CN205078288U - A spool assembly of a side guard bidirectional lock - Google Patents

Abstract

The utility model discloses a valve core assembly with a side guard and a two-way lock, comprising a first valve core unit and a second valve core unit, a relief cavity is provided on the valve seat of the two valve core units, the head of the push rod extends into the relief cavity of the valve seat, a return spring is sleeved on the push rod, an external thread is provided on the head rod of the push rod, a limit block is provided at a position near the relief cavity inside the valve seat, a through hole is provided on the limit block, an internal thread matching the external thread on the push rod is provided on the inner wall of the through hole, one end of the return spring abuts against the limit block, and the other end abuts against the push rod; the head of the valve core is sealed and connected to a valve pad provided at the port of the valve seat. In the valve core assembly with a side guard and a two-way lock of the utility model, the valve seat and the push rod are threadedly connected to form a plug-in hydraulic assembly, which has a high degree of rigidity and is easy to install and maintain; and a valve pad is provided on the valve seat for sealing with the valve core, and the valve pad is made of engineering plastic, which can improve the sealing performance.

Description

A spool assembly of a side guard bidirectional 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 valve core assembly of a side guard bidirectional lock.

Background technique

The side guard two-way lock is mainly used for the coal mine hydraulic support, and controls the balance of the hydraulic support together with the control valve group, and protects and helps the side guard jack to move. When the operating valve group is in the neutral position and the result of 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.

The traditional two-way lock includes a valve body, a valve core built in the valve body, a valve seat and a ejector rod. There is an unloading cavity on the valve seat, and the ejector rod is set inside the valve seat and its head is inserted into the valve seat. The unloading chamber interacts with the head of the valve core, and there are four ports on the valve body for connecting with other components. This structure has many one-way lock parts, which will lead to more cumbersome assembly, especially Coal mines are limited by space, which will lead to inconvenient maintenance and low service life.

Utility model content

The technical problem to be solved by the utility model is to provide a spool assembly of the side guard one-way lock which is easy to install and easy to maintain, and has good sealing performance.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a spool assembly of the side guard bidirectional lock, including a first spool unit and a second valve core inserted into the valve cavity at one end of the valve body of the side guard bidirectional lock respectively. Core unit, the first valve core unit includes a valve sleeve, the first valve core set in the valve sleeve, the first valve seat and the first push rod, one end of the valve sleeve is inserted into the valve body, and the other end is closed, the second valve core unit It includes a joint thread sleeve, a second valve core, a second valve seat and a second push rod arranged in the joint thread sleeve. One end of the joint thread sleeve is inserted into the valve body, and the other end has an opening. The first valve seat and the second valve seat There is an unloading chamber, the head of the first ejector rod extends into the unloading chamber of the first valve seat, the head of the second ejector rod extends into the unloading chamber of the second valve seat, the first ejector rod There is an external thread on the head shaft of the first valve seat, and a first limit block is provided on the inside of the first valve seat close to the unloading chamber. The first limit block is provided with a first through hole, and the first through hole The inner wall is provided with an internal thread that matches the external thread on the first ejector rod; the head shaft of the second ejector rod is provided with an external thread, and the inside of the second valve seat is close to the position of the unloading chamber A second limit block is provided, a second through hole is provided on the second limit block, and an internal thread matching the external thread on the second push rod is provided on the inner wall of the second through hole; the first valve seat The end of the second valve seat is provided with a first valve pad sealingly connected with the first valve core, the end of the second valve seat is provided with a second valve pad sealingly connected with the second valve core, the first valve pad and the second valve pad The material is engineering plastic.

The material of the first valve pad and the second valve pad is PEEK.

The first valve pad and the second valve pad are both circular structures.

The head of the first valve core is a truncated cone structure, and the first push rod and the first valve core start to contact at the first valve pad.

The head of the second valve core is a frustum of cone structure, and the second push rod and the second valve core start to contact at the second valve pad.

The valve sleeve is threadedly connected with the valve body.

The joint screw sleeve is threadedly connected with the valve body.

The side wall of the first valve seat has a first liquid passage hole communicating with the unloading chamber, and the working port A on the valve body communicates with the unloading chamber through the first liquid passage hole.

The side wall of the second valve seat has a second liquid passage hole communicating with the unloading chamber, and the working port B on the valve body communicates with the unloading chamber through the second liquid passage hole.

The side wall of the second valve seat has a third liquid passage hole communicating with the valve chamber between the second push rod and the second limiting block.

In the spool assembly of the side guard bidirectional lock of the utility model, the valve seat and the ejector rod of each spool unit are threaded, and the ejector rod can be screwed into the unloading cavity in the valve seat to form a plug-in hydraulic assembly. The two-way lock of the side guard can make the system integration of the whole two-way lock higher, which is convenient for installation and maintenance, that is, the installation is simple and the maintenance is convenient. The two-way lock of the side guard can be repaired directly by replacing the plug-in hydraulic components; A valve gasket is arranged on the seat for sealing with the valve core, and the valve gasket is made of engineering plastics, which can improve the sealing performance.

Description of drawings

This manual includes the following drawings, the contents shown are:

Fig. 1 is a sectional view of the side guard bidirectional lock;

Fig. 2 is a sectional view of the first spool unit;

Fig. 3 is a sectional view of the second spool unit;

Labeled in the figure:

1. Valve sleeve; 2. The first valve core; 3. The first valve seat; 4. The first ejector rod; 5. Joint screw sleeve; 6. The second valve core; 7. The second valve seat; 8. The second Push rod; 9, valve body; 10, first spring; 11, second spring; 12, first unloading cavity; 13, second unloading cavity; 14, first limit block; 15, second limit 16, the first valve pad; 17, the second valve pad; 18, the first liquid hole; 19, the second liquid hole; 20, the third liquid hole; 21, the first through hole; 22, the first Two through holes; 23, the fourth liquid passage hole; 24, the fifth liquid passage hole.

detailed description

Next, with reference to the accompanying drawings, through the description of the embodiments, the specific implementation of the present utility model will be further described in detail, the purpose is to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present utility model , and contribute to its implementation.

As shown in Figure 1, for the side guard bidirectional lock adopting the spool assembly of the present utility model, the side guard bidirectional lock includes a valve body, and the spool assembly includes a first valve body inserted into the valve cavity of the valve body 9 at one end of the valve body 9 respectively. A spool unit and a second spool unit, the first spool unit and the second spool unit are set oppositely. The first valve core unit includes a valve sleeve 1, a first valve core 2 set in the valve sleeve 1, a first valve seat 3 and a first push rod 4, and one end of the valve sleeve 1 is inserted into the valve body 9 and fixed with the valve body 9 The other end is closed, that is, the valve sleeve 1 of the first valve core unit seals the opening of the valve cavity on the side of the valve body 9 . The first valve core 2 is located inside the valve sleeve 1 , and the valve sleeve 1 is provided with a spring for applying elastic force to the first valve core 2 . The second spool unit includes a joint screw sleeve 5, a second valve core 6, a second valve seat 7 and a second push rod 8 arranged in the joint screw sleeve 5, and one end of the joint screw sleeve 5 is inserted into the valve body 9 to be connected with the valve body. The body 9 is fixedly connected, and the other end protrudes from the outside of the valve body 9 and this end has an opening. Working port C connected with external joint. The second valve core 6 is located inside the joint threaded sleeve 5 , and a spring for applying elastic force to the second valve core 6 is provided in the joint threaded sleeve 5 . The first valve seat 3 and the second valve seat 7 are inserted into the valve cavity of the valve body 9, the first push rod 4 and the second push rod 8 all have a cylindrical guide part directly contacting the inner wall of the valve body 9, and the first The guide parts of the push rod 4 and the second push rod 8 are arranged adjacently and both have equal diameters. The first valve seat 3 and the second valve seat 7 are respectively provided with a first unloading chamber 12 and a second unloading chamber 13, and the head of the first push rod 4 extends into the first unloading chamber of the first valve seat 3 12, the head of the second push rod 8 extends into the second unloading chamber 13 of the second valve seat 7. The head shaft of the first push rod 4 is provided with an external thread, and the inside of the first valve seat 3 is provided with a first stopper 14 near the unloading cavity, and the first stopper 14 is provided with a first through hole 21. The inner wall of the first through hole 21 is provided with an internal thread that matches the external thread on the first push rod 4. One end of the first spring 10 abuts against the first stopper 14, and the other end abuts against the first stopper 14. On the push rod 4; the head shaft of the second push rod 8 is provided with external threads, and the inside of the second valve seat 7 is provided with a second limit block 15 near the position of the unloading cavity, and the second limit block 15 is provided with a There is a second through hole 22, the inner wall of the second through hole 22 is provided with an internal thread suitable for the external thread on the second push rod 8, one end of the second spring 11 is against the second stopper 15, and the other One end is against the second push rod 8. Compared with the existing technology, the valve seat and the ejector rod of the two valve core assemblies are all threaded, and the ejector rod can be screwed into the unloading chamber in the valve seat to form a plug-in hydraulic assembly, so that the entire protection side is bidirectional The system integration of the lock is high, which is convenient for installation and maintenance, and can be repaired directly by replacing the plug-in hydraulic components.

As shown in Figure 2, the end of the first valve seat 3 is provided with a first valve pad 16 that is sealed to the first valve core 2, and the center of the end of the first valve seat 3 has a valve that communicates with the first unloading chamber 12. The opening is stepped, and the first valve pad 16 is embedded in the large-diameter hole of the opening, and the first valve pad 16 is made of engineering plastics. Preferably, the material of the first valve pad 16 is polyetheretherketone (PEEK). The first valve pad 16 made of this material can improve the sealing performance between the first valve core 2 and the first valve core 2 .

As shown in FIG. 3 , the end of the second valve seat 7 is provided with a second valve pad 17 that is sealingly connected with the second valve core 6 . The opening is stepped, and the second valve pad 17 is embedded in the large-diameter hole of the opening, and the second valve pad 17 is made of engineering plastics. Preferably, the material of the second valve pad 17 is polyetheretherketone (PEEK), and the second valve pad made of this material can improve the sealing performance with the second valve core 6 .

As shown in FIG. 2 and FIG. 3 , the first valve pad 16 and the second valve pad 17 have the same structure, are circular in shape, and have a rectangular cross section. The first valve pad 16 is coaxial with the first valve seat 3 , and the diameter of the central hole of the first valve pad 16 is equal to the diameter of the small diameter hole of the port of the first valve seat 3 . The second valve pad 17 is coaxial with the second valve seat 7 , and the diameter of the central hole of the second valve pad 17 is equal to the diameter of the small diameter hole of the port of the second valve seat 7 .

As shown in Figure 2, the head of the first valve core 2 is a truncated cone structure, and the first push rod 4 and the first valve core 2 start to contact at the first valve pad 16, so that the head of the first valve core 2 does not Then extend into the first unloading chamber 12, the first push rod 4 and the first valve core 2 only start to contact at the port of the first valve seat 3, the structure of the first valve core 2 is simpler, and the two-way lock of the protection side is integral. The structure is more compact. Under the pushing action of the inner spring of the valve sleeve 1 , the head of the first valve core 2 is in sealing connection with the first valve pad 16 .

As shown in Figure 3, the head of the second spool 6 is a truncated cone structure, and the second push rod 8 and the second spool 6 start to contact the second valve pad, so that the head of the second spool 6 no longer Extending into the second unloading chamber 13, the second ejector rod 8 and the second valve core 6 only start to contact at the port of the second valve seat 7, the structure of the second valve core 6 is simpler, and the overall protection of the two-way lock The structure is more compact. Under the pushing action of the inner spring of the valve sleeve 1 , the head of the second valve core 6 is in sealing connection with the second valve pad 17 .

As shown in Fig. 2 and Fig. 3, the valve sleeve 1 is threadedly connected with the valve body 9, and one end of the first valve seat 3 is inserted into the valve sleeve 1 and is threadedly connected with it. A sealing ring, a sealing ring is arranged between the valve sleeve 1 and the valve body 9 . A seal ring is provided between the guide portion of the first push rod 4 and the valve body 9 , and the seal ring is sheathed on the guide portion of the first push rod 4 . The joint threaded sleeve 5 is threadedly connected with the valve body 9, and one end of the second valve seat 7 is inserted into the jointed threaded sleeve 5 to be threadedly connected with it. A sealing ring is provided between 5 and valve body 9. These sealing rings are all made of rubber material, which can improve the sealing performance.

As shown in Figure 1, there are five working ports on the two-way lock of the side guard, which are respectively working port PA, working port PB, working port A, working port B and working port C, and the working port C is arranged on the joint screw sleeve 5. Working port PA and working port PB are located on the same side of valve body 9, working port A and working port B are located on the same side of valve body 9, and working port A and working port B, working port PA and working port PB are located on valve body 9 opposite sides. As shown in Figure 2, the side wall of the first valve seat 3 of the first valve core unit has a first fluid hole 18 communicating with the first unloading chamber 12, and the working port A is connected to the first fluid hole 18 through the first fluid hole 18. An unloading chamber 12 is connected; the side wall of the valve sleeve 1 has a fourth fluid hole 23 communicating with the inner cavity of the valve sleeve 1, and the working port PA communicates with the inner cavity of the valve sleeve 1 through the fourth fluid hole 23. When the first valve core 2 is open, the inner chamber of the valve sleeve 1 communicates with the first unloading chamber 12 .

As shown in Figure 3, the second valve seat 7 of the second spool unit has a second fluid hole 19 communicating with the second unloading chamber 13 on the side wall, and the working port B is connected to the second fluid hole 19 through the second fluid hole 19. The second unloading chamber 13 is connected; the side wall of the joint screw sleeve 5 has a fifth fluid hole 24 communicating with the inner cavity of the joint screw sleeve 5, and the working port PB is connected to the inner cavity of the joint screw sleeve 5 through the fifth fluid hole 24 When the second valve core 6 is in the open state, the inner cavity of the joint screw sleeve 5 communicates with the second unloading chamber 13 . The side wall of the second valve seat 7 also has a third liquid passage hole 20 communicating with the valve chamber part between the second push rod 8 and the second limit block 15, the second liquid passage hole 19 and the third liquid passage hole. One end opening of the hole 20 communicates with the working port B, and the other end openings of the second liquid passage hole 19 and the third liquid passage hole 20 are respectively located on both sides of the second limiting block 15 .

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Apparently, the specific implementation of the present invention is not limited by the above methods. As long as the various insubstantial improvements made by adopting the method concept and technical solution of the present utility model; within the scope of protection.

Claims (10)

1. A spool assembly of a side bidirectional lock, comprising a first spool unit and a second spool unit inserted into the valve chamber at one end of the valve body of the side bidirectional lock respectively, the first spool unit comprising a valve sleeve, The first valve core, the first valve seat and the first ejector rod are arranged in the valve sleeve. One end of the valve sleeve is inserted into the valve body, and the other end is closed. The second valve core, the second valve seat and the second push rod, one end of the joint thread sleeve is inserted into the valve body, and the other end has an opening, the first valve seat and the second valve seat are provided with unloading chambers, the head of the first push rod The part extends into the unloading chamber of the first valve seat, and the head of the second ejector rod extends into the unloading chamber of the second valve seat. It is characterized in that: the head shaft of the first ejector rod is provided with an outer screw thread, the inside of the first valve seat is provided with a first limit block near the unloading chamber, the first limit block is provided with a first through hole, and the inner wall of the first through hole is provided with the first top The external thread on the rod is matched with the internal thread; the head shaft of the second ejector rod is provided with external thread, and the inside of the second valve seat is provided with a second limit block at a position close to the unloading cavity, The second limiting block is provided with a second through hole, and the inner wall of the second through hole is provided with an internal thread that is compatible with the external thread on the second push rod; the end of the first valve seat is provided with the first The valve core is sealingly connected with the first valve pad, and the end of the second valve seat is provided with the second valve pad sealingly connected with the second valve core, and the material of the first valve pad and the second valve pad is engineering plastics. 2. The valve core assembly of the side guard bidirectional lock according to claim 1, wherein the material of the first valve pad and the second valve pad is PEEK. 3. The valve core assembly of the side guard bidirectional lock according to claim 1 or 2, characterized in that: the first valve pad and the second valve pad are both circular structures. 4. The spool assembly of the side guard two-way lock according to claim 1, characterized in that: the head of the first spool is a truncated cone structure, and the first push rod and the first spool are in the Contact begins at the first valve pad. 5. The spool assembly of the side guard two-way lock according to claim 1, characterized in that: the head of the second spool is a truncated cone structure, and the second ejector rod and the second spool are in the Contact begins at the second pad. 6 . The spool assembly of the side guard bidirectional lock according to claim 1 , wherein the valve sleeve and the valve body are threadedly connected. 6 . 7. The spool assembly of the side guard two-way lock according to claim 1, wherein the joint threaded sleeve is threadedly connected to the valve body. 8. The valve core assembly of the side guard bidirectional lock according to claim 1, characterized in that: the side wall of the first valve seat has a first liquid passage hole communicating with the unloading chamber, and the valve body has The working port A communicates with the unloading chamber through the first liquid hole. 9. The spool assembly of the side guard bidirectional lock according to claim 1, characterized in that: the side wall of the second valve seat has a second liquid passage hole communicating with the unloading cavity, and the valve body has a The working port B communicates with the unloading chamber through the second liquid hole. 10. The spool assembly of the side guard two-way lock according to claim 9, characterized in that: the side wall of the second valve seat has a valve cavity communicating with the second push rod and the second limit block. The third liquid hole.