core link of environmental monitoring field, the precision and reliability of flue gas emission are directly related to the quality of air quality and the health status of ecological environment. In order to actively respond to the requirements of environmental regulations, the continuous emission monitoring system (CEMS system) has become an indispensable monitoring tool in various industrial production processes, which can realize real-time, dynamic monitoring of flue gas emission.

[0003] According to the strict provisions of "HJ76-2017 Continuous Emission Monitoring System for Flue Gas (Sulfur Dioxide, Nitrogen Oxides, Particulate Matter) of Stationary Sources", the relevant departments of the state set a clear threshold limit for the response time of CEMS system. In the standard process of testing system response time, standard gas needs to start from the monitoring station house, go through a complex path, and finally reach the end of the sampling probe, and pass through the probe filter, return to the online monitoring system along the established channel of sample gas. Only when the value of the analyzer reaches 90% of the nominal value of the standard gas, the test can be terminated, and the time required for this process must be strictly controlled within 200 seconds.

[0004] However, in actual operation, due to the differences in structural design of various probe manufacturers, the system response time is generally longer, even exceeding the specified threshold.

[0005] By analyzing the structure of the current sampling probe (such as the one shown in the attached Figure 5 As shown), we can easily find that it has many drawbacks. First of all, the probe tail end lacks necessary cutoff measures, resulting in a large amount of standard gas leakage into the flue during the intake process, which not only causes serious waste of standard gas, but also significantly reduces the content of standard gas reaching the monitoring system, thereby prolonging the system response time. Secondly, the distance between the standard gas inlet and the sample gas outlet is too close, so that the standard gas does not fully pass through the filter of the filter core and directly flows out from the sample gas outlet, which seriously violates the requirements of environmental standards and reduces the accuracy of monitoring data. Finally, the heating block inside the probe lacks self-temperature control function, and usually needs to be hung outside the probe box for temperature control operation, or the lead of the heater is connected to the system cabinet through cable, which not only increases the complexity and cost of installation, but also poses a potential threat to the stability and reliability of the system, which needs to be improved. INVENTION CONTENTS

[0006] The purpose of this part is to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part and the abstract of the specification and the title of the application in order to avoid obscuring the purpose of this part, the abstract of the specification and the title of the application, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0007] Therefore, in order to solve the above technical problems, the utility model provides the following technical scheme: a self-temperature control sampling device for improving system calibration response time, comprising a sampling unit and a temperature control unit;

[0008] The sampling unit comprises a sampling pipe, an inlet pipe connected to the outlet of the sampling pipe, and a pneumatic angle seat valve arranged on the inlet pipe for sealing; the inlet pipe is connected to a cavity, the cavity is internally provided with a filter element, one end of the cavity close to the sampling pipe is connected to a one-way joint, the other end of the cavity is provided with a sealing cover, an exhaust passage is formed in the sealing cover, the inlet of the exhaust passage is in communication with the outlet of the filter element, the exhaust passage is connected to an exhaust port, the exhaust port is connected to a heat tracing pipe, and the heat tracing pipe is used for communication with an analysis device for system calibration;

[0009] The temperature control unit comprises a heater, the heater is sleeved outside the cavity, the heater is electrically connected to a solid-state relay, the input end of the solid-state relay is connected to a temperature controller through a control signal, and the heater controls the temperature of the device accurately through the temperature controller and the solid-state relay.

[0010] As a preferred scheme of the self-temperature control sampling device for improving system calibration response time, the pneumatic angle seat valve comprises a valve body, a cylinder and a telescopic hammer, the valve body is obliquely installed at the top end of the inlet pipe, the bottom end of the valve body is in communication with the inlet pipe, the cylinder is internally provided in the valve body, and the output end of the cylinder is connected to the telescopic hammer.

[0011] As a preferred scheme of the self-temperature control sampling device for improving system calibration response time, a sealing ring matched with the telescopic hammer is arranged at the position corresponding to the telescopic hammer on the inlet pipe, so that when the cylinder drives the telescopic hammer to fall to a certain height, the telescopic hammer is sealingly connected to the opening of the sealing ring, thereby achieving the cutting-off operation of the sampling pipe and preventing the massive leakage of standard gas during system calibration.

[0012] As a preferred scheme of the self-temperature control sampling device for improving system calibration response time, the one-way joint is in communication with the bottom of the cavity, the one-way joint is used for communication with a calibration gas source for system calibration, and the standard gas is introduced into the cavity through the one-way joint.

[0013] As an optimal solution for the self-control temperature sampling device for improving the system calibration response time described in the utility model, the heating tube is sleeved with a clamp, the clamp is connected to a mounting seat, a sampling support is vertically arranged on the mounting seat close to one end of the sampling tube, and a mounting hole is opened on the sampling support for use with the sampling tube. The sampling tube passes through the sampling hole and is fixed on the sampling support. The design of the mounting structure such as the clamp and the mounting seat makes the entire device compact and easy to install and maintain.

[0014] As an optimal solution for the self-control temperature sampling device for improving the system calibration response time described in the present invention, the main body support is vertically connected to the mounting base, the top of the main body support is provided with an arc-shaped groove, and is nested on the outside of the heater through the arc-shaped groove, and the left and right sides of the main body support are fixed to the heater by fasteners.

[0015] Beneficial effects of the utility model:

[0016] 1. This utility model introduces a pneumatic angle seat valve at the outlet of the sampling tube, the core component of the sampling unit. This valve works closely with the sealing ring by driving the telescopic hammer through a cylinder, achieving efficient and reliable shutoff operation of the gas path of the sampling tube. During the system calibration process, the standard gas is effectively confined to circulate inside the device, avoiding the problems of reduced standard gas concentration and extended calibration time caused by gas leakage in traditional designs, thereby ensuring the accuracy and efficiency of the calibration process.

[0017] 2. This utility model optimizes the position of the standard gas inlet to improve calibration accuracy. Specifically, by placing the standard gas inlet at the rear of the sampling probe and configuring it with a filter element and a one-way connector, this device ensures that the standard gas can fully flow through the filter element, effectively removing impurities and improving gas purity. This design not only meets the high gas quality requirements of environmental standards, but also ensures a more even distribution of the standard gas within the probe, further shortening system response time and improving the accuracy and stability of calibration results.

[0018] 3. The temperature control unit design of this utility model places the heater directly on the outside of the chamber, achieving precise temperature control through a temperature controller and solid-state relay. This integrated design not only simplifies the complex installation process of traditional probes, which require an external temperature control cabinet or additional cables, but also significantly reduces manufacturing costs and maintenance. Furthermore, the uninterrupted operation of the heater (continuous power supply is sufficient) ensures temperature stability of the standard gas during transmission, further improving the accuracy and reliability of calibration.

[0019] 4、The integrated design and efficient gas path management of the utility model not only reduce material consumption and installation time, but also reduce the repeated calibration cost caused by calibration failure or inaccurate data through improving calibration efficiency and accuracy. In addition, the intelligent management of the temperature control module reduces manual intervention and reduces operation and maintenance cost, which brings significant economic benefits to enterprises. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0021] Figure 1 It is the overall structure schematic diagram of the utility model.

[0022] Figure 2 It is the sectional structure schematic diagram of the utility model.

[0023] Figure 3 It is the partial enlarged structure schematic diagram of the utility model. Figure 2

[0024] Figure 4 It is the partial specific structure schematic diagram of the sampling unit of the utility model.

[0025] Figure 5 It is the structure schematic diagram of prior art of the utility model.

[0026] In the drawing: 100, sampling unit;101, sampling pipe;102, air inlet pipe;1021, sealing ring;103, pneumatic angle seat valve;1031, valve body;1032, air cylinder;1033, telescopic hammer;104, cavity;105, filter element;106, one-way joint;107, sealing cover;108, exhaust passage;109, exhaust port;110, heat tracing pipe;111, clamp;112, mounting seat;113, sampling support;114, main support;

[0027] 200, temperature control unit;201, heater;202, solid state relay;203, temperature controller. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model will be described in detail below with reference to the drawings of the specification.

[0029] ​In the following description, a lot of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can be practiced in other ways not described herein, and it is understood that one skilled in the art can make similar substitutions without departing from the spirit of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0030] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent of or mutually exclusive of other embodiments.

[0031] Thirdly, the present application is described in detail in conjunction with the schematic diagram, and in the detailed description of the embodiments of the present application, the cross-sectional view of the device structure is partially enlarged without the general proportion for the convenience of description, and the schematic diagram is only an example, which should not limit the scope of protection of the present application herein. In addition, the three-dimensional spatial dimensions including length, width and depth should be included in actual manufacture.

[0032] Referring to Figures 1-4 For the embodiments of the present application, a self-temperature control sampling device for improving system calibration response time is provided, comprising a sampling unit 100 and a temperature control unit 200;

[0033] The sampling unit 100 comprises a sampling pipe 101, and an air inlet pipe 102 is connected to the outlet of the sampling pipe 101, and a pneumatic angle seat valve 103 for sealing is arranged on the air inlet pipe 102; the pneumatic angle seat valve 103 comprises a valve body 1031, a cylinder 1032 and a telescopic hammer 1033, the valve body 1031 is installed obliquely at the top end of the air inlet pipe 102, the bottom end of the valve body 1031 is communicated with the air inlet pipe 102, the cylinder 1032 is built-in in the valve body 1031, and the output end of the cylinder 1032 is connected with the telescopic hammer 1033; the air inlet pipe 102 is arranged with a sealing ring 1021 used in cooperation with the telescopic hammer 1033 at the position corresponding to the telescopic hammer 1033, so that when the cylinder 1032 drives the telescopic hammer 1033 to fall to a certain height, the telescopic hammer 1033 is sealingly connected with the opening of the sealing ring 1021, thereby realizing the cut-off operation of the sampling pipe 101, and preventing the standard gas from leaking a lot during system calibration.

[0034] The air inlet pipe 102 is connected with a cavity 104, the cavity 104 is built-in with a filter core 105, the cavity 104 is connected with a one-way joint 106 near one end of the sampling pipe 101, the one-way joint 106 is communicated with the bottom of the cavity 104, the one-way joint 106 is used for being communicated with a calibration gas source for system calibration, and the standard gas is introduced into the cavity 104 through the one-way joint 106; the other end of the cavity 104 is arranged with a sealing cover 107, the sealing cover 107 is provided with an exhaust passage 108, the air inlet of the exhaust passage 108 is communicated with the air outlet of the filter core 105, the exhaust passage 108 is connected with an exhaust interface 109, the exhaust interface 109 is connected with a heat tracing pipe 110, the heat tracing pipe 110 is used for being communicated with an analysis equipment for system calibration; the heat tracing pipe 110 is sleeved with a clamp 111, the clamp 111 is connected with a mounting seat 112, the mounting seat 112 is vertically arranged with a sampling support 113 near one end of the sampling pipe 101, the sampling support 113 is provided with a mounting hole position used in cooperation with the sampling pipe 101, the sampling pipe 101 penetrates through the sampling hole position and is fixed on the sampling support 113; the mounting seat 112 is vertically connected with a main body support 114, the top end of the main body support 114 is provided with an arc-shaped groove, and the main body support 114 is nested on the outside of the heater 201 through the arc-shaped groove, and the left and right sides of the main body support 114 are fixed on the heater 201 through fasteners.

[0035] The temperature control unit 200 includes a heater 201, the heater 201 is sleeved on the outside of the cavity 104, the heater 201 is electrically connected with a solid-state relay 202, the input end of the solid-state relay 202 is connected with a temperature controller 203 through a control signal, and the heater 201 accurately controls the temperature of the device through the temperature controller 203 and the solid-state relay 202.

[0036] In the embodiment: when the system calibration operation is performed, the standard gas enters the inside of the probe part of the device through the one-way joint 106, at this time, the pneumatic angle seat valve 103 obtains the air supply signal, the air cylinder 1032 drives the retractable hammer 1033 to fall, so that the retractable hammer 1033 is sealingly connected with the opening of the sealing ring 1021, the cutting operation of the sampling pipe 101 is realized, and at this time, the standard gas cannot leak to the outside through the sampling pipe 101.

[0037] When the standard gas fills the entire cavity 104, reaches the sealing cover 107 through the filter core 105, reaches the exhaust interface 109 along the exhaust pipeline 108 inside the sealing cover 107, and is transported into the analysis system in the rear-end monitoring station room through the heat tracing pipe 110, the system calibration response time test is performed.

[0038] In the process, when the standard gas passes through the probe part, the heater 201 is heated uninterruptedly by turning on the power supply of the heater 201, and the heater 201 is precisely controlled in temperature by the temperature controller 203 and the solid-state relay 202 (specifically, in actual use, a temperature sensor connected with the temperature controller can also be preferably built in the device, so that the temperature controller 203 receives the temperature sensor signal, and the temperature controller 203 controls the power state of the heater 203 through the solid-state relay 202, to realize precise control of the temperature in the sampling unit 100), which greatly reduces the maintenance operation and installation cost of the probe.

[0039] It is worth noting that the whole device is controlled by the controller, and since the controller is a commonly used device, it belongs to the existing mature technology, and the electrical connection relationship of each part of the temperature control unit and the specific circuit structure will not be described here.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A self-controlled temperature sampling device for improving system calibration response time, characterized by: It comprises a sampling unit (100) and a temperature control unit (200); The sampling unit (100) comprises a sampling tube (101), an outlet of the sampling tube (101) is connected to an air inlet tube (102), and a pneumatic angle seat valve (103) for sealing is arranged on the air inlet tube (102); the air inlet tube (102) is connected to a cavity (104), a filter element (105) is built in the cavity (104), one end of the cavity (104) close to the sampling tube (101) is connected to a one-way joint (106), and the other end of the cavity (104) is arranged with a sealing cover (107), an exhaust channel (108) is provided on the sealing cover (107), an air inlet of the exhaust channel (108) is communicated with an air outlet of the filter element (105), the exhaust channel (108) is connected to an exhaust interface (109), the exhaust interface (109) is connected to a heating pipe (110), and the heating pipe (110) is used to communicate with an analytical device for system calibration; The temperature control unit (200) comprises a heater (201), which is sleeved on the outside of the cavity (104); the heater (201) is electrically connected to a solid-state relay (202); an input end of the solid-state relay (202) is connected to a temperature controller (203) via a control signal; the heater (201) accurately controls the temperature of the device via the temperature controller (203) and the solid-state relay (202).

2. The self-controlled temperature sampling device for improving system calibration response time according to claim 1, characterized in that: The pneumatic angle seat valve (103) comprises a valve body (1031), a cylinder (1032) and a telescopic hammer (1033). The valve body (1031) is obliquely mounted on the top end of the air inlet pipe (102). The bottom end of the valve body (1031) is connected to the air inlet pipe (102). The valve body (1031) has a built-in cylinder (1032). The output end of the cylinder (1032) is connected to the telescopic hammer (1033).

3. The self-controlled temperature sampling device for improving system calibration response time according to claim 2, characterized in that: A sealing ring (1021) for use with the telescopic hammer (1033) is arranged at a position of the air inlet pipe (102) corresponding to the telescopic hammer (1033), so that when the cylinder (1032) drives the telescopic hammer (1033) to fall to a certain height, the telescopic hammer (1033) is sealed and connected to the opening of the sealing ring (1021), thereby realizing a cut-off operation on the sampling tube (101) and preventing a large amount of standard gas from leaking during system calibration.

4. The self-controlled temperature sampling device for improving system calibration response time according to claim 1, characterized in that: The one-way joint (106) is connected to the bottom of the cavity (104). The one-way joint (106) is used to connect to a calibration gas source for system calibration, and standard gas is introduced into the cavity (104) through the one-way joint (106).

5. The self-controlled temperature sampling device for improving system calibration response time according to claim 1, characterized in that: The heating pipe (110) is sleeved with a clamp (111), the clamp (111) is connected to a mounting seat (112), a sampling support (113) is vertically arranged at one end of the mounting seat (112) close to the sampling tube (101), and a mounting hole for use with the sampling tube (101) is opened on the sampling support (113), and the sampling tube (101) passes through the sampling hole and is fixed on the sampling support (113).

6. The self-controlled temperature sampling device for improving system calibration response time according to claim 5, characterized in that: The mounting seat (112) is vertically connected to a main body support (114), the top of the main body support (114) is provided with an arc-shaped groove, and is nested on the outside of the heater (201) through the arc-shaped groove, and the left and right sides of the main body support (114) are fixed to the heater (201) by fasteners.

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