A manual liquid filling gun

Abstract

The present invention discloses a manual liquid filling gun, which includes an outer barrel head; a front seal seat installed inside the outer barrel head, with an inner barrel installed at the tail in a threaded connection manner; a valve core assembly installed inside the front seal seat; an inner barrel connected to the tail of the front seal seat; a connecting rod connected to the tail of the inner barrel in a pin connection manner through a shaft pin; an outer barrel connecting plate fixedly installed on the outer barrel head through a screw, a force adding bar assembly and a locking assembly for detachably and tightly connecting an external pipeline to the front seal seat; the present invention has reasonable design, simple structure, practical and convenient use, and is used for the filling of LNG. Through reasonable design of each component, the locking of the outer barrel and the filling of LNG can be skillfully completed. At the same time, a shaft pin is reasonably adopted to connect the inner barrel and the connecting rod in a pin connection manner, making the installation and disassembly more convenient.

Description

Technical Field

[0001] The present invention relates to the field of LNG filling equipment, and more specifically, to a manual liquid filling gun. Background Art

[0002] LNG (Liquefied Natural Gas) is the English abbreviation for liquefied natural gas. Natural gas is a combustible gas naturally extracted from gas fields and mainly consists of methane. LNG is obtained by cooling gaseous natural gas at atmospheric pressure to -162 °C to condense it into a liquid. After liquefaction, natural gas can greatly save storage and transportation space and has characteristics such as high calorific value and excellent performance.

[0003] LNG is a clean and efficient energy source. Since importing LNG helps energy-consuming countries diversify their energy supplies and ensure energy security, while exporting LNG helps natural gas-producing countries effectively develop natural gas resources, increase foreign exchange earnings, and promote national economic development, LNG trade is becoming a new hotspot in the global energy market.

[0004] As a clean energy source, natural gas is increasingly favored. Many countries have listed LNG as the preferred fuel, and the proportion of natural gas in energy supply has increased rapidly. Liquefied natural gas is growing at a high speed of about 12% per year and has become one of the fastest-growing energy industries globally.

[0005] During the LNG filling process, many use manual liquid filling guns. However, the structure of traditional manual liquid filling guns is too conventional, with high costs and difficult disassembly. In particular, the connection between the inner barrel and the power component at the rear is often fixed by welding, which is not convenient for maintenance and disassembly. Summary of the Invention

[0006] Therefore, to address the above deficiencies, the present invention provides a liquid filling gun for LNG filling that is reasonably designed, simple in structure, practical and convenient. Through reasonable design of each component, it can skillfully complete the locking of the outer barrel and the filling of LNG. At the same time, a shaft pin and a plug connection method are reasonably adopted to connect the inner barrel and the connecting rod, making installation and disassembly more convenient.

[0007] The present invention is implemented as follows. A manual liquid filling gun is constructed, including

[0008] An outer barrel head;

[0009] A front seal seat, installed inside the outer barrel head, and an inner barrel is installed at the tail in a threaded connection manner.

[0010] A valve core assembly, installed inside the front seal seat and capable of axial movement;

[0011] The inner barrel is connected to the tail of the front seal seat. The inner channel of the inner barrel and the inner channel of the front seal seat form a liquid filling gun channel, and the opening and closing of the liquid filling gun channel is controlled by a valve core assembly. An inner barrel spring is installed inside the inner barrel at the tail of the valve core assembly to provide thrust for the valve core assembly;

[0012] The connecting rod is connected to the tail of the inner barrel by a pin connection through a shaft pin;

[0013] The outer barrel connecting plate is fixedly installed on the outer barrel head through a screw. The connecting rod passes through the outer barrel connecting plate, and a main spring wound around the connecting rod is arranged between the outer barrel connecting plate and the tail end of the connecting rod. A thrust spring is installed on the screw through a shoulder. The other end of the thrust spring is connected to a pressure support sleeve assembly installed on the periphery of the inner barrel;

[0014] The force - adding bar assembly includes two symmetrically arranged force - adding bars. The front end of the force - adding bar is installed on the outer barrel connecting plate in a hinged manner, and the middle part of the force - adding bar is connected to the tail of the connecting rod through an oval plate. The oval plate is connected to the oval plate and the connecting rod in a hinged connection manner; and

[0015] The locking assembly fastens and connects the external pipeline and the front seal seat in a detachable manner.

[0016] Preferably, the tail of the inner barrel is a connecting part. An axial connecting hole is opened in the connecting part. At the same time, two radial pin holes penetrating the edge of the connecting hole and used for installing shaft pins are arranged in the connecting part.

[0017] Preferably, the front end of the connecting rod is inserted into the connecting hole and is provided with an annular groove matching the shaft pin.

[0018] Preferably, the tail of the connecting rod is an I - shaped connecting part, and pin holes are opened on both sides of the I - shaped connecting part.

[0019] Preferably, the inner barrel is provided with an extended material port, and a connecting joint is installed at the outer end of the material port through a connecting nut.

[0020] Preferably, the locking assembly includes several claw - shaped parts. The middle part of the claw - shaped part is installed on the outer barrel head through a pin shaft, and the tail of the claw - shaped part is connected to a pressure support sleeve assembly sleeved on the periphery of the inner barrel in a hinged manner through a connecting piece.

[0021] Preferably, the outer barrel head, the pressure support sleeve, the force - adding bar, the oval plate and the claw - shaped part are all precision - cast from 304 material to form blanks, and then the blanks are finish - machined.

[0022] The present invention has the following advantages:

[0023] The present invention is reasonably designed, with a simple structure, practical and convenient. The liquid filling gun for LNG can cleverly complete the locking of the outer barrel and the filling of LNG through reasonable design of each component. At the same time, a shaft pin is reasonably adopted to connect the inner barrel and the connecting rod in a plug connection manner, making the installation and disassembly more convenient;

[0024] The specific plug connection method is that the tail of the inner barrel is a connecting part, an axial connecting hole is opened in this connecting part, and at the same time, two radial pin holes for installing shaft pins are arranged on the connecting part and penetrate through the edge of the connecting hole; the front end of the connecting rod is inserted into the connecting hole, and an annular groove matching the shaft pin is opened; the tail of the connecting rod is an I-shaped connecting part, and pin holes are opened on both sides of this I-shaped connecting part; this connection method is more convenient, stable and reliable. Since the inner barrel only needs to move axially, the connection strength in this way fully meets the requirements, and it is also more convenient for maintenance during the maintenance of the entire liquid filling gun.

[0025] At the same time, the outer barrel head, pressure support sleeve, force increasing bar, waist-shaped plate and claw are all precision cast from 304 material to form blanks, and the blanks are then machined to form; the blanks are precision cast from 304 material, which is suitable for mass production. The subsequent machining allowance is reduced, and the overall structure is simple; the product cost can be reduced as a whole; currently, the market barrels are generally processed from aluminum alloy. Compared with the mechanical properties of 304 material, the tensile strength and surface wear resistance are better; the service life is longer, and less maintenance is required in the later stage. And after the blank is precision cast, it is beneficial to the surface shaping, reduces the product weight, and beautifies the product appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the top view of the present invention;

[0027] Figure 2 is the front view of the present invention;

[0028] Figure 3 is the assembly drawing of the present invention in the open claw state;

[0029] Figure 4 is the front view of the present invention;

[0030] Figure 5 is the three-dimensional view of the connection state of the inner barrel and the connecting rod of the present invention;

[0031] Figure 6 is the top view of the connection state of the inner barrel and the connecting rod of the present invention;

[0032] Figure 7 is the front view of the connection state of the inner barrel and the connecting rod of the present invention;

[0033] Figure 8 is Figure 7Cross-sectional view taken along A-A;

[0034] Figure 9 is a schematic diagram showing the cooperation between the connecting rod and the shaft pin of the present invention;

[0035] Figure 10 is a perspective view of the connecting rod of the present invention;

[0036] Figure 11 is a perspective view of the inner barrel of the present invention;

[0037] Figure 12 is a perspective view of the outer barrel head of the present invention;

[0038] Figure 13 is a perspective view of the jaw of the present invention;

[0039] Figure 14 is a perspective view of the pressure support sleeve of the present invention;

[0040] Figure 15 is a perspective view of the oval plate of the present invention;

[0041] Figure 16 is a perspective view of the force enhancing bar of the present invention. Detailed implementation manner

[0042] The following will combine the attached Figures 1 - 16 The present invention will be described in detail. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0043] The present invention provides a manual liquid filling gun through improvement, including

[0044] Outer barrel head 1;

[0045] Front seal seat 7, installed inside the outer barrel head, and an inner barrel 13 is installed at the tail in a threaded connection manner;

[0046] Valve core assembly 5, installed inside the front seal seat 7 and capable of axial movement;

[0047] Inner barrel 13, connected to the tail of the front seal seat. The internal channel of the inner barrel and the internal channel of the front seal seat form a liquid filling gun channel, and the opening and closing of the liquid filling gun channel are controlled by the valve core assembly. An inner barrel spring 10 located at the tail of the valve core assembly and providing thrust for the valve core assembly is installed inside the inner barrel;

[0048] Connecting rod 14, connected to the tail of the inner barrel 13 in a pin connection manner through a shaft pin 20;

[0049] The outer barrel connecting plate 6 is fixedly installed on the outer barrel head 1 through the screw 4. The connecting rod passes through the outer barrel connecting plate 6, and a main spring 12 wound around the connecting rod is arranged between the outer barrel connecting plate and the tail end of the connecting rod. A thrust spring is installed on the screw through a shoulder, and the other end of the thrust spring is connected to the pressure support sleeve assembly 11 installed around the inner barrel 13; the pressure support sleeve assembly 11 includes a pressure support sleeve 11.2 and several tiles 11.1 welded to the front end.

[0050] The force - adding bar assembly includes two symmetrically arranged force - adding bars 8. The front end of the force - adding bar is hingedly installed on the outer barrel connecting plate 6, and the middle part of the force - adding bar 8 is connected to the tail of the connecting rod 14 through an oval plate 8.1. The oval plate is hingedly connected to the oval plate and the connecting rod; and

[0051] The locking assembly fastens and connects the external pipeline and the front seal seat in a detachable manner.

[0052] In this embodiment, the tail of the inner barrel 13 is a connecting part 13.1. An axial connecting hole 13.2 is opened in the connecting part, and at the same time, two radial pin holes 13.3 penetrating through the edge of the connecting hole and used for installing shaft pins are arranged in the connecting part.

[0053] In this embodiment, the front end of the connecting rod 14 is inserted into the connecting hole 13.2, and an annular groove 14.2 matching the shaft pin 20 is opened.

[0054] In this embodiment, the tail of the connecting rod 14 is an I - shaped connecting part 14.1, and pin holes are opened on both sides of the I - shaped connecting part.

[0055] In this embodiment, the inner barrel 13 is provided with an extended material port 13.1, and a connecting joint 17 is installed at the outer end of the material port through a connecting nut 16.

[0056] In this embodiment, the locking assembly includes several claws 2. The middle part of the claw is installed on the outer barrel head 1 through a shaft pin, and the tail of the claw is hingedly connected to the pressure support sleeve assembly 11 sleeved around the inner barrel 13 through a connecting piece 3.

[0057] In this embodiment, the outer barrel head 1, the pressure support sleeve 11, the force - adding bar 8, the oval plate 8.1, and the claw 2 are all precision - cast from 304 material to form blanks, and then the blanks are finish - machined.

[0058] The present invention is a filling gun for LNG. When in use, the staff first docks the gun seat of the external pipeline to the outer barrel head, then manually moves the force-applying bar 8. The force-applying bar 8 drives the connecting rod 14 to move through the waist-shaped plate 8.1, and then drives the inner barrel 13 to move. The pressure support sleeve assembly moves forward under the push of the screw spring force, drives the connecting piece to move, and the connecting plate 3 further pushes the claw to move, so as to lock the external gun seat through the claw 2; at the same time, the inner barrel 13 drives the front seal seat 7 to move. When the front seal seat 7 moves relative to the outer barrel head, the valve core assembly is pushed and moves relative to the valve core assembly 5, so that the liquid filling gun channel is communicated with the external outer barrel, and the filling of LNG is realized.

[0059] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A manual liquid adding gun, characterized in that: including an outer barrel head (1); a front seal seat (7), installed inside the outer barrel head, with an inner barrel (13) installed at the tail in a threaded connection manner; a valve core assembly (5), installed inside the front seal seat (7) and capable of axial movement; an inner barrel (13), connected to the tail of the front seal seat. The internal channel of the inner barrel and the internal channel of the front seal seat form a liquid filling gun channel, and the opening and closing of this liquid filling gun channel are controlled by the valve core assembly. An inner barrel spring (10) located at the tail of the valve core assembly and providing thrust for the valve core assembly is installed inside the inner barrel; a connecting rod (14), connected to the tail of the inner barrel (13) in a pin connection manner through a shaft pin (20); an outer barrel connecting plate (6), fixedly installed on the outer barrel head (1) through a screw (4). The connecting rod passes through the outer barrel connecting plate (6), and a main spring (12) wound around the connecting rod is provided between the outer barrel connecting plate and the tail end of the connecting rod. A thrust spring is installed on the screw through a shoulder, and the other end of the thrust spring is connected to a pressure support sleeve assembly (11) installed on the periphery of the inner barrel (13); a force - adding bar assembly, including two symmetrically arranged force - adding bars (8). The front end of the force - adding bar is installed on the outer barrel connecting plate (6) in a hinged manner, and the middle part of the force - adding bar (8) is connected to the tail of the connecting rod (14) through an oval plate (8.1). The oval plate is connected to the oval plate and the connecting rod in a hinged connection manner; and a locking assembly, detachably fastening and connecting an external pipeline to the front seal seat; the tail of the inner barrel (13) is a connecting part (13.1), an axial connecting hole (13.2) is opened in the connecting part, and at the same time, two radial pin holes (13.3) penetrating through the edge of the connecting hole and used for installing shaft pins are provided in the connecting part; the front end of the connecting rod (14) is inserted into the connecting hole (13.2), and an annular groove (14.2) matching the shaft pin (20) is opened; the tail of the connecting rod (14) is an I - shaped connecting part (14.1), and pin holes are opened on both sides of the I - shaped connecting part; the inner barrel (13) is provided with an extended material port, and a connecting joint (17) is installed at the outer end of the material port through a connecting nut (16); the locking assembly includes several claws (2). The middle part of the claw is installed on the outer barrel head (1) through a shaft pin, and the tail of the claw is connected to a pressure support sleeve assembly (11) sleeved on the periphery of the inner barrel (13) in a hinged manner through a connecting piece (3).

2. The manual liquid adding gun according to claim 1, characterized in that: The outer barrel head (1), the force - adding bar (8), the oval plate (8.1), and the claw (2) are all precision - cast from 304 material to form blanks, and then the blanks are finish - machined.

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