Anti-falling structure of valve

Abstract

The utility model discloses a valve anti-falling structure, and relates to the technical field of valves, the valve anti-falling structure comprises an expansion valve and a connecting port fixedly arranged at the lower part of the expansion valve, a water pipe is inserted in the connecting port, the outer ring surface and the inner ring surface of the connecting port are respectively provided with a first external thread and an internal thread, and a rotary anti-falling mechanism is arranged in the connecting port; the rotating anti-falling mechanism comprises a second external thread arranged on the inner ring face of the internal thread in a meshed mode, a plurality of lining plates arranged in an array surrounding mode are arranged on one side of the second external thread, buckles are fixedly arranged in the middles of the lower surfaces of one sides of the lining plates, a hexagon nut is arranged outside the first external thread in a meshed mode, and an inner buckle plate is fixedly arranged on the lower portion of the hexagon nut; and one side of the inner ring surface of the inner buckle plate is propped against a semicircular bulge. The problems that the structure is corroded or aged due to the fact that a single-weight anti-falling device in the expansion valve makes contact with liquid for a long time, and the anti-falling effect becomes poor due to vibration are solved.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a valve anti-falling structure. Background Art

[0002] The expansion valve is an important component in the refrigeration system and is generally installed between the liquid storage cylinder and the evaporator. The expansion valve allows the medium-temperature and high-pressure liquid refrigerant to pass through its throttling to become low-temperature and low-pressure wet steam. The refrigerant then absorbs heat in the evaporator to achieve a refrigeration effect. The expansion valve controls the valve flow by changing the superheat at the end of the evaporator to prevent insufficient utilization of the evaporator area and knocking. For example, Chinese Patent Publication No. CN202122078017.7 discloses an expansion valve with a multi-stage sealing assembly for a heat exchanger. The above device has the following shortcomings.

[0003] The above-mentioned device protects the expansion valve connector from falling off by means of the connecting threads on the outside of the connector, the plug fixed at the front end of the connector, and a plurality of anti-falloff protrusions arranged on the outside of the plug. However, the above-mentioned device still uses a single anti-falloff structure, and the anti-falloff structure is still arranged in the connector. Therefore, after long-term use, the contact between the internal anti-falloff structure and the liquid may cause the internal structure to rust or age, thereby causing the anti-falloff and sealing effects to deteriorate. Moreover, when the above-mentioned device uses anti-falloff protrusions for anti-falloff, if the vibration is large, the protrusions may shift, resulting in looseness, thereby causing the anti-falloff effect to deteriorate. Utility Model Content

[0004] In order to improve the problem that the single anti-dropping device in the expansion valve may be in contact with liquid for a long time, causing the structure to corrode or age, and the anti-dropping effect may be reduced due to vibration, the present application provides a valve anti-dropping structure.

[0005] The present application provides a valve anti-drop structure that adopts the following technical solution:

[0006] A valve anti-drop structure, comprising an expansion valve and a connection port fixed at the lower part of the expansion valve, wherein a water pipe is inserted into the connection port, and characterized in that: the outer ring surface and the inner ring surface of the connection port are respectively provided with a first external thread and an internal thread, and a rotation anti-drop mechanism is provided in the connection port;

[0007] The rotation anti-slip mechanism comprises a second external thread meshingly arranged on the inner ring surface of the internal thread, a plurality of inner lining plates arranged in an array around the second external thread are arranged on the side away from the internal thread, a plurality of inner lining plates are located on the middle of the lower surface of the second external thread and are fixed with buckles that are movably penetrated by the water pipe, and a plurality of second limiting holes corresponding to the buckles and mutually clamped and fixed are opened on the lower part of the inner ring surface on the side opposite to the second external thread and the inner lining plate;

[0008] A hexagonal nut is meshed on the outside of the first external thread, and an inner buckle plate slidably connected to the water pipe is fixedly arranged at the lower part of the hexagonal nut. A semicircular protrusion fixed on the outer ring surface of the water pipe is abutted on one side of the inner ring surface of the inner buckle plate. A plurality of first limiting holes corresponding to the buckles are opened on the side wall of the water pipe, and the inner ring surface of the first limiting hole and the outer ring surface of the buckle are movably penetrated.

[0009] By adopting the above technical scheme, the first external thread and the internal thread respectively arranged on the inner and outer ring surfaces of the connection port arranged at the lower part of the expansion valve correspond to two anti-slipping methods respectively, and the internal thread cooperates with the second external thread and the inner lining plate, and then with the assistance of the buckle, to realize the first anti-slipping setting for the water pipe, and the first external thread cooperates with the hexagonal nut, and then the inner buckle plate and the semicircular protrusion arranged on the outer ring surface of the water pipe are mutually locked, so as to realize the second anti-slipping setting for the water pipe.

[0010] Preferably, the rotation anti-slip mechanism also includes a T-shaped ring groove opened on the upper part of the second external thread, a T-shaped ring rod is slidably arranged in the T-shaped ring groove, and a U-shaped ring fixedly connected to the inner lining plate is fixed on the side of the T-shaped ring rod away from the T-shaped ring groove.

[0011] By adopting the above technical solution, the T-ring groove and the T-ring rod can slide against each other and limit each other at the same time, and both surfaces are set to smooth surfaces to reduce wear and increase or decrease the sliding effect.

[0012] Preferably, a knob is fixedly provided at the lower portion of the second external thread and is slidably arranged with respect to the outer annular surface of the water pipe.

[0013] By adopting the above technical solution, the knob can drive the second external thread to rotate better.

[0014] Preferably, a first sealing ring is disposed on the knob at abutment with a side away from the second external thread and abutment with a side of the semicircular protrusion away from the inner buckle plate.

[0015] By adopting the above technical solution, the first sealing ring can not only achieve a sealing effect but also separate the knob from the semicircular protrusion to avoid friction between the two.

[0016] Preferably, the inner buckle plate is provided on one side of the semicircular protrusion with a second sealing ring abutting against the semicircular protrusion and having the same structure as the first sealing ring.

[0017] By adopting the above technical solution, the second sealing ring can increase the sealing performance while separating the semicircular protrusion from the inner buckle plate to avoid wear caused by contact friction between the two.

[0018] Preferably, the second external thread and the surface on the opposite side of the inner lining plate are slidably arranged with the inner annular surface and the outer annular surface of the water pipe respectively, and the upper part of the water pipe and the U-shaped ring are abutted against each other.

[0019] By adopting the above technical solution, the second external thread, the inner lining plate and the annular surfaces on both sides of the water pipe are slidably fitted to clamp the water pipe in the middle, thereby increasing the fixing effect.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. The water pipe is inserted and limited by the second external thread, the U-shaped ring and the inner lining plate, and then the clamping and limiting of the water pipe are realized by the cooperation between the buckle and the first limiting hole and the second limiting hole. Finally, the second external thread is threadedly connected with the internal thread by the knob, thereby realizing the first anti-slip setting;

[0022] 2. The semicircular protrusion arranged on the outside of the water pipe cooperates with the inner buckle plate arranged at the bottom of the hexagonal nut to achieve mutual positioning, and through the threaded connection between the hexagonal nut and the first external thread, the hexagonal nut is abutted and limited to the water pipe, thereby achieving the second anti-slip setting. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the overall connection diagram of this application;

[0024] Figure 2 This is a connection diagram between the anti-drop device and the expansion valve of the present application;

[0025] Figure 3 This is the internal structure diagram of the hexagonal bolt of this application;

[0026] Figure 4 A cross-sectional view of the anti-slip device of the present application;

[0027] Figure 5 This is an exploded view of the anti-slip device of the present application;

[0028] Figure 6 This is an internal cross-sectional view of the rotation anti-slip mechanism of the present application;

[0029] Figure 7 This is an exploded view of the rotation anti-slip mechanism of the present application.

[0030] Reference numerals: 1, expansion valve; 2, connection port; 3, first external thread; 31, internal thread;

[0031] 4. Rotation anti-slip mechanism; 41. Second external thread; 42. U-shaped ring; 43. Inner lining plate; 44. Buckle; 45. T-shaped ring rod; 46. T-shaped ring groove; 47. Knob; 48. Second limiting hole;

[0032] 5. First sealing ring; 6. Second sealing ring; 7. Hexagonal nut; 8. Water pipe; 9. Semicircular protrusion; 10. Inner buckle plate; 11. First limiting hole. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-Figure 7 This application is described in further detail.

[0034] The embodiment of the present application discloses a valve anti-falling structure.

[0035] Reference Figure 1-Figure 3 A valve anti-drop structure includes an expansion valve 1 installed between a liquid storage cylinder and an evaporator, and a connecting port 2 connected to an inner cavity of the expansion valve 1 is fixedly provided at the lower part of the expansion valve 1, and the connecting port 2 is used for connecting with a water pipe 8, and a first external thread 3 is provided on the outer ring surface of the connecting port 2, and an internal thread 31 is provided on the inner ring surface of the connecting port 2.

[0036] Reference Figure 3-Figure 7 , and a rotation anti-slip mechanism 4 is arranged inside the connection port 2, and the rotation anti-slip mechanism 4 includes a second external thread 41 meshedly arranged on the inner ring surface of the internal thread 31, and a T-shaped ring groove 46 with a surface set as a smooth plane is opened in the middle of the upper surface of the second external thread 41, and the inner surface of the T-shaped ring groove 46 and the outer surface of the T-shaped ring rod 45 also set as a smooth plane are slidably arranged with each other, and the T-shaped ring rod 45 is fixedly connected to the middle of the surface of one side of the U-shaped ring 42 on the side surface away from the T-shaped ring groove 46, and The other side surface of the U-shaped ring 42 opening is fixedly connected to the upper surface of the inner lining plate 43, and the inner arc surface of the U-shaped ring 42 can abut against the upper end surface of the water pipe 8 for limiting position, and the surface of the second external thread 41 and the inner lining plate 43 on the side opposite to the outer ring surface of the water pipe 8 are slidably arranged, and the surface of the inner lining plate 43 and the second external thread 41 on the side opposite to the inner ring surface of the water pipe 8 are slidably arranged, and a number of buckles 44 with the same structure and symmetrical around each other are fixed in the middle of the lower surface of the inner lining plates 43 on the side of the second external thread 41.

[0037] Reference Figure 3-Figure 7 , and a number of first limiting holes 11 are provided on the side wall of the water pipe 8, the number of which is the same as that of the buckles 44 and corresponds to each other, and the inner diameters of the first limiting holes 11 are consistent with the outer diameters of the buckles 44, so that the buckles 44 can flexibly penetrate the first limiting holes 11 and perform a limiting effect, so that the inner lining plate 43 can be clamped and fixed to the water pipe 8, and a number of second limiting holes 48 are provided on the lower part of the inner ring surface on the side opposite to the second external thread 41 and the inner lining plate 43, and the diameters of the second limiting holes 48 are consistent with the diameter of the buckles 44, so that the second limiting holes 48 can correspond to the buckles 44 and be clamped and fixed to each other, and the lower surface of the second external thread 41 away from the U-shaped ring 42 is fixedly connected to the surface of one side of the knob 47, and the inner ring surface of the knob 47 and the outer ring surface of the water pipe 8 are slidably arranged with each other.

[0038] The distance between the second external thread 41 and the inner lining plate 43 is smaller than the side wall thickness of the water pipe 8, so that the second external thread 41 and the inner lining plate 43 can clamp the side wall of the water pipe 8, and the second external thread 41 and the inner lining plate 43 can be made of hard plastic material, which can have good plasticity and corrosion resistance, and prevent long-term contact with liquid from causing rust or serious aging, and the U-shaped ring 42 can limit the water pipe 8 inserted between the second external thread 41 and the inner lining plate 43, so as to avoid the water pipe 8 being inserted too deeply during the plug-in process, resulting in the first limiting hole 11 opened on the side wall of the water pipe 8 not being able to be aligned with the second limiting hole 48 opened on the second external thread 41 and the inner lining plate The buckle 44 fixed on 43 is aligned with it, which makes it impossible for the buckle 44 to pass through the first limiting hole 11 and the second limiting hole 48 to be clamped and fixed, so that the water pipe 8 and the second external thread 41 and the inner lining plate 43 cannot be limited, and the knob 47 fixed on the side of the second external thread 41 away from the U-shaped ring 42 can drive the second external thread 41 to rotate. Under the mutual sliding cooperation of the T-shaped ring groove 46 opened on the side of the second external thread 41 away from the knob 47 and the knob 47 fixed on the surface of the opening side of the U-shaped ring 42, the second external thread 41 can follow the rotation of the knob 47 and then be threadedly connected with the internal thread 31, thereby realizing the first anti-slip setting.

[0039] It should be noted that the expansion valve 1, the connecting port 2 and the water pipe 8 are all prior art, and their structures are not described in detail again.

[0040] Reference Figure 2-Figure 4 , and the side of the knob 47 away from the second external thread 41 abuts against the surface of one side of the first sealing ring 5, and the side surface of the first sealing ring 5 away from the knob 47 abuts against the semicircular protrusion 9 fixed on the outer ring surface of the water pipe 8, thereby achieving the first layer of sealing effect, and the outer part of the first external thread 3 is threadedly connected with the inner part of the hexagonal nut 7, and the lower surface of the hexagonal nut 7 is fixedly connected with the surface of one side of the inner buckle plate 10, and the inner ring surface of the inner buckle plate 10 is slidably connected with the outer ring surface of the water pipe 8, and the surface of the inner buckle plate 10 located on the semicircular protrusion 9 abuts against the second sealing ring 6 One side surface is set to abut against each other, and the side surface of the second sealing ring 6 away from the inner buckle plate 10 and the side surface of the semicircular protrusion 9 away from the first sealing ring 5 are abutted against each other, and the second sealing ring 6 has the same structure as the first sealing ring 5, thereby realizing the second overall sealing, and the outer diameter of the semicircular protrusion 9 is smaller than the inner diameter of the hexagonal nut 7 by 1-2mm, and the inner diameter of the inner buckle plate 10 is larger than the outer diameter of the water pipe 8 by 1-2mm, so that the semicircular protrusion 9 cannot be separated from the inner buckle plate 10, so that the hexagonal nut 7 can limit the water pipe 8, thereby realizing the second anti-detachment setting.

[0041] The diameter of the inner buckle plate 10 is smaller than that of the semicircular protrusion 9, and the inner buckle plate 10 is fixed to the tail of the hexagonal nut 7, while the semicircular protrusion 9 is in the inner cavity of the hexagonal nut 7, so that the inner buckle plate 10 can have a downward falling effect on the semicircular protrusion 9, that is, to prevent the water pipe 8 from falling off, and the inner buckle plate 10 can move on the outer ring surface of the water pipe 8, so that the threaded connection between the hexagonal nut 7 and the first external thread 3 is not affected, and the second sealing ring 6 and the first sealing ring 5 that are respectively abutted against the inner buckle plate 10 and the knob 47 on both sides of the semicircular protrusion 9 can be clamped through the inner buckle plate 10, so as to achieve a good sealing effect, and the outside of the rotation anti-slip mechanism 4 is covered with the hexagonal nut 7, and the lower part is also supported by the inner buckle plate 10, so that the rotation anti-slip mechanism 4 will not cause the water pipe 8 to fall off even if it is a little loose during the vibration process.

[0042] The implementation principle of a valve anti-falling structure in an embodiment of the present application is as follows: first, the hexagonal nut 7 and the second sealing ring 6 are first sleeved on the water pipe 8, or the hexagonal nut 7 and the inner buckle plate 10 are also inserted from the other side of the water pipe 8, and then the water pipe 8 is inserted into the second external thread 41 and the inner lining plate 43, and the end of the water pipe 8 is abutted against the U-shaped ring 42, and then the protruding position of the semicircular protrusion 9 on the water pipe 8 is measured, but the positive and negative position shall not exceed 3mm, and then the position of the first limiting hole 11 is marked with a marker, and when everything is ready, the first sealing ring 5 is first abutted between the semicircular protrusion 9 and the knob 47, and then the water pipe 8 is inserted into the second external thread 41 and the inner lining plate 43 and abutted against the U-shaped ring 42, and then the water pipe 8 is rotated so that the buckle 44 can penetrate the first limiting hole 11 and the second limiting hole 48 to be clamped and fixed, and when the water pipe 8 is clamped and fixed to the entire rotation anti-falling mechanism 4, the first sealing ring 5 will also It will reach a certain deformation under the extrusion of the knob 47 and the semicircular protrusion 9, so as to achieve a better sealing effect. Then, align the entire U-shaped ring 42 with the internal thread 31, and turn the knob 47 clockwise to make the knob 47 drive the second external thread 41 to rotate and threadedly connect with the internal thread 31, thereby forming a first anti-slip setting. After the second external thread 41 and the internal thread 31 are connected in place, the hexagonal nut 7 is connected to the first external thread 3. At this time, the inner buckle plate 10 will push the second sealing ring 6 to abut against the semicircular protrusion 9, and then turn the hexagonal nut 7 to make the hexagonal nut 7 and the first external thread 3 are threadedly connected. As the threaded connection between the hexagonal nut 7 and the internal thread 31 is completed, the second sealing ring 6 also reaches a certain deformation under the extrusion of the inner buckle plate 10 and the semicircular protrusion 9, and then firmly abuts against the inner wall of the hexagonal nut 7 to achieve a second seal, and the hexagonal nut 7 and the internal thread 31 also complete the second anti-slip setting.

[0043] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A valve anti-drop structure, comprising an expansion valve (1) and a connection port (2) fixedly arranged at the lower part of the expansion valve (1), wherein a water pipe (8) is inserted into the connection port (2), characterized in that: The outer annular surface and the inner annular surface of the connection port (2) are respectively provided with a first external thread (3) and an internal thread (31), and a rotation anti-slip mechanism (4) is provided inside the connection port (2); The rotation anti-slip mechanism (4) comprises a second external thread (41) meshingly arranged on the inner annular surface of the internal thread (31); a plurality of inner lining plates (43) arranged in an array and surrounding the second external thread (41) are arranged on the side away from the internal thread (31); a plurality of inner lining plates (43) are located on the middle of the lower surface of the second external thread (41) and are fixedly provided with buckles (44) movably penetrated by the water pipe (8); a plurality of second limiting holes (48) corresponding to the buckles (44) and mutually clamped and fixed are opened on the lower part of the inner annular surface of the second external thread (41) opposite to the inner lining plate (43); The first external thread (3) is externally meshed with a hexagonal nut (7), an inner buckle plate (10) slidably connected to the water pipe (8) is fixedly provided at the lower part of the hexagonal nut (7), one side of the inner ring surface of the inner buckle plate (10) abuts against a semicircular protrusion (9) fixedly provided on the outer ring surface of the water pipe (8), a plurality of first limiting holes (11) corresponding to the buckles (44) are provided on the side wall of the water pipe (8), and the inner ring surface of the first limiting hole (11) and the outer ring surface of the buckle (44) are movably intersected.

2. A valve anti-drop structure according to claim 1, characterized in that: The rotation anti-slip mechanism (4) further comprises a T-shaped ring groove (46) provided on the upper portion of the second external thread (41), a T-shaped ring rod (45) being slidably disposed in the T-shaped ring groove (46), and a U-shaped ring (42) fixedly connected to the inner lining plate (43) being fixedly disposed on a side of the T-shaped ring rod (45) away from the T-shaped ring groove (46).

3. A valve anti-drop structure according to claim 1, characterized in that: A knob (47) is fixedly disposed at the lower portion of the second external thread (41) and is slidably arranged relative to the outer annular surface of the water pipe (8).

4. A valve anti-drop structure according to claim 3, characterized in that: The knob (47) is provided with a first sealing ring (5) disposed in contact with a side of the knob (47) away from the second external thread (41) and a side of the semicircular protrusion (9) away from the inner buckle plate (10).

5. The valve anti-drop structure according to claim 1, characterized in that: The inner buckle plate (10) is provided with a second sealing ring (6) located on one side of the semicircular protrusion (9) and abutting against the semicircular protrusion (9) and having the same structure as the first sealing ring (5).

6. A valve anti-drop structure according to claim 1, characterized in that: The second external thread (41) and the surface of the inner lining plate (43) on one side thereof are respectively slidably arranged with the inner annular surface and the outer annular surface of the water pipe (8), and the upper part of the water pipe (8) and the U-shaped ring (42) are arranged to abut against each other.

Images