Improved compact column type double-line metering method and device

Abstract

The invention relates to an improved compact column type double-line metering method and device. The device comprises a mounting seat; a plurality of oil injector assemblies are arranged on the mounting seat; the oil injector assembly comprises an oil injector valve body; a metering cavity X and a control cavity Y are respectively arranged in the oil injector valve body; a metering plunger is arranged in the metering cavity X; a reversing plunger is arranged in the control cavity Y; an outlet joint body is arranged at the other port of the metering cavity X; an outlet one-way valve is arranged in the outlet joint body; the device is reasonable in design, compact in structure and convenient to use.

Description

Technical Field

[0001] This invention relates to the field of grease metering and dispensing, and more particularly to a dual-line centralized lubrication system with precise displacement control, especially an improved compact column-type dual-line metering method and device. Background Technology

[0002] Most dual-line distributors are either block-type integral structures or block-disc structures, resulting in a relatively large overall size. The integral structure is inconvenient for on-site expansion, maintenance, and adjustment; the block-disc structure, due to its modular design, suffers from sealing leakage issues and remains relatively large. A small number use a column-type structure. In this type, the reversing plunger and metering plunger use O-ring-like sealing materials to isolate the oil chamber, which can meet functional requirements to a certain extent. However, with continued use, the seals (which are dynamic seals) will quickly fail, leading to functional loss.

[0003] In addition, the applicant pointed out that during long-term use, the measuring device will experience wear and cavitation, and the lubricating grease will be sprayed onto the precision lubrication position. Over time, wear and tear will accumulate iron filings, which will damage the worn parts.

[0004] Existing technical problems include the large size of conventional block-type dual-line distributors and unstable sealing function, as well as the unstable sealing function of conventional column-type dual-line distributors and the large amount of iron filings entering. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an improved compact column-type double-line metering method and device.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows: An improved compact column-type dual-line metering method, based on a metering device; the method includes the following steps; Step S1: Oil is introduced into port A to build up pressure; oil is returned to port B to release pressure. In step S2, when the reversing plunger contacts the mounting seat, the oil circuit F opens, and grease enters the cavity T of the metering plunger from the oil circuits E and F, pushing the metering plunger to move towards the mounting seat; at this time, the grease in the cavity W of the metering plunger enters the gap groove H through the oil circuit G, and then enters the oil circuits J and K, and then enters the outlet check valve, and finally reaches the lubrication point. In step S3, A-line continues to build pressure. Once the set pressure is reached, the lubrication pump or reversing valve reverses the flow, switching oil line A from oil inlet to oil return for pressure relief, and oil line B from oil return to oil inlet for pressure building. In step S4, after the reversing plunger moves to the reversing plunger plug position, the oil circuit G is opened, and the grease enters the cavity W from the oil circuit G, pushing the metering plunger to move outward, compressing the cavity T and pushing the grease to the oil circuit F, and through the gap groove H, it enters the oil circuit J and oil circuit K, and then enters the outlet check valve, and finally reaches the lubrication point position, completing one working cycle.

[0007] As a further improvement to the above technical solution: In step S1, when oil enters through port A, it passes through oil passage groove C and enters oil passages M, D and E in sequence, pushing the reversing plunger to move towards the mounting seat. The grease enters the cavity R and compresses the cavity S until the reversing plunger contacts the mounting seat. The grease in the cavity S flows to the lubrication pump return port B to release pressure. In step S3, the grease from channel B enters cavity S, pushing the reversing plunger to move to the outer cavity R. The grease in cavity R flows out to port A, completing the pressure relief.

[0008] An improved compact column-type dual-line metering device includes a mounting base; a plurality of injector assemblies are disposed on the mounting base; The lubricator assembly includes the lubricator valve body; A metering chamber X and a control chamber Y are respectively provided in the oil injector valve body; A metering plunger is installed in metering chamber X; A reversing plunger is installed in the control cavity Y; An outlet connector is provided at the other port of the metering chamber X; An outlet check valve is installed in the outlet connector body.

[0009] As a further improvement to the above technical solution: A reversing plunger plug is provided at the Y port of the control cavity; A metering plunger plug is installed at port X of the metering chamber; An oil passage groove C is provided on the end face of the metering plunger plug.

[0010] A sealing gasket is provided between the mounting base and the injector valve body.

[0011] The injector valve body includes a plug; an O-ring and retaining rings on both sides of the O-ring are provided on the sealing layer of the plug; The plug makes sealed contact with the metering chamber X.

[0012] The outlet connector body has an outlet hole; The outlet check valve includes a cone spring and a steel ball connected in place; The cone spring and steel ball are installed in the outlet hole; A retaining ring O-ring set is provided at the end of the outlet connector body for insertion into the metering chamber X.

[0013] A threaded stop is provided in the inner cavity of the outlet hole; An adjusting nut is threaded into the threaded stop. The adjusting nut has a central through hole. An entry annular cavity is provided in the central through-hole section; An annular groove is provided on the stepped surface leading into the annular cavity; The annular groove is connected by several connecting channels; An inner protruding ring is provided on the inner wall of the step surface of the entrance annular cavity; The inner protruding ring is higher than the step surface entering the ring cavity; Several guide magnetic grids are distributed on the step surface of the entrance ring cavity.

[0014] The front end of the guide magnetic grid plate extends into the central through hole.

[0015] Process protrusions are provided on the back of the adjusting nut.

[0016] The mounting base is provided with inlet and outlet stops; the inlet and outlet stops have a bottom surface and an annular groove. The mounting base is equipped with oil ports A and B, oil passage V, oil passage B, and oil passage A. Oil inlets A and B are set in the same direction; oil circuit A and oil circuit B are set in the same direction; Oil port A, oil passage V, and oil passage A are connected sequentially and arranged perpendicularly to each other; Oil port B is connected to oil line B and is set perpendicular to each other; B-path oil circuit connects to the annular groove; The A-line oil circuit is isolated from the annular groove.

[0017] Oil passage C is connected to oil passage A; An oblique oil passage M is provided on the oil injector valve body, which is connected to the oil passage groove C; An oil passage D, which is connected to the oblique oil passage M, is provided on the axial side of the oiler valve body; Oil passage E is horizontally connected above oil passage D; Oil circuit E is connected to cavity R at the outer end of control cavity Y; The control cavity Y has cavities R and S at both ends; There is a gap groove H between the middle of the control cavity Y and the reversing plunger body; The gap groove H is spaced apart from the cavities R and S on both sides; The cavity S at the inner end of the control cavity Y is connected to the annular groove. The gap groove H is connected to the oil passage P; The metering cavity X has cavities T and W located on both sides of the metering plunger, inside and outside. Oil passages F and H are provided in the oiler valve body; Oil passage F is isolated from cavity W, and oil passage G is isolated from cavity T; When the reversing plunger is on the outside, oil passage G is connected to cavity S, and oil passage F is cut off from cavity R; clearance groove H is connected to through oil passage F; When the reversing plunger is on the inner side, the oil passage G is cut off from the cavity S, and the oil passage F is connected to the cavity R; the clearance groove H is connected to the through oil passage G. A process expansion hole is provided at the X end of the metering chamber, which is used for oil circuit F to communicate with chamber T through a gap, and for oil circuit G to communicate with chamber W through a gap; Interconnected oil passages K and J are provided on the oiler valve body; Oil circuit P is connected to oil circuit J; An outlet connector is sealed at the outer end of the metering chamber X. Oil passages Q and Z are radially interconnected within the outlet connector body; Oil circuit K connects to oil circuit Q; A one-way valve is installed at the Z-outlet of the oil circuit for one-way sealing. An annular groove communicating with oil circuit Q is provided on the outlet connector body; The port of the metering cavity X has an elongated protrusion; The sealing gasket is fitted onto the extended protrusion; The sealing gasket has a top sealing surface; on the inner and outer sides of the top sealing surface, there are inner sealing surfaces and outer sealing bevels, respectively; The outer sealing bevel is in pressure contact with the outer wall of the extended protrusion; The inner sealing surface is in pressure contact with the inner wall of the annular groove. The top sealing surface is in pressure contact with the bottom surface of the annular groove.

[0018] This invention adopts a column-type dual-line oil injector structure; the plunger and the orifice are honed together (no O-ring auxiliary seal required); it has high working pressure; and its structure has high reliability, ensuring low-resistance adsorption of iron filings. This invention enables continuous drainage, avoiding idle flow.

[0019] Compared with the traditional structure, the present invention improves the oil passage on both sides of the two oil ports to form a three-seal system of annular groove + eccentric + central + three vertical direction change + sealing gasket. This achieves a high degree of integration of the oil inlet and outlet passages, while ensuring smooth oil passage and avoiding wear of the sealing ring due to pressure changes caused by frequent switching of oil inlet and outlet.

[0020] This invention has strong wear resistance and pressure resistance; it reduces the amount of wear entering the lubrication part, can ensure the injection pressure, can achieve a certain amount of adsorption of iron powder, and is convenient for replacement and maintenance. Attached Figure Description

[0021] Figure 1These are schematic diagrams of three different usage structures of the oiler assembly of the present invention.

[0022] Figure 2 This is a schematic diagram of the metering plunger structure of the present invention.

[0023] Figure 3 This is a schematic diagram of the mounting base structure of the present invention.

[0024] Figure 4 This is a schematic diagram of the internal structure of the plug of the present invention.

[0025] Figure 5 This is a schematic diagram of the outlet connector structure of the present invention.

[0026] Figure 6 This is a schematic diagram of the oil inlet A port of the present invention in use.

[0027] Figure 7 This is a schematic diagram of the reversing plunger in the reversing state of the present invention.

[0028] Figure 8 This is a schematic diagram of the continued pressure build-up state of the A-path of the present invention.

[0029] Figure 9 This is a schematic diagram of the oil circuit G in the present invention in the on-state state.

[0030] Figure 10 This is a schematic diagram of the adjusting nut component of the present invention.

[0031] The components include: 1. Lubricator assembly; 2. Mounting base; 3. Lubricator valve body; 4. Metering plunger; 5. Reversing plunger; 6. Reversing plunger plug; 7. Metering plunger plug; 8. Outlet check valve; 9. Sealing gasket; 10. Plug; 11. O-ring; 12. Retaining ring; 13. Outlet connector body; 14. Conical spring; 15. Steel ball; 16. Retaining ring / O-ring assembly; 17. Threaded stop; 18. Adjusting nut. ; 19. Central through hole; 20. Inner raised ring; 21. Guide magnetic grid plate; 22. Process protrusion; 23. Ring groove; 24. Connecting channel; 25. Entering ring cavity; 26. B-path oil passage; 27. A-path oil passage; 28. Outlet hole; 29. ​​Ring groove; 30. Bottom surface; 31. Inlet and outlet stops; 32. Extended protrusion; 33. Outer sealing bevel; 34. Top sealing surface; 35. Inner sealing surface. Detailed Implementation

[0032] like Figure 1-10 As shown, the improved compact column-type dual-line metering device of this embodiment includes a mounting base 2, which can adopt an existing structural shape; a plurality of oil injector assemblies 1 are provided on the mounting base 2, which can be one or more sets; The lubricator assembly 1 includes a lubricator valve body 3; its structure is smaller than that of existing systems.

[0033] A metering chamber X and a control chamber Y are respectively provided in the oil injector valve body 3; thereby realizing guided drainage.

[0034] A metering plunger 4 is installed in the metering chamber X. Compared with the traditional structure, it has been improved by connecting the outlet to the rod chamber, thereby shortening the stroke and reducing the volume.

[0035] A reversing plunger 5 is provided in the control cavity Y; the piston heads at both ends of the reversing plunger 5 of the present invention have different lengths, thereby avoiding resonance during reversal. An outlet connector body 13 is provided at the other end of the metering chamber X; it adopts a honing hole to simplify the structure.

[0036] An outlet check valve 8 is provided in the outlet connector body 13.

[0037] A reversing plunger plug 6 is provided at the Y port of the control cavity for easy inspection and maintenance.

[0038] A metering plunger plug 7 is provided at one port of the metering chamber X to achieve sealing and isolation.

[0039] An oil passage groove C is provided on the end face of the metering plunger plug 7 to increase the flow rate.

[0040] To complement the improvements of this invention, a sealing gasket 9 is provided between the mounting base 2 and the oil injector valve body 3, thereby achieving isolation and sealing between the A and B paths.

[0041] The injector valve body 3 includes a plug 10; an O-ring 11 and retaining rings 12 on both sides of the O-ring 11 are provided on the sealing layer of the plug 10. The plug 10 makes sealed contact with the metering chamber X. This separates circuit A from the metering chamber X, thereby achieving a reversed oil circuit.

[0042] The outlet connector body 13 has an outlet hole 28 to enable the output of grease.

[0043] The outlet check valve 8 includes a cone spring 14 and a steel ball 15 connected together. A conical spring 14 and a steel ball 15 are disposed in the outlet hole 28 to achieve a one-way seal.

[0044] A retaining ring O-ring group 16 is provided at the end of the outlet connector body 13 for insertion into the metering chamber X, thereby realizing the isolation and reversal of the metering chamber X from the oil discharge circuit.

[0045] As a complementary and innovative improvement, this design aims to achieve a rational flow channel design, thereby facilitating alignment and assembly, and promoting smooth circulation. An inlet / outlet stop 31 is provided in the mounting base 2; the inlet / outlet stop 31 has a bottom surface 30 and an annular groove 29.

[0046] Oil ports A and B, oil passage V, oil passage B 26, and oil passage A 27 are respectively provided in the mounting base 2; Oil inlets A and B are set in the same direction; oil line 27 in line A and oil line 26 in line B are set in the same direction. Oil port A, oil line V, and oil line 27 of line A are connected in sequence and set perpendicular to each other; Oil port B is connected to oil line 26 in line B, and they are set perpendicular to each other; B-path oil passage 26 connects to annular groove 29; The A-line oil passage 27 is isolated from the annular groove 29.

[0047] Oil passage C is connected to oil passage 27 of passage A; An oblique oil passage M connected to the oil passage groove C is provided on the oil injector valve body 3; An oil passage D, which is connected to the oblique oil passage M, is provided on the axial side of the oiler valve body 3; Oil passage E is horizontally connected above oil passage D; Oil circuit E is connected to cavity R at the outer end of control cavity Y; The control cavity Y has cavities R and S at both ends; There is a gap groove H between the middle of the control cavity Y and the reversing plunger 5; The gap groove H is spaced apart from the cavities R and S on both sides; The cavity S at the inner end of the control cavity Y is connected to the annular groove 29; The gap groove H is connected to the oil passage P; The metering cavity X has cavities T and W located on the outer and inner sides of the metering plunger 4; Oil passages F and H are provided in the oiler valve body 3; Oil passage F is isolated from cavity W, and oil passage G is isolated from cavity T; Through the above reasonable design, the oil inlet and outlet circuits and the metering circuit are coaxially arranged, while the control circuit and the discharge circuit are eccentrically arranged. This greatly simplifies and saves on the structure.

[0048] When the reversing plunger 5 is on the outside, the oil passage G is connected to the cavity S, and the oil passage F is cut off from the cavity R; the clearance groove H is connected to the through oil passage F. When the reversing plunger 5 is on the inner side, the oil passage G is cut off from the cavity S, and the oil passage F is connected to the cavity R; the clearance groove H is connected to the through oil passage G. To reduce oil trapping, achieve better metering, and reduce volume, the metering piston adopts a short shaft design, which reduces resistance and allows for flexible reversing. It uses a gap seal, which is more robust and durable than traditional sealing ring structures, less prone to jamming, and reduces maintenance.

[0049] A process expansion hole is provided at the X end of the metering chamber, which is used for oil circuit F to communicate with chamber T through a gap, and for oil circuit G to communicate with chamber W through a gap; Interconnected oil passages K and J are provided on the oiler valve body 3; Oil circuit P is connected to oil circuit J; An outlet connector body 13 is sealed at the outer end of the metering chamber X; Oil passages Q and Z are radially interconnected in the outlet connector body 13; Oil circuit K connects to oil circuit Q; An outlet check valve 8 is installed to block the one-way blockage at the Z outlet of the oil circuit; This invention achieves the isolation of the inlet and outlet oil passages by the sealing gasket. Due to its extremely compact structure, traditional sealing rings are easily damaged by pressure difference changes during frequent high and low pressure switching, leading to internal leakage. This invention cleverly solves the above problems by using a three-stage method.

[0050] The present invention provides a common inlet and outlet stop 31 for oil inlets and outlets A and B, which makes full use of the space of the inlet and outlet stop 31. This is a major improvement, which simplifies the structure, makes full use of space, and facilitates processing and assembly.

[0051] An annular groove communicating with oil passage Q is provided on the outlet connector body 13; The port of the metering chamber X has an elongated protrusion 32; it is preferably part of the injector valve body 3. This provides support for the sealing portion.

[0052] The sealing gasket 9 is fitted onto the extended protrusion 32; The sealing gasket 9 has a top sealing surface 34; and on the inner and outer sides of the top sealing surface 34 are an inner sealing surface 35 and an outer sealing bevel 33, respectively. The outer sealing bevel 33 is in pressure contact with the outer wall of the elongated protrusion 32; The inner sealing surface 35 is in pressure contact with the inner sidewall of the annular groove 29; The top sealing surface 34 is in pressure contact with the bottom surface of the annular groove 29.

[0053] It achieves separation of path A and path B, and utilizes the elasticity of the sealing gasket to achieve full contact. At the same time, the inclined surface is used to avoid damage, and the fluctuation of internal and external pressure difference does not affect the sealing gasket. It achieves pre-sealing through the outer sealing inclined surface 33 and the inner sealing surface 35, and achieves self-sealing by increasing extrusion pressure through the inclined surface. The top sealing surface 34 achieves high-pressure sealing in the middle.

[0054] like Figure 1-10 As shown, the improved compact column-type dual-line metering device of this embodiment includes an adjusting nut 18 threadedly connected in the threaded stop 17. The adjusting nut 18 has a central through hole 19, thereby enabling smooth grease output.

[0055] An entry annular cavity 25 is provided in the central through hole 19; thereby achieving pressure variation diffusion, allowing some grease to enter and adsorbing the iron powder contained in the grease.

[0056] An annular groove 23 is provided on the step surface of the entrance annular cavity 25 to achieve arc-shaped aggregation.

[0057] The annular groove 23 is connected to several connecting channels 24, enabling focused spraying.

[0058] An inner protruding ring 20 is provided on the inner wall of the step surface of the entrance annular cavity 25; this partially blocks the flow of iron dust and prevents it from accumulating.

[0059] The inner protruding ring 20 is higher than the stepped surface of the entering ring cavity 25; Several guide magnetic grid plates 21 are distributed on the stepped surface of the entering annular cavity 25; they guide the grease into the grease and perform low-resistance adsorption of the grease.

[0060] The front end of the guide magnetic grid plate 21 extends into the central through hole 19; A process protrusion 22 is provided on the back of the adjusting nut 18.

[0061] like Figure 1 The mounting base provided in this embodiment can be made in various specifications and can be equipped with 1-16 oilers, such as oilers arranged on both sides, or oilers arranged on one side.

[0062] like Figure 2 This is the internal structure of the dual-line oiler.

[0063] like Figure 3 Oil port A and oil port B, when A is the oil inlet of the oiler, B will be the oil return port of the oiler; when A is the oil return port of the oiler, A will be the oil inlet of the oiler.

[0064] like Figure 4 C is the oil passage groove, and its seal adopts a retaining ring + O-ring to achieve double-sided pressure sealing and avoid damage to the seal when it is under pressure on one side.

[0065] like Figure 5 It uses a retaining ring + O-ring to achieve double-sided pressure sealing, avoiding damage to the seal when it is under pressure on one side; the connector is equipped with a steel ball and a cone spring to realize the function of an outlet check valve.

[0066] As a working principle, such as Figure 6 Oil enters through port A to build up pressure; oil returns through port B to release pressure.

[0067] When oil enters through port A, it passes through the oil passage groove C of the metering plunger plug 10 and enters oil passages D and E in sequence, pushing the reversing plunger 5 to move towards the mounting seat 2 until the left side of the reversing plunger 5 contacts the mounting seat 2. At this time, the grease near the mounting seat end of the reversing plunger 5 flows to the lubrication pump return port, and the pressure on this side is released.

[0068] like Figure 7 When the left side of the reversing plunger 5 contacts the mounting seat, the oil passage F is opened, and the grease enters the front end of the metering plunger 4 from the oil passage F, pushing the metering plunger 4 to move towards the mounting seat 2. At this time, the grease at the rear end of the metering plunger 4 enters the gap groove H of the metering plunger 4 through the oil passage G, and then enters the oil passage J and oil passage K, and then enters the outlet check valve through the hole L, and then reaches the lubrication point.

[0069] like Figure 8 If pressure is built up in channel A, and the set pressure is reached, the lubrication pump or the reversing valve will switch the direction. Channel A will switch from the oil inlet to the oil return port to release pressure, and channel B will switch from the oil return port to the oil inlet to build up pressure.

[0070] Grease from path B enters the rear end of the reversing plunger 5 (near the mounting seat), pushing the reversing plunger to move outward. The grease on the outside of the reversing plunger flows out to the lubrication pump return port, completing the pressure relief, and moves to the reversing plunger plug position.

[0071] like Figure 9 After the reversing plunger 5 moves to the reversing plunger plug position, the oil circuit G is opened. The grease enters the rear end of the metering plunger from the oil circuit G, pushing the metering plunger to move outward, pushing the grease at the front end of the metering plunger to the oil circuit F, and through the metering plunger gap groove H, it enters the oil circuit J and oil circuit K, and then enters the outlet check valve through the hole L, and finally reaches the lubrication point position, completing one working cycle.

[0072] Oil circuit A and oil circuit B are isolated and sealed by a gasket, and the two oil circuits do not interfere with each other and operate independently. In one working cycle, each oil outlet completes two grease discharges.

[0073] Metering plungers can be made in various specifications to meet pumping requirements of different displacements.

[0074] like Figure 10 As an improvement.

[0075] The present invention has been described in detail for the purpose of making the disclosure clearer, and the prior art will not be listed in detail.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. It is obvious to those skilled in the art that multiple technical solutions of the present invention can be combined. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. All technical contents not described in detail in the present invention are well-known technologies.

Claims

1. An improved compact columnar bivariate metrology method, characterized by: Metering device based on metering device; method The method comprises the following steps: Step S1, oil inlet A builds pressure; oil return B releases pressure; Step S2, when the reversing plunger (5) contacts the mounting seat (2), the oil path F is opened, the grease enters the cavity T of the metering plunger (4) from the oil paths E and F, and pushes the metering plunger (4) to move towards the mounting seat (2); at this time, the grease in the cavity W of the metering plunger (4) enters the gap groove H through the oil path G, and then enters the oil path J and the oil path K, and then enters the outlet one-way valve (8), and then reaches the lubrication point position; Step S3, A continues to build pressure, and when the set pressure is reached, the lubricating pump or the reversing valve is reversed, the oil path A is switched from oil inlet to oil return pressure relief, and the oil path B is switched from oil return to oil inlet pressure building; Step S4, after the reversing plunger (5) moves to the position of the reversing plunger plug (6), the oil path G is opened, the grease enters the cavity W from the oil path G, pushes the metering plunger (4) to move outward, compresses the cavity T and pushes the grease to the oil path F, and then enters the oil path J and the oil path K through the gap groove H, and then enters the outlet one-way valve (8), and then reaches the lubrication point position, completing a working cycle.

2. The improved compact column type double-line metering device according to claim 1, characterized in that: In step S1, when the oil inlet A builds pressure, the oil path groove C enters the oil paths M, D and E in sequence, pushes the reversing plunger (5) to move towards the mounting seat (2), the grease enters the cavity R, compresses the cavity S, and until the reversing plunger (5) contacts the mounting seat (2), the grease in the cavity S flows to the lubricating pump return port B for pressure relief; In step S3, the oil path B enters the cavity S, pushes the reversing plunger (5) to move to the cavity R on the outside, the grease in the cavity R flows out of the A oil port, and the pressure relief is completed; When the reversing plunger (5) is located on the outside, the oil path G is in communication with the cavity S, and the oil path F is cut off from the cavity R; the gap groove H is in communication with the oil path F; When the reversing plunger (5) is located on the inside, the oil path G is cut off from the cavity S, and the oil path F is in communication with the cavity R; the gap groove H is in communication with the oil path G.

3. An improved compact columnar dual-line metering device characterized by: The device comprises a mounting seat (2); a plurality of oil injector assemblies (1) are arranged on the mounting seat (2); The oil injector assembly (1) comprises an oil injector valve body (3); The oil injector valve body (3) is provided with a metering cavity X and a control cavity Y; The metering cavity X is provided with a metering plunger (4); The control cavity Y is provided with a reversing plunger (5); An outlet connector body (13) is arranged at the other port of the metering cavity X.

4. The improved compact column dual wire metering device of claim 3, wherein: A reversing plunger plug (6) is arranged at the port of the control cavity Y for executing the claim 1; A metering plunger plug (7) is arranged at one port of the metering cavity X; An oil path groove C is arranged on the end face of the metering plunger plug (7); A sealing gasket (9) is arranged between the mounting seat (2) and the oil injector valve body (3); the oil injector valve body (3) comprises a plug (10); an O-ring (11) and a retainer ring (12) on both sides of the O-ring (11) are arranged on the sealing layer of the plug (10); The plug (10) is in sealing contact with the metering cavity X.

5. The improved compact column dual wire metering device of claim 3 or 4, wherein: The outlet check valve (8) is arranged in the outlet joint body (13); the outlet joint body (13) has an outlet hole (28); The outlet check valve (8) comprises a taper spring (14) and a steel ball (15) arranged in connection; The taper spring (14) and the steel ball (15) are arranged in the outlet hole (28); A stop ring O-ring set (16) is arranged at the end of the outlet joint body (13) and is used for being inserted into a metering cavity X.

6. The improved compact column dual wire metering device of claim 5, wherein: A threaded stop (17) is arranged in the inner cavity of the outlet hole (28); An adjusting nut part (18) is threadedly connected in the threaded stop (17); The adjusting nut part (18) has a middle through hole part (19); An entering ring cavity (25) is arranged in the middle through hole part (19); A ring groove part (23) is arranged on the stepped surface of the entering ring cavity (25); The ring groove part (23) is communicated with a plurality of communication holes (24); An inner side protruding ring (20) is arranged on the inner side wall of the stepped surface of the entering ring cavity (25); The inner side protruding ring (20) is higher than the stepped surface of the entering ring cavity (25); A plurality of guide magnetic attraction lattice plates (21) are distributed on the stepped surface of the entering ring cavity (25).

7. The improved compact column dual wire metering device of claim 6, wherein: The front end of the guide magnetic attraction lattice plate (21) is inserted into the middle through hole part (19).

8. The improved compact column dual wire metering device of claim 6, wherein: A process protruding block (22) is arranged on the back surface of the adjusting nut part (18).

9. The improved compact column dual wire metering device of claim 3, wherein: An inlet and outlet stop (31) is arranged in the mounting seat (2); the inlet and outlet stop (31) has a bottom surface (30) and a ring groove part (29); Oil ports A and B, oil paths V, B and A (26) and (27) are respectively arranged in the mounting seat (2); The oil ports A and B are arranged in the same direction; the oil path A (27) and the oil path B (26) are arranged in the same direction; The oil port A, the oil path V and the oil path A (27) are sequentially communicated and are arranged perpendicularly to each other; The oil port B is communicated with the oil path B (26) and is arranged perpendicularly to each other; The oil path B (26) is communicated with the ring groove part (29); The oil path A (27) is arranged to be isolated from the ring groove part (29).

10. The improved compact column dual wire metering device of claim 9, wherein: The oil path groove C is communicated with the oil path A (27); An oblique oil path M is arranged on the oil injector valve body (3) and is communicated with the oil path groove C; An oil path D is arranged on the oil injector valve body (3) and is communicated with the oblique oil path M along the axis; An oil path E is transversely communicated with the upper part of the oil path D; The oil path E is communicated with a cavity R of an outer end of a control cavity Y; The control cavity Y has cavities R and S at both ends; A gap slot H is arranged between the middle part of the control cavity Y and the plug body of the reversing plunger (5); The gap slot H is arranged to be spaced apart from the cavities R and S on both sides; A cavity S of an inner end of the control cavity Y is communicated with the ring groove part (29); The gap slot H is communicated with an oil path P; The control cavity Y has cavities T and W located on both sides of the metering plunger (4) in the metering cavity X; The oil paths F and H are arranged in the oil injector valve body (3); The oil path F is isolated from the cavity W, and the oil path G is isolated from the cavity T; The oil path gap slot H is provided with a process counterbore at the end of the metering cavity X, which is used for the oil path F to be communicated with the cavity T through a gap, and is used for the oil path G to be communicated with the cavity W through a gap; The oil paths K and J are arranged to be communicated with each other on the oil injector valve body (3); The oil path P is communicated with the oil path J; An outlet joint body (13) is sealingly arranged at the outer end of the metering cavity X; Oil passage Q and Z are radially communicated in the outlet joint body (13); Oil passage K is communicated with oil passage Q; Outlet check valve (8) is arranged at the outlet of oil passage Z; Ring groove is arranged on the outlet joint body (13) and communicated with oil passage Q; The port of metering cavity X has a lengthened protrusion (32); The sealing gasket (9) is sleeved on the lengthened protrusion (32); The sealing gasket (9) has a top sealing surface (34), and an inner sealing surface (35) and an outer sealing inclined surface (33) are respectively arranged on the inner and outer sides of the top sealing surface (34); The outer sealing inclined surface (33) is in pressure contact with the outer side wall of the lengthened protrusion (32); The inner sealing surface (35) is in pressure contact with the inner side wall of the ring groove (29); The top sealing surface (34) is in pressure contact with the bottom surface of the ring groove (29); The lengths of the piston heads at the two ends of the reversing plunger (5) are inconsistent.

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