Hydraulic valve with bidirectional hydraulic lock

Abstract

The utility model relates to the technical field of hydraulic valves, in particular to a hydraulic valve with a bidirectional hydraulic lock, which comprises a valve body, a first oil inlet, a second oil inlet, a first oil outlet, a second oil outlet and a slide valve cavity which are communicated with one another are arranged in the valve body, and a slide valve is slidably arranged in the slide valve cavity. A first hollow valve sleeve and a second hollow valve sleeve are arranged in sliding valve cavities in the two sides of the sliding valve correspondingly, a first valve element and a second valve element are elastically connected into the first valve sleeve and the second valve sleeve correspondingly, 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 correspondingly. A reversing valve element is arranged below the sliding valve cavity in a penetrating mode, a plurality of annular grooves are formed in the periphery of the reversing valve element, and a driving mechanism is arranged on one side of the valve body. Therefore, two different passages can be formed in the valve body by moving the reversing valve element, ascending and descending are controlled separately, ascending and descending speed can be adjusted and controlled conveniently, internal pressure of the valve body is reduced, and sealing performance of the valve body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic valves, in particular to a hydraulic valve with a bidirectional hydraulic lock. Background Art

[0002] A hydraulic valve is an automatic component operated by pressure oil. It is controlled by the pressure oil of a pressure regulating valve. It is usually used in combination with an electromagnetic pressure regulating valve and can be used to remotely control the on / off of the oil, gas, and water pipeline systems of a hydropower station. It is often used for clamping, controlling, lubricating, and other oil circuits. There are direct-acting and pilot-operated types, and the pilot-operated type is more commonly used.

[0003] At present, the existing hydraulic valves are mostly bidirectional simultaneous feedback valve structures, which have limited usage methods and cannot separately control the rising and falling processes (rising is the oiling process, and falling is the oil draining process). It is also difficult to control the rising and falling speeds, which makes them inconvenient to use.

[0004] How to form two different passages in the valve body by moving the reversing valve core, separately controlling the rise and fall, facilitating the regulation of the rise and fall speeds, while reducing the internal pressure of the valve body and improving the sealing of the valve body 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 hydraulic valve with a two-way hydraulic lock, which has a simple structure and is easy to use. It can form two different passages in the valve body by moving the reversing valve core, and control the rise and fall separately, which is convenient for regulating the speed of rise and fall, and at the same time reduces the internal pressure of the valve body and improves the sealing of the valve body.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a hydraulic valve with a two-way hydraulic lock, 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 is provided in the valve body, a sliding valve is slidably provided in the sliding valve cavity, and a first valve core and a second valve core matched with the sliding valve are elastically connected on both sides of the sliding valve in the sliding valve cavity, a first avoidance hole matched with the sliding valve is provided between the sliding valve and the first valve core, a second avoidance hole matched with the sliding valve is provided between the sliding valve and the second valve core, and a side of the sliding valve cavity at the second valve core close to the second oil inlet is connected to a single-acting drain port.

[0008] A reversing valve core is inserted into the sliding valve cavity, and a plurality of annular grooves cooperating with the first oil inlet and the second oil inlet are arranged on the outer periphery of the reversing valve core. A driving mechanism for driving the reversing valve core is arranged on one side of the valve body.

[0009] According to the hydraulic valve with a two-way hydraulic lock 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.

[0010] According to the hydraulic valve with a bidirectional hydraulic lock of the utility model, the sliding valve includes an abutting portion abutting against the valve body, the cross-sectional area of ​​the sliding valve abutting portion is three times the cross-sectional area of ​​the first avoidance hole, and the area of ​​the cross-section of one end of the first valve core close to the sliding valve is larger than the area of ​​the cross-section of one end of the second valve core close to the sliding valve.

[0011] According to the hydraulic valve with a two-way hydraulic lock 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 with 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.

[0012] According to the hydraulic valve with a two-way hydraulic lock of the utility model, the driving mechanism includes an outer shell connected to the valve body, a rotatable driving rod is rotatably connected inside the outer shell, a driving gear is sleeved on the driving rod, the driving gear meshes with the transmission gear, the transmission gear meshes with the driven gear at one end away from the driving gear, the driven gear is sleeved on the outside of the driven rod, a sliding sleeve is threadedly sleeved on the driven rod, and the sliding sleeve is connected to the reversing valve core at one end close to the valve body.

[0013] According to the hydraulic valve with a bidirectional hydraulic lock 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.

[0014] According to the hydraulic valve with a bidirectional hydraulic lock 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.

[0015] According to the hydraulic valve with a bidirectional hydraulic lock of the utility model, one end of the reversing valve core away from the sliding sleeve passes through the valve body, and an end cover for sealing the reversing valve core is provided on the valve body.

[0016] According to the hydraulic valve with a two-way hydraulic lock 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 blocking member, and between the second valve sleeve and the blocking 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 hydraulic valve with a two-way hydraulic lock, including a reversing valve core. The reversing valve core cooperates with the sliding valve and other structures to form two different passages in the valve body 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 divert the flow to reduce pressure; the end of the reversing valve core away from the sliding sleeve passes through the valve body, and the valve body is provided with an end cover to block the reversing valve core to improve the sealing during movement. In summary, the beneficial effects of the utility model are: by moving the reversing valve core, two different passages are formed in the valve body to separately control the rise and fall, which is convenient for regulating the speed during rise and fall, while reducing the internal pressure of the valve body and improving the sealing of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the structural diagram of the utility model;

[0019] Figure 2 It is a cross-sectional view inside the valve body when rising;

[0020] Figure 3 It is a cross-sectional view inside the valve body when descending;

[0021] Figure 4 It is an exploded view of the utility model;

[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, 16-reversing valve core, 161-ring groove, 162-end cover, 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 member, 7-blocking member, 8-single-acting drain port, 9-driving mechanism, 91-housing, 92-driving rod, 921-driving gear, 93-transmission gear, 94-driven gear, 941-driven rod, 95-sliding sleeve. 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 4 The utility model provides a hydraulic valve with a bidirectional hydraulic lock, comprising a valve body 1 ( Figure 1The valve body 1 is provided with a first oil inlet 11, a second oil inlet 12, a first oil outlet 13 and a second oil outlet 14, 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, and a sliding valve cavity 15 is provided 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 cavity 15 is provided with a first oil inlet 11, the second oil inlet 12, the first oil outlet 13 and the second oil outlet 14, and the sliding valve cavity 15 is provided with a second ... first oil inlet 11, the second oil inlet 12, the first oil outlet 13 and the second oil outlet 14, and the sliding valve cavity 15 is provided with a first oil inlet 11, the second oil inlet 12, the first oil outlet 13 and the second oil outlet 1 A sliding valve 151 is provided, 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 provided 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 the first valve sleeve 2 and the second valve sleeve 3 are respectively provided with a first avoidance hole 22 and a second avoidance hole 32 at one end close to the sliding valve 151, and the first valve sleeve 2 and the second valve sleeve 3 are both threadedly connected to a blocking member 7 at one end away from the sliding valve 151, and a first valve sleeve 2 is elastically connected to the first valve sleeve 2. The valve core 21 (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 with the second valve core 31 (the second valve core 31 and the second valve sleeve 3 are connected to each other). 3 is the same as the connection 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 caliber of the second avoidance hole 32, and the outer diameter of the second valve core 31 is larger than the caliber 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, and the first valve sleeve 2 and the second valve sleeve 3 are both surrounded by a plurality of through holes 4 on one side 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 , the sliding valve chamber 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 allows 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 reduce pressure. A driving mechanism 9 is provided on one side of the valve body 1. The driving mechanism 9 includes a shell 91 connected to the valve body 1. A driving rod 92 is rotatably connected in the shell 91. The driving rod 92 is connected to a driving member (not shown in the figure). The driving member can drive the driving rod 92 to rotate. The driving rod 92 is connected to the shell 91. A driving gear 921 is sleeved on the driving rod 92. The driving gear 921 can rotate with the driving rod 92. The driving gear 921 meshes with a transmission gear 93. The transmission gear 93 is rotatably connected to the shell 91. One end of the driven gear 93 away from the driving gear 921 meshes with the driven gear 94, and the driven gear 94 can rotate with the transmission gear 93. The driven gear 94 is sleeved on the outside of the driven rod 941, and the driven gear 94 can drive the driven rod 941 to rotate. A sliding sleeve 95 is threadedly sleeved on the driven rod 941, and the sliding sleeve 95 is slidably connected to the shell 91 (the sliding sleeve 95 is symmetrically provided with plug blocks, and the shell 91 is provided with slots that match the plug blocks, and the plug blocks are all slidably arranged in the slots); the driving rod 92 is rotated, and the driving rod 92 drives the driving gear 921, the transmission gear 93, the driven gear 94 and the driven rod 941 to rotate. Under the restriction of the plug blocks and the slots, the sliding sleeve 95 cannot rotate with the driven rod 941 and can only move horizontally in the shell 91. A reversing valve core 16 is penetrated below the sliding valve chamber 15 (a sliding seal is provided between the reversing valve core 16 and the valve body 1, Figure 2 and Figure 3 The sliding sleeve 95 is in the state when the connection with the reversing valve core 16 is disconnected after disassembly), the end of the sliding sleeve 95 close to the valve body 1 is connected to the reversing valve core 16, the sliding sleeve 95 can drive the reversing valve core 16 to move horizontally, the end of the reversing valve core 16 away from the sliding sleeve 95 passes through the valve body 1, and the valve body 1 is provided with an end cover 162 for blocking the reversing valve core 16, and the outer periphery of the reversing valve core 16 is provided with a plurality of annular grooves 161 cooperating with the first oil inlet 11 and the second oil inlet 12, so that when the reversing valve core 16 is pulled, the movement path of the oil inside the valve body 1 can be adjusted.

[0031] See also Figure 1 to Figure 4 Preferably, the driving member is a motor to provide power for the device.

[0032] 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, between the second valve sleeve 3 and the blocking member 7, and between the reversing valve core 16 and the valve body 1 (the outer periphery of the first valve sleeve 2, the outer periphery of the second valve sleeve 3, the outer periphery of the reversing valve core 16, and the outer periphery of the sliding valve 151 are all 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, between the second valve sleeve 3 and the blocking member 7, and between the reversing valve core 16 and the valve body 1.

[0033] 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 for opening 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. When the drive mechanism 9 pushes the reversing valve core 16 so that an annular groove 161 of the reversing valve core 16 corresponds to the first oil inlet 11 (at this time, the reversing valve core 16 blocks the second oil inlet 12), the oil can pass through the first oil inlet 11, push open the first valve core 21, and then flow out from the first oil outlet 13 (see Figure 2 , i.e. the rising process), the drive mechanism 9 is used to push the reversing valve core 16, so that one annular groove 161 of the reversing valve core 16 corresponds to the second oil inlet 12. Since the working pressure at the first avoidance hole 22 is greater than the working pressure at the second avoidance hole 32, the oil passes through the second oil inlet 12 and pushes the slide valve 151. The slide valve 151 is used to push the first valve core 21 open, so that the oil at the first oil outlet 13 can flow back (see Figure 3 , that is, the descending process), and at the same time, the excess oil in the descending process pushes open the second valve core 31 and flows into the single-acting drain port 8 to reduce the pressure. If it is necessary to use the first oil outlet 13 and the second oil outlet 14 at the same time, the second oil outlet 14 can also be left unblocked. Since the working pressure at the first avoidance hole 22 and the second avoidance hole 32 is different, the oil outlet and return are controlled according to the pressure of the controlled oil.

[0034] 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 hydraulic valve with a bidirectional hydraulic lock, 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 matched with the slide valve are elastically connected to the two sides of the slide valve in the slide valve cavity, a first avoidance hole matched with the slide valve is provided between the slide valve and the first valve core, a second avoidance hole matched with the slide valve is provided between the slide valve and the second valve core, and a side of the slide valve cavity at the second valve core close to the second oil inlet is communicated with a single-acting drain port; A reversing valve core is inserted into the sliding valve cavity, and a plurality of annular grooves cooperating with the first oil inlet and the second oil inlet are arranged on the outer periphery of the reversing valve core. A driving mechanism for driving the reversing valve core is arranged on one side of the valve body.

2. The hydraulic valve with a bidirectional hydraulic lock 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 hydraulic valve with a bidirectional hydraulic lock according to claim 1, characterized in that: The sliding valve includes an abutting portion abutting against the valve body, the cross-sectional area of ​​the sliding valve abutting portion is three times the cross-sectional area of ​​the first avoidance hole, and 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.

4. The hydraulic valve with a bidirectional hydraulic lock 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 hydraulic valve with a bidirectional hydraulic lock according to claim 1, characterized in that: The driving mechanism includes a shell connected to the valve body, a rotatable driving rod rotatably connected in the shell, a driving gear sleeved on the driving rod, the driving gear meshing with the transmission gear, the transmission gear meshing with the driven gear at one end away from the driving gear, the driven gear sleeved on the outside of the driven rod, a sliding sleeve threadedly sleeved on the driven rod, and the sliding sleeve is connected to the reversing valve core at one end close to the valve body.

6. The hydraulic valve with a bidirectional hydraulic lock 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 hydraulic valve with a bidirectional hydraulic lock 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 hydraulic valve with a bidirectional hydraulic lock according to claim 5, characterized in that: One end of the reversing valve core away from the sliding sleeve passes through the valve body, and an end cover for sealing the reversing valve core is arranged on the valve body.

9. The hydraulic valve with a bidirectional hydraulic lock 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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