Pressure maintaining pipeline of refrigeration equipment and disassembly and assembly method of pressure maintaining pipeline

Abstract

The invention provides a pressure maintaining pipeline of refrigeration equipment, which comprises a U-shaped pipe, both ends of the U-shaped pipe are connected with two-way pressure maintaining joints, the two two-way pressure maintaining joints are respectively connected to a first pipeline and a second pipeline, the U-shaped pipe is communicated with the first pipeline and the second pipeline through the two two-way pressure maintaining joints, and the bottom end of the U-shaped pipe is connected with a connecting pipe communicated with the U-shaped pipe. And the connecting pipe is provided with a sealing valve and a drain valve which are respectively arranged up and down. By arranging the U-shaped pipe, when disassembly is needed, liquid is filled into the U-shaped pipe, so that gas in the U-shaped pipe enters the first pipeline and the second pipeline, and after the U-shaped pipe is reinstalled, the liquid in the U-shaped pipe is discharged, so that the gas in the whole pipeline system is kept unchanged, and the pressure in the pipeline system before and after disassembly is consistent; and the maintenance is simpler and more convenient without re-regulating the pressure.

Description

Technical Field

[0001] The invention belongs to the field of refrigeration, and in particular relates to a pressure-maintaining pipeline of refrigeration equipment and a disassembly and assembly method thereof. Background Art

[0002] Refrigeration equipment usually includes a compressor, an indoor unit, an outdoor unit and other components, and the components are connected by pipes. When in use, the components of the refrigeration equipment need to be connected by pipes, and refrigerant needs to be added to the pipes to ensure the normal operation of the refrigeration equipment.

[0003] When existing refrigeration equipment fails and the pipeline needs to be disassembled and replaced, it is inconvenient to maintain the pressure of the refrigerant storage tank and connecting pipelines inside the refrigeration equipment. Although the unreplaced part of the pipeline can be sealed in advance with valves and other components before disassembly, when a certain section of the pipeline is removed, the pressure inside the pipeline will be lost. At the same time, there is air inside the reinstalled pipeline. In this way, after the pipeline is reconnected, it cannot be restored to the original pressure, resulting in a change in the internal pressure of the refrigeration equipment. Therefore, professional personnel are required to test and adjust the pipe pressure, which increases the complexity of maintenance and is very inconvenient. Summary of the invention

[0004] In order to overcome the deficiencies and existing problems of the prior art, the present invention provides a pressure-maintaining pipeline of a refrigeration equipment and a disassembly and assembly method thereof, which can effectively ensure the pipeline pressure of the refrigeration equipment without the need for pressure regulation and is convenient and simple to maintain.

[0005] The present invention is achieved through the following technical solutions:

[0006] A pressure-maintaining pipeline for refrigeration equipment comprises a U-shaped tube, both ends of the U-shaped tube are connected with two-way pressure-maintaining joints, the two two-way pressure-maintaining joints are respectively connected to a first pipeline and a second pipeline, the U-shaped tube conducts the first pipeline and the second pipeline through the two two-way pressure-maintaining joints, the bottom end of the U-shaped tube is connected with a connecting tube that conducts with the U-shaped tube, and the connecting tube is provided with a sealing valve and a drain valve that are respectively arranged up and down.

[0007] The present invention is also achieved through the following technical solutions:

[0008] A method for disassembling and assembling a pressure-maintaining pipeline comprises the following steps:

[0009] Dismantle the U-tube:

[0010] S1. Connect the liquid supply and suction integrated device to the connecting pipe, open the drain valve, and allow the liquid supply and suction integrated device to supply liquid. When liquid overflows from the drain valve, close the drain valve;

[0011] S2, opening the sealing valve, the liquid supply and suction integrated device injects liquid into the U-shaped tube, the gas in the U-shaped tube is squeezed and discharged into the first pipeline and the second pipeline, until the U-shaped tube is full of liquid, and the liquid supply and suction integrated device stops supplying liquid;

[0012] S3, plugging the first pipeline and the second pipeline through the two-way pressure-maintaining joint, disassembling and separating the two ends of the U-shaped tube from the two two-way pressure-maintaining joints, and separating the U-shaped tube from the liquid supply and suction integrated device;

[0013] Reinstall the U-tube:

[0014] S4, connect the liquid supply and suction integrated device to the connecting pipe, open the sealing valve, and supply liquid to the U-shaped tube until the U-shaped tube is filled with liquid;

[0015] S5, connecting the two ends of the U-shaped tube to two bidirectional pressure-maintaining joints respectively, and the liquid supply and suction integrated device performs liquid extraction until all the liquid in the U-shaped tube is extracted, closing the sealing valve, and separating the U-shaped tube from the liquid supply and suction integrated device;

[0016] S6. Connect the U-shaped tube to the first pipeline and the second pipeline respectively through two bidirectional pressure-maintaining joints.

[0017] The capacity of the U-shaped tube is measured before it leaves the factory, and the capacity is marked on the outer wall of the U-shaped tube.

[0018] The integrated liquid supply and suction device includes a transversely arranged hydraulic cylinder, one end of which is provided with an opening, a piston is provided in the hydraulic cylinder, the piston is connected to a piston rod, the piston rod extends from the opening to the outside of the hydraulic cylinder, the piston rod is connected to a reciprocating drive mechanism, the hydraulic cylinder is connected to a liquid supply box through a liquid inlet pipe, a liquid supply pump is provided on the liquid inlet pipe, a liquid outlet joint is provided at the end of the hydraulic cylinder, and the liquid outlet joint is connected to a liquid outlet pipe.

[0019] The reciprocating drive mechanism comprises an electric cylinder, which is arranged side by side with the hydraulic cylinder, and the output end of the electric cylinder is connected with the piston rod through a linkage plate.

[0020] An electronic flow meter is arranged on the liquid outlet joint.

[0021] The integrated liquid supply and suction device also includes a controller, which is electrically connected to the electronic flow meter and the liquid supply pump respectively.

[0022] The integrated liquid supply and suction device also includes a base, a liquid supply box is fixed on the base through a support column, a filling port is arranged on the top of the liquid supply box, and a liquid level display window is arranged on the side wall of the liquid supply box.

[0023] A support frame is arranged on the bottom plate, and the hydraulic cylinder and the reciprocating drive mechanism are both fixed on the support frame.

[0024] The present invention provides a U-shaped tube. When disassembly is required, liquid is filled into the U-shaped tube, so that the gas in the U-shaped tube enters the first pipeline and the second pipeline. After the U-shaped tube is reinstalled, the liquid in the U-shaped tube is discharged, so that the gas in the entire pipeline system remains unchanged, thereby achieving consistent pressure in the pipeline system before and after disassembly and assembly, and maintenance without re-pressure adjustment is more simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at point A;

[0027] Figure 3 is a flow chart of Embodiment 2 of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the liquid supply and suction integrated device of the present invention in use state;

[0029] Figure 5 and Figure 6 It is a structural schematic diagram of the liquid supply and suction integrated device of the present invention;

[0030] Figure 7 It is a schematic diagram of the connection structure between the hydraulic cylinder and the reciprocating drive mechanism in the present invention.

[0031] In the figure: 1-U-shaped tube, 2-bidirectional pressure-maintaining joint, 3-first pipeline, 4-second pipeline, 5-connecting pipe, 51-sealing valve, 52-drain valve, 6-liquid supply and suction integrated device, 61-hydraulic cylinder, 611-liquid outlet joint, 62-piston, 621-piston rod, 63-reciprocating drive mechanism, 631-electric cylinder, 632-linkage plate, 64-liquid inlet pipe, 641-liquid supply pump, 65-liquid supply box, 651-support column, 652-filling port, 653-liquid level display window, 66-liquid outlet pipe, 67-electronic flow meter, 68-controller, 69-base. DETAILED DESCRIPTION

[0032] In order to facilitate understanding by those skilled in the art, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Embodiment 1

[0034] like Figure 1 and Figure 2As shown, a pressure-maintaining pipeline of a refrigeration equipment includes a U-shaped tube 1, both ends of the U-shaped tube 1 are connected to a two-way pressure-maintaining joint 2, and the two two-way pressure-maintaining joints 2 are respectively connected to a first pipeline 3 and a second pipeline 4. The U-shaped tube 1 conducts the first pipeline 3 and the second pipeline 4 through the two two-way pressure-maintaining joints 2. This structure enables the U-shaped tube 1 to connect the pipelines between various devices of the refrigeration equipment to realize the transportation of refrigerant. The two-way pressure-maintaining joint 2 can realize the on-off control. If the structure described in the Chinese patent (Announcement No. CN116518167 A) is adopted, the refrigerant leakage can be prevented when the pipeline is disassembled.

[0035] The bottom end of the U-shaped tube 1 is connected with a connecting tube 5 which is in communication with the U-shaped tube 1. The connecting tube 5 is provided with a sealing valve 51 and a drain valve 52 which are arranged respectively at the top and the bottom. Liquid can be filled into the U-shaped tube 1 through the connecting tube 5. The sealing valve 51 is used to seal the connecting tube 5 to prevent gas leakage from the U-shaped tube 1 and is opened when the U-shaped tube 1 is filled with liquid or drained. The drain valve 52 is used to first drain the gas in the filling pipe when filling with liquid.

[0036] When disassembling the U-shaped tube 1, first fill the liquid into the U-shaped tube 1 so that the gas in the U-shaped tube 1 enters the first pipeline 3 and the second pipeline 4; when reinstalling the U-shaped tube, first fill the U-shaped tube with liquid, and after connecting the pipelines, discharge the liquid in the U-shaped tube, so that the gas in the entire pipeline system remains unchanged, thereby achieving consistent pressure in the pipeline system before and after disassembly.

[0037] Embodiment 2

[0038] like Figure 3 and Figure 4 As shown, a method for disassembling and assembling a pressure-maintaining pipeline comprises the following steps:

[0039] Disassembling the U-shaped tube 1: S1. Connect the integrated liquid supply and suction device 6 with the connecting tube 5, open the drain valve 52, and the integrated liquid supply and suction device 6 supplies liquid. When liquid overflows from the drain valve 52, close the drain valve 52. At this time, the gas in the liquid supply-related pipeline of the integrated liquid supply and suction device 6 is discharged; S2. Open the sealing valve 51, so that the integrated liquid supply and suction device 6 is connected with the U-shaped tube 1, and the integrated liquid supply and suction device 6 injects liquid into the U-shaped tube 1. The gas in the U-shaped tube 1 is squeezed and discharged into the first pipeline 3 and the second pipeline 4 until the U-shaped tube 1 is filled with liquid, and the integrated liquid supply and suction device 6 stops supplying liquid; S3. Block the first pipeline 3 and the second pipeline 4 through the two-way pressure-maintaining joint 2 to prevent gas leakage in the first pipeline 3 and the second pipeline 4, disassemble and separate the two ends of the U-shaped tube 1 from the two two-way pressure-maintaining joints 2 respectively, separate the U-shaped tube 1 from the integrated liquid supply and suction device 6, and complete the disassembly of the U-shaped tube 1.

[0040] Reinstall the U-shaped tube 1: S4, connect the liquid supply and suction device 6 to the connecting tube 5, open the sealing valve 51, and supply liquid to the U-shaped tube 1 until the U-shaped tube 1 is full of liquid; S5, connect the two ends of the U-shaped tube 1 to the two two-way pressure-maintaining joints 2 respectively, and use the liquid supply and suction device 6 to pump liquid until all the liquid in the U-shaped tube 1 is pumped out, close the sealing valve 51, and separate the U-shaped tube 1 from the liquid supply and suction device 6; S6, connect the U-shaped tube 1 to the first pipeline 3 and the second pipeline 4 respectively through the two two-way pressure-maintaining joints 2. The gas in the entire pipeline system remains unchanged before and after the U-shaped tube 1 is disassembled, so that the pressure in the pipeline system is consistent before and after the disassembly.

[0041] Furthermore, the capacity of the U-shaped tube 1 is measured before it leaves the factory, and the capacity is marked on the outer wall of the U-shaped tube 1 , so as to facilitate filling and drawing liquid according to the capacity of the U-shaped tube 1 .

[0042] like Figure 5 , Figure 6 and Figure 7 As shown, the liquid supply and suction integrated device 6 includes a hydraulic cylinder 61 arranged horizontally, one end of the hydraulic cylinder 61 is provided with an opening, a piston 62 is provided in the hydraulic cylinder 61, and the piston 62 is connected to a piston rod 621, which extends from the opening to the outside of the hydraulic cylinder 61, and pushes the piston rod 621 to pump or draw liquid. The piston rod 621 is connected to a reciprocating drive mechanism 63, and the reciprocating drive mechanism 63 is used to push the piston rod 621 to reciprocate. The reciprocating drive mechanism 63 includes an electric cylinder 631, which is arranged side by side with the hydraulic cylinder 61, and the output end of the electric cylinder 631 is connected to the piston rod 621 through a linkage plate 632, and the electric cylinder 631 can drive the piston rod 621 to move through the linkage plate 632.

[0043] The hydraulic cylinder 61 is connected to a liquid supply box 65 via a liquid inlet pipe 64, on which a liquid supply pump 641 is provided. A liquid outlet joint 611 is provided at the end of the hydraulic cylinder 61, and the liquid outlet joint 611 is connected to a liquid outlet pipe 66. The liquid supply pump 641 can supply the liquid in the liquid supply box 65 into the hydraulic cylinder 61.

[0044] The liquid outlet connector 611 is provided with an electronic flow meter 67 for measuring the amount of liquid flowing through the liquid outlet connector 611. The liquid supply and suction integrated device 6 further includes a controller 68, which is electrically connected to the electronic flow meter 67 and the liquid supply pump 641, respectively. The flow data of the electronic flow meter 67 and the liquid supply pump 641 can be fed back to the controller 68, and the controller 68 can control the liquid supply pump 641.

[0045] The integrated liquid supply and suction device 6 also includes a base 69, and the liquid supply box 65 is fixed on the base 69 through a support column 651, which is convenient for supporting and fixing the liquid supply box 65. A filling port 652 is provided on the top of the liquid supply box 65, which is used to add liquid into the liquid supply box 65. A liquid level display window 653 is provided on the side wall of the liquid supply box 65, which is convenient for observing the amount of liquid in the liquid supply box 65. A support frame 691 is provided on the bottom plate 69, and the hydraulic cylinder 61 and the reciprocating drive mechanism 63 are both fixed on the support frame 691, which is convenient for installing and fixing the hydraulic cylinder 61 and the reciprocating drive mechanism 63.

[0046] The working process of the integrated liquid supply and suction device 6 is as follows: liquid is injected into the liquid supply box 65 through the filling port 652, the liquid outlet pipe 66 is connected to the connecting pipe 5, the liquid supply pump 641 is started, and a fixed amount of liquid is supplied into the hydraulic cylinder 61, and then the electric cylinder 631 is started to drive the piston rod 621 to push the piston 62 to squeeze the inner volume of the hydraulic cylinder 61, so that the liquid in the hydraulic cylinder 61 is supplied into the connecting pipe 5 through the liquid outlet pipe 66; when liquid extraction is required, the electric cylinder 631 is started to drive the piston rod 621 to push the piston 62 in the reverse direction, and a negative pressure is formed in the liquid cylinder 61, so that the liquid in the connecting pipe 5 is extracted into the hydraulic cylinder 61 through the liquid outlet pipe 66.

[0047] The above embodiments are preferred implementations of the present invention and are not intended to limit the present invention. Without departing from the inventive concept of the present invention, any obvious replacements are within the protection scope of the present invention.

Claims

1. A pressure-maintaining pipeline for refrigeration equipment, characterized in that: It includes a U-shaped tube, both ends of the U-shaped tube are connected with two-way pressure-maintaining joints, the two two-way pressure-maintaining joints are respectively connected to the first pipeline and the second pipeline, the U-shaped tube conducts the first pipeline and the second pipeline through the two two-way pressure-maintaining joints, the bottom end of the U-shaped tube is connected with a connecting pipe that is connected to the U-shaped tube, and the connecting pipe is provided with a sealing valve and a drain valve arranged respectively above and below.

2. A method for disassembling and assembling the pressure-maintaining pipeline according to claim 1, comprising the following steps: Dismantle the U-tube: S1. Connect the liquid supply and suction integrated device to the connecting pipe, open the drain valve, and allow the liquid supply and suction integrated device to supply liquid. When liquid overflows from the drain valve, close the drain valve; S2, opening the sealing valve, the liquid supply and suction integrated device injects liquid into the U-shaped tube, the gas in the U-shaped tube is squeezed and discharged into the first pipeline and the second pipeline, until the U-shaped tube is full of liquid, and the liquid supply and suction integrated device stops supplying liquid; S3, plugging the first pipeline and the second pipeline through the two-way pressure-maintaining joint, disassembling and separating the two ends of the U-shaped tube from the two two-way pressure-maintaining joints, and separating the U-shaped tube from the liquid supply and suction integrated device; Reinstall the U-tube: S4, connect the liquid supply and suction integrated device to the connecting pipe, open the sealing valve, and supply liquid to the U-shaped tube until the U-shaped tube is filled with liquid; S5, connecting the two ends of the U-shaped tube to two bidirectional pressure-maintaining joints respectively, and the liquid supply and suction integrated device performs liquid extraction until all the liquid in the U-shaped tube is extracted, closing the sealing valve, and separating the U-shaped tube from the liquid supply and suction integrated device; S6. Connect the U-shaped tube to the first pipeline and the second pipeline respectively through two bidirectional pressure-maintaining joints.

3. The method for disassembling and assembling a pressure-maintaining pipeline according to claim 2, characterized in that: The capacity of the U-shaped tube is measured before it leaves the factory, and the capacity is marked on the outer wall of the U-shaped tube.

4. The method for disassembling and assembling a pressure-maintaining pipeline according to claim 2, characterized in that: The integrated liquid supply and suction device includes a transversely arranged hydraulic cylinder, one end of which is provided with an opening, a piston is provided in the hydraulic cylinder, the piston is connected to a piston rod, the piston rod extends from the opening to the outside of the hydraulic cylinder, the piston rod is connected to a reciprocating drive mechanism, the hydraulic cylinder is connected to a liquid supply box through a liquid inlet pipe, a liquid supply pump is provided on the liquid inlet pipe, a liquid outlet joint is provided at the end of the hydraulic cylinder, and the liquid outlet joint is connected to a liquid outlet pipe.

5. The method for disassembling and assembling a pressure-maintaining pipeline according to claim 4, characterized in that: The reciprocating drive mechanism comprises an electric cylinder, which is arranged side by side with the hydraulic cylinder, and the output end of the electric cylinder is connected with the piston rod through a linkage plate.

6. The method for disassembling and assembling a pressure-maintaining pipeline according to claim 4, characterized in that: An electronic flow meter is arranged on the liquid outlet joint.

7. The method for disassembling and assembling a pressure-maintaining pipeline according to claim 6, characterized in that: The integrated liquid supply and suction device also includes a controller, which is electrically connected to the electronic flow meter and the liquid supply pump respectively.

8. The method for disassembling and assembling a pressure-maintaining pipeline according to claim 4, characterized in that: The integrated liquid supply and suction device also includes a base, a liquid supply box is fixed on the base through a support column, a filling port is arranged on the top of the liquid supply box, and a liquid level display window is arranged on the side wall of the liquid supply box.

9. The method for disassembling and assembling a pressure-maintaining pipeline according to claim 8, characterized in that: A support frame is arranged on the bottom plate, and the hydraulic cylinder and the reciprocating drive mechanism are both fixed on the support frame.

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