Ball valve

Abstract

Disclosed is a ball valve, comprising a valve seat (10), an opening and closing member (20), a valve rod (30), a first memory alloy member (40a), a second memory alloy member (40b), and a power supply device (51), wherein the valve seat (10) has a valve cavity and a first flow port (11) and a second flow port (12) which are in communication with the valve cavity; the opening and closing member (20) is mounted in the valve cavity; one end of the valve rod (30) is connected to the opening and closing member (20), and the first memory alloy member (40a) and the second memory alloy member (40b) are both connected to the other end of the valve rod (30) by means of a transmission mechanism; the power supply device (51) can form a first circuit loop with the first memory alloy member (40a), such that the transmission mechanism drives the valve rod (30) to rotate in a first direction, and a communication cavity (21) of the opening and closing member (20) is in communication with the first flow port (11) and the second flow port (12); and the power supply device (51) can also form a second circuit loop with the second memory alloy member (40b), such that the transmission mechanism drives the valve rod (30) to rotate in a second direction, and the communication cavity (21) of the opening and closing member (20) is disconnected from the first flow port (11) and the second flow port (12). The whole process does not require motor drive, and less noise is generated during the operation process.

Description

ball valve

[0001] This disclosure claims priority to Chinese patent application number 202311169145.X, filed on September 11, 2023, and entitled “Ball Valve”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to a ball valve. Background Art

[0003] In the related art, electric ball valves are driven by motors to control the opening and closing of the ball valves. Such ball valves have a complex structure and generate a lot of noise during operation.

[0004] Summary of the Invention

[0005] The present invention aims to provide a ball valve to simplify the structure of the ball valve and reduce noise during operation.

[0006] Based on the above objectives, according to one aspect of the present disclosure, a ball valve is provided, comprising a valve seat, an opening and closing member, a valve stem, a first memory alloy member, a second memory alloy member, and a power supply device, wherein the valve seat has a valve cavity and a first flow port and a second flow port communicating with the valve cavity, the opening and closing member is installed in the valve cavity, one end of the valve stem is connected to the opening and closing member, and the first memory alloy member and the second memory alloy member are both connected to the other end of the valve stem via a transmission mechanism;

[0007] The power supply device can form a first circuit loop with the first memory alloy component, so that the transmission mechanism drives the valve stem to rotate in a first direction, and the communicating cavity of the opening and closing component is connected with the first flow port and the second flow port; the power supply device can also form a second circuit loop with the second memory alloy component, so that the transmission mechanism drives the valve stem to rotate in a second direction, and the communicating cavity of the opening and closing component is isolated from the first flow port and the second flow port, wherein the second direction is opposite to the first direction.

[0008] According to one embodiment of the present disclosure, the transmission mechanism includes a gear and a rack; the gear is connected to the valve stem, the rack is engaged with the gear, one end of the first memory alloy part is fixedly connected to one end of the rack, the other end of the first memory alloy part is fixedly connected to the valve seat, one end of the second memory alloy part is fixedly connected to the other end of the rack, and the other end of the second memory alloy part is fixedly connected to the valve seat.

[0009] According to one embodiment of the present disclosure, at least one of the first memory alloy part and the second memory alloy part is a wound reed, one end of the wound reed located on the outside is fixedly connected to the rack, and one end of the wound reed located on the inside is fixedly connected to the valve seat through a central fixed shaft.

[0010] According to one embodiment of the present disclosure, at least one of the first memory alloy component and the second memory alloy component is a straight plate-shaped spring, one end of which is fixedly connected to the rack, and the other end of which is fixedly connected to the valve seat.

[0011] According to one embodiment of the present disclosure, the valve stem includes a first sub-valve stem and a second sub-valve stem connected to each other, the end of the first sub-valve stem away from the second sub-valve stem is connected to the opening and closing member, and the gear is installed between the first sub-valve stem and the second sub-valve stem.

[0012] According to one embodiment of the present disclosure, the ball valve further includes a limiter connected to the valve stem; the valve seat is provided with a stopper, and the limiter can abut against the stopper to limit the rotation angle of the valve stem.

[0013] According to one embodiment of the present disclosure, the limiting member is a plate-shaped structure, and is provided with a mounting hole. The mounting hole cooperates with the valve stem through a circumferential limiting structure to limit the circumferential rotation of the limiting member relative to the valve stem.

[0014] The stop portion has a first stop surface and a second stop surface, the limit member has an arc-shaped protrusion, the arc-shaped protrusion has a first end and a second end, the end surface of the first end is configured to abut against the first stop surface when the valve stem rotates along the first direction; the end surface of the second end is configured to abut against the second stop surface when the valve stem rotates along the second direction.

[0015] According to one embodiment of the present disclosure, the ball valve further includes a switching device, which is used to enable the power supply device and the first memory alloy member to form the first circuit loop, or to enable the power supply device and the second memory alloy member to form the second circuit loop.

[0016] According to one embodiment of the present disclosure, the ball valve further includes a sealing cover connected to the valve seat, and a receiving space is provided on one side of the sealing cover close to the valve seat, wherein the first memory alloy component and the second memory alloy component are both located in the receiving space.

[0017] According to one embodiment of the present disclosure, the switch device includes a first operating portion and a second operating portion, wherein the first operating portion and the second operating portion are both located outside the cover;

[0018] The first operating part is electrically connected to one end of the first memory alloy part so that the power supply device and the first memory alloy part form the first circuit loop; or the second operating part is electrically connected to one end of the second memory alloy part so that the power supply device and the second memory alloy part form the second circuit loop.

[0019] According to one embodiment of the present disclosure, one end of the valve stem away from the opening and closing member is located outside the valve seat to form a manual operation end. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other features and advantages of the present disclosure will become more apparent by describing in detail example embodiments thereof with reference to the accompanying drawings.

[0021] FIG1 is a schematic structural diagram of a ball valve provided by one or more embodiments of the present disclosure;

[0022] FIG2 is a front view of a ball valve provided by one or more embodiments of the present disclosure;

[0023] FIG3 is a cross-sectional view taken along line BB of FIG2 ;

[0024] FIG4 is a partial enlarged view of point C in FIG3 ;

[0025] FIG5 is a schematic diagram of a partial internal structure of a ball valve in an open state provided by one or more embodiments of the present disclosure;

[0026] FIG6 is a top view of a portion of the structure of a ball valve in an open state provided by one or more embodiments of the present disclosure;

[0027] FIG7 is a schematic structural diagram of a first memory alloy component and a second memory alloy component in one or more embodiments of the present disclosure;

[0028] FIG8 is a schematic diagram of a ball valve in a closed state provided by one or more embodiments of the present disclosure;

[0029] FIG9 is a schematic diagram of a partial internal structure of a ball valve in a closed state provided by one or more embodiments of the present disclosure;

[0030] FIG10 is a top view of a portion of the structure of a ball valve in a closed state provided by one or more embodiments of the present disclosure;

[0031] FIG11 is a circuit diagram of a ball valve provided in accordance with one or more embodiments of the present disclosure.

[0032] The following are the descriptions of the reference numerals:

[0033] 10-valve seat; 11-first flow port; 12-second flow port; 13-stop portion; 131-first stop surface; 132-second stop surface; 14-threaded interface; 20-opening and closing member; 21-connecting cavity; 22-limiting groove; 221-straight groove wall; 30-valve stem; 31-first sub-valve stem; 311-mounting shaft; 312-flat rod portion; 3121-limiting surface; 32-second sub-valve stem; 320-limiting plane; 321-limiting Positioning member; 3211-arc-shaped protrusion; 3211a-first end; 3211b-second end; 40a-first memory alloy member; 40b-second memory alloy member; 51-power supply device; 52-switch device; 521-first operating part; 522-second operating part; 53-first wire; 54-second wire; 61-gear; 62-rack; 70-cover; 80-protective cap; 91-first connecting pipe; 92-second connecting pipe. DETAILED DESCRIPTION

[0034] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the illustrations to another component, these terms are used in this specification only for convenience, such as the orientation of the examples described in the accompanying drawings. It will be understood that if the device of the illustrations is flipped so that it is upside down, the component described as "upper" will become the component "lower". Other relative terms such as "top" and "bottom" are also used to have similar meanings. When a structure is "on" another structure, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0035] The terms "a", "an", "the" and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second", etc. are used only as labels and do not limit the quantity of their objects.

[0036] 1 to 11, this embodiment provides a ball valve, including a valve seat 10, an opening and closing member 20, a valve stem 30, a first memory alloy member 40a, a second memory alloy member 40b, and a power supply device 51. The valve seat 10 has a valve cavity and a first flow port 11 and a second flow port 12 communicating with the valve cavity. The opening and closing member 20 is installed in the valve cavity. One end of the valve stem 30 is connected to the opening and closing member 20. The first memory alloy member 40a and the second memory alloy member 40b are both connected to the other end of the valve stem 30 through a transmission mechanism. The power supply device 51 is provided. The device 51 can form a first circuit loop with the first memory alloy member 40a, so that the transmission mechanism drives the valve stem 30 to rotate in a first direction and connects the communication cavity 21 of the opening and closing member 20 with the first flow port 11 and the second flow port 12; the power supply device 51 can also form a second circuit loop with the second memory alloy member 40b, so that the transmission mechanism drives the valve stem 30 to rotate in a second direction and isolates the communication cavity 21 of the opening and closing member 20 from the first flow port 11 and the second flow port 12, wherein the second direction is opposite to the first direction. The first direction and the second direction can be two opposite linear directions, or two opposite rotational directions, for example, the first direction is clockwise and the second direction is counterclockwise.

[0037] Based on this structure, the ball valve provided in this embodiment utilizes the thermal contraction characteristics of the first memory alloy part 40a and the second memory alloy part 40b to drive the valve stem 30 to rotate in the first direction or the second direction to realize the opening or closing of the ball valve. The entire process does not require motor drive, the overall structure is relatively simple, and the noise during operation is relatively low.

[0038] When the ball valve needs to be opened, the power supply device 51 and the first memory alloy component 40a form a first circuit loop, utilizing the thermal effect of the current. When the current passes through the first memory alloy component 40a, the current does work and generates heat, causing the temperature of the first memory alloy component 40a to rise, and the first memory alloy component 40a to contract, causing the transmission mechanism to drive the valve stem 30 to rotate in the first direction, and to connect the connecting cavity 21 of the opening and closing component 20 with the first flow port 11 and the second flow port 12, thereby realizing the opening of the ball valve.

[0039] When the ball valve needs to be closed, the power supply device 51 and the second memory alloy component 40b form a second circuit loop, utilizing the thermal effect of the current. When the current passes through the second memory alloy component 40b, the current does work and generates heat, causing the temperature of the second memory alloy component 40b to rise and the second memory alloy component 40b to contract, causing the transmission mechanism to drive the valve stem 30 to rotate in a second direction, which is opposite to the first direction, and isolates the connecting cavity 21 of the opening and closing component 20 from the first flow port 11 and the second flow port 12, thereby achieving the closure of the ball valve.

[0040] When in use, the first flow port 11 is used to connect to the first connecting pipe 91 , and the second flow port 12 is used to connect to the second connecting pipe 92 . One of the first flow port 11 and the second flow port 12 is a fluid inlet, and the other is a fluid outlet.

[0041] Illustratively, in this embodiment, the power supply device 51 may be a battery, such as a button battery.

[0042] In one embodiment, as shown in FIG5 and FIG11, the ball valve further includes a switch device 52, which is used to enable the power supply device 51 to form a first circuit loop with the first memory alloy member 40a, or to enable the power supply device 51 to form a second circuit loop with the second memory alloy member 40b.

[0043] As shown in FIG11 , when the switch device 52 is connected to one end of the first memory alloy member 40 a, current flows from the positive electrode of the power supply device 51 through the first memory alloy member 40 a and back to the negative electrode of the power supply device 51, forming a first circuit loop.

[0044] When the switch device 52 is connected to one end of the second memory alloy member 40 b , current flows from the positive electrode of the power supply device 51 through the second memory alloy member 40 b and then returns to the negative electrode of the power supply device 51 , forming a second circuit loop.

[0045] In one embodiment, the ball valve further includes a temperature sensor (not shown in the figure) and a controller (not shown in the figure). When the switch device 52 is connected to one end of the first memory alloy component 40a, a first circuit loop is formed, and the temperature of the first memory alloy component 40a rises. When the temperature sensor detects that the temperature reaches the phase change temperature of the first memory alloy component 40a, a signal is sent to the controller, and the controller controls the switch device 52 to disconnect. At this time, the first circuit loop is disconnected.

[0046] By setting up the controller, the hardware foundation can be laid for subsequent access to the Internet of Things.

[0047] Exemplarily, the controller may be an MCU controller, for example, a 51 series single-chip microcomputer.

[0048] It should be noted that the switch device 52 may also be other types of switches, as long as it can realize the function of forming a first circuit loop with the power supply device 51 and the first memory alloy component 40a, or forming a second circuit loop with the power supply device 51 and the second memory alloy component 40b.

[0049] In one embodiment, referring to Figures 3 and 5, the transmission mechanism includes a gear 61 and a rack 62; the gear 61 is connected to the valve stem 30, the rack 62 is engaged with the gear 61, one end of the first memory alloy part 40a is fixedly connected to one end of the rack 62, the other end of the first memory alloy part 40a is fixedly connected to the valve seat 10, one end of the second memory alloy part 40b is fixedly connected to the other end of the rack 62, and the other end of the second memory alloy part 40b is fixedly connected to the valve seat 10.

[0050] For example, both ends of the rack 62 are provided with grooves. Taking the connection between the first memory alloy member 40a and the rack 62 as an example, one end of the first memory alloy member 40a is inserted into the groove, and the one end of the first memory alloy member 40a and the groove can be tightly matched. In order to prevent the one end of the first memory alloy member 40a from being disengaged from the groove, the groove can be a dovetail groove. The first memory alloy member 40a has protrusions on both sides. When the one end of the first memory alloy member 40a is inserted into the dovetail groove from one end, when the first memory alloy member 40a contracts, it will not fall out of the dovetail groove, thereby driving the rack 62 to move, and then driving the gear 61 and the valve stem 30 to rotate in the first direction, thereby opening the ball valve.

[0051] It should be understood that the transmission mechanism adopts the gear 61 and the rack 62 to cooperate, which can further simplify the structure and reduce the product's external dimensions. Of course, the transmission mechanism is not limited to the gear rack transmission mechanism.

[0052] In one embodiment, as shown in Figure 3, the valve stem 30 includes a first sub-valve stem 31 and a second sub-valve stem 32 connected to each other, and the end of the first sub-valve stem 31 away from the second sub-valve stem 32 is connected to the opening and closing member 20, and the gear 61 is installed between the first sub-valve stem 31 and the second sub-valve stem 32.

[0053] As shown in Figure 3, a mounting shaft 311 is provided at one end of the first sub-valve stem 31, and a gear 61 is sleeved on the mounting shaft 311. For example, the cross-section of the mounting shaft 311 can be an oblong, and the center hole of the gear 61 matches the cross-section of the mounting shaft 311. Of course, the mounting shaft 311 and the gear 61 can also be engaged by a key and keyway. The second sub-valve stem 32 is provided with a blind hole, the shape of which matches the cross-section of the mounting shaft 311. The mounting shaft 311 is restrained within the blind hole, and the gear 61 is positioned between the second sub-valve stem 32 and the first sub-valve stem 31, ensuring that the gear 61 drives the second sub-valve stem 32 to rotate together with the first sub-valve stem 31.

[0054] As shown in FIG4 , the other end of the first sub-valve stem 31 is formed with a flat rod portion 312 having two opposing stop surfaces 3121. The free end surface of the flat rod portion 312 is an arcuate surface. The opening and closing member 20 is in the shape of a hollow sphere, and the connecting cavity 21 of the opening and closing member 20 radially extends through both ends of the hollow sphere. A stop groove 22 is provided on the circumferential surface of the opening and closing member 20. The cross-sectional shape of the stop groove 22 matches the cross-sectional shape of the flat rod portion 312, and the bottom of the stop groove 22 is an arcuate surface that matches the free end surface of the flat rod portion 312. As shown in FIG4 , the stop groove 22 has two parallel straight groove walls 221. The flat rod portion 312 is located within the stop groove 22, and the two stop surfaces 3121 of the flat rod portion 312 respectively contact the straight groove wall 221 they are adjacent to, thereby ensuring that the opening and closing member 20 can rotate with the first sub-valve stem 31.

[0055] It should be noted that the valve stem 30 may also be an integrally formed structure.

[0056] In one embodiment, the circumferential surfaces of the first sub-valve stem 31 and the second sub-valve stem 32 are both provided with sealing grooves, and sealing members (not shown in the figure) are provided in the sealing grooves for forming a seal with the valve seat 10 .

[0057] In one embodiment, one end of the valve stem 30 away from the opening and closing member 20 is located outside the valve seat 10 to form a manual operation end.

[0058] For example, the end of the second sub-valve stem 32, away from the first sub-valve stem 31, is located outside the valve seat 10 to form a manual operating end. If the power supply 51 is inoperative, the first and second memory alloy members 40a, 40b are both in a relaxed state, and the manual operating end can be manually rotated to open and close the ball valve.

[0059] In one embodiment, at least one of the first memory alloy part 40a and the second memory alloy part 40b is a wound spring, the outer end of the wound spring is fixedly connected to the rack 62, and the inner end of the wound spring is fixedly connected to the valve seat 10 through a central fixed shaft (not shown in the figure).

[0060] Exemplarily, as shown in FIG5 , the first memory alloy member 40 a and the second memory alloy member 40 b are both wound springs.

[0061] The technical solution of this embodiment is described in detail below by taking the first memory alloy member 40a as a wound spring as an example.

[0062] The central fixed shaft is made of an insulating material and is fixedly mounted on the valve seat 10. The inner end of the coiled reed is fixedly connected to the central fixed shaft. When the coiled reed contracts due to heat, it can shrink with the central fixed shaft as a fixed point. During this contraction process, as shown in Figures 5 and 6, the outer end of the coiled reed drives the rack 62 to move in the direction of arrow M, thereby driving the gear 61 and the valve stem 30 to rotate in a first direction (indicated by arrow A). For example, the first direction is clockwise, and the second direction is counterclockwise.

[0063] 5 and 11 , the ball valve further includes a main circuit (not shown in the figures), which is enclosed in an insulating tube (not shown in the figures). The main circuit connects the positive electrode of the power supply device 51, the switch device 52, the first memory alloy member 40a or the second memory alloy member 40b, and the negative electrode. For example, one end of the main circuit is connected to the positive electrode of the power supply device 51, and then passes through the switch device 52 to the inner end of the wound reed. The end of the first memory alloy member 40a connected to the rack 62 is connected to the main circuit via a first wire 53, and the end of the second memory alloy member 40b connected to the rack 62 is connected to the main circuit via a second wire 54.

[0064] In other embodiments, at least one of the first memory alloy member 40a and the second memory alloy member 40b is a straight plate-shaped spring, one end of which is fixedly connected to the rack 62, and the other end of which is fixedly connected to the valve seat 10. The straight plate-shaped spring and the valve seat 10 are insulated.

[0065] For example, as shown in FIG. 7 , the first memory alloy member 40 a and the second memory alloy member 40 b are both straight plate-shaped springs.

[0066] The technical solution of this embodiment is described in detail below by taking the first memory alloy member 40 a as a straight plate-shaped spring as an example.

[0067] During the process of shrinking due to heat, the straight plate-shaped spring can drive the rack 62 to move along the arrow direction M, thereby driving the gear 61 to rotate along the arrow direction A.

[0068] It should be noted that the structures of the first memory alloy member 40a and the second memory alloy member 40b may also be different.

[0069] Exemplarily, the first memory alloy component 40a and the second memory alloy component 40b may both be made of nickel-titanium-based memory alloy.

[0070] It should be noted that the material of the first memory alloy member 40a and the second memory alloy member 40b may also be a copper-based memory alloy, an iron-based memory alloy, or the like.

[0071] By selecting the first memory alloy member 40 a and the second memory alloy member 40 b and using a spring with a fixed memory contraction ratio, the contraction ratio is kept fixed, thereby ensuring the rotation angle of the opening and closing member 20 .

[0072] It should be understood that in order to increase the response speed, a memory alloy with a lower phase transition temperature may be selected.

[0073] In one embodiment, as shown in FIG8 , the ball valve further includes a limiter 321 connected to the valve stem 30 ; the valve seat 10 is provided with a stopper 13 , and the limiter 321 can abut against the stopper 13 to limit the rotation angle of the valve stem 30 .

[0074] For example, as shown in Figures 3 and 6 , the valve seat 10 is further provided with a threaded interface 14, and a stopper 13 is provided on the end surface of the threaded interface 14. The stopper 321 abuts against the stopper 13 to limit the rotation angle of the valve stem 30, preventing the opening and closing member 20 from excessively rotating, thereby achieving the opening and closing of the ball valve.

[0075] In one embodiment, referring to Figure 6, the limit member 321 is a plate-shaped structure, and the limit member 321 is provided with a mounting hole (not shown in the figure), and the mounting hole cooperates with the valve stem 30 through a circumferential limiting structure to limit the rotation of the limit member 321 relative to the valve stem 30; the stop portion 13 has a first stop surface 131 and a second stop surface 132, and the limit member 321 has an arc-shaped protrusion 3211, and the arc-shaped protrusion 3211 has a first end 3211a and a second end 3211b, and the end surface of the first end 3211a is configured to be able to abut against the first stop surface 131 when the valve stem 30 rotates along the first direction; the end surface of the second end 3211b is configured to be able to abut against the second stop surface 132 when the valve stem 30 rotates along the second direction.

[0076] Exemplarily, a circumferential limiting structure is provided at one end of the second sub-valve stem 32 located outside the valve seat 10. For example, the circumferential limiting structure comprises two parallel, opposing limiting planes 320. The mounting hole has two parallel, opposing hole walls that mate with the limiting planes, allowing the limiting member 321 to rotate together with the valve stem 30.

[0077] Exemplarily, the stop portion 13 is a curved rod that is integrally formed with the valve seat 10. Of course, the curved rod can also be welded to the valve seat 10. Referring to FIG6 , when the valve stem 30 rotates in a first direction until the end surface of the first end 3211a abuts the first stop surface 131, the ball valve is in a fully open state. Referring to FIG10 , when the valve stem 30 rotates in a second direction until the end surface of the second end 3211b abuts the second stop surface 132, the ball valve is in a closed state.

[0078] It should be noted that if the ball valve is to be partially opened, the degree of contraction of the first memory alloy component 40 a and the second memory alloy component 40 b can be changed by controlling the temperature, thereby controlling the rotation angle of the opening and closing component 20 .

[0079] In one embodiment, as shown in FIG1 , the ball valve further includes a cover 70 connected to the valve seat 10. Exemplarily, the cover 70 and the valve seat 10 are fixedly connected by fastening bolts. A receiving space is provided on one side of the cover 70 near the valve seat 10. The first and second memory alloy components 40a, 40b are positioned within the receiving space. This protects the first and second memory alloy components 40a, 40b.

[0080] 1 , the switch device includes a first operating portion 521 and a second operating portion 522 . The first operating portion 521 and the second operating portion 522 are both located outside the cover 70 .

[0081] Illustratively, an opening is provided on the cover 70 to expose the first operating portion 521 and the second operating portion 522 of the switch device 52 for easy operation.

[0082] For example, the first operating portion 521 and the second operating portion 522 may be buttons. When the first operating portion 521 is pressed, the switch device is electrically connected to one end of the first memory alloy member 40a. Current flows from the positive electrode of the power supply device 51 through the first memory alloy member 40a and back to the negative electrode of the power supply device 51, forming a first circuit loop. The temperature of the first memory alloy member 40a rises. When the temperature sensor detects that the temperature reaches the phase transition temperature of the first memory alloy member 40a, it sends a signal to the controller, which controls the first operating portion 521 to pop up, at which point the first circuit loop is disconnected.

[0083] When the second operating portion 522 is pressed, the switch device is electrically connected to one end of the second memory alloy member 40b. Current flows from the positive electrode of the power supply device 51 through the second memory alloy member 40b and back to the negative electrode of the power supply device 51, forming a second circuit loop. The temperature of the second memory alloy member 40b rises. When the temperature sensor detects that the temperature reaches the phase transition temperature of the second memory alloy member 40b, it sends a signal to the controller, which controls the second operating portion 522 to pop up, disconnecting the second circuit loop.

[0084] In one embodiment, as shown in FIG. 1 , the ball valve further includes a protective cap 80 , which is threadedly connected to the valve seat 10 to cover the second sub-valve stem 32 inside the protective cap while being dustproof and waterproof.

[0085] When manual operation is required, the protective cap 80 can be removed first, and then the manual operation end can be rotated.

[0086] It should be understood that the present disclosure is not limited in its application to the detailed structure and arrangement of the components set forth in this specification. The present disclosure is capable of other embodiments and can be implemented and carried out in a variety of ways. The aforementioned variations and modifications fall within the scope of the present disclosure. It should be understood that the present disclosure disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All of these different combinations constitute multiple alternative aspects of the present disclosure. The embodiments described in this specification illustrate the best known ways to implement the present disclosure and will enable those skilled in the art to utilize the present disclosure.

Claims

1. A ball valve, characterized in that: The invention comprises a valve seat (10), an opening and closing member (20), a valve stem (30), a first memory alloy member (40a), a second memory alloy member (40b) and a power supply device (51); the valve seat (10) has a valve cavity and a first flow port (11) and a second flow port (12) communicated with the valve cavity; the opening and closing member (20) is installed in the valve cavity; one end of the valve stem (30) is connected to the opening and closing member (20); and the first memory alloy member (40a) and the second memory alloy member (40b) are both connected to the other end of the valve stem (30) via a transmission mechanism; The power supply device (51) is capable of forming a first circuit loop with the first memory alloy component (40a), so that the transmission mechanism drives the valve stem (30) to rotate along a first direction, and the connecting cavity (21) of the opening and closing component (20) is connected with the first flow port (11) and the second flow port (12); the power supply device (51) is also capable of forming a second circuit loop with the second memory alloy component (40b), so that the transmission mechanism drives the valve stem (30) to rotate along a second direction, and the connecting cavity (21) of the opening and closing component (20) is isolated from the first flow port (11) and the second flow port (12), wherein the second direction is opposite to the first direction.

2. The ball valve according to claim 1, characterized in that: The transmission mechanism comprises a gear (61) and a rack (62); the gear (61) is connected to the valve stem (30), the rack (62) is meshed with the gear (61), one end of the first memory alloy component (40a) is fixedly connected to one end of the rack (62), and the other end of the first memory alloy component (40a) is fixedly connected to the valve seat (10); one end of the second memory alloy component (40b) is fixedly connected to the other end of the rack (62), and the other end of the second memory alloy component (40b) is fixedly connected to the valve seat (10).

3. The ball valve according to claim 2, characterized in that: At least one of the first memory alloy component (40a) and the second memory alloy component (40b) is a wound reed sheet, one end of the wound reed sheet located outside is fixedly connected to the rack (62), and one end of the wound reed sheet located inside is fixedly connected to the valve seat (10) via a central fixed shaft.

4. The ball valve according to claim 2, characterized in that: At least one of the first memory alloy component (40a) and the second memory alloy component (40b) is a straight plate-shaped spring leaf, one end of which is fixedly connected to the rack (62), and the other end of which is fixedly connected to the valve seat (10).

5. The ball valve according to claim 2, characterized in that: The valve stem (30) includes a first sub-valve stem (31) (30) and a second sub-valve stem (32) (30) which are connected to each other, and one end of the first sub-valve stem (31) (30) away from the second sub-valve stem (32) (30) is connected to the opening and closing member (20), and the gear (61) is installed between the first sub-valve stem (31) (30) and the second sub-valve stem (32) (30).

6. The ball valve according to any one of claims 1 to 5, characterized in that: The valve seat (10) further comprises a limiter (321), wherein the limiter (321) is connected to the valve stem (30); the valve seat (10) is provided with a stopper (13), and the limiter (321) can abut against the stopper (13) to limit the rotation angle of the valve stem (30).

7. The ball valve according to claim 6, characterized in that: The limiting member (321) is a plate-shaped structure, and is provided with a mounting hole. The mounting hole cooperates with the valve stem (30) through a circumferential limiting structure to limit the circumferential rotation of the limiting member (321) relative to the valve stem (30); The stop portion (13) has a first stop surface (131) and a second stop surface (132), the limiting member (321) has an arc-shaped protrusion (3211), the arc-shaped protrusion (3211) has a first end (3211a) and a second end (3211b), the end surface of the first end (3211a) is configured to abut against the first stop surface (131) when the valve stem (30) rotates along the first direction; the end surface of the second end (3211b) is configured to abut against the second stop surface (132) when the valve stem (30) rotates along the second direction.

8. The ball valve according to any one of claims 1 to 5, characterized in that: It also includes a switch device (52), wherein the switch device (52) is used to enable the power supply device (51) and the first memory alloy member (40a) to form the first circuit loop, or to enable the power supply device (51) and the second memory alloy member (40b) to form the second circuit loop.

9. The ball valve according to claim 8, characterized in that: It also includes a cover (70), the cover (70) being connected to the valve seat (10), and a receiving space being provided on a side of the cover (70) close to the valve seat (10), and the first memory alloy component (40a) and the second memory alloy component (40b) being both located in the receiving space.

10. The ball valve according to claim 9, characterized in that: The switch device (52) comprises a first operating portion (521) and a second operating portion (522), wherein the first operating portion (521) and the second operating portion (522) are both located outside the cover (70); The first operating part (521) is electrically connected to one end of the first memory alloy member (40a) so that the power supply device (51) and the first memory alloy member (40a) form the first circuit loop; or the second operating part (522) is electrically connected to one end of the second memory alloy member (40b) so that the power supply device (51) and the second memory alloy member (40b) form the second circuit loop.

11. The ball valve according to any one of claims 1 to 5, characterized in that: One end of the valve stem (30) away from the opening and closing member (20) is located outside the valve seat (10) to form a manual operation end.

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