Full-linkage valve

Abstract

The utility model relates to a fully-connected valve which comprises a valve body, a gland and a valve rod, an oil injection cavity distributed in the axis direction of the valve body is formed in the valve body, the valve rod is arranged in the oil injection cavity in a sliding mode, a sealing mechanism is arranged between the valve rod and the valve body, and a first oil outlet communicated with the oil injection cavity is formed in the lower end of the valve body. The gland is distributed at the upper end of the valve body and detachably connected with the valve body, a lower spring is arranged between the valve rod and the first oil outlet, an upper spring is arranged between the valve rod and the gland, and a second oil outlet communicated with the oil injection cavity penetrates through the gland. A first oil inlet corresponding to the lower half portion of the oil injection cavity and a second oil inlet corresponding to the upper half portion of the oil injection cavity are formed in the side face of the valve body. The utility model provides a fully-connected valve which can be switched among various working states, so that the functions of the valve are greatly enriched, and the application range of the fully-connected valve under various working conditions is expanded.

Description

Technical Field

[0001] The utility model specifically relates to a full-connection valve. Background Art

[0002] The Chinese utility model patent document with the publication number of "CN220792190U" discloses a multi-stage pressure limiting valve, which is composed of a valve body, a gland, a guide rod, a valve core, a spring, a spacer and a sealing device, etc. The valve body and the gland are connected by threads. A stepped guide rod is arranged in the valve body, and a spacer and a spring are arranged on the guide rod to form multiple cavities. An oil outlet and two groups of control ports are arranged on the side of the valve body, and the two groups of control ports are communicated with the cavities. The working principle is that fluids with different pressures are introduced through different control ports to push the guide rod to move, changing the pressing force of the steel ball on the oil inlet to achieve the effect of step-down pressure. This design aims to solve the problems of large oil and gas pressure differences on both sides of the diaphragm of the existing diaphragm compressor, resulting in short diaphragm life and high maintenance costs, and is applicable to occasions requiring step-by-step pressure control.

[0003] However, the multi-stage pressure limiting valve has the following defects: Combining with the attached drawings of the specification of this publication document, Figures 1 to 2 it can be clearly seen that the multi-stage pressure limiting valve is only provided with a group of oil inlets and a group of oil outlets, that is, a group of oil outlets are arranged at the lower end of the valve body, and the gland at the upper end of the valve body is closed and no oil outlets are arranged. Therefore, only a group of oil outlets are provided, and the single oil outlet limits the flow output capacity of the valve and cannot be applied to the working conditions of multi-way output. Therefore, the application scenario of the multi-stage pressure limiting valve is extremely limited. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a full-connection valve aiming at the deficiencies of the above-mentioned prior art, which can switch between multiple working states, greatly enrich the functions of the valve, and expand its application range under various working conditions.

[0005] To achieve the above object, the utility model provides the following technical solution: A full-connection valve, including a valve body, a gland, and a valve rod. An oil injection cavity is arranged in the valve body along the axial direction of the valve body. The valve rod is slidably arranged in the oil injection cavity. A sealing mechanism is arranged between the valve rod and the valve body. A first oil outlet communicated with the oil injection cavity is arranged at the lower end of the valve body. The gland is distributed at the upper end of the valve body and the two are detachably connected. A lower spring is arranged between the valve rod and the first oil outlet. An upper spring is arranged between the valve rod and the gland. The feature is that: a second oil outlet communicated with the oil injection cavity penetrates through the gland. A first oil inlet corresponding to the lower half of the oil injection cavity and a second oil inlet corresponding to the upper half of the oil injection cavity are arranged on the side of the valve body.

[0006] With the above technical solution, the full-connection valve of the present utility model can switch between multiple working states, greatly enriching the functions of the valve and expanding its application scope under various working conditions. Compared with the prior art, this design better meets the requirements of practical applications, providing higher adaptability and operational flexibility. Specifically, the full-connection valve can achieve different fluid control effects according to different states:

[0007] State 1: When the valve stem moves to the middle position of the oil injection cavity, the first oil inlet is connected to the first oil outlet, and the second oil inlet is connected to the second oil outlet respectively. At this time, the full-connection valve is equivalent to a two-way valve, allowing fluid to flow simultaneously in two independent channels. State 2: When the valve stem moves to the upper half of the oil injection cavity and blocks the second oil inlet, only the first oil inlet is connected to the first oil outlet. At this time, the full-connection valve becomes a one-way valve, and the fluid only flows through one channel. State 3: When the valve stem moves to the lower half of the oil injection cavity and blocks the first oil inlet, the one-way valve function is also achieved, but at this time, the second oil inlet is connected to the second oil outlet.

[0008] In addition, by finely adjusting the position of the valve stem, not only can the flow direction of the fluid be controlled, but also the flow rate of the conducting oil path can be adjusted to meet the requirements of multi-stage pressure transformation. For example, when the valve stem approaches but does not completely block the first oil inlet, the flow rate of the second oil outlet will slow down due to the increase in the cavity, while the flow rate of the first oil outlet will increase accordingly. On the contrary, when the valve stem approaches the second oil inlet but does not completely block it, the flow rate of the first oil outlet will slow down, while the flow rate of the second oil outlet will increase. This innovative full-connection valve design can achieve complex fluid control, including flow direction switching, flow rate adjustment, and pressure transformation, through simple valve stem position adjustment, making the valve have broad application prospects in industrial automation and process control and other fields.

[0009] The above-mentioned full-connection valve can be further configured as: a third oil inlet is provided on the side of the valve body and is distributed between the first oil inlet and the second oil inlet, and the third oil inlet corresponds to the middle part of the oil injection cavity.

[0010] By adopting the above technical solution, more precise oil circuit control and pressure regulation are achieved by introducing the third oil inlet. State 4: When the valve stem moves to the upper part of the oil injection chamber and blocks the second oil inlet, the third oil inlet and the first oil inlet remain connected with the first oil outlet. At this time, although the full-valve works as a one-way valve, it has two oil inlets, which not only enhances the stability of the valve stem position and prevents it from being displaced due to pressure changes, but also achieves precise pressure and flow rate control by adjusting the oil pressure in the channel. Similarly, state 5: When the valve stem moves to the lower part of the oil injection chamber, the third oil inlet and the second oil inlet are connected with the second oil outlet. The principle is the same as state 4, but it acts on another set of oil ports, further expanding the valve's adjustment ability and application range. This design significantly improves the flexibility and control accuracy of the full-valve, enabling it to better adapt to changing industrial processes and operating conditions.

[0011] The above-mentioned full-connected valve can be further configured as follows: a flange block is integrally formed on the side of the valve body, the first oil inlet, the second oil inlet, and the third oil inlet all include a threaded oil inlet hole arranged on the flange block and a cylindrical oil filling hole arranged on the valve body, a tapered flow channel is provided between the threaded oil inlet hole and the cylindrical oil filling hole, the large end of the tapered flow channel is connected with the threaded oil inlet hole, and the small end is connected with the cylindrical oil filling hole, the threaded oil inlet hole of the first oil inlet and the threaded oil inlet hole of the second oil inlet have the same inner diameter and are both larger than the inner diameter of the threaded oil inlet hole of the third oil inlet, and the cylindrical oil filling hole of the first oil inlet and the cylindrical oil filling hole of the second oil inlet have the same inner diameter and are both larger than the inner diameter of the cylindrical oil filling hole of the third oil inlet.

[0012] By adopting the above technical solution, the design of the threaded oil inlet, the tapered flow channel, and the cylindrical oil injection hole can increase the flow rate. Among them, the threaded oil inlet and the operation of sealing the oil inlet with parts are simpler and more reliable. The inner diameters of the first and second oil inlets are the same and larger than the third oil inlet, meeting the flow requirements of the main oil inlets at both ends.

[0013] The above-mentioned all-in-one valve can be further configured as follows: a first annular groove is provided on the outer periphery of the middle part of the valve stem, and the sealing mechanism includes an O-ring seal sleeved in the first annular groove and hermetically connected to the inner wall of the oil injection cavity; the sealing mechanism further includes two groups of outward-expanding seals symmetrically distributed at both ends of the valve stem, and each outward-expanding seal includes an inner ring seal piece, an outer ring seal piece, and a sealing connection ring distributed between the inner ring seal piece and the outer ring seal piece. The inner ring seal piece is arranged along the direction parallel to the axis of the valve stem, and one end is integrally formed with the inner ring of the sealing connection ring. One end of the outer ring seal piece is integrally formed with the outer ring of the sealing connection ring, and the other end of the outer ring seal piece inclines towards the inner wall of the oil injection cavity until it abuts against the inner wall of the oil injection cavity. A second annular groove is provided at both ends of the valve stem respectively, and the inner ring seal piece is sleeved in the second annular groove and hermetically connected to the inner wall of the valve stem; a number of groups of grooves are evenly distributed at the connection between the sealing connection ring and the outer ring seal piece.

[0014] With the above technical solution, by providing a first annular groove in the middle of the valve stem and equipping it with an O-ring seal, and providing outward-expanding seals at both ends of the valve stem, high sealing performance is achieved. This design ensures the tight closure of the valve in a high-pressure difference environment, prevents fluid leakage, and improves the reliability and durability of the all-in-one valve. The setting of the O-ring seal provides an initial sealing effect, while the special structure of the outward-expanding seal further enhances the sealing effect under the action of fluid pressure. The sealing connection ring between the inner ring seal piece and the outer ring seal piece, and the inclined design at the end make the seal fit more tightly against the valve body under pressure, thus forming a solid sealing barrier. In addition, the setting of the second annular groove provides a stable installation base for the inner ring seal piece, ensuring long-term and stable sealing performance. Further adding grooves reduces the wear of the outward-expanding seal, and at the same time can provide a certain elastic space for the outward-expanding seal, allowing the outward-expanding seal to have a certain deformation under pressure, so as to better adapt to the small movement of the valve stem and the thermal expansion of the valve body.

[0015] The above-mentioned all-in-one valve can be further configured as follows: guide rods are respectively provided at both ends of the valve stem. One end of the upper spring is sleeved on the outer periphery of a group of guide rods, and the other end abuts against the end of the gland. One end of the lower spring is sleeved on the outer periphery of the other group of guide rods, and the other end abuts against the inner end of the valve stem. Both the upper spring and the lower spring are in a conical shape, and the small ends of the conical shapes of the upper spring and the lower spring both face the valve stem.

[0016] Adopting the above technical solution, by equipping a guide rod and upper and lower springs, the precise and stable movement of the valve stem in the oil injection cavity is ensured, and the control precision of the valve is improved. The arrangement of the upper spring and the lower spring not only provides a reset force for the valve stem, but also alleviates the impact caused by the change of fluid pressure, effectively extending the service life of the valve. The conical spring design increases the contact area, makes the force more uniform, and improves the stability of the spring.

[0017] The above-mentioned all-in-one valve can be further configured as follows: an internal thread connection hole is provided at the end of the valve stem facing the gland, an external thread connection section adapted to the internal thread connection hole is provided on the outer periphery of the gland, and a rectangular sealing gasket is provided between the gland and the valve stem; the second oil outlet includes a threaded oil outlet hole and a cylindrical oil outlet hole arranged in sequence along the axis direction of the gland, and a conical flow channel is also provided between the threaded oil outlet hole and the cylindrical oil outlet hole, and the large end of the conical flow channel is connected to the threaded oil outlet hole and the small end is connected to the cylindrical oil outlet hole, and the inner diameter of the cylindrical oil outlet hole is larger than the inner diameter of the cylindrical oil injection hole.

[0018] Adopting the above technical solution, a rectangular sealing gasket is added to provide sealing between the valve stem and the gland, prevent fluid leakage, and ensure the sealing performance of the valve. "The inner diameter of the cylindrical oil outlet hole is larger than the inner diameter of the cylindrical oil injection hole", compared with the cylindrical oil injection hole, the inner diameter of the oil outlet hole is larger, which helps to improve the fluid discharge efficiency. Among them, for the threaded oil outlet hole, the operation of plugging the oil outlet hole with a part is more convenient and reliable.

[0019] The above-mentioned all-in-one valve can be further configured as follows: an installation seat is also provided outside the valve body along the direction perpendicular to the axis of the valve body, and a plurality of groups of installation holes are provided on the installation seat.

[0020] Adopting the above technical solution facilitates the installation of the all-in-one valve.

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an exploded schematic view of an embodiment of the present invention;

[0023] Figure 2 is a schematic view of the drive plate of an embodiment of the present invention;

[0024] Figure 3 is a schematic view of the locking hook of an embodiment of the present invention;

[0025] Figure 4 is a schematic view of the locked state of an embodiment of the present invention;

[0026] Figure 5 is a schematic view of the unlocked state of an embodiment of the present invention.

[0027] Label notes: valve body a, oil injection cavity a1, first oil outlet a2, first oil inlet a3, second oil inlet a4, third oil inlet a5, flange block a6, threaded oil inlet hole a7, cylindrical oil injection hole a8, conical flow channel a9, mounting seat a10; gland b, second oil outlet b1; valve stem c, first annular groove c1, O-ring c2, guide rod c3, rectangular sealing gasket c4, second annular groove c5; upper spring d; lower spring e; outward-expanding seal f, inner ring seal ring f1, outer ring seal ring f2, sealing connection ring f3, groove f4. Detailed implementation mode

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] As Figures 1 to 5 shown, a full-connection valve includes a valve body a, a gland b, and a valve stem c. An oil injection cavity a1 is provided in the valve body a and is distributed along the axis direction of the valve body a. The valve stem c is slidably arranged in the oil injection cavity a1. A sealing mechanism is provided between the valve stem c and the valve body a. A first oil outlet a2 communicated with the oil injection cavity a1 is provided at the lower end of the valve body a. The gland b is distributed at the upper end of the valve body a and the two are detachably connected. A lower spring e is provided between the valve stem c and the first oil outlet a2. An upper spring d is provided between the valve stem c and the gland b. A second oil outlet b1 communicated with the oil injection cavity a1 penetrates through the gland b. A first oil inlet a3 corresponding to the lower half of the oil injection cavity a1 and a second oil inlet a4 corresponding to the upper half of the oil injection cavity a1 are provided on the side of the valve body a. By simply adjusting the position of the valve stem c, complex fluid control can be achieved, including flow direction switching, flow rate adjustment, and pressure transformation, making the valve have a wide application prospect in the fields of industrial automation and process control.

[0030] A third oil inlet a5 is provided on the side of the valve body a and is distributed between the first oil inlet a3 and the second oil inlet a4. The third oil inlet a5 corresponds to the middle part of the oil injection cavity a1. By introducing the third oil inlet a5, more refined oil circuit control and pressure adjustment are achieved.

[0031] A flange block a6 is integrally formed on the side of the valve body a. The first oil inlet a3, the second oil inlet a4, and the third oil inlet a5 each include a threaded oil inlet hole a7 provided on the flange block a6 and a cylindrical oil injection hole a8 provided on the valve body a. A tapered flow channel a9 is provided between the threaded oil inlet hole a7 and the cylindrical oil injection hole a8. The large end of the tapered flow channel a9 is connected to the threaded oil inlet hole a7, and the small end is connected to the cylindrical oil injection hole a8. The inner diameters of the threaded oil inlet holes a7 of the first oil inlet a3 and the second oil inlet a4 are the same and both are larger than the inner diameter of the threaded oil inlet hole a7 of the third oil inlet a5. The inner diameters of the cylindrical oil injection holes a8 of the first oil inlet a3 and the second oil inlet a4 are the same and both are larger than the inner diameter of the cylindrical oil injection hole a8 of the third oil inlet a5. The design of the threaded oil inlet hole a7, the tapered flow channel a9, and the cylindrical oil injection hole a8 can improve the flow rate. Among them, for the threaded oil inlet hole a7, the operation of plugging the oil inlet hole with a part is more convenient and reliable. The inner diameters of the first oil inlet a3 and the second oil inlet a4 are the same and larger than that of the third oil inlet a5, meeting the flow requirements of the main oil inlets at both ends.

[0032] A first annular groove c1 is provided on the outer periphery of the middle part of the valve stem c. The sealing mechanism includes an O-ring c2 sleeved in the first annular groove c1 and sealingly connected to the inner wall of the oil injection cavity a1; the sealing mechanism further includes two groups of outward-expanding seals f symmetrically distributed at both ends of the valve stem c. The outward-expanding seal f includes an inner ring seal piece f1, an outer ring seal piece f2 and a sealing connection ring f3 distributed between the inner ring seal piece f1 and the outer ring seal piece f2. The inner ring seal piece f1 is arranged along the direction parallel to the axis of the valve stem c and one end is integrally formed with the inner ring of the sealing connection ring f3. One end of the outer ring seal piece f2 is integrally formed with the outer ring of the sealing connection ring f3. The other end of the outer ring seal piece f2 inclines towards the inner wall of the oil injection cavity a1 until it abuts against the inner wall of the oil injection cavity a1. A group of second annular grooves c5 are respectively provided at both ends of the valve stem c. The inner ring seal piece f1 is sleeved in the second annular groove c5 and sealingly connected to the inner wall of the valve stem c; a plurality of groups of grooves f4 are evenly distributed at the connection between the sealing connection ring f3 and the outer ring seal piece f2. By providing the first annular groove c1 in the middle of the valve stem c and equipping with the O-ring c2, and providing the outward-expanding seals f at both ends of the valve stem c, high sealing performance is achieved. This design ensures the tight sealing of the valve in a high-pressure difference environment, prevents fluid leakage, and improves the reliability and durability of the full-link valve. The setting of the O-ring c2 provides an initial sealing effect, while the special structure of the outward-expanding seal f further enhances the sealing effect under the action of fluid pressure. The sealing connection ring f3 between the inner ring seal piece f1 and the outer ring seal piece f2, and the inclined design at the end make the seal fit more tightly against the valve body a under pressure, thus forming a solid sealing barrier. In addition, the setting of the second annular groove c5 provides a stable installation foundation for the inner ring seal piece f1, ensuring long-term stable sealing performance. Further adding the grooves f4 reduces the wear of the outward-expanding seal f, and at the same time can provide a certain elastic space for the outward-expanding seal f, allowing the outward-expanding seal f to have a certain deformation when pressed, so as to better adapt to the slight movement of the valve stem c and the thermal expansion of the valve body a.

[0033] Guide rods c3 are respectively provided at both ends of the valve stem c. One end of the upper spring d is sleeved on the outer periphery of a group of guide rods c3, and the other end is in contact connection with the end of the gland b. One end of the lower spring e is sleeved on the outer periphery of the other group of guide rods c3, and the other end is in contact connection with the inner end of the valve stem c. The upper spring d and the lower spring e are both conical in shape, and the small ends of the conical shapes of the upper spring d and the lower spring e both face the valve stem c. By equipping with the guide rods c3 and the upper and lower springs e, the accurate and stable movement of the valve stem c in the oil injection cavity a1 is ensured, and the control accuracy of the valve is improved. The setting of the upper spring d and the lower spring e not only provides a reset force for the valve stem c, but also relieves the impact caused by the change of fluid pressure, effectively extending the service life of the valve. The conical spring design increases the contact area, makes the force more uniform, and improves the stability of the spring.

[0034] The end of the valve stem c facing the gland b is provided with an internally threaded connection hole, the outer periphery of the gland b is provided with an externally threaded connection section adapted to the internally threaded connection hole, and a rectangular sealing washer c4 is provided between the gland b and the valve stem c; the second oil outlet b1 includes a threaded oil outlet hole and a cylindrical oil outlet hole arranged in sequence along the axis direction of the gland b, and a conical flow channel a9 is also provided between the threaded oil outlet hole and the cylindrical oil outlet hole, and the large end of the conical flow channel a9 is connected to the threaded oil outlet hole and the small end is connected to the cylindrical oil outlet hole, and the inner diameter of the cylindrical oil outlet hole is larger than the inner diameter of the cylindrical oil injection hole a8. The rectangular sealing washer c4 is added to provide the seal between the valve stem c and the gland b, prevent fluid leakage, and ensure the sealing performance of the valve. "The inner diameter of the cylindrical oil outlet hole is larger than the inner diameter of the cylindrical oil injection hole a8", compared with the cylindrical oil injection hole a8, the inner diameter of the oil outlet hole is larger, which helps to improve the fluid discharge efficiency. Among them, for the threaded oil outlet hole, the operation of plugging the oil outlet hole with parts is more convenient and reliable.

[0035] An installation seat a10 is also provided outside the valve body a along the direction perpendicular to the axis of the valve body a, and two groups of installation holes are provided on the installation seat a10. It is convenient for the installation of the full connection valve.

[0036] The full connection valve can achieve the following states:

[0037] State 1: When the valve stem c moves to the middle position of the oil injection cavity a1, the third oil inlet a5 is blocked, and the first oil inlet a3 is respectively conductively connected to the first oil outlet a2, and the second oil inlet a4 is respectively conductively connected to the second oil outlet b1. At this time, the full connection valve is equivalent to a two-way valve, allowing fluid to flow simultaneously in two independent channels.

[0038] State 2: When the valve stem c moves to the upper half of the oil injection cavity a1 and blocks the second oil inlet a4 and the third oil inlet a5, only the first oil inlet a3 and the first oil outlet a2 remain conductively connected. At this time, the full connection valve is transformed into a one-way valve, and the fluid only flows through one channel.

[0039] State 3: When the valve stem c moves to the lower half of the oil injection cavity a1 and blocks the first oil inlet a3 and the third oil inlet a5, the function of a one-way valve is also realized, but at this time, the second oil inlet a4 and the second oil outlet b1 are conductively connected.

[0040] State 4: When the valve stem c moves to the upper half of the oil injection cavity a1 and blocks the second oil inlet a4, the third oil inlet a5 and the first oil inlet a3 and the first oil outlet a2 remain conductively connected. At this time, although the full connection valve works as a one-way valve, it has two oil inlets, which not only enhances the stability of the position of the valve stem c and prevents its displacement due to pressure changes, but also realizes precise pressure and flow rate control by adjusting the oil pressure in the channel.

[0041] State Five: When the valve stem c moves to the lower half of the oil injection chamber a1, the third oil inlet a5 and the second oil inlet a4 are in communication with the second oil outlet b1. The principle is the same as that of State Four, but it acts on another set of oil ports, further expanding the adjustment ability and application range of the valve. This design significantly improves the flexibility and control precision of the full union valve, enabling it to better adapt to changing industrial processes and operating conditions.

[0042] In addition, by finely adjusting the position of the valve stem c, not only can the flow direction of the fluid be controlled, but also the flow rate of the conducting oil circuit can be adjusted to meet the requirements of multi-stage pressure transformation.

[0043] For example, in State Six: When the valve stem c approaches but does not completely block the first oil inlet a3, the flow rate of the second oil outlet b1 will slow down due to the increase in the cavity, while the flow rate of the first oil outlet a2 will increase accordingly.

[0044] In State Seven, when the valve stem c approaches the second oil inlet a4 but does not completely block it, the flow rate of the first oil outlet a2 will slow down, while the flow rate of the second oil outlet b1 will increase.

Claims

1. A full connection valve, comprising a valve body, a gland, and a valve stem. An oil injection cavity is provided in the valve body and distributed along the axis direction of the valve body. The valve stem is slidably arranged in the oil injection cavity. A sealing mechanism is provided between the valve stem and the valve body. A first oil outlet communicated with the oil injection cavity is provided at the lower end of the valve body. The gland is distributed at the upper end of the valve body and the two are detachably connected. A lower spring is provided between the valve stem and the first oil outlet, and an upper spring is provided between the valve stem and the gland. It is characterized in that: A second oil outlet communicating with the oil injection chamber penetrates through the gland, and a first oil inlet corresponding to the lower half of the oil injection chamber and a second oil inlet corresponding to the upper half of the oil injection chamber are provided on the side surface of the valve body.

2. The all-connected valve according to claim 1, characterized in that: A third oil inlet is provided on the side surface of the valve body and is distributed between the first oil inlet and the second oil inlet, and the third oil inlet corresponds to the middle part of the oil injection chamber.

3. The all-in-one valve according to claim 2, characterized in that: A flange block is integrally formed on the side surface of the valve body. The first oil inlet, the second oil inlet, and the third oil inlet each include a threaded oil inlet hole provided on the flange block and a cylindrical oil injection hole provided on the valve body. A tapered flow channel is provided between the threaded oil inlet hole and the cylindrical oil injection hole. The large end of the tapered flow channel is connected to the threaded oil inlet hole, and the small end is connected to the cylindrical oil injection hole. The inner diameters of the threaded oil inlet holes of the first oil inlet and the second oil inlet are the same and are both larger than the inner diameter of the threaded oil inlet hole of the third oil inlet. The inner diameters of the cylindrical oil injection holes of the first oil inlet and the second oil inlet are the same and are both larger than the inner diameter of the cylindrical oil injection hole of the third oil inlet.

4. A fully connected valve according to claim 3, characterized in that: A first annular groove is provided on the outer periphery of the middle part of the valve stem. The sealing mechanism includes an O-ring seal sleeved in the first annular groove and sealingly connected to the inner wall of the oil injection chamber. The sealing mechanism further includes two groups of outward-expanding seals symmetrically distributed at both ends of the valve stem. The outward-expanding seal includes an inner ring seal piece, an outer ring seal piece, and a sealing connection ring distributed between the inner ring seal piece and the outer ring seal piece. The inner ring seal piece is arranged along the direction parallel to the axis of the valve stem, and one end is integrally formed with the inner ring of the sealing connection ring. One end of the outer ring seal piece is integrally formed with the outer ring of the sealing connection ring. The other end of the outer ring seal piece inclines towards the inner wall of the oil injection chamber until it abuts against the inner wall of the oil injection chamber. A second annular groove is provided at both ends of the valve stem respectively. The inner ring seal piece is sleeved in the second annular groove and is sealingly connected to the inner wall of the valve stem. A number of groups of grooves are evenly distributed at the connection between the sealing connection ring and the outer ring seal piece.

5. The all-in-one valve according to claim 4, characterized in that: Guide rods are provided at both ends of the valve stem respectively. One end of the upper spring is sleeved on the outer periphery of a group of guide rods, and the other end abuts against the end of the gland. One end of the lower spring is sleeved on the outer periphery of the other group of guide rods, and the other end abuts against the inner end of the valve stem. The upper spring and the lower spring are both conical, and the small ends of the conical shapes of the upper spring and the lower spring both face the valve stem.

6. The all-in-one valve according to claim 5, wherein: An internally threaded connection hole is provided at the end of the valve stem facing the gland. An externally threaded connection section adapted to the internally threaded connection hole is provided on the outer periphery of the gland. A rectangular sealing washer is provided between the gland and the valve stem. The second oil outlet includes a threaded oil outlet hole and a cylindrical oil outlet hole arranged in sequence along the axis of the gland. A tapered flow channel is also provided between the threaded oil outlet hole and the cylindrical oil outlet hole, and the large end of the tapered flow channel is connected to the threaded oil outlet hole, and the small end is connected to the cylindrical oil outlet hole. The inner diameter of the cylindrical oil outlet hole is larger than the inner diameter of the cylindrical oil injection hole.

7. A fully-connected valve according to claim 6, characterized in that: An installation seat is further provided outside the valve body and is arranged in a direction perpendicular to the axis of the valve body. A number of groups of installation holes are provided on the installation seat.

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