Single-point water vapor sampling device

Abstract

The invention relates to the technical field of water vapor sampling, and discloses a single-point water vapor sampling device which comprises a sampling frame, the top of the sampling frame is fixedly connected with a sample injection pipe, the inner wall of the sampling frame is fixedly connected with a double-coil cooler, the sample injection pipe is connected with the double-coil cooler, and the outer surface of the sample injection pipe is provided with a high-pressure valve. A communicating pipe is arranged at the bottom of the double-coil cooler, a temperature controller, a pressure gauge, a protective valve and a constant-pressure valve are arranged on the outer surface of the first communicating pipe, one end of the first communicating pipe is connected with the constant-temperature cooler, the constant-pressure valve is located between the pressure gauge and the constant-temperature cooler, and a second communicating pipe is arranged on one side of the constant-temperature cooler. And a throttle valve, a water sample filter and a flow meter are respectively arranged on the outer surface of the second communicating pipe. According to the invention, the qualification of the drainage quality of the heat supply network and the accuracy of online hydrogen conductivity measurement are ensured, so that the leakage condition of the heater of the heat supply network is effectively monitored, and the safe and stable operation of a heat supply network system is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of water vapor sampling, and specifically relates to a single-point water vapor sampling device. Background Art

[0002] The heat network drain water system is an important part of the heat supply system of the heat network primary station. The heat network drain water circulates to the boiler feed water, and its quality affects the safe and stable operation of the unit. Therefore, a drain water sampling point is set on the drain water pipeline of each heat network heater to monitor the water quality of the heat network drain water of each heat network heater and ensure that the quality of the drain water returned to the thermal system is qualified.

[0003] Currently, when sampling water vapor, due to inappropriate selection of the sampling point and low drain water pressure, it is impossible to obtain a water sample, resulting in inaccurate on-line hydrogen conductivity measurement of the heat network drain water, inability to monitor normally, which is not conducive to the leakage monitoring of the heat network heater, and there are great potential safety hazards. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a single-point water vapor sampling device, mainly to solve the problems that when sampling water vapor in the prior art, due to inappropriate selection of the sampling point and low drain water pressure, it is impossible to obtain a water sample, resulting in inaccurate on-line hydrogen conductivity measurement of the heat network drain water, inability to monitor normally, which is not conducive to the leakage monitoring of the heat network heater, and there are great potential safety hazards.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A single-point water vapor sampling device includes a sampling rack. A sampling inlet pipe is fixedly connected to the top of the sampling rack. A double-coil cooler is fixedly connected to the inner wall of the sampling rack. The sampling inlet pipe is connected to the double-coil cooler, and a high-pressure valve is provided on the outer surface of the sampling inlet pipe. A communication pipe is provided at the bottom of the double-coil cooler, and a temperature controller, a pressure gauge, a protection valve and a constant-pressure valve are respectively provided on the outer surface of the first communication pipe. One end of the first communication pipe is connected to a constant-temperature cooler, and the constant-pressure valve is located between the pressure gauge and the constant-temperature cooler. A second communication pipe is provided on one side of the constant-temperature cooler, and a throttle valve, a water sample filter and a flow meter are respectively provided on the outer surface of the second communication pipe. A conductivity meter is provided at one end of the second connecting pipe, and one end of the second connecting pipe is communicated with a low-pressure blowdown pipe.

[0009] Further, a high-pressure blowdown pipe is provided on the inner wall of the sampling rack, and one end of the high-pressure blowdown pipe is connected to one end of the double-coil cooler, and a pressure reducing valve is provided on the outer surface of the high-pressure blowdown pipe.

[0010] On the basis of the foregoing solution, a cooling water outlet pipe and a cooling water inlet pipe are respectively arranged on one side of the double-coil cooler, and ball valves are arranged on the outer surfaces of the cooling water outlet pipe and the cooling water inlet pipe.

[0011] As a further solution of the present invention, a distribution box is fixedly connected to one side of the sampling rack, and an alarm is fixedly connected to the top of the sampling rack.

[0012] Furthermore, a communicating pipe is arranged on one side of the second communicating pipe, and the communicating pipe is located between the pressure gauge and the constant pressure valve.

[0013] On the basis of the foregoing solution, a sampling pipe is arranged on one side of the connecting pipe, and a sampling head is arranged on one side of the sampling pipe. A liquid discharge seat is arranged on the inner wall of the sampling head, and a sample outlet hole is opened at the bottom of the sampling head.

[0014] As a further solution of the present invention, a valve rod is slidably connected to the inner wall of the sampling head, a plug is arranged at the bottom of the valve rod, a spring is sleeved on the outer surface of the valve rod, and the spring is located between the plug and the inner wall of the top of the sampling head. The valve rod passes through the top of the sampling head and is rotatably connected to a pressing rod.

[0015] Furthermore, a sampling pump is arranged on one side of the second communicating pipe.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the present invention provides a single-point water vapor sampling device, which has the following beneficial effects:

[0018] 1. For this single-point water vapor sampling device, by reasonably arranging the sampling rack and the connecting pipeline, the sampling quality of the heat network drain water and the accuracy of monitoring can be effectively improved, ensuring the safe and stable operation of the heat network. From the sampling, cooling, monitoring to the final discharge of the sample water, the entire process has been effectively controlled and managed, ensuring the qualification of the heat network drain water quality and the accuracy of the on-line hydrogen conductivity measurement, thereby effectively monitoring the leakage of the heat network heater and ensuring the safe and stable operation of the heat network system.

[0019] 3. For this single-point water vapor sampling device, by detecting with a conductivity meter, the conductivity signals of the drain water of each heater are led to the auxiliary network DCS, so as to achieve the purpose of on-line detection of the conductivity of the heat network heater drain water, and thus timely discover the leakage defects of the heat network heater.

[0020] 4. For this single-point water vapor sampling device, by arranging a sampling pump and a manual sampling mechanism on one side of the first communicating pipe, the sampling point is properly selected, and manual sampling can also be carried out. It can not only be monitored on-line but also manually detected, which is beneficial to the monitoring effect of the heat network heater and reduces potential safety hazards. Brief description of the drawings

[0021] Figure 1Schematic plan view of Embodiment 1 of a single-point water vapor sampling device proposed by the present invention;

[0022] Figure 2 Schematic front internal structure view of Embodiment 1 of a single-point water vapor sampling device proposed by the present invention;

[0023] Figure 3 Schematic side internal structure view of Embodiment 1 of a single-point water vapor sampling device proposed by the present invention;

[0024] Figure 4 Schematic structure view of the sampling system of Embodiment 1 of a single-point water vapor sampling device proposed by the present invention;

[0025] Figure 5 Schematic structure view of the sampling system of Embodiment 2 of a single-point water vapor sampling device proposed by the present invention;

[0026] Figure 6 Partial sectional structure view of Embodiment 2 of a single-point water vapor sampling device proposed by the present invention.

[0027] In the figure: 1, sampling rack; 2, sampling pipe; 3, high-pressure valve; 4, pressure reducing valve; 5, double-coil cooler; 6, high-pressure drain pipe; 7, ball valve; 8, cooling water outlet pipe; 9, cooling water inlet pipe; 10, temperature controller; 11, pressure gauge; 12, protection valve; 13, constant pressure valve; 14, distribution box; 15, alarm; 16, constant temperature cooler; 17, throttle valve; 18, water sample filter; 19, flowmeter; 20, conductivity meter; 21, low-pressure drain pipe; 22, connecting pipe; 23, sampling tube; 24, sampling head; 25, liquid discharge seat; 26, valve rod; 27, plug; 28, spring; 29, sample outlet hole; 30, pressure bar. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment 1

[0030] Refer to Figures 1 - 4, A single-point water vapor sampling device, including a sampling frame 1. A sampling tube 2 is fixed to the top of the sampling frame 1 by bolts. A double-coil cooler 5 is fixed to the inner wall of the sampling frame 1 by bolts. The double-coil cooler 5 can cool the sample water. The sampling tube 2 is connected to the double-coil cooler 5, and a high-pressure valve 3 is provided on the outer surface of the sampling tube 2. A connecting pipe is provided at the bottom of the double-coil cooler 5, and a temperature controller 10, a pressure gauge 11, a protection valve 12, and a constant-pressure valve 13 are respectively provided on the outer surface of the first connecting pipe. The temperature controller 10 and the pressure gauge 11 detect the temperature and pressure of the water sample. One end of the first connecting pipe is connected to a constant-temperature cooler 16. The constant-pressure valve 13 is located between the pressure gauge 11 and the constant-temperature cooler 16. A second connecting pipe is provided on one side of the constant-temperature cooler 16, and a throttle valve 17, a water sample filter 18, and a flowmeter 19 are respectively provided on the outer surface of the second connecting pipe. The flowmeter 19 can detect the flow rate in real time. One end of the second connecting pipe is provided with a conductivity meter 20. By detecting with the conductivity meter 20, the conductivity signal of the drain water of each heater is led to the auxiliary network DCS, so as to achieve the purpose of online detection of the conductivity of the drain water of the heat network heater. One end of the second connecting pipe is connected to a low-pressure blowdown pipe 21.

[0031] Among them, a high-pressure blowdown pipe 6 is provided on the inner wall of the sampling frame 1, and one end of the high-pressure blowdown pipe 6 is connected to one end of the double-coil cooler 5. A pressure reducing valve 4 is provided on the outer surface of the high-pressure blowdown pipe 6. A cooling water outlet pipe 8 and a cooling water inlet pipe 9 are respectively provided on one side of the double-coil cooler 5. Ball valves 7 are provided on the outer surfaces of the cooling water outlet pipe 8 and the cooling water inlet pipe 9. A distribution box 14 is fixed to one side of the sampling frame 1 by bolts, and an alarm 15 is fixed to the top of the sampling frame 1 by bolts.

[0032] Working principle of this embodiment: When in use, when water vapor sampling is required, first take samples at the 0-meter drain pipe of each heat network heater, connect the sampling tube 2 to the drain pipe, and control it through the high-pressure valve 3. Then, the double-coil cooler 5 at the bottom cools the water vapor. The cooling water enters from the cooling water inlet pipe 9, passes through the double-coil cooler 5, and then is discharged from the cooling water outlet pipe 8. Drainage is carried out through the high-pressure blowdown pipe 6. Then, the temperature controller 10 and the pressure gauge 11 on the first connecting pipe detect the temperature and pressure of the water sample. Then, the water sample enters the constant-temperature cooler 16 for constant-temperature treatment, is filtered by the water sample filter 18, the flowmeter 19 can detect the flow rate in real time, and after passing through the conductivity meter 20, the conductivity meter 20 detects the conductivity signal of the drain water of each heater and leads it to the auxiliary network DCS to achieve the purpose of online detection of the conductivity of the drain water of the heat network heater. After the detection is completed, the sample water will be discharged uniformly through the low-pressure blowdown pipe 21.

[0033] Embodiment 2

[0034] Refer to Figures 5 - 6, a single-point water vapor sampling device, a connecting pipe 22 is provided on one side of the second connecting pipe, and the connecting pipe 22 is located between the pressure gauge 11 and the constant pressure valve 13. A sampling pipe 23 is provided on one side of the connecting pipe 22, and a sampling head 24 is provided on one side of the sampling pipe 23. A liquid discharge seat 25 is provided on the inner wall of the sampling head 24. A sample outlet hole 29 is opened at the bottom of the sampling head 24. A valve rod 26 is slidably connected to the inner wall of the sampling head 24, and a plug 27 is provided at the bottom of the valve rod 26. A spring 28 is sleeved on the outer surface of the valve rod 26, and the spring 28 is located between the plug 27 and the inner wall of the top of the sampling head 24. The valve rod 26 passes through the top of the sampling head 24 and is rotatably connected to a pressure rod 30. A sampling pump is provided on one side of the second connecting pipe.

[0035] The working principle of this embodiment: When in use, when manual sampling is required, first, a connecting pipe 12 is arranged between the pressure gauge 11 and the constant pressure valve 13 on the first connecting pipe. A sampling pump is also provided on the first connecting pipe. A sampling pipe 23 is arranged on one side of the connecting pipe 12. A sampling head 24 is provided on one side of the sampling pipe 23. By pressing the pressure rod 30, the valve rod 26 is driven to move upward, so that the plug 27 is separated from the liquid discharge seat 25, and the sample water is discharged through the sample outlet hole 29 at the bottom of the sampling head 24, and then manual sampling can be carried out.

[0036] All the electrical components mentioned in this article are electrically connected to the external main controller and 220V mains power supply, and the main controller can be a conventional known device such as a computer that plays a control role.

[0037] In the description of this article, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the description of this article, it should be noted that relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A single-point water vapor sampling device, comprising a sampling frame (1), characterized in that: The top of the sampling rack (1) is fixedly connected to a sampling tube (2), the inner wall of the sampling rack (1) is fixedly connected to a double-coil cooler (5), the sampling tube (2) is connected to the double-coil cooler (5), and a high-pressure valve (3) is provided on the outer surface of the sampling tube (2), a connecting pipe is provided at the bottom of the double-coil cooler (5), and a temperature controller (10), a pressure gauge (11), a protection valve (12) and a constant pressure valve (13) are respectively provided on the outer surface of the first connecting pipe, one end of the first connecting pipe is connected to the constant temperature cooler (16), and the constant pressure valve (13) is located between the pressure gauge (11) and the constant temperature cooler (16), a second connecting pipe is provided on one side of the constant temperature cooler (16), and a throttle valve (17), a water sample filter (18) and a flow meter (19) are respectively provided on the outer surface of the second connecting pipe, one end of the second connecting pipe is provided with a conductivity meter (20), and one end of the second connecting pipe is connected to a low-pressure sewage pipe (21).

2. A single-point water vapor sampling device according to claim 1, characterized in that: The inner wall of the sampling rack (1) is provided with a high-pressure sewage discharge pipe (6), one end of the high-pressure sewage discharge pipe (6) is connected to one end of the double-coil cooler (5), and the outer surface of the high-pressure sewage discharge pipe (6) is provided with a pressure reducing valve (4).

3. A single-point water vapor sampling device according to claim 1, characterized in that: A cooling water outlet pipe (8) and a cooling water inlet pipe (9) are respectively provided on one side of the double coil cooler (5), and a ball valve (7) is provided on the outer surface of the cooling water outlet pipe (8) and the cooling water inlet pipe (9).

4. A single-point water vapor sampling device according to claim 1, characterized in that: A distribution box (14) is fixedly connected to one side of the sampling rack (1), and an alarm (15) is fixedly connected to the top of the sampling rack (1).

5. The single-point water vapor sampling device according to claim 1, characterized in that: A connecting pipe (22) is provided on one side of the second connecting pipe, and the connecting pipe (22) is located between the pressure gauge (11) and the constant pressure valve (13).

6. A single-point water vapor sampling device according to claim 5, characterized in that: A sampling tube (23) is provided on one side of the connecting tube (22), and a sampling head (24) is provided on one side of the sampling tube (23). A liquid drain seat (25) is provided on the inner wall of the sampling head (24), and a sampling hole (29) is provided at the bottom of the sampling head (24).

7. A single-point water vapor sampling device according to claim 6, characterized in that: The inner wall of the sampling head (24) is slidably connected to a valve stem (26), and a plug (27) is provided at the bottom of the valve stem (26). A spring (28) is sleeved on the outer surface of the valve stem (26), and the spring (28) is located between the plug (27) and the inner wall of the top of the sampling head (24). The valve stem (26) passes through the top of the sampling head (24) and is rotatably connected to a pressure rod (30).

8. The single-point water vapor sampling device according to claim 1, characterized in that: A sampling pump is provided on one side of the second connecting pipe.

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