Variable cross-section bidirectional control mechanism

Abstract

The utility model relates to the technical field of hydraulic locks, in particular to a variable cross-section two-way control mechanism which comprises a valve body, a sliding valve is arranged in a sliding valve cavity in a sliding mode, a first hollow valve sleeve and a second hollow valve sleeve are arranged in the sliding valve cavity on the two sides of the sliding valve respectively, and a first receding hole and a second receding hole are formed in the ends, close to the sliding valve, of the first valve sleeve and the second valve sleeve respectively. The ends, away from the sliding valve, of the first valve sleeve and the second valve sleeve are both in threaded connection with blocking pieces, a first valve element is elastically connected into the first valve sleeve, a second valve element is elastically connected into the second valve sleeve, and a plurality of through holes are annularly formed in the peripheries of the sides, close to the sliding valve, of the first valve sleeve and the second valve sleeve. The sectional area of the sliding valve abutting part is three times that of the first receding hole, and the side, close to the second oil inlet, of the sliding valve cavity in the position of the second valve sleeve communicates with a single-action drainage opening. Therefore, two different passages can be formed on the two sides of the slide valve, ascending and descending are controlled separately, and meanwhile, a drainage channel is arranged, bypass flow division is achieved, and pressure is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic locks, in particular to a variable-section bidirectional control mechanism. Background Art

[0002] A two-way hydraulic lock is generally referred to as a double hydraulically controlled one-way valve. It refers to two hydraulically controlled one-way valves forming a two-way hydraulic lock. The principle is that the two hydraulically controlled one-way valves take the pressure of the other side's oil circuit as the pilot oil. When there is no pressure in one pipeline, the other side is closed at the same time. It is usually used in working conditions where the oil needs to be pressure maintained.

[0003] At present, the existing two-way hydraulic lock, such as the Chinese patent with publication number CN220828387U, discloses a two-way hydraulic lock with improved sealing performance, including a two-way hydraulic lock, a fixed disk, a fixing screw, a first sealing ring and a second sealing ring. Fixed disks are provided on both sides of the two-way hydraulic lock, and a plurality of fixing screws are rotatably connected on the sides of the fixed disks away from each other. The fixing screws are all threadedly connected to the two-way hydraulic lock, and the first sealing rings are connected on the sides of the fixed disks close to each other. The first sealing rings are in contact with adjacent fixing screws, and the second sealing rings are connected to the fixed disks. The second sealing rings and the first sealing rings are in contact with the two-way hydraulic lock, which threadedly connects the oil supply pipe to the connecting guide wire nozzle. When the oil pipe shakes, the connecting guide wire nozzle is driven to move, so that the second spring is squeezed, contracted and then rebounded, so as to achieve the effect of buffering and protecting the oil pipe when the oil pipe shakes to avoid the oil pipe from rupturing. However, the above device cannot separately control the rising and falling processes (rising is the oiling process, and falling is the oil draining process), and the application and adjustment range are limited, which is inconvenient to use.

[0004] How to form two different passages on both sides of the sliding valve to control the rise and fall separately, and at the same time set up a leakage channel to bypass and divert the flow to reduce the pressure has become a technical problem that needs to be broken through.

[0005] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0006] In view of the above-mentioned defects, the purpose of the utility model is to provide a variable-section bidirectional control mechanism, which has a simple structure and is easy to use. It can form two different passages on both sides of the sliding valve to separately control the rise and fall. At the same time, a leakage channel is set to bypass and divert the flow to reduce pressure.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a variable-section bidirectional control mechanism, including a valve body, a sliding valve cavity connected to a first oil inlet, a second oil inlet, a first oil outlet and a second oil outlet of the valve body, a sliding valve is slidingly arranged in the sliding valve cavity, and a first valve core and a second valve core are elastically connected on both sides of the sliding valve in the sliding valve cavity, a first avoidance hole cooperating with the sliding valve is provided between the sliding valve and the first valve core, and a second avoidance hole cooperating with the sliding valve is provided between the sliding valve and the second valve core.

[0008] The slide valve includes an abutting portion abutting against the valve body, and a cross-sectional area of ​​the slide valve abutting portion is larger than a cross-sectional area of ​​the first avoidance hole.

[0009] A side of the slide valve cavity at the second valve core close to the second oil inlet is connected to the single-acting drain port.

[0010] According to the variable-section bidirectional control mechanism of the utility model, the first valve core and the second valve core are both externally sleeved with a first valve sleeve and a second valve sleeve, the first valve core is elastically connected to the first valve sleeve, the second valve core is elastically connected to the second valve sleeve, a plurality of through holes are arranged around the outer periphery of one side of the first valve sleeve and the second valve sleeve close to the sliding valve, and a detachable plugging member is connected to one end of the first valve sleeve and the second valve sleeve away from the sliding valve.

[0011] According to the variable cross-section bidirectional control mechanism of the utility model, the cross-sectional area of ​​one end of the first valve core close to the sliding valve is larger than the cross-sectional area of ​​one end of the second valve core close to the sliding valve, and the cross-sectional area of ​​the sliding valve abutment portion is three times the cross-sectional area of ​​the first avoidance hole.

[0012] According to the variable-section bidirectional control mechanism of the utility model, a convex ring is provided on the outer periphery of the first valve core in the first valve sleeve, a groove matching the convex ring is provided in the first valve sleeve, the convex ring is slidably arranged in the groove, and an elastic member is provided between the first valve core and the sealing member.

[0013] According to the variable-cross-section bidirectional control mechanism of the utility model, the elastic member is a spring.

[0014] According to the variable cross-section bidirectional control mechanism of the utility model, the cross-sectional diameter of one end of the first valve core close to the sliding valve is smaller than the caliber of the first avoidance hole, and the outer diameter of the first valve core is larger than the caliber of the first avoidance hole.

[0015] According to the variable cross-section bidirectional control mechanism of the utility model, the cross-sectional diameter of one end of the second valve core close to the sliding valve is smaller than the caliber of the second avoidance hole, and the outer diameter of the second valve core is larger than the caliber of the second avoidance hole.

[0016] According to the variable-section bidirectional control mechanism of the utility model, a plurality of sealing rings are provided between the first valve sleeve and the valve body, between the second valve sleeve and the valve body, between the sliding valve and the valve body, between the first valve sleeve and the sealing member, and between the second valve sleeve and the sealing member, and the outer periphery of the first valve sleeve, the outer periphery of the second valve sleeve, and the outer periphery of the sliding valve are provided with sealing grooves matching with the sealing rings.

[0017] The purpose of the utility model is to provide a variable cross-section bidirectional control mechanism, including a first valve core and a second valve core, the first valve core and the second valve core cooperate with the sliding valve and other structures, so that two different passages can be formed on both sides of the sliding valve to separately control the rise and fall; the sliding valve cavity at the second valve sleeve is connected to the single-acting drain port, and the single-acting drain port and the second oil inlet are located on the same side, and the single-acting drain port can be used as a drain channel to bypass and reduce pressure. In summary, the beneficial effects of the utility model are: it can form two different passages on both sides of the sliding valve to separately control the rise and fall, and at the same time set a drain channel to bypass and reduce pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a longitudinal sectional view of the utility model;

[0019] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0020] Figure 3 is a cross-sectional view of the first valve sleeve;

[0021] Figure 4 This is an exploded view of the second valve core;

[0022] In the figure: 1-valve body, 11-first oil inlet, 12-second oil inlet, 13-first oil outlet, 14-second oil outlet, 15-sliding valve chamber, 151-sliding valve, 2-first valve sleeve, 21-first valve core, 22-first avoidance hole, 3-second valve sleeve, 31-second valve core, 32-second avoidance hole, 4-through hole, 5-sealing groove, 51-sealing ring, 6-elastic part, 7-blocking part, 8-single-acting drain port. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "top / bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "sleeved / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0026] See also Figure 1 to Figure 4The utility model provides a variable cross-section bidirectional control mechanism, including a valve body 1, wherein a first oil inlet 11, a second oil inlet 12, a first oil outlet 13, and a second oil outlet 14 are arranged in the valve body 1, the first oil inlet 11 and the second oil inlet 12 are located on the same side, the first oil outlet 13 and the second oil outlet 14 are located on the same side, and the first oil inlet 11 and the first oil outlet 13 are arranged opposite to each other, and the second oil inlet 12 and the second oil outlet 14 are arranged opposite to each other, a sliding valve cavity 15 is arranged in the valve body 1, and the sliding valve cavity 15 communicates with the first oil inlet 11, the second oil inlet 12, the first oil outlet 13, and the second oil outlet 14, and the sliding valve A sliding valve 151 is slidably arranged in the cavity 15, and the sliding valve 151 includes an abutting portion located in the middle and a triggering portion extending to both sides (the cross-sectional area of ​​the abutting portion is larger than the cross-sectional area of ​​the triggering portion), and a hollow first valve sleeve 2 and a second valve sleeve 3 are respectively arranged in the sliding valve cavity 15 on both sides of the sliding valve 151 (the triggering portions on both sides of the sliding valve 151 are directly opposite to the first valve sleeve 2 and the second valve sleeve 3), and a first avoidance hole 22 and a second avoidance hole 32 are respectively arranged at one end of the first valve sleeve 2 and the second valve sleeve 3 close to the sliding valve 151, and a plugging member 7 is threadedly connected to one end of the first valve sleeve 2 and the second valve sleeve 3 away from the sliding valve 151, and an elastic connection is formed in the first valve sleeve 2. A first valve core 21 is connected (a convex ring is provided on the outer periphery of the first valve core 21 in the first valve sleeve 2, a groove matching the convex ring is provided in the first valve sleeve 2, the convex ring is slidably arranged in the groove, and an elastic member 6 is provided between the first valve core 21 and the blocking member 7), the cross-sectional diameter of one end of the first valve core 21 close to the sliding valve 151 is smaller than the diameter of the first avoidance hole 22, and the outer diameter of the first valve core 21 is larger than the diameter of the first avoidance hole 22, thereby, the first valve core 21 can be extended and retracted in the first valve sleeve 2, but the first valve core 21 will not fall out of the first valve sleeve 2, and the second valve sleeve 3 is elastically connected to the second valve core 31 (the second valve core 31, the second The connection method between the valve sleeves 3 is the same as the connection method between the first valve core 21 and the first valve sleeve 2, and its specific structure and working principle are not repeated here). The cross-sectional diameter of one end of the second valve core 31 close to the sliding valve 151 is smaller than the diameter of the second avoidance hole 32, and the outer diameter of the second valve core 31 is larger than the diameter of the second avoidance hole 32. Thereby, the first valve core 21 can be extended and retracted in the first valve sleeve 2, but the first valve core 21 will not fall out of the first valve sleeve 2. A plurality of through holes 4 are arranged on the outer periphery of one side of the first valve sleeve 2 and the second valve sleeve 3 close to the sliding valve 151, and the plurality of through holes 4 are respectively connected to the inside of the first valve sleeve 2 and the second valve sleeve 3.

[0027] See also Figure 1 to Figure 4 Furthermore, if there is no need to disassemble the first valve core 21 and the second valve core 31, the first valve sleeve 2 and the second valve sleeve 3 may not be set, and the first avoidance hole 22 and the second avoidance hole 32 may be directly opened in the valve body 1, and it is only necessary to ensure the sliding seal between the first valve core 21 and the second valve core 31 and the valve body 1.

[0028] See also Figure 1 to Figure 4Furthermore, the cross-sectional area of ​​the abutment portion of the sliding valve 151 is three times the cross-sectional area of ​​the first avoidance hole 22, the cross-sectional area of ​​the first avoidance hole 22 is larger than the cross-sectional area of ​​the second avoidance hole 32, and the cross-sectional area of ​​one end of the first valve core 21 close to the sliding valve 151 is larger than the cross-sectional area of ​​one end of the second valve core 31 close to the sliding valve 151.

[0029] See also Figure 1 to Figure 4 Preferably, the elastic member 6 is a spring to provide return power.

[0030] See also Figure 1 to Figure 4 Preferably, a plurality of sealing rings 51 are provided between the first valve sleeve 2 and the valve body 1, between the second valve sleeve 3 and the valve body 1, between the sliding valve 151 and the valve body 1, between the first valve sleeve 2 and the blocking member 7, and between the second valve sleeve 3 and the blocking member 7 (the outer periphery of the first valve sleeve 2, the outer periphery of the second valve sleeve 3, and the outer periphery of the sliding valve 151 are provided with sealing grooves 5 that cooperate with the sealing rings 51), so as to improve the sealing between the first valve sleeve 2 and the valve body 1, between the second valve sleeve 3 and the valve body 1, between the sliding valve 151 and the valve body 1, between the first valve sleeve 2 and the blocking member 7, and between the second valve sleeve 3 and the blocking member 7.

[0031] See also Figure 1 to Figure 4 Furthermore, the sliding valve cavity 15 at the second valve sleeve 3 is connected to the single-acting drain port 8, and the single-acting drain port 8 and the second oil inlet 12 are located on the same side. The setting of the single-acting drain port 8 enables the utility model to operate with a single port. When only the second oil inlet 12 and the second oil outlet 14 are used, the single-acting drain port 8 can be used as a drain channel to bypass and divert the flow to reduce the pressure.

[0032] See also Figure 1 to Figure 4 First, the second oil outlet 14 is blocked. Since the cross-sectional area of ​​the abutting portion of the slide valve 151 is three times the cross-sectional area of ​​the first avoidance hole 22, the working pressure at the first avoidance hole 22 (the pressure to open the first valve core 21) is greater than the working pressure at the second avoidance hole 32, so that two different passages can be formed on both sides of the slide valve 151 to separately control the rise and fall (the oil flows out of the first oil outlet 13 after passing through the first oil inlet 11 and pushing open the first valve core 21, which is the rise process; the oil flows through the second oil inlet 12, pushing the slide valve 151, and using the slide valve 151 to open the first valve core 21, which is the rise process). The valve 151 pushes open the first valve core 21 so that the oil in the first oil outlet 13 can flow back, that is, it descends. During the descent, the excess oil pushes open the second valve core 31 and flows into the single-acting drain port 8 to reduce the pressure). The user can configure the position of the valve stem and the valve body 1 according to actual conditions to achieve different flow requirements. If the first oil outlet 13 and the second oil outlet 14 need to be used at the same time, the second oil outlet 14 can also be left unblocked. Since the working pressures at the first avoidance hole 22 and the second avoidance hole 32 are different, the oil output and return are controlled according to the pressure of the controlled oil.

[0033] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A variable cross-section bidirectional control mechanism, characterized in that: The invention comprises a valve body, wherein a slide valve cavity is provided in the valve body and is communicated with a first oil inlet, a second oil inlet, a first oil outlet and a second oil outlet of the valve body, a slide valve is slidably provided in the slide valve cavity, a first valve core and a second valve core are elastically connected to the two sides of the slide valve in the slide valve cavity, a first avoidance hole cooperating with the slide valve is provided between the slide valve and the first valve core, and a second avoidance hole cooperating with the slide valve is provided between the slide valve and the second valve core; The slide valve comprises an abutting portion abutting against the valve body, and the cross-sectional area of ​​the slide valve abutting portion is larger than the cross-sectional area of ​​the first avoidance hole; A side of the slide valve cavity at the second valve core close to the second oil inlet is connected to the single-acting drain port.

2. The variable cross-section bidirectional control mechanism according to claim 1, characterized in that: The first valve core and the second valve core are both sleeved with a first valve sleeve and a second valve sleeve, the first valve core is elastically connected to the first valve sleeve, the second valve core is elastically connected to the second valve sleeve, a plurality of through holes are arranged around the outer periphery of the first valve sleeve and the second valve sleeve on one side close to the sliding valve, and a detachable plugging member is connected to one end of the first valve sleeve and the second valve sleeve away from the sliding valve.

3. The variable cross-section bidirectional control mechanism according to claim 1, characterized in that: The cross-sectional area of ​​one end of the first valve core close to the slide valve is larger than the cross-sectional area of ​​one end of the second valve core close to the slide valve, and the cross-sectional area of ​​the slide valve abutment portion is three times the cross-sectional area of ​​the first avoidance hole.

4. The variable cross-section bidirectional control mechanism according to claim 2, characterized in that: A convex ring is arranged on the outer periphery of the first valve core in the first valve sleeve, a groove cooperating with the convex ring is arranged in the first valve sleeve, the convex ring is slidably arranged in the groove, and an elastic member is arranged between the first valve core and the blocking member.

5. The variable cross-section bidirectional control mechanism according to claim 4, characterized in that: The elastic member is a spring.

6. The variable cross-section bidirectional control mechanism according to claim 1, characterized in that: The cross-sectional diameter of one end of the first valve core close to the slide valve is smaller than the diameter of the first avoidance hole, and the outer diameter of the first valve core is larger than the diameter of the first avoidance hole.

7. The variable cross-section bidirectional control mechanism according to claim 1, characterized in that: The diameter of the cross section of one end of the second valve core close to the slide valve is smaller than the diameter of the second avoidance hole, and the outer diameter of the second valve core is larger than the diameter of the second avoidance hole.

8. The variable cross-section bidirectional control mechanism according to claim 2, characterized in that: Several sealing rings are arranged between the first valve sleeve and the valve body, between the second valve sleeve and the valve body, between the sliding valve and the valve body, between the first valve sleeve and the sealing member, and between the second valve sleeve and the sealing member. The outer periphery of the first valve sleeve, the outer periphery of the second valve sleeve, and the outer periphery of the sliding valve are all provided with sealing grooves matching with the sealing rings.

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