A hydraulic one-way shut-off quick-insertion valve and a rapid pressurized injection oil circuit

Abstract

A hydraulic one-way shutoff quick-install valve comprises a valve body and a valve core assembly. The valve body is provided with a mounting cavity, and a first opening and a second opening are provided on the sidewall of the mounting cavity. The valve core assembly is installed in the mounting cavity and comprises a first valve head and a second valve head in sliding connection. A support spring is provided between the first and second valve heads to abut the first valve head against the first opening. The second opening is arranged between the first and second valve heads. The on-off state of the cartridge valve is changed by controlling the valve core assembly to establish the connection between the first and second openings, thereby enabling the oil inlet valve to function as a high-pressure isolation valve, thereby simplifying the structure of the injection oil circuit and reducing oil circuit costs.

Description

Technical Field

[0001] The invention belongs to the technical field of rapid pressurization and injection oil circuits, and in particular relates to a hydraulic one-way cut-off quick-insertion valve and a rapid pressurization and injection oil circuit. Background Art

[0002] Aluminum alloy high-pressure casting is a casting method in which molten or semi-molten aluminum alloy is rapidly filled into the mold cavity, cooled under pressure, and finally formed into a casting product. Rapid filling of the molten aluminum during the injection process requires a specialized oil circuit structure. The main disadvantage of the rapid pressurization injection oil circuits currently available on the market is that the oil in the fast accumulator must pass through multiple valve bodies before entering the injection cylinder. Each valve has a stagnation period during the opening process. This stagnation period is the time required for the oil to fill the valve body and drive the valve core movement within the valve body. Since each valve body has a stagnation period during oil circuit operation, the opening speed of the entire oil circuit is slowed down, and the oil inlet pressure is also lost. This limits the acceleration of the injection cylinder piston rod during the rapid injection action, affecting the casting of the casting product. Summary of the Invention

[0003] In view of the above shortcomings, the technical problem to be solved by the present invention is to provide a hydraulic one-way cut-off quick-insertion valve and a rapid pressurization injection oil circuit, which are used to simplify the rapid pressurization injection oil circuit and improve the injection acceleration of the rapid pressurization injection oil circuit.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A hydraulic one-way shut-off quick-install valve comprises a valve body with an installation cavity provided therein, and a first opening and a second opening provided on the side wall of the installation cavity; a valve core assembly installed in the valve body, the valve core assembly comprising a first valve head and a second valve head in sliding connection, a support spring being provided between the first valve head and the second valve head to abut the first valve head against the first opening, and the second opening being arranged between the first valve head and the second valve head.

[0006] As a preferred solution of the present invention, a guide hole is provided in the second valve head, the first valve head is slidingly connected to the guide hole, a spring hole is provided in the first valve head, and both ends of the support spring are respectively in contact with the guide hole and the spring hole.

[0007] As a preferred solution of the present invention, a through hole is provided on the side wall of the first valve head, and the through hole is communicated with the spring hole.

[0008] As a preferred solution of the present invention, the first valve head is radially sealed with the installation cavity, and the first valve head and the installation cavity are axially slidingly connected, the first valve head is radially sealed with the guide hole, and the first valve head and the guide hole are axially slidingly connected.

[0009] As a preferred solution of the present invention, a sealing step is provided on the inner side of the first opening, a sealing slope is provided on the sealing step, and the first valve head is adapted to the sealing slope.

[0010] As a preferred solution of the present invention, the valve body is further provided with a pilot oil inlet hole and a pilot oil drain hole, and the second valve head abuts against the pilot oil inlet hole and the pilot oil drain hole.

[0011] A fast pressurized injection oil circuit comprises an injection-boosting oil cylinder, a slow injection fluid circuit, a fast injection fluid circuit, a pressurizing fluid circuit and the above-mentioned hydraulic one-way cut-off quick cartridge valve. The slow injection fluid circuit and the pressurizing fluid circuit are connected to the injection-boosting oil cylinder, and the fast injection fluid circuit is connected to the injection-boosting oil cylinder via the hydraulic one-way cut-off quick cartridge valve.

[0012] As a preferred solution of the present invention, the fast injection flow path includes a fast accumulator and a pilot valve assembly, the fast accumulator is connected to the first opening, the second opening is connected to the injection booster cylinder, and the pilot valve assembly is connected to the installation cavity.

[0013] As a preferred solution of the present invention, the pilot valve assembly includes a pressure-injection fast oil discharge pilot valve and a pressure-injection fast oil feed pilot valve, and the pressure-injection fast oil discharge pilot valve and the pressure-injection fast oil feed pilot valve are respectively connected to the installation cavity on one side of the second valve head.

[0014] As a preferred solution of the present invention, the injection booster oil cylinder includes an injection oil cylinder and a booster oil cylinder, both of which are provided with piston rods, and the second opening is connected to the rodless cavity of the injection oil cylinder.

[0015] The beneficial effects of the present invention are as follows: (1) the on-off state of the cartridge valve is changed by controlling the valve core assembly to realize the connection state of the first opening and the second opening, so that the oil inlet valve has the function of a high-pressure isolation valve, thereby simplifying the structure of the injection oil circuit and reducing the oil circuit cost.

[0016] (2) The oil circuit structure is simplified by using a hydraulic one-way shut-off quick-insert valve, which reduces the number of valve bodies through which the oil flows and the time required for the oil to fill the valve body. This reduces the time required for the oil circuit structure function to change and increases the effect speed of the injection oil circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the rapid pressurization injection oil circuit.

[0018] Figure 2 It is a structural diagram of a hydraulic one-way shut-off quick-install valve.

[0019] Figure numerals: system oil source 1, slow pressure injection flow path 2, slow pressure injection oil inlet main valve 2-1, slow pressure injection oil inlet shuttle valve 2-2, slow pressure injection oil inlet pilot valve 2-3, slow pressure injection check valve 3, pressure injection booster cylinder 4, pressure injection cylinder 4-1, booster cylinder 4-2, fast accumulator 5, fast pressure injection flow path 6, hydraulic one-way stop fast cartridge valve 6-1, pressure injection fast oil inlet pilot valve 6-2, pressure injection fast oil discharge pilot valve 6-3, booster accumulator 8, booster flow path 9, booster inlet Oil main valve 9-1, boost oil inlet pilot valve 9-2, return hammer flow path 10, return hammer oil inlet main valve 10-1, return hammer oil inlet pilot valve 10-2, return hammer oil inlet check valve 11, quick oil drain valve 12, quick oil drain main valve 12-1, quick oil drain pilot valve 12-2, return hammer oil return valve 13, return hammer oil return main valve 13-1, return hammer oil return pilot valve 13-2, boost cylinder oil return valve 14, boost cylinder oil return main valve 14-1, boost cylinder oil return pilot valve 14-2, oil tank 15;

[0020] Valve sleeve 6-11, valve pressure cover 6-12, first valve head 6-111, support spring 6-112, second valve head 6-113, sealing slope 6-114, first opening 6-115, second opening 6-116, mounting cavity 6-117, guide hole 6-118, spring hole 6-119, through hole 6-120, oil guide groove 6-121, pilot oil inlet hole 6-122, pilot oil drain hole 6-123. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] A hydraulic one-way shut-off quick-install valve comprises a valve body and a valve core assembly, wherein a mounting cavity 6-117 is provided in the valve body, and a first opening 6-115 and a second opening 6-116 are provided on the side wall of the mounting cavity 6-117; the valve core assembly is installed in the mounting cavity 6-117, and the valve core assembly comprises a first valve head 6-111 and a second valve head 6-113 which are slidably connected, and a supporting spring 6-112 is provided between the first valve head 6-111 and the second valve head 6-113 to abut the first valve head 6-111 against the first opening 6-115, and the second opening 6-116 is arranged between the first valve head 6-111 and the second valve head 6-113.

[0023] Among them, the valve body includes a valve sleeve 6-11 and a valve pressure cover 6-12. An installation cavity 6-117 is provided in the valve sleeve 6-11. The valve pressure cover 6-12 is fixed on the valve sleeve 6-11, thereby closing the installation cavity 6-117. The first opening 6-115 is arranged on the end face of the valve sleeve 6-11, and the second opening 6-116 is arranged on the circumferential side wall of the valve sleeve 6-11.

[0024] A guide hole 6-118 is provided in the second valve head 6-113. The first valve head 6-111 is slidably connected to the guide hole 6-118. A spring hole 6-119 is provided in the first valve head 6-111. The two ends of the support spring 6-112 abut against the guide hole 6-118 and the spring hole 6-119, respectively. A through hole 6-120 is provided on the side wall of the first valve head 6-111. The through hole 6-120 is connected to the spring hole 6-119 to facilitate the flow of oil that flows into the installation cavity 6-117 through the second opening 6-116 into the guide hole 6-118 and the spring hole 6-119. Under normal conditions, the support spring 6-112 is not fully compressed, so that the first valve head 6-111 and the second valve head 6-113 abut against the two sides of the installation cavity 6-117, respectively. When oil with higher oil pressure flows into the second opening 6-116, the oil enters the spring hole 6-119 and the guide hole 6-118 through the through hole 6-120, so that the first valve head 6-111 and the second valve head 6-113 quickly expand, so that the first valve head 6-111 and the second valve head 6-113 respectively abut against the two sides of the installation cavity 6-117, to prevent the high-pressure oil in the rodless cavity of the injection cylinder 4-1 from entering the first opening 6-115 when the boosting action is performed, thereby preventing the high-pressure oil in the rodless cavity of the injection cylinder 4-1 from generating pressure shock to the pipeline of the fast injection flow path 6.

[0025] The first valve head 6-111 is radially sealed with the installation cavity 6-117, and a sealing ring is provided on the inner wall of the installation cavity 6-117 to ensure that the first valve head 6-111 and the installation cavity 6-117 are sealed. At the same time, the first valve head 6-111 and the installation cavity 6-117 can slide axially; the first valve head 6-111 is radially sealed with the guide hole 6-118, and a sealing ring is provided in the guide hole 6-118 to achieve the sealing of the first valve head 6-111 and the guide hole 6-118. At the same time, the first valve head 6-111 and the guide hole 6-118 can slide radially and axially.

[0026] A sealing step is provided on the inner side of the first opening 6-115, and a sealing bevel 6-114 is provided on the sealing step. The first valve head 6-111 is adapted to the sealing bevel 6-114, that is, a bevel is also provided on the circumferential side wall of the first valve head 6-111. When the bevel of the first valve head 6-111 abuts against the sealing bevel 6-114, the first opening 6-115 is in a closed state.

[0027] A pilot oil inlet hole 6-122 and a pilot oil drain hole 6-123 are provided on the valve gland 6-12. The pilot oil inlet hole 6-122 and the pilot oil drain hole 6-123 are arranged toward the end surface of the mounting cavity 6-117. Under normal conditions, due to the presence of the support spring 6-112, the second valve head 6-113 abuts against the pilot oil inlet hole 6-122 and the pilot oil drain hole 6-123. An oil guide groove 6-121 is provided at the bottom of the pilot oil inlet hole 6-122 and the pilot oil drain hole 6-123. As a preferred embodiment, the shape of the oil guide groove 6-121 can be a cross shape or an annular shape. In this embodiment, the shape of the oil guide groove 6-121 is annular. Preferably, the area of ​​the oil guide groove 6-121 is larger than the cross-sectional area of ​​the first opening 6-115, thereby increasing the effective area of ​​the oil guide groove 6-121 on the second valve head 6-113, preventing the second valve head 6-113 from being difficult to open after abutting against the end face of the valve cover 6-12.

[0028] A fast pressurized injection oil circuit includes an injection-boosting oil cylinder 4, a slow injection flow path 2, a fast injection flow path 6, a pressurizing flow path 9, and a hydraulic one-way shut-off quick cartridge valve 6-1. The slow injection flow path 2 and the pressurizing flow path 9 are connected to the injection-boosting oil cylinder 4, and the fast injection flow path 6 is connected to the injection-boosting oil cylinder 4 through the hydraulic one-way shut-off quick cartridge valve 6-1.

[0029] The injection booster cylinder 4 includes an injection cylinder 4-1 and a booster cylinder 4-2, which are connected to each other. The booster cylinder 4-2 is arranged at the rear end of the injection cylinder 4-1. The injection cylinder 4-1 is supplemented by the booster cylinder 4-2. Piston rods are provided in both the injection cylinder 4-1 and the booster cylinder 4-2. The piston rod in the injection cylinder 4-1 divides the injection cylinder 4-1 into a rod chamber and a rodless chamber. Similarly, the piston rod in the booster cylinder 4-2 divides the booster cylinder 4-2 into a rod chamber and a rodless chamber. The second opening 6-116 is connected to the rodless chamber of the injection cylinder 4-1.

[0030] Among them, the slow injection flow path 2 includes a slow injection oil inlet main valve 2-1, a slow injection oil inlet shuttle valve 2-2, a slow injection oil inlet pilot valve 2-3, a slow injection check valve 3 and a system oil source 1. The system oil source 1 is connected to the slow injection oil inlet shuttle valve 2-2, the slow injection oil inlet shuttle valve 2-2 is connected to the injection slow oil inlet check valve 3, the injection slow oil inlet check valve 3 is connected to the rodless cavity of the injection cylinder 4-1, the slow injection oil inlet shuttle valve 2-2, the slow injection oil inlet pilot valve 2-3 are connected to the slow injection oil inlet main valve 2-1, and are used to control the operation of the slow injection oil inlet main valve 2-1.

[0031] A quick oil discharge line 12 is connected to the rod chamber side of the injection cylinder 4-1, and a quick oil discharge main valve 12-1, a quick oil discharge pilot valve 12-2 and an oil tank 15 are connected to the quick oil discharge line 12. The oil tank 15 is connected to the rod chamber of the injection cylinder 4-1 through the quick oil discharge main valve 12-1, and the quick oil discharge pilot valve 12-2 is connected to the quick oil discharge main valve 12-1.

[0032] When performing slow injection, the slow injection oil inlet pilot valve 2-3 is energized, the slow injection oil inlet main valve 2-1 is opened, and the system oil enters the rodless chamber of the injection cylinder 4-1 through the slow injection oil inlet main valve 2-1 and the slow injection check valve 3; the fast oil discharge pilot valve 12-2 is energized, the fast oil discharge main valve 12-1 is opened, and the oil in the rod chamber of the injection cylinder 4-1 is discharged into the oil tank 15 through the fast oil discharge main valve 12-1, and the piston rod of the injection cylinder 4-1 extends. The injection fast oil inlet pilot valve 6-2 is energized, and the oil enters the oil guide groove 6-121 at the upper end of the valve sleeve 6-11 through the injection fast oil inlet pilot valve 6-2 and the pilot oil inlet hole 6-122 of the valve cover 6-12. Under the action of the oil pressure of the fast accumulator 5, the first valve head 6-111 is pushed downward together until the lower side of the first valve head 6-111 is pressed tightly against the sealing inclined surface of the valve sleeve 6-11, and the second valve head 6-113 is pressed tightly against the upper end face of the valve core 6-111. At this time, the cartridge valve 6-11 is closed, and the first opening 6-115 and the second opening 6-116 are blocked.

[0033] The fast injection flow path 6 includes a fast accumulator 5 and a pilot valve assembly. The fast accumulator 5 is connected to the first opening 6-115, the second opening 6-116 is connected to the rodless chamber of the injection cylinder 4-1, and the pilot valve assembly is connected to the installation chamber 6-117; the pilot valve assembly includes an injection fast oil discharge pilot valve 6-3 and an injection fast oil feed pilot valve 6-2. The injection fast oil discharge pilot valve 6-3 and the injection fast oil feed pilot valve 6-2 are respectively connected to the installation chamber 6-117 on one side of the second valve head 6-113.

[0034] During rapid injection, the slow injection oil inlet pilot valve 2-3 loses power, and the slow injection oil inlet main valve 2-1 closes. The rapid injection oil inlet pilot valve 6-2 loses power, and the rapid injection oil discharge pilot valve 6-3 becomes energized. The pilot oil at the upper end of the valve sleeve 6-11 returns to the oil tank 15 through the pilot oil discharge hole 6-123 of the cartridge valve gland 6-12 and the rapid injection oil discharge pilot valve 6-3. Driven by the oil pressure from the first opening 6-115 of the cartridge valve 6-11, the first valve head 6-111, the support spring 6-112, and the second valve head 6-113 move upward until the upper end surface of the first valve head 6-111 is pressed against the second valve head 6-113, and the upper end surface of the second valve head 6-113 is pressed against the cartridge valve gland body 6-121. At this time, the hydraulic one-way stop quick cartridge valve 6-1 opens, and the oil from the first opening 6-115 flows to the second opening 6-116, and then enters the rodless chamber of the injection cylinder 4-1, pushing the piston rod of the injection cylinder 4-1. The quick oil discharge pilot valve 12-2 is energized, opening the quick oil discharge main valve 12-1. The oil in the rod chamber of the injection cylinder 4-1 is discharged into the oil tank 15 through the quick oil discharge main valve 12-1, and the piston rod of the injection cylinder 4-1 is extended.

[0035] The boost flow path 9 includes a boost accumulator 8, a boost inlet main valve 9-1, and a boost inlet pilot valve 9-2. The boost accumulator 8 is connected to the rodless chamber of the boost cylinder 4-2 via the boost inlet main valve 9-1, and the boost inlet pilot valve 9-2 is connected to the boost inlet main valve 9-1. A boost cylinder return valve 14 is also connected to the rodless chamber of the boost cylinder 4-2. This return valve 14 includes a boost cylinder return main valve 14-1 and a boost cylinder return pilot valve 14-2. The rodless chamber of the boost cylinder 4-2 is connected to the fuel tank 15 via the boost cylinder return main valve 14-1, and the boost cylinder return pilot valve 14-2 is connected to the boost cylinder return main valve 14-1.

[0036] During the boosting operation, boost inlet pilot valve 9-2 is energized, opening boost inlet main valve 9-1. The oil in boost accumulator 8 enters the rodless chamber of boost cylinder 4-2 through boost inlet main valve 9-1. The gas in the rodless chamber of boost cylinder 4-2 is discharged directly into tank 15. The quick-drain pilot valve 12-2 is energized, opening quick-drain main valve 12-1. The oil in the rod chamber of injection cylinder 4-1 is discharged into tank 15 through quick-drain main valve 12-1. The piston of boost cylinder 4-2 extends, simultaneously pushing the piston rod of injection cylinder 4-1 to extend as well. Since the piston area of ​​boost cylinder 4-2 is larger than the area of ​​the extending rod, the pressure in the rodless chamber of injection cylinder 4-1 rises and is much higher than the pressure in injection accumulator 5. In order to achieve a rapid increase in the rodless chamber pressure of the injection cylinder 4-1 and protect the injection fast oil inlet pilot valve 6-2 and the injection fast oil discharge pilot valve 6-3, the hydraulic one-way stop quick plug-in valve 6-1 needs to have a quick closing function. When the pressure in the rodless chamber of the injection cylinder 4-1 increases, the high-pressure oil enters the interior of the valve core 6-111 from the second opening 6-116 through the through holes 6-120 around the first valve head 6-111, and the pressure oil pushes the second valve head 6-113 upward to keep it pressed against the valve cover 6-12. Under the action of the pressure oil inside and above the first valve head 6-111 and the supporting spring 6-112, the first valve head 6-111 moves downward until it is pressed against the sealing slope 6-114. At this time, the hydraulic one-way shut-off quick-disconnect valve 6-1 is closed, the first opening 6-115 and the second opening 6-116 are blocked, and the oil in the second opening 6-116 cannot flow into the first opening 6-115, thereby realizing the rapid closing of the hydraulic one-way shut-off quick-disconnect valve 6-1.

[0037] The rod chamber of the injection cylinder 4-1 is connected to a return hammer flow path 10 and a quick oil drain valve 12. The return hammer flow path 10 is equipped with a return hammer oil inlet main valve 10-1 and a return hammer oil inlet pilot valve 10-2. The return hammer oil inlet main valve 10-1 is connected to the rod chamber of the injection cylinder 4-1 via a return hammer oil inlet check valve 11. The return hammer oil inlet main valve 10-1 is also connected to the quick system oil source 1. The return hammer oil inlet pilot valve 10-2 is connected to the return hammer oil inlet main valve 10-1 to control the operation of the return hammer oil inlet main valve 10-1. The quick oil drain valve 12 includes a quick oil drain main valve 12-1 and a quick oil drain pilot valve 12-2. The rod chamber of the injection cylinder 4-1 is connected to the oil tank 15 via the quick oil drain main valve 12-1. The quick oil drain pilot valve 12-2 is connected to the quick oil drain main valve 12-1 to control the quick oil drain main valve 12-1.

[0038] A return hammer oil return valve 13 is connected to the rodless chamber of the injection cylinder 4-1. The return hammer oil return valve 13 includes a return hammer oil return main valve 13-1 and a return hammer oil return pilot valve 13-2. The rodless chamber of the injection cylinder 4-1 is connected to the oil tank 15 through the return hammer oil return main valve 13-1. The return hammer oil return pilot valve 13-2 is connected to the return hammer oil return main valve 13-1 to control the operation of the return hammer oil return main valve 13-1.

[0039] The piston rods of the injection cylinder 4-1 and the boost cylinder 4-2 retract. When the quick oil discharge pilot valve 12-2 loses power, the quick oil discharge main valve 12-1 closes; the return hammer oil inlet pilot valve 10-2 is energized, the return hammer oil inlet main valve 10-1 opens, and the oil from the system oil source 1 enters the rod chamber of the injection cylinder 4-1 through the return hammer oil inlet main valve 10-1 and the return hammer oil inlet check valve 11; the piston rod of the injection cylinder 4-1 retracts and pushes the piston rod of the boost cylinder 4-2 to retract; The return hammer oil return pilot valve 13-2 loses power, the return hammer oil return main valve 13-1 opens, and the oil in the rodless chamber of the injection cylinder 4-1 returns to the oil tank 15 through the return hammer oil return main valve 13-1; the booster cylinder oil return pilot valve 14-2 loses power, the booster cylinder oil return main valve 14-1 opens, and the oil in the rodless chamber of the booster cylinder 4-2 returns to the oil tank 15 through the booster cylinder oil return main valve 14-1, and the piston rods of the injection cylinder 4-1 and the booster cylinder 4-2 both retract.

[0040] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is to be embodied in the widest possible manner consistent with the principles and novel features disclosed herein.

[0041] Although this article uses more terms corresponding to the figure marks in the figures, it does not exclude the possibility of using other terms; these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A hydraulic one-way shut-off quick-install valve, characterized in that: include: The valve body is provided with an installation cavity (6-117), a pilot oil inlet hole (6-122) and a pilot oil outlet hole (6-123); a first opening (6-115) and a second opening (6-116) are provided on a side wall of the installation cavity (6-117); A valve core assembly is installed in the installation cavity (6-117), and the valve core assembly includes a first valve head (6-111) and a second valve head (6-113) that are slidably connected, wherein a guide hole (6-118) is provided in the second valve head (6-113), the first valve head (6-111) and the guide hole (6-118) are radially sealed, and the first valve head (6-111) and the guide hole (6-118) are axially slidably connected; and a support spring (6-112) is provided between the first valve head (6-111) and the second valve head (6-113); A through hole (6-120) is provided on the first valve head (6-111) and / or the second valve head (6-113), and oil is directed between the first valve head (6-111) and the second valve head (6-113) through the through hole (6-120), so that the first valve head (6-111) and the second valve head (6-113) respectively abut against the first opening (6-115) and the inner wall of the installation cavity (6-117), and the second opening (6-116) is located between the first valve head (6-111) and the second valve head (6-113); The second valve head (6-113) abuts against the pilot oil inlet hole (6-122) and the pilot oil discharge hole (6-123); an oil guide groove (6-121) is provided at the bottom of the pilot oil inlet hole (6-122) and the pilot oil discharge hole (6-123), and the area of ​​the oil guide groove (6-121) is larger than the cross-sectional area of ​​the first opening (6-115).

2. A hydraulic one-way shut-off quick-install valve according to claim 1, characterized in that: A spring hole (6-119) is provided in the first valve head (6-111), and two ends of the support spring (6-112) are respectively in contact with the guide hole (6-118) and the spring hole (6-119).

3. The hydraulic one-way shut-off quick-install valve according to claim 1, characterized in that: The first valve head (6-111) and the installation cavity (6-117) are radially sealed, and the first valve head (6-111) and the installation cavity (6-117) are axially slidably connected.

4. The hydraulic one-way shut-off quick-install valve according to claim 1, characterized in that: A sealing step is provided on the inner side of the first opening (6-115), a sealing inclined surface (6-114) is provided on the sealing step, and the first valve head (6-111) is adapted to the sealing inclined surface (6-114).

5. A rapid pressurization injection oil circuit, characterized in that: It comprises an injection booster oil cylinder (4), a slow injection fluid path (2), a fast injection fluid path (6), a booster flow path (9), and a hydraulic one-way shut-off quick-insertion valve (6-1) as described in any one of claims 1 to 4. The slow injection fluid path (2) and the booster flow path (9) are connected to the injection booster oil cylinder (4), and the fast injection fluid path (6) is connected to the injection booster oil cylinder (4) via the hydraulic one-way shut-off quick-insertion valve (6-1).

6. The rapid pressurization injection oil circuit according to claim 5, characterized in that: The rapid injection flow path (6) comprises a rapid accumulator (5) and a pilot valve assembly, wherein the rapid accumulator (5) is connected to a first opening (6-115), the second opening (6-116) is connected to an injection boosting oil cylinder (4), and the pilot valve assembly is connected to a mounting cavity (6-117).

7. The rapid pressurization injection oil circuit according to claim 6, characterized in that: The pilot valve assembly comprises a pressure-injection fast oil discharge pilot valve (6-3) and a pressure-injection fast oil feed pilot valve (6-2), and the pressure-injection fast oil discharge pilot valve (6-3) and the pressure-injection fast oil feed pilot valve (6-2) are respectively connected to the mounting cavity (6-117) on one side of the second valve head (6-113).

8. The rapid pressurization injection oil circuit according to claim 7, characterized in that: The injection and boosting oil cylinder (4) comprises an injection oil cylinder (4-1) and a boosting oil cylinder (4-2), each of which is provided with a piston rod, and the second opening (6-116) is connected to the rodless cavity of the injection oil cylinder (4-1).

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