Novel reversing valve

Abstract

The invention discloses a novel reversing valve, and relates to the technical field of reversing valves. The valve core is provided with a channel A and a channel B; a channel aa, a channel ab, a channel ba, a channel bb, an injection channel C and an injection channel D are arranged on the valve body; inner flow ports of the injection channel C and the injection channel D are located in the central area of the valve body, and inner flow ports of the channel aa, the channel ab, the channel ba and the channel bb are located in the peripheral area of the valve body; the two ends of the channel A and the two ends of the channel B are connected with the inner flow opening in the center area and the inner flow opening in the peripheral area respectively. The function of matching of two reversing valves can be replaced, two injectors can be installed, one motor can be used for driving, the size is reduced, and the product cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of reversing valves, and particularly relates to a novel reversing valve. Background Art

[0002] A reversing valve can achieve the reversing and distribution of fluids, and is mainly applied to the distribution of fluids, and is widely used in industries such as food and chemical industries.

[0003] Generally, one motor can only drive one reversing valve, and only one syringe can be installed on the reversing valve. When the user's usage scenario requires two reversing valves and two syringes to work together, at this time, only a combination of two sets of motors and reversing valves can be adopted, which not only increases the cost, but also occupies a large space volume. Summary of the Invention

[0004] The purpose of the present invention is to provide a novel reversing valve in view of the defects and deficiencies of the prior art. It can replace the functions of two cooperating reversing valves, can install two syringes, is driven by one motor, reduces the volume, and reduces the product cost.

[0005] The present invention is realized through the following technical solutions:

[0006] A novel reversing valve includes a valve body and a valve core; the valve core is installed on the valve body; a channel A and a channel B are provided on the valve core; a channel aa, a channel ab, a channel ba, a channel bb, an injection channel C and an injection channel D are provided on the valve body;

[0007] One end of each of the channel aa, the channel ab, the channel ba, the channel bb, the injection channel C and the injection channel D communicates with the outside, and the other end serves as an internal flow port and communicates with other channels; among them, the internal flow ports of the injection channel C and the injection channel D are located in the central area of the valve body, and the internal flow ports of the channel aa, the channel ab, the channel ba, and the channel bb are located in the peripheral area of the valve body;

[0008] Both ends of the channel A and the channel B are respectively connected to the internal flow ports in the central area and the internal flow ports in the peripheral area.

[0009] Further, the channel A and the channel B are both grooves on the lower surface of the valve core.

[0010] Further, the channel A is a straight groove, extending from the central position of the valve core to the outside of the valve core.

[0011] Further, the channel B is a three-fork groove, and two forks of the three-fork groove face the outside of the valve core.

[0012] Further, the channel A corresponds to the channel aa and the channel ab, and the channel B corresponds to the channel ba and the bb; as the relative rotation angle between the valve core and the valve body increases, there are the following four states:

[0013] First state: The injection channels C and D are simultaneously drawn. The injection channel C, channel A, and channel aa are sequentially connected. The injection channel D, channel B, and channel ba are sequentially connected.

[0014] Second state: The injection channel C is drawn and the injection channel D is discharged. The injection channel C, channel A, and channel aa are sequentially connected. The injection channel D, channel B, and channel bb are sequentially connected.

[0015] Third state: The injection channels C and D are simultaneously discharged. The injection channel C, channel A, and channel ab are sequentially connected. The injection channel D, channel B, and channel bb are sequentially connected.

[0016] Fourth state: The injection channel C is discharged and the injection channel D is drawn. The injection channel C, channel A, and channel ab are sequentially connected. The injection channel D, channel B, and channel ba are sequentially connected.

[0017] Furthermore, an annular positioning groove is provided on the upper surface of the valve body, and the valve core is installed in the annular positioning groove. The inner flow ports of channels aa, ab, ba, bb, the injection channel C, and the injection channel D are all located within the area surrounded by the annular positioning groove.

[0018] Each inner flow port is an arc-shaped gap provided in the annular positioning groove.

[0019] Furthermore, channels aa, ab, ba, bb, the injection channel D, and the injection channel C are arranged in sequence, and channel aa is adjacent to the injection channel C.

[0020] Furthermore, the three-way slot of channel B is respectively fork m, fork l, and fork n. The end of fork n is connected to the flow port of the injection channel D. The end of fork l is normally closed in the first, second, and third states and is connected to channel ba in the fourth state. The end of fork m is connected to channel ba and channel bb respectively at different rotation angles of the valve core and the valve body.

[0021] Furthermore, the length of the connection hole ba of channel ba is less than the lengths of other connection holes.

[0022] Furthermore, it also includes a wave spring and a valve core mounting block. The valve core mounting block is installed on the top of the valve body, and the wave spring is located between the valve core mounting block and the valve core.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] Compared with the prior art where one motor can only drive one reversing valve and only one syringe can be installed on the reversing valve, this reversing valve can install two syringes and is driven by one motor, which can not only reduce the volume but also lower the product cost. Brief Description of the Drawings

[0025] Figure 1 is an exploded view of the overall structure of an embodiment of the present invention;

[0026] Figure 2 is a schematic diagram of the lower surface of the valve core of an embodiment of the present invention;

[0027] Figure 3 is a schematic diagram of the upper surface of the valve body of an embodiment of the present invention;

[0028] Figure 4 is a schematic diagram of the internal passage of the valve body of an embodiment of the present invention;

[0029] Figure 5 is a schematic diagram of the position of the internal flow port of the valve body of an embodiment of the present invention;

[0030] Figure 6 is a schematic diagram of the channel connection in the first-level state of an embodiment of the present invention;

[0031] Figure 7 is a schematic diagram of the channel connection in the second-level state of an embodiment of the present invention;

[0032] Figure 8 is a schematic diagram of the channel connection in the third-level state of an embodiment of the present invention;

[0033] Figure 9 is a schematic diagram of the channel connection in the fourth-level state of an embodiment of the present invention;

[0034] Figure 10 is a schematic diagram of the application principle of an embodiment of the present invention.

[0035] In the figure, 1. wave spring, 2. flat thrust bearing, 3. valve core positioning block, 4. valve core, 5. O-ring, 6. valve body, 7. PTFE ball, 8. valve core mounting block, 4-1. channel A, 4-2. channel B, 6-1. channel aa, 6-2. channel ab, 6-3. channel ba, 6-4. channel bb, 6-5. annular positioning groove, 6-6. injection channel D, 6-7. injection channel C, 6-1-1. internal flow port of channel aa, 6-2-2. internal flow port of channel ab, 6-3-3. internal flow port of channel ba, 6-4-4. internal flow port of channel bb, 6-5-5. annular positioning groove, 6-

[0036] 6-6. internal flow port of injection channel D, 6-7-7. internal flow port of injection channel C. Detailed Description of the Invention

[0037] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] Referring to Figure 1 , this embodiment is an improvement on the existing reversing valve, which includes a valve body 6, a valve core 4, a valve core positioning block 3, a valve core mounting block 8, a flat thrust bearing 2, a wave spring 1, an O-ring 5, and a polytetrafluoroethylene ball 7;

[0039] The valve body and the valve core are installed together, and the two have relative rotational freedom; the polytetrafluoroethylene ball is installed on the valve body. The valve core positioning block is installed in the valve core installation hole, and the flat thrust ball bearing and the wave spring are installed on the valve core in sequence. The valve core mounting block compresses the wave spring to make the flat thrust bearing, so that the valve core tightly adheres to the valve body, and the valve core mounting block is locked on the valve body by an inner hexagon socket head cap screw. An O-ring is installed on the valve core to ensure the seal between the valve core and the valve body.

[0040] Specifically referring to Figure 2 , channels A and B are provided on the upper and lower surfaces of the valve core. Among them, channel A is a straight line type, specifically a slot spanning the outer peripheral area and the central area of the valve body. Channel B is a three-fork slot, and the three-fork slot is fork m, fork l, and fork n. Among them, the end of fork n is located above the central area of the valve body; the ends of fork l and fork m are both located above the outer peripheral area of the valve body.

[0041] Specifically referring to Figure 4 , 6 interfaces are provided on the valve body. Among them, four interfaces are externally connected for liquid output or input, and the other two interfaces are used to connect syringes. The 6 interfaces respectively form channels aa, ab, ba, bb, injection channel C, and injection channel D for liquid passing inside the valve body. In this embodiment, channels aa and ba are used for liquid input, channels ab and bb are used for liquid output, and both syringe channel C and syringe channel D can achieve two liquid flow directions of liquid input and output.

[0042] Referring to Figure 3 and referring to Figure 5 , within the area surrounded by the annular positioning groove on the upper surface of the valve body, a plurality of arc-shaped slots are provided; among them, the two arc-shaped slots located in the central area are respectively the inner flow ports of injection channel C and injection channel D, and the four arc-shaped slots located in the outer peripheral area are respectively the inner flow ports of channel aa, channel ab, channel ba, and channel bb.

[0043] In this embodiment, the inner flow ports of injection channel C and injection channel D are located on the first circumference, and the inner flow ports of channel aa, channel ab, channel ba, and channel bb are located on the second circumference, and the diameter of the second circumference is greater than that of the first circumference.

[0044] Based on the relative rotation of the valve body and the valve core, different channels are connected. As the relative rotation angle between the valve core and the valve body increases, there are the following four states:

[0045] Refer to Figure 6 , first-level state, injection channel C and injection channel D simultaneously draw liquid: injection channel C, channel A, and channel aa are sequentially connected, and injection channel D, channel B, and channel ba are sequentially connected; the liquid can enter the two syringes from channel aa and channel ba respectively.

[0046] Refer to Figure 7 , second-level state: injection channel C draws liquid and injection channel D discharges liquid, injection channel C, channel A, and channel aa are sequentially connected, and injection channel D, channel B, and channel bb are sequentially connected; the liquid can enter syringe C from channel aa, and the liquid in syringe D can be discharged through channel bb.

[0047] Refer to Figure 8 , third-level state: injection channel C and injection channel D discharge simultaneously, injection channel C, channel A, and channel ab are sequentially connected, and injection channel D, channel B, and channel bb are sequentially connected; the liquids in the two syringes can be discharged through channel ab and channel bb respectively.

[0048] Refer to Figure 9 , fourth-level state: injection channel C discharges and injection channel D draws, injection channel C, channel A, and channel ab are sequentially connected, and injection channel D, channel B, and channel ba are sequentially connected. The liquid can enter syringe D from channel ba, and the liquid in syringe C can be discharged through channel ab.

[0049] In the above states, the bifurcated n end of channel B is connected to the flow port of injection channel D, the bifurcated l end is normally closed in the first-level, second-level, and third-level states, and is connected to channel ba in the fourth-level state; the bifurcated m end is connected to channel ba in the first-level state, and is connected to channel bb in the second and third levels.

[0050] In this embodiment, the bifurcated l of channel B has an arc segment, and the arc slot length of channel ba is less than the lengths of the other three channels on the same circumference.

[0051] The setting of the rotation angle and the rotation timing sequence of the above four states can achieve continuous injection through two syringes and a reversing valve. Refer to Figure 10, the liquid inlet channels aa and ba are connected by a Y-shaped tube, and the liquid outlet channels ab and bb are connected by another Y-shaped tube. Through the adjustment of the motor on the reversing valve and the adjustment of the syringe speed of the syringe, continuous and stable liquid output is achieved.

[0052] It should be noted that the above is only a preferred application example of the present invention and is not intended to limit the protection scope of the present invention. All technical solutions using equivalent replacements or equivalent transformation forms are within the protection scope of the present invention.

Claims

1. A new type of reversing valve, comprising a valve body and a valve core; the valve core is mounted on the valve body; characterized in that: The valve core is provided with a channel A and a channel B; the valve body is provided with a channel aa, a channel ab, a channel ba, a channel bb and an injection channel C and an injection channel D; The channels aa, ab, ba, bb, injection channel C and injection channel D are all connected to the outside at one end, and the other end is connected to other channels as an internal flow port; wherein the internal flow ports of injection channel C and injection channel D are located in the central area of ​​the valve body, and the internal flow ports of channels aa, ab, ba and bb are located in the peripheral area of ​​the valve body; Both ends of the channel A and the channel B are connected to the inner flow opening in the central area and the inner flow opening in the peripheral area respectively.

2. A new type of reversing valve according to claim 1, characterized in that: The channel A and the channel B are both grooves on the lower surface of the valve core.

3. A new type of reversing valve according to claim 2, characterized in that: The channel A is a linear slot extending from the center of the valve core to the outside of the valve core.

4. A new type of reversing valve according to claim 2, characterized in that: The channel B is a three-forked slot, wherein two forks of the three-forked slot face the outside of the valve core.

5. A new type of reversing valve according to claim 1, characterized in that: The channel A corresponds to the channel aa and the channel ab, and the channel B corresponds to the channel ba and the channel bb; as the relative rotation angle between the valve core and the valve body increases, there are the following four states: In the primary state, injection channel C and injection channel D are extracted simultaneously, injection channel C, channel A and channel aa are connected in sequence, and injection channel D, channel B and channel ba are connected in sequence; Secondary state: injection channel C draws and injection channel D discharges, injection channel C, channel A and channel aa are connected in sequence, and injection channel D, channel B and channel bb are connected in sequence; Level 3 state: injection channel C and injection channel D are discharged simultaneously, injection channel C, channel A and channel ab are connected in sequence, and injection channel D, channel B and channel bb are connected in sequence; Level 4 state: injection channel C discharges and injection channel D draws, injection channel C, channel A and channels ab are connected in sequence, and injection channel D, channel B and channel ba are connected in sequence.

6. A new type of reversing valve according to claim 1, characterized in that: The upper surface of the valve body is provided with an annular positioning groove, and the valve core is installed in the annular positioning groove; the inner flow openings of the channels aa, ab, ba, bb, injection channels C and injection channels D are all located in the area surrounded by the annular positioning groove; Each inner flow opening is an arc-shaped gap arranged in the annular positioning groove.

7. A new type of reversing valve according to claim 1, characterized in that: The channel aa, channel ab, channel ba, channel bb, injection channel D and injection channel C are arranged in sequence, and channel aa and injection channel C are adjacent.

8. A new type of reversing valve according to claim 5, characterized in that: The three-fork grooves of the channel B are respectively fork m, fork l and fork n, wherein the end of fork n is connected to the flow outlet of the injection channel D, the end of fork l is normally closed in the first state, the second state and the third state, and is connected to channel ba in the fourth state; the end of fork m is connected to channel ba and channel bb respectively at different rotation angles of the valve core and the valve body.

9. A new type of reversing valve according to claim 6, characterized in that: The length of the connecting hole ba of the channel ba is smaller than the lengths of the other connecting holes.

10. A new type of reversing valve according to claim 1, characterized in that: It also includes a wave spring and a valve core installation block; the valve core installation block is installed on the top of the valve body, and the wave spring is located between the valve core installation block and the valve core.

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