Burette connector

Abstract

The utility model relates to the technical field of aquarium equipment, and particularly discloses a burette connector which comprises a connecting pipe group and a liquid adding assembly, the connecting pipe group is provided with a main flow channel, and the connecting pipe group is fixedly connected with a water outlet pipeline of a fish tank filtering system, so that the main flow channel is connected with the water outlet pipeline in series; the liquid adding assembly comprises a liquid adding channel, the liquid adding assembly is fixedly arranged on the peripheral wall of the connecting pipe set, one end of the liquid adding channel is communicated with the main flow channel, and the liquid adding assembly is used for being fixedly connected with a liquid outlet pipeline of the metering pump so that the other end of the liquid adding channel can be communicated with the liquid outlet pipeline. The burette connector solves the problems that an output pipeline of a constant delivery pump is directly connected with a tank wall of a fish tank in a hanging manner, the fixation is not firm, and the output pipeline of the constant delivery pump is very easy to be separated from the constraint of the tank wall. The stability of the water body can be effectively ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of aquarium equipment, in particular to a titration pipeline connector. Background Art

[0002] In addition to obtaining a certain amount of nutritional supplements from the aquatic plant mud, as the number of water changes accumulates and the aquatic plants absorb and transform nutrients, various nutrients need to be supplemented in a timely manner in the middle and late stages to keep the water body relatively stable in various elements, so as to ensure the normal growth of the aquatic plants in the fish tank.

[0003] In the prior art, in order to maintain the relative stability of the water body in the fish tank, a titration system is usually set up, including a liquid storage box and a metering pump. Various different elements are arranged in the liquid storage box and are delivered to the fish tank regularly and quantitatively through the metering pump, so as to maintain the relative stability of the water body. In this process, the output pipeline of the metering pump is directly connected to the wall of the fish tank, so that the output pipeline is arranged outside the fish tank. This setting has the problem of unreliable fixation. The output pipeline of the metering pump is very easy to break away from the restraint of the tank wall, resulting in the problem that the required elements in the fish tank cannot be supplemented in a timely manner, causing the instability of the water body. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a titration pipeline connector to solve the problem in the related technology that the output pipeline of the metering pump is directly connected to the wall of the fish tank, resulting in unreliable fixation and the output pipeline of the metering pump being very easy to break away from the restraint of the tank wall.

[0005] The utility model provides a titration pipeline connector, which includes:

[0006] A connecting pipe group, the connecting pipe group is provided with a main flow channel, and the connecting pipe group is fixedly connected to the water outlet pipeline of the fish tank filtration system, so that the main flow channel is connected in series to the water outlet pipeline;

[0007] A liquid adding component, the liquid adding component includes a liquid adding channel, the liquid adding component is fixedly arranged on the peripheral wall of the connecting pipe group and makes one end of the liquid adding channel communicate with the main flow channel, and the liquid adding component is used for being fixedly connected to the liquid outlet pipeline of the metering pump, so that the other end of the liquid adding channel communicates with the liquid outlet pipeline.

[0008] As a preferred technical solution of the titration pipeline connector, the connecting pipe group includes a pipe body and two first tower heads arranged at both ends of the pipe body, and the main flow channel penetrates through the pipe body and the two first tower heads;

[0009] The water outlet pipeline includes a first pipe and a second pipe, and the first pipe and the second pipe are respectively press-fitted on the two first tower heads.

[0010] As a preferred technical solution of the titration pipeline connector, the connecting pipe group includes a pipe body, a refinement head, and two first bell-shaped connectors. One end of the pipe body is connected to the first bell-shaped connector, and both ends of the refinement head are respectively connected to the other end of the pipe body and the other first bell-shaped connector. The main flow channel penetrates through the pipe body, the refinement head, and the two first bell-shaped connectors. An air inlet pipe is arranged on the peripheral wall of the refinement head. The air inlet pipe is communicated with the main flow channel, and a first one-way valve is arranged in the air inlet pipe. The first one-way valve allows the gas in the air inlet pipe to flow into the main flow channel.

[0011] The water outlet pipeline includes a first pipe and a second pipe. The first pipe and the second pipe are respectively press-fitted on the two first bell-shaped connectors.

[0012] As a preferred technical solution of the titration pipeline connector, the connecting pipe group further includes two fastening nuts. The two fastening nuts are respectively screwed to the corresponding two first bell-shaped connectors. The two fastening nuts and the corresponding two first bell-shaped connectors are used to clamp the corresponding first pipe and the second pipe.

[0013] As a preferred technical solution of the titration pipeline connector, a plurality of first protrusions are convexly arranged on the outer peripheral wall of the fastening nut at intervals around the axial direction of the fastening nut. The plurality of first protrusions extend along the axial direction of the fastening nut.

[0014] As a preferred technical solution of the titration pipeline connector, through holes corresponding to the liquid adding assembly are arranged on the peripheral wall of the connecting pipe group;

[0015] The liquid adding assembly includes a second bell-shaped connector and a fastening sleeve. The liquid adding channel is arranged in the second bell-shaped connector. The second bell-shaped connector is fixedly connected to the peripheral wall of the connecting pipe group to communicate the liquid adding channel with the through hole. The second bell-shaped connector is used to be press-fitted into the liquid outlet pipeline. The fastening sleeve is screwed to the second bell-shaped connector. The fastening sleeve and the second bell-shaped connector are used to clamp the liquid outlet pipeline sleeved on the second bell-shaped connector.

[0016] As a preferred technical solution of the titration pipeline connector, through holes corresponding to the liquid adding assembly are arranged on the peripheral wall of the connecting pipe group;

[0017] The liquid adding assembly includes a second bell-shaped connector and a fastening sleeve. The liquid adding channel is arranged in the second bell-shaped connector. The fastening sleeve is fixedly connected to the peripheral wall of the connecting pipe group. The second bell-shaped connector is used to be press-fitted into the liquid outlet pipeline. The second bell-shaped connector is inserted into the fastening sleeve and screwed to the fastening sleeve to communicate the liquid adding channel with the through hole. The fastening sleeve and the second bell-shaped connector are used to clamp the liquid outlet pipeline sleeved on the second bell-shaped connector.

[0018] As a preferred technical solution of the titration pipeline connector, a plurality of second protrusions are convexly provided at intervals along the axial direction of the tightening sleeve on the outer peripheral wall of the tightening sleeve, and the plurality of second protrusions extend along the axial direction of the tightening sleeve.

[0019] As a preferred technical solution of the titration pipeline connector, the liquid adding assembly further includes a second one-way valve, and the second one-way valve allows the liquid in the liquid outlet pipeline to flow into the main flow channel.

[0020] As a preferred technical solution of the titration pipeline connector, a convex ring is convexly provided on the inner wall of the liquid adding channel around the circumferential direction of the liquid adding channel;

[0021] The second one-way valve includes a spring and a valve core. The valve core and the spring are arranged in the liquid adding channel along the axis of the liquid adding channel and are located on the side of the convex ring close to the connecting pipe group. The spring has a tendency to drive the valve core to abut against the convex ring, and the valve core is in clearance fit with the liquid adding channel.

[0022] The beneficial effects of the present utility model are as follows:

[0023] The present utility model provides a titration pipeline connector, which includes a connecting pipe group and a liquid adding assembly. The connecting pipe group is provided with a main flow channel. The connecting pipe group is fixedly connected to the water outlet pipeline of the fish tank filtration system so that the main flow channel is connected in series to the water outlet pipeline. The liquid adding assembly includes a liquid adding channel. The liquid adding assembly is fixedly arranged on the peripheral wall of the connecting pipe group and one end of the liquid adding channel is communicated with the main flow channel. The liquid adding assembly is used for being fixedly connected to the liquid outlet pipeline of the metering pump so that the other end of the liquid adding channel is communicated with the liquid outlet pipeline. This device first fixedly connects the connecting pipe group to the water outlet pipeline of the fish tank filtration system. On the one hand, it realizes the fixation of the titration pipeline connector. On the other hand, it allows the filtered water in the water outlet pipeline to flow through the main flow channel. The liquid adding assembly is used for being fixedly connected to the liquid outlet pipeline of the metering pump. Since the liquid adding assembly is fixedly connected to the connecting pipe group, the liquid outlet end of the liquid outlet pipeline is fixed to the water outlet pipeline. Since the liquid adding assembly connects the liquid storage pipeline to the main flow channel, the metering pump can pump the lacking liquid medicine in the fish tank into the main flow channel through the liquid outlet pipeline. Then, the liquid medicine and the filtered water can be mixed in the main flow channel and flow into the fish tank. This setting solves the problem that the output pipeline of the metering pump is directly hung on the tank wall of the fish tank, resulting in insecure fixation and the output pipeline of the metering pump being easily separated from the restraint of the tank wall. It can effectively ensure the stability of the water body. Description of the Drawings

[0024] Figure 1 Structural schematic diagram of the titration pipeline connector in the first embodiment of the present utility model Figure 1 ;

[0025] Figure 2 Structural schematic diagram of the titration pipeline connector in the first embodiment of the present utility model Figure 2 ;

[0026] Figure 3 is Figure 2 the sectional view taken along A-A in

[0027] Figure 4 is Figure 3 the enlarged partial view at A in

[0028] Figure 5 the structural schematic diagram of the titration pipeline connector in the second embodiment of the present utility model;

[0029] Figure 6 is Figure 5 the sectional view taken along B-B in

[0030] Figure 7 the structural schematic diagram of the titration pipeline connector in the third embodiment of the present utility model.

[0031] In the figure:

[0032] 1. Connection pipe group; 11. Pipe body; 111. Through hole; 12. First bell head; 13. Tightening nut; 131. First protrusion; 14. Main flow channel; 15. Refinement head; 151. Air inlet pipe;

[0033] 2. Liquid adding assembly; 21. Second bell head; 211. Liquid adding channel; 2111. Convex ring; 22. Tightening sleeve; 221. Second protrusion; 23. Second one-way valve; 231. Spring; 232. Valve core. Specific embodiments

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0038] Embodiment 1

[0039] As Figures 1 to 4As shown in the figure, this embodiment provides a titration pipeline connector, which includes a connecting pipe group 1 and a liquid adding component 2. The connecting pipe group 1 is provided with a main flow channel 14. The connecting pipe group 1 is fixedly connected to the water outlet pipeline of the fish tank filtration system so that the main flow channel 14 is connected in series with the water outlet pipeline. The liquid adding component 2 includes a liquid adding channel 211. The liquid adding component 2 is fixedly arranged on the peripheral wall of the connecting pipe group 1 and one end of the liquid adding channel 211 is communicated with the main flow channel 14. The liquid adding component 2 is used for being fixedly connected to the liquid outlet pipeline of the metering pump so that the other end of the liquid adding channel 211 is communicated with the liquid outlet pipeline. This device first fixedly connects the connecting pipe group 1 to the water outlet pipeline of the fish tank filtration system. On the one hand, it realizes the fixation of the titration pipeline connector. On the other hand, it allows the filtered water in the water outlet pipeline to flow through the main flow channel 14. The liquid adding component 2 is used for being fixedly connected to the liquid outlet pipeline of the metering pump. Since the liquid adding component 2 is fixedly connected to the connecting pipe group 1, the liquid outlet end of the liquid outlet pipeline is fixed on the water outlet pipeline. Since the liquid adding component 2 connects the liquid storage pipeline and the main flow channel 14, the metering pump can pump the lacking liquid medicine in the fish tank into the main flow channel 14 through the liquid outlet pipeline. Then, the liquid medicine and the filtered water can be mixed in the main flow channel 14 and then flow into the fish tank. This setting solves the problem that the output pipeline of the metering pump is directly connected to the wall of the fish tank, resulting in unreliable fixation and the output pipeline of the metering pump being extremely easy to break away from the restraint of the tank wall. It can effectively ensure the stability of the water body.

[0040] Optionally, the connecting pipe group 1 includes a pipe body 11 and two first bell mouths 12 arranged at both ends of the pipe body 11. The main flow channel 14 penetrates through the pipe body 11 and the two first bell mouths 12. The water outlet pipeline includes a first pipe and a second pipe. The first pipe and the second pipe are respectively press-fitted on the two first bell mouths 12. In this embodiment, compared with directly sleeving the first pipe and the second pipe on the pipe body 11, the first bell mouth 12 can reduce the difficulty for the user to respectively sleeve the first pipe and the second pipe on the first bell mouth 12, and at the same time, it can also ensure the interference fit between the two first bell mouths 12 and the first pipe and the second pipe respectively. For the specific structure of the first bell mouth 12, it is prior art and will not be elaborated here.

[0041] Optionally, the pipe body 11 and the two first bell mouths 12 arranged at both ends of the pipe body 11 are threadedly connected. In other embodiments, the pipe body 11 and the two first bell mouths 12 arranged at both ends of the pipe body 11 are fixedly connected.

[0042] Optionally, the connecting pipe group 1 further includes two tightening nuts 13, and the two tightening nuts 13 are respectively screwed to the corresponding two first tower heads 12. The two tightening nuts 13 and the corresponding two first tower heads 12 are used to clamp the corresponding first pipe and second pipe. In this embodiment, a threaded portion is provided on the side of the first tower head 12 close to the pipe body 11. When installing the tightening nut 13, first, before the first pipe and the second pipe are respectively sleeved on the first tower head 12, the two tightening nuts 13 are respectively sleeved on the first pipe and the second pipe, and then the first pipe and the second pipe are respectively sleeved on the corresponding first tower heads 12. At this time, the radial dimensions of the first pipe and the second pipe become larger. Then, the two tightening nuts 13 are pushed to make the two tightening nuts 13 respectively screwed to the two threaded portions on the two first tower heads 12, thereby realizing that the two tightening nuts 13 and the corresponding two first tower heads 12 are used to clamp the corresponding first pipe and second pipe. This setting improves the fixing firmness and sealing performance of the first pipe and the second pipe with the two first tower heads 12 respectively.

[0043] Optionally, a plurality of first protrusions 131 are convexly provided on the outer peripheral wall of the tightening nut 13 at intervals along the axial direction of the tightening nut 13, and the plurality of first protrusions 131 extend along the axial direction of the tightening nut 13. In this embodiment, when holding the tightening nut 13 by hand, the plurality of first protrusions 131 can prevent slipping between the hand and the tightening nut 13, thereby facilitating the screwing of the tightening nut 13 by hand, facilitating installation, and improving the installation convenience and efficiency.

[0044] Optionally, a through hole 111 corresponding to the liquid adding assembly 2 is provided on the peripheral wall of the connecting pipe group 1; the liquid adding assembly 2 includes a second tower head 21 and a tightening sleeve 22. A liquid adding channel 211 is provided in the second tower head 21. The second tower head 21 is fixedly connected to the peripheral wall of the connecting pipe group 1 to communicate the liquid adding channel 211 with the through hole 111. The second tower head 21 is used for press-fitting and inserting into the liquid outlet pipeline. The tightening sleeve 22 is screwed to the second tower head 21, and the tightening sleeve 22 and the second tower head 21 are used to clamp the liquid outlet pipeline sleeved on the second tower head 21. In this embodiment, a threaded portion is provided on the side of the second tower head 21 close to the connecting pipe group 1. When fixedly installing the liquid outlet pipeline on the liquid adding assembly 2, first, the tightening sleeve 22 is sleeved on the liquid adding pipeline, and then the heating pipe group is sleeved on the second tower head 21. At this time, the outer diameter of the liquid outlet pipeline located outside the second tower head 21 becomes larger. The tightening sleeve 22 is screwed, so that the tightening sleeve 22 is screwed to the second tower head 21, thereby realizing that the tightening sleeve 22 is press-fitted and sleeved on the liquid outlet pipeline. This setting not only realizes the communication between the liquid outlet pipeline and the liquid adding channel 211, but also realizes the fixation of the liquid outlet pipeline and the liquid adding assembly 2.

[0045] Optionally, a plurality of second protrusions 221 are axially spaced and protrude from the outer peripheral wall of the tightening sleeve 22, and the plurality of second protrusions 221 extend along the axis of the tightening sleeve 22. In this embodiment, when the tightening nut 13 is held by hand, the plurality of second protrusions 221 can prevent slipping between the hand and the tightening sleeve 22, thereby facilitating the rotation of the tightening sleeve 22 by hand, facilitating installation, and improving the convenience and efficiency of installation.

[0046] Optionally, the liquid adding assembly 2 further includes a second one-way valve 23, and the second one-way valve 23 allows the liquid in the liquid outlet pipeline to flow into the main flow channel 14. In this embodiment, this setting can prevent the liquid in the main flow channel 14 from flowing back.

[0047] Optionally, a convex ring 2111 is circumferentially protruded from the inner wall of the liquid adding channel 211 around the liquid adding channel 211; the second one-way valve 23 includes a spring 231 and a valve core 232. The valve core 232 and the spring 231 are arranged along the axis of the liquid adding channel 211 in the liquid adding channel 211 and are located on the side of the convex ring 2111 close to the connecting pipe group 1. The spring 231 has a tendency to drive the valve core 232 to abut against the convex ring 2111, and the valve core 232 is in clearance fit with the liquid adding channel 211. In this embodiment, the valve core 232 is a cylinder, and the diameter of the valve core 232 is larger than the inner diameter of the convex ring 2111. When the spring 231 drives the valve core 232 to abut against the convex ring 2111, the valve core 232 closes the inner hole of the convex ring 2111, and this setting can prevent the liquid in the main flow channel 14 from flowing into the liquid outlet pipeline. When the metering pump works, the liquid in the liquid outlet pipeline increases. At this time, the liquid in the liquid outlet pipeline overcomes the elastic force of the spring 231, so that the valve core 232 and the convex ring 2111 are spaced apart. Also, because the valve core 232 is in clearance fit with the liquid adding channel 211, the liquid in the liquid outlet pipeline can flow into the main flow channel 14 through the gap between the valve core 232 and the convex ring 2111 and the gap between the valve core 232 and the liquid adding channel 211.

[0048] Optionally, a limiting protrusion is further arranged in the liquid adding channel 211, the limiting protrusion is located at one end of the spring 231 away from the valve core 232, one end of the spring 231 abuts against the valve core 232, and the other end of the spring 231 abuts against the limiting protrusion.

[0049] Optionally, the valve core 232 is made of a rubber part, and this setting can enhance the sealing performance of the valve core 232 to the inner hole of the convex ring 2111.

[0050] Optionally, a plurality of liquid adding assemblies 2 are provided, and the plurality of liquid adding assemblies 2 are axially spaced along the axis of the main flow channel 14. In this embodiment, since the elements required in the fish tank usually include multiple types, the above setting enables the titration pipeline connector to connect multiple liquid outlet pipelines simultaneously.

[0051] Embodiment Two

[0052] Such as Figure 5 And6 As shown, this embodiment is basically the same as the first embodiment, and the only difference lies in the structure of the liquid adding component 2. Optionally, the liquid adding component 2 includes a second pagoda head 21 and a tight sleeve 22, the liquid adding passage 211 is arranged on the second pagoda head 21, the tight sleeve 22 is fixedly connected to the peripheral wall of the connecting pipe group 1, the second pagoda head 21 is used for interference insertion in the liquid outlet pipeline, the second pagoda head 21 is inserted in the tight sleeve 22 and is screwed with the tight sleeve 22 to connect the liquid adding passage 211 with the through hole 111, and the tight sleeve 22 and the second pagoda head 21 are used to clamp the liquid outlet pipeline sleeved on the second pagoda head 21. In this embodiment, the liquid outlet pipeline interference sleeve is arranged at one end of the second pagoda head 21, and the other end of the second pagoda head 21 is provided with an external thread. The tight sleeve 22 is fixedly arranged on the outer peripheral wall of the connecting pipe group 1, and the tight sleeve 22 is provided with an internal thread. The other end of the second pagoda head 21 is screwed into the tight sleeve 22, so that the liquid outlet pipeline enters into the tight sleeve 22 along with the second pagoda head 21, and finally the second pagoda head 21 and the tight sleeve 22 clamp the liquid outlet pipeline.

[0053] Embodiment 3

[0054] like Figure 7 As shown, this embodiment is basically the same as the first embodiment or the second embodiment, the only difference is that the connecting pipe group 1 also includes a thinning head 15, one end of the tube body 11 is connected to the first pagoda head 12, and the two ends of the thinning head 15 are respectively connected to the other end of the tube body 11 and the other first pagoda head 12, and the main channel 14 runs through the tube body 11, the thinning head 15 and the two first pagoda heads 12; the surrounding wall of the thinning head 15 is provided with a gas filling pipe 151, the gas filling pipe 151 is connected to the main channel 14, and a first one-way valve is provided in the gas filling pipe 151, and the first one-way valve allows the gas in the gas filling pipe 151 to flow to the main channel 14; the water outlet pipeline includes a first pipe and a second pipe, and the first pipe and the second pipe are respectively interference-fitted on the two first pagoda heads 12. In this embodiment, the gas filling pipe 151 is connected to the gas outlet end of the gas filling system. Since the first one-way valve allows the gas in the gas filling pipe 151 to flow to the main channel 14, the gas in the gas filling system can enter the main channel 14 through the gas filling pipe 151, thereby allowing the gas to be better mixed with the filtered water in the main channel 14.

[0055] Optionally, the atomizing head 15 is further provided with a atomizing member, which can atomize the gas in the air inlet pipe 151 into small bubbles before entering the main channel 14. This arrangement further improves the uniformity of mixing of the gas and the filtered water.

[0056] Specifically, the gas emitted from the outlet end of the gas adding system can be carbon dioxide or oxygen. When there are water plants planted in the fish tank, the gas emitted from the outlet end of the gas adding system is carbon dioxide. At this time, the carbon dioxide is used for the photosynthesis of the water plants, and the oxygen generated by the photosynthesis of the water plants can also be used for the respiration of the aquatic animals in the fish tank. When only aquatic animals are cultured in the fish tank, the gas emitted from the outlet end of the gas adding system is oxygen for the respiration of the aquatic animals in the fish tank.

[0057] Specifically, one end of the pipe body 11 is screwed to the first tower head 12, one end of the refinement head 15 is screwed to the other end of the pipe body 11, and the other end of the refinement head 15 is screwed to another first tower head 12.

[0058] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Titration line connector, characterized in that: include: A connecting pipe group (1), the connecting pipe group (1) being provided with a main flow channel (14), the connecting pipe group (1) being fixedly connected to a water outlet pipeline of a fish tank filtration system so that the main flow channel (14) is connected in series to the water outlet pipeline; A liquid adding component (2), the liquid adding component (2) comprising a liquid adding channel (211), the liquid adding component (2) being fixedly arranged on the peripheral wall of the connecting pipe assembly (1) so that one end of the liquid adding channel (211) is in communication with the main channel (14), and the liquid adding component (2) is used for being fixedly connected to the liquid outlet pipeline of the metering pump so that the other end of the liquid adding channel (211) is in communication with the liquid outlet pipeline.

2. The titration line connector according to claim 1, characterized in that: The connecting pipe set (1) comprises a pipe body (11) and two first pagoda heads (12) arranged at two ends of the pipe body (11), and the main flow channel (14) runs through the pipe body (11) and the two first pagoda heads (12); The water outlet pipeline comprises a first pipe and a second pipe, and the first pipe and the second pipe are respectively interference-fitted on the two first pagoda heads (12).

3. The titration line connector according to claim 1, characterized in that: The connecting pipe group (1) comprises a pipe body (11), a thinning head (15) and two first pagoda heads (12); one end of the pipe body (11) is connected to the first pagoda head (12); two ends of the thinning head (15) are respectively connected to the other end of the pipe body (11) and another first pagoda head (12); the main flow channel (14) passes through the pipe body (11), the thinning head (15) and the two first pagoda heads (12); a gas filling pipe (151) is arranged on the peripheral wall of the thinning head (15); the gas filling pipe (151) is communicated with the main flow channel (14); a first one-way valve is arranged in the gas filling pipe (151); the first one-way valve allows the gas in the gas filling pipe (151) to flow to the main flow channel (14); The water outlet pipeline comprises a first pipe and a second pipe, and the first pipe and the second pipe are respectively interference-fitted on the two first pagoda heads (12).

4. The titration line connector according to claim 2 or 3, characterized in that: The connecting pipe set (1) further comprises two clamping nuts (13), wherein the two clamping nuts (13) are respectively screwed to the corresponding two first pagoda heads (12), and the two clamping nuts (13) and the corresponding two first pagoda heads (12) are used to clamp the corresponding first pipe and the second pipe.

5. The titration line connector according to claim 4, characterized in that: A plurality of first protrusions (131) are protruded from the outer peripheral wall of the clamping nut (13) at intervals around the axial direction of the clamping nut (13), and the plurality of first protrusions (131) extend along the axial direction of the clamping nut (13).

6. The titration line connector according to claim 1, characterized in that: A through hole (111) corresponding to the liquid adding assembly (2) is provided on the peripheral wall of the connecting pipe assembly (1); The liquid adding assembly (2) comprises a second pagoda head (21) and a tightening sleeve (22); the liquid adding passage (211) is arranged on the second pagoda head (21); the second pagoda head (21) is fixedly connected to the peripheral wall of the connecting pipe assembly (1) so as to connect the liquid adding passage (211) with the through hole (111); the second pagoda head (21) is used for interference insertion in the liquid outlet pipeline; the tightening sleeve (22) is screwed to the second pagoda head (21); the tightening sleeve (22) and the second pagoda head (21) are used for clamping the liquid outlet pipeline sleeved on the second pagoda head (21).

7. The titration line connector according to claim 1, characterized in that: A through hole (111) corresponding to the liquid adding component (2) is provided on the peripheral wall of the connecting pipe group (1); The liquid adding assembly (2) comprises a second pagoda head (21) and a tight ring sleeve (22); the liquid adding passage (211) is arranged on the second pagoda head (21); the tight ring sleeve (22) is fixedly connected to the peripheral wall of the connecting pipe assembly (1); the second pagoda head (21) is used for interference insertion in the liquid outlet pipeline; the second pagoda head (21) is inserted into the tight ring sleeve (22) and is screwed to the tight ring sleeve (22) to connect the liquid adding passage (211) with the through hole (111); the tight ring sleeve (22) and the second pagoda head (21) are used for clamping the liquid outlet pipeline sleeved on the second pagoda head (21).

8. The titration line connector according to claim 6 or 7, characterized in that: A plurality of second protrusions (221) are protruded from the outer peripheral wall of the tight hoop (22) at intervals around the axial direction of the tight hoop (22), and the plurality of second protrusions (221) extend along the axial direction of the tight hoop (22).

9. The titration line connector according to claim 1, characterized in that: The liquid adding assembly (2) further comprises a second one-way valve (23), wherein the second one-way valve (23) allows the liquid in the liquid outlet pipeline to flow toward the main flow channel (14).

10. The titration line connector according to claim 9, characterized in that: The inner wall of the liquid adding channel (211) is provided with a convex ring (2111) convexly around the circumference of the liquid adding channel (211); The second one-way valve (23) comprises a spring (231) and a valve core (232); the valve core (232) and the spring (231) are arranged on the liquid adding passage (211) along the axis of the liquid adding passage (211) and are located on a side of the convex ring (2111) close to the connecting pipe assembly (1); the spring (231) has a movement tendency to drive the valve core (232) to press against the convex ring (2111); and the valve core (232) and the liquid adding passage (211) are in clearance fit.

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