A manual injection tool

Abstract

This utility model discloses a manual fluid injection tool, belonging to the field of hydraulic system maintenance technology. It includes a fluid storage cylinder, a mounting base, a piston drive mechanism, and a fluid return valve. The bottom of the fluid storage cylinder is equipped with an inlet check valve, an injection check valve, and a fluid return valve. The inlet and injection check valves both adopt a bidirectional truncated cone structure and have a built-in ball of a specific diameter to achieve precise control without backflow. This device can solve the problem of insufficient adaptability of traditional tools and is suitable for the maintenance of hydraulic systems of various types of equipment such as recoil machines, retraction machines, and balancing machines.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment maintenance technology, specifically a manual fluid injection tool suitable for the hydraulic system of mechanical equipment, used to perform fluid injection, replenishment and depletion operations. Background Technology

[0002] In the routine maintenance of hydraulic systems for machines such as recoil machines, accelerators, and balancing machines, the accuracy and efficiency of fluid injection and removal operations directly affect the equipment's condition. Currently, commonly used traditional fluid injection tools have the following technical shortcomings: Insufficient sealing performance: Existing devices mostly use a single rubber gasket for sealing, which is prone to hydraulic oil leakage when the high pressure injection is >0.5MPa, resulting in an injection volume error of more than ±10%, which is difficult to meet the accuracy requirements of GJB 2878-97 "Maintenance Specification for Artillery Hydraulic Systems".

[0003] Lack of fluid draining function: When the fluid volume exceeds the limit, the operator needs to disassemble the pipeline for manual draining, which not only takes more than 30 minutes, but also poses a risk of oil contamination.

[0004] Poor installation compatibility: The hydraulic interfaces of different artillery models have different specifications, and existing tools need to frequently replace adapters, reducing work efficiency by more than 40%. Summary of the Invention

[0005] The purpose of this invention is to provide a petal-shaped steel radiator with a simple manufacturing process, a large heat dissipation area, and low heating cost.

[0006] The objective of this utility model is achieved through the following technical solution: A manual injection tool, comprising: The liquid storage cylinder 2 is connected to the liquid inlet pipe at its bottom via the liquid inlet check valve 3, to the high-pressure hose via the liquid injection check valve 4, and to the liquid discharge control via the liquid discharge valve 5. Mounting base 6, fixedly connected to liquid storage cylinder 2; The piston rod 1 has a piston 8 fixed at its bottom end against the inner wall of the liquid storage cylinder, and the handle 7 is hinged to the middle of its top end. The connecting rod 9 is fixed to the mounting base 6 and hinged to one end of the handle 7 to form a lever drive structure. The liquid return valve 5 is installed on the liquid storage cylinder 2.

[0007] As a preferred technical solution of this utility model, the liquid inlet check valve 3 includes a frustum-shaped hollow structure, with a liquid inlet 11 on the top surface and a baffle plate 10 on the bottom surface. A ball 12 with a diameter between the top and bottom surfaces is placed inside the hollow structure.

[0008] As a preferred technical solution of this utility model, the liquid injection one-way valve 4 includes a frustum-shaped hollow structure, with a liquid inlet 11 on the bottom surface and a baffle plate 10 on the top surface. A ball 12 with a diameter between the top and bottom surfaces is placed inside the hollow structure.

[0009] As a preferred technical solution of this utility model, the mounting base 6 is fixed to the equipment to be injected with liquid by bolts 13.

[0010] As a preferred technical solution of this utility model, the liquid return valve 21 is provided with a sealing ring, and a sealing ring is used between the piston rod 1 and the piston cylinder.

[0011] The beneficial effects are as follows: This utility model integrates a liquid return valve and a two-way one-way valve, which work together to improve efficiency, enable rapid adaptation to multiple artillery models, and significantly reduce maintenance costs. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of the manual injection tool of this utility model; Figure 2 A cross-sectional view of the liquid storage cylinder and piston rod of the manual liquid injection tool of this utility model. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0014] like Figure 1 and 2 As shown, this utility model provides a liquid storage cylinder 2, the bottom of which is connected to the liquid inlet pipe through a liquid inlet check valve 3, connected to the high-pressure hose through a liquid injection check valve 4, and controlled to discharge liquid through a liquid discharge valve 5; and a mounting base 6, which is fixedly connected to the liquid storage cylinder 2. The piston rod 1 has a piston 8 fixed at its bottom end against the inner wall of the liquid storage cylinder, and the handle 7 is hinged to the middle of its top end; the connecting rod 9 is fixed to the mounting base 6 and hinged to one end of the handle 7 to form a lever drive structure; the liquid discharge valve 5 is set on the liquid storage cylinder 2.

[0015] In some embodiments, the liquid inlet check valve 3 includes a frustum-shaped hollow structure, with a liquid inlet 11 on the top surface and a baffle plate 10 on the bottom surface. A sphere 12 with a diameter between the top and bottom surfaces is placed inside the hollow structure.

[0016] In some embodiments, the liquid injection check valve 4 includes a frustum-shaped hollow structure with a liquid inlet 11 on its bottom surface and a baffle plate 10 on its top surface. A sphere 12 with a diameter between the top and bottom surfaces is placed inside the hollow structure.

[0017] In some embodiments, the mounting base 6 is fixed to the equipment to be injected with liquid by bolts 13.

[0018] In some embodiments, the discharge valve 21 is provided with a sealing ring, and a sealing ring is used between the piston rod 1 and the piston cylinder.

[0019] In this utility model, the body of the liquid storage cylinder 2 is made of 304 stainless steel, and the bottom is provided with three interfaces: the liquid inlet check valve 3 is connected to the liquid inlet pipe with M16×1.5 external thread; the liquid injection check valve 4 is connected to the high pressure hose with M14×1.5 internal thread; and the liquid discharge valve 5 adopts a ball valve structure with a DN15 diameter.

[0020] In this utility model, the mounting base 6 is made of aluminum alloy casting and is fixed to the fork plate 16 by 4 sets of M12 bolts 13. The fork plate is provided with a slot with a size of 50×10mm that matches the angle iron of the cannon. In this invention, the piston rod 1 has a diameter of 18mm and is hard chrome plated; the piston 8 uses an 18×2.4mm polyurethane sealing ring that is interference-fitted with the inner wall of the cylinder. The handle 7 and the connecting rod 9 form a lever ratio of 1:3, which is a force-saving structure.

[0021] In this utility model, the bidirectional conical check valves are as follows: the top diameter of the inlet check valve 3 is 8mm, the bottom diameter is 12mm, and a Φ10mm stainless steel ball is built in. The top diameter of the injection check valve 4 is 10mm, the bottom diameter is 15mm, and a Φ13mm stainless steel ball is built in.

[0022] In this utility model, two O-rings are provided between the valve body and the base 15: the first is a 38×3mm oil-resistant rubber ring; the second is a 14×2.4mm fluororubber ring; the drain valve 21 uses a 6×1.9mm nitrile rubber ring.

[0023] The working process of this utility model is as follows: During the liquid injection stage: When the handle 7 is pressed down, the piston 8 moves upward to generate negative pressure, and the liquid inlet check valve 3 opens to draw in liquid; when the handle is lifted up, the piston presses down to open the liquid injection check valve 4, and the liquid is injected into the equipment through the high-pressure hose.

[0024] Liquid discharge stage: Turn the valve stem of the liquid discharge valve to a 45° opening. The excess liquid will return to the storage container through the original pipeline under the action of gravity.

[0025] The liquid storage cylinder has a volume of 5L and a working pressure of 0.8MPa; the high-pressure hose is 1.5m long and has a burst pressure ≥15MPa; when the operating frequency is controlled at 60-70 times / minute, the injection rate reaches 2L / min; when a continuous oil film appears on the piston rod surface, replace the 18×2.4mm sealing ring; when the rotation torque of the return valve handle is <5N·m, replace the 6×1.9mm sealing ring.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral part; for those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0028] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A manual liquid injection tool, characterized by, include: The liquid storage cylinder (2) is connected to the liquid inlet pipe at its bottom through the liquid inlet check valve (3), and to the high pressure hose through the liquid injection check valve (4). The liquid is discharged through the liquid discharge valve (5). Mounting base (6) is used to fix and connect liquid storage cylinder (2); The piston rod (1) has a piston (8) fixed at the bottom end that abuts against the inner wall of the liquid storage cylinder, and the handle (7) is hinged at the top end. The connecting rod (9) is fixed to the mounting base (6) and hinged to one end of the handle (7) to form a lever drive structure; The liquid return valve (5) is installed on the liquid storage cylinder (2).

2. The manual injection tool according to claim 1, characterized in that: The liquid inlet check valve (3) includes a frustum-shaped hollow structure with a liquid inlet (11) on the top surface and a baffle plate (10) on the bottom surface. A sphere (12) with a diameter between the top and bottom surfaces is placed inside the hollow structure.

3. The manual injection tool according to claim 1, characterized in that: The liquid injection check valve (4) includes a frustum-shaped hollow structure with a liquid inlet (11) on the bottom surface and a baffle plate (10) on the top surface. A sphere (12) with a diameter between the top and bottom surfaces is placed inside the hollow structure.

4. The manual injection tool according to claim 1, characterized in that: The mounting base (6) is fixed to the equipment to be injected with liquid by bolts (13).

5. The manual injection tool according to claim 1, characterized in that: The discharge valve (5) is equipped with a sealing ring, and a sealing ring is used between the piston rod (1) and the piston cylinder.

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