Fluid reversing valve and fluid reversing equipment

Abstract

The present application provides a fluid reversing valve and a fluid reversing device, which relate to the technical field of reversing valves. The fluid reversing valve includes a valve sleeve and a valve core; the valve core is rotatably accommodated in the accommodating chamber of the valve sleeve; in the valve sleeve and the valve core, when the first through hole is connected to the first working port, the pressure port, the third through hole, the center hole, the first through hole and the first working port form a first channel, and the second working port, the second return port and the valve core form a second channel; when the second through hole is connected to the second working port, the pressure port, the third through hole, the center hole, the second through hole, the second working port are used to form a third channel, and the first working port and the first return port form a fourth channel. In this solution, the fluid reversing valve includes a valve sleeve, a valve core and a plug, has few parts, is easy to disassemble and assemble, can achieve high-pressure and high-frequency reversing, and has a long service life.

Description

Technical Field

[0001] The present invention relates to the technical field of reversing valves, and in particular to a fluid reversing valve and a fluid reversing device. Background Art

[0002] In the field of hydraulic control and other fluid control, there is a need to switch fluid flow channels. Directional valves are used to achieve this switching. Currently, there are two types of directional valves: those with sliding spools and those with rotating spools. Sliding spools are less commonly used for high-frequency switching under high pressure. Rotating spools, on the other hand, have numerous components, making them difficult to disassemble and assemble, or they can suffer from spool overload, which can shorten their service life. Summary of the Invention

[0003] The present application provides a fluid reversing valve and a fluid reversing device, which can meet the needs of high-pressure and high-frequency reversing, simplify the components of the reversing valve, improve the unbalanced load phenomenon and increase the service life.

[0004] In order to achieve the above objectives, the technical solutions provided in the embodiments of the present application are as follows:

[0005] In a first aspect, an embodiment of the present application provides a fluid reversing valve, the fluid reversing valve comprising a valve sleeve and a valve core;

[0006] The valve core is rotatably accommodated in the accommodating chamber of the valve sleeve, and the accommodating chamber passes through the first end and the second end of the valve sleeve;

[0007] The side wall of the valve sleeve is provided with a pressure port, a first working port, a second working port, a first return port and a second return port, all of which are in communication with the accommodating chamber;

[0008] An axial center hole is formed at one end of the valve core, the valve core includes a plug for sealing an opening of the center hole, and a side wall of the valve core is formed with a first through hole, a second through hole, and a third through hole communicating with the center hole;

[0009] The first through hole cooperates with the first working port. When the first through hole is connected to the first working port, the second through hole is not connected to the second working port. The pressure port, the third through hole, the center hole, the first through hole and the first working port form a first channel, and the second working port, the second return port and the valve core form a second channel.

[0010] The second through hole cooperates with the second working port. When the second through hole is connected to the second working port, the first through hole is not connected to the first working port. The pressure port, the third through hole, the center hole, the second through hole, and the second working port are used to form a third channel, and the first working port and the first return port form a fourth channel.

[0011] When the valve core rotates relative to the valve sleeve, the first channel and the third channel are switched with each other, and the second channel and the fourth channel are switched with each other.

[0012] In the above-described embodiment, the reversing valve comprises a valve sleeve, a valve core, and a plug, with a small number of components and easy assembly and disassembly. Furthermore, the central hole of the valve core serves as a high-pressure fluid channel, while the guide grooves radially along the valve core serve as low-pressure fluid channels. The entire valve core is not subject to radial pressure differentials, thus preventing unbalanced loading. Furthermore, when the valve core rotates, unbalanced loading is reduced, enabling high-pressure, high-frequency reversing and a long service life.

[0013] In combination with the first aspect, in some optional embodiments, a first annular groove communicating with the pressure port and the third through hole is formed on a sidewall of the valve core; a first guide groove is formed in a radial portion of the valve core where the first through hole is located; and a second guide groove is formed in a radial portion of the valve core where the second through hole is located; and a second radial annular groove and a third radial annular groove are formed in the accommodating chamber of the valve sleeve.

[0014] The second annular groove is connected to the first reflux port and the first guide groove, and is used to form the fourth channel when the first working port is connected to the first guide groove;

[0015] The third annular groove is in communication with the second return port and the second guide groove, and is configured to form the second channel when the second working port is in communication with the second guide groove.

[0016] In the above embodiment, the first annular groove maintains communication between the pressure port and the center hole during valve core rotation; the second annular groove cooperates with the first return port and the first guide groove to form a fourth channel, and the third annular groove cooperates with the second return port and the second guide groove to form a second channel. During valve core rotation, switching between the fourth channel and the second channel is possible.

[0017] In combination with the first aspect, in some optional embodiments, the number of the first guide grooves is two and they are distributed radially of the valve core, the number of the second guide grooves is two and they are distributed radially of the valve core, and they do not overlap with the projections of the two first guide grooves on the radial cross-section of the valve core.

[0018] In the above embodiment, there are two first guide grooves and two second guide grooves, which helps to increase the frequency of channel reversal during the rotation of the valve core.

[0019] In combination with the first aspect, in some optional embodiments, the fluid reversing valve further includes a first bearing and a second bearing, the first bearing and the second bearing are respectively sleeved on both ends of the valve core, the first end of the valve sleeve is provided with a first fixing groove for accommodating the first bearing, and the second end of the valve sleeve is provided with a second fixing groove for accommodating the second bearing.

[0020] In the above embodiment, the first bearing and the second bearing can reduce the wear and friction of the valve core, which is beneficial to increasing the service life and switching frequency of the valve core.

[0021] In combination with the first aspect, in some optional embodiments, the fluid reversing valve further includes a first end cover and a second end cover, the first end cover being provided with a through hole for one end of the valve core to pass through and be exposed, the first end cover being used to cover the opening portion of the first end of the valve sleeve; the second end cover being used to cover the opening portion of the second end of the valve sleeve.

[0022] In combination with the first aspect, in some optional embodiments, leakage holes are provided in both the first end cover and the second end cover.

[0023] In combination with the first aspect, in some optional embodiments, a connecting hole connecting the first fixing groove and the second fixing groove is opened in the inner wall of the valve sleeve, and a leakage port is opened in the second end cover.

[0024] In combination with the first aspect, in some optional embodiments, the fluid reversing valve further includes a sealing member, and the sealing member is arranged at the connection between the first end cover and the valve core.

[0025] In combination with the first aspect, in some optional embodiments, the valve sleeve has a prismatic structure.

[0026] In combination with the second aspect, the present application also provides a fluid reversing device, which includes: an electric motor and the above-mentioned fluid reversing valve, wherein the rotating shaft of the electric motor is connected to one end shaft of the valve core of the fluid reversing valve to drive the valve core to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and should not be considered as limiting the scope. Those skilled in the art can also derive other relevant drawings based on these drawings without inventive effort.

[0028] Figure 1 A schematic structural diagram of the fluid reversing valve provided in an embodiment of the present application.

[0029] Figure 2 for Figure 1 Schematic diagram of the AA section of the middle valve sleeve.

[0030] Figure 3 for Figure 1 Schematic diagram of the BB section of the middle valve sleeve.

[0031] Figure 4 A schematic structural diagram of the valve core in the fluid reversing valve provided in an embodiment of the present application.

[0032] Figure 5 for Figure 4 Schematic diagram of the CC section.

[0033] Figure 6 for Figure 4 Schematic diagram of the DD section.

[0034] Figure 7 for Figure 1 One of the schematic diagrams of the AA section of the medium fluid reversing valve.

[0035] Figure 8 for Figure 1 Schematic diagram of the AA section of the medium fluid reversing valve (part 2).

[0036] Icons: 100-fluid reversing valve; 6-seal; 7-plug; 10-valve sleeve; 11-pressure port; 12-first working port; 13-second working port; 14-first return port; 15-second return port; 16-second annular groove; 17-third annular groove; 18-connecting hole; 20-valve core; 21-first guide groove; 22-second guide groove; 23-center hole; 24-third through hole; 25-first annular groove; 26-first through hole; 27-second through hole; 28-keyway; 31-first bearing; 32-second bearing; 40-first end cover; 50-second end cover; 51-leakage port. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings. It should be noted that the terms "first", "second", etc. are only used to distinguish and describe, and cannot be understood as indicating or implying relative importance.

[0038] The following embodiments of the present application are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0039] Please refer to Figure 1 , an embodiment of the present application provides a fluid reversing valve 100, which can be used to switch the channels of the fluid. It can be understood that the fluid reversing valve 100 can be used in devices or scenarios such as vibratory hammers and diaphragm compressors, which need to switch the channels for conveying fluids. For example, the fluid reversing valve 100 can be used in devices or scenarios with high pressure and high frequency reversing. The fluid can be, but is not limited to, gas or liquid. For example, the fluid can be a liquid such as water or oil. The gas is usually a compressed gas, for example, compressed air or other gas.

[0040] Please refer to Figures 2 to 6 ,in, Figure 2 Can be understood as Figure 1 A cross-sectional view of the middle valve sleeve 10 along the line AA. Figure 3 Can be understood as Figure 1 Cross-sectional view of the middle valve sleeve 10B-B section. Figure 5 Can be understood as Figure 4 Cross-sectional view of the middle valve core 20C-C section. Figure 6 Can be understood as Figure 4 Cross-sectional view of the middle valve core 20D-D. Section AA is perpendicular or nearly perpendicular to section BB. Section CC is perpendicular or nearly perpendicular to section DD.

[0041] In this embodiment, the fluid reversing valve 100 may include a valve sleeve 10 and a valve core 20. The valve core 20 may be an axial structure and rotatably accommodated in a receiving chamber of the valve sleeve 10, which passes through the first end and the second end of the valve sleeve 10.

[0042] It can be understood that the first end and the second end of the valve sleeve 10 are two opposite ends of the valve sleeve 10. For example, the first end of the valve sleeve 10 can be Figure 2 The left end of the valve sleeve 10 is Figure 2 The right end of the .

[0043] Please refer to Figure 1 and Figure 2 The side wall of the valve sleeve 10 is provided with a pressure port 11, a first working port 12, a second working port 13, a first return port 14 and a second return port 15, all of which are connected to the accommodating chamber.

[0044] Please refer to the following figure Figures 4 to 6 An axial center hole 23 is formed at one end of the valve core 20, and the valve core 20 includes a plug 7 for sealing the opening of the center hole 23. A first through hole 26, a second through hole 27 and a third through hole 24 are formed on the side wall of the valve core 20 and are connected to the center hole 23.

[0045] Please refer to Figure 1 and Figure 7 , Figure 7 Can be understood as Figure 1 In the cross-sectional view of the middle fluid reversing valve at section AA, the first through hole 26 cooperates with the first working port 12. When the first through hole 26 is connected to the first working port 12, the second through hole 27 is not connected to the second working port 13. The pressure port 11, the third through hole 24, the center hole 23, the first through hole 26 and the first working port 12 form a first channel, and the second working port 13, the second return port 15 and the valve core 20 form a second channel.

[0046] Please refer to Figure 1 and Figure 8 , Figure 8 Can be understood as Figure 7 After the valve core 20 rotates 90 degrees, based on Figure 1 A cross-sectional view of the middle fluid reversing valve along section AA shows that the second through hole 27 cooperates with the second working port 13. When the second through hole 27 is connected to the second working port 13, the first through hole 26 is not connected to the first working port 12. The pressure port 11, the third through hole 24, the center hole 23, the second through hole 27, and the second working port 13 are used to form a third channel, and the first working port 12 and the first return port 14 form a fourth channel.

[0047] When the valve core 20 rotates relative to the valve sleeve 10 , the first channel and the third channel are switched with each other, and the second channel and the fourth channel are switched with each other.

[0048] In this embodiment, the pressure port 11 can serve as an input port for the fluid. Generally speaking, the pressure port 11 can be used to deliver high-pressure fluid provided by the outside to the central hole 23 of the valve core 20. The first channel cooperates with the second channel. The first channel can serve as an input channel for the high-pressure fluid. The pressure port 11 can serve as the inlet of the first channel and can be connected to the interface of the device for providing fluid input from the outside (such as the outlet of a hydraulic pump); the first working port 12 can serve as the outlet of the first channel and can be connected to the input port of the working device (usually including two working ports, one working port as an input port and one working port as an output port, such as a diaphragm compressor). The second channel can serve as an output channel for the fluid, wherein the second working port 13 can serve as the inlet of the second channel and can be connected to the output port of the working device; the second reflux port 15 can serve as the outlet of the second channel, and the output fluid can be delivered to a container so that the device for providing fluid input can input the fluid in the container into the first channel or the third channel. Based on this, a fluid circulation can be formed. Generally speaking, after the high-pressure fluid transported by the first channel works on the working equipment (such as actuating the diaphragm of a diaphragm compressor to shrink and deform), the high-pressure fluid will become a low-pressure fluid and then flow back through the second channel.

[0049] Similarly, the third channel and the fourth channel cooperate, with the third channel serving as an input channel for high-pressure fluid, and the fourth channel serving as an output channel for the fluid. The third channel has a similar structure, shape, and operating principle to the first channel, while the fourth channel has a similar structure, shape, and operating principle to the second channel. The third and fourth channels can be used to form another fluid circulation.

[0050] Please refer to Figure 8 The plug 7 can block the opening of the center hole 23 to prevent the fluid in the center hole 23 from leaking from the opening of the center hole 23, thereby improving the sealing effect of the opening of the center hole 23. The plug 7 can adopt different structures according to different working pressures and can be set according to actual needs.

[0051] In this embodiment, the reversing valve comprises a valve sleeve 10, a valve core 20, and a plug 7, resulting in a minimal number of components and ease of manufacturing, processing, and assembly / disassembly. Furthermore, the central hole 23 of the valve core 20 serves as a high-pressure fluid channel, while the guide grooves in the radial portion of the valve core 20 serve as low-pressure fluid channels. The valve core 20 as a whole is not subject to radial pressure differentials, thus preventing unbalanced loading. Furthermore, when the valve core 20 rotates, the valve core 20 and the valve sleeve 10 maintain good concentricity, which mitigates unbalanced loading, thereby reducing wear on the valve core 20 and the valve sleeve 10 and extending the service life of the fluid reversing valve 100.

[0052] As an optional implementation, please refer to Figures 4 to 8 The sidewall of the valve core 20 is provided with a first annular groove 25 that communicates with the pressure port 11 and the third through hole 24. A first guide groove 21 is provided in the radial portion of the valve core 20 where the first through hole 26 is located, and a second guide groove 22 is provided in the radial portion of the valve core 20 where the second through hole 27 is located. A second annular groove 16 and a third annular groove 17 are provided in the accommodating chamber of the valve sleeve 10. The second annular groove 16 communicates with the first return port 14 and the first guide groove 21, forming a fourth channel when the first working port 12 is in communication with the first guide groove 21. The third annular groove 17 communicates with the second return port 15 and the second guide groove 22, forming a second channel when the second working port 13 is in communication with the second guide groove 22.

[0053] Understandably, as the valve core 20 rotates relative to the valve sleeve 10, the first annular groove 25 maintains constant communication between the pressure port 11 and the third through hole 24, thereby maintaining constant communication between the pressure port 11 and the center hole 23. This ensures that the pressure of the high-pressure fluid stored in the center hole 23 remains unchanged during operation of the fluid reversing valve 100 due to the rotation of the valve core 20, allowing for continuous output of the high-pressure fluid through the first or third passages.

[0054] Please refer to Figure 8When the valve core 20 rotates relative to the valve sleeve 10, the first return port 14 on the valve sleeve 10 can always communicate with the first guide groove 21 through the second annular groove 16, while the first guide groove 21 is not necessarily connected to the first working port 12. When the valve core 20 rotates until the first guide groove 21 is connected to the first working port 12, the first working port 12, the first guide groove 21, the second annular groove 16, and the first return port 14 form a connected fourth channel. At the same time, the second working port 13 is connected to the second through hole 27, the second working port 13 is not connected to the second guide groove 22, and the first working port 12 is not connected to the first through hole 26. In other words, the third channel is connected, and neither the first channel nor the second channel is connected.

[0055] Please refer to Figure 7 When the valve core 20 rotates until the second guide groove 22 connects to the second working port 13, the second working port 13, the second guide groove 22, the third annular groove 17, and the second return port 15 form a connected second channel. Simultaneously, the first working port 12 connects to the first through-hole 26, the second working port 13 does not connect to the second through-hole 27, and the first working port 12 does not connect to the first guide groove 21. In other words, the first channel connects, while the third and fourth channels do not. In this way, as the valve core 20 rotates relative to the valve sleeve 10, the first and third channels can be switched between, as well as the second and fourth channels can be switched between.

[0056] In this embodiment, the first through hole 26 can be a through hole on the valve core 20 that communicates with the center hole 23 but does not penetrate the valve core 20; the second through hole 27 can be a through hole on the valve core 20 that communicates with the center hole 23 but does not penetrate the valve core 20. In this case, the valve core 20 can switch between the first channel and the third channel, and between the second channel and the fourth channel once every rotation of the valve core 20.

[0057] Of course, in other embodiments, the first through hole 26 can be a through hole on the valve core 20 that communicates with the center hole 23 and penetrates the valve core 20; the second through hole 27 can be a through hole on the valve core 20 that communicates with the center hole 23 and penetrates the valve core 20. Furthermore, the number of the first guide grooves 21 and the number of the second guide grooves 22 are both two. In this case, the valve core 20 can achieve four channel switchings every time it rotates one circle relative to the valve sleeve 10.

[0058] As an optional embodiment, the number of first guide grooves 21 is two and they are distributed radially in the valve core 20, the number of second guide grooves 22 is two and they are distributed radially in the valve core 20, and they do not overlap with the projections of the two first guide grooves 21 on the radial section of the valve core 20.

[0059] In this embodiment, the first working port 12 and the second working port 13 can be arranged on the same axis of the valve sleeve 10, and the first return port 14 and the second return port 15 can be arranged on another axis of the valve sleeve 10. The projections of the openings of the first working port 12 and the second working port 13, and the openings of the first return port 14 and the second return port 15 on the radial cross section of the sleeve do not overlap. The position of the pressure port 11 on the sleeve, the position of the first annular groove 25 on the valve core 20, and the position of the third through hole 24 on the valve core 20 can be set according to actual conditions, as long as the pressure port 11 can communicate with the center hole 23 through the first annular groove 25 and the third through hole 24.

[0060] For example, please refer to Figure 1 and Figure 7 ,exist Figure 1 In the embodiment, the first return port 14 and the second return port 15 are arranged on the top layer of the valve sleeve 10, the pressure port 11 is arranged between the first return port 14 and the second return port 15, and the first working port 12 and the second working port 13 are arranged on the bottom side of the valve sleeve 10 (i.e., on the opposite sides of the first return port 14 and the second return port 15). The two first guide grooves 21 can be arranged axially symmetrically on the valve core 20, and the two second guide grooves 22 can be arranged axially symmetrically on the valve core 20. The projection of the center line of the first through hole 26 and the second through hole 27 on the radial cross section of the valve core 20 is perpendicular or nearly perpendicular. The projection of the center line of the first through hole 26 and the center connecting line of the two first guide grooves 21 on the radial cross section of the valve core 20 is perpendicular or nearly perpendicular. The projection of the center line of the second through hole 27 and the center connecting line of the two second guide grooves 22 on the radial cross section of the valve core 20 is perpendicular or nearly perpendicular. The projection of the center connecting line of the two first guide grooves 21 and the center line of the two second guide grooves 22 on the radial section of the valve core 20 is perpendicular or nearly perpendicular. In this way, the valve core 20 can switch the channel once every 90° rotation relative to the valve sleeve 10.

[0061] Of course, in other embodiments, the positions of the first working port 12 and the second working port 13 on the valve sleeve 10 can be set according to actual conditions and are not specifically limited here. For example, the first working port 12 and the second working port 13 can be set on a side of the valve sleeve 10.

[0062] In the above embodiment, there are two first guide grooves 21 and two second guide grooves 22 , which helps to increase the frequency of channel switching during the rotation of the valve core 20 .

[0063] As an optional implementation, please refer to Figure 8The fluid reversing valve further includes a first bearing 31 and a second bearing 32. The first bearing 31 and the second bearing 32 are respectively sleeved on both ends of the valve core 20. A first fixing groove for accommodating the first bearing 31 is defined at the first end of the valve sleeve 10, and a second fixing groove for accommodating the second bearing 32 is defined at the second end of the valve sleeve 10.

[0064] In this embodiment, the first fixing groove can be used to accommodate and fix the first bearing 31, and the second fixing groove can be used to accommodate and fix the second bearing 32. It can be understood that the bearings (first bearing 31, second bearing 32) include an inner ring and an outer ring. The inner ring is used to be sleeved on one end of the valve core 20, and the outer ring is used to be fixed in the fixing groove. When the valve core 20 rotates, the inner ring of the bearing will not rotate relative to the valve core 20, and the outer ring of the bearing will not rotate relative to the valve sleeve 10. Among them, the method of fixing the bearing can be selected according to actual conditions. For example, the inner ring of the bearing and the valve core 20 are overfitted, and the outer ring of the bearing and the fixing groove of the valve sleeve 10 are clearance-fitted to achieve the fixing of the bearing. In this way, the outer ring of the bearing can be prevented from rotating relative to the valve sleeve 10, and the inner ring of the bearing can be prevented from rotating relative to the valve core 20.

[0065] After the first and second bearings 31 and 32 are installed, a gap can exist between the valve core 20 and the valve sleeve 10. This gap fit prevents contact between the valve core 20 and the valve sleeve 10, which could increase wear. The thickness of this gap can be relatively thin to reduce leakage. For example, the gap thickness can be in the range of 5-50 microns, with this gap being a reasonable minimum. Understandably, the first and second bearings 31 and 32 can reduce wear on the valve core 20, thereby increasing its service life and switching frequency.

[0066] As an optional embodiment, the fluid reversing valve also includes a first end cover 40 and a second end cover 50. The first end cover 40 is provided with a through hole for one end of the valve core 20 to pass through and be exposed. The first end cover 40 is used to cover the opening portion of the first end of the valve sleeve 10; the second end cover 50 is used to cover the opening portion of the second end of the valve sleeve 10.

[0067] In this embodiment, due to the gap between the valve sleeve 10 and the valve core 20, some fluid may leak out of the valve sleeve 10 through this gap when fluid is input through the pressure port 11. The first end cap 40 and the second end cap 50 respectively cover the openings at both ends of the valve sleeve 10, thereby forming a relatively closed chamber within the valve sleeve 10 to store any leaked fluid. The through hole provided in the first end cap 40 allows the valve core 20 to be connected to the motor shaft, thereby facilitating rotation of the valve core 20 via the motor shaft.

[0068] As an optional implementation, leakage ports are provided in both the first end cover 40 and the second end cover 50 .

[0069] Understandably, during operation of the fluid reversing valve, after the first end cap 40 and the second end cap 50 cover the opening of the valve sleeve 10, leaked fluid will continuously accumulate in the accommodating chamber of the valve sleeve 10. As the volume of fluid increases, the pressure in the accommodating chamber of the valve sleeve 10 tends to increase, thereby affecting the operation of the fluid reversing valve 100. By providing leakage ports in both the first end cap 40 and the second end cap 50, leaked fluid from the chambers at both ends of the valve sleeve 10 can be promptly discharged, preventing the formation of high-pressure fluid in the chambers at both ends of the valve sleeve 10.

[0070] In this embodiment, the leakage ports on the first end cap 40 and the second end cap 50 can be connected to corresponding pipes. Through the pipes, the leaked fluid can be transported to a designated container for storage.

[0071] As an optional implementation, please refer to Figure 3 The inner wall of the valve sleeve 10 is provided with a connecting hole 18 connecting the first fixing groove and the second fixing groove, and the second end cover 50 is provided with a leakage port 51.

[0072] In this embodiment, the number of the connecting holes 18 can be one or more, and can be set according to actual conditions. After the connecting holes 18 are provided, the fluid leaked in the chambers at both ends of the valve sleeve 10 can be in a state of pressure balance, and then the leaked fluid can be discharged through the leakage port 51. In this way, a leakage port can be opened in only one of the first end cover 40 and the second end cover 50. For example, a leakage port can be opened in the first end cover 40, or in the second end cover 50. Since an electric motor is usually required to be installed on this side of the first end cover 40 of the valve sleeve 10, it is not convenient to connect a pipeline to discharge the leaked fluid from the first end cover 40. Therefore, a leakage port 51 can be opened in the second end cover 50. In this way, the installation and use of the fluid reversing valve are facilitated.

[0073] As an optional implementation, please refer to Figure 4 The valve core 20 can be provided with a keyway 28 at one end away from the opening of the central hole 23. The valve core 20 can be directly or indirectly connected to the rotating shaft of the motor through a coupling and a flat key through the keyway 28.

[0074] As an optional implementation, please refer to Figure 7 The fluid reversing valve 100 further includes a sealing member 6 , which is disposed at the connection between the first end cover 40 and the valve core 20 .

[0075] In this embodiment, the seal 6 is typically a rotary oil seal. Within the accommodating chamber of the valve sleeve 10, fluid typically leaks through the gap between the valve core 20 and the valve sleeve 10. When the motor shaft is connected to one end of the valve core 20, a gap forms between the valve core 20 and the opening of the first end cap 40. The seal 6, located at the connection between the valve core 20 and the first end cap 40, prevents fluid from leaking out of the accommodating chamber of the valve sleeve 10, preventing the fluid from leaking through the gap between the valve core 20 and the first end cap 40.

[0076] As an optional embodiment, the valve sleeve 10 is a prismatic structure. For example, the valve sleeve 10 can be as follows Figure 1 As shown, it is in the shape of a quadrangular prism. The prismatic valve sleeve 10 is beneficial for increasing the contact area between the valve sleeve 10 and the contact plane, and is easy to install and fix. Of course, in other embodiments, the valve sleeve 10 can be cylindrical or other prismatic structures, which are not specifically limited here.

[0077] The present invention also provides a fluid reversing device, which may include a motor and the fluid reversing valve 100 , wherein the motor's shaft is connected to one end of the valve core 20 of the fluid reversing valve 100 to drive the valve core 20 to rotate.

[0078] For example, the motor shaft can be connected to one end of the valve core 20 provided with a keyway 28. The fluid reversing valve 100 can be fixed by screws or bolts, and the motor can drive the valve core 20 to rotate relative to the valve sleeve 10 via the shaft to switch the fluid channel.

[0079] In summary, the present application provides a fluid reversing valve and a fluid reversing device. The fluid reversing valve includes a valve sleeve and a valve core; the valve core is rotatably accommodated in a housing chamber of the valve sleeve, and the housing chamber passes through the first end and the second end of the valve sleeve; the side wall of the valve sleeve is provided with a pressure port, a first working port, a second working port, a first return port and a second return port, all of which are connected to the housing chamber; an axial center hole is provided at one end of the valve core, and the valve core includes a plug for sealing the opening of the center hole, and the side wall of the valve core is provided with a first through hole, a second through hole and a third through hole connected to the center hole; the first through hole cooperates with the first working port, and when the first through hole is connected to the first working port, the second through hole is connected to the second working port. The working ports are not connected, the pressure port, the third through hole, the center hole, the first through hole and the first working port form a first channel, and the second working port, the second return port and the valve core form a second channel; the second through hole cooperates with the second working port, and when the second through hole is connected to the second working port, the first through hole is not connected to the first working port, the pressure port, the third through hole, the center hole, the second through hole and the second working port are used to form a third channel, and the first working port and the first return port form a fourth channel; wherein, when the valve core rotates relative to the valve sleeve, the first channel and the third channel are switched with each other, and the second channel and the fourth channel are switched with each other. In this solution, the fluid reversing valve includes a valve sleeve, a valve core and a plug, with few parts and easy disassembly and assembly. In addition, the center hole of the valve core can be used as a high-pressure fluid channel, and the guide groove in the radial part of the valve core is used as a low-pressure fluid channel. The valve core as a whole is not subject to radial pressure difference, so no eccentric load is generated. Furthermore, when the valve core rotates, the eccentric load phenomenon can be improved, thereby reducing the wear of the valve core and the valve sleeve to increase the service life of the fluid reversing valve.

[0080] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A fluid reversing valve, characterized in that: The fluid reversing valve includes a valve sleeve and a valve core; The valve core is rotatably accommodated in the accommodating chamber of the valve sleeve, and the accommodating chamber passes through the first end and the second end of the valve sleeve; The side wall of the valve sleeve is provided with a pressure port, a first working port, a second working port, a first return port and a second return port, all of which are in communication with the accommodating chamber; An axial center hole is formed at one end of the valve core, the valve core includes a plug for sealing an opening of the center hole, and a side wall of the valve core is formed with a first through hole, a second through hole, and a third through hole communicating with the center hole; The first through hole cooperates with the first working port. When the first through hole is connected to the first working port, the second through hole is not connected to the second working port. The pressure port, the third through hole, the center hole, the first through hole and the first working port form a first channel, and the second working port, the second return port and the valve core form a second channel. The second through hole cooperates with the second working port. When the second through hole is connected to the second working port, the first through hole is not connected to the first working port. The pressure port, the third through hole, the center hole, the second through hole, and the second working port are used to form a third channel, and the first working port and the first return port form a fourth channel. Wherein, when the valve core rotates relative to the valve sleeve, the first channel and the third channel are switched with each other, and the second channel and the fourth channel are switched with each other; A first annular groove communicating with the pressure port and the third through hole is provided on the side wall of the valve core; a first guide groove is provided at a radial portion of the valve core where the first through hole is located, and a second guide groove is provided at a radial portion of the valve core where the second through hole is located; a second annular groove and a third annular groove are provided in a radial direction in the accommodating chamber of the valve sleeve; The second annular groove is connected to the first reflux port and the first guide groove, and is used to form the fourth channel when the first working port is connected to the first guide groove; The third annular groove is in communication with the second return port and the second guide groove, and is used to form the second channel when the second working port is in communication with the second guide groove; The fluid reversing valve also includes a first bearing and a second bearing, the first bearing and the second bearing are respectively sleeved on both ends of the valve core, the first end of the valve sleeve is provided with a first fixing groove for accommodating the first bearing, and the second end of the valve sleeve is provided with a second fixing groove for accommodating the second bearing.

2. The fluid reversing valve according to claim 1, characterized in that: There are two first guide grooves distributed in the radial direction of the valve core, and there are two second guide grooves distributed in the radial direction of the valve core, and the projections of the two first guide grooves on the radial cross section of the valve core do not overlap.

3. The fluid reversing valve according to claim 1, characterized in that: The fluid reversing valve also includes a first end cover and a second end cover. The first end cover is provided with a through hole for one end of the valve core to pass through and be exposed. The first end cover is used to cover the opening of the first end of the valve sleeve; the second end cover is used to cover the opening of the second end of the valve sleeve.

4. The fluid reversing valve according to claim 3, characterized in that: The first end cover and the second end cover are both provided with leakage ports.

5. The fluid reversing valve according to claim 3, characterized in that: A communication hole communicating with the first fixing groove and the second fixing groove is formed in the inner wall of the valve sleeve, and a leakage port is formed in the second end cover.

6. The fluid reversing valve according to claim 3, characterized in that: The fluid reversing valve further includes a sealing member, which is arranged at the connection between the first end cover and the valve core.

7. The fluid reversing valve according to claim 1, characterized in that: The valve sleeve has a prismatic structure.

8. A fluid reversing device, characterized in that: The fluid reversing device comprises: an electric motor and a fluid reversing valve according to any one of claims 1 to 7, wherein the rotating shaft of the electric motor is connected to one end shaft of the valve core of the fluid reversing valve to drive the valve core to rotate.

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