Balanced bidirectional lock

Abstract

The utility model discloses a balance two-way lock which comprises a valve element assembly, and the valve element assembly comprises a liquid inlet valve sleeve, a threaded sleeve, a valve element, a valve rod, an ejector rod, a first spring which is arranged in the liquid inlet valve sleeve and used for applying elastic acting force to the ejector rod, and a second spring which is arranged in the threaded sleeve and used for applying elastic acting force to the valve element. The ejector rod is movably arranged in the liquid inlet valve sleeve, the valve rod and the valve element are movably arranged in the threaded sleeve, the liquid inlet valve sleeve is in threaded connection with the threaded sleeve, the valve rod is connected with the ejector rod, and the valve element is arranged on the valve rod in a sleeving mode. The balance two-way lock and the valve core assembly form a plug-in mounting structure, so that the system integration degree of the whole balance two-way lock is high, the balance two-way lock is convenient to mount and maintain, that is, the balance two-way lock is simple to mount and convenient to maintain, and the balance two-way lock can be repaired by directly replacing the plug-in mounting type valve core assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine fully-mechanized mining hydraulic supports, and in particular relates to a balanced bidirectional lock. Background Art

[0002] The balancing two-way lock is mainly used in coal mine hydraulic supports. It works together with the operating valve group to control the balance of the hydraulic support and assist the jack in operation. When the operating valve group is in the neutral position and the external force structure does not reach the opening pressure of the safety valve, it can keep the jack in a certain working state for a long time, so that the hydraulic support can play its due supporting role under the action of external forces.

[0003] Chinese patent application number 202121020433.5 discloses a balanced bidirectional lock for a fully-mechanized mining support in complex coal seams. The lock comprises a valve body and a valve cover, with a sealing ring fixedly connected to one side of the valve cover; a valve seat movably mounted within the valve body and having a mounting slot defined on the outside of the valve seat; and a position limiting assembly movably mounted within the mounting slot.

[0004] It is desirable to provide an improved balanced two-way lock, particularly with respect to improving integration and facilitating installation and maintenance. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a balanced two-way lock, the purpose of which is to improve integration and facilitate installation and maintenance.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a balanced two-way lock, including a valve core assembly, the valve core assembly including an inlet valve sleeve, a screw sleeve, a valve core, a valve stem, a push rod, a first spring in the inlet valve sleeve and used to apply an elastic force to the push rod, and a second spring arranged in the screw sleeve and used to apply an elastic force to the valve core, the push rod is movably arranged in the inlet valve sleeve, the valve stem and the valve core are movably arranged in the screw sleeve, the inlet valve sleeve and the screw sleeve are threadedly connected, the valve stem is connected to the push rod, and the valve core is sleeved on the valve stem.

[0007] The valve stem and the push rod are threadedly connected.

[0008] The end of the valve stem is provided with an external thread, and the end of the push rod is provided with a threaded hole for the end of the valve stem to be inserted.

[0009] The valve stem includes a first guide portion, a second guide portion and a connecting portion connected in sequence, the connecting portion is connected to the push rod, the valve core is sleeved on the second guide portion, and the interior of the screw sleeve is provided with a first guide hole for accommodating the first guide portion and a second guide hole for accommodating the second guide portion and the valve core.

[0010] The diameter of the first guide portion is greater than the diameter of the second guide portion.

[0011] A valve pad is arranged between the second spring and the screw sleeve, and the valve rod passes through the valve pad.

[0012] The first spring is a cylindrical helical spring.

[0013] The second spring is a cylindrical helical spring.

[0014] The valve core assembly of the utility model forms an insert structure, so that the system integration of the whole balanced bidirectional lock is higher, and the installation and maintenance of the balanced bidirectional lock are facilitated, namely, the installation is simple, the maintenance is convenient, and the balanced bidirectional lock can be repaired by directly replacing the insert valve core assembly. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present specification includes the following drawings, and the shown contents are respectively:

[0016] Figure 1 It is a structure schematic view of the balanced bidirectional lock of the utility model;

[0017] Figure 2 It is a sectional view of the valve core assembly;

[0018] Figure 3 It is a structure schematic view of the valve rod;

[0019] Marked in the figure: 1, screw sleeve; 2, second spring; 3, valve core; 4, valve seat; 5, first spring; 6, top rod; 7, liquid inlet valve sleeve; 8, valve body; 9, valve pad; 10, first liquid passage; 11, second liquid passage; 13, valve rod; 14, first guide portion; 15, second guide portion; 16, connecting portion. DETAILED DESCRIPTION

[0020] The specific embodiment of the utility model is further explained in detail by comparing the drawings and describing the embodiments, the purpose is to help the technical personnel in the field to have more complete, accurate and deep understanding to the conception and technical scheme of the utility model, and help to implement.

[0021] It should be noted that in the following embodiments, the "first" and "second" do not represent the absolute division relationship of structure and / or function, nor represent the execution order, but only for the convenience of description.

[0022] As Figures 1 to 3 The utility model provides a balanced bidirectional lock, including valve body and valve core assembly, two valve cavities are arranged in valve body 8, the axis of two valve cavities is parallel, and two valve core assemblies are installed in two valve cavities respectively.

[0023] As Figure 2As shown in the figure, the valve core assembly includes a liquid inlet valve sleeve 7, a screw sleeve 1, a valve seat 4, a valve core 3, a valve rod 13, a top rod 6, a first spring 5 arranged in the liquid inlet valve sleeve 7 and used to apply an elastic force to the top rod 6, and a second spring 2 arranged in the screw sleeve 1 and used to apply an elastic force to the valve core 3. The top rod 6 is movably arranged in the liquid inlet valve sleeve 7, the valve rod 13 and the valve core 3 are movably arranged in the screw sleeve 1, and the liquid inlet valve sleeve 7 and the screw sleeve 1 are threadedly connected.

[0024] As shown in the figure, Figure 2 The liquid inlet valve sleeve 7 is provided with a first liquid passage hole 10, and the first liquid passage hole 10 of the liquid inlet valve sleeve 7 is in communication with the liquid inlet hole arranged on the valve body 8. The screw sleeve 1 is provided with a second liquid passage hole 11, and the second liquid passage hole 11 of the screw sleeve 1 is in communication with the liquid outlet hole arranged on the valve body 8. The first liquid passage hole 10 and the second liquid passage hole 11 are provided in multiple.

[0025] As shown in the figure, Figure 1 And Figure 2 The screw sleeve 1 is inserted into the valve cavity of the valve body 8 and is threadedly connected with the valve body 8. The liquid inlet valve sleeve 7 is located in the valve cavity of the valve body 8. The liquid inlet valve sleeve 7 is provided with an unloading cavity. The head of the top rod 6 extends into the unloading cavity of the liquid inlet valve sleeve 7, and the tail of the top rod 6 is located inside the liquid inlet valve sleeve 7. The valve core 3 is built in the screw sleeve 1. The valve seat 4 is fixedly arranged between the liquid inlet valve sleeve 7 and the screw sleeve 1. The head of the valve core 3 is in sealing connection with the valve seat 4. A second spring 2 is further arranged between the valve core 3 and the screw sleeve 1. The second spring 2 pushes the valve core 3 to slide in the screw sleeve 1, so that the head of the valve core 3 can be in contact with the top rod 6. One end of the second spring 2 is sleeved on the valve core 3, and the other end of the second spring 2 is arranged with a valve pad 9 between the inner wall surface of the screw sleeve 1. The second spring 2 is a cylindrical helical spring and is a compression spring. The valve pad 9 is made of 3Cr13 and has good corrosion resistance and mechanical properties.

[0026] As shown in the figure, Figure 2 The top rod 6 is moved towards the valve core 3 under the push of the emulsion liquid entering the valve body 8 from the working port. First, the top rod 6 is in contact with the valve core 3 and pushes the valve core 3 to move. The valve core 3 is separated from the valve seat 4. At this time, the inner cavity of the liquid inlet valve sleeve 7 is in communication with the inner cavity of the screw sleeve 1. A limiting block is arranged at a position adjacent to the unloading cavity in the inner part of the liquid inlet valve sleeve 7. A through hole is arranged on the limiting block. A first spring 5 is further sleeved on the top rod 6. The first spring 5 is a cylindrical helical spring and is a compression spring. One end of the first spring 5 abuts against the limiting block, and the other end abuts against the tail of the top rod 6.

[0027] As shown in the figure, Figure 2As shown in the figures, the head of the valve core 3 is a frustum structure, and the head of the valve core 3 no longer extends into the unloading cavity of the inlet valve sleeve 7, and the top rod 6 only contacts the valve core 3 at the central hole of the valve seat 4, so that the structure of the valve core assembly is simpler. In addition, the valve core 3 and the valve seat 4 are hard sealed, the valve rod 13, the top rod 6, the valve core 3 and the valve seat 4 are all made of 3Cr13 metal material, compared with soft sealing, hard sealing not only has good sealing performance, but also can withstand super high pressure, which can prolong the service life of the bidirectional lock.

[0028] As shown in the figures, Figure 2 and Figure 3 , the valve rod 13 and the top rod 6 are threadedly connected, and the valve rod 13 and the top rod 6 move synchronously along the axial direction. The end of the valve rod 13 is provided with external threads, and the end of the top rod 6 is provided with a threaded hole into which the end of the valve rod 13 is inserted. The valve core and the second spring 2 are sleeved on the valve rod 13, and the valve rod 13 is coaxially arranged with the top rod 6 and the valve core and the valve seat 4.

[0029] The valve rod 13 and the top rod 6 are threadedly connected, and the screw sleeve 1 and the inlet valve sleeve 7 are threadedly connected, forming a plug-in type valve core assembly, so that the system integration of the entire bidirectional lock is high, and the installation and maintenance of the bidirectional lock are convenient, that is, the installation is simple, the maintenance is convenient, and the one-way valve can be repaired by directly replacing the plug-in type valve core assembly.

[0030] As shown in the figures, Figure 2 and Figure 3 , the valve rod 13 includes a first guide portion 14, a second guide portion 15 and a connecting portion 16 connected in sequence, the connecting portion 16 is connected with the top rod 6, the valve core is sleeved on the second guide portion 15, the inside of the screw sleeve 1 is provided with a first guide hole accommodating the first guide portion 14 and a second guide hole accommodating the second guide portion 15 and the valve core, the first guide hole and the second guide hole are communicated and arranged in sequence along the axial direction of the screw sleeve 1, and the diameter of the first guide hole is smaller than that of the second guide hole. The first guide portion 14 and the second guide portion 15 are both cylindrical, the diameter of the first guide portion 14 is greater than that of the second guide portion 15, the first guide portion 14, the second guide portion 15 and the connecting portion 16 are coaxially arranged, and the valve pad 9 is clamped between the second spring 2 and the end face of the first guide portion 14. The outer diameter of the second guide portion 15 is the same as the diameter of the central hole of the valve core 3, the second guide portion 15 passes through the valve pad 9 and the central hole of the valve core, and the second spring 2 is sleeved on the second guide portion 15. The connecting portion 16 is provided with external threads, the connecting portion 16 is inserted into the internal threaded hole of the top rod 6, and the outer diameter of the top rod 6 is greater than the diameter of the central hole of the valve core 3. This design makes the valve rod 13 and the valve core more stable in overall structure, reduces the shaking or deviation caused by different shafts, and improves the sealing performance and operation stability of the valve.

[0031] As shown in the figures, Figure 2 and Figure 3As shown, the screw sleeve 1 limits the valve rod 13 in the axial direction, a first sealing ring is arranged between the first guide part 14 and the inner circular surface of the first guide hole, the first sealing ring is an O-shaped ring, and the first sealing ring improves the sealing performance between the first guide part 14 and the screw sleeve 1.

[0032] The utility model is described exemplarily above in combination with the drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned mode. As long as various non-essential improvements are made by adopting the method concept and technical scheme of the utility model; or the above-mentioned concept and technical scheme of the utility model are directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. Balanced two-way lock, including valve core assembly, characterized by: The valve core assembly includes an inlet valve sleeve, a screw sleeve, a valve core, a valve stem, a push rod, a first spring in the inlet valve sleeve for applying an elastic force to the push rod, and a second spring arranged in the screw sleeve for applying an elastic force to the valve core. The push rod is movably arranged in the inlet valve sleeve, the valve stem and the valve core are movably arranged in the screw sleeve, the inlet valve sleeve and the screw sleeve are threadedly connected, the valve stem is connected to the push rod, and the valve core is sleeved on the valve stem.

2. The balanced two-way lock according to claim 1, characterized in that: The valve stem and the push rod are threadedly connected.

3. The balanced two-way lock according to claim 2, characterized in that: The end of the valve stem is provided with an external thread, and the end of the push rod is provided with a threaded hole for the end of the valve stem to be inserted.

4. The balanced two-way lock according to any one of claims 1 to 3, characterized in that: The valve stem includes a first guide portion, a second guide portion and a connecting portion connected in sequence, the connecting portion is connected to the push rod, the valve core is sleeved on the second guide portion, and the interior of the screw sleeve is provided with a first guide hole for accommodating the first guide portion and a second guide hole for accommodating the second guide portion and the valve core.

5. The balanced two-way lock according to claim 4, characterized in that: The diameter of the first guide portion is greater than the diameter of the second guide portion.

6. The balanced two-way lock according to any one of claims 1 to 3, characterized in that: A valve pad is arranged between the second spring and the screw sleeve, and the valve stem passes through the valve pad.

7. The balanced two-way lock according to any one of claims 1 to 3, characterized in that: The first spring is a cylindrical coil spring.

8. The balanced two-way lock according to any one of claims 1 to 3, characterized in that: The second spring is a cylindrical coil spring.

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