Valve

Abstract

The invention relates to the technical field of fluid control, in particular to a valve. The valve element is arranged in the body in a sliding mode in the first direction, the first valve seat is fixed in the body, the second valve seats are sequentially stacked on the first valve seat in the first direction, the second valve seats are arranged in the body in a sliding mode in the second direction, the valve element is in an inverted cone shape, and the first valve seat and the second valve seats are each provided with a through hole. The hole diameter of the through hole in the direction from the second valve seat close to the valve element to the first valve seat is gradually increased, so that the diameter of a sealing line formed when the valve element abuts against the hole wall of the through hole is gradually increased. When the valve element and the first second valve seat are abraded to generate inner leakage, the second valve seat is moved in the second direction, the valve element abuts against the second second valve seat, the diameter of the through hole of the second second valve seat is increased, the diameter of the sealing line is increased accordingly, equivalently, the valve seat and the valve element are replaced, efficiency is improved, and repeated use of the valve is achieved. And maintenance work is avoided, and the body health of workers is prevented from being injured.

Description

Technical Field

[0001] This invention relates to the field of fluid control technology, and more particularly to a valve. Background Technology

[0002] In engineering sites, on-off valves are frequently used for discharging and shutting off fluid media. Due to repeated opening and closing actions, the valve core and seat may collide repeatedly, or foreign objects may cause poor sealing between them, resulting in internal leakage. The conventional approach in this case is to disassemble the valve and grind the sealing surfaces of the valve seat and core to ensure tight contact and a proper seal, but this method is inefficient.

[0003] However, in actual use, for special media or special environments, such as radioactive media or power operation in nuclear power plants, if valves are to be ground, maintenance personnel need to come into contact with radioactive media, enter the nuclear island with power, or the unit needs to be shut down before maintenance can be carried out, which has a serious impact on the health of maintenance personnel and the efficiency of the unit.

[0004] Therefore, there is an urgent need for a valve to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a valve that can improve the efficiency of replacing valve seats and valve cores while ensuring the health of workers.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A valve includes: a body, a valve core, a first valve seat, and a plurality of second valve seats. The valve core is slidably disposed within the body along a first direction. The first valve seat is fixed within the body. The plurality of second valve seats are stacked sequentially on the first valve seat along the first direction, and the second valve seats are slidably disposed within the body along a second direction. The valve core is inverted conical in shape. The first valve seat and the plurality of second valve seats are each provided with a through hole. The diameter of the through hole gradually increases along the direction from the second valve seat near the valve core toward the first valve seat, so that the diameter of the sealing line formed by the valve core abutting against the hole wall of the through hole gradually increases. The first direction is perpendicular to the second direction.

[0008] As a preferred embodiment of the valve described above, the second valve seat includes two semi-rings, which abut against each other to form the through hole.

[0009] As a preferred technical solution of the above-mentioned valve, the second valve seat includes two drive components, which are arranged one-to-one with the two semi-rings. Each drive component includes a motor and a screw. The motor is disposed in the body and is drivenly connected to one end of the screw. The motor can drive the screw to rotate, and the other end of the screw is threadedly connected to the semi-ring.

[0010] As a preferred technical solution of the above-mentioned valve, the second valve seat includes two limiting components, which are respectively arranged in correspondence with the two driving components. Each limiting component includes a first limiting member and a second limiting member. The first limiting member is fixed in the body, and the second limiting member is fixed in the semi-ring. The second limiting member can abut against the first limiting member.

[0011] As a preferred embodiment of the valve described above, the valve further includes an electromagnetic coil, with the valve core passing through the electromagnetic coil, and the electromagnetic coil capable of driving the valve core to move along the first direction.

[0012] As a preferred embodiment of the valve described above, the valve further includes an elastic element configured to always have a tendency to drive the valve core to abut against the wall of the through hole.

[0013] As a preferred technical solution for the aforementioned valve, the elastic element is a compression spring.

[0014] As a preferred technical solution of the above-mentioned valve, the valve core includes an iron core and a sealing head. The iron core is connected to the sealing head, and the sealing head is inverted conical shape. The sealing head abuts against the wall of the through hole to form the sealing line. The iron core passes through the electromagnetic coil, and the elastic element is disposed between the body and the iron core.

[0015] As a preferred embodiment of the valve described above, the valve core further includes a connecting block, which is connected between the iron core and the sealing head, and the connecting block is slidably connected to the inner wall of the body.

[0016] As a preferred embodiment of the aforementioned valve, the valve is provided with two second valve seats.

[0017] Beneficial effects of this invention:

[0018] This invention provides a valve. The valve includes: a body, a valve core, a first valve seat, and a plurality of second valve seats. The valve core is slidably disposed within the body along a first direction, the first valve seat is fixed within the body, and the plurality of second valve seats are stacked sequentially on the first valve seat along the first direction, and the second valve seats are slidably disposed within the body along a second direction. The valve core is inverted conical in shape. The first valve seat and the plurality of second valve seats are all provided with through holes, and the diameter of the through holes gradually increases along the direction from the second valve seat near the valve core toward the first valve seat, so that the diameter of the sealing line formed by the valve core abutting against the hole wall of the through hole gradually increases. The first direction is perpendicular to the second direction. Compared to existing technologies, this valve features several second valve seats and a first valve seat. The valve core is designed with an inverted conical shape, and the conical surface of the valve core abuts against the wall of the through hole to form a sealing line. When the valve core wears against the first second valve seat, causing internal leakage, the second valve seat is moved in a second direction, causing the valve core to abut against the second second valve seat. Since the through hole diameter of the second second valve seat is larger than that of the first second valve seat, the diameter of the sealing line also increases accordingly. This is equivalent to replacing the valve seat and valve core, improving replacement efficiency. At the same time, it enables the valve to be reused, avoiding maintenance work, preventing harm to the health of workers, and improving efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0020] Figure 1 This is a first structural schematic diagram of the valve provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the second structure of the valve provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the second valve seat provided in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the first structure of the valve core provided in an embodiment of the present invention;

[0024] Figure 5 This is a structural schematic diagram of the valve in the open state provided in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the second valve seat in use according to an embodiment of the present invention;

[0026] Figure 7This is a schematic diagram of the structure of the valve using the first valve seat provided in an embodiment of the present invention.

[0027] In the picture:

[0028] 1. Body; 2. Valve core; 21. Iron core; 22. Sealing head; 23. Connecting block; 3. First valve seat; 4. Second valve seat; 41. Screw hole; 5. Through hole; 6. Sealing line; 7. Half ring; 8. Motor; 9. Screw; 10. First limiting element; 11. Second limiting element; 12. Electromagnetic coil; 13. Elastic element; 14. Power supply control box; 15. Power supply cable; 16. Control cable; 17. Inlet; 18. Outlet. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0030] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0033] like Figures 1 to 7 As shown, the present invention provides a valve. The valve includes: a body 1, a valve core 2, a first valve seat 3, and a plurality of second valve seats 4.

[0034] Specifically, the valve core 2 is slidably disposed on the body 1 along the first direction, the first valve seat 3 is fixed inside the body 1, and several second valve seats 4 are stacked sequentially on the first valve seat 3 along the first direction, and the second valve seats 4 are slidably disposed inside the body 1 along the second direction. The valve core 2 is inverted conical in shape, and the first valve seat 3 and several second valve seats 4 are provided with through holes 5. The diameter of the through holes 5 gradually increases along the direction from the second valve seat 4 near the valve core 2 to the first valve seat 3, so that the diameter of the sealing line 6 formed by the valve core 2 abutting against the hole wall of the through hole 5 gradually increases. The first direction is perpendicular to the second direction. Compared to existing technologies, this valve features several second valve seats 4 and a first valve seat 3. The valve core 2 is designed as an inverted cone shape, with the cone-shaped surface of the valve core 2 abutting against the wall of the through hole 5 to form a sealing line 6. When the valve core 2 wears against the first second valve seat 4, causing internal leakage, the second valve seat 4 is moved along a second direction, causing the valve core 2 to abut against the second second valve seat 4. Since the diameter of the through hole 5 of the second second valve seat 4 is larger than that of the first second valve seat 4, the diameter of the sealing line 6 also increases accordingly. Sealing is achieved through different sealing lines 6, which is equivalent to replacing the valve seat and valve core 2, improving replacement efficiency. At the same time, the valve can be reused, avoiding maintenance work, preventing harm to the health of workers, and improving efficiency.

[0035] Optionally, the second valve seat 4 includes two semi-rings 7, which abut against each other to form a through hole 5. Specifically, the second valve seat 4 is annular and vertically stacked. The inner diameters of the second valve seats 4 are different, increasing sequentially downwards, and each is formed by splicing two semi-rings 7. The valve core 2 is frustum-shaped, so that different sealing lines 6 are in different positions. This is equivalent to replacing the entire set of valve seats and valve core 2, eliminating the grinding process and preventing harm to personnel health.

[0036] Optionally, the second valve seat 4 includes two drive assemblies, each corresponding to one of the two semi-rings 7. Each drive assembly includes a motor 8 and a screw 9. The motor 8 is housed within the body 1 and is connected to one end of the screw 9, enabling the motor 8 to drive the screw 9 to rotate. The other end of the screw 9 is threadedly connected to the semi-ring 7. Specifically, motors 8 are located on both the left and right sides of the second valve seat 4. The front end of each motor 8 is connected to the screw 9, with a portion of the screw 9 inserted into the screw hole 41 of the second valve seat 4. When internal leakage occurs in the valve, the motors 8 on both sides are activated, causing the screw 9 to rotate. Since the motors 8 and screw 9 are stationary, and the second valve seat 4 cannot rotate due to the valve body's constraints, the two semi-rings 7 are pulled out to the sides by the screw 9, thus exposing the next layer of the second valve seat 4 with a larger diameter, enabling valve seat replacement.

[0037] Optionally, the second valve seat 4 includes two limiting components, which are configured one-to-one with the two drive components. The limiting components include a first limiting member 10 and a second limiting member 11. The first limiting member 10 is fixed inside the body 1, and the second limiting member 11 is fixed to the semi-ring 7. The second limiting member 11 can abut against the first limiting member 10. Specifically, the valve also includes a power supply control box 14. The first limiting member 10 is a limiting stationary magnetic head, which is connected to the power supply control box 14 via a cable. The second limiting member 11 is a limiting moving magnetic head, which is rigidly connected to the semi-ring 7 and moves with it to trigger the limiting stationary magnetic head signal. The power supply control box 14 is connected to the motor 8, which receives start and stop signals to control the movement of the semi-ring 7.

[0038] Optionally, in this embodiment, the valve further includes an electromagnetic coil 12, with the valve core 2 passing through the electromagnetic coil 12. The electromagnetic coil 12 can drive the valve core 2 to move along a first direction. The valve also includes an elastic element 13, which is configured to always have a tendency to drive the valve core 2 to abut against the wall of the through hole 5. The valve core 2 includes an iron core 21 and a sealing head 22. The iron core 21 is connected to the sealing head 22, which is inverted conical in shape. The sealing head 22 abuts against the wall of the through hole 5 to form a sealing line 6. The iron core 21 passes through the electromagnetic coil 12, and the elastic element 13 is disposed between the body 1 and the iron core 21. Specifically, the valve is a solenoid valve, and the valve core 2 moves vertically up and down. When the solenoid valve is energized, the electromagnetic coil 12 generates a magnetic field, which attracts the iron core 21 and compresses the elastic element 13, opening the valve and allowing the medium to flow from the inlet 17 to the outlet 18. When the solenoid valve is de-energized, due to gravity and elasticity, the valve core 2 presses down onto the second valve seat 4, closing the valve and cutting off the medium flow. Of course, in some other embodiments, the valve may also be other types of valves, such as pneumatic valves, electric valves, etc.

[0039] Furthermore, the elastic element 13 is a compression spring. Specifically, the compression spring is used to provide pressure to the valve core 2 when the valve is closed to achieve a sealing effect. However, due to the replacement of valve seats, the compression spring's extension and contraction will increase, and the pressure on the valve core 2 will decrease. Therefore, when the second valve seat 4 is used initially, the compression spring can provide a large elasticity margin.

[0040] Optionally, the valve core 2 also includes a connecting block 23, which is connected between the iron core 21 and the sealing head 22. The connecting block 23 is slidably connected to the inner wall of the body 1, which can prevent the valve core 2 from tilting.

[0041] Optionally, the power supply control box 14 supplies power to the solenoid valve coil via power supply cable 15 and to the motor 8 via control cable 16, while also transmitting limit switch signals. Specifically, the power supply control box 14 can switch the solenoid valve coil on and off, and control the start and stop of the motor 8 inside the valve body. The panel of the power supply control box 14 has two displays: the left display shows the valve's on / off status, and the right display shows which second valve seat 4 or first valve seat 3 is currently in use, with corresponding buttons. This allows the power supply control box 14 to remotely operate the valve, avoiding personnel access to areas with radiation doses, corrosion, or other unsuitable conditions. Furthermore, the power supply control box 14 can also be designed with an electrode reversal function, which can further tighten the valve core 2 to enhance the sealing effect when internal leakage is suspected.

[0042] Optionally, the power supply control box 14 uses a controller for control. In this embodiment, the controller can be a centralized or distributed controller. For example, the controller can be a single microcontroller or a combination of multiple distributed microcontrollers. The microcontroller can run a control program to control each component to achieve its function.

[0043] Optionally, the valve is provided with two second valve seats 4, namely an upper second valve seat 4 and a lower second valve seat 4. The operation of this valve is as follows:

[0044] 1. For example Figure 5 As shown, the valve is open. When the valve is energized, the valve coil is charged, drawing the upper iron core 21 of the valve core 2 into the electromagnetic coil 12, compressing the elastic element 13, connecting the valve inlet 17 and outlet 18, and the valve is opened.

[0045] 2. For example Figure 6As shown, the lower second valve seat 4 is in use. When remote personnel determine that the valve has internal leakage based on parameters such as flow rate and pressure of the process system, they can operate it through the buttons on the power supply control box 14; press the "open" button on the power supply control box 14 to first put the valve in the open state; press the "two" button on the power supply control box 14 to transmit the start signal to the two motors 8 of the upper second valve seat 4; when the motors 8 receive the signal, the motors 8 start, the screw 9 rotates through the threaded hole, and pulls the upper second valve seat 4 out to both sides; when the second limit member 11 installed on the upper second valve seat 4 approaches the first limit member 10, the first limit member 10 is triggered, and the signal is transmitted to the power supply control box 14; after receiving the switch signal of the first limit member 10, the power supply control box 14 sends a stop signal to the two motors 8 of the upper second valve seat 4, and the two motors 8 stop. At this time, the upper second valve seat 4 has been retracted into the body 1, and the lower second valve seat 4 is exposed. Press the "close" button on the power supply control box 14, the valve core 2 closes downward and is pressed by the elastic member 13. At this time, the sealing line 6 between the valve core 2 and the lower second valve seat 4 shifts upwards towards the valve core 2 because the inner diameter of the lower second valve seat 4 is larger than that of the upper second valve seat 4. This is equivalent to the valve seat and valve core 2 being replaced, achieving the purpose of remote replacement.

[0046] 3. For example Figure 7 As shown, the first valve seat 3 is in use. The first valve seat 3 can only be used when both the upper second valve seat 4 and the lower second valve seat 4 have internal leakage. When remote personnel determine that the valve is leaking internally based on parameters such as flow rate and pressure of the process system, they can operate it via the buttons on the power supply control box 14. Pressing the "Open" button on the power supply control box 14 first puts the valve in the open state. Pressing the "Three" button on the power supply control box 14 transmits the start signal to the two motors 8 of the lower second valve seat 4. When the motors 8 receive the signal, they start, and the screw 9 rotates through the threaded hole, pulling the lower second valve seat 4 out to both sides. When the second limit member 11 installed on the lower second valve seat 4 approaches the first limit member 10, the second limit member 11 is triggered, and the signal is transmitted to the power supply control box 14. After receiving the switch signal from the first limit member 10, the power supply control box 14 sends a stop signal to the two motors 8 of the lower second valve seat 4, and the two motors 8 stop. At this time, the lower second valve seat 4 has been retracted into the body 1, and the first valve seat 3 is exposed. Pressing the "Close" button on the power supply control box 14 closes the valve core 2 downwards, and it is pressed by the elastic member 13. At this time, the sealing line 6 between the valve core 2 and the first valve seat 3 shifts upwards because the inner diameter of the first valve seat 3 is larger than the inner diameter of the second valve seat 4. This is equivalent to the valve seat and valve core 2 being replaced, achieving the purpose of remote replacement.

[0047] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A valve, characterized in that, include: The body (1), valve core (2), first valve seat (3) and several second valve seats (4) are provided. The valve core (2) is slidably disposed in the body (1) along a first direction. The first valve seat (3) is fixed in the body (1). Several second valve seats (4) are stacked sequentially on the first valve seat (3) along the first direction. The second valve seats (4) are slidably disposed in the body (1) along a second direction. The valve core (2) is inverted conical. The first valve seat (3) and several second valve seats (4) are provided with through holes (5). The diameter of the through holes (5) gradually increases along the direction from the second valve seat (4) near the valve core (2) towards the first valve seat (3) so that the diameter of the sealing line (6) formed by the valve core (2) abutting against the hole wall of the through hole (5) gradually increases. The first direction is perpendicular to the second direction.

2. The valve according to claim 1, characterized in that, The second valve seat (4) includes two semi-rings (7), which abut against each other to form the through hole (5).

3. A valve according to claim 2, characterized in that, The second valve seat (4) includes two drive components, which are arranged one-to-one with the two semi-rings (7). Each drive component includes a motor (8) and a screw (9). The motor (8) is located inside the body (1) and is connected to one end of the screw (9). The motor (8) can drive the screw (9) to rotate. The other end of the screw (9) is threadedly connected to the semi-ring (7).

4. A valve according to claim 3, characterized in that, The second valve seat (4) includes two limiting components, which are respectively configured to correspond to the two driving components. The limiting components include a first limiting member (10) and a second limiting member (11). The first limiting member (10) is fixed inside the body (1), and the second limiting member (11) is fixed to the semi-ring (7). The second limiting member (11) can abut against the first limiting member (10).

5. A valve according to claim 1, characterized in that, The valve also includes an electromagnetic coil (12), and the valve core (2) passes through the electromagnetic coil (12). The electromagnetic coil (12) can drive the valve core (2) to move along the first direction.

6. A valve according to claim 5, characterized in that, The valve also includes an elastic element (13) configured to always have a tendency to drive the valve core (2) against the wall of the through hole (5).

7. A valve according to claim 6, characterized in that, The elastic element (13) is a compression spring.

8. A valve according to claim 6, characterized in that, The valve core (2) includes an iron core (21) and a sealing head (22). The iron core (21) is connected to the sealing head (22). The sealing head (22) is inverted conical. The sealing head (22) abuts against the wall of the through hole (5) to form the sealing line (6). The iron core (21) passes through the electromagnetic coil (12). The elastic element (13) is disposed between the body (1) and the iron core (21).

9. A valve according to claim 8, characterized in that, The valve core (2) also includes a connecting block (23), which is connected between the iron core (21) and the sealing head (22), and the connecting block (23) is slidably connected to the inner wall of the body (1).

10. A valve according to any one of claims 1-9, characterized in that, The valve is provided with two second valve seats (4).

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