Rotary reversing valve

Abstract

The invention belongs to the technical field of reversing valves, and discloses a rotary reversing valve which comprises a reversing valve base, a plurality of evenly-distributed steering discharging openings are formed in the side face of the reversing valve base, and the middle of the reversing valve base is movably sleeved with a steering control assembly. The top of the steering control assembly extends to the position above the steering valve base and is fixedly connected with a feeding pipe, and the top of the steering valve base is connected with a locking mechanism located on the outer side of the steering control assembly. The steering control assembly comprises a steering valve element which is sleeved with the interior of the steering valve base in a sealed mode. Under the cooperation of the buffer cavity, when the pressure of materials entering the feeding pipe changes suddenly, the materials can be well buffered under the cooperation of the buffer spring and the buffer piston plate, and the materials can be slowly reset after the pressure of the materials is stable so as to ensure the continuous stability of the pressure, so that the situations of loosening of a connecting pipeline and the like caused by the sudden pressure change are avoided; and meanwhile, the damage strength caused by frequent sudden change of pressure to parts is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of reversing valves, in particular to a rotary reversing valve. Background Art

[0002] Reversing valves are generally used in refrigeration systems to achieve the conversion function between cooling and heating. With the development of industry, large-scale refrigeration equipment is also being used in the refrigeration industry. The refrigeration capacity requirements for reversing valves are also increasing, which requires the size of reversing valve products to be larger. Therefore, larger rotary reversing valves are often used to switch the cooling / heating functions of the system.

[0003] Since the steering valve needs to change the discharge direction frequently, it is equipped with multiple steering discharge ports, that is, multiple pipeline connections are unstable, and the pressure of the material transported in the steering valve is not completely stable, especially at the moment of opening, the pressure in the valve body suddenly increases, and the pressure suddenly decreases when closing, and the intensity of this change is large, and the impact on the connecting parts is more obvious. Therefore, the above-mentioned frequent pressure changes will increase the loosening rate of the connecting pipe at the steering discharge port, so it needs to be improved. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a rotary reversing valve, which has the advantage of relatively stable pressure.

[0005] Among them, with the cooperation of the buffer chamber, when the pressure of the material entering the feed pipe changes suddenly, it can be well buffered with the cooperation of the buffer spring and the buffer piston plate, and can be slowly reset after the material pressure stabilizes to ensure the continuous stability of the pressure, thereby avoiding the loosening of the connecting pipe due to sudden pressure changes, and at the same time reducing the destructive strength of the components caused by frequent sudden pressure changes.

[0006] To achieve the above object, the present invention provides the following technical solutions: a rotary reversing valve, comprising a steering valve base, a side of the steering valve base is provided with a plurality of steering outlets evenly distributed, a steering control assembly is movably sleeved in the middle of the steering valve base, a top of the steering control assembly extends to the top of the steering valve base and is fixedly connected to a feed pipe, and a locking mechanism located outside the steering control assembly is connected to the top of the steering valve base;

[0007] The steering control assembly includes a steering valve core sealed and sleeved inside a steering valve base, a steering valve cavity is provided inside the steering valve core, a connecting cavity located outside the steering valve cavity is provided inside the steering valve core, the steering valve cavity is connected with a steering discharge port through the connecting cavity, a buffer cavity is provided inside the steering valve core, both the connecting cavity and the buffer cavity are incomplete arc cavities, two ends of the connecting cavity are connected with two ends of the buffer cavity, and the inner cavity diameter of the buffer cavity is larger than the inner diameter of the connecting cavity.

[0008] Preferably, the cross-section of the steering valve cavity is a right-angle cavity, the upper end of the steering valve cavity is connected with the steering positioning linkage ring, and is connected with the feed pipe through the steering positioning linkage ring, and the lower end of the steering valve cavity extends along the radial direction of the steering valve core and is connected with the connecting cavity.

[0009] Preferably, a buffer spring is provided inside the buffer chamber, and both ends of the buffer spring are fixedly connected to a buffer piston plate, and the buffer piston plate is sealingly sleeved inside the buffer chamber; the far sides of the two buffer piston plates are respectively connected to the two ends of the buffer spring, and the close sides of the two buffer piston plates are respectively facing the two ends of the connecting chamber.

[0010] Preferably, the top of the steering valve core extends to above the steering valve base and is fixedly connected to a steering positioning linkage ring, the top of the steering positioning linkage ring is fixedly connected to the feed pipe, the outer surface of the steering positioning linkage ring is smooth, and the cross-section of the outer surface of the steering positioning linkage ring is a polygon.

[0011] Preferably, a steering knob is provided on the top of the steering positioning linkage ring, the bottom of the steering knob is in contact with the steering positioning linkage ring, the steering knob is movably sleeved on the outside of the feed pipe, and the bottom of the steering knob is fixedly connected to the locking mechanism.

[0012] Preferably, the locking mechanism includes a limit assembly fixedly connected to the top of the steering valve base, a positioning linkage assembly is mounted inside the limit assembly, the top of the positioning linkage assembly is fixedly connected to the bottom of the steering knob, and the positioning linkage assembly is movably sleeved on the outside of the steering positioning linkage ring.

[0013] Preferably, the positioning linkage assembly includes a positioning linkage ring fixedly connected to the bottom of the steering valve base, the positioning linkage ring is movably sleeved on the outside of the steering positioning linkage ring, the inner wall of the positioning linkage ring is adapted to the outer surface of the steering positioning linkage ring; the bottom of the positioning linkage ring is fixedly connected to a linkage pad, and the bottom of the linkage pad is fixedly connected to a positioning gear.

[0014] Preferably, the limit assembly includes a limit fixing ring fixedly connected to the top of the steering valve base, the lower end of the inner cavity of the limit fixing ring is fixedly sleeved with a limit gear, and the limit gear is meshingly sleeved on the outside of the positioning gear.

[0015] Preferably, a limiting cavity located above the limiting gear is opened inside the limiting fixing ring, an abutment ring is movably sleeved on the upper end of the inner cavity of the limiting cavity, the linkage pad is movably sleeved on the upper end of the inner cavity of the limiting cavity, and a number of evenly distributed reset mechanisms are arranged between the abutment ring and the linkage pad.

[0016] Preferably, the reset mechanism includes a limiting tube fixedly connected to the top of the linkage pad, the limiting tube is movably sleeved with a linkage slide rod inside, the upper end of the linkage slide rod passes through the limiting tube and is fixedly connected to the bottom of the abutment ring, and a reset spring is provided on the outside of the limiting tube, and the two ends of the reset spring are respectively fixedly connected to the abutment ring and the linkage pad.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Due to the setting of the connecting cavity of the present invention, when the pressure of the material entering the feed pipe suddenly changes with the cooperation of the buffer cavity, it can be well buffered with the cooperation of the buffer spring and the buffer piston plate, and can be slowly reset after the material pressure stabilizes to ensure the continuous stability of the pressure, thereby avoiding the loosening of the connecting pipe caused by the sudden change of pressure, and at the same time reducing the destructive strength of the parts caused by the frequent sudden changes of pressure.

[0019] 2. Due to the setting of the limit assembly of the present invention, the relative angle between the steering positioning linkage ring and the steering valve base can be fixed by locking the positioning linkage assembly, thereby avoiding the situation where the steering positioning linkage ring and the steering valve core are accidentally rotated to cause an unexpected change in the discharge angle, thereby reducing the probability of operational errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a cross-sectional view of the front side of the present invention;

[0022] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0023] Figure 4 It is a cross-sectional view of the top of the buffer cavity of the present invention;

[0024] Figure 5 It is a cross-sectional view of the top of the limiting cavity of the present invention.

[0025] In the figure: 1. steering valve base; 2. steering outlet; 3. steering control assembly; 31. steering knob; 32. steering positioning linkage ring; 33. steering valve core; 34. steering valve chamber; 35. connecting chamber; 36. buffer chamber; 37. buffer spring; 38. buffer piston plate; 4. feed pipe; 5. locking mechanism; 51. limit assembly; 511. limit fixing ring; 512. limit gear; 513. limit chamber; 514. limit pipe; 515. linkage slide rod; 516. abutment ring; 517. reset spring; 52. positioning linkage assembly; 521. positioning linkage ring; 522. linkage pad; 523. positioning gear. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figures 1 to 5 As shown, the present invention provides a rotary reversing valve, comprising a steering valve base 1, a plurality of steering outlets 2 evenly distributed are opened on the side of the steering valve base 1, a steering control assembly 3 is movably sleeved in the middle of the steering valve base 1, the top of the steering control assembly 3 extends to the top of the steering valve base 1 and is fixedly connected to a feed pipe 4, and the top of the steering valve base 1 is connected to a locking mechanism 5 located outside the steering control assembly 3;

[0028] The steering control assembly 3 includes a steering valve core 33 which is sealed and sleeved inside the steering valve base 1. A steering valve cavity 34 is provided inside the steering valve core 33. A connecting cavity 35 located outside the steering valve cavity 34 is also provided inside the steering valve core 33. The steering valve cavity 34 is connected to the steering outlet 2 through the connecting cavity 35. A buffer cavity 36 is also provided inside the steering valve core 33. Both the connecting cavity 35 and the buffer cavity 36 are incomplete arc cavities. Both ends of the connecting cavity 35 are connected to both ends of the buffer cavity 36. The inner cavity diameter of the buffer cavity 36 is larger than the inner diameter of the connecting cavity 35.

[0029] Among them, due to the setting of the connecting chamber 35, with the cooperation of the buffer chamber 36, when the pressure of the material entering the feed pipe 4 changes suddenly, the volume of the cavity between the steering valve chamber 34 and the steering outlet 2 changes to adapt to the change of material pressure, thereby reducing the impact on the connecting pipe at the outer end of the steering outlet 2.

[0030] like Figure 2As shown, the cross-section of the steering valve chamber 34 is a right-angle cavity, the upper end of the steering valve chamber 34 is connected with the steering positioning linkage ring 32, and is connected to the feed pipe 4 through the steering positioning linkage ring 32, and the lower end of the steering valve chamber 34 extends along the radial direction of the steering valve core 33 and is connected with the connecting chamber 35; due to the setting of the steering valve chamber 34, when the steering valve core 33 is rotated, the angle of the lower end of the steering valve chamber 34 can be changed, and then the lower end of the steering valve chamber 34 can be connected with different steering outlets 2 through the connecting chamber 35, thereby achieving the purpose of changing the conveying direction.

[0031] like Figure 2 and Figure 4 As shown, a buffer spring 37 is provided inside the buffer chamber 36, and both ends of the buffer spring 37 are fixedly connected to a buffer piston plate 38, and the buffer piston plate 38 is sealed and sleeved inside the buffer chamber 36; the far sides of the two buffer piston plates 38 are respectively connected to the two ends of the buffer spring 37, and the close sides of the two buffer piston plates 38 are respectively facing the two ends of the connecting chamber 35; due to the arrangement of the buffer piston plate 38, with the cooperation of the buffer spring 37, the pressure in the connecting chamber 35 can be well buffered, and can be slowly reset after the material pressure stabilizes, so as to ensure the continuous stability of the pressure, thereby avoiding the situation where the connecting pipe is loosened due to sudden pressure changes, and at the same time reducing the destructive strength of the components caused by frequent sudden pressure changes.

[0032] like Figure 2 and Figure 5 As shown, the top of the steering valve core 33 extends to the top of the steering valve base 1 and is fixedly connected with a steering positioning linkage ring 32. The top of the steering positioning linkage ring 32 is fixedly connected to the feed pipe 4. The outer surface of the steering positioning linkage ring 32 is smooth, and the cross-section of the outer surface of the steering positioning linkage ring 32 is a polygon. Due to the setting of the steering positioning linkage ring 32, the steering knob 31 can rotate the steering positioning linkage ring 32 through the positioning linkage ring 521, and then rotate the steering valve core 33. At the same time, with the cooperation of the positioning linkage ring 521, the steering knob 31 can still drive the steering positioning linkage ring 32 to rotate through the positioning linkage ring 521 after moving up and down, so as to contact the limit assembly 51 to lock the positioning linkage assembly 52, thereby achieving the effect of subjectively rotating the steering valve core 33.

[0033] like Figure 2 and Figure 3 As shown, a steering knob 31 is provided on the top of the steering positioning linkage ring 32, the bottom of the steering knob 31 contacts the steering positioning linkage ring 32, the steering knob 31 is movably sleeved on the outside of the feed pipe 4, and the bottom of the steering knob 31 is fixedly connected to the locking mechanism 5.

[0034] like Figure 2As shown, the locking mechanism 5 includes a limit assembly 51 fixedly connected to the top of the steering valve base 1, a positioning linkage assembly 52 is mounted inside the limit assembly 51, the top of the positioning linkage assembly 52 is fixedly connected to the bottom of the steering knob 31, and the positioning linkage assembly 52 is movably sleeved on the outside of the steering positioning linkage ring 32; due to the setting of the limit assembly 51, the positioning linkage assembly 52 can be locked to achieve the effect of fixing the relative angle between the steering positioning linkage ring 32 and the steering valve base 1, thereby avoiding the situation where the steering positioning linkage ring 32 and the steering valve core 33 are accidentally rotated to cause an unexpected change in the discharge angle, thereby achieving the effect of reducing the probability of operational errors.

[0035] like Figure 3 As shown, the positioning linkage assembly 52 includes a positioning linkage ring 521 fixedly connected to the bottom of the steering valve base 1, the positioning linkage ring 521 is movably sleeved on the outside of the steering positioning linkage ring 32, and the inner wall of the positioning linkage ring 521 is adapted to the outer surface of the steering positioning linkage ring 32; a linkage pad 522 is fixedly connected to the bottom of the positioning linkage ring 521, and a positioning gear 523 is fixedly connected to the bottom of the linkage pad 522; due to the setting of the linkage pad 522, under the restriction of the limit cavity 513, it can be ensured that the linkage pad 522 can drive the positioning gear 523 at its bottom to move up and down stably, thereby ensuring that the positioning gear 523 can accurately mesh with the limit gear 512 after moving downward.

[0036] like Figure 3 As shown, the limit assembly 51 includes a limit fixing ring 511 fixedly connected to the top of the steering valve base 1, and the lower end of the inner cavity of the limit fixing ring 511 is fixedly sleeved with a limit gear 512, and the limit gear 512 is meshed and sleeved on the outside of the positioning gear 523; due to the cooperation between the positioning gear 523 and the limit gear 512, the steering valve base 1 can lock the steering positioning linkage ring 32 through the limit assembly 51 and the positioning linkage assembly 52, and lock the relative angle between the lower end of the steering valve cavity 34 inside the steering valve core 33 and the steering outlet 2 on the surface of the steering valve base 1, thereby avoiding the situation where the angle of the lower end of the steering valve cavity 34 changes under unexpected circumstances, and ensuring stable steering and conveying of materials.

[0037] like Figure 3 As shown, a limiting cavity 513 located above the limiting gear 512 is opened inside the limiting fixing ring 511, an abutment ring 516 is movably sleeved on the upper end of the inner cavity of the limiting cavity 513, a linkage pad 522 is movably sleeved on the upper end of the inner cavity of the limiting cavity 513, and a number of evenly distributed reset mechanisms are arranged between the abutment ring 516 and the linkage pad 522.

[0038] like Figure 3As shown, the reset mechanism includes a limiting tube 514 fixedly connected to the top of the linkage pad 522, the limiting tube 514 is internally movably sleeved with a linkage slide rod 515, the upper end of the linkage slide rod 515 passes through the limiting tube 514 and is fixedly connected to the bottom of the abutment ring 516, and a reset spring 517 is arranged on the outer side of the limiting tube 514, and the two ends of the reset spring 517 are respectively fixedly connected to the abutment ring 516 and the linkage pad 522.

[0039] The working principle and use process of the present invention:

[0040] Pulling the steering knob 31 upwards can drive the positioning linkage assembly 52 to move upwards, and the movement of the positioning linkage assembly 52 can make the linkage pad 522 drive the positioning gear 523 to move upwards, thereby making the positioning gear 523 disengage from the limiting gear 512, and the upward movement of the linkage pad 522 can compress the return spring 517 under the cooperation of the limiting tube 514, the linkage slide rod 515 and the abutting ring 516 to enhance its elastic force recovery performance;

[0041] At this time, the locking of the positioning linkage assembly 52 by the limit assembly 51 can be released, and the positioning linkage ring 521 is still slidably sleeved on the outer surface of the steering positioning linkage ring 32, and then the steering knob 31 is turned to drive the steering positioning linkage ring 32 to rotate through the positioning linkage assembly 52; due to the arrangement of the linkage pad 522 and the abutment ring 516, the limit tube 514, the linkage slide rod 515 and the return spring 517 can rotate with the positioning linkage assembly 52, and will not be affected by the limit fixing ring 511, that is, it will not affect the elastic performance of the return spring 517; and the rotation of the steering positioning linkage ring 32 can drive the steering valve core 33 to rotate, that is, change the angular orientation of the lower end of the internal steering valve cavity 34, so that the material entering the feed pipe 4 is discharged from different steering outlets 2;

[0042] When the pressure of the material entering the feed pipe 4 suddenly increases or decreases, the two buffer piston plates 38 can be relatively guided with the cooperation of the connecting chamber 35 and the buffer chamber 36 to change the volume of the connecting section of the buffer chamber 36 and the connecting chamber 35, so as to use the sudden change in pressure and compress or stretch the buffer spring 37 to increase its elastic recovery performance. When the pressure of the material entering the feed pipe 4 is stable, the buffer piston plate 38 can be reset under the elastic recovery action of the buffer spring 37.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary reversing valve, comprising a reversing valve base (1), characterized in that: The side of the steering valve base (1) is provided with a plurality of steering outlets (2) which are evenly distributed. A steering control assembly (3) is movably sleeved in the middle of the steering valve base (1). The top of the steering control assembly (3) extends to the top of the steering valve base (1) and is fixedly connected to a feed pipe (4). The top of the steering valve base (1) is connected to a locking mechanism (5) located outside the steering control assembly (3). The steering control assembly (3) comprises a steering valve core (33) which is sealed and sleeved inside a steering valve base (1); a steering valve cavity (34) is provided inside the steering valve core (33); a connecting cavity (35) located outside the steering valve cavity (34) is provided inside the steering valve core (33); the steering valve cavity (34) is communicated with a steering discharge port (2) through the connecting cavity (35); a buffer cavity (36) is provided inside the steering valve core (33); both the connecting cavity (35) and the buffer cavity (36) are incomplete arc cavities; two ends of the connecting cavity (35) are communicated with two ends of the buffer cavity (36); the inner cavity diameter of the buffer cavity (36) is larger than the inner diameter of the connecting cavity (35).

2. A rotary reversing valve according to claim 1, characterized in that: The cross section of the steering valve cavity (34) is a right-angle cavity. The upper end of the steering valve cavity (34) is connected to the steering positioning linkage ring (32) and is connected to the feed pipe (4) through the steering positioning linkage ring (32). The lower end of the steering valve cavity (34) extends along the radial direction of the steering valve core (33) and is connected to the connecting cavity (35).

3. A rotary reversing valve according to claim 1, characterized in that: A buffer spring (37) is arranged inside the buffer chamber (36), and both ends of the buffer spring (37) are fixedly connected to a buffer piston plate (38), and the buffer piston plate (38) is sealed and sleeved inside the buffer chamber (36); the far sides of the two buffer piston plates (38) are respectively connected to the two ends of the buffer spring (37), and the close sides of the two buffer piston plates (38) are respectively facing the two ends of the connecting chamber (35).

4. A rotary reversing valve according to claim 1, characterized in that: The top of the steering valve core (33) extends to the top of the steering valve base (1) and is fixedly connected to a steering positioning linkage ring (32); the top of the steering positioning linkage ring (32) is fixedly connected to a feed pipe (4); the outer surface of the steering positioning linkage ring (32) is smooth; and the cross-section of the outer surface of the steering positioning linkage ring (32) is a polygon.

5. A rotary reversing valve according to claim 4, characterized in that: A steering knob (31) is arranged on the top of the steering positioning linkage ring (32), the bottom of the steering knob (31) is in contact with the steering positioning linkage ring (32), the steering knob (31) is movably sleeved on the outside of the feed pipe (4), and the bottom of the steering knob (31) is fixedly connected to the locking mechanism (5).

6. A rotary reversing valve according to claim 5, characterized in that: The locking mechanism (5) comprises a limit assembly (51) fixedly connected to the top of the steering valve base (1); a positioning linkage assembly (52) is sleeved inside the limit assembly (51); the top of the positioning linkage assembly (52) is fixedly connected to the bottom of the steering knob (31); and the positioning linkage assembly (52) is movably sleeved on the outside of the steering positioning linkage ring (32).

7. A rotary reversing valve according to claim 6, characterized in that: The positioning linkage assembly (52) comprises a positioning linkage ring (521) fixedly connected to the bottom of the steering valve base (1); the positioning linkage ring (521) is movably sleeved on the outside of the steering positioning linkage ring (32); the inner wall of the positioning linkage ring (521) is adapted to the outer surface of the steering positioning linkage ring (32); the bottom of the positioning linkage ring (521) is fixedly connected to a linkage pad (522); the bottom of the linkage pad (522) is fixedly connected to a positioning gear (523).

8. A rotary reversing valve according to claim 7, characterized in that: The limit assembly (51) comprises a limit fixing ring (511) fixedly connected to the top of the steering valve base (1); the lower end of the inner cavity of the limit fixing ring (511) is fixedly sleeved with a limit gear (512); and the limit gear (512) is meshedly sleeved with the outside of the positioning gear (523).

9. A rotary reversing valve according to claim 8, characterized in that: The limiting fixing ring (511) is provided with a limiting cavity (513) located above the limiting gear (512) inside, the upper end of the inner cavity of the limiting cavity (513) is movably sleeved with an abutment ring (516), the linkage pad (522) is movably sleeved on the upper end of the inner cavity of the limiting cavity (513), and a plurality of evenly distributed reset mechanisms are provided between the abutment ring (516) and the linkage pad (522).

10. A rotary reversing valve according to claim 9, characterized in that: The reset mechanism comprises a limit tube (514) fixedly connected to the top of the linkage pad (522); a linkage slide rod (515) is movably sleeved inside the limit tube (514); the upper end of the linkage slide rod (515) passes through the limit tube (514) and is fixedly connected to the bottom of the abutment ring (516); a reset spring (517) is arranged on the outer side of the limit tube (514); and the two ends of the reset spring (517) are respectively fixedly connected to the abutment ring (516) and the linkage pad (522).

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