CN203347811U - Plug-in large flow balance two-way lock - Google Patents

Abstract

The utility model discloses a large-traffic balanced two-way lock of cartridge formula, which comprises a valve body, two valve barrel and two sets of hydraulic assembly, hydraulic assembly includes the case, disk seat and ejector pin, be equipped with the cavity body on the disk seat, the head of ejector pin stretches into the cavity body of disk seat, the afterbody of ejector pin is located outside the disk seat, the head of case on the disk seat with the port department and the disk seat sealing connection of cavity body intercommunication, it has return spring still to overlap on the ejector pin, be equipped with the external screw thread on the head pole body of ejector pin, the position that is close to the cavity body in the inside of disk seat is equipped with the stopper, be equipped with the through-hole on this stopper, be equipped with the internal thread. The valve seat and the ejector rod are in threaded connection, the ejector rod can be screwed into a cavity body in the valve seat to form a plug-in type hydraulic assembly, so that the system integration degree of the whole large-flow balanced bidirectional lock is high, the installation and the maintenance are convenient, and the plug-in type hydraulic assembly can be directly repaired by replacing the plug-in type hydraulic assembly.

Description

Plug-in large flow balance two-way lock

technical field

The utility model relates to a hydraulic component in a hydraulic circuit of a coal mine hydraulic support, in particular to a plug-in type large-flow balanced two-way lock.

Background technique

The high-flow balance two-way lock is mainly used in coal mine hydraulic supports, and together with the operating valve group, it controls the balance of the hydraulic support and helps the jack work. When the operating valve group is in the neutral position and the structure of the external force 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 external force.

As coal mine requirements are becoming more and more integrated and automated, the currently used high-flow two-way lock has a complex structure, many types of parts inside the valve body, difficult disassembly and maintenance, and is extremely inconvenient to maintain, especially in coal mines. space constraints.

Therefore, the current large-flow balanced two-way lock can no longer meet the needs of coal mine users.

Utility model content

The technical problem to be solved by the utility model is to provide a plug-in large-flow balanced two-way lock with simple installation and convenient maintenance.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a plug-in type large flow balance two-way lock, including a valve body, two valve sleeves and two sets of hydraulic components, and the two sets of hydraulic components are respectively arranged on the valve body In the two valve chambers, the two valve sleeves matching the hydraulic components are arranged on the same side of the valve body, the head of the valve sleeve is sealed, and the other side of the valve body is provided with a liquid inlet and a liquid outlet. The assembly includes a valve core, a valve seat and a ejector rod. There is a cavity on the valve seat. The head of the ejector rod extends into the cavity of the valve seat. The tail of the ejector rod is located outside the valve seat. The port on the seat that communicates with the cavity body is sealed and connected with the valve seat, and a return spring is set on the ejector rod. There is a limit block, a through hole is set on the limit block, and an internal thread matching the external thread on the push rod is provided on the inner wall of the through hole, and one end of the return spring is against the limit block , and the other end against the tail of the mandrel.

There is a hard seal connection between the valve core and the valve seat.

The head of the valve core is a truncated cone structure, and the ejector rod and the valve core start to contact at the port of the valve seat.

The valve sleeve is threadedly connected with the valve body.

The utility model adopts the above-mentioned technical scheme. Compared with the prior art, the valve seat and the ejector rod are threaded, and the ejector rod can be screwed into the cavity in the valve seat to form a plug-in hydraulic component, so that the entire large flow The system integration of the balanced two-way lock is high, which is convenient for installation and maintenance, and can be repaired directly by replacing the plug-in hydraulic components.

Description of drawings

Fig. 1 is the cross-sectional view of the large flow balance two-way lock of the present utility model;

Fig. 2 is the side view of Fig. 1;

Fig. 3 is a sectional view of the hydraulic assembly;

The marks in the above figures are: 1. valve sleeve; 2. hydraulic component; 21. valve core; 22. valve seat; 23. return spring; 24. ejector rod; 25. hollow body; 26. port; 27. , Limiting block; 3, Valve body; 4, Liquid inlet; 5, Liquid outlet; 6, Screw plug.

Detailed ways

As shown in Figure 1 and Figure 2, it is a plug-in type large flow balance two-way lock of the present utility model, which includes a valve body 3, two valve sleeves 1 and two sets of hydraulic components 2, and the two sets of hydraulic components 2 are respectively arranged on the valve Among the two valve cavities of the body 3, the two valve cavities communicate in the valve body 3. The two valve sleeves 1 matched with the hydraulic assembly 2 are arranged on the same side of the valve body 3, the head of the valve sleeve 1 outside the valve body 3 is sealed, the valve sleeve 1 and the valve body 3 are threaded, inserted into the valve Body 3. The other side of the valve body 3 is provided with a liquid inlet 4 and a liquid outlet 5 , the liquid inlet 4 communicates with the upper hydraulic assembly 2 , and the liquid outlet 5 communicates with the lower hydraulic assembly 2 . Two screw plugs 6 are respectively arranged on the top and the bottom of the valve body 3 , the screw plugs 6 are used to block the oil passages at the top and bottom of the valve body 3 , and the screw plugs 6 are threadedly connected with the valve body 3 . As shown in Figures 1 and 3, the hydraulic assembly 2 includes a valve core 21, a valve seat 22 and a push rod 24, one end of the valve seat 22 is inserted into the valve sleeve 1, and the other end is set against the inner wall of the valve cavity of the valve body 3 On the limiting step, the valve seat 22 is provided with a cavity body 25, the head of the ejector rod 24 extends into the cavity body 25 of the valve seat 22, the tail of the ejector rod 24 is located outside the valve seat 22, and the valve core 21 is located at In the groove inside the valve sleeve 1, a valve core spring is provided between the valve core 21 and the inner wall of the valve sleeve 1. Under the pushing action of the valve core spring, the head of the valve core 21 is aligned with the hollow space on the valve seat 22. The port 26 where the cavity 25 communicates is in sealing connection with the valve seat 22 , and a return spring 23 is sheathed on the push rod 24 . In order to solve the problems existing in the prior art, the head of the push rod 24 of the hydraulic assembly 2 is provided with an external thread, and a limit block 27 is provided inside the valve seat 22 near the cavity body 25, and the limit block 27 A through hole is provided on the inner wall of the through hole, and an internal thread matching the external thread on the push rod 24 is provided on the inner wall of the through hole. on the tail. Compared with the prior art, the valve seat 22 and the ejector rod 24 are threaded, and the ejector rod 24 can be screwed into the cavity body 25 in the valve seat 22 to form a plug-in hydraulic assembly 2, so that the entire large flow The balanced two-way lock system has a high degree of integration, is easy to install and maintain, and can be repaired directly by replacing the plug-in hydraulic component 2 .

The valve core 21 and the valve seat 22 of the large-flow balanced two-way lock are hard-sealed. The valve core 21 is made of metal material to realize the hard seal between the valve body 3 and the valve seat 22. , The hard seal not only has good sealing performance, but also can withstand ultra-high pressure, prolonging the service life of the two-way lock.

As shown in Figures 1 and 3, the head of the valve core 21 is a truncated cone structure. Port 26 starts to contact, the structure of the spool 21 is simpler, and the overall structure of the large flow balance two-way lock is more compact. In addition, the valve core spring and the return spring 23 are made of carbon spring steel wire.

The working principle of the large flow balanced bidirectional lock is the same as that of the prior art large flow balanced bidirectional lock. The size of this balanced two-way lock is 140*125*40mm, the nominal flow rate is 125L/min, and the nominal pressure is 50MPa.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned methods, as long as various insubstantial improvements are made by adopting the method concept and technical solutions of the utility model, or Directly applying the ideas and technical solutions of the utility model to other occasions without improvement is within the protection scope of the utility model.

Claims (4)

1. the large flow equilibrium reversible lock of plug-in, comprise valve body, two valve pockets and two cover hydraulic packages, two cover hydraulic packages are located at respectively in two valve pockets of valve body, two valve pockets are located at the same side of valve body, the head seal of valve pocket, opposite side at valve body is provided with inlet and liquid outlet, hydraulic package comprises spool, valve seat and push rod, valve seat is provided with cavity body, the head of push rod stretches in the cavity body of valve seat, the afterbody of push rod is positioned at outside valve seat, the port that with cavity body be communicated with of the head of spool on valve seat is connected with valve base sealing, on push rod, also cover has return spring, it is characterized in that: the head at described push rod is provided with external screw thread, position in the close cavity body in the inside of described valve seat is provided with limited block, be provided with through hole on this limited block, on the inwall of through hole, be provided with push rod on the suitable internal thread of external screw thread, described return spring one end is against on limited block, the other end is against the afterbody of push rod.

2. the large flow equilibrium reversible lock of plug-in according to claim 1 is characterized in that: between described spool and described valve seat for firmly being tightly connected.

3. the large flow equilibrium reversible lock of plug-in according to claim 1 and 2, it is characterized in that: the head of described spool is the frustum structure, described push rod starts to contact in the port of described valve seat with spool.

4. the large flow equilibrium reversible lock of plug-in according to claim 3 is characterized in that: described valve pocket with described valve body for being threaded.

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