Hydraulic solenoid valve assembly and hot runner system

Abstract

The present invention discloses a hydraulic solenoid valve assembly and a hot runner system. The hydraulic solenoid valve assembly includes an integrated block and a reversing valve. An oil circuit is formed in the integrated block. The oil circuit includes an oil inlet channel and an oil return channel. A filtering mechanism and a pressure reducing mechanism are sequentially arranged on the oil inlet channel. The valve body of the reversing valve is arranged against the integrated block, the oil circuit is connected, the oil receiving hole is connected to the oil cylinder, and the solenoid valve control valve core selectively conducts the oil circuit between the oil inlet hole and one of its oil receiving holes, and the other oil receiving hole and the oil outlet hole. The hydraulic solenoid valve assembly has a high degree of integration and occupies a small space. The integrated block realizes the process from oil intake, filtration, pressure reduction, to oil delivery to the reversing valve. The reversing valve has a compact structure, which reduces the volume of the entire valve group. The oil is then returned to the integrated block to realize the oil circuit circulation of the entire valve group. The working process is stable and reliable, which is conducive to injection molding production and manufacturing.

Description

Technical Field

[0001] The present invention relates to an oil pressure solenoid valve assembly, and in particular to a hot runner system having the oil pressure solenoid valve assembly. Background Art

[0002] During injection molding, the gate opening and closing of the mold gate is controlled by the up and down movement of the gate valve needle. The piston moves up and down in the oil cylinder, driving the gate valve needle to move up and down. The oil flow direction in the oil cylinder is controlled by the oil pressure solenoid valve assembly to change the movement direction of the piston. The oil pressure solenoid valve assembly in the existing technology is large in size and occupies a lot of space. Summary of the Invention

[0003] In order to solve the problems in the prior art, an object of the present invention is to provide a hydraulic solenoid valve assembly and a hot runner system.

[0004] To achieve the above-mentioned object, one embodiment of the present invention provides a hydraulic solenoid valve assembly for controlling the movement of a piston in a cylinder. The hydraulic solenoid valve assembly includes:

[0005] An integrated block having an oil passage formed therein, the oil passage comprising an oil inlet passage and an oil return passage, the oil inlet passage communicating with the oil inlet and the oil outlet, the oil return passage communicating with the oil outlet and the oil inlet, an oil inlet direction being formed from the oil inlet to the oil outlet, and an oil outlet direction being formed from the oil inlet to the oil outlet, and a filtering mechanism and a pressure reducing mechanism being sequentially provided on the oil inlet passage along the oil inlet direction;

[0006] At least one reversing valve, the reversing valve includes a valve body, a valve core and a solenoid valve, the valve body includes an oil inlet, an oil outlet and two oil receiving holes, the valve body is arranged in close contact with the integrated block, the oil outlet is connected to the oil inlet, the oil inlet is connected to the oil outlet, the oil receiving hole is connected to the oil cylinder, and the solenoid valve controls the valve core to selectively connect the oil circuit between the oil inlet and one of its oil receiving holes, as well as the other oil receiving hole and the oil outlet.

[0007] As a further improvement of the present invention, a filter inlet and a filter outlet are provided on the oil inlet channel, and the filter mechanism includes a filter provided between the filter inlet and the filter outlet, and a fixing block and an elastic member for fixing the filter to the integrated block;

[0008] The filter is barrel-shaped and includes a barrel wall, an opening and a barrel bottom. The barrel wall forms a filter layer, the opening cover is provided with the filter outlet, the elastic member is compressed and abuts between the fixed block and the barrel bottom, and the fixed block is detachably connected to the integrated block.

[0009] As a further improvement of the present invention, a pressure reducing hole is provided on the manifold block, the pressure reducing mechanism includes a pressure reducing valve slidably connected to the pressure reducing hole, the oil inlet passage includes a pressure reducing inlet and a pressure reducing outlet, and a pressure reducing oil circuit provided in the pressure reducing valve and communicating with the pressure reducing inlet and the pressure reducing outlet, and the oil pressure flowing out of the pressure reducing oil circuit is adjustable;

[0010] The pressure reducing valve includes an oil return circuit, which communicates with the pressure reducing inlet and the oil return channel.

[0011] As a further improvement of the present invention, a plurality of oil pressure detection branches are provided downstream of the pressure reducing outlet, and the pressure reducing mechanism further comprises an oil pressure gauge connected to the oil pressure detection branches.

[0012] As a further improvement of the present invention, the reversing valve includes a valve core hole arranged in the valve body, the valve core is arranged in the valve core hole, the oil inlet hole is connected to one of the oil receiving holes through the valve core hole, and the other oil receiving hole is connected to the oil outlet hole through the valve core hole.

[0013] As a further improvement of the present invention, a plurality of the reversing valves are provided, the oil inlet hole and the oil outlet hole both pass through the valve body, and the oil inlet holes of adjacent reversing valves are arranged opposite to each other, and the oil outlet holes are arranged opposite to each other.

[0014] As a further improvement of the present invention, the oil inlet and the oil outlet are provided on both sides of the integrated block, and the reversing valve is provided on both sides of the integrated block.

[0015] As a further improvement of the present invention, a sealing layer is provided between adjacent reversing valves and between the reversing valve and the integrated block.

[0016] As a further improvement of the present invention, the invention further comprises a baffle, wherein the baffle seals the oil outlet and oil inlet of the reversing valve adjacent thereto;

[0017] Each reversing valve is provided with a fixing hole penetrating the valve body, the integrated block is provided with a connecting hole, a fixing rod passes through the baffle and sequentially passes through several reversing valves until it is fixedly connected with the connecting hole.

[0018] To achieve one of the above-mentioned objects of the invention, an embodiment of the present invention provides a hot runner system, comprising the above-mentioned oil pressure solenoid valve assembly, and also comprising an oil cylinder and a piston.

[0019] Compared with the prior art, the present invention has the following beneficial effects: the oil pressure solenoid valve assembly has a high degree of integration and occupies a small space. The integrated block realizes the steps from oil intake, filtration, pressure reduction, to sending the oil into the reversing valve. The structure of the reversing valve is compact, which reduces the volume of the entire valve group. The oil is then sent back to the integrated block to realize the circulation of the oil circuit of the entire valve group. The working process is stable and reliable, which is conducive to the production and manufacturing of injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 1 is a schematic structural diagram of an oil pressure solenoid valve assembly according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic structural diagram of an integrated block according to an embodiment of the present invention;

[0022] Figure 3 is a cross-sectional view of an integrated block according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the internal oil circuit of a manifold block according to an embodiment of the present invention;

[0024] Figure 5 yes Figure 4 Cross-sectional view in the AA direction;

[0025] Figure 6 yes Figure 4 Cross-sectional view in the middle BB direction;

[0026] Figure 7 yes Figure 4 Cross-sectional view in CC direction;

[0027] Figure 8 1 is a schematic structural diagram of a reversing valve according to an embodiment of the present invention;

[0028] Figure 9 is a cross-sectional view of a reversing valve according to an embodiment of the present invention;

[0029] Among them, 1. Manifold; 11. Filter mechanism; 111. Filter; 1111. Barrel wall; 1112. Barrel bottom; 1113. Opening; 112. Elastic member; 113. Fixing block; 1131. Nut; 12. Pressure reducing mechanism; 121. Pressure reducing valve; 122. Oil pressure gauge; 13. Pressure reducing hole; 14. Oil inlet channel; 141. Oil inlet; 142. Oil outlet; 143. Filter inlet; 144 , filter outlet; 145, pressure reducing inlet; 146, pressure reducing outlet; 15, oil return channel; 151, oil circuit outlet; 152, oil inlet; 16, oil pressure detection branch; 17, connecting hole; 18, mounting hole; 2, reversing valve; 21, valve body; 22, valve core hole; 23, solenoid valve; 24, oil inlet hole; 25, oil outlet hole; 26, oil connecting hole; 27, fixing hole; 28, fixing rod; 29, cylinder tube. DETAILED DESCRIPTION

[0030] The present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by those skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0031] It should be understood that the terms used herein, such as "upper," "above," "lower," and "below," etc., indicating spatial relative positions, are used for ease of explanation to describe the relationship of one element or feature relative to another element or feature as shown in the accompanying drawings. Spatially relative terms may be intended to encompass different orientations of the device in use or operation other than the orientation shown in the drawings.

[0032] An embodiment of the present invention provides a hydraulic solenoid valve assembly and a hot runner system. The hot runner system includes a hydraulic solenoid valve assembly, a cylinder, a mold system, etc. The hydraulic solenoid valve assembly is used to control the movement of the piston in the cylinder. The hydraulic solenoid valve assembly of the present invention has a high degree of integration, a compact structure and a small size. While realizing the oil supply to the reciprocating stroke of the cylinder, it also ensures the control of necessary production factors such as the cleanliness of the hydraulic oil and the controllable pressure.

[0033] like Figure 1 As shown, the oil pressure solenoid valve assembly includes an integrated block 1 and a reversing valve 2. The integrated block 1 of this embodiment is roughly in the shape of a rectangular parallelepiped. For the convenience of description, the relative direction of the reversing valve 2 and the integrated block 1 is set to the left and right directions, that is, the reversing valve 2 can be set on the left and / or right side of the integrated block 1. The integrated block 1 includes an upper bottom surface, a lower bottom surface, a front and a back. Of course, the integrated block 1 can also be set to other shapes.

[0034] Specifically, if Figures 2 to 7As shown, an oil circuit is formed in the manifold 1. The oil circuit includes an oil inlet channel 14 and an oil return channel 15. The oil inlet channel 14 connects the oil circuit inlet 141 and the oil outlet 142, while the oil return channel 15 connects the oil circuit outlet 151 and the oil inlet 152. The oil inlet direction is from the oil circuit inlet 141 to the oil outlet 142, and the oil outlet direction is from the oil inlet 152 to the oil circuit outlet 151. Hydraulic oil is input into the manifold 1 from the oil circuit inlet 141, and the hydraulic oil flows in the oil inlet channel 14 along the oil inlet direction until it flows out of the oil outlet 142. The hydraulic oil flowing out of the oil outlet 142 enters other components (the reversing valve 2 below), flows out of the other components, enters the oil inlet 152, and flows in the oil return channel 15 along the oil outlet direction until it flows out of the oil circuit outlet 151, completing the oil circuit circulation in the manifold 1.

[0035] Along the oil inlet direction, a filtering mechanism 11 and a pressure reducing mechanism 12 are sequentially arranged on the oil inlet channel 14. The filtering mechanism 11 is used to filter impurities in the hydraulic oil to prevent impurities from entering the downstream devices. The pressure reducing mechanism 12 is used to adjust the oil pressure of the downstream devices to achieve control of the injection molding gate.

[0036] At least one reversing valve 2 is provided, such as Figures 8 and 9 As shown, the reversing valve 2 includes a valve body 21, a valve core and a solenoid valve 23. The solenoid valve 23 controls the movement of the valve core in the valve body 21. The valve body 21 includes an oil inlet 24, an oil outlet 25 and two oil receiving holes 26. The valve body 21 is arranged close to the integrated block 1. The oil outlet 142 is connected to the oil inlet 24, and the oil inlet 152 is connected to the oil outlet 25. The oil inlet 24 of the valve body 21 is connected to the hydraulic oil from the oil outlet 142 of the integrated block 1. The hydraulic oil that needs to be discharged from the valve body 21 flows out from the oil outlet 25 to the oil inlet 152 of the integrated block 1. The oil receiving hole 26 is connected to the oil cylinder through the cylinder pipe 29. The solenoid valve 23 controls the valve core to selectively conduct the oil circuit between the oil inlet 24 and one of its oil receiving holes 26, as well as the other oil receiving hole 26 and the oil outlet 25.

[0037] The oil cylinder includes a piston, which reciprocates in the oil cylinder. The piston divides the air in the oil cylinder into an upper chamber and a lower chamber. One oil receiving hole 26 is connected to the upper chamber of the oil cylinder through a cylinder tube 29, and the other oil receiving hole 26 is connected to the lower chamber of the oil cylinder through a cylinder tube 29. When one oil receiving hole 26 is connected to the oil inlet hole 24, the oil entering from the oil inlet hole 24 flows into the oil receiving hole 26. If the hydraulic oil is input into the upper chamber of the oil cylinder through the oil receiving hole 26, the hydraulic oil in the lower chamber of the oil cylinder is squeezed into the other oil receiving hole 26. The oil in the upper chamber of the oil cylinder is squeezed into the oil return channel 15. When the valve core reciprocates, the oil receiving hole 26 is controlled to switch between the oil inlet hole 24 and the oil outlet hole 25, so as to realize the reciprocating motion of the piston in the oil cylinder and complete the circulation of the hydraulic oil of the entire oil pressure solenoid valve assembly.

[0038] The integrated block 1 realizes the supply and outflow of the oil circuit of the reversing valve 2, as well as the filtration of the hydraulic oil and the adjustment of the oil pressure. It has a compact structure, high production efficiency and low cost.

[0039] Furthermore, a filter inlet 143 and a filter outlet 144 are provided on the oil inlet channel 14, and the filter mechanism 11 includes a filter 111 provided between the filter inlet 143 and the filter outlet 144, and a fixing block 113 and an elastic member 112 for fixing the filter 111 to the integrated block 1;

[0040] Of course, the filter 111 can also be fixed to the integrated block 1 only through the fixing block 113, a fixing part, so that the oil flowing out of the filter inlet 143 needs to be filtered by the filter 111 before entering the filter outlet 144, and the filter 111 removes particles in the hydraulic oil.

[0041] In order to facilitate regular cleaning of the filter screen of the filter 111, or to replace the filter screen with a new one, and to achieve a better filtering effect, the filter 111 is barrel-shaped, including a barrel wall 1111, an opening 1113 and a barrel bottom 1112. Figure 3 As shown, the barrel wall 1111 forms a filter layer, and the opening 1113 is covered with a filter outlet 144. In this embodiment, the filter mechanism 11 is arranged above the integrated block 1 and is installed on the upper bottom surface of the integrated block 1. An opening can be dug out on the upper bottom surface of the integrated block 1. The filter inlet 143 and the filter outlet 144 are both arranged at the bottom of this opening. When installing the filter 111, first face the opening 1113 of the filter 111 downward and buckle it on the filter outlet 144. The filter inlet 143 is outside the filter 111, so that the oil flowing out of the filter inlet 143 needs to pass through the barrel wall 1111 of the filter 111 before entering the filter outlet 144.

[0042] At this point, elastic member 112 is positioned above filter 111, and fixed block 113 is positioned above elastic member 112. Elastic member 112 is compressed and rests between fixed block 113 and bottom 1112 of filter 111. Fixed block 113 is detachably connected to manifold 1. Elastic member 112 is compressed, with one end resting against fixed block 113 and the other end against bottom 1112 of filter 111, pressing filter 111 against manifold 1. This prevents hydraulic oil from flowing out of filter inlet 143 through opening 1113 and into filter outlet 144. The detachable connection can be achieved through a snap-fit ​​connection, a threaded connection, or other methods. A sealing ring can be provided at both opening 1113 of filter 111 and the point where fixed block 113 connects to manifold 1 to prevent hydraulic oil leakage. A nut 1131 can be provided on the top of fixed block 113. When filter 111 needs to be replaced, the nut 1131 can be rotated to open fixed block 113 and remove filter 111.

[0043] Furthermore, if Figure 3 As shown, a pressure-reducing hole 13 is provided on the manifold 1. The pressure-reducing mechanism 12 includes a pressure-reducing valve 121 slidably connected to the pressure-reducing hole 13. The oil inlet channel 14 includes a pressure-reducing inlet 145 and a pressure-reducing outlet 146, as well as a pressure-reducing oil circuit provided in the pressure-reducing valve 121 and connecting the pressure-reducing inlet 145 and the pressure-reducing outlet 146. The oil pressure flowing out of the pressure-reducing oil circuit is adjustable. An adjusting knob is provided at one end of the pressure-reducing valve 121 facing outward. A spring is provided in the pressure-reducing valve 121. By rotating the adjusting knob, the spring force changes, thereby changing the oil pressure flowing out of the pressure-reducing oil circuit. The greater the spring force, the less oil flows out of the pressure-reducing valve 121, and the lower the oil pressure flowing out to the pressure-reducing outlet 146. The lower the spring force, the more oil flows out of the pressure-reducing valve 121, and the higher the oil pressure at the pressure-reducing outlet 146. The pressure-reducing valve 121 also includes an oil return circuit, which connects the pressure-reducing inlet 145 and the oil return channel 15. The hydraulic oil that does not flow to the pressure reducing outlet 146 flows out into the oil return passage 15 through the oil return oil path.

[0044] In addition, a plurality of oil pressure detection branches 16 are provided downstream of the pressure reducing outlet 146. The pressure reducing mechanism 12 further includes an oil pressure gauge 122 connected to the oil pressure detection branch 16. In this embodiment, Figure 1 、 2As shown in Figure 7, two oil pressure detection branches 16 are provided, and the oil pressure gauge 122 connected to one of them is provided on the side of the integrated block 1, especially on the same side as the pressure reducing valve 121, so that the pressure reducing valve 121 can be adjusted while facing the oil pressure gauge 122, which is convenient for adjustment according to the demand of oil pressure. In addition, the outlet of the oil pressure detection branch 16 is also provided on the top of the integrated block 1, which can be connected to the external oil pressure gauge 122 through an oil pipe, so that the oil pressure is convenient for checking the oil pressure at other positions. The oil pressure detected by the oil pressure gauge 122 is the oil pressure after being reduced by the pressure reducing valve 121 and before flowing out to the reversing valve 2.

[0045] The reversing valve 2 includes a valve core hole 22 arranged in the valve body 21, the valve core is arranged in the valve core hole 22, the oil inlet hole 24 is connected to one of the oil receiving holes 26 through the valve core hole 22, and the other oil receiving hole 26 is connected to the oil outlet hole 25 through the valve core hole 22. The valve core moves back and forth in the valve core hole 22 to control the oil inlet hole 24 to connect to different oil receiving holes 26 through the valve core hole 22.

[0046] In addition, multiple reversing valves 2 are provided, and the oil inlet hole 24 and the oil outlet hole 25 both pass through the valve body 21. The oil inlet holes 24 and the oil outlet holes 25 of adjacent reversing valves 2 are relatively arranged, and the hydraulic oil flowing out of the integrated block 1 partially flows into the valve core hole 22 inside the valve body 21 from the oil inlet hole 24 on the side of the valve body 21, and the other hydraulic oil passes through the reversing valve 2 and enters the next reversing valve 2. This arrangement has a compact structure, and no oil pipe connection is required between the reversing valves 2. When it is necessary to increase or decrease the reversing valves 2, other reversing valves 2 are directly added or decreased on the outside of the reversing valve 2 at the end, which facilitates the expansion of the number of reversing valves 2 in this structure and realizes the production requirements of different numbers of reversing valves 2.

[0047] Furthermore, an oil inlet 152 and an oil outlet 142 are provided on both sides of the integrated block 1, and a reversing valve 2 is provided on both sides of the integrated block 1. Preferably, if the number of reversing valves 2 is an even number, the number of reversing valves 2 on both sides is the same. If it is an odd number, one side can have one less than the other side. This arrangement makes the oil pressure inside the reversing valves 2 on both sides as equal as possible, avoiding the problem in some existing designs that multiple reversing valves 2 are arranged in sequence, the oil pressure in the reversing valve 2 closest to the oil inlet 152 is high, and the oil pressure at the end is low. The integrated block 1 of the present application is arranged in the middle, and the reversing valves 2 on both sides are symmetrically arranged, so the oil pressure difference between the multiple reversing valves 2 is very small.

[0048] In addition, sealing layers are provided between adjacent reversing valves 2 and between the reversing valves 2 and the integrated block 1, so that the hydraulic oil will not flow out when it flows out of the integrated block 1 or flows between adjacent reversing valves 2. When a new reversing valve 2 is added, a corresponding number of sealing layers are added at the same time. The sealing layer can be an O-shaped sealing ring.

[0049] And, the oil pressure solenoid valve assembly also includes a baffle, such as Figure 1 As shown, the baffle seals the oil outlet hole 25 and the oil inlet hole 24 of the adjacent reversing valve 2, so that oil will not flow out from the oil inlet hole 24 and the oil outlet hole 25 of the end reversing valve 2. When adding or removing the reversing valve 2, the baffle is removed for installation. After installation, the baffle is installed again to achieve sealing of the oil circuit.

[0050] Each reversing valve 2 is provided with a fixing hole 27 penetrating the valve body 21, and the integrated block 1 is provided with a connecting hole 17. The fixing rod 28 passes through the baffle and sequentially passes through several reversing valves 2 until it is fixedly connected with the connecting hole 17. The corresponding components are shown in FIG. Figure 1 、 2 In , 4, 8, and 9, when adding or subtracting the reversing valve 2, first remove the fixing rod 28, then remove the baffle, then add or subtract the required number of reversing valves 2, and then install the baffle. The fixing rod 28 passes through the fixing holes 27 on the baffle and the reversing valve 2 in sequence until it is fixedly connected to the connecting hole 17 on the integrated block 1. The fixing hole 27 can be set as a through hole, the connecting hole 17 can be set as a threaded hole, and the fixing rod 28 can be set as a threaded rod with a thread set at the end. The threaded rod is screwed to the threaded hole. Different numbers of reversing valves 2 correspond to fixed rods 28 of different lengths.

[0051] Furthermore, a mounting hole 18 is provided at the bottom of the integrated block 1, such as Figure 7 As shown, it is used to fix the oil pressure solenoid valve assembly with other devices.

[0052] Compared with the prior art, this embodiment has the following beneficial effects:

[0053] (1) The oil pressure solenoid valve assembly has a high degree of integration and occupies a small space. Through the integrated block 1, the oil is fed, filtered, and decompressed until the oil is sent to the reversing valve 2. The reversing valve 2 has a compact structure, which reduces the volume of the entire valve group. The oil is then sent back to the integrated block 1 to realize the oil circuit circulation of the entire valve group. The working process is stable and reliable, which is conducive to the production and manufacturing of injection molding.

[0054] (2) The number of reversing valves 2 can be increased or decreased according to production requirements, which facilitates the oil pressure solenoid valve assembly to be applicable to the requirements of injection molding parameters of different specifications. When it is necessary to increase or decrease, the baffle is removed, the reversing valve 2 is increased or decreased, and then the baffle is covered. The operation is simple.

[0055] (3) Reversing valves 2 are symmetrically arranged on the left and right sides of the integrated block 1, so that the hydraulic oil starting from the middle is supplied to the left and right sides at the same time. When multiple reversing valves 2 are arranged, the oil pressure difference between the reversing valves 2 is reduced, so that the pistons of different oil cylinders move in unison and the casting is more stable.

[0056] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0057] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hydraulic solenoid valve assembly, which is used to control the movement of a piston in a cylinder, characterized in that: The oil pressure solenoid valve assembly includes: An integrated block (1) is formed with an oil passage therein, the oil passage comprising an oil inlet passage (14) and an oil return passage (15); the oil inlet passage (14) is connected to an oil inlet (141) and an oil outlet (142); the oil return passage (15) is connected to an oil outlet (151) and an oil inlet (152); an oil inlet direction is formed from the oil inlet (141) to the oil outlet (142); and an oil outlet direction is formed from the oil inlet (152) to the oil outlet (151); and a filtering mechanism (11) and a pressure reducing mechanism (12) are sequentially provided on the oil inlet passage (14) along the oil inlet direction; At least one reversing valve (2), the reversing valve (2) comprising a valve body (21), a valve core and a solenoid valve (23), the valve body (21) comprising an oil inlet hole (24), an oil outlet hole (25) and two oil receiving holes (26), the valve body (21) being arranged close to the integrated block (1), the oil outlet (142) being connected to the oil inlet hole (24), the oil inlet (152) being connected to the oil outlet hole (25), the oil receiving hole (26) being connected to the oil cylinder, and the solenoid valve (23) controlling the valve core to selectively conduct the oil path between the oil inlet hole (24) and one of the oil receiving holes (26), and between the other oil receiving hole (26) and the oil outlet hole (25); The reversing valve (2) includes a valve core hole (22) arranged in the valve body (21), the valve core is arranged in the valve core hole (22), the oil inlet hole (24) is connected to one of the oil receiving holes (26) through the valve core hole (22), and the other oil receiving hole (26) is connected to the oil outlet hole (25) through the valve core hole (22); a plurality of reversing valves (2) are provided, the oil inlet hole (24) and the oil outlet hole (25) both pass through the valve body (21), and the oil inlet holes (24) and the oil outlet holes (25) of adjacent reversing valves (2) are arranged opposite to each other; the oil inlet port (152) and the oil outlet port (142) are both arranged on both sides of the integrated block (1), and the reversing valves (2) are both provided on both sides of the integrated block (1).

2. The oil pressure solenoid valve assembly according to claim 1, characterized in that: The oil inlet channel (14) is provided with a filter inlet (143) and a filter outlet (144); the filter mechanism (11) comprises a filter (111) provided between the filter inlet (143) and the filter outlet (144), and a fixing block (113) and an elastic member (112) for fixing the filter (111) to the integrated block (1); The filter (111) is barrel-shaped and comprises a barrel wall (1111), an opening (1113) and a barrel bottom (1112); the barrel wall (1111) forms a filter layer; the opening (1113) covers the filter outlet (144); the elastic member (112) is compressed and abuts between the fixed block (113) and the barrel bottom (1112); and the fixed block (113) is detachably connected to the integrated block (1).

3. The oil pressure solenoid valve assembly according to claim 1, characterized in that: A pressure reducing hole (13) is provided on the integrated block (1), the pressure reducing mechanism (12) includes a pressure reducing valve (121) slidably connected to the pressure reducing hole (13), the oil inlet channel (14) includes a pressure reducing inlet (145) and a pressure reducing outlet (146), and a pressure reducing oil circuit provided in the pressure reducing valve (121) and communicating with the pressure reducing inlet (145) and the pressure reducing outlet (146), and the oil pressure flowing out of the pressure reducing oil circuit is adjustable; The pressure reducing valve (121) comprises an oil return circuit, wherein the oil return circuit is connected to the pressure reducing inlet (145) and the oil return channel (15).

4. The oil pressure solenoid valve assembly according to claim 3, characterized in that: A plurality of oil pressure detection branches (16) are provided downstream of the pressure reducing outlet (146), and the pressure reducing mechanism (12) further comprises an oil pressure gauge (122) connected to the oil pressure detection branches (16).

5. The oil pressure solenoid valve assembly according to claim 1, characterized in that: Sealing layers are provided between adjacent reversing valves (2) and between the reversing valves (2) and the integrated block (1).

6. The oil pressure solenoid valve assembly according to claim 1, characterized in that: It also includes a baffle, which seals the oil outlet hole (25) and the oil inlet hole (24) of the reversing valve (2) adjacent to it; Each reversing valve (2) is provided with a fixing hole (27) penetrating the valve body (21), the integrated block (1) is provided with a connecting hole (17), and a fixing rod (28) passes through the baffle and sequentially passes through several reversing valves (2) until it is fixedly connected with the connecting hole (17).

7. A hot runner system, characterized in that: The invention comprises the oil pressure solenoid valve assembly according to any one of claims 1 to 6, and further comprises an oil cylinder and a piston.

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