Water casing pipe sealing joint and diaphragm compressor
By designing a water casing seal joint that passes through the water pipe and uses seals to achieve sealing, the problems of poor seal reliability and high welding accuracy in the prior art are solved, and higher seal reliability and lower processing costs are achieved.
Patent Information
- Application Number
- CN202422351486.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-09-25
AI Technical Summary
The welding accuracy requirements of the water casing sealing joints in existing diaphragm compressors are high, resulting in poor seal reliability and difficult to disassemble the air pipe.
A water sleeve sealing joint is designed. The air pipe passes through the water pipe and forms a coolant channel between the outer wall of the air pipe and the inner wall of the water pipe. The screw sleeve is equipped with the air pipe and sealed and welded with the water pipe. The sealing sleeve is connected to the screw sleeve. The first and second seals are surrounded by the air pipe and are pressed in the axial and radial direction respectively to achieve sealing.
Ensures the reliability of sealing between the water pipe and the air pipe, reduces the accuracy requirements at the weld, reduces processing costs, and facilitates the disassembly and replacement of the air pipe.
Smart Images
Figure CN222991685U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of diaphragm compressors, in particular to a water jacket sealing joint and a diaphragm compressor. Background Art
[0002] A diaphragm compressor divides the system into a hydraulic part and a gas part through a diaphragm. The hydraulic oil periodically pushes the diaphragm to reciprocate to compress the gas, thereby realizing high-pressure compression of the gas. The compressed gas in the diaphragm compressor has a relatively high temperature. Before the medium is discharged from the compressor, the gas temperature needs to be reduced to an appropriate temperature. Therefore, a cooling water pipe is usually wrapped outside the air pipe to cool down the gas in the air pipe.
[0003] In the past, screw sleeves were welded at both ends of the water pipe respectively. The air pipe was sleeved by the screw sleeves, and an O-ring was added between the screw sleeves and the air pipe for sealing. However, it is difficult to ensure the coaxiality of the screw sleeves welded at both ends. Therefore, not only the sealing effect of the O-ring will be affected, but also the disassembly of the air pipe will be difficult. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a water jacket sealing joint and a diaphragm compressor to alleviate the technical problems of high welding precision requirements and poor sealing reliability of the water jacket sealing joint in the prior art.
[0005] In a first aspect, the water jacket sealing joint provided by the utility model includes: a water pipe, an air pipe, a screw sleeve, a sealing sleeve, a first sealing member and a second sealing member;
[0006] The air pipe passes through the water pipe, and a coolant channel is formed between the outer wall of the air pipe and the inner wall of the water pipe;
[0007] The screw sleeve sleeves the air pipe, and the screw sleeve is hermetically welded to the water pipe;
[0008] The sealing sleeve sleeves the air pipe, and the sealing sleeve is connected to the screw sleeve;
[0009] Both the first sealing member and the second sealing member surround the air pipe. The first sealing member is axially pressed between the screw sleeve and the sealing sleeve along the air pipe, and the second sealing member is radially pressed between the sealing sleeve and the air pipe along the air pipe.
[0010] Combined with the first aspect, the utility model provides a first possible implementation manner of the first aspect, wherein the screw sleeve is provided with an inner convex ring portion;
[0011] The sealing sleeve is inserted and threadedly engaged with the screw sleeve, and the first sealing member is pressed between the sealing sleeve and the inner convex ring portion.
[0012] In combination with the first possible implementation manner of the first aspect, the present utility model provides a second possible implementation manner of the first aspect, wherein the inner hole of the inner convex ring portion is configured as a tapered hole, and the diameter of the tapered hole increases from the end close to the sealing sleeve to the end away from the sealing sleeve.
[0013] In combination with the first aspect, the present utility model provides a third possible implementation manner of the first aspect, wherein one end of the screw sleeve connected to the water pipe is provided with a neck, and a shoulder is provided at the end of the neck away from the water pipe;
[0014] The neck is inserted into the water pipe, the shoulder abuts against the water pipe, and at least one of the neck and the shoulder is hermetically welded to the water pipe.
[0015] In combination with the first aspect, the present utility model provides a fourth possible implementation manner of the first aspect, wherein one end of the sealing sleeve close to the water pipe is provided with an inner ring groove, and a limiting ring is formed at the end of the inner ring groove away from the water pipe;
[0016] The second sealing member is installed in the inner ring groove, and the second sealing member abuts against the limiting ring.
[0017] In combination with the first aspect, the present utility model provides a fifth possible implementation manner of the first aspect, wherein the water pipe is configured as a three-way pipeline, and the three-way pipeline includes: a coolant inlet, a coolant outlet, and a sealing port;
[0018] The coolant inlet is coaxially arranged with the sealing port, the coolant outlet is located between the coolant inlet and the sealing port, and the screw sleeve is hermetically welded to the sealing port.
[0019] In combination with the fifth possible implementation manner of the first aspect, the present utility model provides a sixth possible implementation manner of the first aspect, wherein the coolant inlet is hermetically welded to a coolant pipe, and the coolant pipe is sleeved outside the air pipe.
[0020] In combination with the first aspect, the present utility model provides a seventh possible implementation manner of the first aspect, wherein the first sealing member includes a polytetrafluoroethylene gasket.
[0021] In combination with the first aspect, the present utility model provides an eighth possible implementation manner of the first aspect, wherein the second sealing member includes an O-ring.
[0022] In the second aspect, the diaphragm compressor provided by the present utility model is equipped with the water pipe sleeve sealing joint described in the first aspect.
[0023] The embodiments of the present utility model bring the following beneficial effects: An air pipe passes through a water pipe, and a coolant channel is formed between the outer wall of the air pipe and the inner wall of the water pipe. A screw sleeve is sleeved on the air pipe, and the screw sleeve is hermetically welded to the water pipe. A sealing sleeve is sleeved on the air pipe, and the sealing sleeve is connected to the screw sleeve. The first sealing member and the second sealing member both surround the air pipe. The first sealing member is axially pressed between the screw sleeve and the sealing sleeve along the air pipe, and the second sealing member is radially pressed between the sealing sleeve and the air pipe along the air pipe. This not only ensures reliable sealing between the water pipe and the air pipe, but also reduces the precision requirements at the welding joint, thereby reducing the processing cost. In addition, the air pipe can be replaced smoothly, improving the structural reusability.
[0024] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, provides a detailed description as follows. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the related art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0026] Figure 1 Schematic diagram of the water pipe sleeve sealing joint provided by the embodiment of the present utility model;
[0027] Figure 2 Schematic diagram of the screw sleeve of the water pipe sleeve sealing joint provided by the embodiment of the present utility model;
[0028] Figure 3 Schematic diagram of the sealing sleeve of the water pipe sleeve sealing joint provided by the embodiment of the present utility model.
[0029] Reference numerals: 10 - water pipe; 11 - coolant inlet; 12 - coolant outlet; 13 - sealing port; 20 - air pipe; 30 - screw sleeve; 31 - inner convex ring part; 32 - tapered hole; 33 - neck; 34 - shoulder; 40 - sealing sleeve; 41 - inner ring groove; 42 - limiting ring; 50 - first sealing member; 60 - second sealing member; 70 - coolant pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0030] The following will clearly and completely describe the technical solutions of the present utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present utility model fall within the protection scope of the present utility model.
[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used to describe name differences and should not be construed as indicating or implying relative importance. For the physical quantities in the formula, if there is no separate annotation, they should be understood as the basic quantities of the basic units of the International System of Units, or the derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.
[0032] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0033] As Figure 1 shown, the water pipe sleeve sealing joint provided by the embodiment of the present utility model includes: a water pipe 10, an air pipe 20, a screw sleeve 30, a sealing sleeve 40, a first sealing member 50 and a second sealing member 60; the air pipe 20 passes through the water pipe 10, and a coolant channel is formed between the outer wall of the air pipe 20 and the inner wall of the water pipe 10; the screw sleeve 30 is sleeved on the air pipe 20, and the screw sleeve 30 is hermetically welded to the water pipe 10; the sealing sleeve 40 is sleeved on the air pipe 20, and the sealing sleeve 40 is connected to the screw sleeve 30; the first sealing member 50 and the second sealing member 60 both surround the air pipe 20, the first sealing member 50 is axially pressed between the screw sleeve 30 and the sealing sleeve 40 along the air pipe 20, and the second sealing member 60 is radially pressed between the sealing sleeve 40 and the air pipe 20 along the air pipe 20.
[0034] Specifically, the threaded sleeve 30 and the water pipe 10 are hermetically welded circumferentially to ensure good sealing at the welding joint. The threaded sleeve 30 and the sealing sleeve 40 press the first seal 50 axially, and the sealing sleeve 40 and the air pipe 20 press the second seal 60 radially. Thus, the threaded sleeve 30, the sealing sleeve 40 and the air pipe 20 cooperate to achieve sealing in sequence, improving the sealing reliability. During assembly, the air pipe 20 passes through the sealing sleeve 40, the second seal 60, the first seal 50, the threaded sleeve 30 and the water pipe 10. Under the condition of the threaded fit between the sealing sleeve 40 and the threaded sleeve 30, the air pipe 20, the sealing sleeve 40, the second seal 60, the first seal 50 and the threaded sleeve 30 must be in a substantially coaxial state, which not only facilitates the disassembly and replacement of the air pipe 20, but also reduces the precision requirements for the welding joint between the threaded sleeve 30 and the water pipe 10.
[0035] As Figure 1 and Figure 2 shown, in the embodiment of the present utility model, the threaded sleeve 30 is provided with an inner convex ring portion 31; the sealing sleeve 40 is inserted and threadedly fitted to the threaded sleeve 30, and the first seal 50 is pressed between the sealing sleeve 40 and the inner convex ring portion 31, so as to realize the axial limit of the first seal 50. When the first seal 50 is axially pressed, the sealing sleeve 40, the first seal 50 and the inner convex ring portion 31 are closely attached in sequence to achieve sealing.
[0036] In an optional embodiment, the inner hole of the inner convex ring portion 31 is configured as a tapered hole 32, and the diameter of the tapered hole 32 increases from the end close to the sealing sleeve 40 to the end away from the sealing sleeve 40. On the one hand, it can reduce the coolant pressure on the end face of the threaded sleeve 30, and on the other hand, it is convenient for the air pipe 20 to be inserted along the tapered hole 32 when the air pipe 20 is replaced.
[0037] In an optional embodiment, one end of the threaded sleeve 30 connected to the water pipe 10 is provided with a neck portion 33, and a shoulder portion 34 is formed at the end of the neck portion 33 away from the water pipe 10; the neck portion 33 is inserted into the water pipe 10, the shoulder portion 34 abuts against the water pipe 10, and at least one of the neck portion 33 and the shoulder portion 34 is hermetically welded to the water pipe 10, which not only facilitates the assembly alignment, but also can ensure the tight connection at the welding position.
[0038] As Figure 1 and Figure 3 shown, one end of the sealing sleeve 40 close to the water pipe 10 is provided with an inner ring groove 41, and a limiting ring 42 is formed at the end of the inner ring groove 41 away from the water pipe 10; the second seal 60 is installed in the inner ring groove 41, and the second seal 60 abuts against the limiting ring 42, so as to realize the axial limit of the second seal 60, and the loosening of the second seal 60 caused by the disassembly and assembly of the air pipe 20 can also be avoided.
[0039] Preferably, the inner diameter of the first seal 50 is smaller than the outer diameter of the second seal 60, and the second seal 60 can be blocked and restricted in the inner ring groove 41 by the first seal 50.
[0040] As Figure 1 shown, in this embodiment, the water pipe 10 is configured as a tee pipe, and the tee pipe includes: a coolant inlet 11, a coolant outlet 12, and a sealing port 13; the coolant inlet 11 and the sealing port 13 are coaxially arranged, the coolant outlet 12 is located between the coolant inlet 11 and the sealing port 13, the screw sleeve 30 is hermetically welded to the sealing port 13, the coolant flows in through the coolant inlet 11 and then flows out through the coolant outlet 12. During assembly, only the screw sleeve 30 and the sealing port 13 are welded, avoiding the coaxiality deviation caused by welding and affecting the assembly smoothness, reducing the welding technical requirements, thereby reducing the operation cost and the part cost.
[0041] In addition, the coolant inlet 11 is hermetically welded to the coolant pipe 70, and the coolant pipe 70 is sleeved outside the air pipe 20.
[0042] In an alternative embodiment, the first seal 50 includes a polytetrafluoroethylene gasket, and other wear-resistant gaskets can also be used, which can extend the service life of the equipment while achieving the sealing effect.
[0043] In an alternative embodiment, the second seal 60 includes an O-ring, and the inner diameter of the O-ring is slightly smaller than the outer diameter of the air pipe 20, so as to form an interference fit to ensure the sealing effect.
[0044] The diaphragm compressor provided by the embodiment of the present invention is equipped with the water jacket sealing joint described in the above embodiment, and this diaphragm compressor has the technical effects of the above water jacket sealing joint, which will not be elaborated here.
[0045] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A water jacket sealing joint, characterized in that: include: A water pipe (10), an air pipe (20), a threaded sleeve (30), a sealing sleeve (40), a first sealing member (50) and a second sealing member (60); The air pipe (20) passes through the water pipe (10), and a cooling liquid channel is formed between the outer wall of the air pipe (20) and the inner wall of the water pipe (10); The screw sleeve (30) is sleeved on the air pipe (20), and the screw sleeve (30) is sealed and welded to the water pipe (10); The sealing sleeve (40) is sleeved on the air pipe (20), and the sealing sleeve (40) is connected to the screw sleeve (30); The first sealing member (50) and the second sealing member (60) both surround the air pipe (20); the first sealing member (50) is compressed between the threaded sleeve (30) and the sealing sleeve (40) along the axial direction of the air pipe (20); and the second sealing member (60) is compressed between the sealing sleeve (40) and the air pipe (20) along the radial direction of the air pipe (20).
2. The water jacket sealing joint according to claim 1, characterized in that: The screw sleeve (30) is provided with an inner convex ring portion (31); The sealing sleeve (40) is inserted and threadedly engaged with the threaded sleeve (30), and the first sealing member (50) is compressed between the sealing sleeve (40) and the inner convex ring portion (31).
3. The water jacket sealing joint according to claim 2, characterized in that: The inner hole of the inner convex ring portion (31) is configured as a tapered hole (32), and the diameter of the tapered hole (32) increases gradually from an end close to the sealing sleeve (40) to an end away from the sealing sleeve (40).
4. The water jacket sealing joint according to claim 1, characterized in that: The end of the screw sleeve (30) connected to the water pipe (10) is provided with a neck (33), and the end of the neck (33) away from the water pipe (10) is provided with a shoulder (34); The neck (33) is inserted into the water pipe (10), the shoulder (34) abuts against the water pipe (10), and at least one of the neck (33) and the shoulder (34) is sealed and welded to the water pipe (10).
5. The water jacket sealing joint according to claim 1, characterized in that: An inner ring groove (41) is provided at one end of the sealing sleeve (40) close to the water pipe (10), and a limiting ring (42) is formed at one end of the inner ring groove (41) away from the water pipe (10); The second sealing member (60) is installed in the inner ring groove (41), and the second sealing member (60) abuts against the limiting ring (42).
6. The water jacket sealing joint according to claim 1, characterized in that: The water pipe (10) is configured as a three-way pipeline, and the three-way pipeline comprises: a coolant inlet (11), a coolant outlet (12) and a sealing port (13); The coolant inlet (11) and the sealing port (13) are coaxially arranged, the coolant outlet (12) is located between the coolant inlet (11) and the sealing port (13), and the screw sleeve (30) is sealingly welded to the sealing port (13).
7. The water jacket sealing joint according to claim 6, characterized in that: The coolant inlet (11) is sealed and welded to the coolant pipe (70), and the coolant pipe (70) is sleeved on the outside of the air pipe (20).
8. The water jacket sealing joint according to claim 1, characterized in that: The first sealing member (50) comprises a tetrafluoroethylene gasket.
9. The water jacket sealing joint according to claim 1, characterized in that: The second sealing member (60) comprises an O-ring.
10. A diaphragm compressor, characterized in that: The diaphragm compressor is equipped with the water jacket sealing joint according to any one of claims 1 to 9.