Three-way valve element and three-way switching valve

Abstract

The utility model discloses a three-way valve element and a three-way switching valve, and belongs to the technical field of valves. The three-way valve element comprises a three-way valve body with an inner cavity and a valve element assembly arranged in the inner cavity, the three-way valve body comprises a supporting frame and a sealing structure, the inner cavity is formed in the supporting frame, the sealing structure comprises a blocking table and a first sealing seat, and the blocking table is arranged at the bottom of the inner cavity in the circumferential direction of the inner wall of the inner cavity; the first sealing seat is arranged on the baffle table and is supported by the baffle table; the sealing structure further comprises a clamping piece, an annular clamping groove used for containing the clamping piece is formed in the inner wall of the inner cavity in the circumferential direction, and after the clamping piece is arranged in the annular clamping groove, the first sealing base can abut against the blocking table. According to the three-way valve element, the first sealing seat is fixedly installed between the annular blocking table and the clamping piece which are matched with each other, connection between the first sealing seat and the supporting frame is achieved, the connection mode is simple and convenient, disassembly is easy, the installation space can be saved, and the overall height of the three-way valve element is reduced.

Description

Technical Field

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

[0002] In a three-way valve core, a support frame in a three-way valve body and a sealing seat (valve cover) are usually connected into an integral structure by means of threaded connection, so that the sealing seat can seal the support frame. However, since the threaded connection method is relatively cumbersome and difficult to disassemble, and a large installation space is required during the threaded connection process, the setting distance between the sealing seat and the support frame is relatively large, resulting in a relatively high overall height of the three-way valve core.

[0003] Aiming at the above problems, a three-way valve core and a three-way switching valve are urgently needed to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a three-way valve core and a three-way switching valve, so that the connection between the support frame and the first sealing seat is relatively simple and convenient, and the installation space can be saved to reduce the overall height of the three-way valve core.

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

[0006] A three-way valve core, comprising: a three-way valve body with an inner cavity and a valve core assembly arranged in the inner cavity, the three-way valve body comprising a support frame and a sealing structure, the inner cavity being arranged in the support frame, the sealing structure comprising a stop and a first sealing seat, the stop being arranged along the circumferential direction of the inner wall at the bottom of the inner cavity, and the first sealing seat being arranged on the stop and supported by the stop.

[0007] The sealing structure further comprises a clamping member, and an annular clamping groove for placing the clamping member is arranged along the circumferential direction of the inner wall of the inner cavity. After the clamping member is placed in the annular clamping groove, the first sealing seat can be pressed tightly against the stop.

[0008] As an optional solution, the clamping member is a snap ring or a retaining ring.

[0009] As an optional solution, the first sealing seat comprises:

[0010] An annular base, the bottom end of the annular base is placed on the stop and supported by the stop, and the clamping member is pressed against the top end of the annular base;

[0011] A convex seat, protruding from the bottom end of the annular base along the Z axis, and the convex seat is arranged along the Z axis in the inner cavity.

[0012] As an alternative, the annular base and the convex seat are integrally formed.

[0013] As an alternative, an annular groove is provided on the annular base, the annular groove is located between the top end and the bottom end of the annular base, and the annular groove is used for sleeving a first seal.

[0014] As an alternative, the sealing structure further includes a sealing sleeve, the sealing sleeve is installed outside the convex seat, and the sealing sleeve abuts against the bottom end of the annular base.

[0015] As an alternative, the support frame includes:

[0016] An upper base, a middle base, a lower base and a connecting plate. The retaining table is arranged at the bottom inside the upper base. 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, 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 arranged inside the middle base, and a second connection port capable of communicating or separating the second through port and the third through port is arranged inside the lower base.

[0017] As an alternative, the valve core assembly further includes:

[0018] A valve stem, which is slidably inserted into the first seal seat;

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

[0020] As an alternative, the valve core assembly further includes:

[0021] A third seal seat, which is located below the second seal seat and connected to the valve stem. The valve stem can drive the third seal seat to move along the Z-axis synchronously when driving the second seal seat so that the third seal seat blocks or opens the second connection port.

[0022] A three-way switching valve, which includes an outer valve body, an actuator and the three-way valve core as described above. The actuator is connected to the valve stem in the three-way valve core to drive the valve stem to move along the Z-axis, and the outer valve body is connected to the support frame in the three-way valve core.

[0023] The beneficial effects of the present utility model are:

[0024] By arranging the first sealing seat in the inner cavity of the support frame, placing the first sealing seat on the retaining platform at the bottom of the inner cavity and being supported by the retaining platform, and enabling the clamping member to be placed in the annular clamping groove on the inner wall of the inner cavity and then pressing the first sealing seat against the retaining platform, the first sealing seat is fixedly installed between the mutually cooperating retaining platform and the clamping member, realizing the connection between the first sealing seat and the support frame; 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 the cooperation of the retaining platform and the clamping member does not require a large installation space, the structure between the first sealing seat and the support frame is relatively compact, thereby being able to reduce the overall height of the three-way valve core. Brief Description of the Drawings

[0025] Figure 1 is a schematic structure of the three-way valve core provided by the present utility model (excluding the elastic member, the second sealing seat is separated from the first connection port, and the third sealing seat seals the second connection port) Figure 1 ;

[0026] Figure 2 is a cross-sectional view of the three-way valve core provided by the present utility model (the second sealing seat is separated from the first connection port, and the third sealing seat seals the second connection port);

[0027] Figure 3 is a schematic structure of the three-way valve core provided by the present utility model (the clamping member is pressed onto the annular base) Figure 2 ;

[0028] Figure 4 is a schematic structural diagram of the support frame provided by the present utility model;

[0029] Figure 5 is a schematic structure of the three-way valve core provided by the present utility model (the annular base is placed on the retaining platform) Figure 3 ;

[0030] Figure 6 is a schematic structure of the first sealing seat provided by the present utility model (with the clamping member pressed thereon) Figure 1 ;

[0031] Figure 7 is a schematic structure of the first sealing seat provided by the present utility model (with the clamping member pressed thereon) Figure 2 .

[0032] Description of the Reference Numerals:

[0033] 1 - Support frame; 11 - Upper base; 111 - Retaining platform; 112 - Annular clamping groove; 12 - Middle base; 13 - Lower base; 14 - Second sealing member; 15 - Connecting plate; 16 - First through port; 17 - Second through port; 18 - First connection port; 19 - Second connection port; 10 - Third through port;

[0034] 21 - First sealing seat; 211 - Annular base; 212 - Convex seat; 213 - Annular groove; 22 - Sealing sleeve; 3 - Clamping part;

[0035] 23 - Valve stem; 24 - Second sealing seat; 28 - Third sealing seat; 29 - Elastic part. Detailed implementation mode

[0036] All features disclosed in this specification, or steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can be combined in any way.

[0037] 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 in a series of equivalent or similar features. Throughout the specification, the same reference numerals indicate the same elements.

[0038] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present utility model clearer, the technical solutions of the present utility model will be further described below with reference to the drawings and through specific implementation modes.

[0039] In this embodiment, a three-way valve core and a three-way switching valve including the three-way valve core are proposed. The three-way switching valve further includes an outer valve body and an actuator, the actuator is connected to the three-way valve core, and the outer valve body is fixedly connected outside the three-way valve core. 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.

[0040] Specifically, as Figures 1 to 4 shown, the three-way valve core includes a three-way valve body with an inner cavity and a valve core assembly arranged in the inner cavity of the three-way valve body; among them, the three-way valve body includes a support frame 1 and a sealing structure. The above-mentioned inner cavity is arranged in the support frame 1. The sealing structure includes a retaining table 111 and a first sealing seat 21. The retaining table 111 is arranged circumferentially along the inner wall of the bottom of the inner cavity, and the first sealing seat 21 is arranged on the retaining table 111 and supported by the retaining table 111; the sealing structure further includes a clamping part 3. An annular clamping groove 112 for placing the clamping part 3 is arranged circumferentially along the inner wall of the inner cavity. After the clamping part 3 is placed in the annular clamping groove 112, it can press the first sealing seat 21 tightly against the retaining table 111. Among them, during the entire working process, the first sealing seat 21 and the support frame 1 both do not move along the Z-axis. The Z-axis direction in this embodiment is the axial direction of the three-way valve core as Figure 2 shown.

[0041] In this embodiment, the three-way valve core changes the connection method between the support frame 1 and the first sealing seat 21 compared with the prior art. By arranging the first sealing seat 21 in the inner cavity of the support frame 1, placing the first sealing seat 21 on the retaining platform 111 at the bottom of the inner cavity and being supported by the retaining platform 111, and enabling the clamping member 3 to be placed in the annular clamping groove 112 on the inner wall of the inner cavity and then pressing the first sealing seat 21 against the retaining platform 111, so that the clamping member 3 is pressed against the first sealing seat 21, the first sealing seat 21 can be fixedly installed between the mutually cooperating retaining platform 111 and the clamping member 3, realizing the connection between the first sealing seat 21 and the support frame 1, and making the first sealing seat 21 and the support frame 1 connected to form 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 using the cooperation of the retaining platform 111 and the clamping member 3 does not require a large installation space, the structure between the first sealing seat 21 and the support frame 1 is relatively compact, thereby reducing the overall height of the three-way valve core.

[0042] Specifically, the clamping member 3 can be a snap ring or a snap ring. Here, the specific structure of the clamping member 3 is not limited, as long as the first sealing seat 21 can be pressed against the retaining platform 111 through the clamping member 3.

[0043] Further, as Figures 3 to 7 shown, the first sealing seat 21 includes an annular base 211 and a convex seat 212. Among them, the bottom end of the annular base 211 is placed on the retaining platform 111 and supported by the retaining platform 111, and the clamping member 3 presses against the top end of the annular base 211, so as to fix the annular base 211 to the support frame 1 through the clamping member 3 and the retaining platform 111, thereby realizing the fixed connection of the first sealing seat 21 in the support frame 1. The convex seat 212 protrudes from the bottom end of the annular base 211 along the Z axis, and the convex seat 212 is arranged in the inner cavity along the Z axis, so that the convex seat 212 does not interfere with the operation of placing the annular base 211 on the retaining platform 111.

[0044] Specifically, as Figure 6 and Figure 7 shown, the annular base 211 and the convex seat 212 are integrally formed. On the one hand, it can make the processing of the first sealing seat 21 relatively simple and convenient, with low cost. On the other hand, it can increase the structural strength of the first sealing seat 21 through the integrally formed structure, making the working stability and reliability of the first sealing seat 21 relatively high. In other embodiments, the annular base 211 and the convex seat 212 can also be of a split structure.

[0045] Further, as Figure 6 and Figure 7As shown in the figure, an annular groove 213 is provided on the annular base 211. The annular groove 213 is located between the top end and the bottom end of the annular base 211, and the annular groove 213 is used to sleeved with the first seal, so that the first seal can seal the annular base 211 and the support frame 1, avoiding the generation of a gap between the first seal seat 21 and the support frame 1. In this embodiment, the first seal may specifically be an O-ring.

[0046] As Figure 3 and Figure 5 shown in the figure, by using the above-mentioned mutually cooperating retaining platform 111 and the engaging member 3, the connection between the support frame 1 and the first seal seat 21 is realized, so that the size of the first seal seat 21 is smaller, and there is no need to additionally provide a structure for connecting with the support frame 1 on the first seal seat 21. It only needs to ensure that the height of the annular base 211 can guarantee the setting space of the annular groove 213, so that the overall height of the entire first seal seat 21 can be greatly reduced, and then the height of the entire three-way valve core is lower.

[0047] Furthermore, as Figures 5 to 7 shown in the figure, the sealing structure further includes a sealing sleeve 22. The sealing sleeve 22 is installed outside the convex base 212, and the sealing sleeve 22 abuts against the bottom end of the annular base 211, so as to meet the installation requirement of the sealing sleeve 22 on the convex base 212 while reducing the overall height of the first seal seat 21.

[0048] Specifically, as Figures 1 to 5 shown in the figure, the support frame 1 includes an upper base 11, a middle base 12, a lower base 13 and a connecting plate 15; wherein, the retaining platform 111 is provided at the bottom inside the upper base 11, and the engaging member 3 is located inside the upper base 11; between the upper base 11 and the middle base 12, and between the middle base 12 and the lower base 13 are respectively connected by a plurality of connecting plates 15 to form the above-mentioned inner cavity among the upper base 11, the middle base 12, the lower base 13 and the connecting plate 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, and a first connection port 18 capable of connecting or separating the first through port 16 and the second through port 17 is provided inside the middle base 12, and a second connection port 19 capable of connecting or separating the second through port 17 and the third through port 10 is provided inside the lower base 13; and, the outer valve body is fixedly connected to the outside of the support frame 1, and second seals 14 are respectively sleeved and installed on the upper base 11, the middle base 12 and the lower base 13 to realize the sealed connection between the support frame 1 and the outer valve body. 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. In this embodiment, the second seal 14 may specifically be an O-ring.

[0049] Further, as Figures 1 to 5 shown, the spool assembly further includes a valve stem 23 and a second seal seat 24; wherein, the valve stem 23 is slidably inserted into the first seal seat 21, the second seal seat 24 and the above-mentioned seal sleeve 22, so as to realize the sealed connection between the convex seat 212 and the valve stem 23 through the sealing effect of the seal sleeve 22; and, the second seal seat 24 is located below the first seal seat 21 and connected to the valve stem 23, and the valve stem 23 can drive the second seal seat 24 to move along the Z-axis, so that the second seal seat 24 blocks or opens the first connection port 18, so as to be able to realize the partition or communication between the first through port 16 and the second through port 17 through the first connection port 18. Wherein, the above-mentioned 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 through port.

[0050] Further, as Figure 2 shown, the spool assembly further includes an elastic member 29, the elastic member 29 is sleeved on the valve stem 23, one end of the elastic member 29 is connected to the second seal seat 24, and the other end of the elastic member 29 is connected to the support frame 1. In this embodiment, the elastic member 29 can specifically be a spring.

[0051] Specifically, when the valve stem 23 moves downward along the Z-axis, the valve stem 23 can drive the second seal seat 24 to move downward along the Z-axis at the same time, so that the second seal seat 24 compresses the elastic member 29 during the movement; when the valve stem 23 no longer moves downward along the Z-axis, at this time, the elastic force of the elastic member 29 can drive the second seal seat 24 and the valve stem 23 to automatically move upward along the Z-axis, so as to be able to drive the valve stem 23 to reset upward along the Z-axis, so that the second seal seat 24 opens the first connection port 18, so that the first through port 16 is connected to the second through port 17.

[0052] By sleeving the elastic member 29 on the valve stem 23 and connecting one end of the elastic member 29 to the second seal seat 24, the layout of the elastic member 29 can be made more reasonable, the structure between the second seal seat 24 and the elastic member 29 can be made more compact, so that the structural compactness of the entire three-way spool is better, and the overall height of the three-way spool can be further reduced.

[0053] Further, as Figures 1 to 5 shown, the spool assembly further includes a third seal seat 28, the third seal seat 28 is located below the second seal seat 24 and connected to the valve stem 23, and the valve stem 23 can drive the third seal seat 28 to move along the Z-axis synchronously when driving the second seal seat 24, so that the third seal seat 28 blocks or opens the second connection port 19, so as to be able to realize the partition or communication between the second through port 17 and the third through port 10 through the second connection port 19.

[0054] The specific working process of the three-way spool in this embodiment is as follows:

[0055] First, the actuator drives the valve stem 23 to move downward along the Z-axis, causing the valve stem 23 to drive the second sealing seat 24 and the third sealing seat 28 to move downward synchronously along the Z-axis. At this time, the second sealing seat 24 moves to the first connection port 18 to cut off the first through port 16 and the second through port 17; meanwhile, the third sealing 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 elastic member 29 is compressed.

[0056] 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 elastic member 29, the second sealing seat 24, the valve stem 23, and the third sealing seat 28 as a whole move upward along the Z-axis, causing the second sealing seat 24 to move 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; meanwhile, the third sealing seat 28 moves to the second connection port 19 to cut off the second through port 17 and the third through port 10.

[0057] In the three-way valve core of this embodiment, the first sealing seat 21 and the support frame 1 are fixedly connected into an integral structure by using the mutually cooperating retaining platform 111 and the clamping member 3. This connection method can save installation space. It only requires that the first sealing seat 21 can meet the installation space for the first sealing member, greatly reducing the height of the first sealing seat 21, thereby reducing the overall height of the three-way valve core. Moreover, the connection method is simple and convenient, facilitating disassembly.

[0058] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, based on 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. Three-way valve core, characterized in that: include: A three-way valve body having an inner cavity and a valve core assembly arranged in the inner cavity, the three-way valve body comprising a support frame (1) and a sealing structure, the inner cavity being arranged in the support frame (1), the sealing structure comprising a stopper (111) and a first sealing seat (21), the stopper (111) being arranged at the bottom of the inner cavity along the circumference of the inner wall thereof, the first sealing seat (21) being arranged on the stopper (111) and supported by the stopper (111), The sealing structure further comprises a clamping member (3); an annular clamping groove (112) for accommodating the clamping member (3) is circumferentially arranged on the inner wall of the inner cavity; and after the clamping member (3) is placed in the annular clamping groove (112), the first sealing seat (21) can be pressed tightly against the stop platform (111).

2. The three-way valve core according to claim 1, characterized in that: The clamping member (3) is a clamping ring or a clamping ring.

3. The three-way valve core according to claim 1, characterized in that: The first sealing seat (21) comprises: An annular base (211), the bottom end of the annular base (211) is placed on the stop platform (111) and supported by the stop platform (111), and the clamping member (3) is pressed against the top end of the annular base (211); The convex seat (212) is convexly arranged at the bottom end of the annular base (211) along the Z axis, and the convex seat (212) is arranged in the inner cavity along the Z axis.

4. The three-way valve core according to claim 3, characterized in that: The annular base (211) and the convex seat (212) are integrally formed.

5. The three-way valve core according to claim 3, characterized in that: An annular groove (213) is provided on the annular base (211), the annular groove (213) is located between the top end and the bottom end of the annular base (211), and the annular groove (213) is used for sleeve-mounting a first sealing member.

6. The three-way valve core according to claim 3, characterized in that: The sealing structure further comprises a sealing sleeve (22), wherein the sealing sleeve (22) is mounted outside the convex seat (212), and the sealing sleeve (22) abuts against the bottom end of the annular base (211).

7. The three-way valve core according to any one of claims 1 to 6, 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), wherein the stopper (111) is arranged at the bottom of the upper base (11), 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), and a first opening (16) is formed between the upper base (11) and the middle base (12), and the middle base (12) and the lower base (13) are connected via the connecting plate (15). A second opening (17) is formed between the middle seat (12) and the lower base (13); a third opening (10) is provided at the bottom end of the lower base (13); a first connecting port (18) capable of connecting or separating the first opening (16) and the second opening (17) is provided in the middle base (12); and a second connecting port (19) capable of connecting or separating the second opening (17) and the third opening (10) is provided in the lower base (13).

8. The three-way valve core according to claim 7, characterized in that: The valve core assembly also includes: A valve stem (23) is slidably inserted into the first sealing seat (21); The second sealing seat (24) is located below the first sealing seat (21) and is connected to the valve stem (23), and the valve stem (23) can drive the second sealing seat (24) to move along the Z axis so that the second sealing seat (24) blocks or opens the first connecting port (18).

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

10. Three-way switching valve, characterized in that: It comprises an outer valve body, an actuator and a three-way valve core as described in any one of claims 1 to 9, wherein the actuator is connected to a valve stem (23) in the three-way valve core to drive the valve stem (23) to move along the Z axis, and the outer valve body is connected to a supporting frame (1) in the three-way valve core.

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