Double-pump liquid supply structure of continuous liquid supply system

Abstract

This application relates to the field of chemical fluid supply technology, specifically a dual-pump supply structure for a continuous fluid supply system. When the main supply pump fails during chemical fluid supply, this application enables an electric telescopic rod to move a connecting plate away from the connecting pipe. This allows sealing plugs one and two to move synchronously with the linkage rod, sealing the outlet pipe one and the main supply pipe while simultaneously connecting the outlet pipe two to the main supply pipe. At the same time, the pressure plate at one end of the linkage rod separates from the main pump switch, disconnecting the main supply pump circuit, while the pressure plate at the other end contacts the standby pump switch, connecting the standby pump circuit. This synchronizes the stopping of the main supply pump and the starting of the standby pump, preventing supply interruptions when switching to the standby pump after the main supply pump fails, and ensuring a normal supply of chemical fluids.

Description

Technical Field

[0001] This application relates to the field of chemical fluid supply technology, and in particular to a dual-pump supply structure for a continuous fluid supply system. Background Technology

[0002] The dual-pump supply structure is a common design in continuous liquid supply systems for chemical fluids, primarily used to ensure the continuity, stability, and safety of liquid supply. By using two pumps operating in parallel, it ensures that if one pump fails or requires maintenance, the other can continue supplying liquid, avoiding supply interruptions.

[0003] The existing dual-pump continuous liquid supply system for chemical fluids mainly consists of a base plate, a main supply pump installed on the upper part, a standby pump installed on one side of the main supply pump, a connecting pipe installed at the outlet of the main supply pump and the standby pump, and a main supply pipe installed at the outlet of the connecting pipe. During the liquid supply process, this dual-pump continuous liquid supply system for chemical fluids mainly achieves convenient switching between the main supply pump and the standby pump by installing electrically controlled valves at the outlets of the main supply pump and the standby pump respectively. In the event of failure of the main supply pump, the circuit of the main supply pump is disconnected and the circuit of the standby pump is connected, and at the same time, the corresponding electrically controlled valve is opened.

[0004] While the existing dual-pump supply structure of continuous chemical fluid supply systems can facilitate the switching of a backup pump when the main supply pump fails, the startup of the backup pump and the shutdown of the main supply pump are not synchronized during the switching process. This can lead to an interruption in the supply of chemical fluids when the main supply pump fails, resulting in lower supply efficiency and impacting production progress. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this application is to provide a dual-pump liquid supply structure for a continuous liquid supply system that enables the simultaneous stopping of the main liquid supply pump and the starting of the standby pump, thereby avoiding interruptions in the supply of chemical fluids.

[0006] The above-mentioned objective of this application is achieved through the following technical solution:

[0007] A continuous liquid supply system with a dual-pump structure includes a base plate. A main supply pump is installed on one side of the top of the base plate, and a standby pump is installed on the other side. The main supply pump and the standby pump are identical in model and structure. Both the main supply pump and the standby pump have inlet pipes installed at their inlets. The main supply pump has an outlet pipe (first type) installed at its outlet, and the standby pump has an outlet pipe (second type) installed at its outlet. The outlets of both outlet pipes are connected to a connecting pipe. A main supply pipe is installed at the outlet of the connecting pipe. A linkage switching mechanism is installed on the main supply pipe. The linkage switching mechanism includes a main pump switch, a pressure plate, a sealing plug plate (first type), a linkage rod, a sealing plug plate (second type), an electric telescopic rod, a connecting plate, and a standby pump switch. Both outlet pipes have a one-way valve for one-way drainage. A drain pipe with a built-in valve is also installed at the bottom center of both outlet pipes.

[0008] Optionally, the connecting pipe is connected to the first liquid outlet pipe, the second liquid outlet pipe, and the main liquid supply pipe, and the connecting pipe has a sealed structure at both ends.

[0009] Optionally, the linkage rod passes through one end of the connecting pipe and is slidably sealed with the first connecting pipe; the first sealing plug is installed on the linkage rod near the first liquid outlet pipe; and the second sealing plug is installed on the linkage rod near the second liquid outlet pipe.

[0010] Optionally, both the first sealing plug and the second sealing plug are inserted into the linkage rod, and both the first sealing plug and the second sealing plug are slidably sealed with the connecting pipe.

[0011] Optionally, the main pump switch is installed at one end of the connecting pipe, and the standby pump switch is installed at the other end of the connecting pipe. Both the main pump switch and the standby switch are constant pressure open / close type switches.

[0012] Optionally, there are two pressure plates: one pressure plate is installed on the linkage rod near the main pump switch, and the other pressure plate is installed on the linkage rod near the standby pump switch.

[0013] Optionally, a quick-release assembly is installed between the main pump and the base plate, and between the standby pump and the base plate. The quick-release assembly includes a T-shaped slider, a limiting hole, a limiting post, a pull plate, a spring, and a T-shaped groove.

[0014] Optionally, the T-shaped groove is formed on the base plate, and both the main liquid supply pump and the standby pump cooperate with the T-shaped groove through corresponding T-shaped sliders.

[0015] Optionally, the limiting hole is formed on the T-shaped slider, one end of the spring is welded to the pull plate, the other end of the spring is welded to the concave structure on the base plate, one end of the limiting post is welded to the pull plate, the limiting post passes through the spring, and the end of the limiting post facing away from the pull plate slides in cooperation with the limiting hole.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] This invention involves installing a connecting pipe between the outlet pipe 1 of the main supply pump and the outlet pipe 2 of the standby pump. A linkage switching mechanism, consisting of a main pump switch, pressure plate, sealing plug plate 1, linkage rod, sealing plug plate 2, electric telescopic rod, connecting plate, and standby pump switch, is installed on the connecting pipe. Simultaneously, one-way valves are installed at the outlets of both outlet pipes 1 and 2. This allows, during the chemical fluid supply process, if the main supply pump fails, the electric telescopic rod will move the connecting plate away from the connecting pipe, thereby activating the sealing plug plate 1 and the standby pump switch. The second linkage moves synchronously with the main pump, so that after the first and second sealing plugs move, the liquid outlet pipe 1 and the main supply pipe are sealed, and the liquid outlet pipe 2 is connected to the main supply pipe. At the same time, the pressure plate at one end of the linkage separates from the main pump switch, disconnecting the main supply pump circuit, while the pressure plate at the other end of the linkage contacts the standby pump switch, connecting the standby pump circuit. This allows the main supply pump to stop and the standby pump to start synchronously, avoiding interruptions in the liquid supply when switching to the standby pump after the main supply pump is damaged, and ensuring the normal supply of chemical fluids. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure provided in the embodiments of this application;

[0019] Figure 2 This is a top sectional view of the connection parts of the connecting pipe, the main liquid supply pipe, the first liquid outlet pipe, and the second liquid outlet pipe provided in the embodiments of this application;

[0020] Figure 3 This is a main sectional view of the base plate provided in the embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the connection structure of the limiting post, spring and pull plate provided in the embodiments of this application.

[0022] Explanation of reference numerals in the attached drawings: 1. Inlet pipe; 2. Main supply pump; 3. Outlet pipe one; 4. Drain pipe; 5. Connecting pipe; 6. Main supply pipe; 7. Outlet pipe two; 8. Base plate; 9. Standby pump; 10. Check valve; 11. Linkage switching mechanism; 111. Main pump switch; 112. Pressure plate; 113. Sealing plug plate one; 114. Linkage rod; 115. Sealing plug plate two; 116. Electric telescopic rod; 117. Connecting plate; 118. Standby pump switch; 12. Quick-release assembly; 121. T-shaped slider; 122. Limiting hole; 123. Limiting post; 124. Pull plate; 125. Spring; 126. T-shaped groove. Detailed Implementation

[0023] The present application will be further described in detail below with reference to the accompanying drawings.

[0024] To better understand the technical solutions presented in the embodiments of this application, the composition and working principle of the existing dual-pump liquid supply structure of the continuous liquid supply system for chemical fluids will be introduced first.

[0025] The existing dual-pump continuous liquid supply system for chemical fluids mainly consists of a base plate, a main supply pump installed on the upper part, a standby pump installed on one side of the main supply pump, a connecting pipe installed at the outlet of the main supply pump and the standby pump, and a main supply pipe installed at the outlet of the connecting pipe. During the liquid supply process, this dual-pump continuous liquid supply system for chemical fluids mainly achieves convenient switching between the main supply pump and the standby pump by installing electrically controlled valves at the outlets of the main supply pump and the standby pump respectively. In the event of failure of the main supply pump, the circuit of the main supply pump is disconnected and the circuit of the standby pump is connected, and at the same time, the corresponding electrically controlled valve is opened.

[0026] Please see Figures 1-2 This application discloses a continuous liquid supply system with a dual-pump structure, comprising a base plate 8. A main supply pump 2 is installed on one side of the top of the base plate 8, and a standby pump 9 is installed on the other side of the top of the base plate 8. The main supply pump 2 and the standby pump 9 are identical in model and structure. Both the main supply pump 2 and the standby pump 9 have inlet pipes 1 installed at their inlets. The main supply pump 2 has an outlet pipe 3 installed at its outlet, and the standby pump 9 has an outlet pipe 7 installed at its outlet. A connecting pipe 5 connects the outlets of the outlet pipes 1 and 2. A liquid supply main pipe 6 is installed at the outlet of 5. A linkage switching mechanism 11 is installed on the liquid supply main pipe 6. The linkage switching mechanism 11 includes a main pump switch 111, a pressure plate 112, a sealing plug plate 113, a linkage rod 114, a sealing plug plate 115, an electric telescopic rod 116, a connecting plate 117, and a standby pump switch 118. A one-way valve 10 for one-way drainage is installed at the outlet of both the first and second outlet pipes 3 and 7. A drain pipe 4 with a built-in valve is also installed at the bottom center of the first and second outlet pipes 3 and 7.

[0027] Specifically, when the main pump 2 fails during the chemical fluid supply process, the electric telescopic rod 116 drives the connecting plate 117 to move away from the connecting pipe 5, so that the sealing plug 113 and the sealing plug 2 115 move synchronously with the linkage rod 114. After the sealing plug 113 and the sealing plug 2 115 move, the outlet pipe 1 3 and the main supply pipe 6 are blocked, and the outlet pipe 2 7 is connected to the main supply pipe 6. At the same time, the pressure plate 112 at one end of the linkage rod 114 separates from the main pump switch 111, so that the circuit of the main pump 2 is disconnected, while the pressure plate 112 at the other end of the linkage rod 114 contacts the standby pump switch 118, so that the circuit of the standby pump 9 is connected. This realizes the synchronous stopping of the main pump 2 and the starting of the standby pump 9, avoiding the interruption of the fluid supply when switching to the standby pump 9 after the main pump 2 fails, and ensuring the normal supply of chemical fluid.

[0028] Please see Figures 1-2 The connecting pipe 5 is connected to the first liquid outlet pipe 3, the second liquid outlet pipe 7, and the main liquid supply pipe 6. The connecting pipe 5 has a sealed structure at both ends.

[0029] As one implementation method, the connection pipe 5 is connected to the liquid outlet pipe 3, the liquid outlet pipe 7 and the liquid supply main pipe 6, which can ensure that the main pump 2 or the standby pump 9 can normally deliver chemical fluid to the liquid supply main pipe 6 when in use.

[0030] Please see Figures 1-2 The linkage rod 114 passes through one end of the connecting pipe 5 and slides and seals with the connecting pipe 5. The sealing plug 113 is installed on the linkage rod 114 near the side of the liquid outlet pipe 3. The sealing plug 2 115 is installed on the linkage rod 114 near the side of the liquid outlet pipe 2 7.

[0031] In one implementation, when the main pump 2 is in normal use, sealing plug 113 is located to the left of the outlet of outlet pipe 3, and sealing plug 115 is located to the left of the outlet of outlet pipe 7. At this time, outlet pipe 3 is connected to the main supply pipe 6, while outlet pipe 7 is disconnected from the main supply pipe 6. When the main pump 2 is damaged and the standby pump 9 is switched, sealing plug 113 is located to the right of the outlet of outlet pipe 3, and sealing plug 115 is located to the right of the outlet of outlet pipe 7. At this time, outlet pipe 7 is connected to the main supply pipe 6, while outlet pipe 3 is disconnected from the main supply pipe 6.

[0032] Please see Figures 1-2 Both sealing plug 113 and sealing plug 2 115 are inserted into the linkage rod 114, and both sealing plug 113 and sealing plug 2 115 are in sliding sealing fit with the connecting pipe 5.

[0033] As one implementation method, the insertion connection method can ensure that the sealing plug plate and the second sealing plug plate 115 move and adjust synchronously with the linkage rod 114, and the sliding seal cooperation method can ensure the sealing performance of the outer periphery after the first sealing plug plate 113 and the second sealing plug plate 115 slide in the connecting pipe 5.

[0034] Please see Figures 1-2 The main pump switch 111 is installed at one end of the connecting pipe 5, and the standby pump switch 118 is installed at the other end of the connecting pipe 5. Both the main pump switch 111 and the standby switch are long-pressure open and close type switches.

[0035] In one implementation, when the main pump switch 111 is pressed, the circuit of the main pump 2 is connected, and when the external force at the main pump switch 111 is removed, the main pump switch 111 is disconnected, and the circuit of the main pump 2 is disconnected; similarly, when the standby pump switch 118 is pressed, the circuit of the standby pump 9 is connected, and when the external force at the standby pump switch 118 is removed, the standby pump switch 118 is disconnected, and the circuit of the standby pump 9 is disconnected.

[0036] Please see Figures 1-2 There are two pressure plates 112. One pressure plate 112 is installed on the linkage rod 114 near the main pump switch 111, and the other pressure plate 112 is installed on the linkage rod 114 near the standby pump switch 118.

[0037] In one implementation, the pressure plate 112 is mainly used to press the main pump switch 111 and the standby pump switch 118 to ensure the synchronous opening and closing adjustment of the liquid supply main pump 2 and the standby pump 9.

[0038] Please see Figure 1 , Figure 3 and Figure 4 A quick-release assembly 12 is installed between the main pump 2 and the base plate 8, and between the standby pump 9 and the base plate 8. The quick-release assembly 12 includes a T-shaped slider 121, a limiting hole 122, a limiting post 123, a pull plate 124, a spring 125, and a T-shaped slide groove 126.

[0039] In one implementation, the T-shaped slider 121 at the bottom of the main pump 2 and the standby pump 9 is slid into the corresponding position in the T-shaped groove 126. Then, the pull plate 124 is released, and the limiting post 123 is reset under the action of the spring 125. After the limiting post 123 is reset, it will be inserted into the limiting hole 122 in the T-shaped slider 121, thereby realizing the reliable limiting of the T-shaped slider 121 in the T-shaped groove 126.

[0040] Please see Figure 1 , Figure 3 and Figure 4The T-shaped slide 126 is formed on the base plate 8, and the main pump 2 and the standby pump 9 are both connected to the T-shaped slide 126 by corresponding T-shaped sliders 121.

[0041] As one implementation method, the T-shaped slider 121 and the T-shaped groove 126 cooperate to ensure convenient sliding installation of the main liquid supply pump 2 and the standby pump 9.

[0042] Please see Figure 1 , Figure 3 and Figure 4 The limiting hole 122 is opened on the T-shaped slider 121. One end of the spring 125 is welded to the pull plate 124, and the other end of the spring 125 is welded to the concave structure on the base plate 8. One end of the limiting post 123 is welded to the pull plate 124. The limiting post 123 passes through the spring 125, and the end of the limiting post 123 facing away from the pull plate 124 slides in conjunction with the limiting hole 122.

[0043] In one implementation, the spring 125 is mainly used to realize the automatic reset of the pull plate 124 after it is pulled outward, and the limiting post 123 mainly realizes the reliable limiting of the T-shaped slider 121 by cooperating with the limiting hole 122.

[0044] The specific working principle is as follows: First, the dual-pump liquid supply structure is installed in the operating position, and the inlet pipe 1 is connected to the external chemical fluid storage equipment. Then, simply start the main liquid supply pump 2 to allow the chemical fluid to enter the main liquid supply pipe 6 under the action of the outlet pipe 3 and the connecting pipe 5, thus realizing the liquid supply operation for the sliding fluid. During the chemical fluid supply process, if the main liquid supply pump 2 fails, the electric telescopic rod 116 drives the connecting plate 117 to move away from the connecting pipe 5, causing the sealing plug plate 113 and the sealing plug plate 115 to move synchronously with the linkage rod 114, so as to seal the plug. After the first plate 113 and the second sealing plug plate 115 move, the liquid outlet pipe 13 and the main liquid supply pipe 6 are blocked, and the liquid outlet pipe 27 and the main liquid supply pipe 6 are connected. At the same time, the pressure plate 112 at one end of the linkage rod 114 separates from the main pump switch 111, so that the circuit of the main liquid supply pump 2 is disconnected, while the pressure plate 112 at the other end of the linkage rod 114 contacts the standby pump switch 118, so that the circuit of the standby pump 9 is connected. This realizes the synchronous operation of the stop of the main liquid supply pump 2 and the start of the standby pump 9, avoiding the interruption of liquid supply when switching to the standby pump 9 after the main liquid supply pump 2 is damaged, and ensuring the normal supply of chemical fluids.

[0045] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dual pump liquid supply structure for a continuous liquid supply system, characterized by: Includes a base plate (8), on one side of the top of the base plate (8) is a main pump (2) for liquid supply, and on the other side of the top of the base plate (8) is a standby pump (9). The main pump (2) and the standby pump (9) have the same model and structure. Both the main pump (2) and the standby pump (9) have inlet pipes (1) installed at their inlets. The main pump (2) has an outlet pipe (3) installed at its outlet, and the standby pump (9) has an outlet pipe (7) installed at its outlet. The outlets of the outlet pipes (3) and (7) are connected to a connecting pipe (5). The outlet of the connecting pipe (5) is equipped with a... There is a liquid supply main pipe (6), and a linkage switching mechanism (11) is installed on the liquid supply main pipe (6). The linkage switching mechanism (11) includes a main pump switch (111), a pressure plate (112), a sealing plug plate one (113), a linkage rod (114), a sealing plug plate two (115), an electric telescopic rod (116), a connecting plate (117), and a standby pump switch (118). A one-way valve (10) for one-way drainage is installed at the outlet of the liquid outlet pipe one (3) and the liquid outlet pipe two (7). A drain pipe (4) with a valve is also installed at the middle of the bottom end of the liquid outlet pipe one (3) and the liquid outlet pipe two (7).

2. The dual-pump liquid supply structure for a continuous liquid supply system according to claim 1, characterized in that: The connecting pipe (5) is connected to the first liquid outlet pipe (3), the second liquid outlet pipe (7) and the main liquid supply pipe (6), and the connecting pipe (5) has a sealed structure at both ends.

3. The dual pump liquid supply structure of a continuous liquid supply system according to claim 2, characterized in that: The linkage rod (114) passes through one end of the connecting pipe (5) and is in sliding sealing cooperation with the connecting pipe (5). The sealing plug plate (113) is installed on the linkage rod (114) near the liquid outlet pipe (3). The sealing plug plate (115) is installed on the linkage rod (114) near the liquid outlet pipe (7).

4. The dual pump liquid supply structure of a continuous liquid supply system according to claim 3, wherein: Both the first sealing plug (113) and the second sealing plug (115) are inserted into the linkage rod (114), and both the first sealing plug (113) and the second sealing plug (115) are in sliding sealing cooperation with the connecting pipe (5).

5. The dual pump liquid supply structure of a continuous liquid supply system according to claim 1, wherein: The main pump switch (111) is installed at one end of the connecting pipe (5), and the standby pump switch (118) is installed at the other end of the connecting pipe (5). Both the main pump switch (111) and the standby pump switch (118) are long-pressure open-close disconnect switches.

6. The dual pump liquid supply structure of a continuous liquid supply system according to claim 5, wherein: There are two pressure plates (112). One pressure plate (112) is installed on the linkage rod (114) near the end of the main pump switch (111), and the other pressure plate (112) is installed on the linkage rod (114) near the end of the standby pump switch (118).

7. The dual pump liquid supply structure of a continuous liquid supply system according to claim 1, wherein: A quick-installation assembly (12) is installed between the main pump (2) and the base plate (8) and between the standby pump (9) and the base plate (8). The quick-installation assembly (12) includes a T-shaped slider (121), a limiting hole (122), a limiting post (123), a pull plate (124), a spring (125), and a T-shaped groove (126).

8. The dual-pump liquid supply structure of a continuous liquid supply system according to claim 7, characterized in that: The T-shaped slide (126) is formed on the base plate (8), and the main pump (2) and the standby pump (9) cooperate with the T-shaped slide (126) through the corresponding T-shaped slider (121).

9. The dual pump liquid supply structure of a continuous liquid supply system according to claim 7, wherein: The limiting hole (122) is opened on the T-shaped slider (121). One end of the spring (125) is welded to the pull plate (124), and the other end of the spring (125) is welded to the concave structure on the base plate (8). One end of the limiting post (123) is welded to the pull plate (124), and the limiting post (123) passes through the spring (125). The end of the limiting post (123) facing away from the pull plate (124) slides in cooperation with the limiting hole (122).

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