Skid-mounted mixed heat supply unit

Abstract

The utility model relates to the technical field of heat supply units, and discloses a skid-mounted mixed heat supply unit which comprises a bearing chassis, a two-net water return pipeline is arranged at the top end of the bearing chassis, a first conveying pipe is communicated with the two-net water return pipeline, a cold and hot water mixing assembly is arranged on the bearing chassis, and a second conveying pipe is communicated with the cold and hot water mixing assembly. A cold water and hot water mixing assembly is arranged on the bearing base plate, a middle transmission rod is arranged in a water flow mixing tank in the cold water and hot water mixing assembly, a two-net water supply pipeline is communicated with the side edge of the cold water and hot water mixing assembly, and a valve is installed on the two-net water supply pipeline. A first stirring blade, a second stirring blade and a third stirring blade are respectively arranged on the middle transmission rod, so that water flows conveyed into the primary mixing barrel and the water flow mixing tank by a two-net water return pipeline and a one-net water supply pipeline can be fully mixed, and the conveyed water flows are not suddenly cold and hot, and further the water utilization requirement of a user is better met.

Description

Technical Field

[0001] This utility model relates to the field of heating unit technology, specifically a skid-mounted hybrid heating unit. Background Technology

[0002] Skid-mounted refers to a set of equipment fixed on a chassis made of angle steel or I-beams, which can be moved and positioned using pry bars (nowadays, lifting equipment is used). This set of equipment is exposed, which distinguishes it from a pressure regulating box. There are many other skid-mounted equipment, such as skid-mounted generator sets, skid-mounted air compressors, and heat exchanger units. Skid-mounted also refers to a pre-installed, integrated unit with valves, pumps, and other equipment, eliminating the need for additional valves, instruments, etc., when connecting to other equipment in the system. Only pipeline connections are required. Skid-mounted is a form of integrated equipment frame and equipment. Skid-mounted heating units are widely used in heating systems.

[0003] A search revealed that Chinese Patent Publication No. CN 213955393 U discloses a skid-mounted mixed heating unit, comprising a raised and stable base, a protective casing fixedly mounted on one side of the top of the raised and stable base, a water supply pump fixedly mounted on one side of the bottom inner wall of the protective casing, a water supply pipe fixedly mounted on the bottom of one side of the protective casing and communicating with the water supply pump inlet, an energy storage tank fixedly mounted at the center of the bottom inner wall of the protective casing, a booster pump fixedly mounted on the top of the energy storage tank, and a heating pipe fixedly connected to the outlet of the booster pump. This skid-mounted mixed heating unit is rationally designed, has a relatively high degree of automation, and can automatically perform functions such as water supply and temperature control. It uses multiple heat exchange tubes for heat exchange, increasing the heat exchange area and thus significantly improving heat exchange efficiency. The hot liquid flow is stable and not easily blocked, resulting in a longer service life. A silicone protective sleeve provides isolation and protection to prevent accidental burns to workers, enhancing safety performance.

[0004] The mixed heating unit described in the aforementioned patent still has certain shortcomings. In actual use, the skid-mounted mixed heating unit's heating pipeline consists of a primary supply network for transporting high-temperature hot water from the heat source to the mixed heating unit; a primary return network for returning low-temperature water (after mixing or heat exchange) to the heat source, forming a cycle; a secondary supply network for delivering hot water (meeting the user's required temperature) to the user; and a secondary return network for collecting the low-temperature water returned from the user and sending it back to the mixed heating unit for further processing. The secondary return water needs to be mixed with the primary supply water, and the mixed water is then pressurized and transported to the secondary supply network. The water supply network is designed to meet users' heating needs. However, when mixing the water flow between the secondary network return water and the primary network supply water, the traditional hot and cold water mixing method involves directly introducing the secondary network return water and the primary network supply water into a mixing tank for mixing. During the mixing process, a high-pressure pump continuously outputs the mixed water and delivers it to the secondary network supply pipeline. This mixing method is inefficient and cannot effectively mix the primary network hot water and the secondary network low-temperature water in a short time. Consequently, the mixed water delivered to the secondary network supply pipeline may sometimes be excessively hot or cold, failing to meet users' requirements for the temperature of the mixed hot water. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a skid-mounted mixed heating unit, which solves the problem of traditional hot and cold water mixing methods. In these methods, the return water from the secondary network and the supply water from the primary network are directly fed into a mixing tank for mixing. During the mixing process, a high-pressure pump continuously outputs the mixed water and delivers it to the secondary network supply pipeline. This mixing method is inefficient and cannot effectively mix the hot water from the primary network with the low-temperature water from the secondary network in a short time. Consequently, the mixed water delivered to the secondary network supply pipeline may sometimes be overheated or undercooled, failing to meet the user's requirements for the temperature of the mixed hot water.

[0006] This utility model provides the following technical solution: a skid-mounted mixed heating unit, including a supporting chassis, a second network return water pipe is provided at the top of the supporting chassis, a first conveying pipe is connected to the second network return water pipe, a first network water supply pipe is provided on the side of the second network return water pipe, a second conveying pipe is connected to the first network water supply pipe, a hot and cold water mixing component is provided on the supporting chassis, a second network water supply pipe is connected to the side of the hot and cold water mixing component, and a valve is installed on the second network water supply pipe;

[0007] The hot and cold water mixing assembly includes a mounting plate mounted on the supporting chassis. The mounting plate is fixedly connected to the supporting chassis by fastening bolts. A water mixing tank is fixed on the mounting plate. A drive motor is installed at the bottom of the mounting plate. A preliminary mixing cylinder is connected to the top of the water mixing tank. A central transmission rod is vertically installed inside the water mixing tank. The bottom of the central transmission rod is rotatably connected to the bottom of the water mixing tank. The top of the central transmission rod extends into the preliminary mixing cylinder. The drive end of the drive motor rotatably extends to the bottom of the water mixing tank and is fixedly connected to the bottom of the central transmission rod. Two first stirring blades are installed in the middle of the central transmission rod. A second stirring blade is installed at the top of the central transmission rod. A third stirring blade is installed at the bottom of the central transmission rod.

[0008] Preferred technical solution 1: The top of the water mixing tank is also provided with a flow-slowing mesh plate, and the central transmission rod passes through the middle of the flow-slowing mesh plate.

[0009] Preferred technical solution 2: A connecting bearing is sleeved on the central transmission rod, and the two sides of the connecting bearing are fixedly connected to the inner wall of the water mixing tank through the provided bearing fixing rod.

[0010] Preferred technical solution 3: Support blocks are provided at the bottom of the secondary return water pipe and the primary water supply pipe.

[0011] This solution enables the secondary return water pipe and the primary water supply pipe to be placed more stably on the supporting chassis.

[0012] Preferred technical solution four: The ends of both the first conveying pipe and the second conveying pipe are connected to the preliminary mixing cylinder.

[0013] This solution enables the hot and cold water transported in the second and first conveying pipes to enter the preliminary mixing drum.

[0014] Preferred technical solution five: The end of the secondary water supply pipeline is connected to the bottom of the water mixing tank.

[0015] This solution enables the mixed warm water to be transported to the secondary water supply pipeline for discharge.

[0016] Compared with the prior art, this utility model provides a skid-mounted mixed heating unit, which has the following advantages:

[0017] This invention features a hot and cold water mixing assembly mounted on a supporting chassis. The assembly includes a central transmission rod within a water mixing tank, which is equipped with a first, second, and third stirring blade. This assembly effectively mixes the water flowing from the secondary return water pipe and the primary supply water pipe to the preliminary mixing drum and the water mixing tank. This ensures that the water output from the secondary supply water pipe connected to the bottom of the water mixing tank has a moderate temperature, preventing sudden changes in temperature and thus better meeting the user's water usage requirements. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 For the present utility model Figure 1 Schematic diagram of the structure of the cold and hot water mixing component;

[0020] Figure 3 For the present utility model Figure 2 Internal structural diagram of a medium-flow mixing tank;

[0021] Figure 4 For the present utility model Figure 3 A schematic diagram of the structure of a medium-slow flow mesh plate.

[0022] In the diagram: 1. Supporting chassis; 2. Secondary water return pipe; 3. First delivery pipe; 4. Primary water supply pipe; 5. Secondary delivery pipe; 6. Hot and cold water mixing unit; 7. Secondary water supply pipe; 8. Valve;

[0023] 601. Mounting connecting plate; 602. Fastening bolts; 603. Water mixing tank; 604. Drive motor; 605. Preliminary mixing cylinder; 606. Central transmission rod; 607. First stirring blade; 608. Second stirring blade; 609. Third stirring blade; 610. Slow-flow mesh plate; 611. Connecting bearing; 612. Bearing fixing rod. Detailed Implementation

[0024] Please see Figure 1-4 ,

[0025] Example 1: A skid-mounted mixed heating unit includes a supporting chassis 1. A second-network return water pipe 2 is provided at the top of the supporting chassis 1. A first delivery pipe 3 is connected to the second-network return water pipe 2. A first-network supply water pipe 4 is provided on the side of the second-network return water pipe 2. A second delivery pipe 5 is connected to the first-network supply water pipe 4. A hot and cold water mixing component 6 is provided on the supporting chassis 1. A second-network supply water pipe 7 is connected to the side of the hot and cold water mixing component 6. A valve 8 is installed on the second-network supply water pipe 7.

[0026] The hot and cold water mixing assembly 6 includes a mounting plate 601 mounted on a supporting chassis 1. The mounting plate 601 is fixedly connected to the supporting chassis 1 by fastening bolts 602. A water mixing tank 603 is fixed on the mounting plate 601. A drive motor 604 is mounted at the bottom of the mounting plate 601. A preliminary mixing cylinder 605 is connected to the top of the water mixing tank 603. A central transmission rod 606 is vertically mounted inside the water mixing tank 603. The bottom of the central transmission rod 606 is rotatably connected to the bottom of the water mixing tank 603. The top of the central transmission rod 606 extends into the preliminary mixing cylinder 605.

[0027] The drive end of the drive motor 604 extends to the bottom of the water mixing tank 603 and is fixedly connected to the bottom end of the middle transmission rod 606. The middle of the middle transmission rod 606 is provided with two first stirring blades 607, the top of the middle transmission rod 606 is provided with a second stirring blade 608, and the bottom of the middle transmission rod 606 is provided with a third stirring blade 609. The top of the water mixing tank 603 is also provided with a slow-flow mesh plate 610. The middle transmission rod 606 passes through the middle of the slow-flow mesh plate 610. A connecting bearing 611 is sleeved on the middle transmission rod 606. The two sides of the connecting bearing 611 are fixedly connected to the inner wall of the water mixing tank 603 through the provided bearing fixing rods 612.

[0028] Example 2: The difference between this example and Example 1 is that the bottom of the secondary return water pipe 2 and the primary water supply pipe 4 are provided with support blocks.

[0029] This makes the secondary return water pipe 2 and the primary water supply pipe 4 more stable when placed on the supporting chassis 1.

[0030] Example 3: The difference between this example and Example 1 is that the ends of the first conveying pipe 3 and the second conveying pipe 5 are both connected to the preliminary mixing cylinder 605.

[0031] This allows the hot water and low-temperature water transported in the second conveying pipe 5 and the first conveying pipe 3 to enter the preliminary mixing cylinder 605.

[0032] Example 4: The difference between this example and Example 1 is that the end of the secondary water supply pipe 7 is connected to the bottom of the water mixing tank 603.

[0033] This allows the mixed warm water to be delivered to the secondary water supply pipeline 7 for discharge.

[0034] In this embodiment, the traditional hot and cold water mixing method involves directly introducing the secondary network return water and the primary network supply water into the mixing tank for mixing. During the mixing process, a high-pressure pump continuously outputs the mixed water and delivers it to the secondary network supply pipeline. This mixing method is inefficient and cannot effectively mix the primary network hot water and the secondary network low-temperature water in a short time. Consequently, the mixed water delivered to the secondary network supply pipeline may sometimes be overheated or undercooled, making it difficult to meet the user's requirements for the temperature of the mixed hot water.

[0035] In summary, in practical implementation, when users need to fully mix the low-temperature water and hot water transported by the secondary return water pipe 2 and the primary water supply pipe 4 before sending them into the secondary water supply pipe 7, a hot and cold water mixing assembly 6 is installed on the supporting chassis 1. The top of the water mixing tank 603 in the hot and cold water mixing assembly 6 is equipped with a preliminary mixing cylinder 605. The secondary return water pipe 2 is connected to the preliminary mixing cylinder 605 through a first conveying pipe 3, and the primary water supply pipe 4 is connected to the preliminary mixing cylinder 605 through a second conveying pipe 5. This allows low-temperature water and hot water to be transported to the preliminary mixing cylinder 605 simultaneously.

[0036] At the same time, the user needs to connect the drive motor 604 to start it, so that the drive motor 604 drives the central transmission rod 606 to rotate. The central transmission rod 606 has a third stirring blade 609 at the bottom, a second stirring blade 608 at the top, and a first stirring blade 607 in the middle, which can initially stir the low temperature water and hot water entering the initial mixing cylinder 605. The mixed water entering the water flow mixing tank 603 is stirred and mixed again by the first stirring blade 607.

[0037] Furthermore, a flow-slowing mesh plate 610 is installed on the top of the water mixing tank 603. The flow-slowing mesh plate 610 can further slow down the flow rate of the falling mixed water, thereby increasing the residence time of the mixed water in the water mixing tank 603. This allows the low-temperature water and hot water to be mixed more thoroughly, so that the mixed water delivered to the secondary water supply pipeline 7 is more in line with the user's usage standards and will not cause a feeling of sudden temperature changes.

Claims

1. A skid-mounted combined heat and power unit comprising a support base (1), characterised in that: The top end of the supporting bottom disc (1) is provided with a two-network backwater pipe (2), a first conveying pipe (3) is communicated with the two-network backwater pipe (2), a one-network water supply pipe (4) is arranged on the side of the two-network backwater pipe (2), a second conveying pipe (5) is communicated with the one-network water supply pipe (4), a cold and hot water mixing assembly (6) is arranged on the supporting bottom disc (1), a two-network water supply pipe (7) is communicated with the side of the cold and hot water mixing assembly (6), and a valve (8) is arranged on the two-network water supply pipe (7). The cold and hot water mixing assembly (6) comprises a mounting connecting plate (601) arranged on the supporting bottom disc (1), the mounting connecting plate (601) is fixedly connected with the supporting bottom disc (1) through fastening bolts (602) arranged thereon, a water flow mixing tank (603) is fixed on the mounting connecting plate (601), a driving motor (604) is arranged at the bottom end of the mounting connecting plate (601), a preliminary mixing cylinder (605) is communicated with the top end of the water flow mixing tank (603), a middle transmission rod (606) is vertically arranged in the water flow mixing tank (603), the bottom end of the middle transmission rod (606) is rotatably connected with the bottom of the water flow mixing tank (603), the top end of the middle transmission rod (606) extends into the preliminary mixing cylinder (605), the driving end of the driving motor (604) extends to the bottom of the water flow mixing tank (603) and is fixedly connected with the bottom end of the middle transmission rod (606), two first stirring blades (607) are arranged on the middle portion of the middle transmission rod (606), a second stirring blade (608) is arranged on the top end of the middle transmission rod (606), and a third stirring blade (609) is arranged on the bottom end of the middle transmission rod (606).

2. A packaged combined heat and power unit according to claim 1, characterized in that: The top portion of the water flow mixing tank (603) is further provided with a flow slowing net plate (610), and the middle transmission rod (606) penetrates the middle portion of the flow slowing net plate (610).

3. A packaged combined heat and power unit according to claim 2, characterised in that: A connecting bearing (611) is arranged on the middle transmission rod (606), and the two sides of the connecting bearing (611) are fixedly connected with the inner wall of the water flow mixing tank (603) through bearing fixing rods (612).

4. A packaged combined heat and power unit according to claim 3, characterised in that: Supporting blocks are arranged at the bottom portions of the two-network backwater pipe (2) and the one-network water supply pipe (4).

5. A packaged combined heat and power unit according to claim 4, characterised in that: The end portions of the first conveying pipe (3) and the second conveying pipe (5) are communicated with the preliminary mixing cylinder (605).

6. A packaged combined heat and power unit according to claim 5, characterised in that: The end portion of the two-network water supply pipe (7) is communicated with the bottom portion of the water flow mixing tank (603).

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