Connecting unit of low-temperature heating system

Abstract

The invention relates to a connection unit of a heating system assembly for arranging a coolant mixing pump unit in a manifold system. The object of the present invention is to create a cryogenic heating system connection device suitable for assembling a mixing pump device on the basis of two identical connection devices so as to be integrated with a manifold assembly located on the left or right side thereof, while ensuring the horizontal position of a circulating pump rotation shaft when rotating about a pump connection shaft. The low-temperature heating system connecting device comprises a pipeline and a double-sided nozzle, wherein one end of the pipeline is provided with an internal thread, the other end of the pipeline is provided with an external thread, the pipeline is coaxial with the axis of the pipeline, the double-sided nozzle is perpendicular to the axis of the pipeline and deviates from the axis of the pipeline, and a cavity of the double-sided nozzle is combined with a cavity of the pipeline; wherein the nozzle of the present invention comprises an internal thread at one end and an external thread at the other end, the internal thread of the double-sided nozzle being equidistant from the pipeline axis, and wherein the manifold comprises an external thread and fixes a cap nut, the external thread of the manifold cooperating with any thread of the double-sided nozzle.

Description

Technical Field

[0001] The invention relates to a connecting device for heating system components, which is used for a coolant mixing pump device in a manifold system, in particular a coolant mixing pump device in a floor heating system. Background Art

[0002] The mixing pump unit of the floor heating system is the most important system component. It not only circulates the coolant in the circuit and maintains the required coolant temperature inside, but also ensures the integration of the heating pipes with the manifold, through which the coolant is distributed along the floor heating circuit and then collected back to the manifold and returned to the mixing pump unit.

[0003] The manifolds are located in another manifold assembly, one higher than the other, where the lower manifold is kept at a distance from the wall, allowing pipes to be led from the higher manifold to the floor behind. The main feature of the mixing pump unit is that the horizontal position of the circulating pump shaft needs to be ensured due to the design characteristics of the wet rotor circulating pump. The offset of the circulating pump connection axis relative to the axis of the mixing pump unit housing ensures the horizontal position of the circulating pump shaft, regardless of the rotation of the pump relative to its connection axis.

[0004] The mixing pump unit connects the heating unit or heating line to the manifold assembly while ensuring hydraulic isolation between them. The heating line and the manifold assembly can be located on the left or right side relative to each other. The assembly of a low-temperature heating system requires a series of mixing pump units.

[0005] A mixing pump unit (hereinafter referred to as MPU) for floor heating is known, with the article number VR-240, the data sheet of which can be found on the website:

[0006] https: / / vi ei r.ru / wp-content / up l oads / 2023 / 07 / VR240.pdf? ysc lid =l mu i sw4z91566770861

[0007] A video review of this product can be viewed on the website:

[0008] https: / / ya.ru / vi deo / previ ew / .

[0009] The VR-240 product is based on two different connection units and consists of a pipe with external threads at both ends. Perpendicular to the pipe is a nozzle with a manifold at the end suitable for mounting a cap nut that ensures the connection of the circulation pump. The axis of the manifold is perpendicular to and intersects the axis of the pipe. The nozzle cavity is connected to the pipeline cavity. The pipe of the upper MPU connection unit is provided with a thermostatic valve and a secondary circuit balancing valve, whose axes are located in the same plane as the axis of the nozzle. The bottom of the pipe of the lower MPU connection unit has a threaded nozzle for mounting a temperature sensor protection well, a drain valve, a thermometer and a bypass pipe. The device can be installed on the left and right side of the supporting manifold device. In particular, the horizontal offset of the connection port of the manifold unit is ensured by tilting the device 9° from the vertical axis.

[0010] The disadvantage of this MPU design is that it is not possible to mount the pump in any position relative to the connection axis to ensure the horizontal position of the pump axis of rotation, which is a prerequisite for reliable operation of the pump with a properly installed manifold assembly. This MPU is suitable for mounting a circulation pump, which can be ensured to be horizontal by simply positioning the pump shaft along the axis of the connection between the MPU and the manifold assembly when the circulation pump rotates. However, in this case, it is difficult to access the pump exhaust plug.

[0011] A known fixed-setting control device TE-SA is designated as 249KVD, the description of which can be found at the following website:

[0012] https: / / te-sa.com / wp-content / up l oads / 2021 / 01 / 249KVD_RU.pdf? l ang= ru

[0013] https: / / www.thermsaver.co.uk / wp-content / up l oads / 2015 / 07 / Comb i ned- Pump-Mixer-249KVD.pdf

[0014] The fixed-set MPU TE-SA is based on two different connection units: the feed unit and the mixing unit. The technically closest connection unit is the upper connection unit, the MPU feed unit adopted as the prototype.

[0015] To illustrate the essence of the prototype, Figure 1 An overall view of the connection device adopted as a prototype is shown. Figure 2 show Figure 1 The cross section AA. The connection device comprises a tube with an internal thread at one end and a coaxial external thread at the other end. The housing has a double-sided nozzle perpendicular to the pipeline, one end of the nozzle has a Mebus flange suitable for mounting the cap nut of the circulation pump, and the other end of the double-sided nozzle has an internal thread. The axis of the nozzle, flange and double-sided nozzle internal thread is perpendicular to the pipeline axis and offset from the pipeline axis. The nozzle cavity is combined with the pipeline cavity.

[0016] The disadvantage of this MPU connection device design is that the mixing pump device cannot be installed on the left and right sides of the manifold assembly. To connect the mixing pump device to the right side of the manifold assembly, the housing of the mixing pump device should adopt a mirror arrangement of the flange nozzle relative to an assumed plane through the axis of the housing pipe.

[0017] To ensure the connection with the manifold assembly and the heating pipework, the range of mixing pump unit housings with different configurations is expanded, which will lead to a reduction in the production component batch and an increase in production costs. The correct arrangement affects the space required for the control unit and the functionality and reliability of the entire heating system.

[0018] The technical problem is that the MPU assembly of the low temperature heating system requires two identical connections to connect to the manifold assembly on its left or right side, but for one or the other option they should be arranged opposite to the cap nut flange connecting the circulation pump. Summary of the invention

[0019] The object of the present invention is to create a low-temperature heating system connection device suitable for assembling a mixing pump device on the basis of two identical connection devices so as to be integrated with a manifold assembly located on the left or right side thereof and at the same time ensure the horizontal position of the circulating pump rotating axis when rotating around the pump connection axis.

[0020] The technical result of using the present invention is to provide the ability to assemble left-handed and right-handed MPUs using two identical connection units.

[0021] This technical achievement is achieved because the low-temperature heating system connection unit includes: a pipe with an internal thread at one end and an external thread at the other end and coaxial with the pipe axis; and a double-sided nozzle perpendicular to the pipe axis and offset from the axis, and its cavity is combined with the pipe cavity; wherein, the nozzle of the present invention includes an internal thread at one end and a fastening element at the other end, and the fastening element has a freely rotatable cap nut on it, which is used to connect a circulating pump fixed by a flange placed on the double-sided nozzle of the present invention, and the other end of the double-sided nozzle of the present invention has an internal thread, wherein the internal thread of the double-sided nozzle is equidistant from the pipe axis, and wherein the flange includes an external thread that matches any thread of the double-sided nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 An overall view of a connection device used as a prototype is shown.

[0023] Figure 2 Shows Figure 1 Cross section AA.

[0024] Figure 3 An overall view of the connection device housing is shown.

[0025] Figure 4 A cross section of the connector housing along the X-axis perpendicular to the double-sided nozzle axis is shown.

[0026] Figure 5 Shows Figure 4 Cross section BB.

[0027] Figure 6 An externally threaded flange is shown.

[0028] Figure 7 Shown is a bottom view of an externally threaded flange.

[0029] Figure 8Shown is a general view of the MPU assembly connection unit integrated with the manifold assembly located on the right.

[0030] Fig. 9 Shows Figure 8 Cross section CC.

[0031] Fig.10 Shown is a general view of the MPU assembly connection unit integrated with the manifold assembly on the left.

[0032] Fig.11 Shows Fig.10 Cross section DD.

[0033] Fig.12 A general view of the mixing pump arrangement is shown with the manifold assembly on the right.

[0034] Fig.13 Shows Fig.11 EE section of the diagram, with the manifold assembly omitted.

[0035] Fig.14 An overall view of the mixing pump device is shown with the manifold assembly on the left.

[0036] The reference numerals in the figures indicate the following:

[0037] 1- Pipeline;

[0038] 2-Internal pipe thread;

[0039] 3-Pipe external thread;

[0040] 4-Double-sided nozzle;

[0041] 5- cylindrical cavity;

[0042] 6-edge;

[0043] 7-Nozzle thread;

[0044] 8-flange;

[0045] 9-socket;

[0046] 10-flange thread;

[0047] 11- upper connecting device;

[0048] 12-lower connecting device;

[0049] 13-circulation pump;

[0050] 14-External thread flange;

[0051] 15-cap nut of the circulation pump;

[0052] 16-control valve;

[0053] 17-stop valve;

[0054] 18-Protective well;

[0055] 19-Thermostatic head with remote temperature sensor;

[0056] 20-capillary;

[0057] 21- Remote temperature sensor;

[0058] 22-check valve;

[0059] 23-Drain valve;

[0060] 24- Sealing gasket;

[0061] 25-One end connector with cover nut;

[0062] 26-manifold assembly;

[0063] X-pipeline axis;

[0064] Y-double-sided nozzle axis;

[0065] S-offset;

[0066] T1-the direction in which the coolant flows out of the high-temperature pipe;

[0067] T2-coolant flows to the high temperature pipeline;

[0068] T3-coolant flows to the low temperature line;

[0069] T4- The direction of coolant flow from the low temperature line. DETAILED DESCRIPTION

[0070] To illustrate the essence of the present invention, Figures 3 to 7 Shown is the housing and threaded flange of a low temperature heating system connection.

[0071] Design instructions for low temperature heating system connection devices (see Figures 8 to 11 ). The connection device of the low temperature heating system consists of a pipe 1, which has an internal thread 2 at one end and an external thread 3 at the other end, coaxial with the pipe axis X. A double-sided nozzle 4 is perpendicular to the pipe axis and offset S from the above axis, and its cavity is integrated with the pipe cavity. On one side of the external thread 3 of the pipe there is a cylindrical cavity 5, the end of which has a lip 6 for mounting an embedded non-return valve. The double-sided nozzle 4 has an identical internal thread 7, equidistant from the pipe axis.

[0072] The MPU is assembled using a wet rotor circulation pump 14 , equipped with two cap nuts 16 and two washers 24 .

[0073] Flange 14 with external thread 10 (see Figure 6 and Figure 7 ) is made of metal. The outer diameter of the flange 8 is smaller than the inner diameter of the cap nut 15, but larger than the through hole diameter of the cap nut of the circulating pump. There is a hexagonal socket 9 on the end face of the flange, and the socket has a hole surface for an hexagonal wrench. The external thread 10 of the flange 14 cooperates with any thread 7 of the double-sided nozzle.

[0074] The double-sided nozzle has two identical pipes, equidistant from the pipe axis, with internal threads at both ends, plus an externally threaded flange, so that circulating pumps with different thread sizes can be used in the MPU assembly. For this purpose, a cap nut 15 and flange 14 are used, and the external thread diameter of flange 8 is the appropriate d.

[0075] To illustrate the embodiments of the present invention, Figure 12 to Figure 14 A drawing of an MPU assembled based on two identical connection units is shown.

[0076] To assemble the MPU integrated with the manifold assembly 26 located on the right side (see Fig.12 and Fig.13 ), using two identical connection units (see Figure 8 and Fig. 9 ); In order to assemble the MPU integrated with the manifold assembly 26 located on the left side (see Fig.14 ), using two identical connection units (see Fig.10 and Fig.11 ), and use the same shell (see Figures 3 to 5 ) for assembly.

[0077] Specific implementation of the MPU component.

[0078] The two connection units are placed horizontally, one on top of the other. The X axes are parallel to each other, with the outer thread 3 of the housing pointing to the position of the low-temperature heating system manifold assembly 26. A non-return valve 22 is installed in the cavity 5 of one connection unit, allowing only coolant to flow from the outer thread 3 to the inner thread 2. The non-return valve is installed until the lip 6. The non-return valve on the connection device indicates that the connection device is a mixing device, while the connection device without a non-return valve is a feeding device.

[0079] The double-sided nozzle 4 of the upper connection unit 11 is farther from the wall, and the double-sided nozzle 4 of the lower connection unit 12 is closer to the wall. A flange 14 with an external thread 10 is screwed into the lower thread 7 of the double-sided nozzle 4 of the upper connection unit and the upper thread of the double-sided nozzle of the lower connection unit, and the cap nut 15 of the circulation pump 13 is pre-installed on the flange 14. According to the flow direction of the pumped liquid from the lower connection unit 12 to the upper connection unit 11, the circulation pump 14 is installed between the cap nuts 15 fixed on the connection unit and can rotate freely.

[0080] The single-end connector 25 with a cover nut is screwed into the internal thread 2 of each connecting unit pipe 1 for installing valves 16 and 17. The valve is installed through the gasket, and when installing, pay attention to the flow direction T1 and T2 of the coolant and the arrow on the valve body.

[0081] The protection well 18 is screwed into the upper thread of the double-sided nozzle of the upper connection unit, and the drain valve 23 is installed on the lower thread of the double-sided nozzle of the lower connection unit.

[0082] The valve 17 equipped with a flywheel can manually close and limit the coolant T1 flowing from the high temperature pipeline to the MPU. The control valve 16 is used to control and cut off the coolant flow T2 flowing from the MPU to the high temperature pipeline. The thermostatic head 19 is installed on the control valve 16 as a drive device and is connected to the external temperature sensor 21 through the capillary 20. The remote temperature sensor is installed in the protection well 18.

[0083] The development work and examples of the MPU assembly provided in the specification show that a technical problem is solved and a goal is achieved using the present invention, namely, to provide a mixing pump unit assembly based on two identical connection units for integration with a manifold assembly located on the left or right thereof, while ensuring the horizontal position of the rotating axis of the circulation pump when it rotates around its connection axis. Another unexpected feature of the connection unit is the ability to use the connection threads of circulation pumps of different sizes for MPU assembly, for which only a flange with an external thread of the appropriate flange diameter is needed, which was not possible before.

[0084] The applicant did not find the essential distinguishing features set out in the independent claims in the information published worldwide before the priority date of the present invention. The novel functionality of the connection device demonstrates the inventiveness of the solution.

Claims

1. A low-temperature heating system connection device, comprising a pipe having an internal thread at one end and an external thread at the other end and coaxial with the pipe axis, and a double-sided nozzle perpendicular to the pipe axis and offset from the position thereof, wherein the cavity of the double-sided nozzle is combined with the cavity of the pipe; wherein: The double-sided nozzle comprises an internal thread at one end and a freely rotatable cap nut at the other end, for connecting a circulation pump fixed by a flange placed on the double-sided nozzle, wherein the other end of the double-sided nozzle has an internal thread, wherein the internal thread of the double-sided nozzle is equidistant from the pipeline axis, and wherein the flange comprises an external thread that matches any thread of the double-sided nozzle.

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