A progressive adjustable on-off valve

Abstract

The present invention discloses a progressive adjustable switching valve, belonging to the technical field of oil pressure valve blocks, which includes a first block, a tail block and a plurality of intermediate blocks. An upper valve block is installed on the upper surface of the first block, each intermediate block and the tail block to form a combined valve body; a propulsion oil passage, a circulating propulsion oil passage, a discharge oil passage and a circulating discharge oil passage that are circulated and interconnected are arranged in the combined valve body. The present invention divides the output oil pressure of the lubricating oil pump into multiple paths and automatically outputs them one by one in a single path to ensure that the lubricating oil with sufficient pressure is output in each path; at the same time, each single valve block is convenient to manufacture and can be combined in various ways, with good flexibility to adjust different oil output volumes.

Description

Technical Field

[0001] The invention belongs to the technical field of oil pressure valve blocks and relates to the technical field of centralized lubrication, and specifically is a progressively adjustable switch valve. Background Art

[0002] The centralized lubrication system can reduce labor intensity and improve efficiency by adding lubricating oil. The output oil pressure of the lubricating oil pump of the conventional centralized lubrication system is dispersed into multiple outputs, and the pressure of each output is much lower than the output pressure of the oil pump. For the case where the oil seal (or dust ring) of the bearing has good sealing performance, the resistance is large, and the oil pressure of a single output is too low, which will cause the lubricating oil to fail to enter the bearing, affecting the effect of centralized lubrication. Summary of the invention

[0003] In order to overcome the shortcomings of the background technology, the present invention provides a progressive adjustable switching valve, the purpose of which is to design a distribution valve block assembly to divide the output oil pressure of the lubricating oil pump into multiple channels, and automatically output single channels one by one to ensure that each channel outputs lubricating oil with sufficient pressure; on this basis, modular valve blocks are combined, the valve blocks are easy to manufacture, and can be combined in various structures to form different oil outlet channels, with good flexibility and powerful functions.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a progressively adjustable switch valve, comprising a first block, a tail block and a plurality of intermediate blocks, a double-headed screw assembly sequentially passes through the first block, the plurality of intermediate blocks and the tail block, and fixes them into a lower valve body assembly; an upper valve block is installed on the upper surface of the first block, each intermediate block and the tail block to form a combined valve body; a core cavity is provided inside the upper valve block, a valve core is inserted in the core cavity, and can be translated left and right in the core cavity; both ends of the core cavity are radially expanded to form piston cavities at both ends of the valve core; an oil outlet channel is provided inside the first block, each intermediate block and the tail block, and the side walls thereof are connected to a one-way valve joint, and the oil outlet channel is connected to the one-way valve joint; a main oil is provided inside the lower valve body assembly channel; the rear end of the first block is provided with an oil inlet joint connected to the main oil channel; the combined valve body is provided with a propulsion oil channel, which is used to drive the next valve core to translate to the same side after the current valve core translates to one side; the combined valve body is provided with a circulation propulsion oil channel, which is used to drive the valve core on the first block to translate to the opposite side after the valve core on the tail block translates to one side; the combined valve body is provided with a discharge oil channel, which is used for the valve core to push the oil in the piston cavity to flow to the next oil outlet channel when the current valve core translates to one side; the combined valve body is provided with a circulation discharge oil channel, which is used for the valve core to push the oil in the piston cavity to flow to the oil outlet channel of the first block when the valve core on the first block translates to one side.

[0005] As a further optimization, the lower end of the upper valve block is provided with an upper valve seven - group hole which is communicated with the core cavity. From left to right, they are upper valve one hole, upper valve two hole, upper valve three hole, upper valve four hole, upper valve five hole, upper valve six hole, and upper valve seven hole respectively; the upper valve one hole and the upper valve seven hole are respectively communicated with the piston cavities at both ends of the valve core; on the upper surfaces of the first block, each intermediate block and the tail block, there are lower valve seven - group holes which are in one - to - one correspondence with the upper valve seven - group holes. From left to right, they are lower valve one hole, lower valve two hole, lower valve three hole, lower valve four hole, lower valve five hole, lower valve six hole, and lower valve seven hole respectively; the upper valve four hole is communicated with the main oil passage through the lower valve four hole; the upper valve seven - group holes are symmetrically distributed left and right with the upper valve four hole in the middle as the reference; the valve core is provided with two symmetrically arranged neck - down sections on the left and right. When the valve core translates to the left, the upper valve two hole and the upper valve three hole are communicated, the upper valve four hole and the upper valve five hole are communicated, and the upper valve six hole is closed. When the valve core translates to the right, the upper valve five hole and the upper valve six hole are communicated, the upper valve three hole and the upper valve four hole are communicated, and the upper valve two hole is closed; on the rear end face of the intermediate block, there is a groove group hole, including a pair of horizontally long grooves and a pair of vertically long grooves which are symmetrically distributed left and right with the middle position of the intermediate block as the reference; the horizontally long grooves and the vertically long grooves are respectively close to the upper and lower ends of the intermediate block; at the lower parts of the two vertically long grooves on the left and right, there are lower valve rear left - lower hole and lower valve rear right - lower hole which are communicated with the oil outlet passage respectively; at the left end of the horizontally long groove on the left, there is a lower valve rear left - upper hole which is communicated with the lower valve one hole, and at the right end of the horizontally long groove on the right, there is a lower valve rear right - upper hole which is communicated with the lower valve seven hole; on the front end of the intermediate block, there is a four - group hole, including lower valve front left - upper hole, lower valve front right - upper hole, lower valve front left - lower hole, and lower valve front right - lower hole; the lower valve front left - upper hole is communicated with the lower valve three hole; the lower valve front right - upper hole is communicated with the lower valve five hole; the lower valve front left - lower hole is communicated with the lower valve two hole; the lower valve front right - lower hole is communicated with the lower valve six hole; on the front end face of the first block, there is the four - group hole which is in one - to - one correspondence with the groove group hole on the rear end face of the intermediate block; on the rear end face of the tail block, there is the same groove group hole as that of the intermediate block, which is used to be in one - to - one correspondence with the four - group hole of the intermediate block; the intermediate block is provided with a five - way through - hole penetrating through its front and rear ends, including a middle through - hole, a left one through - hole, a left two through - hole, a right one through - hole, and a right two through - hole; on the front end face of the first block, there is a first - block front - side five - group hole which is in one - to - one correspondence with the five - way through - hole on the rear end face of the intermediate block, including a first - block middle hole, a first - block left one hole, a first - block left two hole, a first - block right one hole, and a first - block right two hole; the first - block left one hole is butted with the left one through - hole of the intermediate block, and its interior is communicated with the oil outlet passage of the first block; the first - block left two hole is butted with the left two through - hole of the intermediate block, and its interior is communicated with the right - hand pipeline preset inside the first block; the first - block right one hole is butted with the right one through - hole of the intermediate block, and its interior is communicated with the oil outlet passage of the first block; the first - block right two hole is butted with the right two through - hole of the intermediate block, and its interior is communicated with the left - hand pipeline preset inside the first block;The lower valve one hole of the first block communicates with the leftward pipeline, and its lower valve seven hole communicates with the rightward pipeline; the middle hole of the first block is butted with the middle through hole of the middle block, and its interior communicates with the oil inlet joint; the rear end face of the tail block is provided with a set of five rear holes of the tail block that are butted one by one with the five-way through hole of the middle block, including the middle hole of the tail block, the left one hole of the tail block, the left two hole of the tail block, the right one hole of the tail block, and the right two hole of the tail block; the middle hole of the tail block is butted with the middle through hole of the middle block, and its interior communicates with the lower valve four hole; the left one hole of the tail block is butted with the left one through hole of the middle block, and its interior communicates with the lower valve two hole; the left two hole of the tail block is butted with the left two through hole of the middle block, and its interior communicates with the lower valve three hole; the right one hole of the tail block is butted with the right one through hole of the middle block, and its interior communicates with the lower valve six hole; the right two hole of the tail block is butted with the right two through hole of the middle block, and its interior communicates with the lower valve five hole; the main oil passage is formed by butting the middle hole of the first block, a plurality of middle through holes, and the middle hole of the tail block.

[0006] As a further optimization, after the previous spool moves horizontally to the left, the advancing oil passage includes the lower valve four hole corresponding to the spool, the upper valve four hole, the core cavity, the upper valve five hole, the lower valve five hole, the upper right hole on the front side of the lower valve, the next horizontal long groove, the upper right hole on the rear side of the next lower valve, the next lower valve seven hole, the next upper valve seven hole, the next piston cavity, to drive the next spool to move horizontally on the same side; after the previous spool moves horizontally to the left, the discharge oil passage includes the next piston cavity, the next upper valve one hole, the next lower valve one hole, the upper left hole on the rear side of the lower valve, the next horizontal long groove, the upper left hole on the front side of the lower valve, the lower valve three hole, the upper valve three hole, the core cavity, the upper valve two hole, the lower valve two hole, the lower left hole on the front side of the lower valve, the next vertical long groove, the upper left hole on the rear side of the next lower valve, the next oil outlet passage, the one-way valve joint, to drive the one-way valve to discharge oil; after the spool on the tail block moves horizontally to the right, the circulating advancing oil passage includes the lower valve four hole on the tail block, the upper valve four hole, the core cavity, the upper valve three hole, the lower valve three hole, the left two hole of the tail block, the left two through holes of a plurality of middle blocks, the left two hole of the first block, the rightward pipeline, the lower valve seven hole of the first block, the upper valve seven hole on the first block, the piston cavity, to drive the spool on the first block to move horizontally to the opposite side. After the spool on the first block moves horizontally to the left, the circulating discharge oil passage includes the piston cavity on the first block, the upper valve one hole, the lower valve one hole, the leftward pipeline, the right two hole of the first block, a plurality of right two through holes, the right two hole of the tail block, the lower valve five hole, the upper valve five hole, the core cavity, the upper valve six hole, the lower valve six hole, the right one hole of the tail block, a plurality of right one through holes, the right one hole of the first block, the oil outlet passage of the first block, to drive the oil in the piston cavity on the left side of the first block to be discharged into the oil outlet passage of the first block.

[0007] As a further optimization, blind holes are provided on the left and right side walls of the first block, the tail block, and a plurality of middle blocks, for arranging a pair of oil outlet passages in the first block, the tail block, and a plurality of middle blocks; a one-way valve joint is connected to the outer end of each pair of oil outlet passages.

[0008] As a further optimization, blind holes are provided on the left and right side walls of the first block, the last block and the multiple intermediate blocks, and a pair of oil outlet channels are arranged in each of the first block, the last block and the multiple intermediate blocks; a communication pipe is connected between each pair of the oil outlet channels, and the communication pipe is a threaded communication hole; a solid adjusting plug is screwed into the threaded communication hole of at least one of the intermediate blocks; one-way valve connectors are connected to both the left and right sides of the intermediate block where the solid adjusting plug is installed; the two ends of the intermediate block without the solid adjusting plug are respectively connected to the lower valve body plug and the one-way valve connector.

[0009] As a further optimization, blind holes are provided on the left and right side walls of the first block, the last block and the multiple intermediate blocks, and a pair of oil outlet channels are provided in each of the first block, the last block and the multiple intermediate blocks; each pair of the oil outlet channels is communicated through a communication pipe; a communication plate assembly is installed on one side of the lower valve body assembly for communicating two adjacent oil outlet channels on the same side; one-way valve connectors are respectively connected to the two oil outlet channels on the opposite side of the communication plate assembly.

[0010] As a further optimization, the communication plate assembly includes a communication plate and two hollow bolts; the communication plate includes two connection holes, and a through hole located between the two connection holes is provided inside the communication plate, and the two side walls of the through hole communicate with the two connection holes; the hollow bolts are inserted into the connection holes, and the ends thereof are threadedly connected to the internally threaded holes preset at the ends of the oil outlet channels; axial blind holes are provided at the ends of the hollow bolts, and radial blind holes communicating with the axial blind holes are provided on the side walls; the radial blind holes correspond to the positions of the side walls of the connection holes.

[0011] As a further optimization, an internal pipe one and an internal pipe two are provided in the upper valve block on the intermediate block adjacent to the last block; the upper valve three hole in the upper valve seven - group hole of the upper valve block communicates with the upper valve one hole through the internal pipe one, the upper valve five hole communicates with the upper valve seven hole through the internal pipe two, and the upper valve two hole, the upper valve four hole and the upper valve six hole are closed; the oil outlet channel of the last block is closed.

[0012] As a further optimization, a set of mounting holes penetrating the upper and lower ends of the upper valve block are provided, and threaded holes corresponding to the mounting holes are provided on the upper surfaces of the first block, the last block and the multiple intermediate blocks for installing the upper valve block on the lower valve body assembly through bolt connection.

[0013] As a further optimization, the valve core diameters in the upper valve blocks on the first block and the last block are smaller than the valve core diameters in the remaining upper valve blocks.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: First, there is only one oil inlet and multiple oil outlets, and only one oil outlet discharges oil each time, which increases the oil discharge pressure, facilitates injecting lubricating oil into the narrow gap of the rotating component, and ensures the lubrication effect. Second, there are no other driving components or electromagnetic components to achieve oil circuit commutation. It can automatically complete progressive commutation only relying on the input pressure of the oil inlet joint, with low cost and good reliability. Third, the whole is divided into a first block, a middle block, a tail block and an upper valve block for separate manufacturing, which reduces the manufacturing difficulty and cost. Moreover, multiple valve blocks can be combined to produce different configurations to meet the needs of different users, with good flexibility. Fourth, each upper valve block is connected in parallel to the main oil passage, so that the driving force of each valve core comes from the main oil passage pressure. The translation of the valve core is more reliable, without valve jamming, and the oil discharge pressure is high. In addition, multiple valve cores can have different thicknesses. The thinner one has less oil discharge, and the thicker one has more oil discharge. Therefore, multiple one-way valve joints can output different oil volumes and can be flexibly adjusted according to needs.

[0015] In summary, the present invention has multiple internally circulating and interconnected oil circuits, divides the output oil pressure of the lubricating oil pump into multiple paths, and can automatically output each single path one by one to ensure that each path outputs lubricating oil with sufficient pressure. At the same time, each single valve block is easy to manufacture, can be combined in various ways, and can adjust different oil discharge volumes, with good flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structure schematic diagram of Embodiment 1 of the present invention from one perspective;

[0017] Figure 2 is a three-dimensional structure schematic diagram of Embodiment 1 of the present invention from another perspective;

[0018] Figure 3 is a top view structure schematic diagram of Embodiment 1 of the present invention;

[0019] Figure 4 is Figure 3 a cross-sectional view taken at the A-A position of

[0020] Figure 5 is Figure 3 a cross-sectional view taken at the D-D position of

[0021] Figure 6 is Figure 3 a cross-sectional view taken at the E-E position of , omitting the one-way valve joint and the connecting plate assembly;

[0022] Figure 7 is Figure 3 a cross-sectional view taken at the F-F position of ;

[0023] Figure 8 is Figure 2 a cross-sectional view taken at the H-H position of ;

[0024] Figure 9 Schematic diagram of the principle that two adjacent valve cores in Embodiment 1 of the present invention are pushed in sequence;

[0025] Figure 10 Schematic plan view of the first block in Embodiment 1 of the present invention;

[0026] Figure 11 Schematic three-dimensional view of the first block in Embodiment 1 of the present invention;

[0027] Figure 12 is Figure 10 Cross-sectional structure schematic diagram at the Q-Q position of ;

[0028] Figure 13 is Figure 10 Cross-sectional structure schematic diagram at the J-J position of ;

[0029] Figure 14 is Figure 10 Cross-sectional structure schematic diagram at the K-K position of ;

[0030] Figure 15 is Figure 10 Cross-sectional structure schematic diagram at the M-M position of ;

[0031] Figure 16 is Figure 11 Cross-sectional structure schematic diagram at the N-N position of ;

[0032] Figure 17 is Figure 11 Cross-sectional structure schematic diagram at the O-O position of ;

[0033] Figure 18 Schematic diagram of the structure of the last block in Embodiment 1 of the present invention;

[0034] Figure 19 Schematic diagram of the principle that the first and last valve cores in Embodiment 1 of the present invention are pushed in sequence;

[0035] Figure 20 Schematic three-dimensional view of one of the intermediate blocks in Embodiment 1 of the present invention;

[0036] Figure 21 corresponding to Embodiment 2 of the present invention Figure 2 Cross-sectional view at the H-H position of ;

[0037] Figure 22 is Figure 21 Partial enlarged view at the R position of ;

[0038] Figure 23 corresponding to Embodiment 3 of the present invention Figure 3 Cross-sectional view at the F-F position of ;

[0039] Figure 24 Schematic diagram of the dual-channel structure of the four holes in the upper valve of Embodiment 1 of the present invention;

[0040] Figure 25 is Figure 24 bottom view of.

[0041] The corresponding relationship between the technical features and the reference numerals in the figure is as follows: the first block 1; the oil inlet joint 11; the oil inlet direction 111; the five-group holes on the front side of the first block 12; the middle hole of the first block 121; the first left hole of the first block 122; the second left hole of the first block 123; the first right hole of the first block 124; the second right hole of the first block 125; the rightward pipeline 13; the leftward pipeline 14; the tail block 2; the oil outlet channel 21; the connecting pipeline 211; the solid adjusting plug 212; the hexagon socket head hole 213; the main oil channel 22; the seven-group holes in the lower valve 23; the first hole in the lower valve 231; the second hole in the lower valve 232; the third hole in the lower valve 233; the fourth hole in the lower valve 234; the fifth hole in the lower valve 235; the sixth hole in the lower valve 236; the seventh hole in the lower valve 237; the five-group holes on the rear side of the tail block 24; the middle hole of the tail block 241; the first left hole of the tail block 242; the second left hole of the tail block 243; the first right hole of the tail block 244; the second right hole of the tail block 245; the middle block one 3; the groove group holes 31; the horizontally long groove 311; the vertically long groove 312; the lower left hole on the rear side of the lower valve 313; the lower right hole on the rear side of the lower valve 314; the upper left hole on the rear side of the lower valve 315; the upper right hole on the rear side of the lower valve 316; the four-group holes 32; the upper left hole on the front side of the lower valve 321; the upper right hole on the front side of the lower valve 322; the lower left hole on the front side of the lower valve 323; the lower right hole on the front side of the lower valve 324; the five-way through hole 33; the middle through hole 331; the first left through hole 332; the second left through hole 333; the first right through hole 334; the second right through hole 335; the middle block two 34; the middle block three 35; the middle block four 36; the positioning pin hole 37; the upper valve block one 4; the core cavity 41; the upper valve body plug 411; the valve core 42; the necking section 421; the piston cavity 43; the seven-group holes in the upper valve 44; the first hole in the upper valve 441; the second hole in the upper valve 442; the third hole in the upper valve 443; the fourth hole in the upper valve 444; the fifth hole in the upper valve 445; the sixth hole in the upper valve 446; the seventh hole in the upper valve 447; the internal pipeline one 448; the internal pipeline two 449; the upper valve block two 45; the upper valve block three 46; the upper valve block four 47; the upper valve block five 48; the upper valve block six 49; the double-headed screw assembly 5; the installation hole 51; the counterbore hole 52; the lower valve body plug 6; the connecting plate assembly 7; the connecting plate 71; the connecting hole 711; the through hole 712; the hollow bolt 72; the axial blind hole 721; the radial blind hole 722; the one-way valve joint 8. Additionally, 251 represents the moving direction of the tail block valve core; 252 represents the connection relationship of the seven-group holes in the lower valve of the tail block; 253 represents the moving direction of the valve core of the middle block; 254 represents the connection relationship of the seven-group holes in the lower valve of the middle block; 255 represents the initial position of the valve core of the first block; 256 represents the initial state connection relationship of the seven-group holes in the lower valve of the first block; Figure 9 and Figure 19 The dotted lines and arrows in represent the oil flow direction. Detailed implementation mode

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention. For the convenience of narration, the oil inlet direction 111 of the oil inlet is the front. As Figure 3 shown, the left side of the oil inlet direction 111 is the left side, and the right side of the oil inlet direction 111 is the right side.

[0043] Embodiment 1; Please refer to Figure 1 - 20 , 24, 25.

[0044] The present invention provides the following technical solutions: A progressive adjustable on-off valve, including a first block 1, a tail block 2 and a plurality of intermediate blocks. The double-headed screw assembly 5 sequentially penetrates through the first block 1, a plurality of intermediate blocks and the tail block 2, and fixedly connects them into a lower valve body assembly; An upper valve block is installed on the upper surface of each of the first block 1, each intermediate block and the tail block 2 to form a combined valve body; A core cavity 41 is provided inside the upper valve block, and a valve core 42 is inserted into the core cavity 41 and can translate left and right in the core cavity 41; Both ends of the core cavity 41 are radially enlarged to form piston cavities 43 at both ends of the valve core 42; An oil outlet passage 21 is provided inside each of the first block 1, each intermediate block and the tail block 2, and a check valve joint 8 is connected to the side wall thereof, and the oil outlet passage 21 communicates with the check valve joint 8; A main oil passage 22 is provided inside the lower valve body assembly; The rear end of the first block 1 is provided with an oil inlet joint 11 for docking with the main oil passage 22; A propulsion oil passage is provided inside the combined valve body for driving the next valve core 42 to translate in the same direction after the previous valve core 42 translates to one side; A circulating propulsion oil passage is provided inside the combined valve body for driving the valve core 42 on the first block 1 to translate to the opposite side after the valve core 42 on the tail block 2 translates to one side; A discharge oil passage is provided inside the combined valve body for the valve core 42 to push the oil in the piston cavity 43 to flow into the next oil outlet passage 21 when the previous valve core 42 translates to one side; A circulating discharge oil passage is provided inside the combined valve body for the valve core 42 to push the oil in the piston cavity 43 to flow into the oil outlet passage of the first block 1 when the valve core 42 on the first block 1 translates to one side.

[0045] Among them, the upper valve block is provided with a set of mounting holes 51 penetrating through its upper and lower ends, and threaded holes corresponding to the mounting holes 51 are provided on the upper surfaces of the first block 1, the tail block 2 and a plurality of intermediate blocks for installing the upper valve block on the lower valve body assembly by bolt connection.

[0046] Among them, the first block 1, the last block 2, and multiple intermediate blocks are all lower valve blocks; therefore, there are six lower valve blocks in this embodiment, namely the first block 1, the last block 2, the first intermediate block 3, the second intermediate block 34, the third intermediate block 35, and the fourth intermediate block 36. There are six upper valve blocks, namely the first upper valve block 4, the second upper valve block 45, the third upper valve block 46, the fourth upper valve block 47, the fifth upper valve block 48, and the sixth upper valve block 49.

[0047] Regarding the upper valve block, the lower end of the upper valve block is provided with an upper valve seven - way group hole 44 that is in communication with the core cavity 41. From left to right, they are the upper valve one - hole 441, the upper valve two - hole 442, the upper valve three - hole 443, the upper valve four - hole 444, the upper valve five - hole 445, the upper valve six - hole 446, and the upper valve seven - hole 447. The upper valve seven - way group hole 44 is symmetrically distributed left and right with the middle upper valve four - hole 444 as the reference; that is, the upper valve three - hole 443 is symmetric with the upper valve five - hole 445, the upper valve two - hole 442 is symmetric with the upper valve six - hole 446, and the upper valve one - hole 441 is symmetric with the upper valve seven - hole 447. The upper valve one - hole 441 and the upper valve seven - hole 447 are respectively in communication with the piston cavities 43 at both ends of the valve core 42. The valve core 42 is provided with two neck - down sections 421 that are symmetric left and right. It can be seen that the upper valve block is a shock - type reversing valve. By moving the valve core 42 left and right, the oil - path direction is changed. Further, the upper valve block includes two working positions, namely working position one when the valve core 42 moves to the left and working position two when the valve core 42 moves to the right. In working position one, the upper valve two - hole 442 and the upper valve three - hole 443 are in communication, the upper valve four - hole 444 and the upper valve five - hole 445 are in communication, and the upper valve six - hole 446 is closed; at the same time, the valve core 42 moving to the left presses the left piston cavity 43, driving the upper valve one - hole 441 to drain oil. In working position two, the upper valve five - hole 445 and the upper valve six - hole 446 are in communication, the upper valve three - hole 443 and the upper valve four - hole 444 are in communication, and the upper valve two - hole 442 is closed; at the same time, the valve core 42 moving to the right presses the right piston cavity 43, driving the upper valve seven - hole 447 to drain oil. Similarly, when the upper valve one - hole 441 is supplied with oil, it drives the valve core 42 to move to the right, and when the upper valve seven - hole 447 is supplied with oil, it drives the valve core 42 to move to the left. Among them, the upper valve block is provided with a through - hole for assembling the valve core 42, and then the orifice of the through - hole is reamed to form a piston cavity 43; then an internal thread is machined at the orifice of the piston cavity 43 to form a threaded hole for installing the upper valve body plug 411. After the upper valve body plug 411 is installed, the core cavity 41 and the piston cavity 43 are closed. The detachable upper valve body plug 411 facilitates the replacement of the valve core 42. Among them, the upper valve four - hole 444 does not adopt a single round hole, but a double - channel structure, that is, two small holes are used to replace the round hole, as shown in combination 9, 24, and 25. The function is to evenly distribute the oil pressure from the main oil passage 22 to both sides of the valve core 42 radially, so that the valve core 42 is more evenly pressured radially, preventing the valve - sticking failure caused by the skewing of the valve core 42. Among them, the upper valve one - hole 441 and the upper valve seven - hole 447 on both sides of the upper valve seven - way group hole 44 in this embodiment are not in the same vertical plane as the other five holes, Figure 6 , Figure 7 the section plane is the vertical plane passing through the axis of the valve core 42, but does not pass through the upper valve one - hole 441 and the upper valve seven - hole 447. Therefore, from Figure 4 it can be seen that the axis of the upper valve one - hole 441 and the piston cavity 43 (i.e., the axis of the core cavity 41) is eccentric.

[0048] Regarding the intermediate block, the upper surface is provided with lower valve seven - group holes 23 that are in one - to - one butt - joint with the upper valve seven - group holes 44. From left to right, they are lower valve one - hole 231, lower valve two - hole 232, lower valve three - hole 233, lower valve four - hole 234, lower valve five - hole 235, lower valve six - hole 236, and lower valve seven - hole 237; so that the oil circuits of the upper valve block and the lower valve block are connected. Since the upper valve seven - group holes 44 are symmetrically distributed left and right with the middle upper valve four - hole 444 as the reference, the lower valve two - hole 232 is symmetric with the lower valve six - hole 236, the lower valve three - hole 233 is symmetric with the lower valve five - hole 235, and the lower valve one - hole 231 is symmetric with the lower valve seven - hole 237. At the same time, the intermediate block also needs to have the function of connecting the front and back. Therefore, the rear end face of the intermediate block is provided with a groove group hole 31, including a pair of horizontally long grooves 311 and a pair of vertically long grooves 312 that are symmetrically distributed left and right with the middle position of the intermediate block as the reference; the horizontally long grooves 311 and the vertically long grooves 312 are respectively close to the upper and lower ends of the intermediate block; the lower parts of the left and right vertically long grooves 312 are respectively provided with a lower valve rear left - lower hole 313 and a lower valve rear right - lower hole 314 that are connected to the oil outlet passage 21; the left end of the horizontally long groove 311 on the left side is provided with a lower valve rear left - upper hole 315 that is connected to the lower valve one - hole 231, and the right end of the horizontally long groove 311 on the right side is provided with a lower valve rear right - upper hole 316 that is connected to the lower valve seven - hole 237. The front end of the intermediate block is provided with a four - group hole 32, including a lower valve front left - upper hole 321, a lower valve front right - upper hole 322, a lower valve front left - lower hole 323, and a lower valve front right - lower hole 324; the lower valve front left - upper hole 321 is connected to the lower valve three - hole 233; the lower valve front right - upper hole 322 is connected to the lower valve five - hole 235; the lower valve front left - lower hole 323 is connected to the lower valve two - hole 232; the lower valve front right - lower hole 324 is connected to the lower valve six - hole 236. It can be seen that the oil circuits of two adjacent intermediate blocks need to bypass the upper valve block and then be output to the next lower valve block. In order to form a circulating oil circuit and connect the first block 1 and the last block 2, the intermediate block is provided with a five - way through - hole 33 that penetrates through its front and back ends, including a middle through - hole 331, a left one through - hole 332, a left two through - hole 333, a right one through - hole 334, and a right two through - hole 335. Among them, as Figure 11 , 12 shown, a positioning pin hole 37 is opened in the upper part of the front side of the intermediate block to install a positioning pin for convenient assembly and positioning, so that two intermediate blocks can be quickly positioned when docked.

[0049] Regarding the tail block 2, first, it is also necessary to dock with the valve block. The tail block 2 also has the same lower valve seven - connection - group holes 23 as the intermediate block. Secondly, it is also necessary to horizontally dock with the intermediate block. The rear end face of the tail block 2 is provided with groove - connection - group holes that are in one - to - one docking with the four - connection - group holes 32 on the front end face of the intermediate block. These groove - connection - group holes are the same as the groove - connection - group holes 31 of the intermediate block. In order to form a circulating oil path and connect the first block 1 and the tail block 2, the tail block 2 also has a rear - side five - connection - group hole 24 of the tail block for connecting the five - connection hole 33 of the intermediate block, including a tail - block middle hole 241, a tail - block left - first hole 242, a tail - block left - second hole 243, a tail - block right - first hole 244, and a tail - block right - second hole 245; the tail - block middle hole 241 is docked with the middle through - hole 331 of the intermediate block, and its interior is connected to the lower valve four - hole 234; the tail - block left - first hole 242 is docked with the left - first through - hole 332 of the intermediate block, and its interior is connected to the lower valve two - hole 232; the tail - block left - second hole 243 is docked with the left - second through - hole 333 of the intermediate block, and its interior is connected to the lower valve three - hole 233; the tail - block right - first hole 244 is docked with the right - first through - hole 334 of the intermediate block, and its interior is connected to the lower valve six - hole 236; the tail - block right - second hole 245 is docked with the right - second through - hole 335 of the intermediate block, and its interior is connected to the lower valve five - hole 235.

[0050] Regarding the first block 1, first, it is also necessary to dock with the valve block. The first block 1 also has the same lower valve seven - connection - group holes 23 as the intermediate block. Secondly, it is also necessary to horizontally dock with the intermediate block. The front end face of the first block 1 is provided with four - connection - group holes that are in one - to - one docking with the groove - connection - group holes 31 on the rear end face of the intermediate block. These four - connection - group holes are the same as the four - connection - group holes 32 of the intermediate block. In order to form a circulating oil path and connect the first block 1 and the tail block 2, the first block 1 also has a front - side five - connection - group hole 12 of the first block for connecting the five - connection hole 33 of the intermediate block, including a first - block middle hole 121, a first - block left - first hole 122, a first - block left - second hole 123, a first - block right - first hole 124, and a first - block right - second hole 125; the first - block left - first hole 122 is docked with the left - first through - hole 332 of the intermediate block, and its interior is connected to the oil - outlet channel 21 of the first block 1; the first - block left - second hole 123 is docked with the left - second through - hole 333 of the intermediate block, and its interior is connected to the right - directed pipeline 13 preset inside the first block 1; the first - block right - first hole 124 is docked with the right - first through - hole 334 of the intermediate block, and its interior is connected to the oil - outlet channel 21 of the first block 1; the first - block right - second hole 125 is docked with the right - second through - hole 335 of the intermediate block, and its interior is connected to the left - directed pipeline 14 preset inside the first block 1; the lower valve one - hole 231 of the first block 1 is connected to the left - directed pipeline 14, and its lower valve seven - hole 237 is connected to the right - directed pipeline 13; the first - block middle hole 121 is docked with the middle through - hole 331 of the intermediate block, and its interior is connected to the oil - inlet joint 11.

[0051] The main oil passage 22 is formed by docking the first block intermediate hole 121, multiple intermediate through holes 331, and the last block intermediate hole 241. The upper valve four holes 444 communicate with the main oil passage 22 through the lower valve four holes 234.

[0052] In use, as shown in Figures 6, 7, and 9 of the propulsion oil passage, after the previous valve core 42 translates to the left, the oil flow direction corresponding to this valve core 42 is from the main oil passage 22 into the lower valve four holes 234, and then flows through the upper valve four holes 444, the core cavity 41, the upper valve five holes 445, the lower valve five holes 235, the upper right hole 322 on the front side of the lower valve, the next horizontal long groove 311, the upper right hole 316 on the rear side of the next lower valve, the next lower valve seven holes 237, the next upper valve seven holes 447, and the next piston cavity 43 in sequence to drive the next valve core 42 to translate to the same side; and so on, multiple valve cores 42 translate to the left one by one. Vice versa, when one of the valve cores 42 translates to the right, it will drive the other valve cores 42 to translate to the right in sequence.

[0053] Meanwhile, as shown in Figures 6, 7, and 9 of the discharge oil passage, after the previous valve core 42 translates to the left and the next valve core 42 also translates to the left through the above-mentioned propulsion oil passage, the valve core 42 drives the piston cavity 43 on the right side to discharge oil. According to the oil flow direction, the oil discharged from the next piston cavity 43 flows through the next upper valve one hole 441, the next lower valve one hole 231, the upper left hole 315 on the rear side of the lower valve, the next horizontal long groove 311, the upper left hole 321 on the front side of the lower valve, the lower valve three holes 233, the upper valve three holes 443, the core cavity 41, the upper valve two holes 442, the lower valve two holes 232, the lower left hole 323 on the front side of the lower valve, the next vertical long groove 312, the lower left hole 313 on the rear side of the next lower valve, the next oil outlet passage 21, and the one-way valve joint 8 in sequence to drive the one-way valve to discharge oil; the oil pressure overcomes the spring resistance of the one-way valve and is discharged outside the combined valve body. It can be seen that in this embodiment, there is only one oil inlet (i.e., the oil inlet joint 11), there are multiple oil outlets (i.e., the one-way valve joints 8), and only one oil outlet discharges oil each time, which improves the oil outlet pressure and is convenient for injecting lubricating oil into the narrow gap of rotating parts (such as bearings) to ensure the lubrication effect. Vice versa, when driving one of the valve cores 42 to translate to the left, it will also discharge oil to the next oil outlet passage 21.

[0054] In order to enable multiple oil outlets to discharge oil repeatedly in a cycle to ensure the supply amount of lubricating oil. After the last valve core 42 translates, it is necessary to be able to drive the first valve core 42 to translate in the reverse direction. Therefore, the cyclic propulsion oil passage is as Figure 19As shown in the figure, 251 indicates the moving direction of the valve core 42 of the tail block 2; 252 indicates the connection relationship of the lower valve seven-group holes 23 of the tail block 2; 253 indicates the moving direction of the valve core 42 of the middle block; 254 indicates the connection relationship of the lower valve seven-group holes 23 of the middle block; 255 indicates the initial position of the valve core 42 of the head block 1, and 256 indicates the initial state connection relationship of the lower valve seven-group holes 23 of the head block 1; when the valve core 42 on the tail block 2 moves horizontally to the right, in the oil flow direction, the oil from the main oil passage 22 flows through the lower valve four holes 234, upper valve four holes 444, core cavity 41, upper valve three holes 443, lower valve three holes 233, left two holes 243 of the tail block, left two through holes 333 of multiple middle blocks, left two holes 123 of the head block, rightward pipeline 13, lower valve seven holes 237 of the head block 1, upper valve seven holes 447 on the head block 1, and piston cavity 43 in sequence, so as to drive the valve core 42 on the head block 1 to move horizontally to the opposite side. Thus, all the valve cores 42 are continuously driven to move left and right in a cycle, and lubricating oil is continuously output automatically.

[0055] Meanwhile, when the valve core 42 on the head block 1 moves horizontally to the left, the cyclic discharge oil passage is as Figure 19 shown. In the oil flow direction, it flows through the piston cavity 43, upper valve one hole 441, lower valve one hole 231, leftward pipeline 14, right two holes 125 of the head block, right two through holes 335 of multiple right two holes, right two holes 245 of the tail block, lower valve five holes 235, upper valve five holes 445, core cavity 41, upper valve six holes 446, lower valve six holes 236, right one hole 244 of the tail block, right one through holes 334 of multiple right one holes, right one hole 124 of the head block, and the oil outlet passage 21 of the head block 1 in sequence, so as to drive the oil in the left piston cavity 43 of the head block 1 to be discharged into the oil outlet passage 21 of the head block 1. Vice versa, when the valve core 42 on the head block 1 moves horizontally to the right, it can also drive the oil in the right piston cavity 43 to be discharged.

[0056] There can be multiple implementation manners for the oil outlet passage 21. In one implementation manner, blind holes are provided on the left and right side walls of the first block 1, the tail block 2 and multiple intermediate blocks, and a pair of oil outlet passages 21 are provided in each of the first block 1, the tail block 2 and multiple intermediate blocks; the two oil outlet passages 21 are not communicated with each other, and the outer ends are respectively connected to a one-way valve joint 8. In this implementation manner, oil outlet ports are provided at both ends of each lower valve block, and the number of oil outlet ports is large. Only one oil outlet port oils each time, ensuring the oil outlet pressure. The oil outlet is repeated multiple times to ensure the supply amount of lubricating oil, which is suitable for the situation where there are many lubrication points, the output amount of lubricating oil is small, and the lubrication quality requirement is not high. In another implementation manner, blind holes are provided on the left and right side walls of the first block 1, the tail block 2 and multiple intermediate blocks, and a pair of oil outlet passages 21 are provided in each of the first block 1, the tail block 2 and multiple intermediate blocks; the two oil outlet passages 21 are communicated through a communication pipeline 211 to form a passage. A lower valve body plug 6 is installed on one side of the passage, and a one-way valve joint 8 is installed on the other side. The number of oil outlet ports is half less than that of the above implementation manner, but the oil output amount of each one-way valve joint 8 is doubled, which is suitable for the situation where there are fewer lubrication points but the output amount of lubricating oil is larger. In addition, since a pair of oil outlet passages 21 are provided in each of the first block 1, the tail block 2 and multiple intermediate blocks, and the two oil outlet passages 21 are communicated through a communication pipeline 211 to form a passage. When the piston chambers 43 on the left and right sides of each upper valve block discharge oil respectively, they all flow into the same oil outlet passage 21, and the output oil amount when the valve core 42 moves left and right is kept balanced and stable.

[0057] In this embodiment, a more optimal implementation manner of the oil outlet passage 21 is adopted. Blind holes are provided on the left and right side walls of the first block 1, the tail block 2 and multiple intermediate blocks, and a pair of oil outlet passages 21 are provided in each of the first block 1, the tail block 2 and multiple intermediate blocks; the two oil outlet passages 21 are communicated through a communication pipeline 211 to form a passage; a communication plate assembly 7 is installed on one side of the passage for communicating two adjacent oil outlet passages 21. The other oil outlet passages 21 are all connected to one-way valve joints 8. Wherein, the communication plate assembly 7 includes a communication plate 71 and two hollow bolts 72; the communication plate 71 includes two connection holes 711, and a through hole 712 located between the two connection holes 711 is provided inside the communication plate 71, and both ends of the through hole 712 communicate with the side walls of the two connection holes 711; the hollow bolts 72 are inserted into the connection holes 711, and the ends thereof are threadedly connected to the internally threaded holes preset at the ends of the oil outlet passages 21; an axial blind hole 721 is provided at the end of the hollow bolt 72, and a radial blind hole 722 communicating with the axial blind hole 721 is provided on its side wall; the radial blind hole 722 corresponds to the position of the side wall of the connection hole 711.

[0058] More specifically, as Figure 8As shown in the figure, for example, the left sides of the first block 1 and the first intermediate block 3 in this embodiment are connected through the connecting plate assembly 7. The two oil outlet channels 21 of the first block 1 and the first intermediate block 3 are both connected through the connecting pipes 211. One check valve joint 8 is respectively connected to the right sides of the first block 1 and the first intermediate block 3. When oil is supplied to the oil outlet channel 21 of the first intermediate block 3, oil is discharged simultaneously from the check valve joints 8 of the first intermediate block 3 and the first block 1. When oil is supplied to the oil outlet channel 21 of the first block 1, oil is discharged simultaneously from the check valve joints 8 of the first block 1 and the first intermediate block 3. The advantage is that when oil is supplied to the oil outlet channel 21 of the first block 1, the oil supply path needs to pass through the lower valve body assembly and then return to the first block 1, with a long path and large pressure drop loss. By being connected in parallel with the oil outlet channel 21 of the first intermediate block 3, the oil discharge pressure of the check valve joint 8 of the first block 1 can be increased, ensuring that the lubricating oil provided by this path output has the same oil discharge pressure as the other intermediate blocks, and guaranteeing the lubrication effect. Similarly, the second intermediate block 34 and the third intermediate block 35 in this embodiment are connected in parallel through the connecting plate assembly 7 to ensure the balanced and stable oil discharge pressure of the second intermediate block 34 and the third intermediate block 35. In addition, the upper valve second hole 442, the upper valve sixth hole 446, the lower valve second hole 232, and the lower valve sixth hole 236 are all interconnected in a cycle through the oil outlet channel 21, and the output pressure values of the check valve joints 8 can all be kept stable.

[0059] The advantages of this embodiment compared with the prior art are as follows. First, there is only one oil inlet and multiple oil outlets, and only one oil outlet discharges oil each time, which increases the oil discharge pressure and is convenient for injecting lubricating oil into the narrow gaps of rotating components to ensure the lubrication effect. Second, there are no other driving components or electromagnetic components to achieve oil circuit commutation. Only relying on the input pressure of the oil inlet joint 11 can automatically complete progressive commutation, with low cost and good reliability. Third, the whole is divided into the first block 1, intermediate blocks, the tail block 2, and the upper valve block for separate manufacturing, reducing the manufacturing difficulty. Through the setting of multiple group connection holes, the holes of each valve block are straight holes, which are convenient for processing, with low manufacturing cost, and multiple valve blocks can be combined to produce different configurations to meet the needs of different users, with good flexibility. These group connection holes include the five-group connection holes 12 on the front side of the first block, the seven-group connection holes 23 of the lower valve, the five-group connection holes 24 on the rear side of the tail block, the groove group connection holes 31, the four-group connection holes 32, the five-connection holes 33, and the seven-group connection holes 44 of the upper valve. Fourth, each upper valve block is connected in parallel to the main oil channel 22, so that the driving force of each valve core 42 comes from the pressure of the main oil channel 22, and the translation of the valve core 42 is more reliable and there will be no valve jamming. In addition, multiple valve cores 42 can have different thicknesses. The thinner ones have less oil output, and the thicker ones have more oil output. Therefore, multiple check valve joints 8 can output different amounts of oil, which can be flexibly adjusted according to needs.

[0060] In summary, the internal structure of this embodiment has multiple oil circuits that are interconnected in a loop. The output oil pressure of the lubricating oil pump is divided into multiple paths, and it can automatically output one path at a time to ensure that each path outputs lubricating oil with sufficient pressure. At the same time, a single valve block is easy to manufacture and can be combined in various ways, with good flexibility, and can adjust different oil output amounts.

[0061] Embodiment 2, please refer to Figure 21 . The difference between this embodiment and Embodiment 1 lies in the implementation method of the oil outlet channel 21. Blind holes are opened on the left and right side walls of the first block 1, the last block 2, and multiple intermediate blocks, and a pair of oil outlet channels 21 are provided in each of the first block 1, the last block 2, and multiple intermediate blocks. Among them, the two oil outlet channels 21 of the first intermediate block 3 are connected through a communication pipeline 211. One outer end of the oil outlet channel 21 of the first intermediate block 3 is connected to the lower valve body plug 6, and the other outer end is connected to the one-way valve joint 8. The pair of oil outlet channels 21 of the remaining intermediate blocks, the first block 1, and the last block 2 are all disconnected, and a one-way valve joint 8 is respectively connected to both sides of each of them. The first intermediate block 3 is different from the remaining lower valve blocks. It only discharges oil from one side, and the oil discharge pressure increases and the oil output amount increases.

[0062] It can be seen that through the combined setting of the one-way valve joint 8, the lower valve body plug 6, and the communication pipeline 211, the oil discharge direction and the number of oil outlets are changed. By analogy, more output methods can be included through different permutations and combinations of the one-way valve joint 8, the lower valve body plug 6, and the communication pipeline 211, and they can be selected according to the needs of the lubrication points. At this time, no major modifications are made to the combined valve body itself, and the transformation cost for adapting to different lubrication requirements is low, and the configuration can be changed conveniently and quickly.

[0063] Among them, the implementation method of connecting or disconnecting a pair of oil outlet channels 21 in this embodiment is realized by a solid adjusting plug 212. First, the communication pipeline 211 opened between a pair of oil outlet channels 21 is a threaded communication hole. Secondly, an external thread is provided on the outer side of the middle part of the solid adjusting plug 212 for threaded connection with the threaded communication hole. One end of it is provided with an internal hexagonal hole 213, or a slotted opening, for connecting a screwdriver tool to drive the solid adjusting plug 212 to rotate. When the solid adjusting plug 212 is screwed into the threaded communication hole, a pair of oil outlet channels 21 are disconnected. When the solid adjusting plug 212 is not installed in the threaded communication hole, a pair of oil outlet channels 21 are connected. At this time, on-site transformation can be carried out. Without removing the pipelines connected to other lower valve bodies, only for a certain pair of oil outlet channels 21, first unscrew the one-way valve joint 8 or the lower valve body plug 6, install or remove the solid adjusting plug 213, and then install the one-way valve joint 8 or the lower valve body plug 6 back, then the oil discharge direction and the number of oil outlets can be changed, which is convenient for maintenance and flexible for adjustment.

[0064] Embodiment 3, please refer to Figure 22。The difference between this embodiment and Embodiment 1 is that the core cavity 41 and the spool 42 are not provided in the upper valve block (i.e., the fifth upper valve block 48) on the intermediate block adjacent to the tail block 2; the upper valve three holes 443 in the upper valve seven-group holes 44 of the fifth upper valve block 48 are communicated with the upper valve one hole 441 through the internal pipeline one 448, and the upper valve five holes 445 in the upper valve seven-group holes 44 are communicated with the upper valve seven holes 447 through the internal pipeline two 449; the upper valve two holes 442, the upper valve four holes 444 and the upper valve six holes 446 in the upper valve seven-group holes 44 are closed; the one-way valve joint 8 connected to the oil outlet passage 21 of the tail block 2 is replaced by a lower valve body plug 6 for closing the oil outlet passage 21 of the tail block 2. The diameter of the spool 42 in the upper valve blocks on the head block 1 and the tail block 2 is smaller than that of the spool 42 in the remaining upper valve blocks.

[0065] In other words, the fifth upper valve block 48 is replaced by a buffer valve block without the spool 42. Since the intermediate block four 36 is the farthest from the oil inlet joint 11, the pressure drop loss is large, the driving force provided to the spool 42 of the fifth upper valve block 48 is small, and the driving force provided to the spool 42 on the end tail block 2 will be even smaller. The spool 42 on the tail block 2 is prone to valve jamming, which will cause the failure of the overall circulating propulsion oil passage. To prevent the occurrence of this fault, one stage of the spool 42 is set less, and the oil outlet of the fourth upper valve block 47 directly drives the movement of the spool 42 of the sixth upper valve block 49 on the tail block 2, reducing the pressure drop loss and improving the reliability. Similarly, the movement of the spool 42 on the head block 1 is powered by the sixth upper valve block 49 on the tail block 2. The diameters of the spools 42 on the head block 1 and the tail block 2 are reduced to reduce the resistance and prevent the spools 42 on the head block 1 and the tail block 2 from jamming. Since the upper valve block on the intermediate block four 36 is replaced by a buffer valve block without the spool 42 and no longer supplies oil to the oil outlet passage 21 of the tail block 2, the oil outlet passage 21 of the tail block 2 is closed. This embodiment has higher reliability.

[0066] Another implementation manner with the same principle and effect in this embodiment is that the core cavity 41 and the spool 42 are still retained in the fifth upper valve block 48, and the internal pipeline one 448 and the internal pipeline two 449 bypass the core cavity 41, still enabling the upper valve three holes 443 in the upper valve seven-group holes 44 to be communicated with the upper valve one hole 441 through the internal pipeline one 448, and the upper valve five holes 445 in the upper valve seven-group holes 44 to be communicated with the upper valve seven holes 447 through the internal pipeline two 449; the upper valve two holes 442, the upper valve four holes 444 and the upper valve six holes 446 in the upper valve seven-group holes 44 are closed so that the core cavity 41 is closed. A plug block is arranged inside the oil outlet passage 21 of the tail block 2, and even if a one-way valve joint 8 is connected to the oil outlet passage 21, no oil will flow out, and the oil outlet passage 21 is closed.

[0067] It should be noted that the first block 1, the last block 2 and the multiple intermediate blocks of the lower valve body in Embodiment 1, or 2, or 3 all include multiple straight holes. Considering the need for convenient manufacturing, they are all designed as straight holes to form a propulsion oil passage, a discharge oil passage, a circulating propulsion oil passage, and a circulating discharge oil passage. Obviously, these lower valve bodies can be manufactured by 3D printing, so that the propulsion oil passage, the discharge oil passage, the circulating propulsion oil passage, and the circulating discharge oil passage do not depend on straight holes, and curved or bent holes can be formed in the lower valve body, and the same technical effects can be achieved. It should also be noted that although there is a situation where all the upper valve four holes 444 are closed when all the valve cores 42 are in the middle position, causing the overall combined valve body to stop. However, the initial positions of the valve cores 42 in the above embodiments can be set at least during assembly. As long as one of the valve cores 42 is located on one side to connect the upper valve four holes 444 to the main oil passage 22, the remaining valve cores 42 can be pushed in sequence to start working. In addition, the oil holes on the rear end faces of all the lower valve bodies are provided with corresponding counterbore holes 52 for installing rubber sealing rings to improve the sealing performance after docking; similarly, the seven holes of the upper valve seven-group holes 44 are also provided with corresponding counterbore holes 52.

[0068] The parts not detailed in the present invention are the prior art. Obviously, the described embodiments are only some preferred embodiments of the present invention, not all embodiments. For those of ordinary skill in the art, the technical features of the above-described embodiments can be combined arbitrarily. As long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention. The protection scope of the present invention is defined by the claimed claims and their equivalent features.

Claims

1. A progressive adjustable on-off valve, characterized in that; It comprises a first block (1), a tail block (2) and a plurality of intermediate blocks, wherein a double-headed screw assembly (5) sequentially penetrates the first block (1), the plurality of intermediate blocks and the tail block (2) to securely connect them to form a lower valve body assembly; an upper valve block is installed on the upper surface of the first block (1), each intermediate block and the tail block (2) to form a combined valve body; A core cavity (41) is provided inside the upper valve block, and a valve core (42) is inserted into the core cavity (41) and can be translated left and right in the core cavity (41); both ends of the core cavity (41) are radially enlarged to form piston cavities (43) at both ends of the valve core (42); The first block (1), each intermediate block and the tail block (2) are provided with an oil outlet passage (21) inside, and the side walls thereof are connected to a one-way valve joint (8), and the oil outlet passage (21) is in communication with the one-way valve joint (8); a main oil passage (22) is provided inside the lower valve body assembly; and an oil inlet joint (11) is provided at the rear end of the first block (1) and is connected to the main oil passage (22); A propulsion oil passage is provided in the combined valve body, which is used to drive the next valve core (42) to translate to the same side after the previous valve core (42) translates to one side; A circulating propulsion oil passage is provided in the combined valve body, which is used to drive the valve core (42) on the head block (1) to move horizontally to the opposite side when the valve core (42) on the tail block (2) moves horizontally to one side; The combined valve body is provided with a discharge oil passage, which is used for the valve core (42) to push the oil in the piston chamber (43) to flow to the next oil outlet passage (21) when the previous valve core (42) moves to one side; A circulating discharge oil passage is provided in the combined valve body, and is used for the valve core (42) to push the oil in the piston chamber (43) to flow toward the oil outlet passage (21) of the first block (1) when the valve core (42) on the first block (1) moves to one side.

2. The progressive adjustable on-off valve according to claim 1, characterized in that: The lower end of the upper valve block is provided with an upper valve seven-hole group (44) which are all in communication with the core cavity (41), and from left to right are upper valve one hole (441), upper valve two hole (442), upper valve three hole (443), upper valve four hole (444), upper valve five hole (445), upper valve six hole (446), and upper valve seven hole (447); the upper valve one hole (441) and the upper valve seven hole (447) are respectively in communication with the piston cavity (43) at both ends of the valve core (42); The upper surfaces of the first block (1), each of the middle blocks and the tail block (2) are provided with seven lower valve group holes (23) that are connected one-to-one with the seven upper valve group holes (44), and from left to right are lower valve hole 1 (231), lower valve hole 2 (232), lower valve hole 3 (233), lower valve hole 4 (234), lower valve hole 5 (235), lower valve hole 6 (236) and lower valve hole 7 (237); The four holes (444) of the upper valve are in communication with the main oil passage (22) via the four holes (234) of the lower valve; The upper valve seven - group holes (44) are symmetrically distributed left and right with the middle upper valve four - hole (444) as the reference; the valve core (42) is provided with two symmetrically arranged neck - down sections (421) on the left and right. When the valve core (42) translates to the left, the upper valve two - hole (442) and the upper valve three - hole (443) are connected, the upper valve four - hole (444) and the upper valve five - hole (445) are connected, and the upper valve six - hole (446) is closed. When the valve core (42) translates to the right, the upper valve five - hole (445) and the upper valve six - hole (446) are connected, the upper valve three - hole (443) and the upper valve four - hole (444) are connected, and the upper valve two - hole (442) is closed; The rear end face of the intermediate block is provided with a groove group hole (31), including a pair of horizontally long grooves (311) and a pair of vertically long grooves (312) that are symmetrically distributed left and right with the middle position of the intermediate block as the reference; the horizontally long grooves (311) and the vertically long grooves (312) are respectively close to the upper and lower ends of the intermediate block; the lower parts of the left and right vertically long grooves (312) are respectively provided with a lower valve rear - side lower - left hole (313) and a lower valve rear - side lower - right hole (314) that communicate with the oil outlet passage (21); the left end of the horizontally long groove (311) on the left is provided with a lower valve rear - side upper - left hole (315) that communicates with the lower valve one - hole (231), and the right end of the horizontally long groove (311) on the right is provided with a lower valve rear - side upper - right hole (316) that communicates with the lower valve seven - hole (237); The front end of the intermediate block is provided with a four - group hole (32), including a lower valve front - side upper - left hole (321), a lower valve front - side upper - right hole (322), a lower valve front - side lower - left hole (323), and a lower valve front - side lower - right hole (324); the lower valve front - side upper - left hole (321) communicates with the lower valve three - hole (233); the lower valve front - side upper - right hole (322) communicates with the lower valve five - hole (235); the lower valve front - side lower - left hole (323) communicates with the lower valve two - hole (232); the lower valve front - side lower - right hole (324) communicates with the lower valve six - hole (236); The front end face of the first block (1) is provided with the four - group hole (32) that is butt - jointed one - to - one with the groove group hole (31) on the rear end face of the intermediate block; the rear end face of the tail block (2) is provided with the same groove group hole (31) as the intermediate block for butt - jointing with the four - group hole (32) of the intermediate block one - to - one; The middle block is provided with a five-way through hole (33) penetrating through its front and rear ends, including a middle through hole (331), a left first through hole (332), a left second through hole (333), a right first through hole (334), and a right second through hole (335); the front end face of the first block (1) is provided with a first-block front-side five-way group hole (12) that is in one-to-one butt joint with the five-way through hole (33) on the rear end face of the middle block, including a first-block middle hole (121), a first-block left first hole (122), a first-block left second hole (123), a first-block right first hole (124), and a first-block right second hole (125); the first-block left first hole (122) is in butt joint with the left first through hole (332) of the middle block, and its interior is communicated with the oil outlet channel (21) of the first block (1); the first-block left second hole (123) is in butt joint with the left second through hole (333) of the middle block, and its interior is communicated with the rightward pipeline (13) preset inside the first block (1); the first-block right first hole (124) is in butt joint with the right first through hole (334) of the middle block, and its interior is communicated with the oil outlet channel (21) of the first block (1); the first-block right second hole (125) is in butt joint with the right second through hole (335) of the middle block, and its interior is communicated with the leftward pipeline (14) preset inside the first block (1); the first lower valve hole (231) of the first block (1) is communicated with the leftward pipeline (14), and its seventh lower valve hole (237) is communicated with the rightward pipeline (13); the first-block middle hole (121) is in butt joint with the middle through hole (331) of the middle block, and its interior is communicated with the oil inlet joint (11); The rear end face of the tail block (2) is provided with a tail-block rear-side five-way group hole (24) that is in one-to-one butt joint with the five-way through hole (33) of the middle block, including a tail-block middle hole (241), a tail-block left first hole (242), a tail-block left second hole (243), a tail-block right first hole (244), and a tail-block right second hole (245); the tail-block middle hole (241) is in butt joint with the middle through hole (331) of the middle block, and its interior is communicated with the fourth lower valve hole (234); the tail-block left first hole (242) is in butt joint with the left first through hole (332) of the middle block, and its interior is communicated with the second lower valve hole (232); the tail-block left second hole (243) is in butt joint with the left second through hole (333) of the middle block, and its interior is communicated with the third lower valve hole (233); the tail-block right first hole (244) is in butt joint with the right first through hole (334) of the middle block, and its interior is communicated with the sixth lower valve hole (236); the tail-block right second hole (245) is in butt joint with the right second through hole (335) of the middle block, and its interior is communicated with the fifth lower valve hole (235); The main oil channel (22) is formed by butt-jointing the first-block middle hole (121), a plurality of middle through holes (331), and the tail-block middle hole (241).

3. The progressive adjustable switching valve according to claim 2, characterized in that: After the previous spool (42) is translated horizontally to the left, the propulsion oil passage includes the lower valve four holes (234), upper valve four holes (444), spool cavity (41), upper valve five holes (445), lower valve five holes (235), lower valve front upper right hole (322), next horizontal long groove (311), next lower valve rear upper right hole (316), next lower valve seven holes (237), next upper valve seven holes (447), and next piston cavity (43) corresponding to the spool (42), so as to drive the next spool (42) to translate horizontally on the same side; After the previous spool (42) is translated horizontally to the left, the discharge oil passage includes the next piston cavity (43), next upper valve one hole (441), next lower valve one hole (231), lower valve rear upper left hole (315), next horizontal long groove (311), lower valve front upper left hole (321), lower valve three holes (233), upper valve three holes (443), spool cavity (41), upper valve two holes (442), lower valve two holes (232), lower valve front lower left hole (323), next vertical long groove (312), next lower valve rear lower left hole (313), next oil outlet passage (21), and check valve joint (8), so as to drive the check valve to discharge oil; After the spool (42) on the tail block (2) is translated horizontally to the right, the circulating propulsion oil passage includes the lower valve four holes (234), upper valve four holes (444), spool cavity (41), upper valve three holes (443), lower valve three holes (233), left two holes (243) on the tail block (2), left two through holes (333) of multiple intermediate blocks, left two holes (123) of the head block, rightward pipeline (13), lower valve seven holes (237) of the head block (1), upper valve seven holes (447) on the head block (1), and piston cavity (43), so as to drive the spool (42) on the head block (1) to translate horizontally to the opposite side; After the spool (42) on the head block (1) is translated horizontally to the left, the circulating discharge oil passage includes the piston cavity (43) on the head block (1), upper valve one hole (441), lower valve one hole (231), leftward pipeline (14), right two holes (125) of the head block, multiple right two through holes (335), right two holes (245) of the tail block, lower valve five holes (235), upper valve five holes (445), spool cavity (41), upper valve six holes (446), lower valve six holes (236), right one hole (244) of the tail block, multiple right one through holes (334), right one hole (124) of the head block, and oil outlet passage (21) of the head block (1), so as to drive the oil in the left piston cavity (43) of the head block (1) to be discharged into the oil outlet passage (21) of the head block (1).

4. The progressive adjustable switching valve according to claim 1, wherein: Blind holes are provided on the left and right side walls of the head block (1), tail block (2), and multiple intermediate blocks for arranging a pair of oil outlet passages (21) in each of the head block (1), tail block (2), and multiple intermediate blocks; a check valve joint (8) is connected to the outer end of each pair of the oil outlet passages (21).

5. The progressive adjustable on-off valve according to claim 1, characterized in that: Blind holes are provided on the left and right side walls of the first block (1), the last block (2) and multiple intermediate blocks, and a pair of oil outlet channels (21) are arranged in the first block (1), the last block (2) and multiple intermediate blocks; a communication pipe (211) is connected between each pair of the oil outlet channels (21), and the communication pipe (211) is a threaded communication hole; a solid adjusting plug (212) is screwed into the threaded communication hole of at least one of the intermediate blocks; one-way valve connectors (8) are connected to both the left and right sides of the intermediate block equipped with the solid adjusting plug (212); the two ends of the intermediate block without the solid adjusting plug (212) are respectively connected to a lower valve body plug (6) and a one-way valve connector (8).

6. The progressive adjustable switching valve according to claim 3, characterized in that: Blind holes are provided on the left and right side walls of the first block (1), the last block (2) and multiple intermediate blocks, and a pair of oil outlet channels (21) are provided in the first block (1), the last block (2) and multiple intermediate blocks; each pair of the oil outlet channels (21) is communicated through a communication pipe (211); a communication plate assembly (7) is installed on one side of the lower valve body assembly to communicate two adjacent oil outlet channels (21) on the same side; one-way valve connectors (8) are respectively connected to the two oil outlet channels (21) on the opposite side of the communication plate assembly (7).

7. The progressive adjustable on-off valve according to claim 6, characterized in that: The communication plate assembly (7) includes a communication plate (71) and two hollow bolts (72); the communication plate (71) includes two connection holes (711), and a through hole (712) located between the two connection holes (711) is arranged inside the communication plate (71), and the two ends of the through hole (712) communicate with the side walls of the two connection holes (711). The hollow bolts (72) are inserted into the connection holes (711), and their ends are threadedly connected to the internally threaded holes preset at the ends of the oil outlet channels (21); axial blind holes (721) are provided at the ends of the hollow bolts (72), and radial blind holes (722) communicating with the axial blind holes (721) are provided on their side walls; the radial blind holes (722) correspond to the positions of the side walls of the connection holes (711).

8. The progressive adjustable on-off valve according to claim 6, characterized in that: An internal pipe one (448) and an internal pipe two (449) are arranged in the upper valve block of the intermediate block adjacent to the last block (2); the upper valve three holes (443) in the upper valve seven-group holes (44) of the upper valve block are communicated with the upper valve one hole (441) through the internal pipe one (448), the upper valve five holes (445) are communicated with the upper valve seven holes (447) through the internal pipe two (449), and the upper valve two holes (442), the upper valve four holes (444) and the upper valve six holes (446) are closed; the oil outlet channels (21) of the last block (2) are closed.

9. The progressive adjustable switching valve according to claim 1, characterized in that: The upper valve block is provided with a group of mounting holes (51) penetrating through its upper and lower ends, and threaded holes corresponding to the mounting holes (51) are provided on the upper surfaces of the first block (1), the last block (2) and multiple intermediate blocks for mounting the upper valve block on the lower valve body assembly through bolts.

10. The progressive adjustable on-off valve according to claim 1, characterized in that: The diameters of the valve cores (42) in the upper valve blocks on the first block (1) and the last block (2) are smaller than the diameters of the valve cores (42) in the remaining upper valve blocks.

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