Progressive adjustable switch valve

Abstract

The invention discloses a progressive adjustable switch valve, and belongs to the technical field of oil pressure valve blocks, the progressive adjustable switch valve comprises a head block, a tail block and a plurality of middle blocks, the upper surfaces of the head block, each middle block and the tail block are respectively provided with an upper valve block to form a combined valve body; a propelling oil way channel, a circulating propelling oil way channel, a discharging oil way channel and a circulating discharging oil way channel which are communicated in a circulating mode are arranged in the combined valve body. The output oil pressure of the lubricating oil pump is divided into multiple paths and is automatically output in a single path one by one, so that it is guaranteed that each path outputs lubricating oil with enough pressure; and meanwhile, a single valve block is convenient to manufacture and can be combined in various ways, so that the flexibility is good, and different oil outlet quantities can be adjusted.

Description

Technical Field

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

[0002] Adding lubricating oil through a centralized lubrication system can reduce manual labor intensity and improve efficiency. The output oil pressure of the lubricating oil pump in a conventional centralized lubrication system is dispersed into multiple outputs, and the pressure of each path is much lower than the output pressure of the oil pump. For the case where the oil seal (or dust-proof ring) of the bearing has good tightness, the resistance is large, and the single-path oil pressure is too low, which will cause the lubricating oil not to enter the bearing, affecting the effect of centralized lubrication. Summary of the Invention

[0003] In order to overcome the deficiencies in the background art, the present invention provides a progressive adjustable switching valve, aiming to design a distribution valve block assembly that divides the output oil pressure of the lubricating oil pump into multiple paths and automatically outputs them one by one for each single path to ensure that each path outputs lubricating oil with sufficient pressure; on this basis, modular valve blocks are combined. The valve blocks are easy to manufacture, can be combined in various structures to form different oil outlet channels, have good flexibility and powerful functions.

[0004] To achieve the above object, the present invention provides the following technical solution: A progressive adjustable switching valve includes a first block, a last block, and a plurality of intermediate blocks. A double-headed screw rod assembly sequentially penetrates through the first block, the plurality of intermediate blocks, and the last block 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, each intermediate block, and the last block to form a combined valve body; a core cavity is provided inside the upper valve block, and a valve core is inserted into the core cavity and can translate left and right in the core cavity; both ends of the core cavity are radially enlarged to form piston cavities at both ends of the valve core; an oil outlet channel is provided inside each of the first block, each intermediate block, and the last block, and a one-way valve joint is connected to the side wall of each oil outlet channel, and the oil outlet channel is communicated with the one-way valve joint; a main oil channel is provided inside the lower valve body assembly; an oil inlet joint for docking with the main oil channel is provided at the rear end of the first block; a propulsion oil passage channel is provided inside the combined valve body for driving the next valve core to translate in the same direction after the previous valve core translates to one side; a circulating propulsion oil passage channel is provided inside the combined valve body for driving the valve core on the first block to translate in the opposite direction after the valve core on the last block translates to one side; a discharge oil passage channel is provided inside the combined valve body for the valve core to push the oil in the piston cavity to flow into the next oil outlet channel when the previous valve core translates to one side; a circulating discharge oil passage channel is provided inside the combined valve body for the valve core to push the oil in the piston cavity to flow into 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 that communicates with the core cavity. From left to right, they are the upper valve one - hole, the upper valve two - hole, the upper valve three - hole, the upper valve four - hole, the upper valve five - hole, the upper valve six - hole, and the upper valve seven - hole. 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. The upper surfaces of the first block, each intermediate block, and the tail block are all provided with lower valve seven - group holes that are in one - to - one correspondence with the upper valve seven - group holes. From left to right, they are the lower valve one - hole, the lower valve two - hole, the lower valve three - hole, the lower valve four - hole, the lower valve five - hole, the lower valve six - hole, and the lower valve seven - hole. 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. 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. The rear end face of the intermediate block is provided with a groove group hole, including a pair of horizontally long grooves and a pair of vertically long grooves that are symmetrically arranged 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. The lower parts of the left and right vertically long grooves are respectively provided with a lower valve rear - left - lower hole and a lower valve rear - right - lower hole that are communicated with the oil outlet passage. The left end of the horizontally long groove on the left is provided with a lower valve rear - left - upper hole that communicates with the lower valve one - hole, and the right end of the horizontally long groove on the right is provided with a lower valve rear - right - upper hole that communicates with the lower valve seven - hole. The front end of the intermediate block is provided with a four - group hole, including a lower valve front - left - upper hole, a lower valve front - right - upper hole, a lower valve front - left - lower hole, and a 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. The front end face of the first block is provided with the four - group hole that is in one - to - one correspondence with the groove group hole on the rear end face of the intermediate block. The rear end face of the tail block is provided with the same groove group hole as the intermediate block for one - to - one docking with the four - group hole of the intermediate block. The intermediate block is provided with a five - way through - hole that penetrates 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. The front end face of the first block is provided with a first - block front - side five - group hole that 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 docked 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 docked 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 docked 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 docked 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 docks 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 rear five-way group of holes of the tail block that docks with the five-way through holes of the middle block one by one, including a middle hole of the tail block, a left one hole of the tail block, a left two hole of the tail block, a right one hole of the tail block, and a right two hole of the tail block; the middle hole of the tail block docks 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 docks 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 docks 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 docks 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 docks 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 docking the middle hole of the first block, multiple 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, upper valve four hole, core cavity, upper valve five hole, lower valve five hole, upper right hole at the front side of the lower valve, the next horizontal long groove, the upper right hole at the rear side of the next lower valve, the next lower valve seven hole, the next upper valve seven hole, and the next piston cavity corresponding to the spool, 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 at the rear side of the lower valve, the next horizontal long groove, the upper left hole at 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 at the front side of the lower valve, the next vertical long groove, the upper left hole at the rear side of the next lower valve, the next oil outlet passage, and 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, upper valve four hole, core cavity, upper valve three hole, lower valve three hole, and the left two hole of the tail block on the tail block, the left two through holes of multiple 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 of the first block, and 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, multiple 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, multiple right one through holes, the right one hole of the first block, and 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 multiple middle blocks, for arranging a pair of oil outlet passages in each of the first block, the tail block, and multiple 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 for arranging a pair of oil outlet channels in each of the first block, the last block and the multiple intermediate blocks; a communication pipe is used to connect 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; a one-way valve joint is connected to both the left and right sides of the intermediate block installed with the solid adjusting plug; the two ends of the intermediate block not installed with the solid adjusting plug are respectively connected with a lower valve body plug and a one-way valve joint.

[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 for each of the first block, the last block and the multiple intermediate blocks to be provided with a pair of oil outlet channels; 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 joints 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 both ends of the through hole communicate with the side walls of the two connection holes; the hollow bolts are inserted into the connection holes, and the ends thereof are threadedly connected with the internally threaded holes preset at the ends of the oil outlet channels; an axial blind hole is provided at the end of the hollow bolt, and a radial blind hole communicating with the axial blind hole is provided on its side wall; the radial blind hole corresponds to the position of the side wall of the connection hole.

[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 installation holes penetrating through the upper and lower ends of the upper valve block are provided, and threaded holes corresponding to the installation 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 gaps of rotating components, and ensures the lubrication effect. Second, there are no other driving components or electromagnetic components to achieve oil circuit commutation, and the progressive commutation can be automatically completed only by 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, an intermediate block, a tail block and an upper valve block for separate manufacturing, which reduces the manufacturing difficulty and cost, and 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, there will be no valve jamming, and the oil discharge pressure is high; in addition, multiple valve cores can have different thicknesses, with less oil output for the thin ones and more oil output for the thick ones, so multiple one-way valve joints can output different amounts of oil, which 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 path individually to ensure that each path outputs lubricating oil with sufficient pressure; at the same time, a single valve block is easy to manufacture, can be combined in various ways, and can adjust different oil output amounts, with good flexibility; BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[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 at the A-A position of

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

[0021] Figure 6 is Figure 3 a cross-sectional view 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 at the F-F position of ;

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

[0024] Figure 9 Schematic diagram of the principle of sequential pushing of two adjacent valve cores in Embodiment 1 of the present invention;

[0025] Figure 10 Schematic diagram of the planar structure of the first block in Embodiment 1 of the present invention;

[0026] Figure 11 Schematic diagram of the three-dimensional structure 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 of sequential pushing of the first and last valve cores in Embodiment 1 of the present invention;

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

[0036] Figure 21 For Embodiment 2 of the present invention corresponding to 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 For Embodiment 3 of the present invention corresponding to 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 for 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 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 middle block valve core; 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 Detailed implementation mode

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with 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 switching valve includes 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 that docks with the main oil passage 22; A propulsion oil passage is provided in 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 in the combined valve body for driving the valve core 42 on the first block 1 to translate in the opposite direction after the valve core 42 on the tail block 2 translates to one side; A discharge oil passage is provided in 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 in 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 upper valve seven - port group holes 44 all communicating with the core cavity 41. From left to right, they 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 seven - port group holes 44 are symmetrically distributed left and right with the middle upper valve four - hole 444 as the reference; that is, upper valve three - hole 443 is symmetric with upper valve five - hole 445, upper valve two - hole 442 is symmetric with upper valve six - hole 446, and upper valve one - hole 441 is symmetric with upper valve seven - hole 447. The upper valve one - hole 441 and upper valve seven - hole 447 are respectively communicated 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 an oscillating reversing valve. By the left - and - right movement of the valve core 42, 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, upper valve two - hole 442 and upper valve three - hole 443 are communicated, upper valve four - hole 444 and upper valve five - hole 445 are communicated, and upper valve six - hole 446 is closed; at the same time, the valve core 42 moving to the left squeezes the left piston cavity 43, driving the oil discharge from upper valve one - hole 441. In working position two, upper valve five - hole 445 and upper valve six - hole 446 are communicated, upper valve three - hole 443 and upper valve four - hole 444 are communicated, and upper valve two - hole 442 is closed; at the same time, the valve core 42 moving to the right squeezes the right piston cavity 43, driving the oil discharge from upper valve seven - hole 447. Similarly, when oil enters through upper valve one - hole 441, it drives the valve core 42 to move to the right, and when oil enters through upper valve seven - hole 447, it drives the valve core 42 to move to the left. Among them, the upper valve block is provided with a through - hole to assemble the valve core 42, and then the orifice of the through - hole is reamed to form the piston cavity 43; then internal threads are machined at the orifice of the piston cavity 43 to form threaded holes 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 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, making the radial pressure on the valve core 42 more balanced and preventing the valve jamming failure caused by the skewing of the valve core 42. Among them, the upper valve one - hole 441 and upper valve seven - hole 447 on both sides of the upper valve seven - port group holes 44 in this embodiment are not in the same vertical plane as the other five holes, Figure 6 , Figure 7 the vertical plane of the cross - section passing through the axis of the valve core 42 does not pass through the upper valve one - hole 441 and 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 as to connect the oil circuits of the upper valve block and the lower valve block. Since the upper valve seven - group holes 44 are symmetrically distributed left and right with the upper valve four - hole 444 in the middle 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 channel 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 rear 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, which is convenient for assembly and positioning. When two intermediate blocks are butted, they can be quickly positioned.

[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 - 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 a groove - group hole that is in one - to - one docking with the four - group holes 32 on the front end face of the intermediate block, and this groove - group hole is the same as the groove - group hole 31 of the intermediate block. In order to form a circulating oil path to connect the first block 1 and the tail block 2, the tail block 2 also has a rear - side five - group hole 24 of the tail block for connecting the five - way through - hole 33 of the intermediate block, including a tail - block middle hole 241, a left - first hole 242 of the tail block, a left - second hole 243 of the tail block, a right - first hole 244 of the tail block, and a right - second hole 245 of the tail block; the tail - block middle hole 241 is docked with the middle through - hole 331 of the intermediate block, and its interior is communicated with the lower valve four - hole 234; the left - first hole 242 of the tail block is docked with the left - first through - hole 332 of the intermediate block, and its interior is communicated with the lower valve two - hole 232; the left - second hole 243 of the tail block is docked with the left - second through - hole 333 of the intermediate block, and its interior is communicated with the lower valve three - hole 233; the right - first hole 244 of the tail block is docked with the right - first through - hole 334 of the intermediate block, and its interior is communicated with the lower valve six - hole 236; the right - second hole 245 of the tail block is docked with the right - second through - hole 335 of the intermediate block, and its interior is communicated with 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 - 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 a four - group hole that is in one - to - one docking with the groove - group hole 31 on the rear end face of the intermediate block, and this four - group hole is the same as the four - group hole 32 of the intermediate block. In order to form a circulating oil path to connect the first block 1 and the tail block 2, the first block 1 also has a front - side five - group hole 12 of the first block for connecting the five - way through - hole 33 of the intermediate block, including a first - block middle hole 121, a left - first hole 122 of the first block, a left - second hole 123 of the first block, a right - first hole 124 of the first block, and a right - second hole 125 of the first block; the left - first hole 122 of the first block is docked with the left - first through - hole 332 of the intermediate block, and its interior is communicated with the oil outlet passage 21 of the first block 1; the left - second hole 123 of the first block is docked with the left - second through - hole 333 of the intermediate block, and its interior is communicated with the right - directed pipeline 13 preset inside the first block 1; the right - first hole 124 of the first block is docked with the right - first through - hole 334 of the intermediate block, and its interior is communicated with the oil outlet passage 21 of the first block 1; the right - second hole 125 of the first block is docked with the right - second through - hole 335 of the intermediate block, and its interior is communicated with the left - directed pipeline 14 preset inside the first block 1; the lower valve one - hole 231 of the first block 1 is communicated with the left - directed pipeline 14, and its lower valve seven - hole 237 is communicated with 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 communicated with the oil inlet joint 11.

[0051] The main oil passage 22 is formed by docking the first block intermediate hole 121, a plurality of 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] During use, as shown in FIGS. 6, 7, and 9, after the previous spool 42 translates to the left, the oil flow direction corresponding to the spool 42 is from the main oil passage 22 into the lower valve four holes 234, and then successively flows through the upper valve four holes 444, the spool 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 to drive the next spool 42 to translate to the same side; and so on, a plurality of the spools 42 translate to the left one by one. Vice versa, when one of the spools 42 translates to the right, it will successively drive the other spools 42 to translate to the right.

[0053] Meanwhile, as shown in FIGS. 6, 7, and 9, during use, after the previous spool 42 translates to the left and the next spool 42 also translates to the left through the above-mentioned propulsion oil passage, the spool 42 drives the piston cavity 43 on the right side to drain oil. According to the oil flow direction, the oil discharged from the next piston cavity 43 successively 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 spool 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 check valve joint 8 to drive the check valve to drain oil; the oil pressure overcomes the spring resistance of the check valve and is discharged out of 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 check valve joint 8), and only one oil outlet drains oil each time, which increases the oil outlet pressure and is convenient for injecting lubricating oil into the narrow gap of rotating components (such as bearings) to ensure the lubrication effect. Vice versa, when driving one of the spools 42 to translate to the left, it will also drain 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 spool 42 translates, it is necessary to be able to drive the first spool 42 to translate in the reverse direction. Therefore, the cyclic propulsion oil passage is as Figure 19As shown, 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 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 formed in 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 passages 21 are provided in each of the first block 1, the last 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 outputs oil each time, ensuring the oil outlet pressure. The oil output is repeated multiple times to ensure the supply amount of the lubricating oil, which is suitable for the situation where there are many lubrication points, the output amount of the lubricating oil is small, and the lubrication quality requirement is not high. In another implementation manner, blind holes are formed in 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 passages 21 are provided in each of the first block 1, the last block 2 and multiple intermediate blocks; the two oil outlet passages 21 are communicated through a communication pipe 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 of each one-way valve joint 8 is doubled, which is suitable for the situation where there are few lubrication points but the output amount of the lubricating oil is large. In addition, since a pair of oil outlet passages 21 are provided in each of the first block 1, the last block 2 and multiple intermediate blocks, and the two oil outlet passages 21 are communicated through a communication pipe 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 are all converged 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 formed in 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 passages 21 are provided in each of the first block 1, the last block 2 and multiple intermediate blocks; the two oil outlet passages 21 are communicated through a communication pipe 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 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 the ends thereof are in threaded connection with 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 the side wall thereof; 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, for example, the left sides of the first block 1 and the first intermediate block 3 in this embodiment are connected through a 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 a connecting pipeline 211. A one-way valve joint 8 is respectively connected to the right sides of the first block 1 and the first intermediate block 3. When supplying oil to the oil outlet channel 21 of the first intermediate block 3, oil is discharged simultaneously from the one-way valve joints 8 of the first intermediate block 3 and the first block 1. When supplying oil to the oil outlet channel 21 of the first block 1, oil is discharged simultaneously from the one-way valve joints 8 of the first block 1 and the first intermediate block 3. The advantage is that when supplying oil 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 one-way 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 a 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 circulated and interconnected through the oil outlet channel 21, and the output pressure values of the one-way 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, facilitates injecting lubricating oil into the narrow gaps of rotating components, and ensures 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 one-way valve joints 8 can output different amounts of oil, which can be flexibly adjusted according to needs.

[0060] In summary, the interior of this embodiment has multiple oil circuits that are interconnected in a loop, dividing the output oil pressure of the lubricating oil pump into multiple paths and capable of automatically outputting each path individually 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 the ability to 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 manner of the oil outlet passage 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 passages 21 are provided in the first block 1, the last block 2, and multiple intermediate blocks. Among them, the two oil outlet passages 21 of the first intermediate block 3 are connected through a communication pipe 211. One outer end of the oil outlet passage 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 passages 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 and only outputs oil from one side, with increased oil output pressure and increased oil output volume.

[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 pipe 211, the oil outlet direction and the number of oil outlet ports 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 pipe 211, and 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 manner of connecting or disconnecting a pair of oil outlet passages 21 in this embodiment is realized by a solid adjusting plug 212. First, the communication pipe 211 opened between a pair of oil outlet passages 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, and an internal hexagonal hole 213 or a slotted opening is provided at one end 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 passages 21 are disconnected. When the solid adjusting plug 212 is not installed in the threaded communication hole, a pair of oil outlet passages 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 passages 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 reinstall the one-way valve joint 8 or the lower valve body plug 6, and the oil outlet direction and the number of oil outlet ports can be changed, with convenient maintenance and flexible 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-way 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-way 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-way 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 with 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 rest of the upper valve blocks.

[0065] In other words, the fifth upper valve block 48 is replaced with 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 level 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 with 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-way 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-way 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-way 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 the oil outlet passage 21 is connected with a one-way valve joint 8, it will not discharge oil, and the oil outlet passage 21 is closed.

[0067] It should be noted that the first block 1, the last block 2 and 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, which also has the same technical effect. It should also be noted that although all the spool valves 42 are in the middle position, all the four holes 444 of the upper valve are closed, causing the entire combined valve body to stop. However, the initial position of the spool valve 42 in the above-mentioned embodiments can be set at least during assembly. As long as one of the spool valves 42 is located on one side to connect the four holes 444 of the upper valve to the main oil passage 22, the remaining spool valves 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 seven-hole group 44 of the upper valve 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, rather than 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, 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 recited claims and their equivalent features.

Claims

1. A progressively 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. A progressively 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 seven-hole group (44) of the upper valve is symmetrically distributed with the four holes (444) of the upper valve located in the middle as a reference; the valve core (42) is provided with two necking sections (421) symmetrically arranged on the left and right, so that when the valve core (42) is translated to the left, the two holes (442) of the upper valve are connected with the three holes (443) of the upper valve, the four holes (444) of the upper valve are connected with the five holes (445) of the upper valve, and the six holes (446) of the upper valve are closed; when the valve core (42) is translated to the right, the five holes (445) of the upper valve are connected with the six holes (446) of the upper valve, the three holes (443) of the upper valve are connected with the four holes (444) of the upper valve, and the two holes (442) of the upper valve are closed; The rear end surface of the middle 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 symmetrical with respect to the middle position of the middle block; the horizontally long grooves (311) and the vertically long grooves (312) are respectively close to the upper and lower ends of the middle 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 are connected to the oil outlet passage (21); the left end of the horizontally long groove (311) located on the left side is provided with a lower valve rear side upper left hole (315) that is connected to the lower valve first hole (231), and the right end of the horizontally long groove (311) located on the right side is provided with a lower valve rear side upper right hole (316) that is connected to the lower valve seventh hole (237); The front end of the intermediate block is provided with a quadruple group of holes (32), including an upper left hole (321) on the front side of the lower valve, an upper right hole (322) on the front side of the lower valve, a lower left hole (323) on the front side of the lower valve, and a lower right hole (324) on the front side of the lower valve; the upper left hole (321) on the front side of the lower valve is connected to the third hole (233) of the lower valve; the upper right hole (322) on the front side of the lower valve is connected to the fifth hole (235) of the lower valve; the lower left hole (323) on the front side of the lower valve is connected to the second hole (232) of the lower valve; the lower right hole (324) on the front side of the lower valve is connected to the sixth hole (236) of the lower valve; The front end surface of the first block (1) is provided with the four-combination holes (32) which are connected one-to-one with the groove-combination holes (31) on the rear end surface of the middle block; the rear end surface of the tail block (2) is provided with the same groove-combination holes (31) as those of the middle block, which are used to connect one-to-one with the four-combination holes (32) of the middle block; The middle block is provided with five through holes (33) running through its front and rear ends, including a middle through hole (331), a left through hole (332), a left through hole (333), a right through hole (334), and a right through hole (335); the front end surface of the first block (1) is provided with a first block front side five-linked group of holes (12) which are connected one-to-one with the five through holes (33) on the rear end surface of the middle block, including a first block middle hole (121), a first block left hole (122), a first block left second hole (123), a first block right hole (124), and a first block right second hole (125); the first block left hole (122) is connected with the left through hole (332) of the middle block, and its interior is communicated with the oil outlet passage (21) of the first block (1); the first block left second hole (123) is connected with the middle block The first block (1) is connected to the second left through hole (333) of the first block, and its interior is connected to the right-direction pipeline (13) preset in the first block (1); the first right hole (124) of the first block is connected to the first right through hole (334) of the middle block, and its interior is connected to the oil outlet passage (21) of the first block (1); the first right second hole (125) of the first block is connected to the second right through hole (335) of the middle block, and its interior is connected to the left-direction pipeline (14) preset in the first block (1); the first lower valve hole (231) of the first block (1) is connected to the left-direction pipeline (14), and the seventh lower valve hole (237) of the first block (1) is connected to the right-direction pipeline (13); the first middle hole (121) of the first block is connected to the middle through hole (331) of the middle block, and its interior is connected to the oil inlet joint (11); The rear end surface of the tail block (2) is provided with five groups of holes (24) at the rear side of the tail block, which are connected one by one with the five groups of through holes (33) of the middle block, including a middle hole (241) of the tail block, a left hole (242) of the tail block, a second left hole (243) of the tail block, a right hole (244) of the tail block, and a second right hole (245) of the tail block; the middle hole (241) of the tail block is connected with the middle through hole (331) of the middle block, and its interior is communicated with the four holes (234) of the lower valve; the left hole (242) of the tail block is connected with the middle hole (242) of the middle block, and the right hole (243 ... The left through hole (332) of the tail block is connected to the left through hole (332), and its interior is connected to the second hole (232) of the lower valve; the left two holes (243) of the tail block are connected to the left two through holes (333) of the middle block, and its interior is connected to the third hole (233) of the lower valve; the right one hole (244) of the tail block is connected to the right one through hole (334) of the middle block, and its interior is connected to the sixth hole (236) of the lower valve; the right two holes (245) of the tail block are connected to the right two through holes (335) of the middle block, and its interior is connected to the fifth hole (235) of the lower valve; The main oil passage (22) is formed by the connection of the middle hole (121) of the first block, a plurality of middle through holes (331), and the middle hole (241) of the tail block.

3. A progressively adjustable on-off valve according to claim 2, characterized in that: When the valve core (42) is translated to the left, the propulsion oil passage includes four holes (234) of the lower valve corresponding to the valve core (42), four holes (444) of the upper valve, a core cavity (41), five holes (445) of the upper valve, five holes (235) of the lower valve, a right upper hole (322) on the front side of the lower valve, a next horizontal groove (311), a right upper hole (316) on the rear side of the next lower valve, seven holes (237) of the next lower valve, seven holes (447) of the next upper valve, and a next piston cavity (43), so as to drive the next valve core (42) to translate to the same side; When the valve core (42) is translated to the left, the discharge oil passage includes the next piston chamber (43), the next upper valve hole (441), the next lower valve hole (231), the upper left hole (315) on the rear side of the lower valve, the next horizontal groove (311), the upper left hole (321) on the front side of the lower valve, the three holes (233) of the lower valve, the three holes (443) of the upper valve, the core chamber (41), the two holes (442) of the upper valve, the two holes (232) of the lower valve, the lower left hole (323) on the front side of the lower valve, the next vertical 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), so as to drive the one-way valve to discharge oil; When the valve core (42) on the tail block (2) is translated to the right, the circulating propulsion oil passage comprises the four holes (234) of the lower valve, the four holes (444) of the upper valve, the core cavity (41), the three holes (443) of the upper valve, the three holes (233) of the lower valve, the two left holes (243) of the tail block, the two left through holes (333) of the plurality of middle blocks, the two left holes (123) of the first block, the right-hand pipeline (13), the seven holes (237) of the lower valve of the first block (1), the seven holes (447) of the upper valve on the first block (1), and the piston cavity (43), so as to drive the valve core (42) on the first block (1) to translate to the opposite side; When the valve core (42) on the first block (1) is translated to the left, the circulating discharge oil passage includes the piston chamber (43) on the first block (1), an upper valve hole (441), a lower valve hole (231), a left-direction pipeline (14), the first block right two holes (125), a plurality of right two through holes (335), the tail block right two holes (245), the lower valve five holes (235), the upper valve five holes (445), the core chamber (41), the upper valve six holes (446), the lower valve six holes (236), the tail block right one hole (244), a plurality of right one through holes (334), the first block right one hole (124), and the oil outlet passage (21) of the first block (1), so as to drive the oil in the left piston chamber (43) of the first block (1) to be discharged into the oil outlet passage (21) of the first block (1).

4. A progressively adjustable on-off valve according to claim 1, characterized in that: The left and right side walls of the first block (1), the tail block (2) and the plurality of middle blocks are each provided with a blind hole for providing a pair of oil outlet passages (21) in the first block (1), the tail block (2) and the plurality of middle blocks; the outer ends of each pair of the oil outlet passages (21) are connected to one of the one-way valve joints (8).

5. The progressively adjustable on-off valve according to claim 1, characterized in that: The left and right side walls of the first block (1), the tail block (2) and the plurality of middle blocks are each provided with a blind hole for providing a pair of oil outlet passages (21) in the first block (1), the tail block (2) and the plurality of middle blocks; each pair of the oil outlet passages (21) is connected via a connecting pipe (211), and the connecting pipe (211) is a threaded connecting hole; a solid regulating plug (212) is screwed into the threaded connecting hole of at least one of the middle blocks; the left and right sides of the middle block equipped with the solid regulating plug (212) are each connected to a one-way valve joint (8); and the two ends of the middle block not equipped with the solid regulating plug (212) are respectively connected to a lower valve body plug (6) and a one-way valve joint (8).

6. A progressively adjustable on-off valve according to claim 3, characterized in that: The left and right side walls of the first block (1), the tail block (2) and the plurality of intermediate blocks are each provided with a blind hole, and each of the first block (1), the tail block (2) and the plurality of intermediate blocks is provided with a pair of oil outlet passages (21); each pair of the oil outlet passages (21) is connected via a connecting pipe (211); a connecting plate assembly (7) is mounted on one side of the lower valve body assembly, and is used to connect two adjacent oil outlet passages (21) on the same side; and two oil outlet passages (21) on the opposite side of the connecting plate assembly (7) are respectively connected to a one-way valve joint (8).

7. A progressively adjustable on-off valve according to claim 6, characterized in that: The connecting plate assembly (7) comprises a connecting plate (71) and two hollow bolts (72); the connecting plate (71) comprises two connecting holes (711), a through hole (712) located between the two connecting holes (711) is provided inside the connecting plate (71), and two ends of the through hole (712) are connected to the side walls of the two connecting holes (711); The hollow bolt (72) is inserted into the connecting hole (711), and the end thereof is threadedly connected to an internal threaded hole preset at the end of the oil outlet passage (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 the side wall of the hollow bolt (722); the radial blind hole (722) corresponds to the position of the side wall of the connecting hole (711).

8. The progressively adjustable on-off valve according to claim 6, characterized in that: An internal pipe 1 (448) and an internal pipe 2 (449) are provided in the upper valve block on the middle block adjacent to the tail block (2); the upper valve 3 hole (443) in the upper valve 7-group hole (44) of the upper valve block is connected to the upper valve 1 hole (441) via the internal pipe 1 (448); the upper valve 5 hole (445) is connected to the upper valve 7 hole (447) via the internal pipe 2 (449); the upper valve 2 hole (442), the upper valve 4 hole (444) and the upper valve 6 hole (446) are closed; and the oil outlet passage (21) of the tail block (2) is closed.

9. The progressively adjustable on-off valve according to claim 1, characterized in that: The upper valve block is provided with a group of mounting holes (51) penetrating the upper and lower ends thereof, and the upper surfaces of the first block (1), the tail block (2) and the plurality of intermediate blocks are all provided with threaded holes corresponding to the mounting holes (51) for mounting the upper valve block on the lower valve body assembly by means of bolts.

10. The progressively 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 tail block (2) are smaller than the diameters of the valve cores (42) in the other upper valve blocks.

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