A pipe assembly and a control valve comprising the same

Abstract

The application discloses a pipeline assembly and a control valve comprising the same. The pipeline assembly comprises a seat body component and an adapter pipe. The seat body component comprises a body piece and a pipe body piece. The pipe body piece is made of stainless steel material. The adapter pipe is made of copper or copper alloy material. The pipe body piece is fixedly connected with the adapter pipe through welding. The adapter pipe comprises a first wall section and a second wall section. The second wall section comprises a reduced diameter section. The second wall section comprises a pipe diameter section. The inner wall diameter of the pipe diameter section is smaller than the inner wall diameter of the first wall section. The inner wall diameter of the first wall section is D1, the pipe wall thickness of the first wall section is T, and the length of the second wall section is L1. The following conditions are simultaneously satisfied: L1 is greater than or equal to 4 mm; L1 is greater than or equal to 3T; and L1 is greater than or equal to D1 / 5. The application avoids the hidden danger of damaging the pipeline system caused by the residual solder particles.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fluid pipeline system, in particular to a pipeline assembly and a control valve comprising the same. BACKGROUND

[0002] Pipeline assemblies are widely used in pipeline systems, for example, the valve connecting pipe of a control valve in a pipeline system is welded to the system through an adapter pipe. In recent years, considering the need to reduce product costs, many valve connecting pipes are made of stainless steel material, and are then welded to one end of an adapter pipe made of copper material, so that the other end of the adapter pipe can be welded to the copper pipe of the pipeline system.

[0003] Figure 7 The prior art is disclosed in Patent No. CN205781506U, which shows a schematic diagram of a four-way reversing valve connecting pipe connected to an air conditioning system pipeline. In this technical solution, the connecting pipe 3 is made of stainless steel, the copper bushing 4 and the air conditioning system pipeline 9 are made of red copper material. During installation, the air conditioning system pipeline 9 is sleeved into the copper bushing 4 and is fixed by brazing with copper-based filler. The quality risk that may exist in this operation is that when the air conditioning system pipeline 9 is vertically sleeved from the top for welding operation, the excess high-temperature filler will flow downward from the gap and penetrate towards the connecting pipe 3. Since the connecting pipe 3 is made of stainless steel, when the high-temperature copper-based filler contacts the surface of the stainless steel material, the "oil rolling" phenomenon may occur, that is, the high-temperature copper-based filler in the form of "micro-particles" jumps on the surface of the stainless steel material and slides into the interior of the connecting pipe 3 and remains in the inner cavity of the four-way reversing valve product, resulting in the residual filler particles entering the circulating system. SUMMARY

[0004] To solve the above technical problems, the present application provides a pipeline assembly, which comprises a seat body component and an adapter pipe, the seat body component comprises a body piece and a pipe body piece, the body piece is fixedly connected or integrally formed with the pipe body piece, the pipe body piece is made of stainless steel material, the adapter pipe is made of copper or copper alloy material, the pipe body piece is sleeved and matched with the adapter pipe, and the pipe body piece and the adapter pipe are fixedly connected by welding; the adapter pipe comprises a first wall segment and a second wall segment, the second wall segment is closer to the body piece than the first wall segment, the second wall segment comprises a reduced diameter segment, and the reduced diameter segment is reduced in diameter away from the first wall segment; and / or the second wall segment comprises a pipe diameter segment, the inner wall diameter of the pipe diameter segment is smaller than the inner wall diameter of the first wall segment; if the inner wall diameter of the first wall segment is set as D1, the pipe wall thickness of the first wall segment is T, and the length of the second wall segment is L1, then the following conditions are met simultaneously: L1≥4mm; L1≥3T; and L1≥D1 / 5.

[0005] Meanwhile, the application also provides a control valve, which comprises the pipeline assembly of the above technical solution; the control valve comprises a valve body component and a valve core component, the valve body component comprises the seat body component and the adapter pipe, and the body part is specifically a valve body, which is made of stainless steel material and is welded and fixed with the pipe body part.

[0006] The pipeline assembly and the control valve provided by the application have the first wall segment and the second wall segment of the adapter pipe, when the pipeline assembly is welded and installed with the pipeline of the system, the specific structure of the second wall segment can slow down the flow of the excess outflowing welding material, avoid the hidden danger that the welding material particles are left in the body part, and improve the reliability. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 Fig. 1 is a structural schematic diagram of a control valve provided by the application;

[0008] Figure 2 : Figure 1 Fig. 2 is a schematic diagram of a pipeline assembly;

[0009] Figure 3 : Figure 2 Fig. 3 is a structural schematic diagram of an adapter pipe;

[0010] Figure 4 : Figure 2 Fig. 4 is a local enlarged schematic diagram of a connection position;

[0011] Figure 5 Fig. 5 is a schematic diagram of another welding connection structure of an adapter pipe provided by the application;

[0012] Figure 6 Fig. 6 is a schematic diagram of a third welding connection structure of an adapter pipe provided by the application;

[0013] Figure 7 Fig. 7 is a schematic diagram of a pipeline assembly in the background art.

[0014] Figures 1-6 Fig. 1 is a structural schematic diagram of a control valve provided by the application;

[0015] 1-control valve;

[0016] 10-valve core component;

[0017] 11-slider, 12-connecting rod, 13-piston;

[0018] 20-valve body component;

[0019] 21-seat body component, 22-valve seat, 23-valve port;

[0020] 200-body part / valve body;

[0021] 300 / 300A-pipe body part;

[0022] 301 - inner wall fitting part;

[0023] 302 - outer wall fitting part;

[0024] 400 / 400A / 400B - adapter pipe;

[0025] 410 / 410A / 410B - first wall section;

[0026] 411 - outer wall fitting part; 412 - inner wall;

[0027] 413 - inner wall fitting part;

[0028] 420 / 420A / 420B - second wall section;

[0029] 421 - reduced diameter section, 422 - pipe diameter section;

[0030] 430 - pipe body fitting section;

[0031] 500 - pipe assembly;

[0032] 510 - connecting part;

[0033] 600 - hot melt welding material. DETAILED DESCRIPTION

[0034] In order to better understand the technical solutions of the present application, the application will be further described in detail below in combination with the drawings and specific embodiments. Obviously, the drawings described below are only some embodiments of the application, and other drawings can be obtained from these drawings without creative labor for those skilled in the art. The orientation words such as up, down, etc. involved in this paper are defined by the positions of the parts shown in the drawings relative to each other, and are only for the purpose of expressing the clarity and convenience of the technical solutions. It should be understood that the orientation words used in this paper should not limit the scope of the application claimed; it should also be understood that the connection, fixation, abutment and other structural relationships described in this paper should include direct and indirect methods, except for special explanations to embody the inventive idea.

[0035] Figure 1 A structural schematic diagram of a control valve given by the application, Figure 2 A schematic diagram of a pipe assembly, Figure 1 A structural schematic diagram of an adapter pipe, Figure 3 A schematic diagram of a connecting position, Figure 2 A structural schematic diagram of an adapter pipe, Figure 4 A schematic diagram of a connecting position, Figure 2 A partial enlarged schematic diagram of a connecting position.

[0036] As Figure 1 , Figure 2 ,Figure 3 and Figure 4 As shown in the figure, in this embodiment, the control valve 1 is a reversing valve used in a flow path system. The control valve 1 comprises a spool component 10 and a valve body component 20.

[0037] The valve body component 20 comprises a valve seat 22 and a seat body component 21, the seat body component 21 comprising a body piece 200 (as a valve body in the control valve 1). The seat body component 21 further comprises several pipe body pieces 300. The body piece 200 (i.e. the valve body) is a cylindrical structure, the valve seat 22 is welded in the cylindrical inner cavity of the body piece 200, and the valve seat 22 is provided with several valve ports 23, each valve port 23 corresponding to each pipe body piece 300.

[0038] The spool component 10 comprises a slider 11, a connecting rod 12 and a piston 13. Under the control of a pilot valve (not shown in the figure), the piston 13 drives the connecting rod 12 to push the slider 11 to slide on the valve seat 22 to open / close or switch each valve port 23.

[0039] In this embodiment, the pipe body pieces 300 corresponding to the valve ports 23 are three (E pipe, S pipe, C pipe), and each pipe body piece 300 is connected to the body piece (valve body) 200 by welding (of course, the pipe body piece and the body piece can also be an integrated material forming structure, such as a side hole stretch form). Another fluid inlet pipe (D pipe) directly communicates with the inner cavity of the valve body 200. Opening / closing the valve port 23 can switch the flow path passage state between modes (D-C, S-E) and (E-D, S-C) to achieve the purpose of reversing the control valve.

[0040] Referring to Figure 2 In this embodiment, the pipe assembly comprises the body piece 200 (i.e. the valve body), an adapter pipe 400 and a pipe member 500.

[0041] Considering the need to reduce the material cost of the control valve 1, the body piece 200 and the pipe body piece 300 are generally made of stainless steel material instead of copper or copper alloy material. However, the pipe member 500 in the system is still a copper or copper alloy pipe, so a copper or copper alloy material adapter pipe 400 is needed to be provided, and the control valve 1 is fixedly installed in the pipe system by welding the adapter pipe 400 with the pipe member 500 in the pipe system.

[0042] In this embodiment, the pipe body piece 300 is sleeved with the adapter pipe 400, and the adapter pipe 400 comprises a first wall segment 410 and a second wall segment 420, the first wall segment 410 is welded with the pipe member 500, and the second wall segment 420 is closer to the body piece 200 relative to the first wall segment 410.

[0043] Specifically, the first wall segment 410 of the adapter pipe 400 includes an outer wall matching part 411, and the pipe body 300 includes an inner wall matching part 301. The outer wall matching part 411 and the inner wall matching part 301 are welded to fixedly connect the adapter pipe 400 and the pipe body 300. The pipeline component 500 includes a connecting part 510. A copper-based hot melt welding material 600 is added between the outer wall of the connecting part 510 and the inner wall 412 of the first wall segment 410 of the adapter pipe 400 to fixedly connect the pipeline component 500 and the adapter pipe 400.

[0044] In the embodiment, the second wall segment 420 of the adapter pipe 400 includes a reduced diameter segment 421 that is reduced in diameter in a direction away from the first wall segment 410. When the pipeline component 500 is connected to the adapter pipe 400, the pipeline component 500 extends into the first wall segment 410 and abuts against the reduced diameter segment 421 as a limit to facilitate welding operation.

[0045] Referring to Figure 3 If the inner wall diameter of the first wall segment 410 is set as D1, the pipe wall thickness of the first wall segment 410 is T, and the length of the second wall segment is L1, the following conditions are satisfied simultaneously: L1≥4mm; L1≥3T; and L1≥D1 / 5.

[0046] In the embodiment, the structure and length of the second wall segment are limited, which has the beneficial effect that when the pipeline assembly is welded to the pipeline component 500 in the system, the adapter pipe 400 is vertically upwardly arranged with the first wall segment 410 located on the upper side of the second wall segment 420, and the pipeline component 500 is sleeved on the adapter pipe 400 from above, and then brazing is implemented by adding welding material.

[0047] In the operation process, the high-temperature copper-based welding material fills the space between the outer wall of the connecting part 510 and the inner wall 412 of the first wall segment 410, and the excess part of the welding material flows downwardly to the second wall segment 420 (see Figure 4 When the high-temperature copper-based welding material contacts the second wall segment 420 of the relatively low-temperature copper or copper alloy material, it gradually cools and is fixed on the surface of the second wall segment 420. Since the second wall segment 420 has an appropriate length (L1) to contact the welding material, the welding material is prevented from falling onto the surface of the pipe body 300 of the stainless steel material, and the phenomenon that the welding material is in the form of point-shaped "particles" and is "picked up" on the surface of the stainless steel material to slide into the valve body 200 is avoided, the hidden danger that the welding material particles remain and damage the system is avoided, and the reliability of the control valve is improved. Further, since the reduced diameter segment 421 is arranged on the second wall segment 420, the downward flow of the welding material is slowed down.

[0048] To make the welding material cool and fixed on the surface of the second wall segment 420. The length L1 of the second wall segment 420 is required to be ≥4mm. At the same time, the size of the inner wall diameter D1 of the first wall segment 410 is related to the amount of welding material required during the welding operation. If the size is set to be too large, the excess welding material that flows downward may also increase, affecting the flowability of the welding material flowing downward. Through analysis, setting L1≥D1 / 5 can make the welding material precipitate in the second wall segment 420. Similarly, the size of the pipe wall thickness T is related to the cooling speed of the workpiece, which will affect the cooling speed of the welding material during the downward flow process. Through technical analysis, L1≥3T can be set.

[0049] The second wall segment 420 is provided with a reduced diameter segment 421 to further prevent the downward flow speed of the welding material.

[0050] Similarly, as an extension of the above technical solution, the size of the pipe wall thickness t of the pipeline component 500 will also affect the cooling speed of the welding material during the downward flow process. If the pipe wall thickness of the connecting part 510 of the pipeline component 500 is set to be t, then as a further limitation, the length L1 of the second wall segment satisfies: L1≥3t.

[0051] Figure 5 Another schematic diagram of the welding connection structure of the adapter pipe given by the invention.

[0052] As shown in Figure 5 and referring to Figure 1 . Different from the foregoing technical solution, in this embodiment, the adapter pipe 400A includes a first wall segment 410A and a second wall segment 420A. The first wall segment 410A is welded and connected with the pipeline component 500, and the second wall segment 420A has an outer wall matching part and is welded and connected with the pipe body 300. The second wall segment 420A of the adapter pipe 400A includes a pipe diameter segment 422, the inner wall diameter of which is smaller than that of the first wall segment 410A, so that the first wall segment 410A and the second wall segment 420A form a stepped structure. When the pipeline component 500 is connected with the adapter pipe 400A, the pipeline component 500 extends into the first wall segment 410A and can abut against the stepped end of the pipe diameter segment 422 as a limit, facilitating the welding operation. If the length of the second wall segment 420A in Figure 5 is L1', the inner wall diameter of the first wall segment 410A is D1', and the pipe wall thickness of the first wall segment 410A is T', then referring to the foregoing technical solution, the following conditions are met simultaneously: L1'≥4mm; L1'≥3T'; L1'≥D1' / 5. The effect of the foregoing technical solution can also be achieved. Of course, as a further extension of the technical solution, the second wall segment can also include a pipe diameter segment and a reduced diameter segment at the same time to achieve the technical effect of the invention, which will not be described here.

[0053] Figure 6A schematic view of the welding connection structure of the third adapter pipe given in the invention.

[0054] As Figure 6 shown and with reference to Figure 1 . Unlike the foregoing technical solution, in this embodiment, the adapter pipe 400B comprises a fitting section 430, a second wall section 420B, and a first wall section 410B. The fitting section 430 is formed extending from the second wall section 420B in the direction of the body piece 200.

[0055] The pipe body piece 300A comprises an outer wall fitting portion 302, and the fitting section 430 comprises an inner wall fitting portion 413. The pipe body piece 300A is inserted into the adapter pipe 400B, and the outer wall fitting portion 302 and the inner wall fitting portion 413 are fitted to implement welding, so as to fixedly connect the pipe body piece 300A and the adapter pipe 400B. The first wall section 410B is welded and fixed with the pipeline component 500. The second wall section 420B is located between the pipe body piece fitting section 430 and the first wall section 410B. If the length of the second wall section 420B is L1", the inner wall diameter of the first wall section 410B is D1", and the pipe wall thickness of the first wall section 410B is T", then referring to the foregoing technical solution, the following conditions are simultaneously satisfied: L1"≥4mm; L1"≥3T'; and L1"≥D1" / 5. The effects of the foregoing technical solution can also be achieved. Here, no further elaboration is given.

[0056] The above are only preferred embodiments of the invention, and it should be noted that, for those of ordinary skill in the art, several improvements and refinements can be made without departing from the principles of the invention, and these improvements and refinements should also be considered within the protection scope of the invention.

Claims

1. A piping assembly, comprising a base component and an adapter pipe, wherein the base component includes a body component and a pipe component, the body component and the pipe component are fixedly connected or integrally formed, the pipe component is made of stainless steel, the adapter pipe is made of copper or a copper alloy, the pipe component and the adapter pipe are sleeved together, and the pipe component and the adapter pipe are welded and fixedly connected, characterized in that: The adapter includes a first wall section and a second wall section, the second wall section being closer to the body component than the first wall section. It also includes a pipe component, which is sleeved on the adapter and welded to the adapter. The pipe component includes a connecting part, and the outer wall of the connecting part and the inner wall of the first wall section include a thermofusion welding material. The second wall segment includes a reduced diameter section that narrows away from the first wall segment, and the pipe component extends into the first wall segment and abuts against the reduced diameter section; and / or the second wall segment includes a pipe diameter section whose inner wall diameter is smaller than that of the first wall segment, so that the first wall segment and the second wall segment form a stepped structure, and the pipe component extends into the first wall segment and abuts against the stepped end of the pipe diameter section; If the inner diameter of the first wall segment is set to D1, the wall thickness of the first wall segment is set to T, and the length of the second wall segment is set to L1, then the following conditions must be met simultaneously: L1≥4mm; L1≥3T; L1≥D1 / 5.

2. The piping assembly as claimed in claim 1, characterized in that, The pipe body includes an inner wall mating portion, and the adapter pipe includes an outer wall mating portion, with at least a portion of the outer wall mating portion located in the first wall segment or the second wall segment.

3. The piping assembly as described in claim 1, characterized in that, The pipe body includes an outer wall mating portion, and the adapter pipe includes an inner wall mating portion. The mating section of the inner wall mating portion is formed by extending from the second wall section toward the main body.

4. The piping assembly as described in any one of claims 1-3, characterized in that, The hot-melt welding material is a copper-based solder.

5. The piping assembly as claimed in claim 4, characterized in that, If the wall thickness of the connecting part of the pipeline component is set to t, then L1≥3t is satisfied.

6. A control valve, characterized in that, The control valve includes the piping assembly as described in any one of claims 1-5; the control valve includes a valve body component and a valve core component, the valve body component includes the seat component and the adapter pipe, the main body component is specifically the valve body, and the valve body is welded and fixed to the piping component.

7. The control valve as described in claim 6, characterized in that, The valve body component also includes a valve seat. The valve body is cylindrical. The valve seat is welded and fixed to the valve body. There are at least two tubular components. The tubular components communicate with the valve port on the valve seat. The valve core component includes a slider. The slider can slide relative to the valve seat to open / close the valve port.

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