Sealing structure of multi-way valve element for agricultural irrigation

Abstract

The utility model provides a sealing structure of a multi-way valve core for agricultural irrigation. The sealing structure comprises a valve body, a core body and a first sealing ring, the core body is arranged in the valve body; the first sealing ring is arranged on the peripheral wall of the core body; at least one water outlet is formed in the outer wall of the valve body around the axial direction of the core body; the core body extends in the axial direction of the core body to form a cylinder or a conical cylinder, a window is formed in the outer wall of the core body around the axial direction of the core body, the valve body rotates relative to the valve body in a shaft mode, the window can be communicated with at least one water outlet, and water conveyed into the core body is discharged out of the valve body through the window and the water outlets in sequence; the at least one sealing ring is arranged around the window and frames the window; the cylindrical core body is adopted, and the sealing ring is arranged on the outer wall of the core body, so that the size of the valve body is greatly reduced, the using amount of the sealing ring is reduced, and compared with ball valve equipment, the structure is simpler, the size is small, and maintenance is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural irrigation, in particular to a sealing structure of a multi-channel valve core for agricultural irrigation. Background Art

[0002] In order to realize the large-scale drip irrigation system under film on farmland, the quality of agricultural irrigation valves is very important. At present, the multi-way water valves on the market generally use ball valves, which open channels in the spherical core and select the connected channels by rotating the ball valve.

[0003] However, in order to ensure the smooth rotation of the spherical core inside the ball valve, the gap between the spherical core and the inner wall of the valve body is larger than that of other types of water valves, which makes it easier for the water in the water outlet passage during irrigation to flow back into the gap between the core and the valve body, causing damage to the water valve equipment. Therefore, in order to ensure the sealing between the spherical core and the inner wall of the valve body, and to limit the spherical core to prevent the position of the spherical core from shifting up and down or left and right during rotation, a sealing ring is generally provided inside the water outlet passage of the valve body. For example, the utility model patent CN215522335U discloses a sealing structure for a short water outlet pipe of an irrigation ball valve. The structure of the sealing ring clamping and fixing part of each water outlet short interface of the ball valve is complex, and multiple sealing rings are provided; the sealing rings inside the water outlets of multiple passages clamp the spherical core to prevent its position from shifting during rotation. This results in a complex structure of the multi-channel ball valve equipment, a large equipment volume, and difficulty in maintenance. Utility Model Content

[0004] In view of this, the utility model proposes a sealing structure of a multi-channel valve core for agricultural irrigation, which is used to solve the problem that sealing rings need to be set inside multiple water outlet channels of the ball valve, resulting in a complex ball valve structure, a large volume, and inconvenient installation and maintenance.

[0005] The technical solution of the utility model is realized as follows: The utility model provides a sealing structure for a multi-channel valve core for agricultural irrigation, including a valve body with a hollow interior; a core body disposed within the valve body and axially rotatable relative to the valve body; at least one first sealing ring disposed on the outer peripheral wall of the core body and filling the space between the outer peripheral wall of the core body and the inner wall of the valve body; at least one second sealing ring disposed on the portion of the outer peripheral wall of the core body other than the window and filling the space between the outer peripheral wall of the core body and the inner wall of the valve body; wherein, at least one water outlet is axially formed on the outer wall of the valve body around the core body; the core body extends axially into a cylindrical or conical shape, and a window is axially formed on the outer wall of the core body, the window is square, the core body rotates axially relative to the valve body and can connect the window with at least one water outlet, and the water delivered into the core body is discharged out of the valve body through the window and the water outlet in sequence; at least one first sealing ring surrounds the window and frames the window; at least one second sealing ring is disposed adjacent to at least one side of one of the first sealing rings along the axial direction of the core body, the second sealing ring is disposed on the portion between two windows, and the second sealing ring is used to limit the water from entering the space between the outer peripheral wall of the core body and the inner wall of the valve body when the core body rotates axially; the first sealing ring and the second sealing ring have the same shape and size, and one of the first sealing rings is integrally formed with at least one of the second sealing rings adjacent to it and presents a figure-eight shape.

[0006] More preferably, at least two second sealing rings are respectively disposed adjacent to both sides of one of the first sealing rings along the axial direction of the core body.

[0007] More preferably, the axial lengths of the first sealing ring and the second sealing ring along the core body are the same as the axial length of the core body.

[0008] Based on the above technical solution, preferably, a water inlet is provided on one end face of the valve body along the axial direction of the core body, and the water inlet is connected to the interior of the valve body; a through hole is formed on the end face of the core body facing the water inlet, and the through hole is connected to the water inlet, and a channel is formed inside the core body, and both ends of the channel are respectively connected to the through hole and the window.

[0009] More preferably, there are four water outlets, and the four water outlets are axially arranged on the outer wall of the valve body around the core body and are simultaneously connected to the interior of the valve body.

[0010] More preferably, the four water outlets are evenly axially arranged on the outer wall of the valve body around the core body.

[0011] More preferably, the four water outlets are arranged in pairs symmetrically, and the included angle between the axials of two adjacent water outlets is less than ninety degrees or greater than ninety degrees and less than one hundred and eighty degrees.

[0012] Based on the above technical solution, preferably, the width of the window is one-eighth of the perimeter of the inscribed regular octagon of the radial cross-sectional shape of the core body.

[0013] The sealing structure of a multi-channel valve core for agricultural irrigation of the utility model has the following beneficial effects compared with the prior art:

[0014] (1) The utility model adopts a columnar core body and arranges a sealing ring on the outer wall of the core body, thereby greatly reducing the volume of the valve body and the amount of sealing ring used. Compared with the ball valve equipment, the structure is simpler, the volume is small, and it is easy to maintain.

[0015] (2) The utility model frames the water outlet window with a first sealing ring, and arranges the second sealing ring close to at least one side of the first sealing ring, thereby preventing water from entering the gap between the core body and the valve body and causing water leakage when the core body rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a three-dimensional diagram of the multi-channel valve of the utility model;

[0018] Figure 2 It is a top cross-sectional view of the multi-channel valve of the utility model;

[0019] Figure 3 This is a front view of the valve core of the utility model;

[0020] Figure 4 It is a front view of another embodiment of the valve core of the utility model;

[0021] Figure 5 It is a top cross-sectional view of the multi-channel valve of the utility model;

[0022] Figure 6 It is a top cross-sectional view of the multi-channel valve of the utility model in use;

[0023] Figure 7 A top cross-sectional view of another embodiment of the multi-channel valve of the utility model;

[0024] Figure 8 A top sectional view of another embodiment of the multi-channel valve of the utility model;

[0025] Fig. 9 A top sectional view of another embodiment of the multi-channel valve of the utility model;

[0026] Fig.10A top cross-sectional view of another embodiment of the multi-channel valve of the utility model;

[0027] Fig.11 It is a three-dimensional exploded view of the multi-channel valve of the utility model.

[0028] In the figure: 1. valve body; 11. water outlet; 12. water inlet; 2. core body; 201. window; 202. through hole; 203. channel; 3. first sealing ring; 4. second sealing ring. DETAILED DESCRIPTION

[0029] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Embodiment 1:

[0031] like Figure 1 As shown, combined Figure 2 and Fig.11 The utility model discloses a sealing structure of a multi-channel valve core for agricultural irrigation, comprising a valve body 1, a core body 2 and a first sealing ring 3.

[0032] The valve body 1 is hollow inside; at least one water outlet 11 is provided on the outer wall of the valve body 1 around the axial direction of the core body 2; a water inlet 12 is provided on one end surface of the valve body 1 along the axial direction of the core body 2, and the water inlet 12 is connected to the inside of the valve body 1. The water inlet 12 and the water outlet 11 are actually short interface pipes.

[0033] The core body 2 is arranged in the valve body 1 and rotates axially relative to the valve body 1; a window 201 is provided on the outer wall of the core body 2 around the axial direction of the core body 2, and the window 201 is square. The core body 2 rotates axially relative to the valve body 1 and can make the window 201 communicate with at least one water outlet 11, and make the water transported into the core body 2 be discharged out of the valve body 1 through the window 201 and the water outlet 11 in sequence. A through hole 202 is provided on the end surface of the core body 2 facing the water inlet 12, and the through hole 202 is connected to the water inlet 12. A channel 203 is provided in the core body 2, and the two ends of the channel 203 are respectively connected to the through hole 202 and the window 201. The channel 203 is generally a right-angled channel 203 in the ball valve. In this embodiment, the core body 2 can be an internal hollow structure, and the hollow interior is the channel 203.

[0034] In addition, there is a rotating shaft with one end fixed on the end surface of the core body 2 away from the through hole 202 and the other end extending along the axial direction of the core body 2 and passing through the valve body 1 to the external environment, and the axial direction of the rotating shaft coincides with the axial direction of the core body 2. An actuator is installed on the free end of the rotating shaft, and the rotating shaft drives the core body 2 to rotate under the operation of the actuator.

[0035] Compared with the traditional ball valve, the core body 2 in this embodiment extends along its axial direction into a cylindrical or conical cylindrical shape. In order for the ball core of the ball valve to rotate smoothly, the gap between its spherical surface and the inner wall of the valve body 1 is relatively large. The reason is that when the ball core rotates, it will have a certain position deviation in six directions: up, down, left, right, front and back. Therefore, it is necessary to set a seal inside each water outlet 11 of the ball valve, which not only plays a sealing role, but also can limit the ball core to a certain extent to avoid its position deviation. This results in a larger volume of the ball valve and a larger gap between the spherical surface and the inner wall of the valve body 1. The present embodiment adopts a cylindrical core body 2, which will basically only have a positional displacement in the up and down directions when rotating, and the displacement in the front and rear action directions can be ignored. It is only necessary to press the core body 2 from the top to eliminate the positional displacement of the core body 2 in the up and down directions as much as possible. Therefore, the gap between the core body 2 and the inner wall of the valve body 1 is also small, and the volume of the water valve is also relatively small. In addition, since there is no need to consider limiting the core body 2, the seal can be set on the core body 2, which greatly reduces the use of the seal, and further makes the volume of the water valve smaller than that of the ball valve.

[0036] As described above, at least one first sealing ring 3 is arranged on the outer peripheral wall of the core body 2 and fills between the outer peripheral wall of the core body 2 and the inner wall of the valve body 1; the first sealing ring 3 is arranged around the window 201 and frames the window 201. Compared with the ball valve, which requires sealing rings to be arranged inside each outlet short pipe, the number of sealing rings used in this embodiment is relatively small, which can further reduce the volume of the multi-way valve and reduce the friction between the valve body 1 and the core body 2.

[0037] Embodiment 2:

[0038] On the basis of the first embodiment, although the first sealing ring 3 is provided on the core body 2, combined with Figure 5 When the window 201 is connected to the water outlet 11, the first sealing ring 3 can play a sealing role; but when the core 2 rotates, the combination Figure 6 , the window 201 is staggered with the water outlet 11, and the water flowing out of the water outlet 11 will flow back and enter between the core body 2 and the inner wall of the valve body 1, thereby causing water leakage.

[0039] To solve this problem, Figure 1 As shown, combined Figure 3 , and also includes a second sealing ring 4.

[0040] Among them, at least one second sealing ring 4 is arranged on the outer peripheral wall of the core body 2 except for the window 201 and is filled between the outer peripheral wall of the core body 2 and the inner wall of the valve body 1. The second sealing ring 3 is used to limit water from entering between the outer peripheral wall of the core body 2 and the inner wall of the valve body 1 when the core body 2 rotates. The first sealing ring 3 and the second sealing ring 4 have the same shape and size. At least one second sealing ring 4 is arranged adjacent to at least one side of one of the first sealing rings 3 along the axial direction of the core body 2. The second sealing ring 4 is arranged on the part between the two windows 201. In order to reduce the number of sealing rings used, the second sealing ring 4 can be arranged only on one side of the first sealing ring 3, and this side is the reverse side of the rotation direction of the core body 2.

[0041] To ensure the sealing effect, the lengths of the first sealing ring 3 and the second sealing ring 4 along the axial direction of the core body 2 are the same as the axial length of the core body 2.

[0042] In addition, in actual implementation, one of the first sealing rings 3 and at least one of the second sealing rings 4 adjacent to it can be integrally formed and in the shape of a Chinese character 'Ri'.

[0043] It should be noted that in actual implementation, grooves will be formed on the outer peripheral wall of the core body 2. Both the first sealing ring 3 and the second sealing ring 4 are clamped in the grooves, and a part of the first sealing ring 3 and the second sealing ring 4 protrudes from the grooves and closely adheres to the inner wall of the valve body 1 to achieve sealing.

[0044] Embodiment Three:

[0045] On the basis of Embodiment One, if the core body 2 can rotate in both the clockwise and counterclockwise directions, compared with Embodiment Two, as Figure 1 shown, in combination with Figure 4 and Figure 7 , at least two second sealing rings 4 are respectively arranged adjacent to both sides of one of the first sealing rings 3 along the axial direction of the core body 2.

[0046] In actual implementation, the first sealing ring 3 is integrally formed with the second sealing rings 4 on both of its sides.

[0047] Embodiment Four:

[0048] In the field of agricultural irrigation, a five-way valve is usually adopted. Therefore, four water outlets 11 are arranged around the axial direction of the core body 2 on the outer wall of the valve body 1. The axials of the four water outlets 11 are in a cross shape of perpendicular intersection.

[0049] Windows 201 are spaced apart on the outer peripheral wall of the core body 2; the first sealing ring 3 is arranged at the position of the window 201; at least one second sealing ring 4 is arranged between two adjacent windows 201 and is adjacent to at least one of the first sealing rings 3.

[0050] Embodiment Five:

[0051] Based on Embodiment 4, as Figure 1 shown, in combination with Fig. 9 , it is assumed that the radial cross-section of the core body 2 has an inscribed regular octagon, and the window 201 is located on one side of the regular octagon. Therefore, the width of the window 201 is one-eighth of the perimeter of the inscribed regular octagon of the radial cross-sectional shape of the core body 2.

[0052] Embodiment 6:

[0053] Compared with Embodiment 4, in some cases, as Figure 1 shown, in combination with Fig.10 , the four water outlets 11 are symmetrically arranged in pairs, and the included angle between the axes of two adjacent water outlets 11 is less than 90 degrees or greater than 90 degrees and less than 180 degrees, that is, the axes of the four water outlets 11 are in an X-shaped intersection.

[0054] Working principle:

[0055] When field rotation irrigation is carried out in farmland irrigation, the valve often has four working states, namely Working State 1: the water outlet of the valve is fully open; Working State 2: the valve is not fully open between 0 - 100% opening; Working State 3: the valve is fully closed; Working State 4: the core body 2 rotates dynamically.

[0056] When the valve is in Working State 1, the core body 2 rotates until the window 201 completely coincides with the water outlet 11. When water flows from the core body 2 through the water outlet 11 to the field pipeline, the first sealing ring 3 that frames the window 201 can effectively prevent water from seeping into the gap cavity between the core body 2 and the valve body 1 and leaking through other water outlets 11.

[0057] When the valve is in Working State 2, the core body 2 rotates in a fixed direction until the window 201 partially coincides with the water outlet 11. Water flows through the non-fully open water outlet 11 to the field pipeline. The second sealing ring 4 on the side of the window 201 can effectively prevent part of the water from entering or flowing back into the gap cavity between the core body 2 and the valve body 1 and leaking through other water outlets 11. In actual implementation, the first sealing ring 3 and the second sealing ring 4 are integrated into an "8" - shaped sealing ring.

[0058] When the valve is in Working State 2, if the core body 2 cannot be set to rotate in a fixed direction, the "8" - shaped sealing ring can be adjusted to a "mesh" - shaped sealing ring, that is, two second sealing rings 4 clamp the first sealing ring 3 in the middle and are integrated, which can ensure that no matter which direction the core body 2 rotates to a certain opening degree of the water outlet 11, it can effectively prevent part of the water from entering or flowing back into the gap cavity between the core body 2 and the valve body 1 and leaking through other water outlets 11.

[0059] When the valve is in working state 3 , the core body 2 rotates until the window 201 and the water outlet 11 do not overlap at all. The first sealing ring 3 framing the window 201 can effectively prevent water from penetrating into the gap cavity between the core body 2 and the valve body 1 and leaking through the water outlet 11 .

[0060] When the valve is in working state 4, during the continuous rotation of the core body 2 in any direction, no matter what positional relationship the window 201 and the water outlet 11 present, as long as a mesh-shaped sealing ring is used, it can effectively prevent water from seeping into the gap cavity between the core body 2 and the valve body 1 and leaking through the water outlet 11.

[0061] To sum up, no matter what working state the valve is in, the sealing structure provided by the utility model achieves a good sealing effect through only one Japanese-shaped or English-shaped sealing ring. The number of sealing rings is small, which reduces the friction between the core body 2 and the valve body 1; there are few accessories, simple assembly, and reduced costs.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing structure of a multi-channel valve core for agricultural irrigation, characterized in that: Comprising: A valve body (1) with a hollow interior; A core body (2) disposed within the valve body (1) and axially rotatable relative to the valve body (1); At least one first sealing ring (3) disposed on the outer peripheral wall of the core body (2) and filling the space between the outer peripheral wall of the core body (2) and the inner wall of the valve body (1); At least one second sealing ring (4) disposed on the portion of the outer peripheral wall of the core body (2) other than the window (201) and filling the space between the outer peripheral wall of the core body (2) and the inner wall of the valve body (1); Wherein, at least one water outlet (11) is axially formed on the outer wall of the valve body (1) around the core body (2); The core body (2) extends axially into a cylindrical or conical cylindrical shape. A window (201) is axially formed on the outer wall of the core body (2). The window (201) is square. The core body (2) rotates axially relative to the valve body (1) and can connect the window (201) to at least one water outlet (11), enabling the water transported into the core body (2) to be discharged out of the valve body (1) through the window (201) and the water outlet (11) in sequence; At least one of the first sealing rings (3) is disposed around the window (201) and frames the window (201); At least one of the second sealing rings (4) is disposed adjacent to at least one side of one of the first sealing rings (3) along the axis of the core body (2). The second sealing ring (4) is disposed on the portion between two windows (201). The second sealing ring (4) is used to restrict water from entering the space between the outer peripheral wall of the core body (2) and the inner wall of the valve body (1) when the core body (2) rotates axially; The first sealing ring (3) and the second sealing ring (4) have the same shape and size. One of the first sealing rings (3) and at least one of the second sealing rings (4) adjacent to it are integrally formed and呈日字型 (in the shape of a Chinese character 'Ri').

2. The sealing structure of a multi-channel valve core for agricultural irrigation according to claim 1, characterized in that: At least two of the second sealing rings (4) are respectively disposed adjacent to both sides of one of the first sealing rings (3) along the axis of the core body (2).

3. The sealing structure of a multi-channel valve core for agricultural irrigation according to claim 1, characterized in that: The axial lengths of the first sealing ring (3) and the second sealing ring (4) along the axis of the core body (2) are the same as the axial length of the core body (2).

4. The sealing structure of a multi-channel valve core for agricultural irrigation according to claim 1, characterized in that: An inlet (12) is provided on one end face of the valve body (1) along the axis of the core body (2). The inlet (12) is in communication with the interior of the valve body (1); A through hole (202) is formed on the end face of the core body (2) facing the inlet (12). The through hole (202) is in communication with the inlet (12). A channel (203) is formed inside the core body (2). Both ends of the channel (203) are respectively in communication with the through hole (202) and the window (201).

5. The sealing structure of a multi-channel valve core for agricultural irrigation according to claim 4, characterized in that: There are four water outlets (11). The four water outlets (11) are axially arranged on the outer wall of the valve body (1) around the core body (2) and are simultaneously in communication with the interior of the valve body (1).

6. The sealing structure of a multi-channel valve core for agricultural irrigation according to claim 5, characterized in that: The four water outlets (11) are evenly axially arranged on the outer wall of the valve body (1) around the core body (2).

7. The sealing structure of a multi-channel valve core for agricultural irrigation according to claim 5, characterized in that: The four water outlets (11) are symmetrically arranged in pairs. The included angle between the axes of adjacent two water outlets (11) is less than ninety degrees or greater than ninety degrees and less than one hundred and eighty degrees.

8. The sealing structure of a multi-channel valve core for agricultural irrigation according to claim 1, characterized in that: The width of the window (201) is one eighth of the perimeter of the regular octagon inscribed in the radial cross-sectional shape of the core (2).

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