Centralized liquid supply spring layer equipment and concentrated dialysate supply system

Abstract

The embodiment of the utility model provides concentrated liquid supply spring layer equipment and a concentrated dialysate supply system. The concentrated liquid supply spring layer equipment comprises a buffer tank, a pressure maintaining and releasing valve, a liquid inlet assembly, a liquid outlet assembly and a disinfecting and degassing assembly. The pressure maintaining and releasing valve is used for releasing pressure for the buffer tank when opened and maintaining pressure for the buffer tank when closed. The liquid inlet assembly comprises a liquid inlet pipeline and a liquid inlet valve, and the liquid inlet valve is used for controlling on-off of the liquid inlet pipeline so as to limit communication of the liquid inlet pipeline and the buffer tank. The liquid outlet assembly comprises a liquid outlet pipeline, and the liquid outlet pipeline is connected with the buffer tank and a first liquid supply pipeline of the concentrated dialysate concentrated supply system. The liquid storage tank of the concentrated dialysate supply system and the first dialysis equipment can be arranged in a spring layer mode, and liquid is supplied to the first dialysis equipment. The dialysate entering the buffer tank can relieve the pressure of the dialysate with pressure under the air flow pressure balance effect of the pressure maintaining and releasing valve, and the dialysate suitable for the pressure of the first dialysis equipment is provided for the first liquid supply pipeline.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and in particular to a centralized fluid supply interlayer device and a centralized concentrated dialysis fluid supply system. Background Technology

[0002] Typically, a hospital has multiple treatment rooms for patients undergoing dialysis. These treatment rooms are located on one floor, and the hemodialysis devices in these treatment rooms are supplied with dialysis fluid by a centrally concentrated dialysate system (CCDS).

[0003] However, as the hospital gradually expanded, more treatment rooms were allocated to different floors. Due to the height difference between the different treatment rooms, in order to provide appropriate fluid supply pressure to the hemodialysis machines on different floors (dialysis machines are quite sensitive to fluid supply pressure, and the pressure they can withstand generally does not exceed 100 kPa), an independent centralized concentrated dialysate supply system is usually configured for each floor, but this will increase the cost of the hospital's dialysis equipment. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a centralized fluid supply system for inter-floor hemodialysis devices and a centralized concentrated dialysis fluid supply system, so as to realize the inter-floor fluid supply of concentrated dialysis fluid to hemodialysis devices on different floors. The specific technical solution is as follows:

[0005] In a first aspect, this application provides a centralized liquid supply cascade device, comprising: a buffer tank for storing dialysate; a pressure holding and relief valve disposed on the buffer tank for depressurizing the buffer tank when open and maintaining pressure in the buffer tank when closed; a liquid inlet assembly including a liquid inlet pipeline and a liquid inlet valve, the liquid inlet pipeline being connected to the buffer tank for inputting dialysate into the buffer tank, the liquid inlet valve being used to control the on / off state of the liquid inlet pipeline to restrict the connection between the liquid inlet pipeline and the buffer tank; a liquid outlet assembly including a liquid outlet pipeline connected to the buffer tank for discharging dialysate from the buffer tank; and a disinfection and degassing assembly including a disinfection and degassing pipeline and a disinfection and degassing valve, the disinfection and degassing pipeline being connected to the buffer tank for disinfecting and degassing the buffer tank, the disinfection and degassing valve being used to control the on / off state of the disinfection and degassing pipeline.

[0006] In some embodiments, the inlet and liquid inlet of the disinfection and degassing pipeline are connected, and the outlet of the disinfection and degassing pipeline is connected to the buffer tank.

[0007] In some embodiments, the inlet valve includes a floating ball valve, which includes a valve body and a float. The valve body inlet is connected to the outlet of the inlet pipeline, and the valve body outlet is disposed in a buffer tank. The float of the floating ball valve controls the opening and closing of the inlet pipeline by the rise and fall of the liquid level in the buffer tank. When the liquid level in the buffer tank is higher than a first preset height, the float of the floating ball valve rises, causing the valve body to close. When the liquid level in the buffer tank is lower than a second preset height, the float of the floating ball valve falls, causing the valve body to open. The second preset height is lower than the first preset height.

[0008] In some embodiments, the pressure holding and relief valve is disposed on the top wall of the buffer tank; the valve body is disposed inside the buffer tank; the inlet of the valve body is connected to the inlet pipeline, and the outlet of the valve body does not face the pressure holding and relief valve.

[0009] In some embodiments, the valve body includes a first valve body, one side of which is connected to the side wall of the buffer tank; the float includes a first float and a connecting rod, the first float is located on the other side of the first valve body, the connecting rod connects the first float and the valve core of the first valve body, the first float rises and falls with the change of liquid level in the buffer tank, drives the connecting rod to swing up and down, and acts on the valve core to push the valve core to open and close, so as to control the opening and closing of the liquid inlet pipeline; the liquid outlet of the first valve body faces away from the pressure holding and pressure relief valve.

[0010] In some embodiments, the inlet assembly includes a connecting pipe and an elbow. One side of the connecting pipe is connected to the side wall of the buffer tank and communicates with the inlet pipeline. The first port of the elbow is connected to the other side of the connecting pipe, and the second port of the elbow faces away from the top wall of the buffer tank. The valve body includes a second valve body with opposing first and second ports. A valve port communicating with the first and second ports of the second valve body is provided inside the second valve body. The outlet of the second valve body is provided on the side wall between the valve port and the second port of the second valve body. The first port of the second valve body is connected to the second port of the elbow, and the second port of the second valve body faces away from the pressure holding and relief valve. The float includes a second float located at the bottom of the second valve body. The top of the second float has a valve stem that extends into the second port of the second valve body and faces the valve port. The second float rises and falls with changes in the liquid level in the buffer tank, causing the valve stem to seal or open the valve port to control the opening and closing of the inlet pipeline.

[0011] In some embodiments, the outlet of the disinfection and degassing pipeline is connected to the bottom of the side wall of the buffer tank and is below the height of the floating ball valve.

[0012] In some embodiments, the liquid dispensing assembly further includes a liquid dispensing valve for controlling the opening and closing of the liquid dispensing line.

[0013] In some embodiments, it further includes: an overflow assembly connected to a pressure relief valve for draining dialysate overflowing from the pressure relief valve.

[0014] In some embodiments, it further includes: a drain valve, the inlet of which is connected to an outlet pipeline for discharging the dialysate from the buffer tank through the outlet pipeline.

[0015] Secondly, this application provides a centralized supply system for concentrated dialysate, comprising: a storage tank for storing dialysate, having a first liquid interface and a second liquid interface; the aforementioned centralized supply system with a tiered configuration, wherein an inlet pipe is connected to the first liquid interface of the storage tank for conveying the dialysate from the storage tank to a buffer tank; a first supply pipe connected to an outlet pipe, the first supply pipe having a first supply port for supplying dialysate to a first dialysis device; a second supply pipe connected to the second liquid interface of the storage tank, the second supply pipe having a second supply port for supplying dialysate to a second dialysis device; the first supply port for supplying dialysate to the first dialysis device and the second supply port for supplying dialysate to the second dialysis device are tiered, with the height of the second supply port being higher than the height of the first supply port.

[0016] In some embodiments, the system further includes: a first connecting pipe connecting a first liquid supply pipe and a second liquid supply pipe; and a first valve disposed on the first connecting pipe.

[0017] In some embodiments, the first valve is a one-way valve, used to restrict the flow of dialysate from the second supply line to the first supply port of the first supply line.

[0018] In some embodiments, the system further includes a first liquid supply pump disposed in the liquid inlet line.

[0019] Thirdly, this application provides a centralized supply system for concentrated dialysate, comprising: a storage tank for storing dialysate, having a third liquid interface and a fourth liquid interface; a first cascade device, including the aforementioned centralized supply cascade device, wherein the inlet pipe of the first cascade device is connected to the third liquid interface of the storage tank; a second supply pump, disposed in the inlet pipe of the first cascade device, for conveying dialysate from the storage tank to the buffer tank of the first cascade device; and a third supply pipe, the first end of which is connected to the outlet pipe of the first cascade device, wherein the third supply pipe has... The device includes a third liquid supply port for supplying liquid to a third dialysis device; a second interlayer device, including the aforementioned centralized liquid supply interlayer device, wherein the inlet pipe of the second interlayer device is connected to the second end of the third liquid supply pipe; a fourth liquid supply pipe, wherein both ends of the fourth liquid supply pipe are respectively connected to the fourth liquid interface of the storage tank and the outlet pipe of the second interlayer device, and the fourth liquid supply pipe has a fourth liquid supply port for supplying liquid to a fourth dialysis device; the third liquid supply port for supplying liquid to the third dialysis device and the fourth liquid supply port for supplying liquid to the fourth dialysis device are interlayered, and the height of the fourth liquid supply port is lower than the height of the third liquid supply port.

[0020] Thirdly, this application provides an operating method for the aforementioned centralized concentrated dialysis fluid supply system, comprising: in the fluid supply mode: opening the pressure holding and relief valve of the centralized fluid supply interlayer device and closing the disinfection and degassing valves of the centralized fluid supply interlayer device; when the liquid level in the buffer tank is higher than a first preset height, closing the inlet pipe with the inlet valve to restrict the connection between the inlet pipe and the buffer tank; when the liquid level in the buffer tank is lower than a second preset height, opening the inlet pipe with the inlet valve to transport the dialysis fluid from the storage tank to the buffer tank, thereby maintaining the dialysis fluid in the buffer tank within a predetermined capacity range; in the disinfection and degassing mode: closing the pressure holding and relief valve of the centralized fluid supply interlayer device and opening the disinfection and degassing valves of the centralized fluid supply interlayer device; disinfecting or degassing the centralized concentrated dialysis fluid supply system via the disinfection and degassing pipes.

[0021] In some embodiments, the inlet valve includes a floating ball valve, the valve body inlet of which is connected to the outlet of the inlet pipeline, and the valve body outlet of which is located inside the buffer tank. The float of the floating ball valve controls the opening and closing of the inlet pipeline by the rise and fall of the liquid level in the buffer tank. When the liquid level in the buffer tank is higher than a first preset height, the inlet valve closes the inlet pipeline, restricting the connection between the inlet pipeline and the buffer tank. When the liquid level in the buffer tank is lower than a second preset height, the inlet valve opens the inlet pipeline. Specifically, when the liquid level in the buffer tank is higher than the first preset height, the float of the floating ball valve rises, causing the floating ball valve to close. When the liquid level in the buffer tank is lower than the second preset height, the float of the floating ball valve falls, causing the floating ball valve to open.

[0022] The beneficial effects of this utility model embodiment are as follows:

[0023] This utility model provides a centralized liquid supply layered device and a centralized concentrated dialysis fluid supply system. The centralized liquid supply layered device includes: a buffer tank, a pressure holding and relief valve, a liquid inlet assembly, a liquid outlet assembly, and a disinfection and degassing assembly. The pressure holding and relief valve is used to relieve pressure in the buffer tank when open and to maintain pressure in the buffer tank when closed. The liquid inlet assembly includes a liquid inlet pipeline and a liquid inlet valve. The inlet of the liquid inlet pipeline can be connected to the storage tank of the concentrated dialysis fluid supply system, and the outlet of the liquid inlet pipeline is connected to the buffer tank, for transporting dialysis fluid from the storage tank to the buffer tank. The liquid inlet valve is used to control the opening and closing of the liquid inlet pipeline to restrict the connection between the liquid inlet pipeline and the buffer tank. The liquid outlet assembly includes a liquid outlet pipeline. The disinfection and degassing assembly includes a disinfection and degassing pipeline and a disinfection and degassing valve. The disinfection and degassing pipeline is connected to the buffer tank for disinfecting and degassing the buffer tank. The disinfection and degassing valve is used to control the opening and closing of the disinfection and degassing pipeline.

[0024] When a centralized liquid supply system with multiple layers is applied to a centralized concentrated dialysis fluid supply system, the system can simultaneously supply fluid to both the first and second dialysis units arranged in a multiple-layer configuration. Specifically, the first dialysis unit and its buffer tank are located on the same layer, with the inlet pipeline connected to the first liquid interface of the storage tank to transfer the dialysis fluid from the storage tank to the buffer tank. The first supply pipeline is also connected to the buffer tank. Similarly, the second dialysis unit and the storage tank of the centralized concentrated dialysis fluid supply system are located on the same layer, with the second supply pipeline connected to the second liquid interface of the storage tank.

[0025] In liquid supply mode, the disinfection and degassing valves of the centralized liquid supply mezzanine equipment are closed. Due to the height difference, the dialysate supplied from the storage tank to the buffer tank has a certain pressure. Opening the pressure-holding and pressure-relief valve of the centralized liquid supply mezzanine equipment allows the dialysate entering the buffer tank to release pressure through the airflow pressure balance effect of the pressure-holding and pressure-relief valve. The dialysate from the buffer tank of the centralized liquid supply mezzanine equipment then supplies the first liquid supply line with dialysate at a suitable pressure for the first dialysis device via the outlet pipeline. During the process of the buffer tank supplying liquid to the first dialysis device, the on / off state of the inlet pipeline is controlled by switching the inlet valve, allowing the dialysate from the storage tank to be delivered to the buffer tank, maintaining the dialysate in the buffer tank within a predetermined capacity range. Since the storage tank and the second dialysis device are located on the same floor, the storage tank provides the second liquid supply line with dialysate at a suitable pressure for the second dialysis device.

[0026] In disinfection and degassing mode, close the pressure holding and pressure relief valve of the centralized liquid supply mezzanine equipment to keep the buffer tank in a relatively sealed environment from the outside atmosphere. The pressurized liquid in the buffer tank will not overflow. Open the disinfection and degassing valve of the centralized liquid supply mezzanine equipment to conveniently disinfect or degas the buffer tank and the first liquid supply pipeline through the disinfection and degassing pipeline.

[0027] In the embodiments of this application, the storage tank of the centralized dialysis fluid supply system can be arranged in a layered manner with the first dialysis device to supply fluid to the first dialysis device, and can be easily disinfected or degassed.

[0028] Of course, implementing any product or method of this utility model does not necessarily require achieving all of the above advantages at the same time. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings.

[0030] Figure 1 A schematic diagram of the pipeline connection structure of a centralized liquid supply multi-level device provided in this application embodiment;

[0031] Figure 2 for Figure 1 The diagram shown is a front view of a centralized liquid supply multi-level device.

[0032] Figure 3 for Figure 1 The diagram shown is a top view of a centralized liquid supply multi-level device.

[0033] Figure 4 for Figure 1 The diagram shown is a left-side view of a centralized liquid supply multi-level device.

[0034] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of AA;

[0035] Figure 6 A schematic diagram of another centralized liquid supply tiered device provided in this application embodiment;

[0036] Figure 7 for Figure 6 The diagram shows the main structural view of another centralized liquid supply multi-level device.

[0037] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure of BB;

[0038] Figure 9 for Figure 6 The state of the second valve body and the second float of another centralized liquid supply jump-layer device is shown. Figure 1 ;

[0039] Figure 10 for Figure 6 The state of the second valve body and the second float of another centralized liquid supply jump-layer device is shown. Figure 2 ;

[0040] Figure 11 A schematic diagram of the pipeline in the supply mode of a centralized concentrated dialysis fluid supply system provided in this application embodiment;

[0041] Figure 12 A schematic diagram of the pipeline in the disinfection and degassing mode of a centralized concentrated dialysis fluid supply system provided in this application embodiment;

[0042] Figure 13 A schematic diagram of the piping for another centralized dialysis fluid supply system provided in this application embodiment.

[0043] The attached figures are labeled as follows:

[0044] Buffer tank 10, tank body 11a, valve mounting port 111a, end cap 12a, upper end cap 11b, first side wall 111b, barrel body 12b, lower end cap 13b, pressure holding and pressure relief valve 20, liquid inlet assembly 30, liquid inlet pipeline 31, liquid inlet valve 32, valve body 321, float 322, first valve body 3211a, liquid outlet of the first valve body 32111a, first float 3221a, connecting rod 32 22a, second valve body 3211b, outlet of second valve body 32111b, valve port 32112b, second float 3221b, valve stem 32211b, main valve 33, connecting pipe 34, elbow 35, outlet assembly 40, outlet pipeline 41, outlet valve 42, disinfection and degassing assembly 50, disinfection and degassing pipeline 51, disinfection and degassing valve 52, overflow assembly 60, drain valve 70;

[0045] Storage tank 100, centralized liquid supply interlocking device 200, first interlocking device 200A, second interlocking device 200B, first liquid supply pipeline 300, first liquid supply port 310, second liquid supply pipeline 400, second liquid supply port 410, first connecting pipeline 501, first valve 502, first liquid supply pump 600, second liquid supply pump 910, third liquid supply pipeline 920, third liquid supply port 921, fourth liquid supply pipeline 930, fourth liquid supply port 931;

[0046] First preset height H1, second preset height H2. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art based on this application are within the protection scope of the present utility model.

[0048] In related technologies, when there is a height difference between multiple treatment rooms for dialysis of patients, it is necessary to configure an independent centralized supply system for concentrated dialysate in each treatment room so that the hemodialysis device in each treatment room can obtain dialysate at a suitable pressure. However, such a setup is costly.

[0049] The purpose of this application is to provide a centralized fluid supply system for hemodialysis devices on different floors, and a centralized concentrated dialysis fluid supply system.

[0050] Specifically, the following description, with reference to the accompanying drawings, describes an embodiment of the present application of a centralized liquid supply jump-layer device and a centralized concentrated dialysis fluid supply system.

[0051] Figure 1A schematic diagram of the pipeline connection structure of a centralized liquid supply mezzanine device provided in this application embodiment is shown below. Figure 1 As shown, the purpose of this application is to provide a centralized fluid supply system for hemodialysis devices on different floors, and a centralized concentrated dialysis fluid supply system.

[0052] Specifically, the following description, with reference to the accompanying drawings, describes an embodiment of the present application of a centralized liquid supply jump-layer device and a centralized concentrated dialysis fluid supply system.

[0053] Figure 1 A schematic diagram of the pipeline connection structure of a centralized liquid supply mezzanine device provided in this application embodiment is shown below. Figure 1 As shown, a centralized liquid supply multi-level device 200 includes: a buffer tank 10, a pressure holding and pressure relief valve 20, a liquid inlet assembly 30, a liquid outlet assembly 40, and a disinfection and degassing assembly 50.

[0054] The buffer tank 10 is used to store dialysate; the pressure holding and relief valve 20 is installed on the end cap 12a of the buffer tank 10 to relieve pressure inside the buffer tank 10; the liquid inlet assembly 30 includes a liquid inlet pipe 31 and a liquid inlet valve 32. The liquid inlet pipe 31 is connected to the buffer tank 10 and is used to input dialysate into the buffer tank 10. The liquid inlet valve 32 is used to control the opening and closing of the liquid inlet pipe 31 to restrict the connection between the liquid inlet pipe 31 and the buffer tank 10; the liquid outlet assembly 40 includes a liquid outlet pipe 41, which is connected to the buffer tank 10 and is used to deliver the dialysate from the buffer tank 10; the disinfection and degassing assembly 50 includes a disinfection and degassing pipe 51 and a disinfection and degassing valve 52. The disinfection and degassing pipe 51 is connected to the buffer tank 10 and is used to disinfect and degas the buffer tank 10. The disinfection and degassing valve 52 is used to control the opening and closing of the disinfection and degassing pipe 51.

[0055] The centralized liquid supply interlayer device 200 can be applied to a centralized concentrated dialysis fluid supply system to supply liquid to dialysis equipment that is interlayered with the storage tank 100 of the centralized concentrated dialysis fluid supply system. In application, the buffer tank 10 and the interlayered dialysis equipment are arranged on the same layer. The buffer tank 10 obtains the dialysis fluid from the storage tank 100 through the liquid inlet pipe 31.

[0056] In the liquid supply mode, the disinfection and degassing valves 52 of the centralized liquid supply interlayer device 200 are closed. Due to the height difference, the dialysate supplied from the storage tank 100 to the buffer tank 10 has a certain pressure. The pressure holding and pressure relief valve 20 of the centralized liquid supply interlayer device 200 is opened. The dialysate entering the buffer tank 10 will be depressurized by the airflow pressure balance of the pressure holding and pressure relief valve 20. The dialysate in the buffer tank 10 after depressurization can be easily supplied with dialysate of appropriate pressure to the interlayer dialysis equipment through the liquid outlet pipeline 41.

[0057] In the disinfection and degassing mode, the pressure holding and pressure relief valve 20 of the centralized liquid supply interlayer device 200 is closed, so that the buffer tank 10 is in a relatively sealed environment with the outside atmosphere. The pressurized liquid in the buffer tank 10 will not overflow. The disinfection and degassing valve 52 of the centralized liquid supply interlayer device 200 is opened, and the buffer tank 10 can be conveniently disinfected or degassed through the disinfection and degassing pipeline 51.

[0058] Among them, the pressure holding and pressure relief valve 20 can be the first electric valve. The first electric valve is closed in the disinfection and degassing mode to realize the electric control pressure holding of the buffer tank 10; when the disinfection and degassing mode is switched to the liquid supply mode, the first electric valve is opened to realize the electric control pressure relief of the dialysate in the buffer tank 10.

[0059] The disinfection and degassing valve 52 can be a second electric valve. The second electric valve is opened in the disinfection and degassing mode and closed when the disinfection and degassing mode is switched to the liquid supply mode.

[0060] The inlet of the disinfection and degassing pipeline 51 is connected to the liquid inlet pipeline 31, and the outlet of the disinfection and degassing pipeline 51 is connected to the buffer tank 10. In the disinfection and degassing mode, disinfectant can be delivered to the disinfection and degassing pipeline 51 through the liquid inlet pipeline 31.

[0061] The liquid inlet pipeline 31 is also equipped with a main valve 33 that simultaneously controls the on / off state of the liquid inlet pipeline 31, the disinfection pipeline, and the degassing pipeline 51. The main valve 33 can be a manual valve for easy maintenance of the centralized liquid supply interlayer equipment 200.

[0062] In the liquid supply mode, after the buffer tank 10 delivers dialysate to the dialysis equipment, the liquid level will drop. By controlling the opening and closing of the inlet pipeline 31 through the switch inlet valve 32, the dialysate in the storage tank 100 can be delivered to the buffer tank 10, keeping the dialysate in the buffer tank 10 within a predetermined capacity range.

[0063] Furthermore, in the following embodiments of this solution, the inlet valve 32 controls the opening and closing of the inlet pipeline 31 through an automatic switch, thereby maintaining the dialysate in the buffer tank 10 within a predetermined capacity range. Figure 2 for Figure 1 The diagram shown is a front view of a centralized liquid supply multi-level device. Figure 3 for Figure 1 The diagram shown is a top view of a centralized liquid supply multi-level device. Figure 4 for Figure 1 The diagram shown is a left-side view of a centralized liquid supply multi-level device. Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of AA is shown below. Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the inlet valve 32 includes a floating ball valve, which includes a valve body 321 and a float 322. The inlet of the valve body 321 is connected to the outlet of the inlet pipeline 31, and the outlet of the valve body 321 is located inside the buffer tank 10. The float 322 of the floating ball valve controls the opening and closing of the inlet pipeline 31 by the rise and fall of the liquid level in the buffer tank 10. When the liquid level in the buffer tank 10 is higher than the first preset height H1, the float 322 of the floating ball valve rises, causing the valve body 321 to close, thereby limiting the delivery of dialysate from the storage tank 100 to the buffer tank 10, so as to reduce the probability of overflow from the pressure holding and pressure relief valve 20 due to excessive dialysate in the storage tank 100.

[0064] As the buffer tank 10 continuously supplies dialysate to the dialysis equipment, the amount of dialysate in the buffer tank 10 decreases. When the liquid level in the buffer tank 10 falls below the second preset height H2, the float 322 of the floating ball valve descends, causing the valve body 321 to open, allowing dialysate from the storage tank 100 to be transferred to the buffer tank 10, replenishing the dialysate in the buffer tank 10. The second preset height H2 is lower than the first preset height H1. In this embodiment of the solution, in the liquid supply mode, no manual operation of the floating ball valve is required; the height of the dialysate in the buffer tank 10 can be maintained between the second preset height H2 and the first preset height H1, achieving automatic replenishment of the buffer tank 10 and continuous liquid supply to the dialysis equipment.

[0065] The pressure-holding and pressure-relief valve 20 is located on the top wall of the buffer tank 10; the valve body 321 is located inside the buffer tank 10; the inlet of the valve body 321 is connected to the inlet pipe 31, and the outlet of the valve body 321 does not face the pressure-holding and pressure-relief valve 20. When there is a large height difference between the storage tank 100 and the centralized liquid supply mezzanine device 200, the dialysate supplied from the storage tank 100 to the buffer tank 10 of the centralized liquid supply mezzanine device 200 has a large pressure, and the dialysate is prone to spray out from the outlet of the valve body 321. Since the outlet of the valve body 321 does not face (e.g., away from) the pressure-holding and pressure-relief valve 20, the dialysate is less likely to spray into the pressure-holding and pressure-relief valve 20 and overflow.

[0066] In this embodiment, the floating ball valve can be implemented in two ways, but is not limited to these two methods.

[0067] In one implementation of a floating ball valve, such as Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, valve body 321 includes a first valve body 3211a, one side of which is connected to the side wall of buffer tank 10; float 322 includes a first float 3221a and a connecting rod 3222a, the first float 3221a is located on the other side of the first valve body 3211a, and the connecting rod 3222a connects the first float 3221a and the valve core of the first valve body 3211a. The first float 3221a rises and falls with the change of liquid level in buffer tank 10, which drives the connecting rod 3222a to swing up and down, and acts on the valve core to push the valve core to open and close, so as to control the opening and closing of the liquid inlet pipe 31; the liquid outlet 32111a of the first valve body 3211a faces away from the pressure holding and pressure relief valve 20.

[0068] In specific implementation, the buffer tank 10 is a pressure vessel to meet the pressure requirements under disinfection and degassing modes. Specifically, the buffer tank 10 may include a tank body 11a and a head 12a, with an opening at the top of the tank body 11a, and the head 12a is fastened to the opening at the top of the tank body 11a; a pressure holding and pressure relief valve 20 is disposed on the head 12a. A valve mounting port 111a is provided on the side wall of the tank body 11a, and the liquid inlet side of the first valve body 3211a is disposed at the valve mounting port 111a and connected to the liquid inlet pipeline 31.

[0069] In another implementation of the floating ball valve, Figure 6 This is a schematic diagram of another centralized liquid supply tiered device provided in an embodiment of this application. Figure 7 for Figure 6 The diagram shows the main structural view of another centralized liquid supply mezzanine device. Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure of BB. Figure 9 for Figure 6 The state of the second valve body and the second float of another centralized liquid supply jump-layer device is shown. Figure 1 , Figure 10 for Figure 6 The state of the second valve body and the second float of another centralized liquid supply jump-layer device is shown. Figure 2 ,like Figures 6 to 10As shown, the liquid inlet assembly 30 includes a connecting pipe 34 and an elbow 35. One side of the connecting pipe 34 is connected to the side wall of the buffer tank 10 and communicates with the liquid inlet pipe 31. The first port of the elbow 35 is connected to the other side of the connecting pipe 34, and the second port of the elbow 35 faces away from the top wall of the buffer tank 10. The valve body 321 includes a second valve body 3211b, which has a first port and a second port. A valve port 32112b is provided inside the second valve body 3211b, which communicates with the first port and the second port of the second valve body 3211b. The liquid outlet 32111b of the second valve body 3211b is provided with... The side wall between valve port 32112b and the second port of the second valve body 3211b; the first port of the second valve body 3211b is connected to the second port of the elbow 35, and the second port of the second valve body 3211b faces away from the pressure holding and pressure relief valve 20. The float 322 includes a second float 3221b, which is located at the bottom of the second valve body 3211b. The top of the second float 3221b has a valve stem 32211b, which extends into the second port of the second valve body 3211b and faces the valve port 32112b. The second float 3221b rises and falls according to the liquid level changes in the buffer tank 10. Please refer to [link to relevant documentation]. Figure 9 As shown, the second float 3221b rises due to changes in the liquid level within the buffer tank 10, causing the valve stem 32211b to seal the valve port 32112b. This blocks the liquid outlet 32111b and the valve port 32112b of the second valve body 3211b, thus controlling the disconnection of the inlet pipe 31. Please refer to... Figure 10 As shown, the second float 3221b decreases due to changes in the liquid level within the buffer tank 10, causing the valve stem 32211b to open the valve port 32112b. This connects the outlet 32111b of the second valve body 3211b with the valve port 32112b, controlling the disconnection of the inlet pipe 31. This allows the second float 3221b to rise and fall with changes in the liquid level within the buffer tank 10, causing the valve stem 32211b to seal or open the valve port 32112b, thus controlling the opening and closing of the inlet pipe 31. In this embodiment, because the second float 3221b is located at the bottom of the second valve body 3211b, it occupies less lateral space, which helps reduce the diameter of the buffer tank 10 and makes it suitable for confined spaces.

[0070] It is readily understood that, in specific implementations, the buffer tank 10 is not limited to the structure of the tank body 11a and the end cap 12a described above, and other implementation methods can also be adopted. For example, in this embodiment, the buffer tank 10 includes an upper end cap 11b, a barrel body 12b, and a lower end cap 13b. The barrel body 12b has openings at both ends, and the upper end cap 11b has a vertical first side wall 111b, which is engaged with the top opening of the barrel body 12b. One side of the connecting pipe 34 is connected to the first side wall 111b of the upper end cap 11b. The lower end cap 13b is engaged with the bottom opening of the barrel body 12b. In this embodiment, one side of the connecting pipe 34 is connected to the first side wall 111b of the upper end cap 11b, which helps to reduce the gap between the connecting pipe 34 and the top wall of the upper end cap 11b, and reduce the distance between the second float 3221b and the top wall of the upper end cap 11b. Under the control of the second float 3221b, the liquid level in the buffer tank 10 is higher, thereby increasing the capacity of the buffer tank 10 to hold the dialysis fluid.

[0071] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments, the outlet of the disinfection and degassing pipeline 51 is connected to the bottom of the side wall of the buffer tank 10, and is lower than the height of the floating ball valve. In disinfection and degassing mode, the disinfectant enters the buffer tank 10 through the disinfection and degassing pipeline 51, which can flush the bottom of the tank 11a and improve the disinfection effect.

[0072] In some embodiments, the liquid outlet assembly 40 further includes a liquid outlet valve 42, which is used to control the opening and closing of the liquid outlet pipeline 41. The liquid outlet valve 42 is disposed in the liquid outlet pipeline 41, and can be closed during maintenance to facilitate maintenance operations of the centralized liquid supply interlayer equipment 200.

[0073] In some embodiments, the above-mentioned centralized fluid supply interlayer device 200 further includes an overflow component 60, which is connected to the pressure holding and pressure relief valve 20. For example, when the inlet valve 32 malfunctions, causing the dialysate in the inlet pipeline 31 to continuously flow into the buffer tank 10, the dialysate inside the buffer tank 10 overflows from the pressure holding and pressure relief valve 20. The overflow component 60 can be used to drain the dialysate overflowing from the pressure holding and pressure relief valve 20, reducing the probability that the dialysate overflowing from the pressure holding and pressure relief valve 20 will directly spill into the treatment room and cause contamination.

[0074] In some embodiments, the overflow assembly 60 may include an elbow and a pagoda connector, with a first port of the elbow connected to the outlet of the pressure-holding and pressure-relief valve 20 and a second port of the elbow connected to the pagoda connector. In application, the pagoda connector connects to a hose that drains dialysate overflowing from the pressure-holding and pressure-relief valve 20 to a floor drain. This prevents dialysate from overflowing from the pressure-holding and pressure-relief valve 20 and contaminating the treatment room in the event of an unexpected malfunction of the centralized fluid supply system 200.

[0075] In some embodiments, the centralized liquid supply interlayer device 200 further includes a drain valve 70, the inlet of which is connected to an outlet pipe 41 for discharging the dialysate from the buffer tank 10 through the outlet pipe 41. In application, during maintenance of the centralized liquid supply interlayer device 200, the drain valve 70 can be opened to drain the dialysate from the buffer tank 10, facilitating maintenance by workers. Alternatively, in disinfection and degassing mode, after the disinfectant has completed disinfection of the buffer tank 10, the drain valve 70 can be opened to discharge the disinfectant from the buffer tank 10.

[0076] The centralized fluid supply system 200 is made of materials resistant to acid (pH 1 ≤ 2) and alkaline (pH 9 ≤ 10) corrosion, and resistant to high temperatures (T ≤ 85℃) to meet the operating environment of hemodialysis concentrate A (A solution) and hemodialysis concentrate B (B solution). Specific materials can be polyvinyl chloride (PVC) or polypropylene (PP), etc. The materials of the buffer tank 10, pressure holding and relief valve 20, inlet assembly 30, outlet assembly 40, and disinfection and degassing assembly 50 can be the same or different.

[0077] The centralized fluid supply multi-level equipment described in the above embodiments can be applied to centralized concentrated dialysis fluid supply systems to realize the layout scheme of multi-level treatment rooms. In specific implementation, the hospital has treatment room one located on the basement floor and treatment room two on the first floor. Figure 11 A schematic diagram of the pipeline in the supply mode of a centralized concentrated dialysis fluid supply system provided in this application embodiment is shown below. Figure 11 As shown, a centralized supply system for concentrated dialysis fluid includes: a storage tank 100, a centralized supply system 200 as described in the above embodiment, a first supply pipeline 300, and a second supply pipeline 400.

[0078] A storage tank 100 is used to store dialysate. The storage tank 100 has a first liquid interface and a second liquid interface. An inlet pipe 31 is connected to the first liquid interface of the storage tank 100 and is used to transport the dialysate from the storage tank 100 to the buffer tank 10. A first supply pipe 300 is connected to an outlet pipe 41 and has a first supply port 310 for supplying dialysate to a first dialysis device. A second supply pipe 400 is connected to the second liquid interface of the storage tank 100 and has a second supply port 410 for supplying dialysate to a second dialysis device. The first supply port 310 for supplying dialysate to the first dialysis device and the second supply port 410 for supplying dialysate to the second dialysis device are arranged in a stepped manner, with the height of the second supply port 410 being higher than the height of the first supply port 310.

[0079] The centralized concentrated dialysate supply system can simultaneously supply dialysate to both the first and second dialysis units, which are arranged on different floors. The first dialysis unit and buffer tank 10 are located on the same floor (treatment room one on the basement level). The inlet pipe 31 is connected to the first liquid interface of the storage tank 100 to transfer dialysate from the storage tank 100 to the buffer tank 10. The first supply pipe 300 is connected to the buffer tank 10. The second dialysis unit and the storage tank 100 of the centralized concentrated dialysate supply system are located on the same floor (treatment room two on the first floor). The second supply pipe 400 is connected to the second liquid interface of the storage tank 100.

[0080] In liquid supply mode, please refer to Figure 11 As shown, the disinfection and degassing valves 52 of the centralized liquid supply layered device 200 are closed. Due to the height difference, the dialysate supplied from the storage tank 100 to the buffer tank 10 has a certain pressure. The pressure-holding and pressure-relief valve 20 of the centralized liquid supply layered device 200 is opened. The dialysate entering the buffer tank 10 will be depressurized by the pressure balance effect of the airflow through the pressure-holding and pressure-relief valve 20. The dialysate from the buffer tank 10 of the centralized liquid supply layered device 200 is then supplied to the first liquid supply line 300 via the outlet pipeline 41, providing dialysate at a suitable pressure for the first dialysis device. During the process of the buffer tank 10 supplying liquid to the first dialysis device, the opening and closing of the inlet pipeline 31 is controlled by switching the inlet valve 32, allowing the dialysate from the storage tank 100 to be delivered to the buffer tank 10, maintaining the dialysate in the buffer tank 10 within a predetermined capacity range. Since the storage tank 100 and the second dialysis device are arranged on the same floor, the storage tank 100 provides the second supply line 400 with dialysis fluid at a pressure suitable for the second dialysis device.

[0081] Figure 12 For a pipeline diagram of a centralized dialysis fluid supply system under disinfection and degassing modes provided in this application embodiment, please refer to [link to relevant documentation]. Figure 12 As shown, in the disinfection and degassing mode, the pressure holding and pressure relief valve 20 of the centralized liquid supply interlayer device 200 is closed, so that the buffer tank 10 is in a relatively sealed environment with the outside atmosphere. The pressurized liquid in the buffer tank 10 will not overflow. The disinfection and degassing valve 52 of the centralized liquid supply interlayer device 200 is opened, and the buffer tank 10 and the first liquid supply pipeline 300 can be conveniently disinfected or degassed through the disinfection and degassing pipeline 51.

[0082] In the embodiments of this application, the centralized fluid supply multi-level device 200 expands the fluid supply method of centralized fluid supply equipment, from the existing flat-level fluid supply to fluid supply to the upper floor, lower floor, flat floor, and cross-floor. One centralized concentrated dialysis fluid supply system can be adapted to more treatment rooms, which helps to reduce the hospital's expansion costs for treatment rooms.

[0083] In some embodiments, the system further includes a first connecting pipe 501 and a first valve 502. The first connecting pipe 501 connects to a first liquid supply pipe 300 and a second liquid supply pipe 400; the first valve 502 is disposed on the first connecting pipe 501. For example, as... Figure 12 As shown, the height of the second supply port 410 is higher than the height of the first supply port 310. In the supply mode, the first valve 502 is used to restrict the flow of dialysate from the second supply line 400 to the first supply port 310 of the second supply line 400, avoiding an increase in the supply pressure of the first supply port 310, which helps to maintain the supply pressure of the first supply port 310 and provide dialysate at a suitable pressure for the first dialysis device. Taking the first valve 502 as an example of a switch valve, it can be turned off in the supply mode.

[0084] Specifically, the first supply port 310 for supplying fluid to the first dialysis device and the second supply port 410 for supplying fluid to the second dialysis device are arranged in a stepped manner; the height of the second supply port 410 is higher than the height of the first supply port 310, and the first valve 502 is a one-way valve used to restrict the flow of dialysate from the second supply line 400 to the first supply port 310 of the first supply line 300. Using a one-way valve eliminates the need for additional control in supply mode, making it more convenient to use.

[0085] In the liquid supply mode, the first liquid supply pipeline 300, the buffer tank 10, the first connecting pipeline 501, the second liquid supply pipeline 400, and the storage tank 100 form a loop.

[0086] In some embodiments, a first supply pump 600 is also included. The first supply pump 600 is disposed in the inlet pipeline 31 and can deliver the dialysate in the storage tank 100 to the buffer tank 10.

[0087] In the above embodiment, the storage tank 100 is located on the first floor, and the extended treatment room (treatment room one) is located below the storage tank 100 on the first floor. In specific implementations, the extended treatment room can also be located above the storage tank 100. Figure 13 For a pipeline diagram of another centralized dialysis fluid supply system provided in this application embodiment, please refer to [link / reference]. Figure 1 and Figure 13 As shown in the application scheme, the hospital has treatment room two on the first floor and treatment room three on the second floor. The centralized supply system for concentrated dialysis fluid includes: a storage tank 100, a first tiered device 200A, a second supply pump 910, a third supply pipeline 920, a second tiered device 200B, and a fourth supply pipeline 930.

[0088] The storage tank 100 is used to store dialysate and has a third liquid interface and a fourth liquid interface; the first dialysis unit 200A includes the aforementioned centralized liquid supply dialysis unit 200, and the inlet pipe 31 of the first dialysis unit 200A is connected to the third liquid interface of the storage tank 100; the second liquid supply pump 910 is disposed on the inlet pipe 31 of the first dialysis unit 200A and is used to transport the dialysate from the storage tank 100 to the buffer tank 10 of the first dialysis unit 200A; the first end of the third liquid supply pipe 920 is connected to the outlet pipe 41 of the first dialysis unit 200A, and the third liquid supply pipe 920 has a third liquid supply function for supplying liquid to a third dialysis unit. The second tiered device 200B includes the aforementioned centralized liquid supply tiered device 200. The inlet pipe 31 of the second tiered device 200B is connected to the second end of the third liquid supply pipe 920. The two ends of the fourth liquid supply pipe 930 are respectively connected to the fourth liquid interface of the storage tank 100 and the outlet pipe 41 of the second tiered device 200B. The fourth liquid supply pipe 930 has a fourth liquid supply port 931 for supplying liquid to the fourth dialysis device. The third liquid supply port 921 for supplying liquid to the third dialysis device and the fourth liquid supply port 931 for supplying liquid to the fourth dialysis device are arranged in a tiered manner, and the height of the fourth liquid supply port 931 is lower than the height of the third liquid supply port 921.

[0089] The centralized dialysis fluid supply system can simultaneously supply fluid to the third and fourth dialysis devices arranged in a multi-level layout. Specifically, the third dialysis device and the first multi-level device 200A are located on the same floor (treatment room three on the second floor), while the fourth dialysis device, the second multi-level device 200B, and the fluid storage tank 100 are located on the same floor (treatment room two on the first floor).

[0090] In liquid supply mode, please refer to Figure 13 As shown, the sterilization and degassing valve 52 of the first dialysis unit 200A is closed, and the second supply pump 910 is turned on, allowing the dialysate in the storage tank 100 to be delivered to the buffer tank 10 of the first dialysis unit 200A. The pressure-holding and pressure-relief valve 20 of the first dialysis unit 200A is opened, and the dialysate entering the buffer tank 10 is depressurized by the pressure balance effect of the airflow through the pressure-holding and pressure-relief valve 20. The dialysate in the buffer tank 10 of the first dialysis unit 200A then supplies dialysate at a suitable pressure for the third dialysis unit to the third supply line 920 via the outlet line 41. During the process of the buffer tank 10 supplying dialysate to the third dialysis unit in the first dialysis unit 200A, the opening and closing of the inlet line 31 is controlled by the inlet valve 32, allowing the dialysate in the storage tank 100 to be delivered to the buffer tank 10, maintaining the dialysate in the buffer tank 10 within a predetermined capacity range.

[0091] With the sterilization and degassing valves 52 of the second dialysis unit 200B closed, under gravity, the dialysate from the buffer tank 10 of the first dialysis unit 200A is transported to the buffer tank 10 of the second dialysis unit 200B via the fourth supply line 930. Opening the pressure-holding and pressure-relief valve 20 of the second dialysis unit 200B allows the dialysate entering the buffer tank 10 to depressurize under the pressure balance effect of the airflow through the pressure-holding and pressure-relief valve 20. The dialysate from the buffer tank 10 of the second dialysis unit 200B then supplies the fourth supply line 930 with dialysate at a suitable pressure for the fourth dialysis unit via the outlet line 41. During the process of supplying the fourth dialysis unit from the buffer tank 10 in the second dialysis unit 200B, the opening and closing of the inlet line 31 is controlled by the inlet valve 32, allowing the dialysate from the storage tank 100 to be transported to the buffer tank 10, maintaining the dialysate in the buffer tank 10 within a predetermined capacity range.

[0092] In the liquid supply mode, the liquid storage tank 100, the first interlayer device 200A, the third liquid supply pipeline 920, the second interlayer device 200B, and the fourth liquid supply pipeline 930 form a loop.

[0093] In disinfection and degassing modes: such as Figure 13 As shown, the disinfection and degassing valves 52 of the first interlayer device 200A and the second interlayer device 200B are opened, while the pressure holding and pressure relief valves 20 of the first interlayer device 200A and the second interlayer device 200B are closed. The storage tank 100, the first interlayer device 200A, the third liquid supply line 920, the second interlayer device 200B, and the fourth liquid supply line 930 form a circuit.

[0094] The embodiments of this solution are easy to operate and convenient to use in both liquid supply mode and disinfection and degassing mode.

[0095] This application provides an embodiment of an operating method for the above-mentioned centralized dialysis fluid supply and concentration system, comprising:

[0096] In liquid supply mode:

[0097] Open the pressure holding and pressure relief valve 20 of the centralized liquid supply interlayer device 200, and close the disinfection and degassing valve 52 of the centralized liquid supply interlayer device 200;

[0098] The dialysis fluid in the buffer tank 10 of the centralized liquid supply interlayer device 200 is supplied to the first liquid supply line 300 via the outlet line 41. When the liquid level in the buffer tank 10 is higher than the first preset height H1, the inlet valve 32 closes the inlet line 31 to restrict the connection between the inlet line 31 and the buffer tank 10. When the liquid level in the buffer tank 10 is lower than the second preset height H2, the inlet valve 32 opens the inlet line 31 to transport the dialysis fluid in the storage tank 100 to the buffer tank 10, thereby maintaining the dialysis fluid in the buffer tank 10 within a predetermined capacity range.

[0099] In disinfection and degassing mode:

[0100] Close the pressure holding and pressure relief valve 20 of the centralized liquid supply interlayer equipment 200, and open the disinfection and degassing valve 52 of the centralized liquid supply interlayer equipment 200; disinfect or degas the buffer tank 10 and the first liquid supply pipeline 300 through the disinfection and degassing pipeline 51.

[0101] In some embodiments, the inlet valve 32 includes a floating ball valve. The inlet of the floating ball valve body 321 is connected to the outlet of the inlet pipe 31, and the outlet of the floating ball valve body 321 is located inside the buffer tank 10. The float 322 of the floating ball valve controls the opening and closing of the inlet pipe 31 by the rise and fall of the liquid level in the buffer tank 10. When the liquid level in the buffer tank 10 is higher than the first preset height H1, the inlet valve 32 closes the inlet pipe 31, restricting the communication between the inlet pipe 31 and the buffer tank 10. When the liquid level in the buffer tank 10 is lower than the second preset height H2, the inlet valve 32 opens the inlet pipe 31. Specifically, when the liquid level in the buffer tank 10 is higher than the first preset height H1, the float 322 of the floating ball valve rises, causing the floating ball valve to close. When the liquid level in the buffer tank 10 is lower than the second preset height H2, the float 322 of the floating ball valve falls, causing the floating ball valve to open.

[0102] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A centralized liquid supply cascade device, characterized in that, include: Buffer tank (10) for storing dialysate; A pressure-holding and pressure-relief valve (20) is provided in the buffer tank (10) for relieving pressure in the buffer tank (10) when it is opened and for maintaining pressure in the buffer tank (10) when it is closed; The liquid inlet assembly (30) includes a liquid inlet pipe (31) and a liquid inlet valve (32). The liquid inlet pipe (31) is connected to the buffer tank (10) and is used to input dialysate into the buffer tank (10). The liquid inlet valve (32) is used to control the opening and closing of the liquid inlet pipe (31) to limit the connection between the liquid inlet pipe (31) and the buffer tank (10). The liquid outlet assembly (40) includes a liquid outlet pipeline (41) connected to the buffer tank (10) for discharging the dialysate from the buffer tank (10); The disinfection and degassing assembly (50) includes a disinfection and degassing pipeline (51) and a disinfection and degassing valve (52). The disinfection and degassing pipeline (51) is connected to the buffer tank (10) and is used to disinfect and degas the buffer tank (10). The disinfection and degassing valve (52) is used to control the opening and closing of the disinfection and degassing pipeline (51).

2. The centralized liquid supply jump-level device according to claim 1, characterized in that, The inlet of the disinfection and degassing pipeline (51) is connected to the liquid inlet pipeline (31), and the outlet of the disinfection and degassing pipeline (51) is connected to the buffer tank (10).

3. The centralized liquid supply jump-level device according to claim 1, characterized in that, The inlet valve (32) includes a floating ball valve, which includes a valve body (321) and a float (322). The inlet of the valve body (321) is connected to the outlet of the inlet pipeline (31), and the outlet of the valve body (321) is located inside the buffer tank (10). The float (322) of the floating ball valve controls the opening and closing of the inlet pipe (31) by the rise and fall of the liquid level in the buffer tank (10). When the liquid level in the buffer tank (10) is higher than the first preset height (H1), the float (322) of the floating ball valve rises, causing the valve body (321) to close. When the liquid level in the buffer tank (10) is lower than the second preset height (H2), the float (322) of the floating ball valve falls, causing the valve body (321) to open. The second preset height (H2) is lower than the first preset height (H1).

4. The centralized liquid supply jump-level device according to claim 3, characterized in that, The pressure-holding and pressure-relief valve (20) is disposed on the top wall of the buffer tank (10); The valve body (321) is disposed inside the buffer tank (10); The inlet of the valve body (321) is connected to the inlet pipe (31), and the outlet of the valve body (321) does not face the pressure holding and pressure relief valve (20).

5. The centralized liquid supply jump-level device according to claim 4, characterized in that, The valve body (321) includes a first valve body (3211a), one side of which is connected to the side wall of the buffer tank (10); The float (322) includes a first float (3221a) and a connecting rod (3222a). The first float (3221a) is located on the other side of the first valve body (3211a). The connecting rod (3222a) connects the first float (3221a) and the valve core of the first valve body (3211a). The first float (3221a) rises and falls with the change of liquid level in the buffer tank (10), which drives the connecting rod (3222a) to swing up and down and act on the valve core to push the valve core to open and close, so as to control the opening and closing of the liquid inlet pipe (31). The outlet (32111a) of the first valve body (3211a) faces away from the pressure holding and relief valve (20).

6. The centralized liquid supply jump-level device according to claim 4, characterized in that, The liquid inlet assembly (30) includes a connecting pipe (34) and an elbow (35). One side of the connecting pipe (34) is connected to the side wall of the buffer tank (10) and communicates with the liquid inlet pipeline (31). The first port of the elbow (35) is connected to the other side of the connecting pipe (34), and the second port of the elbow (35) faces away from the top wall of the buffer tank (10). The valve body (321) includes a second valve body (3211b), which has a first port and a second port. A valve port (32112b) is provided inside the second valve body (3211b) to communicate with the first port and the second port of the second valve body (3211b). The liquid outlet (32111b) of the second valve body (3211b) is located on the side wall between the valve port (32112b) and the second port of the second valve body (3211b). The first port of the second valve body (3211b) is connected to the second port of the elbow (35), and the second port of the second valve body (3211b) faces away from the pressure holding and relief valve (20); The float (322) includes a second float (3221b), which is disposed at the bottom of the second valve body (3211b). The top of the second float (3221b) has a valve stem (32211b), which extends into the second port of the second valve body (3211b) and faces the valve port (32112b). The second float (3221b) rises and falls with the change of liquid level in the buffer tank (10), causing the valve stem (32211b) to seal or open the valve port (32112b) to control the opening and closing of the liquid inlet pipeline (31).

7. The centralized liquid supply jump-level device according to claim 3, characterized in that, The outlet of the disinfection and degassing pipeline (51) is connected to the bottom of the side wall of the buffer tank (10) and is lower than the height of the floating ball valve.

8. The centralized liquid supply jump-level device according to claim 1, characterized in that, The liquid outlet assembly (40) further includes a liquid outlet valve (42), which is used to control the opening and closing of the liquid outlet pipeline (41).

9. The centralized liquid supply jump-level device according to claim 1, characterized in that, Also includes: An overflow assembly (60) is connected to the pressure holding and relief valve (20) for draining the dialysate overflowing from the pressure holding and relief valve (20).

10. The centralized liquid supply jump-level device according to claim 1, characterized in that, Also includes: A drain valve (70) is provided, the inlet of which is connected to the outlet pipe (41) for discharging the dialysis fluid from the buffer tank (10) through the outlet pipe (41).

11. A centralized system for supplying concentrated dialysate, characterized in that, include: A storage tank (100) for storing dialysate, having a first liquid inlet and a second liquid inlet; The centralized liquid supply interlayer device according to any one of claims 1 to 10, wherein the liquid inlet pipeline (31) is connected to the first liquid interface of the liquid storage tank (100) for conveying the dialysate of the liquid storage tank (100) to the buffer tank (10); A first liquid supply line (300) is connected to the liquid outlet line (41), and the first liquid supply line (300) has a first liquid supply port (310) for supplying liquid to the first dialysis device; The second liquid supply line (400) is connected to the second liquid interface of the liquid storage tank (100), and the second liquid supply line (400) has a second liquid supply port (410) for supplying liquid to the second dialysis device; The first liquid supply port (310) for supplying liquid to the first dialysis device and the second liquid supply port (410) for supplying liquid to the second dialysis device are arranged in a stepped manner, with the height of the second liquid supply port (410) being higher than the height of the first liquid supply port (310).

12. The centralized dialysis fluid supply system according to claim 11, characterized in that, Also includes: The first connecting pipe (501) connects the first liquid supply pipe (300) and the second liquid supply pipe (400); The first valve (502) is installed in the first connecting pipeline (501).

13. The centralized dialysis fluid supply system according to claim 12, characterized in that, The first valve (502) is a one-way valve, used to restrict the flow of dialysate from the second supply line (400) to the first supply port (310) of the first supply line (300).

14. The centralized dialysis fluid supply system according to claim 12, characterized in that, Also includes: The first liquid supply pump (600) is installed in the liquid inlet pipeline (31).

15. A centralized system for supplying concentrated dialysate, characterized in that, include: A storage tank (100) for storing dialysate, having a third liquid inlet and a fourth liquid inlet; The first interlayer device (200A) includes the centralized liquid supply interlayer device according to any one of claims 1 to 10, wherein the liquid inlet pipe (31) of the first interlayer device (200A) is connected to the third liquid interface of the liquid storage tank (100); The second liquid supply pump (910) is installed in the liquid inlet pipeline (31) of the first interlayer device (200A) and is used to transport the dialysate from the storage tank (100) to the buffer tank (10) of the first interlayer device (200A). The third liquid supply line (920) is connected at its first end to the liquid outlet line (41) of the first interlayer device (200A). The third liquid supply line (920) has a third liquid supply port (921) for supplying liquid to the third dialysis device. The second interlayer device (200B) includes the centralized liquid supply interlayer device according to any one of claims 1 to 10, wherein the liquid inlet pipe (31) of the second interlayer device (200B) is connected to the second end of the third liquid supply pipe (920); The fourth liquid supply line (930) is connected at both ends to the fourth liquid interface of the storage tank (100) and the liquid outlet line (41) of the second interlayer device (200B), respectively. The fourth liquid supply line (930) has a fourth liquid supply port (931) for supplying liquid to the fourth dialysis device. The third liquid supply port (921) for supplying liquid to the third dialysis device and the fourth liquid supply port (931) for supplying liquid to the fourth dialysis device are arranged in a layered manner, and the height of the fourth liquid supply port (931) is lower than the height of the third liquid supply port (921).

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