Auxiliary system for compensating secondary water supply and secondary water supply equipment

Abstract

The utility model discloses an auxiliary system for compensating secondary water supply and secondary water supply equipment. The auxiliary system comprises a main supply part, a compensation part and a bidirectional compensator. The bidirectional compensator comprises a limiting pipe, a supporting rod and a piston. The first end of the limiting pipe is connected with the output end of the compensation part, the second end of the bidirectional compensator and the output end of the main supply part are converged to form a water outlet port, and the water outlet port is connected with a user pipe network; the supporting rod is arranged in the limiting pipe and is longer than the limiting pipe; the piston is movably arranged on the supporting rod in a sleeving mode, the outer diameter of the piston is matched with the inner diameter of the limiting pipe, and when the piston moves to the middle of the supporting rod, the first end of the limiting pipe is separated from the output end of the compensation part; when the piston moves to one end of the supporting rod, the first end of the limiting pipe communicates with the output end of the compensation part. According to the utility model, when the municipal water source is short of supply and the main supply part has negative pressure, the municipal water source and the replenishment water source jointly supply water to the user pipe network.

Description

Technical Field

[0001] The utility model relates to the technical field of secondary water supply, in particular to an auxiliary system for compensating secondary water supply and secondary water supply equipment. Background Art

[0002] With rapid economic growth and urbanization, urban water supply systems have become crucial infrastructure for public health and social stability. However, traditional urban water supply methods, particularly those that rely on direct water supply from municipal pipe networks, have exposed limitations when faced with fluctuations in pipe water pressure.

[0003] Traditional flow stabilization tanks were originally designed to stabilize water supply pressure, but in practice, they often struggle due to a mismatch between water demand and incoming water from the pipeline network. Especially during peak usage periods, when water demand far outstrips incoming water from the pipeline network, severe negative pressure often develops within traditional flow stabilization tanks. This phenomenon is not only difficult to effectively address with traditional suppressors, but often forces the water supply system to resort to pump stoppages and wait for water, resulting in extremely unstable water flow. Frequent pump stops and starts pose a serious threat to the pump's service life.

[0004] Another significant issue with traditional flow stabilization tanks is the aging of the water. This prolonged stagnation of water from the pipe network causes a significant deterioration in water quality. This not only impacts the user experience but also poses a potential health risk.

[0005] In order to overcome at least one of the above technical problems, the present invention proposes an auxiliary system for compensating secondary water supply and a secondary water supply device. Utility Model Content

[0006] The purpose of this utility model is to provide an auxiliary system and secondary water supply equipment for compensating secondary water supply, which can enable the municipal water source and the supply water source to supply water to the user's pipeline together when the municipal water source is in short supply and negative pressure occurs in the main supply part, thereby avoiding negative pressure in the main supply part.

[0007] The purpose of this utility model is achieved by the following technical solutions:

[0008] On the one hand, the utility model provides an auxiliary system for compensating secondary water supply, comprising:

[0009] A main water supply unit, wherein an input end of the main water supply unit is connected to a municipal water source;

[0010] a compensation part, wherein an input end of the compensation part is connected to a supply water source;

[0011] A bidirectional compensator, comprising:

[0012] A limiting tube, wherein a first end of the limiting tube is connected to the output end of the compensation part, and a second end of the limiting tube is combined with the output end of the main supply part to form a water outlet port, and the water outlet port is connected to the user pipe network;

[0013] a support rod, the support rod being arranged in the limiting tube and being longer than the limiting tube;

[0014] The piston is movably mounted on the support rod, and the outer diameter of the piston matches the inner diameter of the limiting tube. When the piston moves to the middle of the support rod, the first end of the limiting tube is separated from the output end of the compensation part; when the piston moves to one end of the support rod, the first end of the limiting tube is connected to the output end of the compensation part.

[0015] Furthermore, the bidirectional compensator further includes:

[0016] A first limiting plate and a second limiting plate are respectively arranged at two ends of the support rod.

[0017] Furthermore, the first limiting plate and the second limiting plate both include:

[0018] A circular plate, wherein a through hole is formed in the middle of the circular plate, and the diameter of the through hole is larger than the diameter of the piston;

[0019] A limiting bracket, both ends of which are connected to the circular plate, forming a limiting chamber with the through hole. When the piston moves to the limiting chamber, the water in the compensation part flows into the water outlet port from the gap between the piston and the hole wall of the through hole.

[0020] Furthermore, the first end of the limiting tube is connected to the circular plate of the first limiting plate, and the second end of the limiting tube is connected to the circular plate of the second limiting plate;

[0021] The first end of the support rod is connected to the limiting bracket of the first limiting plate, and the second end of the support rod is connected to the limiting bracket of the second limiting plate;

[0022] The piston comprises a first portion and a second portion arranged in mirror image, wherein the outer peripheries of the first portion and the second portion both have a first chamfered structure;

[0023] The first end and the second end of the position-limiting tube are both provided with a second chamfered structure matching the first chamfered structure.

[0024] Furthermore, the first chamfer structure and the cross section of the limiting tube form a first chamfer;

[0025] The second chamfered structures all form a second chamfer with the cross section of the limiting tube;

[0026] The angles of the first chamfer and the second chamfer are both 25° to 45°.

[0027] Furthermore, the compensation unit includes a first compensation component, and the first compensation component includes:

[0028] At least one water flow compensation tank, wherein the input end of the water flow compensation tank is connected to the supply water source, and the output end of the water flow compensation tank is connected to the first end of the limit pipe;

[0029] A vacuum pump is connected to the top of the water flow compensation tank.

[0030] Furthermore, the compensation portion includes a second compensation component, and the second compensation component includes:

[0031] At least one pressure compensation tank, wherein the input end of the pressure compensation tank is connected to the inert gas source, and the output end of the pressure compensation tank is connected to the output end of the main supply part;

[0032] A second air pressure tank is connected to the top of the pressure compensation tank.

[0033] Furthermore, the auxiliary system further includes a detection unit, which includes:

[0034] a first pressure sensor, the first pressure sensor being used to detect the pressure value of the water outlet port;

[0035] The second pressure sensor is used to detect the pressure value of the main supply part.

[0036] Furthermore, the auxiliary system further includes:

[0037] The tank body has a accommodating cavity for accommodating the main supply part and the compensation part.

[0038] On the other hand, the present invention provides a secondary water supply device, comprising:

[0039] Auxiliary system, the auxiliary system is the auxiliary system for compensating for secondary water supply;

[0040] A water quality monitoring system connected to the input and output ends of the auxiliary system;

[0041] A water pump unit, wherein a first end of the water pump unit is connected to an output end of the auxiliary system, and a second end of the water pump unit is connected to a user pipe network.

[0042] Compared with the prior art, the beneficial effects of the present invention include at least:

[0043] The main supply part is connected with the municipal water source, and can provide a relatively stable water supply basis; the compensation part is connected with the supplementary water source, and can provide additional water supplement in time when the municipal water source is insufficient or the pressure is reduced, thereby ensuring the continuous water supply of the user pipe network; further, the piston moves on the support rod, and the system can adjust the water flow path of the supplementary water source according to the supply relationship of the municipal water source; when the municipal water source is oversupplied, the piston moves to the middle of the support rod, and only the municipal water source supplies water to the user pipe network; when the municipal water source is undersupplied and the main supply part is under negative pressure, the piston moves to one end of the support rod, and the municipal water source and the supplementary water source jointly supply water to the user pipe network. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 is a structural schematic view of a tank body of an embodiment of the utility model.

[0045] Figure 2 is a structural schematic view of an auxiliary system of the compensation secondary water supply of an embodiment of the utility model.

[0046] Figure 3 is another structural schematic view of the auxiliary system of the compensation secondary water supply of an embodiment of the utility model.

[0047] Figure 4 is a partial structural schematic view of a bidirectional compensator of an embodiment of the utility model.

[0048] Figure 5 is a structural schematic view of a bidirectional compensator of an embodiment of the utility model.

[0049] Figure 6 is a structural schematic view of a limiting pipe of an embodiment of the utility model.

[0050] In the figure: 1, main supply part; 2, compensation part; 21, first compensation assembly; 211, vacuum pump; 22, second compensation assembly; 221, second air pressure tank; 3, bidirectional compensator; 31, limiting pipe; 311, second chamfer structure; 32, support rod; 33, piston; 330, first chamfer structure; 3401, first limiting plate; 3402, second limiting plate; 341, round plate; 342, limiting support; 343, limiting chamber; 344, through hole; 4, water pump unit; 100, tank body; 101, municipal water source; 102, user pipe network. DETAILED DESCRIPTION

[0051] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make this disclosure more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. Identical reference numerals in the figures denote identical or similar structures, and thus repeated descriptions thereof will be omitted.

[0052] The words expressing positions and directions described in this utility model are all explained with reference to the accompanying drawings as examples, but they can be changed as needed, and all such changes are included in the protection scope of this utility model.

[0053] In order to solve the problem of large flow difference between water inlet and water outlet demand of pipe network and unstable water pressure, this utility model proposes an auxiliary system for compensating secondary water supply. Figure 1-Figure 3 .

[0054] refer to Figure 1-Figure 2 To address the large difference in flow rates between the inlet and outlet water requirements of the pipe network, the auxiliary system for compensating secondary water supply in this utility model includes: a main supply unit 1, a compensating unit 2, and a bidirectional compensator 3. Furthermore, to monitor system pressure changes in real time, the auxiliary system for compensating secondary water supply may also include a detection unit. Furthermore, to protect internal system equipment from external interference and damage, the auxiliary system for compensating secondary water supply may also include a tank 100.

[0055] When applying, refer to Figure 1 The tank body 100 has a receiving cavity, which can be used to receive the main supply part 1 and the compensation part 2. The main supply part 1 can be a constant pressure tank.

[0056] In actual use, the input of the main supply unit 1 is connected to the municipal water source 101, and the output of the main supply unit 1 is connected to the user pipeline network 102 via a pipeline. This ensures the basic stability and continuity of the water supply and reduces the impact of water source fluctuations on the user pipeline network 102. The input of the compensation unit 2 is connected to the supplementary water source, and the output of the compensation unit 2 is connected to the user pipeline network 102 via a pipeline. This can provide additional water when the municipal water source 101 is insufficient, ensuring a continuous water supply to the user pipeline network 102. In addition, the first end of the bidirectional compensator 3 is connected to the output of the main supply unit 1, and the second end of the bidirectional compensator 3 is connected to the output of the compensator 2.

[0057] In actual application, when the municipal water source 101 is in oversupply, the bidirectional compensator 3 separates the output end of the compensating section 2 from the output end of the main supply section 1, preventing the replenishment water from flowing out of the output end of the compensating section 2 and merging with the municipal water source 101 flowing out of the output end of the main supply section 1, thereby enabling water to be supplied to the user pipe network 102 using only the municipal water source 101. At this time, there is no negative pressure in the main supply section 1, and the main supply section 1 connected to the pipe network is equivalent to a pipe directly connected to the water pump unit 4, effectively avoiding the problem of water quality degradation caused by the long age of water in the main supply section 1. When the municipal water source 101 is in short supply and the main supply section 1 is under pressure, the bidirectional compensator 3 connects the output end of the compensating section 2 with the output end of the main supply section 1, allowing the replenishment water to flow out of the output end of the compensating section 2 and merge with the municipal water source 101 flowing out of the output end of the main supply section 1, thereby enabling the municipal water source 101 and the replenishment water source to jointly supply water to the user pipe network 102.

[0058] In some preferred embodiments, reference Figure 4 and Figure 5 To ensure that when the municipal water source 101 is in oversupply, the bidirectional compensator 3 isolates the output of the compensating unit 2 from the output of the main supply unit 1. When the municipal water source 101 is in short supply and negative pressure is present in the main supply unit 1, the bidirectional compensator 3 connects the output of the compensating unit 2 with the output of the main supply unit 1. The bidirectional compensator 3 of the present invention includes a limiting tube 31, a support rod 32, and a piston 33. Furthermore, to enhance the stability and support performance of the bidirectional compensator 3, the bidirectional compensator 3 may also include a first limiting plate 3401 and a second limiting plate 3402.

[0059] During use, the first end of the stop tube 31 is connected to the output end of the compensating unit 2, and the second end of the stop tube 31 merges with the output end of the main supply unit 1 to form a water outlet port, which is connected to the user pipe network 102. A support rod 32 is disposed within the stop tube 31, and its length is longer than that of the stop tube 31. Preferably, the support rod 32 and the stop tube 31 are coaxially disposed, with both ends of the support rod 32 extending beyond the ends of the stop tube 31. A piston 33 is movably mounted on the support rod 32, and the outer diameter of the piston 33 matches the inner diameter of the stop tube 31. Specifically, when the piston 33 is retained within the stop tube 31, for example, by moving the piston 33 to the middle of the support rod 32, the first end of the stop tube 31 is separated from the output end of the compensating unit 2. This prevents the output end of the compensating unit 2 from diverting the supply water source into the stop tube 31, whereupon the supply water source is then merged with the municipal water source 101 flowing out of the output end of the main supply unit 1 through the stop tube 31. When the piston 33 is disengaged from the limiting tube 31, for example, it moves to one end of the support rod 32, and the first end of the limiting tube 31 is connected to the output end of the compensation part 2, so that the supply water source can flow into the limiting tube 31 through the output end of the compensation part 2, and then the supply water source is merged with the municipal water source 101 flowing out of the output end of the main supply part 1 through the limiting tube 31, so that the municipal water source 101 and the supply water source can jointly supply water to the user pipe network 102. Figure 4 The first and second limit plates 3401 and 3402 are respectively provided at both ends of the support rod 32, and can limit the maximum reciprocating displacement of the piston 33, thereby preventing the piston 33 from separating from the support rod 32. In practice, when the municipal water source 101 alone supplies water to the user pipe network 102 and demand exceeds supply, negative pressure will occur in the main supply unit 1, causing the piston 33 to move to one end of the support rod 32 and separate from the limit tube 31. However, due to the blocking effect of the limit plates, the piston 33 will not separate from the support rod 32.

[0060] In some preferred embodiments, in order to further improve the accuracy of the bidirectional compensator 3 , the first limiting plate 3401 and the second limiting plate 3402 of the present invention both include: a circular plate 341 and a limiting bracket 342 .

[0061] In order to improve the fixation of the limiting tube 31 and the support rod 32, the first end of the limiting tube 31 of the utility model is connected to the circular plate 341 of the first limiting plate 3401, and the second end of the limiting tube 31 is connected to the circular plate 341 of the second limiting plate 3402; the first end of the support rod 32 is connected to the limiting bracket 342 of the first limiting plate 3401, and the second end of the support rod 32 is connected to the limiting bracket 342 of the second limiting plate 3402.

[0062] To ensure that when demand exceeds supply and negative pressure occurs in the main supply unit 1, the first end of the limiting tube 31 can communicate with the output end of the compensation unit 2, ensuring that the supply water source can merge with the municipal water source 101, so that the municipal water source 101 and the supply water source can jointly supply water to the user pipe network 102, a through hole 344 is opened in the middle of the circular plate 341 of the present invention, and the aperture of the through hole 344 is larger than the diameter of the piston 33. Both ends of the limiting bracket 342 are connected to the circular plate 341 and form a limiting chamber 343 with the through hole 344. The limiting chamber 343 is used to accommodate the piston 33 that has been separated from the limiting tube 31. When the piston 33 moves to the limiting chamber 343, the water in the compensation unit 2 flows into the water outlet port through the gap between the piston 33 and the wall of the through hole 344. Specifically, the first end of the limiting tube 31 is connected to the output end of the compensation part 2 through the gap between the piston 33 and the wall of the through hole 344, so that the supply water source flows into the limiting tube 31 through the output end of the compensation part 2, and then the supply water source is merged with the municipal water source 101 flowing out of the output end of the main supply part 1 through the limiting tube 31, thereby realizing that the municipal water source 101 and the supply water source jointly supply water to the user pipeline 102.

[0063] In some preferred embodiments, in order to appropriately increase the difficulty of the piston 33 to escape from the limiting tube 31, the piston 33 of the utility model includes a first portion and a second portion arranged in a mirror image, and the outer peripheries of the first portion and the second portion are both first chamfered structures 330. Figure 4 The first end and the second end of the limiting tube 31 are both provided with a second chamfered structure 311 matching the first chamfered structure 330, Figure 6 The first chamfer structure 330 forms a first chamfer with the cross section of the stop tube 31, and the second chamfer structure 311 forms a second chamfer with the cross section of the stop tube 31. To prevent the piston 33 from loosening and leaking due to excessively large angles, the angles of the first and second chamfers of the present invention are set to 25° to 45°.

[0064] In application, in order to appropriately increase the difficulty of the piston 33 to separate from the limiting tube 31, and to ensure that the piston 33 can be separated from the limiting tube 31 in time when negative pressure occurs in the main supply part 1, the piston 33 is made of rubber material, and the angles of the first chamfer and the second chamfer are large.

[0065] In actual use, in order to improve the efficiency of the replenishment water source supplying water to the user pipe network 102 when the piston 33 is separated from the limiting tube 31, the height of the limiting chamber 343 of the present invention is greater than the thickness of the piston 33. Preferably, the height of the limiting chamber 343 is 1.5 to 2 times the thickness of the piston 33, and the diameter of the limiting chamber 343 is 1.5 to 2 times the diameter of the piston 33. Preferably, the diameter of the limiting chamber 343 is equal to the aperture of the through hole 344, and the height of the limiting chamber 343 is equal to the height of the through hole 344.

[0066] In some preferred embodiments, referring to Figure 2 The compensation unit 2 comprises a first compensation assembly 21. Further, the first compensation assembly 21 comprises at least one water flow compensation tank and a vacuum pump 211.

[0067] In application, in order to improve the compensation effect of water flow, the number of water flow compensation tanks can be determined according to actual needs. The input end of the water flow compensation tank is connected to the water supply source, and the output end of the water flow compensation tank is connected to the first end of the limiting pipe 31.

[0068] In actual application, the vacuum pump 211 is connected to the top of the water flow compensation tank. When multiple water flow compensation tanks supply water to the user pipe network 102 at the same time, the phenomenon of oversupply occurs, and the water flow compensation tanks are closed one by one. Specifically, the valve between the water flow compensation tank and the water supply source is closed, and when the water in the water flow compensation tank flows into the user pipe network 102, the vacuum pump 211 is started to form negative pressure in the water flow compensation tank, and the piston 33 moves along the support rod 32 to the middle of the support rod 32. When the piston 33 moves to the middle of the piston 33, the vacuum pump is closed. Further, when the municipal water source 101 is sufficient for supply, all water flow compensation tanks are closed, and only the municipal water source 101 is used for water supply.

[0069] In some preferred embodiments, referring to Figure 3 The compensation unit 2 comprises a second compensation assembly 22. Further, the second compensation assembly comprises at least one pressure compensation tank and a second air tank 221.

[0070] In application, in order to improve the compensation effect of pressure, the number of pressure compensation tanks can be determined according to actual needs. The input end of the pressure compensation tank is connected to the inert gas source, and the output end of the pressure compensation tank is connected to the output end of the main supply unit 1. In actual application, in order to increase the compensation effect of each pressure compensation tank, the second air tank 221 is connected to the top of the pressure compensation tank.

[0071] When the pressure of the water flowing into the user pipe network 102 is lower than the first preset value, the valve between the input end of the pressure compensation tank and the inert gas source is opened, and when the pressure of the water flowing into the user pipe network 102 is lower than the second preset value, the second air tank 221 is started. Further, in order to increase the pressure compensation effect of the entire system, a first air tank can also be arranged at the top of the water flow compensation tank. When the municipal water source 101 and the water supply source supply water together, the first air tank can be started to increase the pressure of the water flowing into the user pipe network 102.

[0072] In some preferred embodiments, the present invention employs multiple pressure sensors to monitor system pressure changes in real time and provide data support for automatic system adjustments and fault warnings. Specifically, the detection unit of the present invention includes a first pressure sensor, a second pressure sensor, a third pressure sensor, and a fourth pressure sensor. Furthermore, the first pressure sensor is used to detect the pressure at the water outlet; the second pressure sensor is used to detect the pressure at the main supply unit 1; the third pressure sensor is used to detect the pressure at the first compensation component 21; and the fourth pressure sensor is used to detect the pressure at the second compensation component 22.

[0073] In addition, in order to improve the stability and reliability of water supply and ensure the safety and compliance of water quality to meet users' demand for high-quality water supply, the utility model also introduces a secondary water supply equipment.

[0074] The secondary water supply equipment of the present invention includes an auxiliary system, a water quality monitoring system, and a water pump unit 4. Specifically, the auxiliary system is the aforementioned auxiliary system for compensating for secondary water supply; the water quality monitoring system is connected to the input and output of the auxiliary system; the first end of the water pump unit 4 is connected to the output of the auxiliary system, and the second end of the water pump unit 4 is connected to the user pipe network 102.

[0075] In summary, the main supply unit 1 of the present invention can provide a relatively stable water supply foundation by connecting to the municipal water source 101. The compensation unit 2, by connecting to the supplementary water source, can promptly provide additional water when the municipal water source 101 is insufficient or the pressure drops, ensuring continuous water supply to the user pipe network 102. Specifically: through the movement of the piston 33 on the support rod 32, the system can adjust the water flow path of the supplementary water source according to the supply relationship of the municipal water source 101. When the municipal water source 101 is in oversupply, the piston 33 can be moved to the middle of the support rod 32, and only the municipal water source 101 is used to supply water to the user pipe network 102; when the municipal water source 101 is in short supply and negative pressure occurs in the main supply unit 1, the piston 33 moves to one end of the support rod 32, and the municipal water source 101 and the supplementary water source can jointly supply water to the user pipe network 102. Furthermore, the present invention realizes the pressurization of the water flow entering the user pipe network 102 through the pressure compensation tank and the second air pressure tank 221. At the same time, when there is no negative pressure in the main supply part 1, that is, when there is oversupply, the main supply part 1 connected to the pipeline network is equivalent to the pipeline directly connected to the water pump unit 4, which effectively avoids the problem of water quality degradation caused by the long age of water in the main supply part 1.

[0076] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limiting the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the utility model without departing from the principles and purpose of the utility model. All of these changes should fall within the scope of protection of the claims of the present invention.

Claims

1. An auxiliary system for compensating secondary water supply, characterized in that: include: A main supply unit (1), wherein an input end of the main supply unit (1) is connected to a municipal water source (101); A compensation part (2), wherein an input end of the compensation part (2) is connected to a supply water source; A bidirectional compensator (3), comprising: A limiting tube (31), wherein a first end of the limiting tube (31) is connected to the output end of the compensation part (2), and a second end of the limiting tube (31) is combined with the output end of the main supply part (1) to form a water outlet port, and the water outlet port is connected to the user pipe network (102); A support rod (32), the support rod (32) being arranged in the limiting tube (31) and being longer than the limiting tube (31); A piston (33) is movably sleeved on the support rod (32), and the outer diameter of the piston (33) matches the inner diameter of the limiting tube (31). When the piston (33) moves to the middle of the support rod (32), the first end of the limiting tube (31) is separated from the output end of the compensation part (2); when the piston (33) moves to one end of the support rod (32), the first end of the limiting tube (31) is communicated with the output end of the compensation part (2).

2. The auxiliary system for compensating secondary water supply according to claim 1, characterized in that: The bidirectional compensator (3) further comprises: A first limiting plate (3401) and a second limiting plate (3402), wherein the first limiting plate (3401) and the second limiting plate (3402) are respectively arranged at two ends of the support rod (32).

3. The auxiliary system for compensating secondary water supply according to claim 2, characterized in that: The first limiting plate (3401) and the second limiting plate (3402) both include: A circular plate (341), wherein a through hole (344) is formed in the middle of the circular plate (341), and the diameter of the through hole (344) is larger than the diameter of the piston (33); A limiting bracket (342), both ends of which are connected to the circular plate (341), and form a limiting chamber (343) with the through hole (344); when the piston (33) moves to the limiting chamber (343), water in the compensation part (2) flows into the water outlet port from the gap between the piston (33) and the hole wall of the through hole (344).

4. The auxiliary system for compensating secondary water supply according to claim 3, characterized in that: The first end of the limiting tube (31) is connected to the circular plate (341) of the first limiting plate (3401), and the second end of the limiting tube (31) is connected to the circular plate (341) of the second limiting plate (3402); The first end of the support rod (32) is connected to the limiting bracket (342) of the first limiting plate (3401), and the second end of the support rod (32) is connected to the limiting bracket (342) of the second limiting plate (3402); The piston (33) comprises a first portion and a second portion arranged in a mirror image, wherein the outer peripheries of the first portion and the second portion both have a first chamfered structure (330); The first end and the second end of the position-limiting tube (31) are both provided with a second chamfered structure (311) matching the first chamfered structure (330).

5. The auxiliary system for compensating secondary water supply according to claim 4, characterized in that: The first chamfer structure (330) and the cross section of the limiting tube (31) form a first chamfer; The second chamfered structures (311) form a second chamfer with the cross section of the limiting tube (31); The angles of the first chamfer and the second chamfer are both 25° to 45°.

6. The auxiliary system for compensating secondary water supply according to claim 1, characterized in that: The compensation portion (2) includes a first compensation component (21), and the first compensation component (21) includes: at least one water flow compensation tank, wherein the input end of the water flow compensation tank is connected to a supply water source, and the output end of the water flow compensation tank is connected to the first end of the limit pipe (31); A vacuum pump (211) is connected to the top of the water flow compensation tank.

7. The auxiliary system for compensating secondary water supply according to claim 1, characterized in that: The compensation portion (2) includes a second compensation component (22), and the second compensation component includes: At least one pressure compensation tank, wherein the input end of the pressure compensation tank is connected to the inert gas source, and the output end of the pressure compensation tank is connected to the output end of the main supply part (1); A second air pressure tank (221), wherein the second air pressure tank (221) is connected to the top of the pressure compensation tank.

8. The auxiliary system for compensating secondary water supply according to claim 1, characterized in that: The auxiliary system further includes a detection unit, which includes: a first pressure sensor, the first pressure sensor being used to detect a pressure value of a water outlet port; A second pressure sensor is used to detect the pressure value of the main supply part (1).

9. The auxiliary system for compensating secondary water supply according to claim 1, characterized in that: The auxiliary system further includes: A tank body (100) is provided with a receiving cavity, wherein the receiving cavity is used to receive the main supply portion (1) and the compensation portion (2).

10. A secondary water supply device, characterized in that: include: An auxiliary system, wherein the auxiliary system is the auxiliary system for compensating for secondary water supply according to any one of claims 1 to 9; A water quality monitoring system connected to the input and output ends of the auxiliary system; A water pump unit (4), wherein a first end of the water pump unit (4) is connected to an output end of the auxiliary system, and a second end of the water pump unit (4) is connected to a user pipe network (102).

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