Floating bidirectional lock

Abstract

The utility model discloses a floating two-way lock which comprises a valve body and a valve element assembly arranged in the valve body, the valve element assembly comprises a first valve sleeve, a second valve sleeve, a valve element, an ejector rod, a first spring and a second spring, the first spring exerts elastic acting force on the ejector rod, the second spring exerts elastic acting force on the valve element, and the second spring is a rectangular spring. One end of the second spring is inserted into the valve element, and the second spring is clamped between the valve element and the second valve sleeve. According to the floating two-way lock, the spring in the valve element assembly is the rectangular spring, under the same space condition, the rectangular section is larger in rigidity and small in size compared with a spiral compression spring, the occupied space can be reduced, it can be ensured that the floating two-way lock is closed in time, and work reliability is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of fully mechanized coal mine hydraulic support, and particularly relates to a floating bidirectional lock. BACKGROUND

[0002] The hydraulic support is an important machine in coal mining operation, and mainly relies on the column to support the roof beam, so that the support body is tightened against the roof. When the hydraulic support needs to be moved, the column is lowered through the hydraulic system, so that the roof beam is separated from the roof, and then the hydraulic support is moved to a new position.

[0003] The bidirectional lock is mainly used for the coal mine hydraulic support, and is used together with the control valve group to control the balance of the hydraulic support, and to protect and help the support jack to act. When the control valve group is in the middle position and the external force does not reach the opening pressure of the safety valve, the jack can be kept in a certain working state for a long time, so that the hydraulic support can play a supporting role under the action of the external force.

[0004] A balance floating bidirectional lock is disclosed in Chinese Patent No. 201310210828.5, which comprises a valve body, two valve sleeves and two sets of hydraulic components. The two sets of hydraulic components are symmetrically arranged in the valve cavity of the valve body. The hydraulic component comprises a valve core, a valve seat and a top rod. The valve seat is provided with a cavity body, the head of the top rod extends into the cavity body of the valve seat, and the tail of the top rod is located outside the valve seat. The head of the valve core is sealingly connected with the valve seat at the port of the cavity body on the valve seat. An external thread is arranged on the head of the top rod. A limiting block is arranged at the position close to the cavity body in the interior of the valve seat. A through hole is arranged on the limiting block, and an internal thread matched with the external thread on the top rod is arranged on the inner wall of the through hole. The valve seat and the top rod are threadedly connected, the top rod can be screwed into the cavity body in the valve seat, and a plug-in type hydraulic component is formed, so that the system integration degree of the entire balance floating bidirectional lock is high, the installation and maintenance are convenient, and the plug-in type hydraulic component can be directly replaced for repair.

[0005] The spring for applying elastic force to the valve core in the above-mentioned bidirectional lock is a cylindrical helical spring. When the required spring force is met, the spring occupies a large space, the spring volume is large, and the overall volume of the valve core assembly is large. Moreover, the cylindrical spring has poor rigidity, and when the spring force is insufficient, the timely closing of the bidirectional lock is affected, and the working reliability is affected.

[0006] It is desired to provide an improved floating bidirectional lock, and in particular to improve the working reliability of the floating bidirectional lock. CONTENT OF THE UTILITY MODEL

[0007] The present application aims to solve at least one of the technical problems in the prior art. To this end, the utility model provides a floating bidirectional lock, and the purpose is to improve the working reliability.

[0008] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a floating two-way lock, including a valve body and a valve core assembly arranged in the valve body, the valve core assembly including a first valve sleeve, a second valve sleeve, a valve core, a push rod, a first spring that applies an elastic force to the push rod and a second spring that applies an elastic force to the valve core, the second spring is a rectangular spring, one end of the second spring is inserted into the interior of the valve core, and the second spring is clamped between the valve core and the second valve sleeve.

[0009] The first spring is a cylindrical coil spring.

[0010] The valve core is provided with a first liquid hole, and the first liquid hole communicates with the inner cavity of the valve core and the inner cavity of the second valve sleeve.

[0011] A plurality of first liquid holes are provided on the valve core.

[0012] A control port and two liquid inlet holes are provided on the valve body. Two valve core assemblies are provided. The two liquid inlet holes are respectively communicated with two valve core assemblies located in the valve cavity. The control port is located between the two liquid inlet holes and is communicated with the valve cavity.

[0013] The valve body is provided with a first working port A1, a second working port A2, a third working port B1 and a fourth working port B2, and the valve body is provided with a first communicating hole and a second communicating hole. The first communicating hole is communicated with the first working port A1 and the second working port A2, and the second communicating hole is communicated with the third working port B1 and the fourth working port B2. The first communicating hole and the second communicating hole are respectively communicated with the two valve core assemblies.

[0014] The floating two-way lock of the utility model adopts a rectangular spring in the valve core assembly. Under the same space conditions, the rectangular cross-section has greater stiffness and smaller volume than the spiral compression spring, which can reduce the occupied space, ensure that the floating two-way lock is closed in time, and improve working reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] This manual includes the following drawings, which show the following contents:

[0016] Figure 1 It is a cross-sectional view of the floating two-way lock of the utility model;

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

[0018] Figure 3 This is a functional diagram of the floating two-way lock of the utility model;

[0019] Marked in the figure are: 1. second valve sleeve; 2. second spring; 3. valve core; 4. valve seat; 5. first spring; 6. push rod; 7. first valve sleeve; 8. valve body; 9. first liquid hole; 10. second liquid hole; 11. third liquid hole. DETAILED DESCRIPTION

[0020] The specific embodiments of the present application will be further described in detail below with the accompanying drawings, and the purpose is to help the technical personnel in the art have a more complete, accurate and in-depth understanding of the concept and technical scheme of the present application, and to help its implementation.

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

[0022] As Figures 1 to 3 shown, the utility model provides a kind of floating bidirectional lock, including valve body 8 and the valve core assembly being arranged in valve body 8, valve core assembly includes first valve sleeve 7, second valve sleeve 1, valve core 3, top rod 6, first spring 5 and second spring 2, second spring 2 is rectangular spring, which exerts elastic force on top rod 6 and valve core 3.

[0023] As Figure 1 shown, valve body 8 is rectangular block structure, control port PC and two liquid inlet holes PA, PB are provided on valve body 8, two valve core assemblies are coaxially arranged and symmetrically arranged, two liquid inlet holes PA, PB are respectively communicated with two valve core assemblies located in valve cavity, control port PC is located between two liquid inlet holes PA, PB, and control port is communicated with valve cavity.

[0024] First working port A1, second working port A2, third working port B1 and fourth working port B2 are provided on valve body 8, which are liquid outlet holes, first communication hole and second communication hole are provided inside valve body 8, first communication hole is communicated with first working port A1 and second working port A2, second communication hole is communicated with third working port B1 and fourth working port B2, and first communication hole and second communication hole are respectively communicated with two valve core assemblies.

[0025] Control port PC and two liquid inlet holes PA, PB are arranged on the first surface of valve body 8, first working port A1 and third working port B1 are arranged on the second surface of valve body 8, second working port A2 and fourth working port B2 are arranged on the third surface of valve body 8, the first surface and the third surface are opposite end faces of valve body 8, the first surface and the third surface are parallel and parallel to the axis of valve core assembly, and the second surface is located between the first surface and the third surface and perpendicular to the first surface and the third surface. The oil entering the valve cavity from the control port PC pushes the valve rod of the two valve core assemblies to move linearly along the axial direction, so that the valve rod pushes the valve core 3 to move, and the opening of the bidirectional lock is realized.

[0026] AsFigure 1 As shown in the drawings, the spool assembly is arranged in the valve cavity of the valve body 8, which extends from one end face of the valve body 8 to the other end face of the valve body 8. The spool assembly includes a first valve sleeve 7, a second valve sleeve 1, a valve seat 4, a movably arranged spool 3, and a top rod 6 movably arranged in the first valve sleeve 7 and used to push the spool 3, and the first valve sleeve 7 is provided with a third liquid passage 11, wherein the third liquid passage 11 on the first valve sleeve 7 of one spool assembly is in communication with the inlet hole PA, and the third liquid passage 11 on the first valve sleeve 7 of the other spool assembly is in communication with the inlet hole PB. The second valve sleeve 1 is provided with a second liquid passage 10, wherein the second liquid passage 10 on the second valve sleeve 1 of one spool assembly is in communication with the first communication hole, and the second liquid passage 10 on the second valve sleeve 1 of the other spool assembly is in communication with the second communication hole. The spool 3 is provided with a first liquid passage 9, and the first liquid passage 9 is provided in plurality, and the first liquid passage 9 is in communication with the inner cavity of the spool 3 and the inner cavity of the second valve sleeve 1.

[0027] As shown in the drawings, Figure 1 and Figure 2 The second valve sleeve 1 is inserted into the valve cavity of the valve body 8 and is threadedly connected with the valve body 8, the first valve sleeve 7 is located in the valve cavity of the valve body 8, the ends of the top rods 6 of the two spool assemblies are in contact when the bidirectional lock is in the closed state, the first valve sleeve 7 is provided with an unloading cavity, the head of the top rod 6 extends into the unloading cavity of the first valve sleeve 7, and the tail of the top rod 6 is located inside the first valve sleeve 7. The spool 3 is built in the second valve sleeve 1, the valve seat 4 is fixedly arranged between the first valve sleeve 7 and the second valve sleeve 1, the head of the spool 3 is in sealing connection with the valve seat 4, and a second spring 2 is further arranged between the spool 3 and the second valve sleeve 1, the second spring 2 pushes the spool 3 to slide in the spool 3, so that the head of the spool 3 can be in contact with the top rod 6. One end of the second spring 2 is inserted into the inner cavity of the spool 3, and the other end of the second spring 2 is embedded in the positioning groove arranged on the inner wall surface of the second valve sleeve 1, so as to realize the guidance and positioning of the second spring 2. The second spring 2 adopts a rectangular spring, which has greater rigidity than a spiral compression spring under the same space condition, has small volume, can reduce the occupied space, and can ensure the timely closing of the bidirectional lock and improve the working reliability.

[0028] As shown in the drawings, Figure 2As shown, the top rod 6 is pushed by the emulsion entering the valve body 8 from the working port, and moves towards the valve core 3, first contacts the valve core 3, 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 first valve sleeve 7 is communicated with the inner cavity of the second valve sleeve 1. The head of the top rod 6 is provided with external threads, the position adjacent to the unloading cavity of the inner part of the first valve sleeve 7 is provided with a limiting block, the limiting block is provided with a through hole, the inner wall of the through hole is provided with internal threads matched with the external threads on the top rod 6, and the 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. The first valve sleeve 7 and the top rod 6 are threadedly connected, the top rod 6 can be screwed into the unloading cavity in the first valve sleeve 7, a plug-in valve core assembly is formed, the system integration of the entire hydraulic control check valve is high, the installation and maintenance of the hydraulic control check valve are facilitated, that is, the installation is simple, the maintenance is convenient, and the hydraulic control check valve can be repaired by directly replacing the plug-in valve core assembly.

[0029] As shown in the figure, Figure 2 The head of the valve core 3 is a conical frustum structure, and the head of the valve core 3 no longer extends into the unloading cavity of the first valve sleeve 7, and the top rod 6 only contacts the valve core 3 at the center 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 core 3 and the valve seat 4 are made of Cr stainless steel, compared with soft sealing, hard sealing not only has good sealing performance, but also can resist super high pressure, and can prolong the service life of the hydraulic control check valve.

[0030] The above is an exemplary description of the present application combined with the drawings. Obviously, the specific implementation of the present application is not limited by the above method. As long as various non-essential improvements are made by adopting the method concept and technical scheme of the present application, or the above concept and technical scheme of the present application is directly applied to other occasions without improvement, they are all within the protection scope of the present application.

Claims

1. A floating bidirectional lock comprising a valve body and a spool assembly disposed within the valve body, the spool assembly comprising a first valve sleeve, a second valve sleeve, a spool, a top rod, a first spring exerting an elastic force on the top rod, and a second spring exerting an elastic force on the spool, characterized in that: The second spring is a rectangular spring, and the second spring is clamped between the valve core and the second valve sleeve; the valve core assembly is arranged in a valve cavity of the valve body, the valve cavity extends from one end face of the valve body to the other end face of the valve body; the first valve sleeve is provided with a third liquid passage, and the second valve sleeve is provided with a second liquid passage, the second liquid passage on the second valve sleeve of one valve core assembly is communicated with the first communication hole, and the second liquid passage on the second valve sleeve of the other valve core assembly is communicated with the second communication hole; the valve core is provided with a first liquid passage, the first liquid passage is provided with a plurality of first liquid passages, and the first liquid passage is communicated with the inner cavity of the valve core and the inner cavity of the second valve sleeve; The second valve sleeve is inserted into the valve cavity of the valve body and is screwed with the valve body, the first valve sleeve is arranged in the valve cavity of the valve body, the top rod ends of the two valve core assemblies are in contact when the bidirectional lock is in the closed state, the first valve sleeve is provided with an unloading cavity, the head of the top rod is inserted into the unloading cavity of the first valve sleeve, and the tail of the top rod is arranged in the first valve sleeve; The valve core is arranged in the second valve sleeve, the valve seat is fixedly arranged between the first valve sleeve and the second valve sleeve, the head of the valve core is in sealing connection with the valve seat, the second spring is further arranged between the valve core and the second valve sleeve, the second spring pushes the valve core to slide in the valve core, and the head of the valve core can be in contact with the top rod; One end of the second spring is inserted into the inner cavity of the valve core, and the other end of the second spring is embedded in the positioning groove arranged on the inner wall surface of the second valve sleeve; The valve core and the valve seat are in hard sealing connection, the head of the valve core is in conical structure, and the head of the valve core does not extend into the unloading cavity of the first valve sleeve any more, and the top rod and the valve core are only in contact with the center hole of the valve seat; The valve body is provided with a first working port A1, a second working port A2, a third working port B1 and a fourth working port B2, the valve body is provided with a first communication hole and a second communication hole, the first communication hole is communicated with the first working port A1 and the second working port A2, the second communication hole is communicated with the third working port B1 and the fourth working port B2, and the first communication hole and the second communication hole are respectively communicated with the two valve core assemblies.

2. The floating bidirectional lock of claim 1, wherein: The first spring is a cylindrical helical spring.

Images