A damping control solenoid valve

Abstract

This utility model discloses a damping control solenoid valve, which includes a pressure relief channel located between the valve core end face in the pilot zone and the electromagnet zone. By adjusting the size of the pressure relief channel, the damping control solenoid valve can retain damping force in failure mode and the magnitude of the damping force can be adjusted. Replacing the fitting clearance with a pressure relief channel, the pressure relief channel can be constructed as any suitable structure such as a groove or hole, and its quantity, formation, and size parameters can also be adjusted according to the actual operating environment and requirements, resulting in better controllability of the total fluid flow area. While retaining the damping adjustment function of the solenoid valve, different de-energized hydraulic characteristics are achieved, and corresponding de-energized hydraulic characteristic curves are obtained.

Description

Technical Field

[0001] This utility model relates to the field of damping control solenoid valve technology, specifically to a damping control solenoid valve. Background Technology

[0002] Solenoid valves are electromagnetically controlled industrial devices. They are basic components of automation used to control fluids and are used in industrial control systems to adjust the direction, flow rate, speed, and other parameters of the medium.

[0003] Existing solenoid valves have a fail-safe function. When the solenoid valve is de-energized, the pilot valve core, under the force of the pilot spring, moves axially to the stop element, cutting off the first outlet oil port. At this time, the oil in the pilot zone is discharged through the clearance between the pilot valve core and the valve sleeve. Furthermore, different de-energized hydraulic characteristics can be achieved by controlling the size of the clearance.

[0004] The problems with the existing technology are: the size of the fit clearance is difficult to control, and it is difficult to flexibly change the power-off hydraulic characteristic curve according to the customer's input requirements; at the same time, the performance of the power-off hydraulic characteristic curve has large dispersion and is difficult to control in terms of consistency. Utility Model Content

[0005] The technical problem to be solved by this utility model is the difficulty in changing the hydraulic characteristic curve after power failure. The purpose is to provide a damping control solenoid valve, based on structural improvements, so that the damping force can be adjusted in the solenoid valve failure mode, while reducing the difficulty of obtaining the relevant characteristic curve.

[0006] This utility model is achieved through the following technical solution:

[0007] A damping control solenoid valve includes a pressure relief channel located between the valve core end face in the pilot zone and the electromagnet zone. By adjusting the size of the pressure relief channel, the damping control solenoid valve can retain damping force in failure mode and can adjust the magnitude of the damping force.

[0008] In one possible design, the valve core is provided with a first liquid passage, a second liquid passage, and a first sealing surface;

[0009] The first liquid channel is provided at least one and spaced apart;

[0010] The second liquid channel is provided at least one and spaced apart;

[0011] The first sealing surface is provided on the valve core, and the valve core is divided into an outer ring area located on the outer periphery of the first sealing surface and an inner ring area located on the inner periphery of the first sealing surface. The first liquid channel is located in the outer ring area, and the second liquid channel is located between the valve core and the electromagnet area.

[0012] When the valve core slides back and forth, the first sealing surface abuts against or disengages from the second sealing surface to control the opening and closing of the first liquid passage; correspondingly, the second liquid passage is always open.

[0013] Accordingly, at least one first liquid channel is configured as an overflow channel, and at least one second liquid channel is configured as the pressure relief channel.

[0014] In one possible design, the second liquid passage has multiple sizes to adjust the hydraulic pressure regulation capability of the pressure relief passage, as well as the damping force of the damping control solenoid valve in failure mode.

[0015] In one possible design, there are 6-10 first liquid channels evenly distributed in the outer ring area; and at least two second liquid channels are provided between the valve core and the electromagnet area.

[0016] In one possible design, the first liquid channel is constructed as eight overflow holes evenly distributed on the same circumference of the outer ring area, and the second liquid channel is constructed as at least two pressure relief grooves arranged opposite each other.

[0017] In one possible design, it also includes a valve body, a valve sleeve, and a support block;

[0018] The valve body has a cavity, the valve sleeve is placed in the cavity and divides the cavity into two sub-cavities, and the valve sleeve has a first channel for connecting the two sub-cavities.

[0019] The support block is located at the end of the valve body, and the middle of the support block is provided with a second channel for connecting one of the sub-cavities to the outside.

[0020] A control area is formed between the valve sleeve and the support block for the valve core to slide back and forth. Accordingly, when the valve core slides back and forth in the control area, both the first liquid channel and the second liquid channel are used to connect the first channel and the second channel. When the valve core abuts against the support block, the first liquid channel is blocked by the support block, and the second liquid channel is always open and used to connect the first channel and the second channel.

[0021] Accordingly, the outer surface of the support block facing the sub-cavity is configured as the second sealing surface.

[0022] In one possible design, a drive shaft and a return spring are also included; the drive shaft is constructed as a magnetic core shaft that passes through the support block and connects to the valve core; the return spring is sleeved on the valve core and located between the valve core and the valve sleeve.

[0023] In one possible design, the valve body is fitted with a valve housing, and a drainage channel connecting the valve body and the valve housing to the outside is provided between the valve body and the valve housing; correspondingly, the drive shaft is connected to the valve housing via a bearing.

[0024] The valve body is provided with a limiting block and a valve plate. The limiting block has two opposing outer surfaces, one of which is connected to the valve plate and the other is set opposite to the support block. Correspondingly, the gap between the limiting block and the support block is constructed as part of the drainage channel.

[0025] In one possible design, the valve housing has an additional seat located on the valve plate, and the additional seat has a bearing for connecting the drive shaft and the valve housing.

[0026] In one possible design, it also includes a main valve zone, a pilot zone, and an electromagnet zone connected in sequence, a pressure relief channel between the pilot zone and the electromagnet zone, and the opening degree of the pilot zone valve core, which together regulate the hydraulic pressure in the main valve zone; the electromagnet zone is used to control the operation of the valve core.

[0027] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0028] By replacing the clearance with a pressure relief channel, the pressure relief channel can be constructed as any suitable structure such as a groove or hole, and the parameters such as the number, formation, and size can also be adjusted according to the actual use environment and requirements, so that the total liquid flow area is more controllable. While retaining the damping adjustment function for the solenoid valve, different power-off hydraulic characteristics can be achieved and the corresponding power-off hydraulic characteristic curves can be obtained.

[0029] In addition, compared to the clearance, the pressure relief channel has better controllability, which helps to improve the performance consistency of the hydraulic characteristic curve after power failure, reduce the impact of factors such as impurity jamming and liquid shock instability, and has a lower failure risk. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0031] Figure 1 This is a schematic diagram of a damping control solenoid valve.

[0032] Figure 2 for Figure 1 A schematic diagram of a partial structure of the pilot zone, with red lines representing the liquid flow path.

[0033] Figure 3 This is a schematic diagram of the valve core.

[0034] Figure 4 for Figure 3 Cross-sectional structural diagram.

[0035] Figure 5 This is a schematic diagram of the structure when the valve core presses against the support block. The red lines in the diagram represent the liquid flow path.

[0036] The attached diagram shows the markings and corresponding component names:

[0037] 1. Valve core; 101. First liquid passage; 102. Second liquid passage; 103. First sealing surface; 104. Outer ring area; 105. Inner ring area; 2. Valve body; 3. Valve sleeve; 301. First channel; 4. Support block; 401. Second channel; 5. Drive shaft; 6. Return spring; 7. Valve housing; 8. Drainage channel; 9. Bearing; 10. Limiting block; 11. Valve plate; 12. Additional seat; 100. Main valve area; 200. Pilot area; 300. Electromagnet area. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0039] Example:

[0040] like Figures 1-5 As shown, a damping control solenoid valve includes a pressure relief channel located between the valve core 1 end face in the pilot region 200 and the electromagnet region 300. By adjusting the size of the pressure relief channel, the damping control solenoid valve can maintain damping force in failure mode and can adjust the magnitude of the damping force.

[0041] In the damping control solenoid valve, the valve core 1 is provided with an overflow channel and a pressure relief channel. Both the overflow channel and the pressure relief channel are channels for liquid to pass through, and the pressure relief channel is kept open. That is, the damping control solenoid valve has two states when it is working: one is the normal working mode in which both the overflow channel and the pressure relief channel are kept open, and the other is the failure mode in which only the pressure relief channel is kept open.

[0042] Based on this, the damping control solenoid valve includes a main valve section 100, a pilot section 200, and an electromagnet section 300 connected in sequence. When the solenoid valve is working normally, both the overflow channel and the pressure relief channel remain open. The liquid inside the valve mainly flows through the valve core 1 via the overflow channel, thereby regulating the flow and pressure in the pilot section 200 and achieving the overflow control function of the pilot section 200. Ultimately, this controls the opening degree of the main valve section 100 of the solenoid valve. Conversely, when the solenoid valve fails due to power failure, the valve core 1 is blocked by hydraulic pressure against the stop element, causing the overflow channel to be blocked. However, the pressure relief channel remains open, providing adjustable liquid to the solenoid valve, thus maintaining a certain damping adjustment function.

[0043] Therefore, compared with the existing technology, by replacing the fitting clearance with a pressure relief channel, the pressure relief channel can be constructed as any suitable structure such as a groove or hole, and the parameters of its quantity, formation, and size can also be adjusted according to the actual use environment and requirements, so that the total liquid flow area is more controllable. While retaining the damping adjustment function for the solenoid valve, different power-off hydraulic characteristics can be achieved and the corresponding power-off hydraulic characteristic curves can be obtained.

[0044] In addition, compared to the clearance, the pressure relief channel has better controllability, which helps to improve the performance consistency of the hydraulic characteristic curve after power failure, reduce the impact of factors such as impurity jamming and liquid shock instability, and has a lower failure risk.

[0045] In one possible implementation, the valve core 1 is provided with a first liquid passage 101, a second liquid passage 102 and a first sealing surface 103;

[0046] The first liquid channel 101 is provided with at least one and spaced apart;

[0047] The second liquid channel 102 is provided with at least one and spaced apart;

[0048] The first sealing surface 103 is disposed on the valve core 1, and divides the valve core 1 into an outer ring area 104 located on the outer periphery of the first sealing surface 103 and an inner ring area 105 located on the inner periphery of the first sealing surface 103. The first liquid channel 101 is located in the outer ring area 104, and the second liquid channel 102 is located between the valve core 1 and the electromagnet area 300.

[0049] When the valve core 1 slides back and forth, the first sealing surface 103 abuts against or disengages from the second sealing surface to control the opening and closing of the first liquid passage 101; correspondingly, the second liquid passage 102 is normally open.

[0050] Accordingly, at least one first liquid channel 101 is configured as an overflow channel, and at least one second liquid channel 102 is configured as the pressure relief channel.

[0051] Based on the above design, during normal operation, the valve core 1 slides back and forth within the solenoid valve, controlling the flow path of the overflow channel, i.e., the opening and closing of the first liquid channel 101. Conversely, if the solenoid valve fails, the valve core 1 will press against the stop element. Because the first sealing surface 103 is in close contact with the support block 4, and the first sealing surface 103 and the second sealing surface are pressed against each other, the first liquid channel 101 is blocked, but the second liquid channel 102 remains open, allowing liquid to flow out from the second liquid channel 102. That is, in the failure mode, because the pressure relief channel remains open, the damping control solenoid valve maintains a certain damping adjustment function, thereby obtaining a liquid pressure curve.

[0052] Combination Figures 3-5As shown, the first liquid channel 101 is constructed to pass through the valve core 1, allowing liquid to pass through the valve core 1 and flow into the space between the valve core 1 and the support block 4, and then flow out. The second liquid channel 102 is located on the first sealing surface 103. When the first sealing surface 103 is in close contact with the support block 4, the second liquid channel 102 creates a gap in the contact surface between the first sealing surface 103 and the support block 4, allowing liquid to flow out through the second liquid channel 102.

[0053] For valve core 1, the blocking effect is improved and guaranteed by the setting of the first sealing surface 103. When the first sealing surface 103 presses against the second sealing surface, the first liquid channel 101 is blocked. At the same time, valve core 1 is also divided into two zones by the first sealing surface 103, namely the outer ring zone 104 and the inner ring zone 105. The first liquid channel 101 and the second liquid channel 102 can be distributed in the corresponding zones, which provides better flexibility in layout and can adapt to different usage requirements.

[0054] It is noteworthy that the second liquid channel 102 has various sizes to adjust the hydraulic pressure regulation capability of the pressure relief channel, as well as the damping force of the damping control solenoid valve in failure mode. Based on this, different liquid pressure curves can be obtained by adjusting the parameters of the second liquid channel 102.

[0055] Optionally, the first liquid channel 101 has 6-10 channels evenly distributed on the outer ring area 104; the second liquid channel 102 has at least two channels between the valve core 1 and the electromagnet area 300. Based on this, operators can select and combine parameters such as quantity, position, and shape to obtain different implementation schemes, thereby adapting to different usage requirements.

[0056] Specifically, a practical and feasible solution is given here, such as Figure 3 As shown, the first liquid channel 101 is constructed as eight overflow holes evenly distributed on the same circumference of the outer ring region 104, and the second liquid channel 102 is constructed as at least two pressure relief grooves arranged opposite each other.

[0057] In one possible implementation, the damping control solenoid valve further includes a valve body 2, a valve sleeve 3, and a support block 4.

[0058] The valve body 2 has a cavity, the valve sleeve 3 is placed in the cavity and divides the cavity into two sub-cavities, and the valve sleeve 3 has a first channel 301 for connecting the two sub-cavities.

[0059] The support block 4 is located at the end of the valve body 2, and the middle of the support block 4 is provided with a second channel 401 for connecting one of the sub-cavities to the outside.

[0060] A control area is formed between the valve sleeve 3 and the support block 4 for the valve core 1 to slide back and forth. Correspondingly, when the valve core 1 slides back and forth in the control area, the first liquid channel 101 and the second liquid channel 102 are both used to connect the first channel 301 and the second channel 401. When the valve core 1 abuts against the support block 4, the first liquid channel 101 is blocked by the support block 4, and the second liquid channel 102 is normally open and used to connect the first channel 301 and the second channel 401.

[0061] Accordingly, the outer surface of the support block 4 facing the sub-cavity is configured as the second sealing surface.

[0062] Based on the above design, the valve sleeve 3 is used for motion guidance and control of the valve core 1, limiting the movement trajectory of the valve core 1, preventing the valve core 1 from wobbling, and helping to reduce collisions of the valve core 1 during movement. Figure 1 As shown, the valve sleeve 3 is connected to the main valve area 100 of the solenoid valve through the valve body 2. The valve core 1 can be replaced by disassembling the main valve area 100, which makes the replacement of the valve core 1 more convenient and effectively reduces related costs.

[0063] The support block 4 can be constructed into any suitable shape so that the support block 4 has the advantages of simple structure, easy processing, easy size control, and more stable sealing, making the seal between the first sealing surface 103 and the second sealing surface more stable, and also helping to increase the controllability of the pressure relief channel.

[0064] The valve body 2 can be constructed in any suitable shape, and this utility model does not impose any restrictions on it.

[0065] When the solenoid valve is working normally, the high-pressure liquid in the sub-chamber flows into the control area through the first channel 301. By sliding the valve core 1, the position of the valve core 1 relative to the valve sleeve 3 and the support block 4 is adjusted, thereby regulating the flow and pressure in the pilot zone 200. The liquid mainly flows into the second channel 401 through the first liquid channel 101 and then out of the valve body 2. Conversely, when the solenoid valve fails, the valve core 1 is pressed tightly against the support block 4 due to hydraulic pressure, blocking the first liquid channel 101. However, the liquid can still flow into the second channel 401 through the second liquid channel 102 and then out of the valve body 2.

[0066] In one possible implementation, the damping control solenoid valve further includes a drive shaft 5 and a return spring 6; the drive shaft 5 is configured to pass through the support block 4 and connect to the magnetic core shaft of the valve core 1; the return spring 6 is sleeved on the valve core 1 and located between the valve core 1 and the valve sleeve 3.

[0067] Based on the above design, the sliding of valve core 1 is explained as follows: the electromagnet region 300 of the solenoid valve provides electromagnetic force. When the electromagnetic force is greater than the elastic force of the return spring 6, the drive shaft 5 moves towards the valve sleeve 3, and the return spring 6 is compressed and deformed. When the electromagnetic force is less than the elastic force of the return spring 6, the drive shaft 5 moves towards the support block 4, and the return spring 6 returns to its original position and extends. Therefore, the operator can adjust the position of valve core 1 by controlling the electromagnetic force, thereby regulating the flow and pressure in the pilot zone 200.

[0068] If the solenoid valve fails, the electromagnetic force disappears, and the valve core 1 presses against the support block 4 under the drive of the return spring 6. At this time, liquid can flow into the second channel 401 through the second liquid channel 102, and then flow out of the valve body 2.

[0069] It is worth noting that the position of the drive shaft 5 is described based on the support block 4, the position of the return spring 6 is described based on the valve sleeve 3, and the valve core 1 is located between the support block 4 and the valve sleeve 3. That is, the drive shaft 5 and the return spring 6 are located on both sides of the valve core 1, and the reciprocating sliding of the valve core 1 in the control area is achieved through the cooperation of the two.

[0070] Correspondingly, the inner ring region 105 of the valve core 1 is provided with an opening adapted to the drive shaft 5, so that the drive shaft 5 can be inserted into the valve core 1, thereby realizing the connection between the drive shaft 5 and the valve core 1.

[0071] In one possible implementation, the valve body 2 is fitted with a valve housing 7, and a drainage channel 8 connecting the second channel 401 to the outside is left between the valve body 2 and the valve housing 7; correspondingly, the drive shaft 5 is connected to the valve housing 7 through a bearing 9.

[0072] The valve housing 7 is provided with a limiting block 10 and a valve plate 11. The limiting block 10 has two opposing outer surfaces, one of which is connected to the valve plate 11, and the other is disposed opposite to the support block 4. Accordingly, the gap between the limiting block 10 and the support block 4 is constructed as part of the drainage channel 8.

[0073] Based on the above design scheme and combined with the structure of the solenoid valve, the valve housing 7 is located in the electromagnet area 300 of the solenoid valve, and the valve body 2 is located in the main valve area 100 of the solenoid valve. The valve housing 7 provides space for the installation of various components in the electromagnet area 300, and is also used to connect the valve body 2, so that the various components in the solenoid valve are connected into an organic whole.

[0074] The limit block 10 is used to limit the position, ensuring that the valve body 2 is in the designed position, and also helps to form a gap and drain the liquid, that is, to form a drain channel 8, ensuring that the liquid can flow out smoothly.

[0075] In one possible implementation, the valve housing 7 includes an auxiliary seat 12 located on the valve plate 11, and the auxiliary seat 12 contains a bearing 9 for connecting the drive shaft 5 and the valve housing 7. Accordingly, the auxiliary seat 12 can be constructed in any suitable shape to accommodate the selected bearing 9 model.

[0076] In one possible implementation, the damping control solenoid valve further includes a main valve region 100, a pilot region 200, and an electromagnet region 300 connected in sequence. A pressure relief channel between the pilot region 200 and the electromagnet region 300, and the opening degree of the pilot region valve core, jointly regulate the hydraulic pressure in the main valve region 100. The electromagnet region 300 is used to control the operation of the valve core 1. It is readily understood that the main valve region 100 and the electromagnet region 300 can be any suitable existing model, offering a wide range of choices.

[0077] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A damping control solenoid valve, characterized in that, The damping control solenoid valve includes a pressure relief channel between the end face of the valve core (1) located in the pilot zone (200) and the electromagnet zone (300). The size of the pressure relief channel is adjusted so that the damping control solenoid valve retains damping force in failure mode and can adjust the magnitude of the damping force.

2. The damping control solenoid valve according to claim 1, characterized in that, The valve core (1) is provided with a first liquid channel (101), a second liquid channel (102) and a first sealing surface (103). The first liquid channel (101) is provided with at least one and spaced apart; The second liquid channel (102) is provided with at least one and spaced apart; The first sealing surface (103) is disposed on the valve core (1) and divides the valve core (1) into an outer ring area (104) located on the outer periphery of the first sealing surface (103) and an inner ring area (105) located on the inner periphery of the first sealing surface (103). The first liquid channel (101) is located in the outer ring area (104), and the second liquid channel (102) is located between the valve core (1) and the electromagnet area (300). When the valve core (1) slides back and forth, the first sealing surface (103) abuts against or disengages from the second sealing surface to control the opening and closing of the first liquid passage (101); correspondingly, the second liquid passage (102) is always open. Accordingly, at least one first liquid channel (101) is configured as an overflow channel, and at least one second liquid channel (102) is configured as the pressure relief channel.

3. The damping control solenoid valve according to claim 2, characterized in that, The second liquid passage (102) has multiple sizes to adjust the hydraulic pressure regulation capability of the pressure relief passage, as well as the damping force of the damping control solenoid valve in failure mode.

4. The damping control solenoid valve according to claim 2, characterized in that, The first liquid channel (101) has 6-10 channels evenly distributed on the outer ring area (104); the second liquid channel (102) has at least two channels between the valve core (1) and the electromagnet area (300).

5. The damping control solenoid valve according to claim 4, characterized in that, The first liquid channel (101) is constructed as 8 overflow holes evenly distributed on the same circumference of the outer ring area (104), and the second liquid channel (102) is constructed as at least 2 pressure relief grooves arranged opposite each other.

6. The damping control solenoid valve according to claim 2, characterized in that, It also includes a valve body (2), a valve sleeve (3), and a support block (4); The valve body (2) has a cavity inside, and the valve sleeve (3) is set in the cavity and divides the cavity into two sub-cavities. The valve sleeve (3) has a first channel (301) for connecting the two sub-cavities. The support block (4) is located at the end of the valve body (2), and the middle part of the support block (4) is provided with a second channel (401) for connecting one of the sub-cavities to the outside. A control area is formed between the valve sleeve (3) and the support block (4) for the valve core (1) to slide back and forth. Correspondingly, when the valve core (1) slides back and forth in the control area, the first liquid channel (101) and the second liquid channel (102) are both used to connect the first channel (301) and the second channel (401); when the valve core (1) abuts against the support block (4), the first liquid channel (101) is blocked by the support block (4), and the second liquid channel (102) is normally open and used to connect the first channel (301) and the second channel (401). Accordingly, the outer surface of the support block (4) facing the sub-cavity is configured as the second sealing surface.

7. The damping control solenoid valve according to claim 6, characterized in that, It also includes a drive shaft (5) and a return spring (6); the drive shaft (5) is constructed as a magnetic core shaft that passes through the support block (4) and connects to the valve core (1); the return spring (6) is sleeved on the valve core (1) and located between the valve core (1) and the valve sleeve (3).

8. The damping control solenoid valve according to claim 7, characterized in that, The valve body (2) is covered with a valve shell (7), and a drain channel (8) connecting the second channel (401) and the outside is left between the valve body (2) and the valve shell (7); accordingly, the drive shaft (5) is connected to the valve shell (7) through the bearing (9); The valve housing (7) is provided with a limiting block (10) and a valve plate (11). The limiting block (10) has two opposing outer surfaces, one of which is connected to the valve plate (11) and the other is set opposite to the support block (4). Accordingly, the gap between the limiting block (10) and the support block (4) is constructed as part of the drainage channel (8).

9. The damping control solenoid valve according to claim 8, characterized in that, The valve housing (7) is provided with an additional seat (12) located on the valve plate (11), and the additional seat (12) is provided with a bearing (9) for connecting the drive shaft (5) and the valve housing (7).

10. The damping control solenoid valve according to any one of claims 1-9, characterized in that, It also includes a main valve zone (100), a pilot zone (200) and an electromagnet zone (300) connected in sequence, a pressure relief channel between the pilot zone (200) and the electromagnet zone (300), and the opening degree of the pilot zone valve core, which together regulate the hydraulic pressure of the main valve zone (100); the electromagnet zone (300) is used to control the operation of the valve core (1).

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