A progressive dispensing valve with dual core merging

Abstract

The application discloses a double-valve-core combined flow progressive distribution valve and belongs to the technical field of centralized lubrication. The valve comprises a first block, a tail block, and a combined valve body composed of a plurality of staggered negative blocks and positive blocks between the first block and the tail block. The first block and the tail block are both positive blocks. The combined valve body is provided with a staggered discharge oil passage for driving the next positive block to discharge oil after the valve core of the current negative block translates to one side and for driving the positive block to discharge oil after the valve core of the current positive block translates to one side. The application can realize double-valve-core combined flow oil discharge, has low pressure drop loss, smooth oil discharge, heat dispersion of the combined valve body, and improved heat resistance and reliability.

Description

Technical Field

[0001] This invention belongs to the field of centralized lubrication technology, specifically a progressive distribution valve with dual-core confluence. Background Technology

[0002] Existing progressive distribution valves in the field of centralized lubrication technology, such as the patent "A Progressive Adjustable Switch Valve" with publication number CN120083902B, primarily function to automatically and sequentially output lubricating oil from the main oil passage into individual channels, ensuring sufficient pressure in each channel. However, they have several drawbacks. First, the large number of upper and lower valve blocks, resulting in numerous mating surfaces and interfaces, makes sealing at these surfaces and interfaces difficult and increases the risk of oil leakage. Second, the discharged oil travels back and forth between the upper and lower valve blocks, creating a long and winding oil path with significant pressure drop and overall valve body resistance. This high resistance hinders the smooth flow of high-pressure oil from the pump, leading to increased valve body temperature after prolonged operation. Third, its oil discharge route involves multiple valve blocks discharging oil sequentially in a single direction from the first to the last block. However, the oil discharged from the pump at the first block is at a higher temperature. Due to the unidirectional sequential oil discharge method, the valve blocks near the first block have higher temperatures and those near the last block have lower temperatures, resulting in uneven heat distribution. Since the valve body itself has limited heat dissipation capacity, heat continuously concentrates towards the first block, easily causing the valve core near the first block to expand due to heat and jam. Fourth, although it is possible to connect the oil outlets of two valve blocks in parallel by adding a connecting plate and hollow bolts to merge the two outlets and increase the single-pass oil output, in reality, only one piston oil chamber discharges oil each time, and the single-pass oil output is not significantly increased. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a progressive distribution valve with dual-core confluence. The purpose is to change the structure and arrangement of the valve blocks, reduce the number of valve blocks, improve sealing reliability, and reduce oil circuit pressure drop loss. At the same time, the oil circuit direction is optimized to unidirectional staggered oil discharge, so that the heat of the valve body is quickly dispersed, avoiding heat concentration and improving heat resistance reliability.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a dual-core confluence progressive distribution valve, comprising a first block and a last block, and a plurality of staggered negative and positive blocks located between the first block and the last block; all blocks that mate with the first block and the last block are positive blocks; a pair of long bolts pass through the pre-set connecting holes in the middle of the first block, all positive blocks, and all negative blocks, and are then screwed into the pre-set threaded blind hole in the last block, thereby tightly pressing the first block, all positive blocks, all negative blocks, and the last block together to form a combined valve body; the lower part of each negative block and positive block is provided with a core cavity. The core cavity expands radially at both ends to form piston oil chambers. A valve core that can slide left and right is inserted into the core cavity to drive the piston oil chamber on that side to discharge oil when the valve core moves to one side. The combined valve body has a main oil passage from the first block to the last block in the middle. The rear end of the first block has an oil inlet connector that connects to the main oil passage. The upper part of the block has an oil outlet passage, and the end of the oil outlet passage is connected to an oil outlet connector. The combined valve body has a propulsion oil passage for driving the next valve core to move to the same side after the previous valve core moves to one side. The combined valve body is provided with a circulating propulsion oil passage, which is used to drive the valve core of the first positive block to move to the opposite side after the valve core on the last positive block moves to one side; the combined valve body is provided with a staggered discharge oil passage, which is used to drive the next positive block to discharge oil after the valve core of the previous negative block moves to one side, and to drive the positive block to discharge oil after the valve core of the previous positive block moves to one side; the combined valve body is provided with a circulating discharge oil passage, which is used to drive the oil discharged from the piston oil chamber of the first positive block to pass through the tail block and then return to the positive block for discharge after the valve core on the first positive block moves to one side.

[0005] As a further optimization, a central through hole for forming the main oil passage is provided at the center of the first block, the positive block, and the negative block; first block hole one and first block hole two, and first block hole three and first block hole four are respectively provided on both sides of the front end face of the first block; first block hole three and first block hole one are arranged vertically and connected through a pre-set pipe inside the first block; first block hole four and first block hole two are arranged vertically and connected through a pre-set pipe inside the first block; an elongated groove one and an elongated groove two are provided in the middle of the front end face of the first block; the negative block has a central through hole one and a central through hole two located above the central through hole, and a side through hole three and a side through hole four located on both sides of the negative block; the two ends of the inclined oil hole one are respectively connected to the central through hole and the core cavity; in the inclined oil hole An inclined oil hole 2 and an inclined oil hole 3 are respectively provided on both sides of the negative block; the two ends of the inclined oil hole 2 and the inclined oil hole 3 are respectively connected to the core cavity and the front end face of the negative block; the rear end face of the negative block is provided with intermediate block hole 1 and intermediate block hole 2 arranged on both sides of the central through hole, and the ends of intermediate block hole 1 and intermediate block hole 2 are respectively connected to the inclined oil hole 2 and the inclined oil hole 3; the front end face of the negative block located below the central through hole is provided with elongated groove 3 and elongated groove 4; the bottom surfaces of elongated groove 3 and elongated groove 4 are respectively provided with intermediate block hole 3 and intermediate block hole 4 connecting to the core cavity; the two sides of the rear end face of the negative block are provided with intermediate block hole 5 and intermediate block hole 6 respectively connecting to the two piston oil chambers; the inclined oil hole 2 and the inclined oil hole 3 are respectively located in the intermediate block hole 3. The positive block is identical to the negative block except for the following differences; the difference between the positive block and the negative block is that the ends of the intermediate block holes one and two are not connected to the inclined oil holes two and three, respectively; the oil outlet passage runs through the upper left and right sides of the positive block, and the two oil outlet connectors are located on the left and right end faces of the positive block, respectively; the upper ends of the two vertical oil passages are connected to the oil outlet passage, and their lower ends are connected to the ends of the intermediate block holes one and two, respectively; the rear end face of the tail block is provided with a central plug that seals the central through hole; the tail block hole one and tail block hole two are provided below the central plug, the tail block hole three and tail block hole four are provided above it, and the tail block hole five and tail block hole six are provided on both sides of it; The tail block has a tail block hole 7 and a tail block hole 8 on its upper two sides of the front end face; the tail block has an internal pipe for connecting the tail block hole 1 and the tail block hole 8, the tail block hole 2 for connecting the tail block hole 7, the tail block hole 3 for connecting the tail block hole 6, and the tail block hole 4 for connecting the tail block hole 5; when the tail block is connected to the main block, the central plug is inserted into the central through hole to seal it; the tail block hole 1 and the tail block hole 2 are connected to the central block hole 4 and the central block hole 3 respectively; the tail block hole 3 and the tail block hole 4 are connected to the central through hole 2 and the central through hole 1 respectively; the tail block hole 5 and the tail block hole 6 are connected to the inclined oil hole 3 and the inclined oil hole 2 respectively; the tail block hole 7 and the tail block hole 8 are connected to the side through hole 4 and the side through hole 3 respectively.When the positive block and the negative block are connected, their central through holes, intermediate through holes one, intermediate through holes two, side through holes three, and side through holes four are connected end to end; the oblique oil holes two and three of the previous block are connected to the intermediate block holes one and two of the next block, respectively; the elongated grooves three and four of the previous block are connected to the intermediate block holes five and six of the next block, respectively; when the positive block is connected to the first block, their central through holes are connected end to end; the first block holes one and two of the first block are connected to the intermediate block holes five and six, respectively; the first block Hole 3 and the first hole 4 respectively align with the side through hole 3 and the side through hole 4; the elongated groove 1 aligns with the middle block hole 1 and the middle through hole 1; the elongated groove 2 aligns with the middle block hole 2 and the middle through hole 2; the valve core has two symmetrically symmetrical necked portions, used so that when the valve core moves to the right, the inclined oil hole 1 connects with the middle block hole 4 and the inclined oil hole 1 connects with the middle block hole 3, and used so that when the valve core moves to the left, the inclined oil hole 1 connects with the middle block hole 3 and the inclined oil hole 3 connects with the middle block hole 4.

[0006] As a further optimization, after the current valve core moves to the right, the propulsion oil passage includes an inclined oil hole 1, a core cavity, an intermediate block hole 4, an elongated groove 4, a next intermediate block hole 6, and a next piston oil cavity corresponding to that valve core, so as to drive the next valve core to move to the same side; when the valve core on the last block moves to the right, the circulation propulsion oil passage includes an inclined oil hole 1, a core cavity, an intermediate block hole 4, an elongated groove 4, a tail block hole 1, a tail block hole 8, and multiple side passages corresponding to that valve core. Hole 3, first hole 3, first hole 1, middle hole 5 on the first positive block, piston oil chamber on the first positive block, so that the valve core on the first positive block moves to the opposite side; after the valve core of the previous negative block moves to the right, the staggered discharge oil passage includes the middle hole 5 corresponding to the valve core, the elongated groove 3 of the previous positive block, the middle hole 3 of the previous positive block, the core cavity of the previous positive block, the oblique oil hole 2 of the previous positive block, the middle hole 1 of the current negative block, and the middle hole of the next positive block. 1. The vertical oil passage of the next positive block and the oil outlet passage of the next positive block are used to allow the next positive block to discharge oil. After the valve core of the previous positive block moves to the right, the staggered oil discharge passage includes the middle block hole five corresponding to the current valve core, the elongated groove three of the previous negative block, the middle block hole three of the previous negative block, the core cavity of the previous negative block, the oblique oil hole two of the previous negative block, the middle block hole one of the current positive block, the vertical oil passage of the current positive block, and the oil outlet passage of the current positive block to allow the current positive block to discharge oil. When the first positive block... After the valve core on the block moves to the right, the circulating discharge oil passage includes the middle block hole five, the first block hole one, the first block hole three, multiple side through holes three, the tail block hole eight, the tail block hole one, the middle hole three of the last positive block, the core cavity of the last positive block, the oblique oil hole three of the last positive block, the tail block hole five, the tail block hole four, multiple middle through holes one, the first block elongated groove, the middle block hole one of the first positive block, the vertical oil passage and the oil outlet passage of the first positive block, so that the first positive block can discharge oil.

[0007] As a further optimization, the oil outlet channel includes blind holes one on each of the upper parts of the left and right side walls of the block. Each blind hole one is a threaded hole for the oil outlet connector to be screwed onto the blind hole one. A horizontal oil passage is opened on the bottom surface of the blind hole one, and the ends of the two horizontal oil passages are respectively connected to the two ends of a connecting oil passage. The inner wall of the connecting oil passage is provided with internal threads, which are used to disconnect the two horizontal oil passages when the inner plug is threaded into the connecting oil passage. The bottoms of the two blind holes two opened at the top of the block are respectively connected to the two horizontal oil passages. The blind holes two are threaded holes for threaded connection of blind hole plugs, and a gap is left between the blind hole plug and the bottom surface of the blind hole two.

[0008] As a further optimization, the negative block also has the same oil outlet as the positive block.

[0009] As a further optimization, the oil outlet connector is a one-way valve connector.

[0010] As a further optimization, the front faces of the first block, the negative block, and the positive block are all rubber ring faces, and annular grooves are provided at the edges of all holes on the rubber ring faces for installing annular rubber rings.

[0011] As a further optimization, a pair of mounting holes penetrating the bottom surface are provided on the upper surface of the first piece.

[0012] As a further optimization, the first block and the last block include two positive blocks and one negative block.

[0013] As a further optimization, the valve core diameters on the negative block and the positive block are different.

[0014] The advantages of this invention are as follows: First, compared with the prior art, the number of valve blocks is greatly reduced, as are the mating surfaces and interfaces, improving sealing reliability and reducing the risk of oil leakage. Second, compared with the prior art, the combined valve body eliminates the upper and lower oil passages, with the middle block having only a horizontal oil passage. This greatly shortens the oil path, reduces the number of bends in the oil passage, minimizes pressure drop losses, and ensures smooth oil discharge. Rapid oil discharge also helps cool the combined valve body. Third, the oil discharge from the first valve block bypasses the tail block, quickly transferring heat to the cold-end tail block. This facilitates heat dispersion in the combined valve body, preventing heat concentration at the front end and avoiding valve jamming, thus improving heat resistance and reliability. Fourth, the staggered oil discharge paths increase the single-pass oil discharge volume of a single outlet channel through the dual-core confluence. Simultaneously, it accelerates heat transfer between adjacent valve blocks, resulting in rapid heat dispersion and discharge, which is beneficial for cooling.

[0015] In summary, this invention enables the combined flow of oil from two valve cores, resulting in less pressure drop and loss, smooth oil discharge, heat dispersion of the combined valve body, rapid heat dissipation, and improved heat resistance and reliability. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present invention after the long bolts have been removed.

[0017] Figure 2 This is a schematic diagram of the planar structure of the first block in Embodiment 1 of the present invention.

[0018] Figure 3 for Figure 2 A schematic diagram of the AA cross-sectional structure.

[0019] Figure 4 This is a schematic diagram of the longitudinal cross-sectional structure of the first block in Embodiment 1 of the present invention.

[0020] Figure 5 This is a three-dimensional structural diagram of the negative block in Embodiment 1 of the present invention.

[0021] Figure 6 This is a schematic diagram of the longitudinal cross-sectional structure of the negative block in Embodiment 1 of the present invention.

[0022] Figure 7 for Figure 6 Schematic diagram of the three cross-sectional structures: BB, CC, and DD.

[0023] Figure 8 This is a three-dimensional structural diagram of a block according to Embodiment 1 of the present invention.

[0024] Figure 9 This is a schematic diagram of the longitudinal cross-sectional structure of the block in Embodiment 1 of the present invention.

[0025] Figure 10 for Figure 9 Schematic diagram of the three cross-sectional structures: EE, FF, and GG.

[0026] Figure 11 This is a schematic diagram illustrating the working principle of the valve core in the core cavity according to Embodiment 1 of the present invention.

[0027] Figure 12 This is a three-dimensional structural diagram of the tail block in Embodiment 1 of the present invention.

[0028] Figure 13 This is a schematic diagram of the internal structure of the tail block after the outer wall of the tail block has been made transparent, in accordance with Embodiment 1 of the present invention, and is intended to show the oil passage structure inside the tail block.

[0029] Figure 14 This is a schematic diagram of the internal structure of the first block after the outer wall of the first block of Embodiment 1 of the present invention has been made transparent, and is intended to show the oil passage structure inside the first block.

[0030] Figure 15 This is a schematic diagram of the internal structure of the negative block after the outer wall of the negative block in Embodiment 1 of the present invention has been made transparent, and is intended to show the oil passage structure inside the negative block.

[0031] Figure 16 This is a schematic diagram of the internal structure of the block after the outer wall of the block in Embodiment 1 of the present invention has been made transparent, and is intended to show the oil passage structure inside the block.

[0032] Figure 17 This is a schematic diagram of the oil circuit structure according to the working principle of Embodiment 2 of the present invention. The negative block and the positive block are virtualized and split apart in the figure to show the hole positions on their front and rear end faces at the same time; the dotted lines in the figure represent the oil circuit direction.

[0033] Figure 18This is a schematic diagram of the oil circuit structure of the second working principle of Embodiment 2 of the present invention. The negative block and the positive block are virtualized and split apart in the figure to show the hole positions on their front and rear end faces at the same time; the dotted lines in the figure represent the oil circuit direction.

[0034] Figure 19 This is a schematic diagram of the oil circuit structure of the third working principle of Embodiment 2 of the present invention. The negative block and the positive block are virtualized and split apart in the figure to show the hole positions on their front and rear end faces at the same time; the dotted lines in the figure represent the direction of the oil circuit.

[0035] Figure 20 This is a schematic diagram of the oil circuit structure of the fourth working principle of Embodiment 2 of the present invention. The negative block and the positive block are virtualized and split apart in the figure to show the hole positions on their front and rear end faces at the same time; the dotted lines in the figure represent the oil circuit direction.

[0036] The technical features in the figure correspond to the reference numerals as follows: First block 1; First block hole one 11; First block hole two 12; First block hole three 13; First block hole four 14; Elongated groove one 15; Elongated groove two 16; Mounting hole 17; Oil inlet connector 18; Tail block 2; Center plug 21; Tail block hole one 22; Tail block hole two 23; Tail block hole three 24; Tail block hole four 25; Tail block hole five 26; Tail block hole six 27; Tail block hole seven 28; Tail block hole eight 29; Threaded blind hole 201; Negative block 3; Central through hole one 31; Central through hole two 32; Side through hole three 33; Side 34. Through hole 4; 35. Inclined oil hole 1; 36. Inclined oil hole 2; 37. Inclined oil hole 3; 38. Intermediate block hole 1; 39. Intermediate block hole 2; 310. Elongated groove 3; 311. Elongated groove 4; 312. Intermediate block hole 3; 313. Intermediate block hole 4; 314. Intermediate block hole 5; 315. Horizontal oil passage; 317. Connecting oil passage; 318. Inner plug; 319. Positive block; 41. Oil outlet passage; 42. Oil outlet connector; 43. Vertical oil passage; 5. Long bolt; 6. Core cavity; 61. Piston oil cavity; 62. Valve core; 63. Neck constriction; 64. Central through hole; 65. Connecting hole. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some preferred embodiments of the present invention, and not all embodiments. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0038] Example 1; please refer to Figure 1-20This invention provides a dual-core confluence progressive distribution valve, applied in the field of centralized lubrication technology, comprising a first block 1 and a last block 2, and multiple staggered negative blocks 3 and positive blocks 4 located between the first block 1 and the last block 2; the first block 1 and the last block 2 are all connected to positive blocks 4; a pair of long bolts 5 pass through the pre-set connecting holes 65 in the middle of the first block 1, all positive blocks 4 and all negative blocks 3 and are then screwed into the pre-set threaded blind holes 201 in the last block 2, tightly pressing the first block 1, all positive blocks 4, all negative blocks 3 and the last block 2 together to form a combined valve body; the lower part of each negative block 3 and positive block 4 is provided with a core cavity 6, The piston oil chamber 6 is formed by radial expansion at both ends of the core cavity 6. A valve core 62 that can slide left and right is inserted into the core cavity 6. When the valve core 62 moves to one side, it drives the piston oil chamber 61 on that side to discharge oil. The combined valve body is provided with a main oil passage from the first block 1 to the last block 4 in the middle. The rear end of the first block 1 is provided with an oil inlet connector 18 that connects to the main oil passage. The upper part of the block 4 is provided with an oil outlet passage 41, and the end of the oil outlet passage 41 is connected to an oil outlet connector 42. The combined valve body is provided with a propulsion oil passage, which is used to drive the next valve core 62 to move to the same side after the previous valve core 62 moves to one side. The combined valve body is provided with a circulating propulsion oil passage, which is used to drive the valve core 62 on the first positive block 4 to move to the opposite side after the valve core 62 on the last positive block 4 moves to one side; the combined valve body is provided with a staggered discharge oil passage, which is used to drive the next positive block 4 to discharge oil after the valve core 62 on the previous negative block 3 moves to one side, and to drive the positive block 4 to discharge oil after the valve core 62 on the previous positive block 4 moves to one side; the combined valve body is provided with a circulating discharge oil passage, which is used to drive the oil discharged from the piston oil chamber 61 of the first positive block 4 to pass through the tail block 2 and then return to the positive block 4 for discharge after the valve core 62 on the first positive block 4 moves to one side.

[0039] The staggered arrangement refers to the arrangement where a positive block 4 is between two adjacent negative blocks 3, and a negative block 3 is between two adjacent positive blocks 4. For example, in this embodiment, the area between the first block 1 and the last block 2 includes three positive blocks 4 and two negative blocks 3. For clarity and ease of description, the direction from the first block 1 to the last block 2 is considered forward, and the left and right directions of the forward direction are left and right. The oil outlet connector 42 is a one-way valve connector to prevent backflow and ensure the reliability of the combined valve body. The front ends of the first block 1, negative block 3, and positive block 4 are all rubber ring surfaces. All holes on the rubber ring surfaces have annular grooves at their edges for installing annular rubber rings. When the long bolt 5 is tightened, all rubber rings on the rubber ring surfaces are compressed, sealing the corresponding holes on the mating surface to improve sealing.

[0040] In order to form the main oil passage, a central through hole 64 for forming the main oil passage is provided in the center of the first block 1, the positive block 4 and the negative block 3; so that each core cavity 6 is connected in parallel with the main oil passage, and the driving force of each valve core 62 can come from the pressure of the main oil passage.

[0041] Regarding the first block 1, the front face of the first block 1 has first block hole 11 and first block hole 12, as well as first block hole 3 and first block hole 4 14 on both sides; first block hole 3 13 and first block hole 11 are arranged vertically and connected through a pre-set pipe inside the first block 1; first block hole 4 14 and first block hole 2 12 are arranged vertically and connected through a pre-set pipe inside the first block 1; an elongated groove 15 and an elongated groove 2 16 are provided in the middle of the front face of the first block 1. The upper surface of the first block 1 has a pair of mounting holes 17 penetrating its bottom surface to facilitate the fixed installation of the entire combined valve body.

[0042] Regarding the negative block 3, the negative block 3 is provided with a central through hole 31 and a central through hole 32 located above the central through hole 64, and a side through hole 33 and a side through hole 4 34 located on both sides of the negative block 3; the two ends of the inclined oil hole 35 are respectively connected to the central through hole 64 and the core cavity 6; inclined oil holes 36 and 37 are respectively provided on both sides of the inclined oil hole 35; the two ends of the inclined oil holes 36 and 37 are respectively connected to the core cavity 6 and the front end face of the negative block 3; the rear end face of the negative block 3 is provided with a central block hole 38 and a central block hole 39 arranged on both sides of the central through hole 64, the central block hole 38... The ends of the intermediate block hole 39 are respectively connected to the inclined oil hole 36 and the inclined oil hole 37; the front end face of the negative block 3 located below the central through hole 64 is provided with an elongated groove 310 and an elongated groove 411; the bottom surfaces of the elongated groove 310 and the elongated groove 411 are respectively provided with intermediate block holes 312 and 413 connecting the core cavity 6; the rear end face of the negative block 3 is provided with intermediate block holes 514 and 615 respectively connecting the two piston oil cavities 61; the inclined oil hole 2 36 and the inclined oil hole 37 are respectively located on both sides of the intermediate block hole 312 and the intermediate block hole 413.

[0043] Regarding the positive block 4, except for the following differences, the other technical features of the positive block 4 are the same as those of the negative block 3; the difference between the positive block 4 and the negative block 3 is that the ends of the first intermediate block hole 38 and the second intermediate block hole 39 are not connected to the second inclined oil hole 36 and the third inclined oil hole 37, respectively (this difference can be obtained by comparing the cross-sections BB and EE in the attached drawings); the oil outlet channel 41 runs through the upper left and right sides of the positive block 4, and the two oil outlet connectors 42 are located on the left and right end faces of the positive block 4, respectively; the upper ends of the two vertical oil channels 43 are connected to the oil outlet channel 41, and their lower ends are connected to the ends of the first intermediate block hole 38 and the second intermediate block hole 39, respectively.

[0044] Regarding the tail block 2, a central plug 21 is provided at the center of the rear end face of the tail block 2 to block the central through hole 64; tail block hole 1 22 and tail block hole 23 are provided below the central plug 21, tail block hole 3 24 and tail block hole 4 25 are provided above it, and tail block hole 5 26 and tail block hole 6 27 are provided on both sides of it; tail block hole 7 28 and tail block hole 8 29 are provided on the upper two sides of the front end face of the tail block 2; the tail block 2 is provided with an internal pipe for connecting tail block hole 1 22 and tail block hole 8 29, tail block hole 23 is connected to tail block hole 7 28, tail block hole 3 24 is connected to tail block hole 6 27, and tail block hole 4 25 is connected to tail block hole 5 26.

[0045] After the combined valve body is assembled, the tail block 2 is connected to the positive block 4, multiple positive blocks 4 are connected to the negative block 3, and the last positive block 4 is connected to the tail block 2.

[0046] When the tail block 2 is connected to the main block 4, the center plug 21 is inserted into the center through hole 64 to block it; the tail block hole 1 22 and tail block hole 23 are connected to the middle block hole 4 313 and middle block hole 312 respectively; the tail block hole 3 24 and tail block hole 4 25 are connected to the middle through hole 2 32 and middle through hole 1 31 respectively; the tail block hole 5 26 and tail block hole 6 27 are connected to the inclined oil hole 3 37 and inclined oil hole 2 36 respectively; the tail block hole 7 28 and tail block hole 8 29 are connected to the side through hole 4 34 and side through hole 3 33 respectively.

[0047] When the positive block 4 and the negative block 3 are connected, the central through hole 64, the middle through hole 1 31, the middle through hole 2 32, the side through hole 3 33, and the side through hole 4 34 of the two are connected end to end; the oblique oil hole 2 36 and the oblique oil hole 3 37 of the previous block are connected to the middle block hole 1 38 and the middle block hole 2 39 of the next block respectively; the elongated groove 3 310 and the elongated groove 4 311 of the previous block are connected to the middle block hole 5 314 and the middle block hole 6 315 of the next block respectively.

[0048] When the positive block 4 is connected to the first block 1, the central through holes 64 of the two are connected end to end; the first block hole 11 and the first block hole 2 12 are connected to the middle block hole 5 314 and the middle block hole 6 315 respectively; the first block hole 3 13 and the first block hole 4 14 are connected to the side through holes 33 and 4 34 respectively; the elongated groove 15 is connected to the middle block hole 38 and the middle through hole 1 31; the elongated groove 2 16 is connected to the middle block hole 2 39 and the middle through hole 2 32.

[0049] The valve core 62 has two symmetrically spaced necked portions 63, which are used to connect the first inclined oil hole 35 with the fourth intermediate block hole 313 and the third intermediate block hole 312 when the valve core 62 moves to the right. The first inclined oil hole 35 is also connected to the third intermediate block hole 312 when the valve core 62 moves to the left, and the third inclined oil hole 37 is connected to the fourth intermediate block hole 313.

[0050] The working principle includes the following: Firstly, after one valve core 62 moves to the right, the propulsion oil passage includes a slanted oil hole 35, a core cavity 6, a central block hole 312, an elongated groove 311, a next central block hole 314, and a next piston oil cavity 61, all corresponding to that valve core 62, to drive the next valve core 62 to move to the same side. Conversely, when a valve core 62 moves to the left, it can still drive the next valve core 62 to move to the left.

[0051] Working principle two: When the valve core 62 on the last block 4 moves to the right, the circulating propulsion oil passage includes the oblique oil hole 35, core cavity 6, intermediate block hole 313, elongated groove 311, tail block hole 22, tail block hole 29, multiple side through holes 33, first block hole 13, first block hole 11, intermediate block hole 314 on the foremost block 4, and piston oil chamber 61 on the foremost block 4, so that the valve core 62 on the foremost block 4 moves to the opposite side. Conversely, when the valve core 62 on the last block 4 moves to the left, it can still drive the valve core 62 on the foremost block 4 to move to the opposite side.

[0052] Working principle three: After the valve core 62 of the previous negative block 3 moves to the right, the staggered oil discharge passage includes the middle block hole 314 corresponding to the valve core 62, the elongated groove 310 of the previous positive block 4, the middle block hole 312 of the previous positive block 4, the core cavity 6 of the previous positive block 4, the inclined oil hole 36 of the previous positive block 4, the middle block hole 38 of the current negative block 3, the middle block hole 38 of the next positive block 4, the vertical oil passage 43 of the next positive block 4, and the oil outlet passage 41 of the next positive block 4, so that the next positive block 4 can discharge oil. After the valve core 62 of the current positive block 4 is shifted to the right, the staggered oil discharge passage includes the intermediate block hole 314 corresponding to the current valve core 62, the elongated groove 310 of the previous negative block 3, the intermediate block hole 312 of the previous negative block 3, the core cavity 6 of the previous negative block 3, the oblique oil hole 36 of the previous negative block 3, the intermediate block hole 38 of the current positive block 4, the vertical oil passage 43 of the current positive block 4, and the oil outlet passage 41 of the current positive block 4, so as to allow the current positive block 4 to discharge oil. Conversely, after the valve core 62 of the current negative block 3 is shifted to the left, the next positive block 4 can discharge oil; after the valve core 62 of the current positive block 4 is shifted to the left, the current positive block 4 can discharge oil.

[0053] Working principle four: When the valve core 62 on the foremost block 4 moves to the right, the circulating oil discharge passage includes the intermediate block hole 5 314 corresponding to the current valve core 62, the first block hole 11, the first block hole 3 13, multiple side through holes 3 33, the tail block hole 8 29, the tail block hole 1 22, the intermediate block hole 3 312 of the last block 4, the core cavity 6 of the last block 4, the oblique oil hole 3 37 of the last block 4, the tail block hole 5 26, the tail block hole 4 25, multiple intermediate through holes 1 31, the elongated groove of the first block 1, the intermediate block hole 1 38 of the foremost block 4, and the vertical oil passage 43 of the foremost block 4, so that the foremost block 4 can discharge oil. Conversely, when the valve core 62 on the foremost block 4 moves to the left, the foremost block 4 can discharge oil.

[0054] Regarding the oil outlet channel 41, the oil outlet channel 41 includes blind holes one on each of the upper parts of the left and right side walls of the block 4. The blind holes one are threaded holes for the oil outlet connector 42 to be screwed onto the blind holes one. The bottom surface of the blind holes one has a horizontal oil passage 317. The ends of the two horizontal oil passages 317 are respectively connected to the two ends of a connecting oil passage 318. The inner wall of the connecting oil passage 318 is provided with internal threads, which are used to disconnect the two horizontal oil passages 317 when the inner plug 319 is threadedly connected to the connecting oil passage 318. The bottoms of the two blind holes two located at the top of the block 4 are respectively connected to the two horizontal oil passages 317. The blind holes two are threaded holes for threaded connection of blind hole plugs. A gap is left between the blind hole plug and the bottom surface of the blind hole two. When installing the inner plug 319, first remove the oil outlet connector 42 to expose the blind hole 1. Then, through the blind hole 1, the horizontal oil passage 317, and the connecting oil passage 318, insert the inner plug 319 into the connecting oil passage 318, and then reinstall the oil outlet connector 42.

[0055] To facilitate manufacturing, the negative block 3 also has the same oil outlet channel 41 as the positive block 4, improving versatility and reducing production costs. In this case, the negative block 3 can also discharge oil through the oil outlet connector 42, but this disperses the oil outlet pressure of the positive block 4, resulting in a lower oil outlet pressure. To ensure that the oil outlet pressure of the positive block 4 remains constant, the difference between the negative block 3 and the positive block 4 is that the two oil outlet connectors 42 are replaced with oil outlet plugs, sealing the oil outlet channel 41 of the negative block 3, thus ensuring that the oil outlet pressure of the positive block 4 remains constant. Therefore, it is possible to choose whether or not to install the oil outlet connector 42 on the negative block 3 as needed.

[0056] It is important to note that working principle three is a dual-core confluence working mode. The oil discharge route of negative block 3 is as follows: when the oil from negative block 3 is first transported in reverse to the core cavity 6 of the previous positive block 4, since the ends of the intermediate block hole 1 38 and intermediate block hole 2 39 of the previous positive block 4 are not connected to the inclined oil hole 2 36 and inclined oil hole 37 respectively, the oil in the core cavity 6 of that positive block 4 can only return to the core cavity 6 of the current negative block 3; thus, the oil discharged from the current negative block 3 is equivalent to entering the core cavity 6 of that negative block 3. The key point is that the oil discharged from the next positive block 4 after the negative block 3, i.e., the oil discharged from the current positive block 4, first reaches the core cavity 6 of the previous negative block 3. Therefore, the oil discharged from the current negative block 3 and the next positive block 4 are confluenced in the core cavity 6 of the current negative block 3. The key point is that the core cavity 6 of the current negative block 3 is connected to the oil outlet 41 of the next positive block 4. This core cavity 6 belongs to the low-pressure area, that is, one end of the valve core 62 of the current negative block 3 and the next positive block 4 are both connected to the low-pressure area; while when the other end of these two valve cores 62 are connected to the pressure of the main oil passage, which belongs to the high-pressure area, the high pressure can still drive the valve core 62 to move to the low-pressure area, so that the oil discharge of the current negative block 3 and the next positive block 4 merges and is discharged from the next positive block 4, that is, the dual core merging is formed, which can increase the single oil discharge volume of the oil outlet 41.

[0057] To better adjust the oil output, the valve cores 62 on the negative block 3 and the positive block 4 have different diameters, so that the oil output can meet different working requirements.

[0058] Based on this, the advantages of this embodiment are as follows: First, compared with the prior art, the number of valve blocks is greatly reduced, as are the mating surfaces and interfaces, improving sealing reliability and reducing the risk of oil leakage. Second, compared with the prior art, the combined valve body eliminates the upper and lower oil passages, with only a horizontal oil passage in the middle block. This greatly shortens the oil path, reduces the number of bends in the oil passage, minimizes pressure drop losses, and ensures smooth oil discharge. Rapid oil discharge also helps cool the combined valve body. Third, the oil discharge from the first valve block bypasses the tail block 2, quickly transferring heat to the cold end of the tail block 2. This facilitates heat dispersion in the combined valve body, preventing heat concentration at the front end and avoiding valve jamming, thus improving heat resistance and reliability. Fourth, the staggered oil discharge paths increase the single-pass oil discharge volume of one oil outlet 41 through the dual-core confluence, while also accelerating heat transfer between adjacent valve blocks, resulting in faster heat dispersion and discharge, which is beneficial for cooling.

[0059] In summary, this embodiment can achieve confluence and oil discharge of dual valve cores 62, with low pressure drop loss, smooth oil discharge, and heat dispersion of the combined valve body, thus improving heat resistance and reliability.

[0060] Example 2, please refer to Figure 1-20 .

[0061] The difference between this embodiment and Embodiment 1 lies in the number of intermediate blocks. The space between the first block 1 and the last block 2 includes two positive blocks 4 and one negative block 3, representing a minimum number of intermediate blocks. It achieves the same technical effect as Embodiment 1. However, due to the fewer positive blocks 4, there are fewer oil outlet channels 41, resulting in slower overall oil drainage compared to Embodiment 1. This leads to a decrease in the translational speed of all valve cores 62. The resulting insight is that the more intermediate blocks between the first block 1 and the last block 2, the smoother the oil drainage and the faster the movement speed of the valve cores 62.

[0062] Based on this, in other embodiments, when the number of intermediate blocks is greater than in Example 1, the oil drainage is smoother than in Example 1, and the oil drainage can carry heat more quickly, resulting in a more significant cooling effect on the combined valve body. Therefore, another advantage of the present invention is that the more intermediate blocks there are, the more oil outlets the combined valve body has, the smoother the oil drainage, the lower the temperature of the combined valve body, and the lower the risk of valve jamming.

[0063] Furthermore, to better illustrate the principle of the present invention, taking this embodiment as an example, the negative block 3 and the positive block 4 are virtually split in half and unfolded to simultaneously display the holes on their front and rear end faces in a three-dimensional structure, thereby more clearly illustrating the oil passage routing within the combined valve body. In other words, the working principle of this embodiment is the same as that of Embodiment 1, and it also possesses the aforementioned working principles one to four.

[0064] The parts of this invention not described in detail are prior art; for those skilled in the art, the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The scope of this invention is defined by the appended claims and their equivalents.

Claims

1. A progressive distribution valve for dual-core confluence, characterized in that: It includes a first block (1) and a tail block (2), as well as a number of staggered negative blocks (3) and positive blocks (4) located between the first block (1) and the tail block (2); the positive blocks (4) are connected to the first block (1) and the tail block (2); a pair of long bolts (5) pass through the pre-set connecting holes (65) in the middle of the first block (1), all positive blocks (4) and all negative blocks (3) and are screwed into the pre-set threaded blind hole (201) of the tail block (2) to tightly press the first block (1), all positive blocks (4), all negative blocks (3) and tail block (2) together to form a combined valve body; the lower part of the negative blocks (3) and the positive blocks (4) are provided with core cavities (6), and the two ends of the core cavities (6) are radially expanded to form piston oil cavities (61). A valve core (62) that can slide left and right is inserted into the core cavity (6) for driving the piston oil cavity (61) on that side to discharge oil when the valve core (62) moves to one side; The combined valve body is provided with a main oil passage from the first block (1) to the last block (4) in the middle; the rear end of the first block (1) is provided with an oil inlet connector (18) that connects to the main oil passage; the upper part of the block (4) is provided with an oil outlet passage (41), and the end of the oil outlet passage (41) is connected to an oil outlet connector (42). The combined valve body is provided with a propulsion oil passage, which is used to drive the next valve core (62) to move to the same side after the previous valve core (62) has moved to one side; The combined valve body is provided with a circulating propulsion oil passage, which is used to drive the valve core (62) on the first block (4) to move to the opposite side after the valve core (62) on the last block (4) moves to one side; The combined valve body is provided with staggered oil discharge channels, which are used to drive the next positive block (4) to discharge oil after the valve core (62) of the current negative block (3) is moved to one side, and to drive the positive block (4) to discharge oil after the valve core (62) of the current positive block (4) is moved to one side. The combined valve body is provided with a circulating discharge oil passage, which is used to drive the oil discharged from the piston oil chamber (61) of the first block (4) to pass through the tail block (2) and then return to the block (4) for discharge after the valve core (62) on the first block (4) moves to one side.

2. The progressive distribution valve for dual-core confluence according to claim 1, characterized in that: A central through hole (64) for forming the main oil passage is provided in the center of the first block (1), the positive block (4) and the negative block (3); The front face of the first block (1) is provided with first block hole one (11) and first block hole two (12), as well as first block hole three (13) and first block hole four (14) on both sides; first block hole three (13) and first block hole one (11) are arranged vertically and connected through a pre-set pipe in the first block (1); first block hole four (14) and first block hole two (12) are arranged vertically and connected through a pre-set pipe in the first block (1); oblong groove one (15) and oblong groove two (16) are provided in the middle of the front face of the first block (1). The negative block (3) is provided with a central through hole one (31) and a central through hole two (32) located above the central through hole (64), and a side through hole three (33) and a side through hole four (34) located on both sides of the negative block (3); the two ends of the inclined oil hole one (35) are connected to the central through hole (64) and the core cavity (6); the two sides of the inclined oil hole one (35) are provided with inclined oil hole two (36) and inclined oil hole three (37); the two ends of the inclined oil hole two (36) and inclined oil hole three (37) are connected to the core cavity (6) and the front end face of the negative block (3); the rear end face of the negative block (3) is provided with a central block hole one (38) and a central block hole two (39) arranged on both sides of the central through hole (64), the central block hole one (38) and the central block hole two (39) are provided with the central through hole one (38) and the central through hole two (39) located on both sides of the central through hole (64), the central block hole one (38) and the central through hole two (39) are provided with the central through hole one (38) and the central through hole two (39) are provided with the central through hole (64 ... The ends of the intermediate block hole 2 (39) are respectively connected to the inclined oil hole 2 (36) and the inclined oil hole 3 (37); the front end face of the negative block (3) located below the central through hole (64) is provided with an elongated groove 3 (310) and an elongated groove 4 (311); the bottom surfaces of the elongated groove 3 (310) and the elongated groove 4 (311) are respectively provided with intermediate block hole 3 (312) and intermediate block hole 4 (313) connecting the core cavity (6); the rear end face of the negative block (3) is provided with intermediate block hole 5 (314) and intermediate block hole 6 (315) respectively connecting the two piston oil cavities (61); the inclined oil hole 2 (36) and the inclined oil hole 3 (37) are respectively located on both sides of the intermediate block hole 3 (312) and the intermediate block hole 4 (313); Except for the following differences, the positive block (4) is the same as the negative block (3) in all other technical features; the difference between the positive block (4) and the negative block (3) is that the ends of the first intermediate block hole (38) and the second intermediate block hole (39) are not connected to the second inclined oil hole (36) and the third inclined oil hole (37) respectively; the oil outlet channel (41) runs through the upper left and right sides of the positive block (4), and the two oil outlet connectors (42) are located on the left and right end faces of the positive block (4) respectively; the upper ends of the two vertical oil channels (43) are connected to the oil outlet channel (41), and their lower ends are connected to the ends of the first intermediate block hole (38) and the second intermediate block hole (39) respectively; The tail block (2) has a central plug (21) at the center of its rear end face to block the central through hole (64); the central plug (21) has a tail block hole one (22) and a tail block hole two (23) below it, a tail block hole three (24) and a tail block hole four (25) above it, and a tail block hole five (26) and a tail block hole six (27) on its sides; the tail block (2) has a tail block hole seven (28) and a tail block hole eight (29) on its upper sides respectively; the tail block (2) has an internal pipe for connecting the tail block hole one (22) and the tail block hole eight (29), the tail block hole two (23) is connected to the tail block hole seven (28), the tail block hole three (24) is connected to the tail block hole six (27), and the tail block hole four (25) is connected to the tail block hole five (26); When the tail block (2) is connected to the main block (4), the center plug (21) is inserted into the center through hole (64) to block it; the tail block hole one (22) and tail block hole two (23) are connected to the middle block hole four (313) and middle block hole three (312) respectively; the tail block hole three (24) and tail block hole four (25) are connected to the middle through hole two (32) and middle through hole one (31) respectively; the tail block hole five (26) and tail block hole six (27) are connected to the inclined oil hole three (37) and inclined oil hole two (36) respectively; the tail block hole seven (28) and tail block hole eight (29) are connected to the side through hole four (34) and side through hole three (33) respectively. When the positive block (4) and the negative block (3) are connected, the central through hole (64), the middle through hole one (31), the middle through hole two (32), the side through hole three (33), and the side through hole four (34) of the two are connected end to end; the oblique oil hole two (36) and oblique oil hole three (37) of the previous block are connected to the middle block hole one (38) and the middle block hole two (39) of the next block respectively; the elongated groove three (310) and elongated groove four (311) of the previous block are connected to the middle block hole five (314) and the middle block hole six (315) of the next block respectively. When the positive block (4) is connected to the first block (1), the central through holes (64) of the two are connected end to end; the first block hole one (11) and the first block hole two (12) are connected to the middle block hole five (314) and the middle block hole six (315) respectively; the first block hole three (13) and the first block hole four (14) are connected to the side through holes three (33) and the side through holes four (34) respectively; the elongated groove one (15) is connected to the middle block hole one (38) and the middle through hole one (31); the elongated groove two (16) is connected to the middle block hole two (39) and the middle through hole two (32). The valve core (62) has two symmetrical necked portions (63) for communicating with the first inclined oil hole (35) and the fourth intermediate block hole (313) when the valve core (62) moves to the right, and for communicating with the third intermediate block hole (312) when the valve core (62) moves to the left.

3. The progressive distribution valve for dual-core confluence according to claim 2, characterized in that: After the current valve core (62) is moved to the right, the circulating propulsion oil passage includes a first inclined oil hole (35), a core cavity (6), a fourth intermediate block hole (313), a fourth elongated groove (311), a sixth next intermediate block hole (315), and a sixth next piston oil cavity (61) corresponding to the valve core (62), so as to drive the next valve core (62) to move to the same side; When the valve core (62) on the last block (4) moves to the right, the circulating oil passage includes an inclined oil hole (35) corresponding to the valve core (6), a core cavity (6), a middle block hole (313), an elongated groove (311), a tail block hole (22), a tail block hole (29), multiple side through holes (33), a first block hole (13), a first block hole (11), a middle block hole (314) on the first block (4), and a piston oil chamber (61) on the first block (4), so that the valve core (62) on the first block (4) moves to the opposite side; After the valve core (62) of the current negative block (3) is shifted to the right, the staggered oil discharge passage includes the middle block hole five (314) corresponding to the valve core (62), the elongated groove three (310) of the previous positive block (4), the middle block hole three (312) of the previous positive block (4), the core cavity (6) of the previous positive block (4), the inclined oil hole two (36) of the previous positive block (4), the middle block hole one (38) of the current negative block (3), the middle block hole one (38) of the next positive block (4), the vertical oil passage (43) of the next positive block (4), and the oil outlet passage (41) of the next positive block (4), so that... The next positive block (4) drains oil; after the valve core (62) of the current positive block (4) moves to the right, the staggered oil discharge channel includes the middle block hole five (314) corresponding to the current valve core (62), the elongated groove three (310) of the previous negative block (3), the middle block hole three (312) of the previous negative block (3), the core cavity (6) of the previous negative block (3), the inclined oil hole two (36) of the previous negative block (3), the middle block hole one (38) of the current positive block (4), the vertical oil passage (43) of the current positive block (4), and the oil outlet passage (41) of the current positive block (4), so that the current positive block (4) drains oil; When the valve core (62) on the first block (4) moves to the right, the circulating discharge oil passage includes the middle block hole five (314) corresponding to the current valve core (62), the first block hole one (11), the first block hole three (13), multiple side through holes three (33), the tail block hole eight (29), the tail block hole one (22), the middle hole three of the last block (4), the core cavity (6) of the last block (4), the oblique oil hole three (37) of the last block (4), the tail block hole five (26), the tail block hole four (25), multiple middle through holes one (31), the long oval groove of the first block (1), the middle block hole one (38) of the first block (4), the vertical oil passage (43) of the first block (4) and the oil outlet passage (41), so that the first block (4) discharges oil.

4. The progressive distribution valve for dual-core confluence according to claim 2, characterized in that: The oil outlet channel (41) includes blind holes one on the upper part of the left and right side walls of the block (4), and the blind holes one is a threaded hole for the oil outlet connector (42) to be screwed onto the blind holes one; the bottom surface of the blind holes one is open to the horizontal oil passage (317), and the ends of the two horizontal oil passages (317) are respectively connected to the two ends of a connecting oil passage (318); the inner wall of the connecting oil passage (318) is provided with internal threads, which are used to disconnect the two horizontal oil passages (317) when the inner plug (319) is threadedly connected to the connecting oil passage (318); the bottom of the two blind holes two opened at the top of the block (4) are respectively connected to the two horizontal oil passages (317); the blind holes two is a threaded hole for threaded connection of the blind hole plug, and a gap is left between the blind hole plug and the bottom surface of the blind hole two.

5. The progressive distribution valve for dual-core confluence according to claim 4, characterized in that: The negative block (3) also has the same oil outlet channel (41) as the positive block (4).

6. The progressive distribution valve for dual-core confluence according to claim 1, characterized in that: The oil outlet connector (42) is a one-way valve connector.

7. The progressive distribution valve for dual-core confluence according to claim 1, characterized in that: The front ends of the first block (1), the negative block (3) and the positive block (4) are all rubber ring surfaces, and annular grooves are provided at the edges of all holes on the rubber ring surfaces for installing annular rubber rings.

8. The progressive distribution valve for dual-core confluence according to claim 1, characterized in that: The first block (1) has a pair of mounting holes (17) on its upper surface that penetrate its bottom surface.

9. The progressive distribution valve for dual-core confluence according to claim 1, characterized in that: The first block (1) and the last block (2) include two positive blocks (4) and one negative block (3).

10. The progressive distribution valve for dual-core confluence according to claim 1, characterized in that: The valve cores (62) on the negative block (3) and the positive block (4) have different diameters.

Images