A heating network gas analysis device and method

Abstract

The present invention relates to the field of heating technology, and provides a heating network gas analysis device and method, which aims to improve the heating efficiency and solve the problem of gas accumulation in the network. The device includes a water inlet valve assembly, a vacuum tank assembly, an exhaust pressure measuring assembly, a plunger pump assembly and a controller. Through precise liquid level control and the formation of a negative pressure environment, gas precipitation is promoted and accumulated on the top of the vacuum tank. The working process includes standby, water injection, exhaust, vacuuming and drainage, repeated water injection and exhaust, until the gas analysis effect is achieved or the set time is reached. The device can effectively remove gas in the network, reduce pipeline corrosion and noise, improve system stability and service life, save energy, and reduce operating costs.

Description

Technical Field

[0001] The present invention relates to the technical field of heating, and in particular to a heating pipe network gas analysis device and method. Background Art

[0002] The gas separation device is a device used in the secondary heating network. It aims to solve the problem of gas accumulation in the network. The gas accumulation in the network will affect the efficiency and stability of the heating system. The gas separation device is based on Henry's law. It generates a vacuum to separate the free gas and dissolved gas in the water in the network to improve the heating efficiency.

[0003] Existing equipment is usually equipped with a multi-stage centrifugal pump. This configuration often leads to insufficient water outlet pressure and unadjustable outlet pressure. Low water outlet pressure often leads to low vacuum efficiency and long running time, which will affect the speed and effect of gas separation, and require the equipment to run longer to achieve the expected gas separation effect. Under negative pressure, the automatic exhaust valve in the existing equipment may experience back suction, that is, external gas is sucked into the system, which will affect the gas separation effect and may cause internal contamination of the system. Existing equipment may not be precise enough in liquid level control, resulting in excessive or insufficient water injection, affecting the gas separation effect and system safety. Summary of the invention

[0004] In order to solve the problems existing in the background technology, the present invention provides a heating pipe network gas analysis device, including a water inlet valve assembly, a vacuum tank assembly, an exhaust pressure measuring assembly, a plunger pump assembly and a controller, wherein:

[0005] The water inlet valve assembly comprises a water inlet pipe, the right end of the water inlet pipe is a first water inlet, the water inlet pipe is sequentially connected with a first switch valve, a filter and a solenoid valve, and the left end of the water inlet pipe is connected to the vacuum tank assembly;

[0006] The vacuum tank assembly comprises a water tank body, wherein an exhaust pressure measuring end is arranged at the top center of the water tank body, and a water inlet end, a water outlet end and liquid level sensing ends respectively arranged at the high part, the middle part and the low part are arranged on the side wall, and are respectively connected to a high liquid level sensor, a middle liquid level sensor and a low liquid level sensor;

[0007] The exhaust pressure measuring assembly comprises an automatic exhaust valve for large volume, a positive and negative pressure gauge is connected between the automatic exhaust valve for large volume and the exhaust pressure measuring end, and a one-way check valve is arranged at the end of the automatic exhaust valve for large volume;

[0008] The plunger pump assembly includes a first water outlet pipe, a second water outlet pipe, a plunger pump and a second switch valve. The first water outlet pipe is connected to the water outlet end and connected to the plunger pump, and the second water outlet pipe is connected to the second switch valve, and its end is the first water outlet; the controller is connected to and controls the operation of the water inlet valve assembly, the vacuum tank assembly and the plunger pump assembly.

[0009] In a preferred solution, the first switch valve is located between the first water inlet and the filter, and the filter is located between the first switch valve and the solenoid valve.

[0010] In a preferred solution, the water inlet end is flush with the position of the high liquid level sensor, and the water outlet end is flush with the position of the low liquid level sensor.

[0011] In a preferred embodiment, the plunger pump includes a plunger pump housing, a transmission shaft is eccentrically installed inside the plunger pump housing, a variable disk is arranged through the transmission shaft, a return disk and a sliding shoe are arranged on the variable disk, a ball bearing is arranged on the side of the transmission shaft, clamping plates are arranged at both ends of the variable disk, the clamping plates are connected to the plunger, a compression spring is arranged at the end of the outer surface of the transmission shaft, and a ejector pin is arranged at the end of the compression spring.

[0012] In a preferred embodiment, a second water inlet and a second water outlet are provided at the end of the plunger pump housing, which are respectively used to connect the first water outlet pipe and the second water outlet pipe, and a regulating valve is installed on the side close to the second water outlet for adjusting the outlet pressure.

[0013] A method for gas analysis in a heating network is carried out according to the following steps:

[0014] S1, all components of the device are in standby state, the solenoid valve of the water inlet valve assembly is closed, the plunger pump assembly stops working, and the vacuum tank assembly is empty or nearly empty;

[0015] S2, the controller starts, controls the solenoid valve to open, and allows the water in the pipe network to flow into the water tank body of the vacuum tank assembly through the water inlet pipe; the water flows in through the first switch valve, first passes through the filter to remove impurities, and then flows through the solenoid valve into the vacuum tank; as the water level rises, when the water level reaches the high liquid level sensor, the controller receives a signal, controls the solenoid valve to close, and stops water injection;

[0016] S3, at the end of the water filling stage, the air in the water tank body is discharged through the large volume automatic exhaust valve on the top, and the positive and negative pressure gauges monitor the pressure changes during the exhaust process; then, the controller starts the plunger pump assembly, and the plunger pump drives the plunger to reciprocate through the eccentric rotation of the transmission shaft, starting the vacuum and drainage process; water is pumped out from the water outlet end of the vacuum tank assembly, and is discharged to the outside of the device after passing through the first water outlet pipe, the plunger pump, the second water outlet pipe and the second switch valve; as the water is pumped out, a negative pressure environment is formed in the vacuum tank assembly, which promotes the gas in the pipe network to precipitate and gather at the top of the vacuum tank;

[0017] S4, when the negative pressure in the vacuum tank assembly reaches the set value, the controller controls the solenoid valve to open again, allowing the water in the pipe network to quickly flow into the vacuum tank to further precipitate and discharge the gas; repeat the above water injection, exhaust and vacuum process until the set gas separation effect or shutdown time is achieved;

[0018] S5, when the set gas analysis effect or shutdown time is reached, the controller controls the solenoid valve to close, the plunger pump assembly stops working, and the device enters the standby state; in the standby state, each component of the device remains closed or in standby state, waiting for the next start command.

[0019] The beneficial effects achieved by the present invention are:

[0020] First, the large-volume automatic exhaust valve combined with the one-way check valve design can effectively prevent external gas from being sucked back into the system under negative pressure conditions, ensuring the gas analysis effect.

[0021] Second, by setting high, medium and low liquid level sensors, the liquid level can be accurately controlled to ensure the stability and safety of the gas analysis process.

[0022] Third, the regulating valve installed at the end of the plunger pump housing can adjust the outlet pressure, so that the device can adapt to different working conditions and improve the flexibility of the system. The structural design of the eccentric drive shaft, variable plate, slipper and return plate of the plunger pump makes the pumping efficiency high and can quickly evacuate and drain.

[0023] Fourth, by effectively removing the gas in the pipeline network, it reduces problems such as pipeline corrosion and noise, improves the stability and service life of the heating system, and reduces the operating time of the equipment by improving the vacuum efficiency and water outlet pressure, thereby saving energy and reducing operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The overall structure of the present invention Figure 1 ;

[0025] Figure 2 The overall structure of the present invention Figure 2 ;

[0026] Figure 3 It is a structural diagram of a one-way valve of the present invention;

[0027] Figure 4 It is a cross-sectional structural diagram of the plunger pump of the present invention.

[0028] Numbers in the figure:

[0029] 1. Water inlet valve assembly; 101. First switch valve; 102. Filter; 103. Solenoid valve; 104. Water inlet pipe; 1041. First water inlet; 2. Vacuum tank assembly; 201. Water tank body; 2011. Water inlet end; 2012. Water outlet end; 2013. Exhaust pressure measuring end; 202. High liquid level sensor; 203. Medium liquid level sensor; 204. Low liquid level sensor; 3. Exhaust pressure measuring assembly; 301. Large volume automatic exhaust valve; 3011. One-way check valve; 302. Positive and negative pressure gauges ; 4. Piston pump assembly; 401. Piston pump; 411. Compression spring; 412. Ejector pin; 413. Slipper; 414. Variable disk; 415. Drive shaft; 416. Ball bearing; 417. Return disk; 418. Card; 419. Piston pump housing; 4110. Plunger; 4111. Regulating valve; 4112. Second water inlet; 4113. Second water outlet; 402. Second switch valve; 403. First water outlet pipe; 404. Second water outlet pipe; 4041. First water outlet; 5. Controller. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative, and the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0031] Reference Figure 1-Figure 4 The present invention provides a gas analysis device for a heating pipe network, comprising a water inlet valve assembly 1, a vacuum tank assembly 2, an exhaust pressure measuring assembly 3, a plunger pump assembly 4 and a controller 5, wherein the water inlet valve assembly 1 comprises a water inlet pipe 104, the right end of the water inlet pipe 104 is a first water inlet 1041, the water inlet pipe 104 is sequentially connected with a first switch valve 101, a filter 102 and a solenoid valve 103, and the left end of the water inlet pipe 104 is connected to the vacuum tank assembly 2.

[0032] The vacuum tank assembly 2 includes a water tank body 201, an exhaust pressure measuring end 2013 is arranged at the top center of the water tank body 201, and the side wall is provided with a water inlet end 2011, a water outlet end 2012 and liquid level sensing ends respectively arranged at the high part, the middle part and the low part, which are respectively connected to the high liquid level sensor 202, the middle liquid level sensor 203 and the low liquid level sensor 204.

[0033] The exhaust pressure measuring assembly 3 comprises an automatic exhaust valve 301 of large volume, a positive and negative pressure gauge 302 is connected between the automatic exhaust valve 301 of large volume and the exhaust pressure measuring end 2013, and a one-way check valve 3011 is arranged at the end of the automatic exhaust valve 301 of large volume;

[0034] The plunger pump assembly 4 includes a first water outlet pipe 403, a second water outlet pipe 404, a plunger pump 401 and a second switch valve 402. The first water outlet pipe 403 is connected to the water outlet end 2012 and connected to the plunger pump 401. The second water outlet pipe 404 is connected to the second switch valve 402, and its end is a first water outlet 4041. The controller 5 connects and controls the operation of the water inlet valve assembly 1, the vacuum tank assembly 2 and the plunger pump assembly 4.

[0035] The first switch valve 101 is located between the first water inlet 1041 and the filter 102 , and the filter 102 is located between the first switch valve 101 and the solenoid valve 103 .

[0036] The water inlet end 2011 is flush with the high liquid level sensor 202, and the water outlet end 2012 is flush with the low liquid level sensor 204. The plunger pump 401 includes a plunger pump housing 419, a transmission shaft 415 is eccentrically mounted inside the plunger pump housing 419, a variable disk 414 is arranged through the transmission shaft 415, a return disk 417 and a sliding shoe 413 are arranged on the variable disk 414, a ball bearing 416 is arranged on the side of the transmission shaft 415, a clamping plate 418 is arranged at both ends of the variable disk 414, a plunger 4110 is connected to the clamping plate 418, a compression spring 411 is arranged at the end of the outer surface of the transmission shaft 415, and a thimble 412 is arranged at the end of the compression spring 411.

[0037] The end of the plunger pump housing 419 is provided with a second water inlet 4112 and a second water outlet 4113 for connecting the first water outlet pipe 403 and the second water outlet pipe 404 respectively, and a regulating valve 4111 is installed on the side close to the second water outlet 4113 for adjusting the outlet pressure.

[0038] A method for gas analysis in a heating pipe network of the present invention is carried out according to the following steps:

[0039] S1, all components of the device are in standby mode, the solenoid valve 103 of the water inlet valve assembly 1 is closed, the plunger pump assembly 4 stops working, and the vacuum tank assembly 2 is empty or nearly empty;

[0040] S2, the controller 5 is started, and the solenoid valve 103 is controlled to open, allowing the water in the pipe network to flow into the water tank body 201 of the vacuum tank assembly 2 through the water inlet pipe 104; the water flows into the vacuum tank through the first switch valve 101, first passes through the filter 102 to remove impurities, and then flows into the vacuum tank through the solenoid valve 103; as the water level rises, when the water level reaches the high liquid level sensor 202, the controller 5 receives a signal, controls the solenoid valve 103 to close, and stops water injection;

[0041] S3, at the end of the water filling stage, the air in the water tank body 201 is discharged through the large volume automatic exhaust valve 301 at the top, and the positive and negative pressure gauges 302 monitor the pressure changes during the exhaust process; then, the controller 5 starts the plunger pump assembly 4, and the plunger pump 401 drives the plunger 4110 to reciprocate through the eccentric rotation of the transmission shaft 415, and the vacuum and drainage process begins; water is pumped out from the water outlet end 2012 of the vacuum tank assembly 2, and is discharged to the outside of the device after passing through the first water outlet pipe 403, the plunger pump 401, the second water outlet pipe 404 and the second switch valve 402; as the water is pumped out, a negative pressure environment is formed in the vacuum tank assembly 2, which promotes the gas in the pipe network to precipitate and gather at the top of the vacuum tank;

[0042] S4, when the negative pressure in the vacuum tank assembly 2 reaches the set value, the controller 5 controls the solenoid valve 103 to open again, allowing the water in the pipe network to quickly flow into the vacuum tank to further precipitate and discharge the gas; repeat the above water injection, exhaust and vacuum process until the set gas separation effect or shutdown time is achieved;

[0043] S5, when the set gas evolution effect or shutdown time is reached, the controller 5 controls the solenoid valve 103 to close, the plunger pump assembly 4 stops working, and the device enters the standby state; in the standby state, each component of the device remains closed or in the standby state, waiting for the next start command. The detailed process is described as follows:

[0044] The water in the pipe network first flows into the water inlet pipe 104 through the first water inlet 1041, and the water flows through the first switch valve 101, which can control the conduction or cutoff of the water flow, and then the water flows through the filter 102, the filter 102 can remove impurities, and then the water flows through the solenoid valve 103, and the solenoid valve 103 controls the water to flow into the vacuum tank assembly 2 at the water inlet end 2011 according to the set valve opening time. When the water level of the water flowing into the water tank body 201 reaches the high liquid level sensor 202, the pressure in the water tank body 201 is consistent with the pressure of the pipe network, and the air in the water tank body 201 is automatically discharged through the large volume automatic exhaust valve 301 set at the top center position. When the solenoid valve 103 reaches the set closing time, it closes, and the plunger pump assembly 4 starts to work. The plunger pump 401 is driven by the eccentric rotation of the transmission shaft 415 to realize the reciprocating motion of the plunger 4110 to perform vacuumization and drainage. Water is discharged from the water outlet end 10 12 is extracted and discharged through the second switch valve 402 and the second water outlet pipe 404, so that the water storage tank reaches a negative pressure value of more than -0.1Bar. At this time, the air in the water tank body 201 is precipitated and gathered at the top, and the solenoid valve 103 is opened again. The water injection speed is higher than the drainage flow of the plunger pump 401, and the water tank body 201 is filled with water. When the pressure reaches a positive pressure, the air precipitated by the negative pressure is discharged through the large-volume automatic exhaust valve 301. The above process will continue according to the time control set by the solenoid valve 103 until the set shutdown time is reached. The startup and shutdown time required by the solenoid valve 103 is set according to the on-site gas analysis situation. The one-way check valve 3011 set at the end of the large-volume automatic exhaust valve 301 can prevent external gas from entering the water tank body 201 when the negative pressure is low, so as to ensure the gas analysis effect. The positive and negative pressure gauges 302 are connected between the exhaust pressure measuring end 2013 and the large-volume automatic exhaust valve 301 to monitor the pressure change.

[0045] The transmission shaft 415 of the plunger pump 401 is eccentrically installed. The transmission shaft 415 drives the variable disk 414 to rotate. The sliding shoe 413 slides along the contour of the variable disk 414 to push the plunger 4110 to reciprocate in the plunger pump housing 419. The regulating valve 4111 is used to adjust the outlet pressure of the plunger pump 401. The vacuum negative pressure value in the water tank body 201 can reach more than -0.1Bar. According to the solubility of gas dissolved in liquid, the solubility is affected by temperature and pressure. When the pressure is reduced, the solubility of gas will decrease and gas will precipitate; when the movement speed is large, The pressure of the contact surface between the liquid and the air will drop, which has the same effect as the direct pressure drop. The principle of gas precipitation is the same. The greater the vacuum negative pressure value, the higher the vacuum efficiency, which can reduce the equipment operation time and improve the vacuum efficiency. The water outlet pressure value can reach 6-8Mpa, and the water column can reach 600-800M. The problem of selecting the pump body due to the floor height can be avoided. The regulating valve 4111 will not cause the water to flow back when the plunger pump 401 is not working. The controller 5 is respectively connected to the water inlet valve assembly 1, the vacuum tank water storage tank 2 and the plunger pump assembly 4, and the start and stop are controlled according to the set time. The invention can save equipment cost and operation cost.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A heating network gas analysis device, comprising a water inlet valve assembly (1), a vacuum tank assembly (2), an exhaust pressure measuring assembly (3), a plunger pump assembly (4) and a controller (5), wherein: The water inlet valve assembly (1) comprises a water inlet pipe (104), the right end of the water inlet pipe (104) being a first water inlet (1041), the water inlet pipe (104) being connected in sequence to a first switch valve (101), a filter (102) and a solenoid valve (103), and the left end of the water inlet pipe (104) being connected to a vacuum tank assembly (2); The vacuum tank assembly (2) comprises a water tank body (201), wherein the top center of the water tank body (201) is provided with an exhaust pressure measuring end (2013), and the side wall is provided with a water inlet end (2011), a water outlet end (2012), and liquid level sensing ends respectively arranged at the upper part, the middle part, and the lower part, and respectively connected to a high liquid level sensor (202), a middle liquid level sensor (203), and a low liquid level sensor (204); The exhaust pressure measuring assembly (3) comprises an automatic exhaust valve (301) for large volume, a positive and negative pressure gauge (302) is connected between the automatic exhaust valve (301) for large volume and an exhaust pressure measuring end (2013), and a one-way check valve (3011) is arranged at the end of the automatic exhaust valve (301); The plunger pump assembly (4) comprises a first water outlet pipe (403), a second water outlet pipe (404), a plunger pump (401) and a second switch valve (402); the first water outlet pipe (403) is connected to the water outlet end (2012) and connected to the plunger pump (401); the second water outlet pipe (404) is connected to the second switch valve (402), and the end of the second water outlet pipe (404) is a first water outlet (4041); The controller (5) is connected to and controls the operation of the water inlet valve assembly (1), the vacuum tank assembly (2) and the plunger pump assembly (4).

2. The heating network gas analysis device according to claim 1, characterized in that: The first switch valve (101) is located between the first water inlet (1041) and the filter (102), and the filter (102) is located between the first switch valve (101) and the solenoid valve (103).

3. The heating network gas analysis device according to claim 1, characterized in that: The water inlet end (2011) is flush with the high liquid level sensor (202), and the water outlet end (2012) is flush with the low liquid level sensor (204).

4. The heating network gas analysis device according to claim 1, characterized in that: The plunger pump (401) comprises a plunger pump housing (419), a transmission shaft (415) is eccentrically mounted inside the plunger pump housing (419), a variable disk (414) is arranged through the transmission shaft (415), a return disk (417) and a sliding shoe (413) are arranged on the variable disk (414), a ball bearing (416) is arranged on the side of the transmission shaft (415), a clamping plate (418) is arranged at both ends of the variable disk (414), a plunger (4110) is connected to the clamping plate (418), a compression spring (411) is arranged at the end of the outer surface of the transmission shaft (415), and a thimble (412) is arranged at the end of the compression spring (411).

5. The heating network gas analysis device according to claim 1, characterized in that: The end of the plunger pump housing (419) is provided with a second water inlet (4112) and a second water outlet (4113), which are respectively used to connect the first water outlet pipe (403) and the second water outlet pipe (404), and a regulating valve (4111) is installed on the side close to the second water outlet (4113) for adjusting the outlet pressure.

6. A method for gas analysis in a heating network, characterized in that: The gas analysis device for the heating network as claimed in any one of claims 1 to 5 is used and carried out in the following steps: S1, all components of the device are in a standby state, the solenoid valve (103) of the water inlet valve assembly (1) is closed, the plunger pump assembly (4) stops working, and the vacuum tank assembly (2) is empty or nearly empty; S2, the controller (5) is started, and the solenoid valve (103) is controlled to open, allowing water in the pipe network to flow into the water tank body (201) of the vacuum tank assembly (2) through the water inlet pipe (104); the water flows into the vacuum tank through the first switch valve (101), first passes through the filter (102) to remove impurities, and then flows into the vacuum tank through the solenoid valve (103); as the water level rises, when the water level reaches the high liquid level sensor (202), the controller (5) receives a signal, controls the solenoid valve (103) to close, and stops water injection; S3, at the end of the water injection stage, the air in the water tank body (201) is discharged through the large volume automatic exhaust valve (301) at the top, and the positive and negative pressure gauges (302) monitor the pressure changes during the exhaust process; then, the controller (5) starts the plunger pump assembly (4), and the plunger pump (401) drives the plunger (4110) to reciprocate through the eccentric rotation of the transmission shaft (415), and the vacuum and drainage process begins; water is pumped out from the water outlet (2012) of the vacuum tank assembly (2), and is discharged outside the device after passing through the first water outlet pipe (403), the plunger pump (401), the second water outlet pipe (404) and the second switch valve (402); as the water is pumped out, a negative pressure environment is formed in the vacuum tank assembly (2), which promotes the gas in the pipe network to precipitate and gather at the top of the vacuum tank; S4, when the negative pressure in the vacuum tank assembly (2) reaches a set value (e.g., above -0.1 Bar), the controller (5) controls the solenoid valve (103) to open again, allowing the water in the pipe network to quickly flow into the vacuum tank to further precipitate and discharge the gas; the above water injection, exhaust and vacuum process are repeated until the set gas separation effect or shutdown time is achieved; S5, when the set gas evolution effect or shutdown time is reached, the controller (5) controls the solenoid valve (103) to close, the plunger pump assembly (4) stops working, and the device enters a standby state; in the standby state, each component of the device remains closed or in a standby state, waiting for the next start-up command.

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