Sealing structure, three-way valve element and three-way switching valve

Abstract

The utility model discloses a sealing structure, a three-way valve element and a three-way switching valve, and belongs to the technical field of valves. The sealing structure is used in the three-way valve element, the three-way valve element comprises the sealing structure and a supporting frame, the sealing structure is connected with the supporting frame through a contact pin, so that a sealing partition is formed between an upper space and a lower space of the sealing structure, the sealing structure comprises an annular outer base and an inner base arranged in the annular outer base, and a mounting space is formed between the annular outer base and the inner base. The annular outer seat is provided with a first plugging groove used for plugging the contact pin, the plugging path of the contact pin in the first plugging groove passes through the installation space, and the annular outer seat and the inner seat are integrally formed. According to the sealing structure, the annular outer seat and the inner seat are integrally formed, so that the overall structural strength can be improved, the insertion pins can be inserted into the annular outer seat, the problem that the first insertion grooves are broken or notches when the insertion pins are inserted into the annular outer seat is solved, and the connection smoothness between the sealing structure and the supporting frame can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a sealing structure, a three-way valve core and a three-way switching valve. Background Art

[0002] In a three-way valve core, the sealing structure (valve cover) of the three-way valve body is usually hermetically connected to the support frame so that the sealing structure can seal the support frame. However, since the connection between the sealing structure and the support frame usually adopts a split structure at present, the processing of the sealing structure is complicated and cumbersome, the cost is high, and the overall structural strength of the sealing structure is low, resulting in the problem that the sealing structure is easily damaged during connection.

[0003] In view of the above problems, there is an urgent need for a sealing structure, a three-way valve core and a three-way switching valve to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a sealing structure, a three-way valve core and a three-way switching valve, which are simple and convenient to process, have a low cost, can increase the overall structural strength of the sealing structure, and can ensure the smooth connection between the sealing structure and the support frame.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A sealing structure for a three-way valve core, the three-way valve core comprising a sealing structure and a support frame, the sealing structure being connected to the support frame by a pin so that a sealing partition is formed between the upper and lower spaces of the sealing structure, the sealing structure comprising:

[0007] An annular outer seat and an inner seat disposed within the annular outer seat, an installation space being formed between the annular outer seat and the inner seat, the annular outer seat being provided with a first insertion slot for inserting the pin, the insertion path of the pin in the first insertion slot passing through the installation space, and the annular outer seat and the inner seat being integrally formed.

[0008] As an alternative, the annular outer seat is provided with a processing slot communicating with the installation space.

[0009] A three-way valve core, comprising:

[0010] A three-way valve body, the three-way valve body comprising a support frame and the sealing structure as described above, the sealing structure further comprising a pin, the support frame being provided with a second insertion slot, and the pin being inserted into the second insertion slot and the first insertion slot on the annular outer seat;

[0011] A valve core assembly, slidably disposed within the three-way valve body.

[0012] As an alternative, a first seal is connected between the annular outer seat and the support frame, and the first insertion slot is located below the first seal.

[0013] As an alternative, the sealing structure further includes a sealing sleeve, the inner seat is used for sleeving and installing the sealing sleeve, a first stop is provided on one of the inner seat and the sealing sleeve, and a second stop is provided on the other, and the first stop can abut against the second stop.

[0014] As an alternative, the support frame includes an upper base, a middle base, a lower base and a connecting plate. The upper base and the middle base, and the middle base and the lower base are respectively connected by the connecting plate. A first through port is formed between the upper base and the middle base, and a second through port is formed between the middle base and the lower base. A third through port is provided at the bottom end of the lower base. A first connection port capable of communicating or separating the first through port and the second through port is provided in the middle base, and a second connection port capable of communicating or separating the second through port and the third through port is provided in the lower base. And the second insertion slot is provided on the upper base, and the annular outer seat is hermetically connected in the upper base.

[0015] As an alternative, the spool assembly includes:

[0016] A valve stem, slidably inserted into the inner seat;

[0017] A first seal seat, located below the inner seat and connected to the valve stem. The valve stem can drive the first seal seat to move along the Z-axis so that the first seal seat blocks or opens the first connection port.

[0018] As an alternative, the spool assembly further includes:

[0019] A second seal seat, located below the first seal seat and connected to the valve stem. The valve stem can synchronously drive the second seal seat to move along the Z-axis when driving the first seal seat so that the second seal seat blocks or opens the second connection port.

[0020] As an alternative, the spool assembly further includes a buffer module, and the buffer module includes:

[0021] A pressing plate, fixedly sleeved on the valve stem;

[0022] A mounting seat, partially connected to the inside of the first seal seat;

[0023] A first elastic member, one end of which is connected to the pressing plate, and the other end of the first elastic member is connected to the mounting seat. The first elastic member is accommodated in the first seal seat;

[0024] A second elastic member is sleeved on the valve stem, and one end thereof is connected to the first sealing seat. The other end of the second elastic member is connected to the support frame. The second elastic member can drive the valve stem to reset upward along the Z axis, so that the first sealing seat opens the first connection port.

[0025] A three-way switching valve includes the three-way valve core as described above.

[0026] The beneficial effects of the present utility model are as follows:

[0027] By integrally forming the annular outer seat and the inner seat; on the one hand, the processing of the sealing structure can be made relatively simple and convenient, and the cost is low; on the other hand, the overall structural strength of the sealing structure can be increased through the integrally formed structure, so that it is beneficial for the pin to be inserted into the first insertion groove on the annular outer seat, and to avoid the problem of fracture or notch of the first insertion groove when the pin is inserted; and, by forming an installation space between the annular outer seat and the inner seat, the insertion path of the pin in the first insertion groove passes through the installation space, so that part of the structure of the pin can be accommodated in the installation space, and the inner seat will not interfere with the pin, ensuring the smoothness of the connection between the sealing structure and the support frame. Description of the Drawings

[0028] Figure 1 is a schematic structural diagram of the three-way valve core (excluding the second elastic member, the first sealing seat seals the first connection port, and the second sealing seat is separated from the second connection port) provided by the present utility model;

[0029] Figure 2 is a schematic structural diagram of the valve core assembly (connected with the sealing structure) provided by the present utility model;

[0030] Figure 3 is a schematic structural diagram of the sealing structure (without the sealing sleeve installed) provided by the present utility model Figure 1 ;

[0031] Figure 4 is a schematic structural diagram of the sealing structure (without the sealing sleeve installed) provided by the present utility model Figure 2 ;

[0032] Figure 5 is a schematic structural diagram of the sealing sleeve not installed on the inner seat provided by the present utility model;

[0033] Figure 6 is a schematic structural diagram of the support frame provided by the present utility model.

[0034] Description of the Reference Numerals:

[0035] 1 - Support frame; 11 - Upper base; 1111 - Second through hole; 1112 - Arc-shaped groove; 12 - Middle base; 13 - Lower base; 14 - Second seal; 15 - Connection plate; 16 - First through port; 17 - Second through port; 18 - First connection port; 19 - Second connection port; 10 - Third through port;

[0036] 21 - Sealing structure; 211 - Ring-shaped outer seat; 212 - Inner seat; 2121 - Ring-shaped clamping groove; 2122 - First retaining platform; 2131 - First through hole; 2132 - Installation space; 214 - Machining groove; 22 - Sealing sleeve; 221 - Second retaining platform; 3 - Insertion pin; 31 - Minute hand; 32 - Connection pin;

[0037] 2 - Spool assembly; 23 - Valve stem; 24 - First seal seat; 25 - Pressure plate; 26 - First elastic member; 27 - Mounting seat; 28 - Second seal seat; 20 - First seal. Detailed implementation

[0038] All features disclosed in this specification, or all steps in the disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined in any way.

[0039] Any feature disclosed in this specification, unless specifically described, can be replaced by other equivalent or similar-purpose alternative features. That is, unless specifically described, each feature is only an example of a series of equivalent or similar features. Throughout the specification, the same reference numerals indicate the same elements.

[0040] To make the technical problems solved by the present utility model, the technical solutions adopted, and the achieved technical effects clearer, the technical solutions of the present utility model will be further described below with reference to the accompanying drawings and through specific implementation manners.

[0041] In this embodiment, a sealing structure, a three-way spool including the sealing structure, and a three-way switching valve including the three-way spool are proposed. The three-way switching valve further includes an outer valve body and an actuator, the actuator is connected to the three-way spool, and the outer valve body is fixedly connected outside the three-way spool. Among them, the specific working principle of the three-way switching valve can refer to the working principle of common three-way switching valves in the prior art.

[0042] Specifically, as Figures 1 to 6As shown, the sealing structure 21 is used in a three-way valve core. The three-way valve core includes the sealing structure 21 and the support frame 1. The sealing structure 21 is connected to the support frame 1 through the pin 3, so as to form a sealed partition between the upper and lower spaces of the sealing structure 21. The sealing structure 21 includes an annular outer seat 211 and an inner seat 212 provided inside the annular outer seat 211. An installation space 2132 is formed between the annular outer seat 211 and the inner seat 212. A first insertion slot for inserting the pin 3 is provided on the annular outer seat 211. The insertion path of the pin 3 in the first insertion slot passes through the installation space 2132. The annular outer seat 211 and the inner seat 212 are integrally formed.

[0043] In this embodiment, compared with the prior art, the specific structural settings of the sealing structure 21 are changed. By integrally forming the annular outer seat 211 and the inner seat 212, on the one hand, the processing of the sealing structure 21 can be relatively simple and convenient, and the cost is relatively low. On the other hand, the structural strength of the sealing structure 21 can be increased through the integrally formed structure, so as to facilitate the insertion of the pin 3 into the first insertion slot on the annular outer seat 211, and avoid the problems of fracture or notch of the first insertion slot when the pin 3 is inserted into the annular outer seat 211.

[0044] And, as Figure 3 and Figure 4 shown, by forming an installation space 2132 between the annular outer seat 211 and the inner seat 212, the insertion path of the pin 3 in the first insertion slot passes through the installation space 2132, so as to be able to accommodate part of the structure of the pin 3 into the installation space 2132, so that the inner seat 212 will not interfere with the insertion operation of the pin 3, and ensure the smooth connection between the sealing structure 21 and the support frame 1.

[0045] Specifically, as Figure 5 shown, a processing groove 214 communicating with the installation space 2132 is provided on the annular outer seat 211, so as to facilitate the processing and forming of the inner seat 212 through the processing groove 214 during the injection molding process.

[0046] Specifically, as Figures 2 to 4 shown, two first through holes 2131 located on the same side are provided on the annular outer seat 211, and the two first through holes 2131 communicate with the installation space 2132 respectively, so as to be able to form a first insertion sub-slot among the installation space 2132 and the two first through holes 2131. And, two opposite first insertion sub-slots are provided on the annular outer seat 211. That is, the two opposite first insertion sub-slots form the above-mentioned first insertion slot.

[0047] The three-way valve spool proposed in this embodiment includes a three-way valve body and a valve spool assembly 2; among them, the three-way valve body includes a support frame 1 and the above-mentioned sealing structure 21, the sealing structure 21 further includes a pin 3, and the outer valve body is fixedly connected to the outside of the support frame 1, and the support frame 1 and the outer valve body are hermetically connected, and a second insertion slot is provided on the support frame 1; the pin 3 is inserted into the second insertion slot and the first insertion slot on the annular outer seat 211; the valve spool assembly 2 is slidably arranged inside the three-way valve body.

[0048] The connection method between the support frame 1 and the sealing structure 21 is changed in the three-way valve spool of this embodiment; by inserting the pin 3 into the first insertion slot and the second insertion slot, the connection between the sealing structure 21 and the support frame 1 is realized, so that the support frame 1 and the sealing structure 21 are connected into an integral structure; on the one hand, the connection method between the two is relatively simple and convenient, and the disassembly is easy; on the other hand, since the connection method of inserting the pin 3 does not require a large connection space, the structure between the sealing structure 21 and the support frame 1 is relatively compact, so that the space required for installation can be saved, and the overall height of the three-way valve spool can be reduced.

[0049] It is worth noting that three annular grooves are arranged at intervals on the support frame 1, and each annular groove is used for sleeving and installing a second sealing member 14, so as to realize the sealing connection between the support frame 1 and the outer valve body through the three second sealing members 14. Among them, the second sealing member 14 can specifically be an O-ring.

[0050] Specifically, as Figure 2 shown, a first sealing member 20 is connected between the annular outer seat 211 and the support frame 1, that is, the first sealing member 20 is sleeved and installed on the annular outer seat 211 to realize the sealing connection between the support frame 1 and the annular outer seat 211; and, the first insertion slot is located below the first sealing member 20. Among them, the first sealing member 20 can specifically be an O-ring.

[0051] By making the first insertion slot located below the first sealing member 20, it is possible to first seal between the sealing structure 21 and the support frame 1, and then perform the insertion connection of the pin 3, so as to ensure a better sealing effect between the support frame 1 and the annular outer seat 211, and to avoid that when the insertion connection is performed first, the liquid is easy to enter the installation space 2132 from the first insertion slot, so as to better ensure the sealing effect inside the sealing structure 21.

[0052] Furthermore, as Figure 5As shown, the sealing structure further includes a sealing sleeve 22. The sealing sleeve 22 is sleeved on the inner seat 212, and the sealing sleeve 22 and the pin 3 do not interfere with each other in the installation space 2132. In this embodiment, the annular outer seat 211 and the inner seat 212 of the sealing structure 21 are an integrally formed structure by injection molding.

[0053] By forming the installation space 2132 between the annular outer seat 211 and the inner seat 212, while accommodating part of the structure of the pin 3, it is possible to provide space for the sealing sleeve 22, which is beneficial to installing the sealing sleeve 22 onto the inner seat 212; and it can ensure that the sealing sleeve 22 and the pin 3 do not interfere with each other in the installation space 2132.

[0054] Furthermore, as Figure 5 shown, a first stop 2122 is provided on one of the inner seat 212 and the sealing sleeve 22, and a second stop 221 is provided on the other; when the sealing sleeve 22 is sleeved onto the inner seat 212, the first stop 2122 abuts against the second stop 221, so as to avoid the sealing sleeve 22 falling off the inner seat 212 through the abutting and limiting action between the two stops, and ensure the installation stability of the sealing sleeve 22 on the inner seat 212. In this embodiment, the first stop 2122 is annularly provided on the outer peripheral surface of the inner seat 212, and the second stop 221 is annularly provided on the inner wall surface of the sealing sleeve 22.

[0055] Specifically, when the sealing sleeve 22 is sleeved onto the inner seat 212, the second stop 221 on the inner wall surface of the sealing sleeve 22 is limited in the annular card slot 2121, and the first stop 2122 abuts against the second stop 221, so as to better ensure the installation stability of the sealing sleeve 22 on the inner seat 212.

[0056] It should be noted that a processing groove 214 is provided on the annular outer seat 211, so as to be able to process the annular card slot 2121 on the part of the inner seat 212 close to the annular outer seat 211 through the processing groove 214, so that the part of the inner seat 212 far from the annular outer seat 211 forms the above-mentioned first stop 2122 to ensure the smoothness of the injection molding of the sealing structure 21.

[0057] Furthermore, as Figure 6As shown in the figure, two second through holes 1111 are provided on the support frame 1 on the same side, and the two second through holes 1111 are respectively communicated with the inside of the support frame 1, so that a second insertion slot is formed between the inside of the support frame 1 and the two second through holes 1111; and, two opposite second insertion slots are provided on the support frame 1; at the same time, an arc-shaped groove 1112 is provided on the part of the support frame 1 between the two second insertion slots, that is, the arc-shaped groove 1112 is respectively communicated with the two second through holes 1111 on different sides, so that the arc-shaped groove 1112 and the two oppositely arranged second insertion slots form the above-mentioned second insertion slot.

[0058] Specifically, as Figures 1 to 3 shown, the pin 3 is of a U-shaped structure, that is, the pin 3 includes two branch pins 31 and a connecting pin 32 connected between the two branch pins 31, and one branch pin 31 is horizontally inserted into a first insertion slot and a second insertion slot, and the connecting pin 32 is abutted and limited in the arc-shaped groove 1112, so as to realize the insertion connection between the pin 3 and the annular outer seat 211 and the support frame 1.

[0059] Furthermore, as Figure 1 and Figure 6 shown, the support frame 1 includes an upper base 11, a middle base 12, a lower base 13 and a connecting plate 15. The upper base 11 and the middle base 12, and the middle base 12 and the lower base 13 are respectively connected by a plurality of connecting plates 15, and a first through port 16 is formed between the upper base 11 and the middle base 12, a second through port 17 is formed between the middle base 12 and the lower base 13, a third through port 10 is provided at the bottom end of the lower base 13, a first connection port 18 capable of communicating or separating the first through port 16 and the second through port 17 is provided in the middle base 12, and a second connection port 19 capable of communicating or separating the second through port 17 and the third through port 10 is provided in the lower base 13; and, a second sealing member 14 as described above is sleeved and installed on the upper base 11, the middle base 12 and the lower base 13 respectively. Among them, the first through port 16, the second through port 17 and the third through port 10 can be water inlets or water outlets, which specifically need to be determined according to the actual working conditions and are not limited here.

[0060] Specifically, it is worth noting that, as Figure 1 and Figure 6 shown, the above-mentioned second insertion slot is provided on the upper base 11, that is, the above-mentioned second through holes 1111 and the arc-shaped groove 1112 are respectively provided on the upper base 11, and the annular outer seat 211 is hermetically connected in the upper base 11. The annular outer seat 211 and the upper base 11 are connected by the pin 3. During the whole working process, the annular outer seat 211 and the upper base 11 remain consistent and do not move along the Z-axis. The Z-axis direction in this embodiment is asFigure 1 The axial direction of the three-way valve core shown.

[0061] Further, as Figures 1 to 3 , Figure 6 shown, the valve core assembly 2 includes a valve stem 23 and a first seal seat 24; wherein, the valve stem 23 is slidably inserted into the inner seat 212 to achieve the sealed connection between the inner seat 212 and the valve stem 23 through the sealing effect of the seal sleeve 22; and, the first seal seat 24 is located below the inner seat 212 and connected to the valve stem 23, and the valve stem 23 can drive the first seal seat 24 to move along the Z-axis so that the first seal seat 24 blocks or opens the first connection port 18, so as to be able to cut off or connect the first through port 16 and the second through port 17 through the first connection port 18. Among them, the above actuator is connected to the valve stem 23 to drive the valve stem 23 to move along the Z-axis, and the second connection port 19 and the third through port 10 are substantially a connection port.

[0062] Further, as Figure 1 and Figure 2 shown, the valve core assembly 2 further includes a second seal seat 28, the second seal seat 28 is located below the first seal seat 24 and connected to the valve stem 23, and the valve stem 23 can synchronously drive the second seal seat 28 to move along the Z-axis when driving the first seal seat 24, so that the second seal seat 28 blocks or opens the second connection port 19, so as to be able to cut off or connect the second through port 17 and the third through port 10 through the second connection port 19.

[0063] Specifically, as Figure 1 and Figure 2 shown, the valve core assembly 2 further includes a buffer module, the buffer module includes a pressing plate 25, a mounting seat 27 and a first elastic member 26; wherein, the pressing plate 25 is fixedly sleeved on the valve stem 23 and is located below the seal sleeve 22; a part of the structure of the mounting seat 27 is connected to the first seal seat 24; one end of the first elastic member 26 is connected to the pressing plate 25, the other end of the first elastic member 26 is connected to the mounting seat 27, and the first elastic member 26 is accommodated in the first seal seat 24.

[0064] By accommodating the first elastic member 26 in the first seal seat 24, compared with the prior art in which the first elastic member 26 is arranged outside the first seal seat 24, the occupied space of the first elastic member 26 outside the first seal seat 24 can be saved, the use space inside the first seal seat 24 can be reasonably utilized, so that the structure between the first seal seat 24 and the first elastic member 26 is relatively compact, thereby making the overall structure of the three-way valve core better in compactness, and the overall height of the three-way valve core can be greatly reduced. In this embodiment, the first elastic member 26 may specifically be a spring.

[0065] By setting the first elastic member 26, when the valve stem 23 drives the pressing plate 25 and the first sealing seat 24 to move downward along the Z-axis, the first elastic member 26 and the mounting seat 27 move downward along the Z-axis synchronously as a whole with the valve stem 23; when the valve stem 23 drives the first sealing seat 24 to move to the first connection port 18, due to the small movement tolerance of the actuator, it will continue to drive the valve stem 23 to move downward along the Z-axis; at this time, the first sealing seat 24 and the mounting seat 27 remain stationary, while the valve stem 23 will drive the pressing plate 25 to press the first elastic member 26 downward along the Z-axis, so as to be able to absorb the movement tolerance applied to the valve stem 23 by the actuator through the compression of the first elastic member 26, thereby avoiding that when the first sealing seat 24 moves to the first connection port 18, due to the movement tolerance of the actuator, the first sealing seat 24 is continuously pushed to move away from the first connection port 18, ensuring the stability of the position of the first sealing seat 24 at the first connection port 18, so as to ensure a better sealing effect of the first sealing seat 24 on the first connection port 18, and further ensuring the normal use performance of the entire three-way valve core; at the same time, it can avoid damaging the first sealing seat 24 due to the movement tolerance of the valve stem 23, and can better protect the first sealing seat 24.

[0066] Further, the buffer module further includes a second elastic member (not shown in the figure), the second elastic member is sleeved on the valve stem 23, one end of the second elastic member passes through the mounting seat 27 and is connected to the first sealing seat 24, and the other end of the second elastic member is connected to the support frame 1. In this embodiment, the second elastic member may specifically be a spring.

[0067] Specifically, when the valve stem 23 moves downward along the Z-axis, the valve stem 23 can drive the first sealing seat 24 to move downward along the Z-axis at the same time, so that the first sealing seat 24 compresses the second elastic member during the movement; when the valve stem 23 no longer moves downward along the Z-axis, at this time, the elastic force of the second elastic member can drive the first sealing seat 24 and the valve stem 23 to automatically move upward along the Z-axis, so as to drive the valve stem 23 to reset upward along the Z-axis, so that the first sealing seat 24 opens the first connection port 18, and at this time, the first port 16 is communicated with the second port 17.

[0068] By sleeving the second elastic member on the valve stem 23 and making one end of the second elastic member pass through the mounting seat 27 and be connected to the first sealing seat 24, the layout of the second elastic member can be made more reasonable, the structure between the first sealing seat 24 and the second elastic member can be made more compact, so that the structural compactness of the entire three-way valve core is better, and the overall height of the three-way valve core can be further reduced.

[0069] The specific working process of the three-way valve core in this embodiment is as follows:

[0070] First, the actuator drives the valve stem 23 to move downward along the Z-axis, causing the valve stem 23 to drive the first seal seat 24 and the second seal seat 28 to synchronously move downward along the Z-axis. At this time, the first seal seat 24 moves to the first connection port 18 to cut off the first through port 16 and the second through port 17; simultaneously, the second seal seat 28 moves away from the second connection port 19 to connect the second through port 17 and the third through port 10 through the second connection port 19; at this time, the second elastic member is compressed.

[0071] After that, the actuator no longer drives the valve stem 23 to move downward along the Z-axis. At this time, due to the elastic force of the second elastic member driving the first seal seat 24, the valve stem 23, and the second seal seat 28 as a whole to move upward along the Z-axis, the first seal seat 24 moves to the first connection port 18 to connect the first through port 16 and the second through port 17 through the first connection port 18; simultaneously, the second seal seat 28 moves to the second connection port 19 to cut off the second through port 17 and the third through port 10.

[0072] It should be noted that since the first seal seat 24 moves downward along the Z-axis to the first connection port 18 under the driving action of the actuator through the drive of the valve stem 23, a first elastic member 26 needs to be provided in the first seal seat 24 to absorb the movement tolerance of the actuator, so as to ensure the position stability and sealing effect of the first seal seat 24 at the first connection port 18; while the second seal seat 28 moves to the second connection port 19 under the elastic force of the second elastic member, that is, when the elastic force of the second elastic member reaches the preset value, it no longer drives the second seal seat 28 to move upward along the Z-axis to disengage from the second connection port 19, that is, the second elastic member has no movement tolerance. Therefore, it is not necessary to provide a first elastic member 26 similar to that in the first seal seat 24 in the second seal seat 28.

[0073] In the sealing structure 21 of this embodiment, by making the annular outer seat 211 and the inner seat 212 an integrally formed structure, the processing can be simple and convenient, the cost can be relatively low, and the overall structural strength of the sealing structure 21 can be increased to ensure the smooth connection between the sealing structure 21 and the support frame 1; moreover, an installation space 2132 is formed in the sealing structure 21 to facilitate the installation of the pin 2 and the sealing sleeve 22.

[0074] In the three-way valve core of this embodiment, the pin 3 is horizontally inserted into the first insertion slot and the second insertion slot to realize the plug-in connection between the sealing structure 21 and the upper base 11 in the support frame 1. The connection method is simple and convenient, and it is easy to disassemble, and it can save the connection space and greatly reduce the height of the entire three-way valve core.

[0075] Moreover, by accommodating the first elastic member 26 in the first sealing seat 24, the use space in the first sealing seat 24 can be reasonably utilized, making the structure between the first sealing seat 24 and the first elastic member 26 relatively compact, thereby further reducing the overall height of the three-way valve core.

[0076] The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A sealing structure, used in a three-way valve core, the three-way valve core comprising a sealing structure and a supporting frame (1), characterized in that: The sealing structure is connected to the support frame (1) via a pin (3), so that a sealed partition is formed between the upper and lower spaces of the sealing structure. The sealing structure comprises: An annular outer seat (211) and an inner seat (212) arranged inside the annular outer seat (211), an installation space (2132) being formed between the annular outer seat (211) and the inner seat (212), a first plugging groove for plugging the plug pin (3) being provided on the annular outer seat (211), an insertion path of the plug pin (3) in the first plugging groove passing through the installation space (2132), and the annular outer seat (211) and the inner seat (212) being integrally formed.

2. The sealing structure according to claim 1, characterized in that: The annular outer seat (211) is provided with a processing groove (214) which is in communication with the installation space (2132).

3. Three-way valve core, characterized in that: include: A three-way valve body, the three-way valve body comprising a support frame (1) and a sealing structure as claimed in claim 1 or 2, the sealing structure further comprising an insertion pin (3), the support frame (1) being provided with a second insertion groove, the insertion pin (3) being inserted into the second insertion groove and the first insertion groove on the annular outer seat (211); The valve core assembly (2) is slidably arranged in the three-way valve body.

4. The three-way valve core according to claim 3, characterized in that: A first sealing member (20) is connected between the annular outer seat (211) and the supporting frame (1), and the first plug-in groove is located below the first sealing member (20).

5. The three-way valve core according to claim 3, characterized in that: The sealing structure also includes a sealing sleeve (22), and the inner seat (212) is used for sleeve-mounting the sealing sleeve (22). One of the inner seat (212) and the sealing sleeve (22) is provided with a first stopper (2122), and the other is provided with a second stopper (221), and the first stopper (2122) can abut against the second stopper (221).

6. The three-way valve core according to claim 3, characterized in that: The support frame (1) comprises an upper base (11), a middle base (12), a lower base (13) and a connecting plate (15); the upper base (11) and the middle base (12), as well as the middle base (12) and the lower base (13) are connected respectively via the connecting plate (15); a first opening (16) is formed between the upper base (11) and the middle base (12); a second opening (17) is formed between the middle base (12) and the lower base (13); The bottom end of the lower base (13) is provided with a third opening (10), the middle base (12) is provided with a first connecting port (18) capable of connecting or separating the first opening (16) and the second opening (17), the lower base (13) is provided with a second connecting port (19) capable of connecting or separating the second opening (17) and the third opening (10), and the second plug-in slot is provided on the upper base (11), and the annular outer seat (211) is sealed and connected to the upper base (11).

7. The three-way valve core according to claim 6, characterized in that: The valve core assembly (2) comprises: A valve stem (23) is slidably inserted into the inner seat (212); The first sealing seat (24) is located below the inner seat (212) and is connected to the valve stem (23). The valve stem (23) can drive the first sealing seat (24) to move along the Z axis so that the first sealing seat (24) blocks or opens the first connecting port (18).

8. The three-way valve core according to claim 7, characterized in that: The valve core assembly (2) further comprises: The second sealing seat (28) is located below the first sealing seat (24) and is connected to the valve stem (23). The valve stem (23) can simultaneously drive the second sealing seat (28) to move along the Z axis when driving the first sealing seat (24), so that the second sealing seat (28) blocks or opens the second connecting port (19).

9. The three-way valve core according to claim 7, characterized in that: The valve core assembly (2) further comprises a buffer module, wherein the buffer module comprises: A pressure plate (25) is fixedly sleeved on the valve stem (23); A mounting seat (27), partially connected to the first sealing seat (24); a first elastic member (26), one end of which is connected to the pressure plate (25), the other end of which is connected to the mounting seat (27), and the first elastic member (26) is accommodated in the first sealing seat (24); A second elastic member is sleeved on the valve stem (23) and one end of the second elastic member is connected to the first sealing seat (24), and the other end of the second elastic member is connected to the support frame (1). The second elastic member can drive the valve stem (23) to reset upward along the Z axis so that the first sealing seat (24) opens the first connecting port (18).

10. Three-way switching valve, characterized in that: It comprises a three-way valve core as described in any one of claims 3-9.

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