Heat supply pipe network gassing device

Abstract

The utility model relates to the technical field of heat supply, provides a heat supply pipe network gassing device, and aims to improve heat supply efficiency and solve the problem of gas accumulation in a pipe network. The device comprises a water inlet valve assembly, a vacuum tank assembly, an exhaust pressure measuring assembly, a plunger pump assembly and a controller. And through accurate liquid level control and negative pressure environment formation, gas is promoted to be separated out and gathered at the top of the vacuum tank. The working process comprises the steps of standby, water injection, exhaust, vacuumizing and drainage, and water injection and exhaust are repeated until the gassing effect is achieved or the time is set. The device can effectively remove gas in a pipe network, reduce pipeline corrosion and noise, improve system stability, prolong the service life, save energy and reduce operation cost.

Description

Technical Field

[0001] The utility model relates to the technical field of heating, in particular to a gas analysis device for a heating pipe network. Background Art

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

[0003] Existing equipment is typically equipped with a multi-stage centrifugal pump. This configuration often results in insufficient outlet water pressure and unadjustable outlet pressure. Low outlet water pressure often leads to low vacuum efficiency and prolonged run times, which in turn affects the speed and effectiveness of gas evolution, requiring the equipment to run longer to achieve the desired gas evolution results. Under negative pressure, the automatic exhaust valve in existing equipment may experience backdraft, whereby external gas is drawn into the system. This can affect gas evolution and potentially lead to internal contamination. Existing equipment can also lack precise liquid level control, resulting in over- or under-injection of water, impacting gas evolution and system safety. Utility Model Content

[0004] In order to solve the problems existing in the background technology, the utility model provides a gas analysis device for a heating pipe network, comprising 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 includes a water inlet pipe, the right end of the water inlet pipe is a first water inlet, the water inlet pipe is sequentially connected to 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 includes a water tank body, an exhaust pressure measuring end is provided at the top center of the water tank body, and a water inlet end, a water outlet end and liquid level sensing ends respectively provided at the high part, the middle part and the low part, which are connected to the high liquid level sensor, the middle liquid level sensor and the low liquid level sensor respectively;

[0007] The exhaust pressure measuring assembly includes an automatic exhaust valve with a large volume, a positive and negative pressure gauge is connected between the automatic exhaust valve with a large volume and an exhaust pressure measuring end, and a one-way check valve is provided at the end of the automatic exhaust valve with a 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. The second water outlet pipe is connected to the second switch valve, and its end is the first water outlet. The controller connects 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 high liquid level sensor, and the water outlet end is flush with the low liquid level sensor.

[0011] In the preferred solution, 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, a clamping plate is arranged at both ends of the variable disk, the clamping plate is connected to the plunger, a compression spring is arranged at the end of the outer surface of the transmission shaft, and a thimble 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 near the second water outlet for adjusting the outlet pressure.

[0013] The beneficial effects achieved by the utility model are:

[0014] 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.

[0015] 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.

[0016] 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 water.

[0017] Fourth, by effectively removing gas from the pipeline network, problems such as pipeline corrosion and noise are reduced, the stability and service life of the heating system are improved, and by improving vacuum efficiency and water outlet pressure, the operating time of the equipment is reduced, thereby saving energy and reducing operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The overall structure of the utility model Figure 1 ;

[0019] Figure 2 The overall structure of the utility model Figure 2 ;

[0020] Figure 3This is a structural diagram of a one-way valve of the present utility model;

[0021] Figure 4 It is a cross-sectional structural diagram of the plunger pump of the present utility model.

[0022] Numbers in the figure:

[0023] 1. Water inlet valve assembly; 101. First on-off 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. Automatic large volume exhaust valve; 3011. One-way check valve; 302. Positive and negative pressure gauges ; 4. Plunger pump assembly; 401. Plunger pump; 411. Compression spring; 412. Ejector pin; 413. Slipper; 414. Variable disk; 415. Drive shaft; 416. Ball bearing; 417. Return disk; 418. Clamp; 419. Plunger 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

[0024] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely examples. The present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] Reference Figure 1-Figure 4 The utility model 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 connected in sequence 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.

[0026] The vacuum tank assembly 2 includes a water tank body 201, an exhaust pressure measuring end 2013 is provided at the top center of the water tank body 201, and a water inlet end 2011, a water outlet end 2012 and liquid level sensing ends respectively arranged at the high part, middle part and 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.

[0027] The exhaust pressure measuring assembly 3 includes 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 the exhaust pressure measuring end 2013, and a one-way check valve 3011 is provided at the end of the automatic exhaust valve 301 for large volume;

[0028] 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.

[0029] 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 .

[0030] The water inlet end 2011 is aligned with the high liquid level sensor 202, and the water outlet end 2012 is aligned with the low liquid level sensor 204. The plunger pump 401 includes a plunger pump housing 419, within which a transmission shaft 415 is eccentrically mounted. A variable disk 414 is provided through the transmission shaft 415, on which a return disk 417 and a sliding shoe 413 are provided. A ball bearing 416 is provided on the side of the transmission shaft 415, and a clamping plate 418 is provided at each end of the variable disk 414. The clamping plate 418 is connected to a plunger 4110. A compression spring 411 is provided at the end of the outer surface of the transmission shaft 415, and a thimble 412 is provided at the end of the compression spring 411.

[0031] 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 near the second water outlet 4113 for adjusting the outlet pressure.

[0032] A gas analysis method for a heating pipe network of the present invention is carried out according to the following steps:

[0033] 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;

[0034] S2. The controller 5 starts and controls the solenoid valve 103 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 enters through the first switch valve 101, first passes through the filter 102 to remove impurities, and then flows through the solenoid valve 103 to enter the vacuum tank. As the water level rises, when the water level reaches the high liquid level sensor 202, the controller 5 receives a signal and controls the solenoid valve 103 to close, stopping water injection.

[0035] 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, starting the vacuum and drainage process; water is pumped out from the water outlet end 2012 of the vacuum tank assembly 2, passes through the first water outlet pipe 403, the plunger pump 401, the second water outlet pipe 404 and the second switch valve 402, and is discharged to the outside of the device; as the water is pumped out, a negative pressure environment is formed in the vacuum tank assembly 2, which promotes the precipitation of gas in the pipe network and accumulates at the top of the vacuum tank;

[0036] 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 gas; the above water injection, exhaust and vacuum process are repeated until the set gas separation effect or shutdown time is achieved;

[0037] S5, when the set gasification 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, all components of the device remain closed or in standby state, waiting for the next start command. The detailed process is described as follows:

[0038] 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, which can remove impurities, and then the water flows through the solenoid valve 103. 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 vacuum and drainage, and 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 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 pressure is negative, thereby ensuring 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 changes.

[0039] 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, pushing 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. As the gas dissolves in the liquid, the solubility is affected by temperature and pressure. When the pressure decreases, the gas solubility will decrease and the gas will precipitate. When the movement speed is large, This reduces the pressure at the interface between liquid and air, achieving the same effect as a direct pressure drop. The principle of gas precipitation is the same. A higher vacuum pressure increases vacuum efficiency, reducing equipment operating time and improving vacuum efficiency. The water outlet pressure can reach 6-8 MPa, and the water column can reach 600-800 m. This avoids issues with pump selection due to floor height. When plunger pump 401 is not operating, regulating valve 4111 prevents water backflow. Controller 5 is connected to water inlet valve assembly 1, vacuum tank water storage tank 2, and plunger pump assembly 4, controlling start and stop times according to set times. This utility model can save equipment and operating costs.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection 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 the vacuum tank assembly (2); The vacuum tank assembly (2) comprises a water tank body (201), wherein an exhaust pressure measuring end (2013) is provided at the center of the top of the water tank body (201), and a water inlet end (2011), a water outlet end (2012), and liquid level sensing ends respectively provided at the upper, middle, and lower parts of the side wall, which are 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 provided 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 its end 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) includes a plunger pump housing (419), a transmission shaft (415) is eccentrically mounted inside the plunger pump housing (419), a variable disk (414) is provided through the transmission shaft (415), a return disk (417) and a sliding shoe (413) are provided on the variable disk (414), a ball bearing (416) is provided on the side of the transmission shaft (415), a clamping plate (418) is provided at both ends of the variable disk (414), the clamping plate (418) is connected to the plunger (4110), a compression spring (411) is provided at the end of the outer surface of the transmission shaft (415), and a thimble (412) is provided at the end of the compression spring (411).

5. The heating network gas analysis device according to claim 4, 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.

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