Check valves, check devices and electrical equipment

Abstract

The present application belongs to the technical field of electrical equipment, and specifically relates to a check valve, a check device and electrical equipment. The check valve includes a valve body and a valve core, the valve body is provided with a connecting port, and a limiting portion is provided in the valve body; the valve core is movably arranged in the valve body, and the valve core has a sealing head that can move back and forth to open and close the connecting port, and the valve core is provided with a locking portion. Under the condition that the sealing head of the valve core closes the connecting port, the locking portion of the valve core can be rotated to the bottom of the limiting portion to lock the position of the valve core. The check valve provided in the present application can keep the sealing head of the valve core in the connecting port of the valve body, so that the sealing head is pressed against the connecting port to improve the sealing reliability and sealing effect of the sealing head, and has good practicality.

Description

Technical Field

[0001] The present application belongs to the technical field of electrical equipment, and specifically relates to a check valve, a check device and electrical equipment. Background Art

[0002] Electrical appliances are currently widely used in daily life, especially in the kitchen and bathroom fields. Dishwashers, water purifiers, washing machines, water heaters, etc. are widely used. Basically, water flows through the above electrical appliances. Especially after the water is treated by the above electrical appliances and discharged outside the electrical appliances, a check valve needs to be set to prevent the discharged water from flowing back into the electrical appliances and affecting the operation of the electrical appliances.

[0003] In the related art, after long-term use, the check valve may have an unreliable sealing problem, which reduces the sealing performance of the check valve. Summary of the invention

[0004] The present application provides a check valve, a check device and an electrical device, which aim to at least to some extent solve the technical problem that the check valve may have unreliable sealing after long-term use, so as to improve the sealing performance of the check valve.

[0005] In a first aspect of the present application, a check valve is provided, comprising: a valve body, provided with a connecting port, a limiting portion being provided in the valve body; a valve core, movably provided in the valve body, the valve core having a sealing head that can move back and forth to open and close the connecting port, the valve core being provided with a locking portion, and under the condition that the sealing head of the valve core closes the connecting port, the locking portion of the valve core can be rotated to the bottom of the limiting portion to lock the position of the valve core.

[0006] The check valve provided in the present application has a connecting port on its valve body, a valve core is arranged in the valve body, and the valve core has a sealing head that can move back and forth to open and close the connecting port, so that the corresponding pipeline can be opened and closed to realize the check function; since a limiting portion is arranged in the valve body and a locking portion is arranged in the valve core, under the condition that the sealing head of the valve core closes the connecting port, the locking portion of the valve core can be rotated to the bottom of the limiting portion to lock the position of the valve core, so that the sealing head of the valve core can be maintained in the connecting port of the valve body, so that the sealing head can be pressed against the connecting port to improve the sealing reliability and sealing effect of the sealing head, and the check valve has good practicality.

[0007] In some embodiments, the check valve further includes: a movable part that can move back and forth in the valve body, the head of the movable part is provided with a driving part, and the driving part can abut against the locking part to drive the valve core to move into the valve body to close the connecting port.

[0008] In some embodiments, the check valve further comprises: a reset member disposed in the valve body to push the valve core to move in a direction away from the communication port. When the movable member drives the valve core to move into the valve body, the reset member is compressed, and when the movable member releases the drive of the valve core, the reset member restores the deformation, driving the sealing head of the valve core to separate from the communication port of the valve body, so as to open the communication port of the valve body.

[0009] In some embodiments, the head of the driving part is provided with a driving groove, the opening side of the driving groove faces the communication port, the driving groove has a first guiding slope inclined to the moving direction of the valve core, the locking part is movably provided in the driving groove, the locking part is provided with a second guiding slope matched with the first guiding slope, the second guiding slope of the locking part can move along the first guiding slope so that the locking part rotates to the bottom of the limiting part. Under the condition that the driving member drives the sealing head of the valve core to close the communication port of the valve body, the driving member is controlled to continue to move into the inside of the valve body, the second guiding slope of the locking part can move along the first guiding slope so that the locking part rotates to the bottom of the limiting part to lock the position of the sealing head of the valve core, so that the sealing head of the valve core is kept in the communication port of the valve body.

[0010] In some embodiments, the driving groove further has a limiting surface, and the limiting surface and at least a portion of the first guiding inclined surface are arranged opposite to each other, and the locking portion can be blocked by the limiting surface to limit the rotational position of the locking portion.

[0011] In some embodiments, a first guide portion is provided on the outer peripheral surface of the movable part, and a second guide portion is provided on the inner side wall of the valve body. The first guide portion and the second guide portion are slidably matched to provide guidance for the reciprocating movement of the movable part in the valve body.

[0012] In some embodiments, the first guide portion includes a guide protrusion disposed on the outer peripheral surface of the movable member, and the second guide portion includes a guide groove disposed on the inner side wall of the valve body.

[0013] In some embodiments, the inner side wall of the valve body is provided with two rows of limiting protrusions, the limiting protrusions are arranged along the moving direction of the movable part in the valve body, and the two rows of limiting protrusions and the inner side wall of the valve body constitute the guide groove.

[0014] In some embodiments, the bottom of the limiting protrusion is configured as the limiting portion.

[0015] In some embodiments, the guide protrusions and the guide grooves are provided in plurality, and the driving groove is provided at the bottom between adjacent guide protrusions.

[0016] In some embodiments, the locking portion has a locking part protruding from the outer circumference of the driving portion, and the locking part can be rotated to below the limiting portion.

[0017] In some embodiments, the limiting portion and the locking portion are provided in plurality.

[0018] In some embodiments, the valve core includes: a core body, which is arranged in the valve body, the sealing head is connected to the head of the core body, and at least a portion of the sealing head is elastic; a first guide sleeve, which is connected to the core body, and the locking portion is arranged on the outer peripheral surface of the first guide sleeve.

[0019] In some embodiments, the check valve further includes: a support gasket disposed in the valve body, the support gasket being disposed between the first guide sleeve and the sealing head, the support gasket being provided with a through hole for the core body to move through, and the reset member being disposed between the support gasket and the first guide sleeve.

[0020] In some embodiments, the movable part includes: a second guide sleeve, which is movably sleeved on the outer circumferential surface of the first guide sleeve, and the driving part is arranged at the bottom of the second guide sleeve; a guide rod, which is connected to the back of the second guide sleeve, and the guide rod movably passes through the valve body to be connected to a driving part that drives the movable part to move back and forth in the valve body.

[0021] In some embodiments, the check valve also includes: a support member, rotatably connected to the valve body and rotatably connected to the guide rod; a driving member, connected to the valve body, the driving member having a retractable telescopic end, the telescopic end of the driving member being connected to the support member to drive the support member to rotate on the valve body, thereby driving the movable member to reciprocate in the valve body.

[0022] In some embodiments, the middle portion of the support member is connected to the valve body, and both ends of the support member are respectively connected to the second guide sleeve and the telescopic end of the driving member.

[0023] In some embodiments, the check valve further comprises a detecting member and a triggering member cooperating with each other, wherein the triggering member is connected to the supporting member so as to rotate synchronously with the supporting member, and the triggering member and the detecting member are detachably contactable to confirm the position of the supporting member.

[0024] In some embodiments, the drive member includes a linear reciprocating mechanism.

[0025] In some embodiments, the driving member includes a solenoid valve and a transmission rod that cooperate with each other to control the transmission rod to extend and retract relative to the solenoid valve when the solenoid valve is energized, and the transmission rod is configured as the telescopic end of the driving member.

[0026] In the second aspect of the present application, the present application also provides a check device, which includes: a pipeline having a water inlet end and a water outlet end; the above-mentioned check valve is arranged on the pipeline, and the connecting port of the check valve can connect the water inlet end and the water outlet end.

[0027] The check device with the check valve can keep the sealing head of the valve core of the check valve in the connecting port of the valve body so that the sealing head is pressed against the connecting port to improve the sealing reliability and sealing effect of the sealing head, and has good practicality.

[0028] In a third aspect of the present application, the present application further provides an electrical device, wherein the electrical device comprises the aforementioned non-return device.

[0029] The electrical equipment with the above-mentioned check device can keep the sealing head of the valve core of the check valve in the connecting port of the valve body so that the sealing head is pressed against the connecting port to improve the sealing reliability and sealing effect of the sealing head, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 A schematic diagram showing a structure in which the communication port of the non-return device in one or more embodiments of the present application is in an open state;

[0032] Figure 2 Shows Figure 1 A schematic structural diagram of the connecting hole of the non-return device shown in FIG. 1 in a closed state;

[0033] Figure 3 Shows Figure 1 A partial schematic diagram of the pipeline in FIG.

[0034] Figure 4 Shows Figure 1 Schematic cross-sectional view of ;

[0035] Figure 5 Shows Figure 4 Schematic diagram of the assembly of the movable parts and the valve core;

[0036] Figure 6 Shows Figure 5 A schematic diagram of the structure of the moving parts in FIG.

[0037] Figure 7 Shows Figure 5 Partial schematic diagram of the valve core in FIG.

[0038] Figure 8 shows a schematic diagram of the interior of the valve body;

[0039] Fig. 9 It shows a schematic diagram of the structure of the valve core without the sealing head;

[0040] Fig.10 Shows Figure 1 A schematic diagram of the structure of the support member;

[0041] Fig.11 A schematic structural diagram of a driving member is shown.

[0042] Description of reference numerals:

[0043] Pipeline-a, water inlet-a1, water outlet-a2;

[0044] Check valve-b;

[0045] Valve body 1, communication port 11, second guide portion (guide groove) 12, limiting portion (limiting protrusion) 13, valve seat 14, valve cover 15, cantilever 16, bracket 17, limiting portion 18;

[0046] Valve core 2, sealing head 21, locking portion (locking protrusion) 22, second guide inclined surface 221, first side surface 222, second side surface 223, locking portion 224, rib 23, valve cap 24, reinforcement portion 25, first guide sleeve 26, core body 27;

[0047] Movable member 3, driving part 31, driving groove 32, first guide inclined surface 321, limiting surface 322, first guide part (guide protrusion) 33, second guide sleeve 34, guide rod 35;

[0048] Reset piece - 4;

[0049] Supporting pad-5, through hole-501;

[0050] Supporting member-6, connecting part-61, rotating part-62, supporting part-63, waist-shaped hole-631;

[0051] Driving member-7, solenoid valve-71, transmission member-72;

[0052] Test piece-8;

[0053] Trigger member-9, trigger protrusion-91. DETAILED DESCRIPTION

[0054] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0055] In the related art, the check device includes a pipe and a check valve. The pipe has a water inlet and a water outlet. The check valve is arranged on the pipe. The check valve is provided with a connecting port that can connect the water inlet and the water outlet. When the electrical equipment is draining water, the connecting port of the check valve is opened, and the water flows to the drain pipe through the check device. After the drainage is completed, the connecting port of the check valve is closed to prevent the residual water left in the drainage pipe from flowing back.

[0056] However, the valve core of the check valve is made of flexible rubber material, which will be deformed after long-term use, resulting in unreliable sealing and reduced sealing performance of the check valve.

[0057] Based on the above technical problems, the present application provides a check valve, a check device and an electrical device, aiming to at least to some extent solve the technical problem of unreliable sealing of the check valve after long-term use, so as to improve the sealing performance of the check valve.

[0058] Figure 1 A schematic diagram showing a structure in which the communication port of the non-return device in one or more embodiments of the present application is in an open state is shown. Figure 2 Shows Figure 1 The structural schematic diagram of the connecting hole of the non-return device shown in FIG. Figure 3 Shows Figure 1 A partial schematic diagram of the pipeline in . Figure 1-Figure 3 The check device provided in the present application also includes a pipe a and a check valve b. The pipe a has an inlet end a1 and an outlet end a2. The check valve b is arranged on the pipe a. The check valve b is provided with a connecting port 11, and the connecting port 11 can connect the inlet end a1 and the outlet end a2.

[0059] Figure 4 Shows Figure 1 Schematic diagram of the cross section. Figure 4The check valve b comprises a valve body 1 and a valve core 2. The valve body 1 is provided with a communication port 11. The inner side wall of the valve body 1 is provided with a limiting portion 18. The valve core 2 is movably arranged in the valve body 1. The valve core 2 has a sealing head 21 that can move back and forth to open and close the communication port 11 to connect or block the water inlet end a1 and the water outlet end a2. The valve core 2 is provided with a locking portion 22. Under the condition that the sealing head 21 of the valve core 2 closes the communication port 11, the locking portion 22 of the valve core 2 can be rotated to the bottom of the limiting portion 18 to lock the position of the valve core 2.

[0060] The check valve B provided in the present application has a valve body 1 provided with a connecting port 11, a valve core 2 arranged in the valve body 1, and a sealing head 21 which can move back and forth to open and close the connecting port 11, thereby opening and closing the corresponding pipeline a to realize the check valve function; since the inner side wall of the valve body 1 is provided with a limiting portion 18, the valve core 2 is provided with a locking portion 22, the locking portion 22 of the valve core 2 can be rotated to the bottom of the limiting portion 18 to lock the sealing head 21 of the valve core 2 to close the connecting port 11, thereby the sealing head 21 of the valve core 2 can be maintained in the connecting port 11 of the valve body 1, so that the sealing head 21 is pressed against the connecting port 11, so as to improve the sealing reliability and sealing effect of the sealing head 21, and the check valve B has good practicality.

[0061] Combination Figure 4 In some embodiments, the check valve b may further include a movable part 3 , and the movable part 3 may move back and forth in the valve body 1 . Figure 5 Shows Figure 4 The assembly diagram of the moving parts and the valve core. Figure 6 Shows Figure 5 The schematic diagram of the structure of the moving parts in Figure 7 Shows Figure 5 Partial schematic diagram of the valve core in FIG. Figure 5-Figure 7 The head of the movable part 3 is provided with a driving part 31, which can abut against the locking part 22 on the valve core 2 to drive the valve core 2 to move into the valve body 1, so that the sealing head 21 on the valve core 2 closes the connecting port 11 on the valve body 1 to cut off the pipeline a.

[0062] Combination Figure 4 In some embodiments, the check valve b may further include a reset member 4 , which is disposed in the valve body 1 to push the valve core 2 to move away from the communication port 11 to open the communication port 11 .

[0063] In some embodiments, when the driving portion 31 abuts against the locking portion 22 on the valve core 2 to drive the valve core 2 to move into the valve body 1, the sealing head 21 on the valve core 2 closes the connecting port 11 on the valve body 1. At the same time, the reset member 4 is compressed. When the connecting port 11 needs to be opened, the movable member 3 is released, and the reset member 4 restores its deformation to drive the valve core 2 to move away from the connecting port 11 to open the connecting port 11.

[0064] In other embodiments, under the condition that the driving portion 31 abuts against the locking portion 22 on the valve core 2 to drive the valve core 2 to move into the valve body 1, the sealing head 21 on the valve core 2 closes the connecting port 11 on the valve body 1, and at the same time, the reset member 4 is stretched, and when the connecting port 11 needs to be opened, the movable member 3 is released, and the reset member 4 restores its deformation to drive the valve core 2 to move away from the connecting port 11 to open the connecting port 11.

[0065] Combine 5- Figure 7 In some embodiments, a driving groove 32 may be provided at the head of the driving portion 31, the opening side of the driving groove 32 faces the connecting port 11, and the driving groove 32 has a first guide slope 321 inclined to the moving direction of the valve core 2. The locking portion 22 of the valve core 2 is movably arranged in the driving groove 32, and a second guide slope 221 matching the first guide slope 321 is provided on the locking portion 22. The second guide slope 221 of the locking portion 22 can move along the first guide slope 321 to rotate the locking portion 22 to the bottom of the limiting portion 18. Under the condition that the driving member 7 drives the sealing head 21 of the valve core 2 to close the connecting port 11 of the valve body 1, the driving member 7 is controlled to continue to move toward the inside of the valve body 1, the driving member 7 provides an axial downward force to the valve core 2, and the reset member 4 provides an axial upward force to the valve core 2. Since the second guide bevel 221 and the first guide bevel 321 on the locking portion 22 cooperate with each other, the second guide bevel 221 of the locking portion 22 can move along the first guide bevel 321, so that the locking portion 22 can be rotated to the bottom of the limiting portion 18 to lock the position of the sealing head 21 of the valve core 2, so that the sealing head 21 of the valve core 2 is maintained in the connecting port 11 of the valve body 1.

[0066] Combined with 5- Figure 7 In some embodiments, the driving groove 32 also has a limiting surface 322, and the limiting surface 322 and at least a portion of the first guide inclined surface 321 are arranged opposite to each other. The locking portion 22 can be blocked by the limiting surface 322 to limit the rotation position of the locking portion 22, so that the valve core 2 cannot continue to rotate and is maintained in a static posture to lock the position of the sealing head 21 of the valve core 2, so that the sealing head 21 of the valve core 2 is maintained in the connecting port 11 of the valve body 1.

[0067] In conjunction with 6, in some embodiments, the driving groove 32 may be V-shaped, that is, the driving groove 32 is sawtooth-shaped, one side wall of which is the first guiding inclined surface 321, and the other side wall is the limiting surface 322. The tops of the first guiding inclined surface 321 and the limiting surface 322 intersect, and the first guiding inclined surface 321 and the limiting surface 322 may be symmetrically arranged. In other embodiments, the driving groove 32 may also be U-shaped or other shapes. In addition to ensuring that the driving groove 32 has an inclined surface as the first guiding inclined surface 321, there is no restriction on the shape of the limiting surface 322. For example, the limiting surface 322 may be in the shape of an inclined surface, an arc surface, or a curved surface.

[0068] Combination Figure 7 In some embodiments, the locking portion 22 can be block-shaped, the first guide slope 321 can be set at the top of the locking portion 22, and the first side surface 222 and the second side surface 223 are respectively provided on both sides of the locking portion 22. The first side surface 222 is connected to the higher end of the first guide slope 321, and the second side surface 223 is connected to the lower end of the first guide slope 321. When the locking portion 22 is rotated to the bottom of the limiting portion 18, the first side surface 222 abuts against the limiting surface 322 to limit the rotation position of the locking portion 22.

[0069] Combination Figure 7 In some embodiments, the first side surface 222 and the second side surface 223 can be planes parallel to the axial direction of the valve core 2, or can be other shapes, such as an arc surface or a curved surface, etc., which is not limited here.

[0070] Figure 8 The internal schematic diagram of the valve body is shown. Figure 6 as well as Figure 8 In some embodiments, the outer peripheral surface of the movable part 3 may be provided with a first guide portion 33, and the inner side wall of the valve body 1 may be provided with a second guide portion 12. The first guide portion 33 and the second guide portion 12 are slidably matched to provide guidance for the reciprocating movement of the movable part 3 in the valve body 1.

[0071] Combination Figure 6 as well as Figure 8 In some embodiments, the first guide portion 33 may include a guide protrusion 33 provided on the outer peripheral surface of the movable member 3, and the second guide portion 12 may include a guide groove 12 provided on the inner side wall of the valve body 1. When the movable member 3 reciprocates in the valve body 1, the guide protrusion 33 slides in the guide groove 12 to provide guidance for the reciprocating movement of the movable member 3 in the valve body 1.

[0072] Combination Figure 8In some embodiments, the inner wall of the valve body 1 is provided with two rows of limiting protrusions 13, and the limiting protrusions 13 can be arranged along the moving direction of the movable part 3 in the valve body 1. The two rows of limiting protrusions 13 and the inner wall of the valve body 1 can be constructed into the above-mentioned guide groove 12.

[0073] Combination Figure 4 In some embodiments, the driving part 31 is disposed on the bottom of the guide protrusion 33, and the locking part 22 can also reciprocate in the guide groove 12. When the communication port 11 of the valve body 1 is in an open state, under the action of the elastic force of the reset member 4, the locking part 22 and the guide protrusion 33 on the driving member 7 move in the guide groove 12 in a direction away from the communication port 11 until they move to the highest position of the guide groove 12, so that the sealing head 21 on the valve core 2 is separated from the communication port 11, so that the pipe body is in a conducting state. When the connecting port 11 of the valve body 1 is switched to the closed state, the movable member 3 is controlled to move toward the connecting port 11 and overcome the elastic force of the reset member 4, so that the locking portion 22 and the guide protrusion 33 on the driving member 7 move in the guide groove 12 toward the connecting port 11 and are pushed out from the lowest position of the guide groove 12. When the locking portion 22 is pushed out from the lowest position of the guide groove 12, the second guide slope 221 of the locking portion 22 moves along the first guide slope 321 on the driving portion 31 of the movable member 3, so that the locking portion 22 rotates to the bottom of the limiting portion 18 to lock the position of the sealing head 21 of the valve core 2, so that the sealing head 21 of the valve core 2 is maintained in the connecting port 11 of the valve body 1. At this time, the movable member 3 can be released to keep the movable member 3 in a free state. When the connecting port 11 of the valve body 1 needs to be switched to the open state, the movable part 3 is controlled to move toward the connecting port 11 and overcome the elastic force of the reset member 4. The second guide slope 221 of the locking part 22 moves along the first guide slope 321 on the driving part 31 of the movable part 3, so that the locking part 22 rotates to below the guide protrusion 33 of the movable part 3. Then, the movable part 3 is released. Under the action of the elastic force of the reset member 4, the locking part 22 and the guide protrusion 33 on the driving member 7 are pushed into the guide groove 12 from the lowest position of the guide groove 12 and move in the direction away from the connecting port 11. When the locking part 22 and the guide protrusion 33 on the driving member 7 are in the guide groove driving groove 32 to the highest position of the guide groove 12, the sealing head 21 on the valve core 2 is separated from the connecting port 11, so that the tube body is in the conducting state.

[0074] Combination Figure 8 In some embodiments, the bottom of the limiting protrusion 13 can be configured as the above-mentioned limiting portion 18. In other embodiments, the limiting portion 18 can also be a protrusion disposed on the inner wall of the valve body 1 and protruding from the inner wall of the valve body 1, which is not limited here.

[0075] In some embodiments, multiple guide protrusions 33 and guide grooves 12 are correspondingly arranged. Multiple guide protrusions 33 can be arranged on the circumferential surface of the valve core 2 at circumferential intervals around the valve core 2, and multiple guide grooves 12 can be arranged on the inner wall of the valve body 1 at circumferential intervals around the valve body 1. By sliding multiple guide protrusions 33 in the corresponding guide grooves 12, the balance of force on the guide protrusions 33 can be improved.

[0076] In some embodiments, the driving grooves 32 may be disposed at the bottom between adjacent guide protrusions 33 and may be disposed continuously so that the bottom of the driving member 7 forms a sawtooth shape.

[0077] Combination Figure 5 In some embodiments, the locking portion 22 has a locking portion 224 protruding from the outer peripheral surface of the driving portion 31. When the second guide slope 221 of the locking portion 22 moves along the first guide slope 321 on the driving portion 31 of the movable member 3, the locking portion 224 of the locking portion 22 can be rotated to the bottom of the limiting portion 18 to lock the position of the sealing head 21 of the valve core 2, so that the sealing head 21 of the valve core 2 is maintained in the connecting port 11 of the valve body 1.

[0078] In some embodiments, multiple limiting portions 18 and locking portions 22 are correspondingly arranged. Multiple limiting portions 18 can be arranged on the inner wall of the valve body 1 around the circumference of the valve body 1, and multiple locking portions 22 can be arranged on the outer peripheral surface of the valve core 2 at intervals around the circumference of the valve core 2 to improve the reliability of the sealing head 21 when locking.

[0079] Combination Figure 4 In some embodiments, the valve body 1 may be provided with a valve seat 14 and a valve cover 15 , the communication port 11 is provided at one end of the valve seat 14 , and the valve cover 15 is provided at the other end of the valve seat 14 to seal the valve seat 14 .

[0080] In some embodiments, the valve core 2 is disposed in the valve seat 14 . Fig. 9 The schematic diagram of the valve core without the sealing head is shown. Fig. 9 The valve core 2 includes a core body 27 and the above-mentioned sealing head 21. The core body 27 is arranged in the valve seat 14. The sealing head 21 is connected to the head of the core body 27. At least part of the sealing head 21 is elastic, so that when the sealing head 21 closes the connecting port 11, it presses against the connecting hole 51 so as to be squeezed by the side wall of the connecting port 11, so as to improve the sealing effect of the connecting port 11 and improve the sealing performance of the check valve b.

[0081] In some embodiments, the sealing head 21 can be inserted into the head of the core body 27; or, the sealing head 21 can also be bonded to the head of the core body 27; or, the sealing head 21 is inserted into the head of the core body 27, and the reliability of the connection and assembly of the sealing head 21 on the core body 27 is improved by bonding, without any limitation.

[0082] Combination Fig. 9 In some embodiments, a plurality of ribs 23 may be provided on the periphery of the valve core 2 , and the plurality of ribs 23 may be arranged along the axial direction of the valve core 2 to improve the strength of the valve core 2 .

[0083] Combination Fig. 9 In some embodiments, the valve core 2 also includes a valve bonnet 24 and a reinforcement portion 25, wherein the valve bonnet 24 is connected to the tail of the valve body 1, and the reinforcement portion 25 is connected to the middle part of the circumference of the valve core 2. The reinforcement portion 25 can be an annular protrusion arranged on the circumference of the valve core 2, and a plurality of ribs 23 are connected between the valve bonnet 24 and the reinforcement portion 25.

[0084] Combination Fig. 9 In some embodiments, the valve core 2 further includes a first guide sleeve 26 connected to the core body 27 , and the locking portion 22 is disposed on the outer circumferential surface of the first guide sleeve 26 .

[0085] Combination Fig. 9 In some embodiments, the first guide sleeve may be connected to the circumferential surface of the plurality of ribs 23 , and its radius may be slightly smaller than the radius of the valve seat 14 , so that the first guide sleeve may move and / or rotate within the valve seat 14 .

[0086] Combination Fig. 9 In some embodiments, the locking portion 22 may be a locking protrusion arranged on the outer circumferential surface of the first guide sleeve 26, which may be integrally formed on the outer circumferential surface of the first guide sleeve 26, and the top of the locking protrusion is provided with the second guide slope 221, and the bottom of the locking protrusion may be a plane perpendicular to the circumference of the valve core 2, and the two sides of the circumference of the locking portion 22 around the first guide sleeve (i.e., the first side portion and the second side portion) may be planes parallel to the axis of the valve core 2, wherein the first side portion of the locking portion 22 with a longer length may be blocked by the limiting surface 322 of the driving groove 32.

[0087] Combination Figure 4In some embodiments, the check valve b may further include a support gasket 5, which is arranged in the valve body 1, the support gasket 5 is arranged between the first guide sleeve and the sealing head 21, the support gasket 5 is provided with a through hole 51 for the core body 27 to move through, the above-mentioned reset member 4 is arranged between the support gasket 5 and the first guide sleeve, the top end of the reset member 4 can be connected to the first guide sleeve, the bottom end of the reset member 4 can be connected to the support gasket 5, and the reset member 4 can be sleeved on the core body 27, so that the compression deformation of the reset member 4 can be guided.

[0088] Combination Figure 6 In some embodiments, the movable member 3 may include a second guide sleeve 34 and a guide rod 35. The second guide sleeve 34 is sleeved on the outer circumferential surface of the first guide sleeve 26. The above-mentioned driving part 31 is arranged at the bottom of the second guide sleeve 34. The guide rod 35 is connected to the back of the second guide sleeve 34. The guide rod 35 moves through the valve cover 15 of the valve body 1 to be connected with the driving member 7 that drives the movable member 3 to move back and forth in the valve body 1.

[0089] In some embodiments, the radius of the second guide sleeve 34 can be slightly larger than the radius of the first guide sleeve 26 so that the second guide sleeve 34 can be loosely mounted on the first guide sleeve 26, and the radius of the second guide sleeve 34 can be smaller than the radius of the valve seat 14 so that the second sleeve can move back and forth in the valve seat 14.

[0090] Combination Figure 6 In some embodiments, the outer circumferential surface of the second guide sleeve 34 may be provided with the above-mentioned guide protrusions 33 , and a plurality of guide protrusions 33 may be integrally formed on the outer circumferential surface of the second guide sleeve 34 .

[0091] Combination Figure 1 as well as Figure 2In some embodiments, the check valve b may further include a support member 6 and a driving member 7, wherein the support member 6 is rotatably connected to the valve body 1 and is rotatably connected to the guide rod 35, the driving member 7 is connected to the valve body 1, and the driving member 7 has a retractable telescopic end, and the retractable end of the driving member 7 is connected to the support member 6 to drive the support member 6 to rotate on the valve body 1, so as to drive the movable member 3 to reciprocate in the valve body 1. When the connecting port 11 of the valve body 1 needs to be closed, the telescopic end of the driving member 7 is controlled to extend to drive the supporting member 6 to rotate on the valve body 1. The rotating supporting member 6 drives the movable member 3 to move in the direction of the connecting port 11 through the guide rod 35, and overcomes the elastic force of the reset member 4, so that the locking portion 22 and the guide protrusion 33 on the driving member 7 move in the guide groove 12 toward the connecting port 11 and are pushed out from the lowest position of the guide groove 12. When the locking portion 22 is pushed out from the lowest position of the guide groove 12, the second guiding inclined surface 221 of the locking portion 22 moves along the first guiding inclined surface 321 on the driving portion 31 of the movable member 3, so that the locking portion 22 rotates to the bottom of the limiting portion 18 to lock the position of the sealing head 21 of the valve core 2, so that the sealing head 21 of the valve core 2 is maintained in the connecting port 11 of the valve body 1. At this time, the telescopic end of the driving member 7 can be controlled to stop extending to release the movable member 3 so that the movable member 3 remains in a free state. When the communication port 11 of the valve body 1 needs to be switched to the open state, the telescopic end of the driving member 7 is controlled to extend again to drive the support member 6 to rotate on the valve body 1. The rotating support member 6 drives the movable member 3 to move toward the communication port 11 through the guide rod 35 and overcomes the elastic force of the reset member 4. The second guide slope 221 of the locking portion 22 moves along the first guide slope 321 on the driving portion 31 of the movable member 3, so that the locking portion 22 rotates to the lower side of the guide protrusion 33 of the movable member 3. Then, the locking portion 22 can be opened. The telescopic end of the control driving member 7 stops extending to release the movable member 3. Under the action of the elastic force of the reset member 4, the locking portion 22 and the guide protrusion 33 on the driving member 7 are pushed into the guide groove 12 from the lowest position of the guide groove 12 and move in the direction away from the connecting port 11. When the locking portion 22 and the guide protrusion 33 on the driving member 7 are in the guide groove driving groove 32 to the highest position of the guide groove 12, the sealing head 21 on the valve core 2 is separated from the connecting port 11, so that the tube body is in a conducting state.

[0092] The check valve b provided in the present application only needs to control the driving member 7 to perform two triggering actions to realize the opening and closing of the connecting port 11 on the control valve body 1, and the connecting port 11 of the valve body 1 is in a closed state. In addition, the driving member 7 can be in a stopped state when the connecting port 11 on the valve body 1 is kept in a closed state or an open state, which can save energy consumption and correspondingly improve the service life of the equipment, and has good practicality.

[0093] In some embodiments, the middle part of the support member 6 is connected to the valve body 1, and the two ends of the support member 6 are respectively connected to the second guide sleeve 34 and the telescopic end of the driving member 7, so that the driving member 7, the support member 6 and the guide rod 35 form a lever structure that rotates around the middle part of the support member 6, and can reduce the space occupied by the check valve b.

[0094] Fig.10 Shows Figure 1 Schematic diagram of the structure of the support member. Fig.10 In a specific implementation, the support member 6 can be a block structure, which has a connecting portion 61, a rotating portion 62 and a supporting portion 63. The supporting portion 63 and the connecting portion 61 of the support member 6 are respectively arranged at the two ends of the support member 6, and the rotating portion 62 of the support member 6 is arranged in the middle of the support member 6. The supporting portion 63 of the support member 6 is connected to the guide rod 35, and the connecting portion 61 of the support member 6 is connected to the telescopic end of the driving member 7, so that the support member 6 rotates around its rotating portion 62 under the drive of the telescopic end of the support member 6, so that the supporting portion 63 of the driving member 7 drives the movable member 3 with a rod body to move in the valve body 1.

[0095] Combination Fig.10 In some embodiments, the support member 6 may be a block-shaped structure, and the support portion 63 of the support member 6 may be provided with a waist-shaped hole 631, and the rod body passes through the waist-shaped hole 631 of the support portion 63 of the support member 6 to achieve the connection between the rod body and the support portion 63 of the support member 6. Figure 1 , Figure 2 as well as Fig.10 A cantilever 16 may be provided on the valve body 1, and the cantilever 16 movably passes through the rotating portion 62 of the support member 6 and is connected by a connecting member such as a pin to realize a rotatable connection between the support member 6 and the valve body 1; the driving member 7 may be connected to the outer side of the valve body 1 through a bracket 17, and the telescopic end of the driving member 7 passes through the connecting portion 61 of the support member 6 and is connected by a connecting member such as a pin to realize the connection between the support member 6 and the telescopic end of the driving member 7.

[0096] It should be noted that, in other embodiments, the connecting portion 61 of the driving member 7 may also be disposed between the supporting portion 63 and the rotating portion 62 thereof, and the purpose of driving the movable member 3 having a rod body to move in the valve body 1 can also be achieved.

[0097] Combination Figure 1 , Figure 2 as well as Fig.10 In some embodiments, the check valve b may also include a detecting member 8 and a triggering member 9 that cooperate with each other. The triggering member 9 is connected to the support member 6 to rotate synchronously with the support member 6. The triggering member 9 and the detecting member 8 can be detachably contacted to confirm the position of the support member 6.

[0098] In a specific implementation, a trigger protrusion 91 can be provided on the side of the support member 6 facing the valve body 1. The trigger protrusion 91 can be configured as a trigger member 9. The trigger protrusion 91 rotates synchronously with the support member 6. The detection member 8 can be a micro switch or a position sensor or other components, that is, it can be connected to the valve body 1. During the rotation of the trigger protrusion 91 with the valve body 1, the trigger protrusion 91 can contact the detection part of the detection member 8 to confirm the position of the support member 6, and then confirm the opening and closing state of the check valve b.

[0099] Fig.11 The schematic diagram of the structure of the driving member is shown. Fig.11 In some embodiments, the driving member 7 may include a solenoid valve 71 and a transmission member 72 that cooperate with each other. When the solenoid valve 71 is energized, the transmission rod is controlled to be extended relative to the solenoid valve 71, and the transmission rod is configured as the telescopic end of the driving member 7. The solenoid valve 71 is used as the setting scheme of the driving member 7. The telescopic switching of the telescopic end of the driving member 7 can be realized by controlling the solenoid valve 71 to be energized, which is simple and practical, and can save energy.

[0100] In other embodiments, the driving member 7 may also be a linear reciprocating motion mechanism such as a wax motor, a linear motor, etc., which is not limited here.

[0101] In the second aspect of the present application, the present application also provides a check device, which includes a pipeline a and the above-mentioned check valve b, the pipeline a has an inlet end a1 and a water outlet end a2, the above-mentioned check valve b is arranged on the pipeline a, and the connecting port 11 of the above-mentioned check valve b can connect the water inlet end a1 and the water outlet end a2.

[0102] The check device with the above-mentioned check valve b can keep the sealing head 21 of the valve core 2 of the check valve b in the connecting port 11 of the valve body 1 so that the sealing head 21 is pressed against the connecting port 11 to improve the sealing reliability and sealing effect of the sealing head 21, and has good practicality.

[0103] In a third aspect of the present application, the present application further provides an electrical device, which includes the above-mentioned non-return device.

[0104] The electrical equipment with the above-mentioned check device can keep the sealing head 21 of the valve core 2 of the check valve b in the connecting port 11 of the valve body 1, so that the sealing head 21 is pressed against the connecting port 11, thereby improving the sealing reliability and sealing effect of the sealing head 21, and has good practicality.

[0105] In some embodiments, the electrical device may be a dishwasher, or a water purifier, a washing machine, a water heater, etc., which are not limited here. Now, taking a dishwasher as an example, the electrical device equipped with the above-mentioned non-return device is further described.

[0106] In some embodiments, the check device can be installed at the drain outlet of the dishwasher. When the dishwasher is draining, the drain pump pumps the water in the dishwasher into the pipe a of the check device and controls the connecting port 11 to be opened. The water flows to the drain pipe a through the check device. After the drainage is completed, the connecting port 11 of the check device is controlled to be closed to prevent the residual water remaining in the drain pipe a from flowing back into the container. This has good practicality.

[0107] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0108] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0109] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0110] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0111] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A check valve, characterized in that: The check valve comprises: A valve body is provided with a communication port, and a limit position portion is provided in the valve body; A valve core is movably arranged in the valve body, and the valve core has a sealing head that can move back and forth to open and close the connecting port. The valve core is provided with a locking portion. When the sealing head of the valve core seals the connecting port, the locking portion of the valve core can be rotated to the bottom of the limiting portion to lock the position of the valve core.

2. The check valve according to claim 1, characterized in that: The check valve further comprises: The movable part can move back and forth in the valve body. The head of the movable part is provided with a driving part. The driving part can abut against the locking part to drive the valve core to move into the valve body to close the communication port.

3. The check valve according to claim 2, characterized in that: The check valve further comprises: A reset member is arranged in the valve body to push the valve core to move in a direction away from the communication port.

4. The check valve according to claim 3, characterized in that: The head of the driving part is provided with a driving groove, the opening side of the driving groove faces the connecting port, the driving groove has a first guiding slope inclined to the moving direction of the valve core, the locking part is movably arranged in the driving groove, and the locking part is provided with a second guiding slope matched with the first guiding slope, and the second guiding slope of the locking part can move along the first guiding slope to make the locking part rotate to the bottom of the limiting part.

5. The check valve according to claim 4, characterized in that: The driving groove further has a limiting surface, and the limiting surface and at least a portion of the first guiding inclined surface are arranged opposite to each other, and the locking portion can be blocked by the limiting surface.

6. The check valve according to claim 4, characterized in that: The outer peripheral surface of the movable part is provided with a first guide part, and the inner side wall of the valve body is provided with a second guide part. The first guide part and the second guide part are slidably matched to provide guidance for the reciprocating movement of the movable part in the valve body.

7. The check valve according to claim 6, characterized in that: The first guide portion includes a guide protrusion disposed on the outer peripheral surface of the movable member, and the second guide portion includes a guide groove disposed on the inner side wall of the valve body.

8. The check valve according to claim 7, characterized in that: The inner side wall of the valve body is provided with two rows of limiting protrusions, and the limiting protrusions are arranged along the moving direction of the movable member in the valve body. The two rows of limiting protrusions and the inner side wall of the valve body form the guide groove.

9. The check valve according to claim 8, characterized in that: The bottom of the limiting protrusion is configured as the limiting portion.

10. The check valve according to any one of claims 7 to 9, characterized in that: The guide protrusions and the guide grooves are correspondingly arranged in plurality, and the driving groove is arranged at the bottom between adjacent guide protrusions.

11. The check valve according to any one of claims 2 to 9, characterized in that: The locking portion has a locking part protruding from the outer peripheral surface of the driving portion, and the locking part can be rotated to the lower side of the limiting portion.

12. The check valve according to any one of claims 1 to 9, characterized in that: The limiting parts and the locking parts are provided in plurality accordingly.

13. The check valve according to any one of claims 3 to 9, characterized in that: The valve core comprises: A core body is arranged in the valve body, the sealing head is connected to the head of the core body, and at least a part of the sealing head is elastic; The first guide sleeve is connected to the core body, and the locking portion is arranged on the outer peripheral surface of the first guide sleeve.

14. The check valve according to claim 13, characterized in that The check valve further comprises: A support gasket is arranged in the valve body, the support gasket is arranged between the first guide sleeve and the sealing head, the support gasket is provided with a through hole for the core body to move through, and the reset member is arranged between the support gasket and the first guide sleeve.

15. The check valve according to claim 13, characterized in that The movable parts include: A second guide sleeve, movably sleeved on the outer circumference of the first guide sleeve, wherein the driving part is arranged at the bottom of the second guide sleeve; The guide rod is connected to the back of the second guide sleeve and movably passes through the valve body so as to be connected with a driving member that drives the movable member to move back and forth in the valve body.

16. The check valve according to claim 15, characterized in that The check valve further comprises: A support member rotatably connected to the valve body and rotatably connected to the guide rod; A driving member is connected to the valve body, and the driving member has a retractable telescopic end. The telescopic end of the driving member is connected to the supporting member to drive the supporting member to rotate on the valve body, so as to drive the movable member to reciprocate in the valve body.

17. The check valve according to claim 16, characterized in that The middle part of the support member is connected to the valve body, and the two ends of the support member are respectively connected to the second guide sleeve and the telescopic end of the driving member.

18. The check valve according to claim 16 or 17, characterized in that: The check valve also includes a detection member and a trigger member that cooperate with each other. The trigger member is connected to the support member to rotate synchronously with the support member. The trigger member and the detection member can be detachably contacted to confirm the position of the support member.

19. The check valve according to claim 16 or 17, characterized in that: The driving member includes a linear reciprocating motion mechanism.

20. The check valve according to claim 19, characterized in that The driving member includes a solenoid valve and a transmission rod that cooperate with each other, so that when the solenoid valve is energized, the transmission rod is controlled to be telescopic relative to the solenoid valve, and the transmission rod is configured as the telescopic end of the driving member.

21. A non-return device, characterized in that: The non-return device comprises: A pipe having a water inlet end and a water outlet end; The check valve according to any one of claims 1 to 20 is arranged on the pipeline, and the connecting port of the check valve can connect the water inlet end and the water outlet end.

22. An electrical device, characterized in that: The electrical equipment includes the non-return device according to claim 21.

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