A plug-in valve cover plate device

Abstract

The invention provides a cartridge valve cover plate device, comprising a cover plate body, a threaded cartridge hydraulic reversing valve, an external control oil circuit and an internal control oil circuit; the cover plate body is provided with a threaded cartridge hydraulic reversing valve, and the cover plate body is provided with an internal control oil circuit; the external control oil circuit comprises an X pilot control oil circuit; the internal control oil circuit comprises a first channel, a Z1 pilot control oil circuit, a Z2 valve core locking oil circuit and a Y oil drain port oil circuit. When the pilot control oil is fed back to the a port of the threaded cartridge hydraulic reversing valve through the X port of the valve body bottom plate and the Z1 pilot control oil circuit, the valve core of the threaded cartridge hydraulic reversing valve is in the left position. At this time, port Ⅰ is connected to port Ⅲ, and port AB of the main oil circuit is connected. When the pilot control oil is not given, the threaded cartridge hydraulic reversing valve returns to its original position, presses the main valve core of the main oil circuit onto the valve seat, and cuts off port AB of the main oil circuit, thereby achieving the pressure maintenance effect and effectively reducing the damage rate of the hydraulically controlled one-way valve. The device has the characteristics of impact resistance, small leakage, effective pressure maintenance and long service life.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic equipment, and in particular relates to a cartridge valve cover plate device with a reliable pressure-maintaining function. Background Art

[0002] The hydraulically controlled one-way valve of the cooling bed hydraulic station ensures that the oil circuit is open when the cooling bed rises. After the cooling bed rises to the upper limit, the hydraulically controlled one-way valve return oil circuit is closed, which maintains the pressure of the oil cylinder and prevents the cooling bed from falling.

[0003] At present, the hydraulic control one-way valve core of the cooling bed hydraulic station is a built-in valve block type, which does not have strong impact resistance. Due to the harsh on-site use environment, this hydraulic control one-way valve often fails to realize the cylinder pressure-maintaining function due to the damage of the valve core spring and valve core during use, causing the cooling bed to automatically drop when it rises to the upper limit, resulting in the bending and deformation of the steel billet after hanging on the teeth. This not only causes great damage to the cooling bed equipment, but also has a serious impact on the quality of the steel billet. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a cartridge valve cover plate device. When the pilot control oil is not given, the threaded cartridge hydraulic reversing valve returns to its original position, pressing the main valve core of the main oil circuit onto the valve seat to cut off the AB port of the main oil circuit, thereby achieving a pressure-maintaining effect, allowing the heavy object to continue to remain in the same position, effectively reducing the damage rate of the hydraulically controlled one-way valve. The device is impact-resistant, has low leakage, effectively maintains pressure, and has a long service life.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a cartridge valve cover plate device, including a cover plate body, a threaded cartridge hydraulic reversing valve, an external control oil circuit and an internal control oil circuit;

[0006] The cover body is provided with a threaded plug-in hydraulic reversing valve, and an internal control oil circuit is provided inside the cover body; a through hole is provided at the bottom of the cover body for connecting with the C cavity of the valve body bottom plate;

[0007] The external control oil circuit includes an X pilot control oil circuit;

[0008] The internal control oil circuit includes the first channel, the Z1 pilot control oil circuit, the Z2 valve core locking oil circuit and the Y oil drain port oil circuit;

[0009] The first channel is used to connect the No. Ⅰ port of the threaded plug-in hydraulic reversing valve with the C cavity of the valve body bottom plate;

[0010] One end of the X pilot control oil circuit is connected to the a port of the threaded cartridge hydraulic reversing valve, and the other end of the X pilot control oil circuit is connected to the Z1 pilot control oil circuit, and the Z1 pilot control oil circuit is used to connect to the X port of the valve body bottom plate;

[0011] The Y oil drain port oil circuit is used to connect the valve body bottom plate oil drain port Y with the No. III port of the threaded cartridge hydraulic reversing valve; the Z2 valve core locking oil circuit is used to connect the valve body bottom plate external feedback port Z2 with the No. II port of the threaded cartridge hydraulic reversing valve;

[0012] When the pilot control oil is fed back to the a port of the threaded cartridge hydraulic reversing valve through the X port of the valve body bottom plate and the Z1 pilot control oil circuit, the valve core of the threaded cartridge hydraulic reversing valve is in the left position, at which time the No. Ⅰ port is connected to the No. Ⅲ port, and the main oil circuit AB port is connected;

[0013] When the pilot control oil is not given, the threaded cartridge hydraulic reversing valve returns to its original position, and port Ⅰ is connected to port Ⅱ. At this time, the external feedback pressure acts on the top of the main valve core through the feedback port Z2, the Z2 valve core locking oil circuit, port Ⅱ, and port Ⅰ, pressing the main valve core of the main oil circuit onto the valve seat to cut off the AB port of the main oil circuit.

[0014] In the above solution, the Z1 pilot control oil circuit includes a sixth channel, a seventh channel and an eighth channel 19 which are connected in sequence.

[0015] In the above solution, the Z2 valve core locking oil circuit includes a fourth channel and a fifth channel that are connected.

[0016] In the above solution, the Y oil drain port oil circuit includes a second channel and a third channel that are connected.

[0017] In the above scheme, the threaded cartridge hydraulic directional control valve is a two-position three-way hydraulically controlled directional control valve.

[0018] In the above scheme, the X pilot control oil circuit is a seamless precision tube.

[0019] Furthermore, one end of the seamless precision tube is connected to the other end of the threaded plug-in hydraulic reversing valve through an articulated ferrule joint, and the other end of the seamless precision tube is connected to one end of the Z1 pilot control oil circuit through a ferrule straight-through pipe joint.

[0020] In the above solution, a sealing device is provided at the connection between the cover plate body and the C cavity of the valve body bottom plate.

[0021] In the above solution, the sealing device includes an O-ring and a retaining ring.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: the cartridge valve cover plate device of the present invention, when the pilot control oil is not given, the threaded cartridge hydraulic reversing valve returns to its original position, pressing the main valve core of the main oil circuit onto the valve seat to cut off the AB port of the main oil circuit, thereby achieving a pressure-maintaining effect, allowing the heavy object to remain in the same position continuously, effectively reducing the damage rate of the hydraulically controlled one-way valve, alleviating the labor intensity of on-site operators to a certain extent, greatly improving the safety and continuity of operations, and ensuring safe production, and is significantly superior to the original product in terms of pressure retention, impact resistance, and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 It is a three-dimensional modeling of a two-way cartridge valve cover plate according to one embodiment of the present invention;

[0025] Figure 2 It is a schematic diagram of the appearance of a two-way cartridge valve cover plate according to one embodiment of the present invention;

[0026] Figure 3 It is a schematic diagram of a two-way cartridge valve cover plate body according to one embodiment of the present invention;

[0027] Figure 4 It is a working principle diagram of a two-way cartridge valve cover plate according to one embodiment of the present invention.

[0028] In the figure, 1. threaded plug-in hydraulic reversing valve; 2. articulated ferrule joint; 3. X pilot control oil circuit; 4. ferrule straight-through pipe joint; 5. first channel; 6. O-ring; 7. retaining ring; 8. cover plate body; 9. second channel; 10. third channel; 11. Z1 pilot control oil circuit; 12. Z2 valve core locking oil circuit; 13. Y drain port oil circuit; 14. C cavity of valve body bottom plate; 15. fourth channel; 16. fifth channel; 17. sixth channel; 18. seventh channel; 19. eighth channel; 20, first through-hole; 21, second through-hole; 22, plug. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] like Figure 1 , 2 , 3 and 4 are a preferred embodiment of the two-way cartridge valve cover plate device of the present invention, wherein the two-way cartridge valve cover plate device comprises a cover plate body 8, a threaded cartridge hydraulic reversing valve 1, an external control oil circuit and an internal control oil circuit;

[0033] The cover body 8 is provided with a first through-hole 20 and a second through-hole 21, and an internal control oil circuit is provided inside the cover body 8; the bottom of the threaded plug-in hydraulic reversing valve 1 is inserted into the first through-hole 20 and connected to the internal control oil circuit; a through hole is provided at the bottom of the cover body 8 for connecting with the valve body bottom plate C cavity 14, and a sealing device is provided at the connection;

[0034] The external control oil circuit includes an X pilot control oil circuit 3;

[0035] The internal control oil circuit includes a first channel 5, a Z1 pilot control oil circuit 11, a Z2 valve core locking oil circuit 12 and a Y oil drain port oil circuit 13;

[0036] The first channel 5 is used to connect the No. Ⅰ port of the threaded plug-in hydraulic reversing valve 1 with the C cavity 14 of the valve body bottom plate;

[0037] The Z1 pilot control oil circuit 11 includes a sixth hole 17, a seventh hole 18 and an eighth hole 19 which are connected in sequence;

[0038] The Z2 valve core locking oil passage 12 includes a fourth hole 15 and a fifth hole 16 that are connected;

[0039] The Y oil drain port oil passage 13 includes a second hole 9 and a third hole 10 that are connected;

[0040] One end of the X pilot control oil circuit 3 is connected to the a port of the threaded cartridge hydraulic reversing valve 1, and the other end of the X pilot control oil circuit 3 is connected to the Z1 pilot control oil circuit 11 formed by the sixth hole 17, the seventh hole 18 and the eighth hole 19 through the second through hole 10, and the Z1 pilot control oil circuit 11 is used to connect to the X port of the valve body bottom plate;

[0041] The Y drain port oil circuit 13 formed by the second hole 9 and the third hole 10 is used to connect the valve body bottom plate drain port Y with the No. III port of the threaded cartridge hydraulic reversing valve 1; the Z2 valve core locking oil circuit 12 formed by the fourth hole 15 and the fifth hole 16 is used to connect the valve body bottom plate external feedback port Z2 with the No. II port of the threaded cartridge hydraulic reversing valve 1;

[0042] Port No. Ⅰ of the threaded cartridge hydraulic reversing valve 1 is connected to the main oil circuit;

[0043] Port II of the threaded plug-in hydraulic reversing valve 1 is connected to the Z2 valve core locking oil circuit 12;

[0044] The III port of the threaded plug-in hydraulic reversing valve 1 is connected to the Y oil drain port oil circuit 13 .

[0045] When the pilot control oil is fed back to the a port of the threaded cartridge hydraulic reversing valve 1 through the X port of the valve body bottom plate and the Z1 pilot control oil circuit 11, the valve core of the threaded cartridge hydraulic reversing valve 1 is in the left position, at which time the No. Ⅰ port is connected to the No. Ⅲ port, the Y drain port oil circuit 13 connected to the No. Ⅲ port is connected to the oil tank, and the AB port of the main oil circuit is connected;

[0046] When the pilot control oil is not given, the threaded cartridge hydraulic reversing valve 1 returns to its original position, and port Ⅰ is connected to port Ⅱ. At this time, the external feedback pressure acts on the top of the main valve core through the feedback port Z2, the fourth channel 15, the fifth channel 16, port Ⅱ, and port Ⅰ, pressing the main valve core of the main oil circuit onto the valve seat to cut off the AB port of the main oil circuit, thereby achieving the pressure maintenance effect and keeping the heavy object in the same position.

[0047] According to this embodiment, preferably, the threaded cartridge hydraulic directional valve 1 is a two-position three-way hydraulically controlled directional valve. If the valve core of the threaded cartridge hydraulic directional valve 1 is damaged, the threaded cartridge hydraulic directional valve 1 can be directly replaced without replacing the cover plate body 8.

[0048] According to this embodiment, preferably, the X pilot control oil circuit 3 is a seamless precision tube.

[0049] According to this embodiment, preferably, one end of the seamless precision tube is connected to the other end of the threaded plug-in hydraulic reversing valve 1 through an articulated ferrule joint 2, and the other end of the seamless precision tube is connected to one end of the Z1 pilot control oil circuit 11 through a ferrule straight-through pipe joint 4.

[0050] According to this embodiment, preferably, a sealing device is provided at the connection between the cover plate body 8 and the valve body bottom plate C cavity 14.

[0051] According to this embodiment, preferably, the sealing device includes an O-ring 6 and a retaining ring 7 .

[0052] The mounting hole of the cover body 8 is provided with a detachable plug 22 .

[0053] The experimental data comparison between the conventional cartridge valve cover plate for maintaining pressure and the cartridge valve cover plate device of the present invention is shown in Table 1:

[0054] Table 1 Comparison of experimental data between conventional cartridge valve cover plate for pressure maintenance and cartridge valve cover plate device of the present invention

[0055]

[0056]

[0057] Through the above comparison, it can be seen that the present invention effectively reduces the damage rate of the hydraulically controlled one-way valve, reduces the labor intensity of on-site operators to a certain extent, greatly improves the safety and continuity of operations, and ensures safe production. Whether in terms of pressure retention, impact resistance, service life, and maintenance convenience, it is significantly superior to traditional cartridge valve cover plates.

[0058] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0059] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. All equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A plug-in valve cover plate device, characterized in that: It comprises a cover plate body (8), a threaded plug-in hydraulic reversing valve (1), an external control oil circuit and an internal control oil circuit; The cover plate body (8) is provided with a threaded plug-in hydraulic reversing valve (1), and an internal control oil circuit is provided inside the cover plate body (8); a through hole is provided at the bottom of the cover plate body (8) for connecting with the valve body bottom plate C cavity (14); The external control oil circuit comprises an X pilot control oil circuit (3); The internal control oil circuit comprises a first channel (5), a Z1 pilot control oil circuit (11), a Z2 valve core locking oil circuit (12) and a Y oil drain port oil circuit (13); The first channel is used to connect the No. Ⅰ port of the threaded plug-in hydraulic reversing valve (1) to the C cavity (14) of the valve body bottom plate; One end of the X pilot control oil circuit (3) is connected to the port a of the threaded plug-in hydraulic reversing valve (1), and the other end of the X pilot control oil circuit (3) is connected to the Z1 pilot control oil circuit (11), and the Z1 pilot control oil circuit (11) is used to connect to the port X of the valve body bottom plate; The Y drain port oil circuit (13) is used to connect the valve body bottom plate drain port Y with the No. III port of the threaded cartridge hydraulic reversing valve (1); the Z2 valve core locking oil circuit (12) is used to connect the valve body bottom plate external feedback port Z2 with the No. II port of the threaded cartridge hydraulic reversing valve (1); When the pilot control oil is fed back to the port a of the threaded cartridge hydraulic reversing valve (1) through the port X of the valve body bottom plate and the Z1 pilot control oil circuit (11), the valve core of the threaded cartridge hydraulic reversing valve (1) is in the left position, at which time the No. Ⅰ port is connected to the No. Ⅲ port, and the main oil circuit AB port is connected; When the pilot control oil is not given, the threaded cartridge hydraulic reversing valve (1) returns to its original position, and port Ⅰ is connected to port Ⅱ. At this time, the external feedback pressure acts on the top of the main valve core through the feedback port Z2, the Z2 valve core locking oil circuit (12), port Ⅱ, and port Ⅰ, pressing the main valve core of the main oil circuit onto the valve seat to cut off the AB port of the main oil circuit; The Z1 pilot control oil circuit (11) comprises a sixth hole (17), a seventh hole (18) and an eighth hole (19) which are connected in sequence; The Z2 valve core locking oil passage (12) comprises a fourth hole passage (15) and a fifth hole passage (16) which are connected to each other.

2. The cartridge valve cover plate device according to claim 1, characterized in that: The Y oil drain port oil passage (13) comprises a second hole channel (9) and a third hole channel (10) which are connected.

3. The cartridge valve cover plate device according to claim 1, characterized in that: The threaded plug-in hydraulic directional control valve (1) is a two-position three-way hydraulically controlled directional control valve.

4. The cartridge valve cover plate device according to claim 1, characterized in that: The X pilot control oil circuit (3) is a seamless precision tube.

5. The cartridge valve cover plate device according to claim 4, characterized in that: One end of the seamless precision tube is connected to the other end of the threaded plug-in hydraulic reversing valve (1) via an articulated ferrule joint (2), and the other end of the seamless precision tube is connected to one end of the Z1 pilot control oil circuit (11) via a ferrule straight-through pipe joint (4).

6. The cartridge valve cover plate device according to claim 1, characterized in that: A sealing device is provided at the connection between the cover plate body (8) and the valve body bottom plate C cavity (14).

7. The cartridge valve cover plate device according to claim 6, characterized in that: The sealing device comprises an O-ring (6) and a retaining ring (7).

Images