A balance box and pipeline machine

Abstract

The present invention discloses a balancing box and a pipeline machine. The balancing box includes: a balancing box body provided with a second outlet pipe, and a guide limit assembly located inside the balancing box body, the guide limit assembly including a storage space connected to the interior of the balancing box body, the storage space connected to the second outlet pipe, and a limit protrusion provided on the side of the second outlet pipe facing the storage space; a float movably arranged in the storage space, the float including a float body and a mounting portion fixedly connected to the float body, a cavity formed between the float body and the mounting portion, a mounting hole formed inside the mounting portion, and a groove provided at one end of the float body near the mounting hole; and a sealing member movably arranged in the storage space and located between the float and the second outlet pipe. The present invention optimizes the structure of the balancing box and its installation method in the pipeline machine, thereby achieving the effects of no dripping during use and long-term water discharge without water explosion.

Description

Technical Field

[0001] The present invention relates to the technical field of drinking water equipment, and in particular to a balancing box and a pipeline machine. Background Art

[0002] Currently, heat storage pipeline machines utilizing the Venturi effect are widely used on the market due to their low cost and simple design. These pipeline machines generally utilize a balancing tank structure, which plays a crucial role in their operation. On the one hand, the balancing tank must quickly connect to the hot water tank at the end of water withdrawal, causing the liquid level at the spout to drop, effectively preventing dripping and leakage. On the other hand, the balancing tank must also balance the pressure within the equipment to avoid damage caused by pressure imbalance and ensure safe use. At the same time, when the pipeline machine is discharging water, the balancing tank must be able to disconnect from the hot water tank promptly to prevent air from entering the internal pipes. Failure to do so could result in poor water flow, water explosions, and in severe cases, even safety hazards such as burns. Therefore, timely opening and effective sealing of the balancing tank are crucial to the proper operation of Venturi-effect heat storage pipeline machines.

[0003] However, the current sealing solutions for the balance boxes of these pipeline machines mostly use a combination of small plastic balls and a rubber sealing ring inside the balance box. During the water intake process, negative pressure is generated at the balance box outlet, attracting the balls to the sealing ring. However, due to the relatively small negative pressure and limitations in processing precision, this combination often cannot achieve a complete seal. To compensate for this shortcoming, a portion of water must remain above the contact surface inside the balance box after the two come into contact to prevent air from entering. However, this solution has the following drawbacks:

[0004] First, the plastic balls are small, and their ability to sink only a limited distance below the water surface when floating means that after contacting the sealing ring, very little water remains inside the tank. Once this water is sucked into the hot water tank through the tiny gap, the sealing effect is lost. This is also the main reason why pipeline water heaters often experience sudden water explosions after a period of water discharge.

[0005] Secondly, the sealing ring is small and needs to be pressed into the bottom of the balance box from inside to secure it, a process that often requires tools, making installation difficult. Furthermore, after installation, the small hole in the center of the sealing ring is easily squeezed and deformed, further affecting the clearance between the ring and the ball, thereby reducing the sealing effect. Summary of the Invention

[0006] To address the aforementioned issues, the present invention provides a balancing tank and pipeline machine. The present invention optimizes the balancing tank's structure and its installation within the pipeline machine, aiming to achieve drip-free operation and long-term water flow without blasting. Furthermore, by adjusting the size and height of the float, the amount of water remaining inside the balancing tank during sealing can be controlled. This prevents insufficient residual water from impacting the sealing effect, while also preventing excessive water from causing the liquid level at the spout to drop insufficiently after water withdrawal, thereby causing dripping and leakage.

[0007] In a first aspect, the present invention provides a balancing box, comprising:

[0008] The balance box body is provided with a second outlet pipe and a guide and limit assembly located inside the balance box body. The guide and limit assembly includes a receiving space communicating with the interior of the balance box body. The receiving space is communicated with the second outlet pipe. A limiting protrusion is provided on a side of the second outlet pipe facing the receiving space.

[0009] a float movably disposed in the accommodating space, the float comprising a float body and a mounting portion fixedly connected to the float body, a cavity being formed between the float body and the mounting portion, a mounting hole being formed inside the mounting portion, and a groove being provided at one end of the float body adjacent to the mounting hole;

[0010] A sealing member is movably arranged in the accommodating space and is located between the float and the second outlet pipe. The sealing member includes a mounting post and a sealing boss fixedly connected to one side of the mounting post. A sealing protrusion is fixedly connected to a side of the sealing boss away from the mounting post. The mounting post is installed in the mounting hole. Part of the sealing protrusion is located in the groove and abuts against the float body. The side of the sealing protrusion facing the sealing protrusion is used to abut against the limiting protrusion, and the sealing protrusion cooperates with the second outlet pipe. When the sealing protrusion abuts against the limiting protrusion, the sealing protrusion extends into the second outlet pipe to seal the second outlet pipe.

[0011] In one embodiment of the present invention, a cover plate is further included on the balance box body, and the cover plate is provided with a first outlet pipe communicating with the interior of the balance box body, and the first outlet pipe is communicated with the outside.

[0012] In one embodiment of the present invention, the interior of the balance box body includes a first space and a second space that are interconnected; the guide and limit assembly includes a first guide and limit assembly and a second guide and limit assembly; the first guide and limit assembly is fixedly connected to the cover plate and is located in the first space, and the second guide and limit assembly is fixedly connected to the balance box body and is located in the second space; the first guide and limit assembly includes a first accommodating space, and the second guide and limit assembly includes a second accommodating space, and the first accommodating space, the second accommodating space, and the second outlet pipe are connected in sequence.

[0013] In one embodiment of the present invention, the first guide and limit assembly includes a plurality of first arc-shaped plates arranged in a ring shape, a first gap is formed between adjacent first arc-shaped plates, a plurality of first arc-shaped plates are combined to form a first accommodating space, and a first reinforcing plate is fixedly connected between the first arc-shaped plate and the cover plate; the second guide and limit assembly includes a plurality of second arc-shaped plates arranged in a ring shape, a second gap is formed between adjacent second arc-shaped plates, a plurality of second arc-shaped plates are combined to form a second accommodating space, and a second reinforcing plate is fixedly connected between the second arc-shaped plate and the balance box body.

[0014] In one embodiment of the present invention, the first accommodating space, the second accommodating space, and the second outlet pipe are coaxial.

[0015] In one embodiment of the present invention, the sealing protrusion is a hemispherical structure, and the sealing protrusion with the hemispherical structure can extend into the second outlet pipe to seal it.

[0016] In one embodiment of the present invention, the mounting post of the sealing member extends into the mounting hole of the float and is interference fit with the mounting hole.

[0017] In a second aspect, the present invention provides a pipeline machine, comprising a balance tank as described above, the pipeline machine also comprising a pipeline machine body, and a hot water tank, a first pipeline, a Venturi tee, a second pipeline and a third pipeline installed in the pipeline machine body; the first pipeline, the second pipeline and the third pipeline are respectively connected to the three openings of the Venturi tee; the first pipeline is connected to the external water supply, the third pipeline is connected to the second outlet pipe of the balance tank, the second pipeline is connected to the bottom of the hot water tank, and the top of the hot water tank is connected to a water outlet pipe, through which the hot water in the hot water tank flows out.

[0018] In one embodiment of the present invention, the first space and the second space of the balancing tank form an L-shaped structure, the first space of the balancing tank is located above the hot water tank, and the second space of the balancing tank is lower than the top surface of the hot water tank.

[0019] In one embodiment of the present invention, a baffle is provided at the connection between the second pipeline and the bottom of the hot water tank.

[0020] Beneficial effects of the present invention:

[0021] The present invention provides a balancing tank and pipeline machine, wherein a first pipeline is used to receive cold water. The cold water flows sequentially through the first pipeline, a Venturi tee, and a second pipeline into the bottom of a hot water tank, pushing the hot water in the hot water tank out through the outlet pipe. Due to the different temperatures and densities of the cold water upon entering the hot water tank, the cold water will settle at the bottom of the hot water tank, pushing the hot water out. Simultaneously, a baffle is provided at the cold water inlet of the hot water tank, specifically at the connection between the second pipeline and the bottom of the hot water tank, to prevent the cold water from flowing directly upward upon entering and causing thermal convection. Furthermore, if the balancing tank is not sealed properly as the cold water enters, cold water mixed with air from the balancing tank and the third pipeline can enter the hot water tank, generating a large number of steam drums within the hot water tank, causing intense thermal convection, which can cause a rapid drop in water temperature. Therefore, the present invention improves the sealing effect by designing a sealing structure between the seal and the second outlet pipe, effectively resolving the problem of a poorly sealed balancing tank, thereby preventing the generation of a large number of steam drums within the hot water tank, which would cause intense thermal convection and a rapid drop in water temperature. Therefore, the present invention optimizes the structure of the surge tank and its installation within the pipeline machine, aiming to achieve drip-free operation and long-term water discharge without water explosion. Furthermore, by adjusting the size and height of the float, the amount of water remaining inside the surge tank during sealing can be controlled. This prevents insufficient residual water from affecting the sealing effect, while also preventing excessive water from causing the liquid level at the water spout to drop insufficiently after water withdrawal, thereby causing dripping and leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the internal structure of the pipeline machine provided in an embodiment of the present invention.

[0023] Figure 2 A schematic diagram of the internal structure of the pipeline machine provided by an embodiment of the present invention from another perspective.

[0024] Figure 3 A three-dimensional diagram of the partial structure of a pipeline machine provided in an embodiment of the present invention.

[0025] Figure 4 A three-dimensional diagram of the partial structure of the pipeline machine provided by an embodiment of the present invention from another perspective.

[0026] Figure 5 A three-dimensional diagram of a balance box provided in an embodiment of the present invention.

[0027] Figure 6 This is a cross-sectional view of a balance box provided in an embodiment of the present invention.

[0028] Figure 7 for Figure 6 A magnified view of center.

[0029] Figure 8 This is a cross-sectional view of the balance box body provided by an embodiment of the present invention.

[0030] Figure 9 This is a three-dimensional diagram of the balance box body provided by an embodiment of the present invention.

[0031] Figure 10 A three-dimensional diagram of a cover provided in an embodiment of the present invention.

[0032] Figure 11 A cross-sectional view of a float provided in an embodiment of the present invention.

[0033] Figure 12 A cross-sectional view of a float and a seal provided in accordance with an embodiment of the present invention.

[0034] Figure 13 A three-dimensional diagram of a float provided in an embodiment of the present invention.

[0035] Figure 14 A three-dimensional diagram of a sealing member provided in an embodiment of the present invention.

[0036] In the figure: 1, balance box; 11, cover plate; 111, first outlet pipe; 112, first guide limiter assembly; 1121, first curved plate; 1122, first reinforcement plate; 1123, first accommodation space; 1124, first gap; 12, balance box body; 121, second outlet pipe; 1211, limiter protrusion; 123, second guide limiter assembly; 1231, second curved plate; 1232, second reinforcement plate; 1233, second accommodation space 1234, second gap; 124, first space; 125, second space; 13, float; 131, float body; 132, mounting hole; 133, mounting portion; 134, groove; 135, cavity; 14, seal; 141, sealing boss; 142, sealing protrusion; 143, mounting column; 2, Venturi tee; 3, hot water tank; 4, water outlet pipe; 5, first pipeline; 6, second pipeline; 7, third pipeline; 8, pipeline machine body. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0039] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention.

[0040] Embodiments of the present invention provide a balancing tank and pipeline machine. The present invention optimizes the structure of the balancing tank and its installation within the pipeline machine, aiming to achieve drip-free operation and long-term water discharge without explosions. Furthermore, by adjusting the size and height of the float, the amount of water remaining inside the balancing tank during sealing can be controlled. This prevents insufficient residual water from affecting the sealing effect, while also preventing excessive water from causing the liquid level at the water spout to drop insufficiently after water withdrawal, thereby causing dripping and leakage.

[0041] Please refer to Figures 1-14 The present invention provides a surge tank. In some embodiments, the surge tank 1 includes a surge tank body 12 and a cover plate 11 disposed on the surge tank body 12. The cover plate 11 is provided with a first outlet pipe 111 that communicates with the interior of the surge tank body 12 and with the outside world. The cover plate 11 is fixedly connected to a first guide and stop assembly 112 that extends into the interior of the surge tank body 12. The surge tank body 12 and the cover plate 11 can be connected by a fastening structure such as screws, which is not specifically limited.

[0042] In some embodiments, the first guide limit assembly 112 includes several first arc plates 1121 arranged in a ring shape, a first gap 1124 is formed between adjacent first arc plates 1121, several first arc plates 1121 are combined to form a first accommodating space 1123, and a first reinforcing plate 1122 is fixedly connected between the first arc plates 1121 and the cover plate 11.

[0043] In this embodiment, the first accommodating space 1123 is connected to the interior of the balance box body 12 through the first slit 1124, and the movement of the float 13 and the seal 14 is guided and limited by the plurality of first curved plates 1121 arranged in an annular shape, so that the float 13 and the seal 14 can move in the first accommodating space 1123 enclosed by the plurality of first curved plates 1121; the first curved plate 1121 is connected and fastened to the cover plate 11 by the first reinforcing plate 1122.

[0044] In some embodiments, the interior of the balance box body 12 includes a first space 124 and a second space 125. The first space 124 and the second space 125 are interconnected and form an L-shaped structure. The first guide limit assembly 112 of the cover plate 11 extends into the first space 124. The balance box body 12 is fixedly connected to the second guide limit assembly 123 located in the second space 125. The first guide limit assembly 112 and the second guide limit assembly 123 are coaxial.

[0045] In some embodiments, the second guide limit assembly 123 includes several second arc plates 1231 arranged in a ring shape, a second gap 1234 is formed between adjacent second arc plates 1231, several second arc plates 1231 are combined to form a second accommodating space 1233, and a second reinforcing plate 1232 is fixedly connected between the second arc plates 1231 and the balance box body 12.

[0046] In this embodiment, the second accommodating space 1233 is connected to the interior of the balance box body 12 through the second slit 1234, and the movement of the float 13 and the seal 14 is guided and limited by a plurality of annularly arranged second curved plates 1231, so that the float 13 and the seal 14 can move in the second accommodating space 1233 formed by the plurality of second curved plates 1231; the second curved plates 1231 are connected and tightened to the balance box body 12 by the second reinforcing plates 1232.

[0047] Optionally, the second accommodating space 1233 and the first accommodating space 1123 may both be cylindrical structures, and the second accommodating space 1233 and the first accommodating space 1123 of the cylindrical structure are coaxial and communicated with each other.

[0048] In some embodiments, a second outlet pipe 121 communicating with the interior of the balance box body 12 is provided at one end of the second space 125 away from the first space 124, and the second outlet pipe 121 is communicated with the second accommodating space 1233; a movable float 13 and a seal 14 are provided in the first accommodating space 1123 and the second accommodating space 1233, and the seal 14 is located between the float 13 and the second outlet pipe 121.

[0049] In this embodiment, a second outlet pipe 121 is provided at the bottom of the surge tank body 12. This second outlet pipe 121 is connected to the negative pressure port of the Venturi tee 2, which in turn communicates with the hot water tank 3. A first guide and stop assembly 112 for the float 13 is located in a first space 124 within the surge tank body 12, while a second guide and stop assembly 123 for the float 13 is located in a second space 125 within the surge tank body 12. The first guide and stop assembly 112 defines a first accommodation space 1123, while the second guide and stop assembly 123 defines a second accommodation space 1233. The float 13 and seal 14 can move up and down within the first and second accommodation spaces 1123 and 1233, respectively.

[0050] In some embodiments, a limiting protrusion 1211 that cooperates with the sealing member 14 is provided on a side of the second outlet pipe 121 facing the second accommodating space 1233 .

[0051] In some embodiments, the seal 14 includes a mounting column 143 and a sealing boss 141 fixedly connected to one side of the mounting column 143. The side of the sealing boss 141 away from the mounting column 143 is fixedly connected to a sealing protrusion 142. The side of the sealing boss 141 facing the sealing protrusion 142 is used to abut against the limiting protrusion 1211 of the second outlet pipe 121. The sealing protrusion 142 cooperates with the second outlet pipe 121. When the sealing boss 141 abuts against the limiting protrusion 1211 of the second outlet pipe 121, the sealing boss 141 extends into the second outlet pipe 121 to seal the second outlet pipe 121.

[0052] Furthermore, the sealing protrusion 142 may be a hemispherical structure, and the hemispherical sealing protrusion 142 may extend into the second outlet pipe 121 to seal it.

[0053] In some embodiments, the float 13 includes a float body 131 and a mounting portion 133 fixedly connected to the float body 131. A cavity 135 is formed between the float body 131 and the mounting portion 133. A mounting hole 132 is formed inside the mounting portion 133. A groove 134 is provided at one end of the float body 131 near the mounting hole 132. The mounting post 143 of the seal 14 extends into the mounting hole 132 of the float 13 and has an interference fit with the mounting hole 132. A portion of the sealing boss 141 is located in the groove 134 and abuts against the float body 131.

[0054] In this embodiment, the float 13 can be a long cylindrical structure, and the cavity 135 set inside the float 13 facilitates the float 13 to float up, ensuring the response sensitivity when opening; at the same time, by adjusting the height of the float 13 and the size of the cavity 135, the distance that the float 13 sinks below the water surface when floating can be controlled, thereby conveniently controlling the residual water amount in the balance box 1 during sealing, and achieving a better sealing effect.

[0055] Compared with other balancing boxes, the seal 14 of the balancing box 1 provided by the present invention is installed within the float 13, eliminating the need for tooling during installation and making installation and disassembly more convenient. Furthermore, the balancing box 1 forms a single seal by abutting the sealing boss 141 of the seal 14 against the limiting boss 1211 of the second outlet pipe 121. Simultaneously, the hemispherical sealing boss 142 can extend into the second outlet pipe 121, forming a double seal with the second outlet pipe 121, further enhancing the sealing effect. When the seal 14 is installed with the float 13, part of the sealing boss 141 is located within the groove 134 and abuts against the float body 131. Meanwhile, the mounting post 143 of the seal 14 extends into the mounting hole 132 of the float 13, forming an interference fit with the mounting hole 132. This avoids the problem of the seal 14 being squeezed and deformed during installation, resulting in a gap between the seal 14 and the mounting hole 132 of the float 13. The seal 14 can be made of a softer material such as food-grade rubber or silicone.

[0056] In addition, the present invention also provides a pipeline machine, including the above-mentioned balance tank 1, the pipeline machine also includes a pipeline machine body 8, and a hot water tank 3, a first pipeline 5, a Venturi tee 2, a second pipeline 6 and a third pipeline 7 installed in the pipeline machine body 8; the first pipeline 5, the second pipeline 6 and the third pipeline 7 are respectively connected to the three openings of the Venturi tee 2; the first pipeline 5 is connected to the external water supply, the third pipeline 7 is connected to the second outlet pipe 121 of the balance tank 1, the second pipeline 6 is connected to the bottom of the hot water tank 3, and the top of the hot water tank 3 is connected to the water outlet pipe 4, and the hot water in the hot water tank 3 flows out through the water outlet pipe 4.

[0057] When taking hot water from the hot water tank 3, the external water supply flows through the first pipe 5, the Venturi tee 2, and the second pipe 6, forming a negative pressure at the second outlet pipe 121 of the balance tank 3, sucking the float 13 and the seal 14, and the sealing boss 141 of the seal 14 abuts against the limiting protrusion 1211 of the second outlet pipe 121. At the same time, the sealing protrusion 142 of the hemispherical structure is deformed by the suction force and cooperates with the second outlet pipe 121 to improve the sealing effect, preventing the external air entering from the first outlet pipe 111 from entering the third pipe 7 connected to the hot water tank 3, ensuring that the water column is good and does not explode. At the same time, no violent heat convection is formed inside the hot water tank 3, slowing down the rate of decrease in water temperature, and improving the hot water making capacity and single hot water output of the equipment;

[0058] When water is taken from the hot water tank 3, the negative pressure of the Venturi tee 2 disappears. At this time, the liquid level in the water outlet pipe 4 is higher than the limit protrusion 1211 of the balance tank 1. Under the influence of water pressure and buoyancy, the float 13 rises rapidly in the second accommodating space 1233 and the first accommodating space 1123. The balance tank 1 is connected to the hot water tank 3 through the Venturi tee 2. At this time, under the action of atmospheric pressure, the liquid level in the water outlet pipe 4 drops rapidly until it maintains the same horizontal position as the liquid level in the balance tank 3, thereby achieving the effect of balancing the internal pressure of the hot water tank 3 and preventing dripping and leakage at the water spout.

[0059] In some embodiments, the first space 124 of the balancing tank 1 is located above the hot water tank 3 , and the second space 125 of the balancing tank 1 is lower than the top surface of the hot water tank 3 .

[0060] In this embodiment, through the structural layout inside the above-mentioned pipeline machine, after the balance tank 1 is installed, it is ensured that the limiting protrusion 1211 of the balance tank body 12 is located below the top surface of the hot water tank 3, and the bottom surface of the balance tank bottom 1 is lower than the top surface of the hot water tank 3.

[0061] In some embodiments, a baffle is provided at the connection between the second pipe 6 and the bottom of the hot water tank 3 .

[0062] In summary, the present invention provides a balancing tank and pipeline machine, wherein the first pipeline 5 is used to inlet cold water. The cold water flows sequentially through the first pipeline 5, the venturi tee 2, and the second pipeline 6 into the bottom of the hot water tank 3, pushing the hot water in the hot water tank 3 out of the outlet pipe 4. Due to the different temperatures and densities of the cold water when entering the hot water tank 3, the cold water will be deposited at the bottom of the hot water tank 3, pushing the hot water out. At the same time, a baffle is provided at the cold water inlet in the hot water tank 3, that is, a baffle is provided at the connection between the second pipeline 6 and the bottom of the hot water tank 3, to prevent the cold water from flowing directly upward when entering and causing heat convection. In addition, if the sealing of the balancing tank 3 is not tight when the cold water enters, causing the cold water to mix with the air in the balancing tank 3 and the third pipeline 7 and enter the hot water tank 3, a large number of steam drums will be generated in the hot water tank 3, forming intense heat convection, which will cause the water temperature to drop rapidly. Therefore, the present invention improves the sealing effect through the design of the sealing structure between the seal 14 and the second outlet pipe 121, and can effectively solve the problem of loose sealing of the balance tank 3, thereby avoiding the generation of a large number of steam drums in the hot water tank 3 to form intense heat convection and avoid causing the water temperature to drop rapidly. Therefore, the present invention optimizes the structure of the balance tank 3 and its installation method in the pipeline machine, aiming to achieve the effect of no dripping during use and long-term water discharge without water explosion. At the same time, by adjusting the size and height of the float, the amount of water remaining inside the balance tank during sealing can be controlled, which not only avoids the effect of too little residual water affecting the sealing effect, but also prevents the problem of too much water causing the liquid level at the water spout to drop insufficiently after the water is taken, thereby causing dripping and leakage.

[0063] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A balance box, characterized in that: include: A balance box body (12) is provided with a second outlet pipe (121) and a guide and limit assembly located inside the balance box body (12), wherein the guide and limit assembly includes an accommodation space communicating with the interior of the balance box body (12), the accommodation space being communicated with the second outlet pipe (121), and a limiting protrusion (1211) is provided on one side of the second outlet pipe (121) facing the accommodation space; A float (13) is movably arranged in the accommodating space, the float (13) comprising a float body (131) and a mounting portion (133) fixedly connected to the float body (131), a cavity (135) being formed between the float body (131) and the mounting portion (133), a mounting hole (132) being formed inside the mounting portion (133), and a groove (134) being provided at one end of the float body (131) close to the mounting hole (132); The sealing member (14) is movably arranged in the accommodating space and is located between the float (13) and the second outlet pipe (121). The sealing member (14) includes a mounting post (143) and a sealing boss (141) fixedly connected to one side of the mounting post (143). A sealing protrusion (142) is fixedly connected to the side of the sealing boss (141) away from the mounting post (143). The mounting post (143) is installed in the mounting hole (132). Part of the sealing boss (141) is fixedly connected to the mounting hole (132). 41) is located in the groove (134) and abuts against the float body (131); the side of the sealing boss (141) facing the sealing protrusion (142) is used to abut against the limiting protrusion (1211), and the sealing protrusion (142) is matched with the second outlet pipe (121); when the sealing boss (141) abuts against the limiting protrusion (1211), the sealing boss (141) extends into the second outlet pipe (121) to seal the second outlet pipe (121).

2. A balance box according to claim 1, characterized in that: The invention also includes a cover plate (11) provided on the balance box body (12), wherein the cover plate (11) is provided with a first outlet pipe (111) communicating with the interior of the balance box body (12), and the first outlet pipe (111) is communicated with the outside.

3. A balance box according to claim 2, characterized in that: The interior of the balancing box body (12) includes a first space (124) and a second space (125) that are interconnected; the guide and limit assembly includes a first guide and limit assembly (112) and a second guide and limit assembly (123); the first guide and limit assembly (112) is fixedly connected to the cover plate (11) and is located in the first space (124); the second guide and limit assembly (123) is fixedly connected to the balancing box body (12) and is located in the second space (125); the first guide and limit assembly (112) includes a first accommodating space (1123); the second guide and limit assembly (123) includes a second accommodating space (1233); the first accommodating space (1123), the second accommodating space (1233), and the second outlet pipe (121) are sequentially connected.

4. A balance box according to claim 3, characterized in that: The first guide and limit assembly (112) comprises a plurality of first arc-shaped plates (1121) arranged in an annular shape, a first slit (1124) is formed between adjacent first arc-shaped plates (1121), a first accommodation space (1123) is formed by the plurality of first arc-shaped plates (1121), and a first reinforcing plate (1122) is fixedly connected between the first arc-shaped plates (1121) and the cover plate (11); the second guide and limit assembly (123) comprises a plurality of second arc-shaped plates (1231) arranged in an annular shape, a second slit (1234) is formed between adjacent second arc-shaped plates (1231), a second accommodation space (1233) is formed by the plurality of second arc-shaped plates (1231), and a second reinforcing plate (1232) is fixedly connected between the second arc-shaped plates (1231) and the balance box body (12).

5. A balance box according to claim 3, characterized in that: The first accommodating space (1123), the second accommodating space (1233), and the second outlet pipe (121) are coaxial.

6. A balance box according to claim 1, characterized in that: The sealing protrusion (142) is a hemispherical structure, and the sealing protrusion (142) with the hemispherical structure can extend into the second outlet pipe (121) to seal it.

7. A balance box according to claim 1, characterized in that: The mounting post (143) of the sealing member (14) extends into the mounting hole (132) of the float (13) and is interference-fitted with the mounting hole (132).

8. A pipeline machine, characterized in that: The pipeline machine comprises a balancing tank as described in any one of claims 1 to 7, and the pipeline machine also comprises a pipeline machine body (8), and a hot water tank (3), a first pipeline (5), a Venturi tee (2), a second pipeline (6) and a third pipeline (7) installed in the pipeline machine body (8); the first pipeline (5), the second pipeline (6) and the third pipeline (7) are respectively connected to the three openings of the Venturi tee (2); the first pipeline (5) is connected to the external water supply, the third pipeline (7) is connected to the second outlet pipe (121) of the balancing tank (1), the second pipeline (6) is connected to the bottom of the hot water tank (3), the top of the hot water tank (3) is connected to a water outlet pipe (4), and the hot water in the hot water tank (3) flows out through the water outlet pipe (4).

9. A pipeline machine according to claim 8, characterized in that: The first space (124) and the second space (125) of the balancing tank (1) form an L-shaped structure; the first space (124) of the balancing tank (1) is located above the hot water tank (3); and the second space (125) of the balancing tank (1) is lower than the top surface of the hot water tank (3).

10. The pipeline machine according to claim 8, characterized in that: A baffle is provided at the connection between the second pipeline (6) and the bottom of the hot water tank (3).

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