Stop structure of stop valve

Abstract

The utility model relates to the technical field of cut-off valves, and discloses a cut-off structure of a cut-off valve, which comprises a valve casing and a fixed tubular column, the fixed tubular column is mounted at one end of the valve casing, a piston rod is mounted at the other end of the valve casing, and a first sliding groove is formed in the piston rod. According to the cut-off structure of the cut-off valve, the valve shell, the fixed pipe column, the piston rod, the first cut-off assembly, the mounting pipe, the connecting piece and the second cut-off assembly are arranged, the valve shell and the fixed pipe column are mounted in an oil gun, and a butt-joint groove of the piston rod is connected with the surface of the connecting piece; the first cut-off assembly and the second cut-off assembly are jacked into the first sliding groove and the second sliding groove correspondingly, when an oil way is normally communicated and cut off, the piston rod and the connecting piece are separated, the first cut-off assembly and the second cut-off assembly cut off the communication position of the first sliding groove and the second sliding groove correspondingly, and the first cut-off assembly and the second cut-off assembly conduct double cut-off. The sealing effect at the oil path cut-off position is improved, and oil leakage of the oil gun is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cut-off valves, in particular to a cut-off structure of a cut-off valve. Background Art

[0002] The fuel gun is the terminal of the fuel dispenser in the gas station, that is, the part that contacts the car's fuel tank. Self-sealing fuel guns and composite fuel guns are commonly used. The appearance of ordinary fuel guns is mainly composed of fuel gun body, hand guard, limit plate, switch handle, baffle, automatic control rod and other parts. The limit plate is fixed on the fuel gun hand guard, and there are three gears on the limit plate. When the switch handle is turned on, the baffle can be tilted 45 to 60 degrees. It is fixed on the limit plate and the opening of the fuel gun switch is fixed to control the amount of oil output from the fuel dispenser.

[0003] After the oil gun is started, open the oil gun switch handle, and the oil passes through the main valve hole, the venturi, the outlet valve and the gun barrel. When refueling, the oil quickly flows through the venturi, forming a low-pressure area in the sealed cavity between the venturi and the auxiliary valve seat, leading all the way to the air pipe to the air nozzle at the front end of the gun barrel, until the upper cavity of the self-control membrane. When the oil or foam in the container has not reached the air nozzle, the low-pressure area is released due to the large ventilation volume of the air nozzle; when the oil or foam submerges the air nozzle, the air nozzle is blocked, and negative pressure is formed in the upper cavity of the self-control membrane, causing the self-control membrane to move up and the steel ball to slide off. The self-sealing rod slides downward under the action of the main valve pressure, and at the same time drives the switch handle to disengage the support plate, so that the cut-off valve is closed and the oil gun is self-sealed. After the oil gun is self-sealed, the self-sealing rod and the self-control membrane are reset under the action of their respective spring forces, and the switch handle is reset accordingly, and the oil discharge function is restored.

[0004] At present, the common fueling gun cuts off the oil circuit, and the oil circuit in the fueling gun is blocked by a cutting rod. When the seal at the cutting rod position is damaged, the oil circuit cannot be completely cut off, and the fueling gun leaks oil. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a cut-off structure of a cut-off valve, which solves the problems mentioned in the above background.

[0006] The utility model provides the following technical solution: a cutting structure of a cutting valve, comprising: a valve housing and a fixed pipe column, the fixed pipe column is installed at one end of the valve housing, a piston rod is installed at the other end of the valve housing, a first slide groove is provided inside the piston rod, a first cutting assembly is installed on the inner wall of the first slide groove, a mounting pipe is installed at one end of the fixed pipe column, the mounting pipe is located inside the valve housing, a connecting piece is provided at one end of the mounting pipe, a second slide groove is provided inside the connecting piece, a second cutting assembly is installed on the inner wall of the second slide groove, mounting grooves and docking grooves are respectively provided at both ends of the piston rod, a docking rod is installed on the inner wall of the mounting groove, and the inner wall of the docking groove is movably connected to the surface of the connecting piece.

[0007] Preferably, the first cutting assembly includes a first supporting plate, a first cutting piece and a first spring, the first supporting plate is installed on the inner wall of the first slide groove, and the surface of the first supporting plate is provided with a through hole, the first cutting piece is connected to the inner wall of the first supporting plate, and the first cutting piece is slidably connected to the inner wall of the first slide groove, the first spring is sleeved on the surface of the first cutting piece, the surface of the first cutting piece is connected to the first sealing ring, and the surface of the first sealing ring is connected to the inner wall of the first slide groove.

[0008] Preferably, the second cutting assembly includes a second supporting plate, a second cutting piece and a second spring, the second supporting plate is mounted on the inner wall of the second slide groove, and a through hole is provided on the surface of the second supporting plate, the second cutting piece is connected to the inner wall of the second supporting plate, and the second cutting piece is slidably connected to the inner wall of the second slide groove, the second spring is sleeved on the surface of the second cutting piece, the surface of the second cutting piece is connected to the second sealing ring, the surface of the second sealing ring is connected to the inner wall of the second slide groove, one end of the first cutting piece and the second cutting piece both extend to the inside of the docking groove, and one end of the first cutting piece is movably connected to one end of the second cutting piece.

[0009] Preferably, a third sealing ring is connected to the inner wall of the docking groove, and the inner wall of the third sealing ring is connected to the surface of the connecting piece.

[0010] Preferably, the surface of the mounting tube is integrally formed and connected with a limiting portion, and the surface of the mounting tube is respectively installed with a first copper gasket and a second copper gasket, the first copper gasket and the second copper gasket are respectively located on both sides of the limiting portion, the surface of the first copper gasket is connected to the surface of the connecting piece, and the surface of the second copper gasket is connected to the surface of the fixed pipe column.

[0011] Preferably, a third copper gasket is sleeved on the surface of the docking rod, and the surface of the third copper gasket is connected to the end face of the piston rod.

[0012] Preferably, a groove is formed at one end of the valve housing, and a connecting spring is installed on the inner wall of the groove.

[0013] Preferably, a cap is installed on the surface of the fixed pipe column, and the surface of the cap is connected to the surface of the valve housing.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The cut-off structure of the cut-off valve is provided with a valve housing, a fixed pipe column, a piston rod, a first cut-off assembly, a mounting pipe, a connecting piece and a second cut-off assembly. The valve housing and the fixed pipe column are installed in the refueling gun, the docking groove of the piston rod is connected to the surface of the connecting piece, the first cut-off assembly and the second cut-off assembly are respectively pushed into the inside of the first slide groove and the second slide groove, and the oil circuit is normally connected. When cutting off, the piston rod and the connecting piece are separated, and the first cut-off assembly and the second cut-off assembly respectively cut off the connection between the first slide groove and the second slide groove. The first cut-off assembly and the second cut-off assembly are double-cut off, thereby improving the sealing effect of the oil circuit cut-off point and preventing oil leakage from the refueling gun.

[0016] 2. The cut-off structure of the cut-off valve is provided with a third sealing ring, a first copper gasket, a second copper gasket and a third copper gasket. When the docking groove of the piston rod is docked with the surface of the connecting piece, the surface of the connecting piece is connected to the inner wall of the third sealing ring, the first copper gasket seals between the fixed pipe column and the mounting pipe, the second copper gasket seals between the mounting pipe and the connecting piece, and the third copper gasket seals between the docking rod and the piston rod to prevent oil from penetrating outward. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the first cutting component in the utility model;

[0019] Figure 3 It is a structural schematic diagram of the second cutting component in the utility model.

[0020] In the figure: 1. valve housing; 2. fixed pipe column; 3. piston rod; 4. first slide groove; 5. first cutting assembly; 51. first support plate; 52. first cutting piece; 53. first spring; 54. first sealing ring; 6. mounting pipe; 7. connecting piece; 8. second slide groove; 9. second cutting assembly; 91. second support plate; 92. second cutting piece; 93. second spring; 94. second sealing ring; 10. mounting groove; 11. docking groove; 12. docking rod; 13. third sealing ring; 14. limiting part; 15. first copper gasket; 16. second copper gasket; 17. third copper gasket; 18. groove; 19. connecting spring; 20. cap. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-3 A cutting structure of a cutting valve comprises: a valve housing 1 and a fixed pipe column 2, the fixed pipe column 2 is installed at one end of the valve housing 1, a piston rod 3 is installed at the other end of the valve housing 1, a first slide groove 4 is opened inside the piston rod 3, a first cutting component 5 is installed on the inner wall of the first slide groove 4, a mounting pipe 6 is installed at one end of the fixed pipe column 2, the mounting pipe 6 is located inside the valve housing 1, a connecting piece 7 is arranged at one end of the mounting pipe 6, a second slide groove 8 is opened inside the connecting piece 7, a second cutting component 9 is installed on the inner wall of the second slide groove 8, a mounting groove 10 and a docking groove 11 are respectively opened at both ends of the piston rod 3, a docking rod 12 is installed on the inner wall of the mounting groove 10, and the inner wall of the docking groove 11 is movably connected to the surface of the connecting piece 7.

[0023] See also Figure 2 The first cutting assembly 5 includes a first supporting plate 51, a first cutting piece 52 and a first spring 53. The first supporting plate 51 is installed on the inner wall of the first slide groove 4, and a through hole is provided on the surface of the first supporting plate 51. The first cutting piece 52 is connected to the inner wall of the first supporting plate 51, and the first cutting piece 52 is slidably connected to the inner wall of the first slide groove 4. The first spring 53 is sleeved on the surface of the first cutting piece 52. The surface of the first cutting piece 52 is connected to the first sealing ring 54, and the surface of the first sealing ring 54 is connected to the inner wall of the first slide groove 4.

[0024] See also Figure 3 The second cutting assembly 9 includes a second supporting plate 91, a second cutting piece 92 and a second spring 93. The second supporting plate 91 is installed on the inner wall of the second slide groove 8, and a through hole is provided on the surface of the second supporting plate 91. The second cutting piece 92 is connected to the inner wall of the second supporting plate 91, and the second cutting piece 92 is slidably connected to the inner wall of the second slide groove 8. The second spring 93 is sleeved on the surface of the second cutting piece 92. The surface of the second cutting piece 92 is connected to the second sealing ring 94, and the surface of the second sealing ring 94 is connected to the inner wall of the second slide groove 8. One end of the first cutting piece 52 and the second cutting piece 92 both extend to the inside of the docking groove 11, and one end of the first cutting piece 52 is movably connected to one end of the second cutting piece 92.

[0025] The inner wall of the docking groove 11 is connected with a third sealing ring 13, the inner wall of the third sealing ring 13 is connected to the surface of the connecting piece 7, the surface of the mounting tube 6 is integrally formed and connected with a limiting portion 14, the surface of the mounting tube 6 is respectively installed with a first copper gasket 15 and a second copper gasket 16, the first copper gasket 15 and the second copper gasket 16 are respectively located on both sides of the limiting portion 14, the surface of the first copper gasket 15 is connected to the surface of the connecting piece 7, the surface of the second copper gasket 16 is connected to the surface of the fixed pipe column 2, the surface of the docking rod 12 is sleeved with a third copper gasket 17, the surface of the third copper gasket 17 is connected to the end face of the piston rod 3, when the docking groove 11 of the piston rod 3 is docked with the surface of the connecting piece 7, the surface of the connecting piece 7 is connected to the inner wall of the third sealing ring 13, the first copper gasket 15 seals between the fixed pipe column 2 and the mounting tube 6, the second copper gasket 16 seals between the mounting tube 6 and the connecting piece 7, and the third copper gasket 17 seals the gap between the docking rod 12 and the piston rod 3 to prevent oil from penetrating outward.

[0026] A groove 18 is provided at one end of the valve housing 1, and a connecting spring 19 is installed on the inner wall of the groove 18. The connecting spring 19 is connected to the inside of the refueling gun. A cap 20 is installed on the surface of the fixed pipe column 2. The surface of the cap 20 is connected to the surface of the valve housing 1. The cap 20 is installed on the surface of the fixed pipe column 2 and abuts against the end face of the valve housing 1. The position of the fixed pipe column 2 can be limited and fixed to prevent the fixed pipe column 2 from loosening during use, ensuring that the tightening force of the fixed pipe column 2 is uniform and firm.

[0027] The valve housing 1 and the fixed pipe column 2 are installed in the refueling gun, the docking groove 11 of the piston rod 3 is connected to the surface of the connecting member 7, the first cutting piece 52 contacts the second cutting piece 92 and pushes into the first slide groove 4 and the second slide groove 8 respectively, there is a through gap between the first cutting piece 52 and the first slide groove 4, there is a through gap between the second cutting piece 92 and the second slide groove 8, the oil circuit is normally connected, when cutting off, the piston rod 3 and the connecting member 7 are separated, the first cutting piece 52 is pushed by the first spring 53, so that the first sealing ring 54 on the surface of the first cutting piece 52 is connected to the inner wall of the first slide groove 4 for sealing, the second cutting piece 92 is pushed by the second spring 93, so that the second sealing ring 94 on the surface of the second cutting piece 92 is connected to the inner wall of the second slide groove 8 for sealing, the first cutting piece 52 cooperates with the first sealing ring 54 to cut off the connection of the first slide groove 4, the second cutting piece 92 cooperates with the second sealing ring 94 to cut off the connection of the second slide groove 8, the first cutting component 5 and the second cutting component 9 are double cut off, so as to improve the sealing effect of the oil circuit cut-off point and prevent oil leakage from the refueling gun.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cut-off structure of a cut-off valve, characterized in that: include: A valve housing (1) and a fixed pipe column (2), wherein the fixed pipe column (2) is mounted on one end of the valve housing (1), and a piston rod (3) is mounted on the other end of the valve housing (1), a first slide groove (4) is provided inside the piston rod (3), and a first cut-off assembly (5) is mounted on the inner wall of the first slide groove (4), a mounting pipe (6) is mounted on one end of the fixed pipe column (2), and the mounting pipe (6) is located inside the valve housing (1), and a connecting piece (7) is provided on one end of the mounting pipe (6), a second slide groove (8) is provided inside the connecting piece (7), and a second cut-off assembly (9) is mounted on the inner wall of the second slide groove (8), and mounting grooves (10) and docking grooves (11) are respectively provided on the two ends of the piston rod (3), a docking rod (12) is mounted on the inner wall of the mounting groove (10), and the inner wall of the docking groove (11) is movably connected to the surface of the connecting piece (7).

2. A cut-off structure of a cut-off valve according to claim 1, characterized in that: The first cutting assembly (5) comprises a first supporting plate (51), a first cutting piece (52) and a first spring (53); the first supporting plate (51) is mounted on the inner wall of the first sliding groove (4); a through hole is arranged on the surface of the first supporting plate (51); the first cutting piece (52) is connected to the inner wall of the first supporting plate (51); the first cutting piece (52) is slidably connected to the inner wall of the first sliding groove (4); the first spring (53) is sleeved on the surface of the first cutting piece (52); a first sealing ring (54) is connected to the surface of the first cutting piece (52); and a surface of the first sealing ring (54) is connected to the inner wall of the first sliding groove (4).

3. A cut-off structure of a cut-off valve according to claim 2, characterized in that: The second cutting assembly (9) comprises a second supporting plate (91), a second cutting piece (92) and a second spring (93); the second supporting plate (91) is mounted on the inner wall of the second slide groove (8); a through hole is arranged on the surface of the second supporting plate (91); the second cutting piece (92) is connected to the inner wall of the second supporting plate (91); the second cutting piece (92) is slidably connected to the inner wall of the second slide groove (8); the second spring (93) is sleeved on the surface of the second cutting piece (92); a second sealing ring (94) is connected to the surface of the second cutting piece (92); the surface of the second sealing ring (94) is connected to the inner wall of the second slide groove (8); one end of the first cutting piece (52) and the second cutting piece (92) both extend into the interior of the docking groove (11); and one end of the first cutting piece (52) is movably connected to one end of the second cutting piece (92).

4. A cut-off structure of a cut-off valve according to claim 1, characterized in that: The inner wall of the docking groove (11) is connected to a third sealing ring (13), and the inner wall of the third sealing ring (13) is connected to the surface of the connecting piece (7).

5. The cut-off structure of a cut-off valve according to claim 1, characterized in that: The surface of the mounting tube (6) is integrally formed and connected to a limiting portion (14); a first copper gasket (15) and a second copper gasket (16) are respectively installed on the surface of the mounting tube (6); the first copper gasket (15) and the second copper gasket (16) are respectively located on both sides of the limiting portion (14); the surface of the first copper gasket (15) is connected to the surface of the connecting piece (7); and the surface of the second copper gasket (16) is connected to the surface of the fixing column (2).

6. The cut-off structure of a cut-off valve according to claim 1, characterized in that: A third copper gasket (17) is sleeved on the surface of the docking rod (12), and the surface of the third copper gasket (17) is connected to the end surface of the piston rod (3).

7. The cut-off structure of a cut-off valve according to claim 1, characterized in that: A groove (18) is provided at one end of the valve housing (1), and a connecting spring (19) is installed on the inner wall of the groove (18).

8. The cut-off structure of a cut-off valve according to claim 1, characterized in that: A cap (20) is installed on the surface of the fixed pipe column (2), and the surface of the cap (20) is connected to the surface of the valve housing (1).

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