Rotary valve and manufacturing process thereof

Abstract

The invention discloses a rotary valve and a manufacturing process thereof, and relates to the technical field of automobile oil cylinders. Comprising a valve body, an oil inlet channel, an oil outlet channel and an oil return channel which are communicated with one another are arranged in the valve body, a valve element is slidably connected in the valve body, a valve deck is fixedly installed at the top end of the valve body, and a valve element spring is arranged between the valve deck and the valve element; the monitoring mechanism comprises an auxiliary spring seat, the auxiliary spring seat is slidably connected to the inner side of the valve cover, a rigid spring is arranged on the side, away from the valve element, of the auxiliary spring seat, a follow-up rod is fixedly connected to the top end of the valve element, and a monitoring assembly is arranged at the bottom of the auxiliary spring seat; and the early warning mechanism is fixedly arranged on the outer wall of the valve cover. According to the rotary valve, when the compression amount of the valve element spring is increased under the same pressure due to elastic fatigue, the follow-up rod in the monitoring mechanism is used for triggering the monitoring assembly in the auxiliary spring seat along with rising of the valve element, so that the fault of the valve element spring can be known in time and maintained, and the use quality of the rotary valve is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile oil cylinders, in particular to a rotary valve and a manufacturing process thereof. Background Art

[0002] The rotary valve used on the automobile cylinder is also called the oil return valve. Its function is to prevent the fuel system pressure from being too high by controlling the reflux of fuel, maintain the pressure balance of the oil pressure system, ensure the smooth operation of the engine, and thus protect the safety of the hydraulic device and the engine.

[0003] In the prior art, the working principle of the oil return valve is based on pressure control. When the pressure of the fuel rail is within a normal range, the valve core uses the pressure provided by the valve core spring to block the oil return pipeline, and the fuel passes through the oil return valve normally; when the pressure of the fuel rail exceeds the preset value, the spring is compressed and deformed, and the pressure pushes the valve core to open, and the oil return valve will automatically open, allowing excess fuel to flow back from the oil return pipeline to the fuel tank, thereby maintaining the pressure balance of the fuel system.

[0004] In the prior art, the valve core spring in the oil return valve is a wearing part. Long-term use will cause elastic fatigue of the valve core spring and reduce the stiffness coefficient of the valve core spring, resulting in the valve core in the valve housing being fully opened when the fuel pressure has not yet reached the set maximum pressure value, affecting the accuracy of the oil return valve in maintaining the pressure balance of the fuel system. At present, the failure of the valve core spring on the oil return valve can only be discovered by lifting it for maintenance and inspection. The oil return valve itself cannot prompt the failure of the valve core spring, resulting in the valve core spring on the oil return valve being unable to be maintained in time, thereby increasing the damage to the fuel system and the oil return valve and affecting the use quality of the oil return valve. For this reason, a rotary valve and a manufacturing process thereof are proposed. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a rotary valve and a manufacturing process thereof, which solves the problem that the elastic fatigue of the valve core spring cannot be monitored on the current oil return valve, which easily leads to increased damage due to untimely maintenance of the oil return valve.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a rotary valve, comprising:

[0007] A valve body, wherein the valve body is provided with an oil inlet channel, an oil outlet channel and an oil return channel interconnected with each other, a valve core is slidably connected in the valve body for separating the oil return channel from the oil inlet channel and the oil outlet channel, a valve cover is fixedly installed on the top of the valve body, and a valve core spring is provided between the valve cover and the valve core;

[0008] A monitoring mechanism, the monitoring mechanism comprising an auxiliary spring seat, the auxiliary spring seat is slidably connected to the inner side of the valve cover, a rigid spring is provided on the side of the auxiliary spring seat away from the valve core, a follower rod is fixedly connected to the top of the valve core and extends to the position below the auxiliary spring seat, and a monitoring component is provided at the bottom of the auxiliary spring seat and directly above the follower rod;

[0009] The early warning mechanism is fixedly arranged on the outer wall of the valve cover, and the auxiliary spring seat drives the early warning mechanism to generate an early warning action through the monitoring component.

[0010] Preferably, a rectangular through slot is provided on one side of the auxiliary spring seat close to the warning mechanism, a right-angle through hole is provided inside the auxiliary spring seat, and both ends of the right-angle through hole are respectively connected to the rectangular through slot and the bottom end of the auxiliary spring seat, and the monitoring component comprises:

[0011] A round head frame, wherein one end of the round head frame facing the inner side of the right-angle through hole is round head-shaped, and the side of the top end of the follower rod close to the round head frame is inclined;

[0012] A trapezoidal block, the height of which gradually decreases in the direction close to the inner wall of the valve body, and one end of the round head frame close to the rectangular through groove is fixedly connected to the outer wall of the trapezoidal block;

[0013] The first elastic member is fixedly arranged between the right-angle through hole and the round head frame, and is used for providing an elastic thrust for resetting the round head frame.

[0014] Preferably, the early warning mechanism includes a first in-position switch, and the start and stop of the first in-position switch are controlled by driving the trapezoidal block to move laterally when the follower rod is inserted into the right-angle through hole.

[0015] Preferably, the early warning mechanism also includes:

[0016] A guide sleeve fixedly connected to the outer wall of the valve cover, the guide sleeve being slidably connected to a lifting bracket, the top of the lifting bracket extending above the guide sleeve and fixedly connected to a warning bell;

[0017] A transmission assembly, wherein the transmission assembly is arranged at the bottom of the guide sleeve, and when the trapezoidal block moves laterally, the transmission assembly drives the lifting bracket to rise;

[0018] The bell core sleeve is located directly below the warning bell and is fixedly connected to the top of the guide sleeve. A truncated cone groove is provided at the top of the bell core sleeve, and a hemispherical groove adapted to the bell core inside the warning bell is provided at the bottom of the truncated cone groove.

[0019] Preferably, the transmission assembly includes a bevel rod, one end of which extends into the interior of the valve cover, and the other end of which extends into the interior of the guide sleeve, the bottom end of the lifting bracket is fixedly connected to a caster, and a second elastic member is fixedly connected between the bevel rod and the bottom of the guide sleeve.

[0020] Preferably, an upper spring seat for rigid spring support is slidably connected to the top of the inner cavity of the valve cover, a nut seat is fixedly connected to the top port of the valve cover, an adjusting screw is threadedly connected to the inner side of the nut seat, the bottom of the adjusting screw is movably connected to the middle of the upper spring seat, a sealing gasket is provided between the valve cover and the valve body, and a fastener for locking and fixing the two is inserted at the end between the valve cover and the valve body.

[0021] Preferably, a protective sleeve is provided on the top of the valve cover and at the movable sleeve located outside the adjusting screw, a positioning block is fixedly connected to the top of the inner side of the protective sleeve, the middle part of the bottom end of the positioning block is in the shape of an upwardly concave groove and is slidably connected to a positioning sleeve, and a third elastic member is fixedly connected between the positioning sleeve and the top of the groove.

[0022] Preferably, an annular groove with an L-shaped cross-section is provided at the top of the nut seat, an inner tooth ring is fixedly connected to the top of the inner wall of the annular groove close to the protective sleeve, an L-shaped block is movably connected in the annular groove, an outer tooth block is fixedly connected to the side of the L-shaped block close to the inner tooth ring, an unlocking hand rod is slidably connected to the side wall of the protective sleeve, a pressing spring is fixedly connected between the end of the unlocking hand rod and the outer wall of the protective sleeve, and one end of the unlocking hand rod is fixedly connected to the top of the L-shaped block.

[0023] Preferably, a one-way oil return channel connected to the oil return channel is provided on the outer wall of the valve body and located above the oil return channel, and a mounting groove connected to the outside is provided on the inner wall of the valve body located above the one-way oil return channel, a cone head connecting rod is slidably connected in the mounting groove, and a spring stopper is fixedly connected to the end of the cone head connecting rod away from the valve body cavity, a second in-position switch is fixedly installed at a position corresponding to the valve body wall and the mounting groove, a reset spring is fixedly connected between the spring stopper and the second in-position switch, and the end of the cone head connecting rod away from the spring stopper is frustum-conical and extends into the valve body cavity.

[0024] On the other hand, the present invention also provides a rotary valve manufacturing process, comprising the following steps:

[0025] Step 1: Select corresponding manufacturing materials according to the use environment of the oil return valve, wherein the material of the valve body includes but is not limited to alloy steel, carbon steel or stainless steel, and the valve core and other components are made of corrosion-resistant and wear-resistant materials;

[0026] Step 2: Design the production drawings of the rotary valve, determine the shape and size of the valve body, valve core and other components of the rotary valve, and produce the blanks of the valve body, valve core and other components by forging, casting or machine tool processing;

[0027] Step 3, precision machining the blank obtained in step 2 to ensure that the size accuracy and surface roughness of the blank meet the design requirements, wherein the precision machining includes but is not limited to turning, milling and grinding;

[0028] Step 4: Surface treatment is performed on the precision machined blank in step 3 to improve the corrosion resistance and surface quality of the valve body, valve core and other components, wherein the surface treatment includes but is not limited to spraying, painting and electroplating.

[0029] Step five, assemble the valve body, valve core and other component structures processed in step four according to the installation drawings to obtain a complete rotary valve, and inspect the assembled rotary valve. The inspection categories include but are not limited to sealing tests and functional tests.

[0030] The present invention discloses a rotary valve and a manufacturing process thereof, which have the following beneficial effects:

[0031] (1) The rotary valve provided by the present invention can, when the compression amount of the valve core spring increases under the same pressure due to elastic fatigue, use the follower rod in the monitoring mechanism to rise with the valve core and trigger the monitoring component in the auxiliary spring seat, so that the monitoring component can be activated to monitor the fault of the valve core spring, so that the fault of the valve core spring can be known in time and maintenance can be carried out, which helps to improve the service quality of the rotary valve.

[0032] (2) The present invention arranges an early warning mechanism on the outside of the valve cover, and uses a transmission component to convert the action of the monitoring component into a lifting force to drive the warning bell. At the same time, the bell core clamp sets a silent limit on the initial position of the warning bell, so that when the monitoring mechanism detects a valve core spring failure, the warning bell can be driven to separate from the bell core clamp, so that the warning bell can use the vibration force generated by the mechanical operation to generate a bell sound for early warning;

[0033] (3) The present invention provides a one-way oil return channel connected to the oil return channel in the valve body, so that when the pressure in the valve body exceeds the preset maximum pressure, the pressure in the valve body further pushes the valve core upward to expose the one-way oil return channel. While controlling the oil pressure in the valve body, the further upward movement of the valve core drives the cone head connecting rod to trigger the second in-position switch, so that the second in-position switch generates an electrical signal of excessive pressure. By receiving the fault electrical signal through an external terminal, the problem of excessive oil pressure in the valve body can be timely understood, and the oil pressure in the valve body can be controlled at the same time, thereby improving the use quality of the rotary valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 It is a front cross-sectional structural schematic diagram of the present invention;

[0037] Figure 3 For the present invention Figure 1 A local enlarged structural schematic diagram;

[0038] Figure 4 It is a front cross-sectional structural schematic diagram of the valve core and the auxiliary spring seat of the present invention;

[0039] Figure 5 It is a schematic diagram of the partial front cross-sectional structure of the fault prompt mechanism of the present invention;

[0040] Figure 6 It is a schematic diagram of a three-dimensional cross-sectional structure of the stationary seat of the present invention;

[0041] Figure 7 It is a schematic diagram of a partial front cross-sectional structure of the valve housing of the present invention;

[0042] Figure 8 This is a schematic diagram of a partial cross-sectional structure of the front side of the protective cover of the present invention;

[0043] Fig. 9 For the present invention Figure 8 Schematic diagram of the local enlarged structure at point B.

[0044] In the figure: 100, valve body; 101, oil inlet channel; 102, oil outlet channel; 103, oil return channel; 104, valve cover; 105, sealing gasket; 106, fastener; 107, protective cover; 108, valve core; 109, upper spring seat; 110, valve core spring;

[0045] 201, auxiliary spring seat; 202, rigid spring; 203, follower rod; 204, right-angle through hole; 205, round head frame; 206, first elastic member; 207, trapezoidal block; 208, rectangular through slot; 209, lifting bracket; 210, warning bell; 211, oblique head rod; 212, second elastic member; 213, caster; 214, bell core sleeve; 215, first in-position switch; 216, truncated cone slot; 217, hemispherical slot; 218, guide sleeve;

[0046] 300, one-way oil return channel; 301, cone head connecting rod; 302, installation slot; 303, spring stopper; 304, return spring; 305, second position switch;

[0047] 400, adjusting screw; 401, nut seat; 402, positioning block; 403, positioning sleeve; 404, third elastic member; 405, annular groove; 406, inner gear ring; 407, L-shaped block; 408, outer gear block; 409, unlocking handle; 410, pressing spring. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] The embodiment of the present application provides a rotary valve and its manufacturing process, thereby solving the problem that the elastic fatigue of the valve core spring 110 cannot be monitored on the current return oil valve, which easily leads to increased damage due to untimely maintenance of the return oil valve. When the compression amount of the valve core spring 110 increases under the same pressure due to elastic fatigue, the follower rod 203 in the monitoring mechanism rises with the valve core 108 to trigger the monitoring component in the auxiliary spring seat 201, so that the monitoring component is activated to monitor the fault of the valve core spring 110, so that the fault of the valve core spring 110 can be known in time and maintained, thereby helping to improve the use quality of the rotary valve.

[0050] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0051] The embodiment of the invention discloses a rotary valve.

[0052] Embodiment 1, according to Figure 1-Figure 9As shown, it includes a valve body 100, a monitoring mechanism and an early warning mechanism. The valve body 100 is provided with an oil inlet channel 101, an oil outlet channel 102 and an oil return channel 103 which are interconnected. A valve core 108 is slidably connected in the valve body 100 for separating the oil return channel 103 from the oil inlet channel 101 and the oil outlet channel 102. A valve cover 104 is fixedly installed on the top of the valve body 100. A valve core spring 110 is provided between the valve cover 104 and the valve core 108. The early warning mechanism is fixedly arranged on the outer wall of the valve cover 104. The auxiliary spring seat 201 drives the early warning mechanism to generate an early warning action through the monitoring component. When the fuel rail pressure is within the normal range, the fuel is discharged from the oil inlet channel 101 to the fuel rail. After entering the channel 101, it flows out through the return oil channel 103. When the pressure of the fuel rail exceeds the preset value, the valve body 100 uses the fuel pressure to squeeze the valve core 108 to move up and squeeze the valve core spring 110 to open the return oil channel 103, allowing excess fuel to flow back to the fuel tank through the return oil channel 103, so as to achieve the purpose of maintaining the fuel pressure balance. At the same time, when the fuel pressure returns to the normal value range, the valve core spring 110 drives the valve core 108 to reset and block the return oil channel 103, so that the fuel can be normally transported from the oil inlet channel 101 through the oil outlet channel 102. In this process, the valve core spring 110 is prone to elastic fatigue due to frequent deformation. The spring coefficient of the rotary valve is reduced. When the fuel pressure in the valve body 100 makes the oil return passage 103 in a fully open state, the rising distance of the valve core 108 will increase. At this time, the change in the rising distance of the valve core 108 will be monitored by the monitoring mechanism, and an action feedback will be generated to the early warning mechanism, so that the elastic fatigue of the valve core spring 110 can be timely understood, and corresponding maintenance can be carried out in time to ensure the quality of the rotary valve. The monitoring mechanism includes an auxiliary spring seat 201, which is slidably connected to the inner side of the valve cover 104, and a rigid spring 202 is provided on the side of the auxiliary spring seat 201 away from the valve core 108. The top of the valve core 108 is A follower rod 203 extending to the position below the auxiliary spring seat 201 is fixedly connected, and a monitoring component is provided at the bottom of the auxiliary spring seat 201 and directly above the follower rod 203. The setting of the rigid spring 202 can cooperate with the valve core spring 110 when the valve core 108 is fully opened. At this time, the valve core spring 110 and the rigid spring 202 have the same elastic coefficient, and will deform synchronously under further external pressure. In this way, when the valve core spring 110 is in good working condition, the top of the follower rod 203 will not enter the auxiliary spring seat 201 to drive the monitoring mechanism to operate, thereby avoiding the occurrence of misjudgment.

[0053] Furthermore, a rectangular through groove 208 is provided on one side of the auxiliary spring seat 201 close to the warning mechanism, a right-angle through hole 204 is provided inside the auxiliary spring seat 201, the cross section of the right-angle through hole 204 is L-shaped, and the two ends of the right-angle through hole 204 are respectively connected with the rectangular through groove 208 and the bottom end of the auxiliary spring seat 201, the monitoring component includes a round head frame 205, a trapezoidal block 207 and a first elastic member 206, the end of the round head frame 205 facing the inner side of the right-angle through hole 204 is round head-shaped, the top of the follower rod 203 is close to the side of the round head frame 205 is inclined, and the height of the trapezoidal block 207 gradually decreases along the direction close to the inner wall of the valve body 100, One end of the round head frame 205 close to the rectangular through groove 208 is fixedly connected to the outer wall of the trapezoidal block 207, and the first elastic member 206 is fixedly arranged between the right-angle through hole 204 and the round head frame 205. The first elastic member 206 is used to provide an elastic thrust for the round head frame 205 to reset. After the top of the follower rod 203 enters the right-angle through hole 204, it contacts the round head side of the round head frame 205 to achieve the purpose of lateral extrusion, so that the round head frame 205 drives the trapezoidal block 207 to move in the rectangular through groove 208, so that the monitoring component can be actuated, thereby monitoring the failure of the valve core spring 110 by monitoring whether the monitoring component is actuated.

[0054] Among them, the early warning mechanism includes a guide sleeve 218 fixedly connected to the outer wall of the valve cover 104, a transmission assembly and a bell core sleeve 214, a lifting bracket 209 is slidably connected to the guide sleeve 218, the top of the lifting bracket 209 extends to the top of the guide sleeve 218 and is fixedly connected to the warning bell 210; the transmission assembly is arranged at the bottom of the guide sleeve 218, and the lifting bracket 209 is driven to rise by the transmission assembly when the trapezoidal block 207 moves horizontally; the bell core sleeve 214 is located directly below the warning bell 210 and is fixedly connected to the top of the guide sleeve 218, a truncated cone groove 216 is provided at the top of the bell core sleeve 214, and a hemispherical groove 217 adapted to the bell core inside the warning bell 210 is provided at the bottom of the truncated cone groove 216, and a rectangular through groove 208 is provided on the side wall of the auxiliary spring seat 201 in the monitoring assembly, which can make way for the end of the inclined head rod 211 in the transmission assembly extending into the interior of the valve body 100, so that the auxiliary spring seat 201 can be assisted. In the range of the upper and lower heights, the driving of the transmission assembly can be achieved. At the same time, the trapezoidal block 207 cooperates with the oblique rod 211, so that the trapezoidal block 207 can smoothly squeeze the oblique rod 211. When the trapezoidal block 207 in the monitoring assembly moves horizontally, the reversing transmission of the transmission assembly drives the lifting bracket 209 to rise, so that the warning bell 210 is separated from the bell core sleeve 214. In this way, the vibration generated by the operation of the oil and its components can drive the bell core in the warning bell 210 to shake, thereby generating a bell sound, so as to alarm the valve core spring 110 failure; wherein, the truncated cone groove 216 with a wide top and a narrow bottom on the bell core sleeve 214 cooperates with the hemispherical groove 217, so that the shaking bell core can be guided during the downward movement of the warning bell 210, so that the bell core can be firmly clamped and positioned during the falling process of the warning bell 210, so that no bell sound will be generated when the valve core spring 110 is not faulty.

[0055] Among them, the transmission component includes a bevel rod 211, one end of the bevel rod 211 extends to the inside of the valve cover 104, and the other end of the bevel rod 211 extends to the inside of the guide sleeve 218. The bottom end of the lifting bracket 209 is fixedly connected with a caster 213, and a second elastic member 212 is fixedly connected between the bevel rod 211 and the bottom of the guide sleeve 218. The setting of the caster 213, combined with the inclined surface effect of the bevel rod 211, allows the trapezoidal block 207 to stably and smoothly drive the caster 213 to perform vertical lifting and lowering movements through the bevel rod 211, thereby ensuring the smoothness of the reversing and transmission of the transmission component in the early warning mechanism.

[0056] Furthermore, an upper spring seat 109 for supporting the rigid spring 202 is slidably connected to the top of the inner cavity of the valve cover 104, a nut seat 401 is fixedly connected to the top port of the valve cover 104, an adjusting screw 400 is threadedly connected to the inner side of the nut seat 401, and the bottom of the adjusting screw 400 is movably plugged with the middle of the upper spring seat 109, a sealing gasket 105 is provided between the valve cover 104 and the valve body 100, and a fastener 106 for locking and fixing the two is plugged into the end between the valve cover 104 and the valve body 100, and the threaded compression of the adjusting screw 400 and the nut seat 401 is utilized to make the upper spring seat 109 move up and down while the adjusting screw 400 rotates, so that the preload force of the valve core spring 110 can be adjusted, so that the assembly accuracy of the valve core spring 110 is improved during the assembly and debugging process, and the debugging operation is made more convenient and efficient;

[0057] In a preferred embodiment, a protective sleeve 107 is provided at the top of the valve cover 104 and is movably sleeved at the outer position of the adjusting screw 400. A positioning block 402 is fixedly connected to the top of the inner side of the protective sleeve 107. The middle part of the bottom end of the positioning block 402 is in the shape of an upwardly concave groove and is slidably connected to a positioning sleeve 403. A third elastic member 404 is fixedly connected between the positioning sleeve 403 and the top of the groove; an annular groove 405 with an L-shaped cross-section is provided at the top of the nut seat 401, and an inner toothed ring 406 is fixedly connected to the top of the inner wall of the annular groove 405 on one side close to the protective sleeve 107. The inner side of the annular groove 405 is movably connected to the inner wall of the annular groove 405. There is an L-shaped block 407, and an outer tooth block 408 is fixedly connected to one side of the L-shaped block 407 close to the inner tooth ring 406. An unlocking handle 409 is slidably inserted into the side wall of the protective sleeve 107. A pressing spring 410 is fixedly connected between the end of the unlocking handle 409 and the outer wall of the protective sleeve 107. One end of the unlocking handle 409 is fixedly connected to the top of the L-shaped block 407. In the initial position, the unlocking handle 409 uses the thrust provided by the pressing spring 410 to drive the bottom of the L-shaped block 407 to insert into the side of the annular groove 405 toward the inner wall of the protective sleeve 107, so as to tighten the protective sleeve 107 and the nut seat 401. The inner gear ring 406 and the outer gear block 408 are in meshing state at this position, which can limit the radial direction of the L-shaped block 407, so that the protective sleeve 107 cannot rotate outside the nut seat 401, so as to ensure the stable installation of the protective sleeve 107 on the valve cover 104. At the same time, the unlocking hand lever 409 can be pressed horizontally to make the L-shaped block 407 move horizontally, and its own limit in the vertical and radial directions can be released, which can not only make the protective sleeve 107 rotate, but also The protective sleeve 107 can be separated from the valve cover 104 for disassembly, and the positioning block 402, the positioning sleeve 403 and the third elastic member 404 can cooperate to limit the radial direction between the adjusting screw 400 and the protective sleeve 107. The adjusting screw 400 can be driven to rotate by rotating the unlocked protective sleeve 107, so that the pre-tightening adjustment operation of the valve core spring 110 is more convenient, and there is no need to repeatedly disassemble and assemble the protective sleeve 107 to drive the adjusting screw 400. At the same time, it can also ensure that the adjusting screw 400 is in a stable position during use and is not easy to rotate, thereby improving the overall safety.

[0058] Embodiment 2, according to the attached Figure 2 and Figure 7As shown, on the basis of the first embodiment, a one-way oil return passage 300 connected to the oil return passage 103 is provided on the inner wall of the valve body 100 and located above the oil return passage 103, and a mounting groove 302 connected to the outside is provided on the inner wall of the valve body 100 located above the one-way oil return passage 300, a cone head connecting rod 301 is slidably connected in the mounting groove 302, and a spring stopper 303 is fixedly connected to the end of the cone head connecting rod 301 away from the inner cavity of the valve body 100, and a second in-position switch 305 is fixedly installed at a position corresponding to the outer wall of the valve body 100 and the mounting groove 302, and a return spring 304 is fixedly connected between the spring stopper 303 and the second in-position switch 305, and the end of the cone head connecting rod 301 away from the spring stopper 303 is truncated and extends into the inner cavity of the valve body 100. In this embodiment, when the valve core 108 moves up to the position where the top of the oil return passage 103 is fully opened, the oil pressure in the valve body 100 is When it still exceeds the set range value, the valve core 108 will continue to move up a distance due to the oil pressure, so that the valve core 108 moves up to the top of the one-way oil return channel 300, so that the fuel in the valve body 100 can enter the oil return channel 103 from the one-way oil return channel 300, thereby increasing the oil return efficiency (in other embodiments, the one-way oil return channel 300 may not be connected to the oil return channel 103, but directly connected to an external oil return pipe for oil return, so that an oil return pipeline is added to achieve the purpose of increasing the oil return efficiency, which can not only relieve the fuel pressure in the valve body 100, but also squeeze the cone head connecting rod 301 when the valve core 108 moves up, so that one end of the cone head connecting rod 301 squeezes the second in-position switch 305, so that the second in-position switch 305 can generate an electrical signal, and the electrical signal is received by the external terminal (the automobile central control unit), so that the fault of excessive oil pressure in the valve body 100 can be fed back, so that the use safety and protection of the rotary valve is higher.

[0059] Embodiment 3 differs from Embodiment 1 in that the early warning mechanism includes a first in-position switch 215, and the start and stop of the first in-position switch 215 is controlled by driving the trapezoidal block 207 to move horizontally when the follower rod 203 is inserted into the right-angle through hole 204. The first in-position switch 215 can directly replace the early warning mechanism, so that the trapezoidal block 207 in the monitoring mechanism directly drives the first in-position switch 215, thereby directly obtaining the electrical signal of the valve core spring 110 failure. The first in-position switch 215 can also be installed to the top position of the inner wall of the guide sleeve 218, so that the lifting bracket 209 rises into position and triggers the first in-position switch 215 to generate an electrical signal. In this way, the purpose of double early warning can be achieved, and the double protection means make the fault monitoring of the valve core spring 110 in the rotary valve more accurate.

[0060] A rotary valve manufacturing process comprises the following steps:

[0061] Step 1: Select corresponding manufacturing materials according to the use environment of the oil return valve, wherein the material of the valve body 100 includes but is not limited to alloy steel, carbon steel or stainless steel, and the valve core 108 and other components are made of corrosion-resistant and wear-resistant materials;

[0062] Step 2: Design the production drawings of the rotary valve, determine the shapes and sizes of the valve body, valve core and other components of the rotary valve, and produce the blanks of the valve body 100, valve core 108 and other components by forging, casting or machine tool processing;

[0063] Step 3, precision machining the blank obtained in step 2 to ensure that the size accuracy and surface roughness of the blank meet the design requirements, wherein the precision machining includes but is not limited to turning, milling and grinding;

[0064] Step 4: Surface treatment is performed on the precision machined blank in step 3 to improve the corrosion resistance and surface quality of the valve body 100, valve core 108 and other components, wherein the surface treatment includes but is not limited to spraying, painting and electroplating.

[0065] Step five, assemble the valve body 100, valve core 108 and other component structures processed in step four to obtain a complete rotary valve, and inspect the assembled rotary valve, the inspection categories include but are not limited to sealing test and function test.

[0066] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A rotary valve, characterized in that: include: A valve body (100), wherein the valve body (100) is provided with an oil inlet passage (101), an oil outlet passage (102) and an oil return passage (103) which are interconnected, wherein a valve core (108) is slidably connected in the valve body (100) for separating the oil return passage (103) from the oil inlet passage (101) and the oil outlet passage (102), wherein a valve cover (104) is fixedly mounted on the top end of the valve body (100), and a valve core spring (110) is provided between the valve cover (104) and the valve core (108); A monitoring mechanism, the monitoring mechanism comprising an auxiliary spring seat (201), the auxiliary spring seat (201) being slidably connected to the inner side of the valve cover (104), a rigid spring (202) being provided on a side of the auxiliary spring seat (201) away from the valve core (108), a follower rod (203) extending to a position below the auxiliary spring seat (201) being fixedly connected to the top of the valve core (108), and a monitoring component being provided at the bottom of the auxiliary spring seat (201) and located directly above the follower rod (203); An early warning mechanism is fixedly arranged on the outer wall of the valve cover (104), and the auxiliary spring seat (201) drives the early warning mechanism to generate an early warning action through a monitoring component.

2. A rotary valve according to claim 1, characterized in that: A rectangular through slot (208) is provided on one side of the auxiliary spring seat (201) close to the warning mechanism, a right-angle through hole (204) is provided inside the auxiliary spring seat (201), and two ends of the right-angle through hole (204) are respectively connected to the rectangular through slot (208) and the bottom end of the auxiliary spring seat (201), and the monitoring component comprises: A round head frame (205), wherein one end of the round head frame (205) facing the inner side of the right-angle through hole (204) is round head-shaped, and the side of the top end of the follower rod (203) close to the round head frame (205) is inclined; A trapezoidal block (207), wherein the height of the trapezoidal block (207) gradually decreases in a direction close to the inner wall of the valve body (100), and one end of the round head frame (205) close to the rectangular through groove (208) is fixedly connected to the outer wall of the trapezoidal block (207); A first elastic member (206), wherein the first elastic member (206) is fixedly arranged between the right-angle through hole (204) and the round head frame (205), and the first elastic member (206) is used to provide an elastic thrust for resetting the round head frame (205).

3. A rotary valve according to claim 2, characterized in that: The early warning mechanism comprises a first in-position switch (215), and the follower rod (203) is inserted into the right-angle through hole (204) to control the start and stop of the first in-position switch (215) by driving the trapezoidal block (207) to move horizontally.

4. A rotary valve according to claim 2, characterized in that: The early warning agencies also include: A guide sleeve (218) fixedly connected to the outer wall of the valve cover (104), a lifting bracket (209) being slidably connected to the guide sleeve (218), a top of the lifting bracket (209) extending above the guide sleeve (218) and fixedly connected to a warning bell (210); A transmission assembly, the transmission assembly being arranged at the bottom of the guide sleeve (218), and the lifting bracket (209) is driven to rise by the transmission assembly when the trapezoidal block (207) moves laterally; A bell core sleeve (214), the bell core sleeve (214) is located directly below the warning bell (210) and is fixedly connected to the top of the guide sleeve (218), a truncated cone groove (216) is provided at the top of the bell core sleeve (214), and a hemispherical groove (217) adapted to the bell core inside the warning bell (210) is provided at the bottom of the truncated cone groove (216).

5. A rotary valve according to claim 4, characterized in that: The transmission assembly comprises a bevel rod (211), one end of the bevel rod (211) extends into the interior of the valve cover (104), and the other end of the bevel rod (211) extends into the interior of the guide sleeve (218); a caster (213) is fixedly connected to the bottom end of the lifting bracket (209), and a second elastic member (212) is fixedly connected between the bevel rod (211) and the bottom of the guide sleeve (218).

6. A rotary valve according to claim 5, characterized in that: An upper spring seat (109) for supporting a rigid spring (202) is slidably connected to the top of the inner cavity of the valve cover (104), a nut seat (401) is fixedly connected to the top port of the valve cover (104), an adjusting screw (400) is threadedly connected to the inner side of the nut seat (401), the bottom of the adjusting screw (400) is movably plugged into the middle of the upper spring seat (109), a sealing gasket (105) is provided between the valve cover (104) and the valve body (100), and a fastener (106) for locking and fixing the two is plugged into the end between the valve cover (104) and the valve body (100).

7. A rotary valve according to claim 6, characterized in that: A protective sleeve (107) is provided at the top of the valve cover (104) and is located at the outer position of the adjusting screw (400). A positioning block (402) is fixedly connected to the top of the inner side of the protective sleeve (107). The middle part of the bottom end of the positioning block (402) is in the shape of an upwardly concave groove and is slidably connected to a positioning sleeve (403). A third elastic member (404) is fixedly connected between the positioning sleeve (403) and the top of the groove.

8. A rotary valve according to claim 7, characterized in that: The top of the nut seat (401) is provided with an annular groove (405) with an L-shaped cross section, the top of the inner wall of the annular groove (405) close to the protective sleeve (107) is fixedly connected with an inner tooth ring (406), an L-shaped clamping block (407) is movably connected in the annular groove (405), the side of the L-shaped clamping block (407) close to the inner tooth ring (406) is fixedly connected with an outer tooth block (408), an unlocking handle (409) is slidably connected to the side wall of the protective sleeve (107), a pressing spring (410) is fixedly connected between the end of the unlocking handle (409) and the outer wall of the protective sleeve (107), and one end of the unlocking handle (409) is fixedly connected to the top of the L-shaped clamping block (407).

9. A rotary valve according to claim 8, characterized in that: A one-way oil return passage (300) connected to the oil return passage (103) is provided on the inner wall of the valve body (100) at a position above the one-way oil return passage (103); a mounting groove (302) connected to the outside is provided on the inner wall of the valve body (100) at a position above the one-way oil return passage (300); a cone head connecting rod (301) is slidably connected in the mounting groove (302); the cone head connecting rod (301) is away from the valve body (100). A spring stopper (303) is fixedly connected to the end of the inner cavity of the valve body (100); a second in-position switch (305) is fixedly installed at a position corresponding to the outer wall of the valve body (100) and the mounting groove (302); a return spring (304) is fixedly connected between the spring stopper (303) and the second in-position switch (305); and the end of the conical connecting rod (301) away from the spring stopper (303) is truncated cone-shaped and extends into the inner cavity of the valve body (100).

10. A rotary valve manufacturing process, characterized in that: The following steps are involved: Step 1: Select corresponding manufacturing materials according to the use environment of the oil return valve, wherein the material of the valve body (100) includes but is not limited to alloy steel, carbon steel or stainless steel, and the valve core (108) and other components are made of corrosion-resistant and wear-resistant materials; Step 2, designing a production drawing of the rotary valve, determining the shape and size of the valve body, valve core and other components of the rotary valve, and producing the valve body (100), valve core (108) and other components by forging, casting or machining; Step 3, precision machining the blank obtained in step 2 to ensure that the size accuracy and surface roughness of the blank meet the design requirements, wherein the precision machining includes but is not limited to turning, milling and grinding; Step 4, performing surface treatment on the precision machined blank in step 3 to improve the corrosion resistance and surface quality of the valve body (100), valve core (108) and other components, wherein the surface treatment includes but is not limited to spraying, painting and electroplating. Step 5, assemble the valve body (100), valve core (108) and other component structures processed in step 4 to obtain a complete rotary valve, and inspect the assembled rotary valve. The inspection categories include but are not limited to sealing tests and functional tests.

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