CN221743326U - Pressure regulating structure of liquefied gas spray gun - Google Patents

Abstract

The utility model belongs to the technical field of spray guns, and relates to a pressure regulating structure of a liquefied gas spray gun, including a valve body, a valve cavity connecting an air inlet end and an air outlet end is arranged in the valve body, a valve core is slidably arranged in the valve cavity, a valve stem is arranged above the valve core, a conical surface that contacts the valve core is arranged at the bottom of the valve stem, when the valve stem deflects, the valve core is driven to move upward by a first spring below it, a valve cover is screwed on the valve body, a through hole for the valve stem to pass through is arranged on the valve cover, a deflection gap is left between the valve stem and the through hole, a second spring that drives the valve stem to reset is arranged between the valve stem and the valve cover, a hand pressure handle that drives the valve stem to deflect is arranged on the outer sleeve of the valve stem, and a pressure regulating knob that drives the valve stem to move axially is arranged on the upper end of the valve stem. The pressure regulating structure of the liquefied gas spray gun provided by the utility model has the advantages of simple structure, small space occupation, convenient use, and sensitive pressure regulation.

Description

A pressure regulating structure for a liquefied gas spray gun

Technical Field

The utility model belongs to the technical field of spray guns and relates to a pressure regulating structure of a liquefied gas spray gun.

Background Art

The liquefied gas flamethrower is a heating tool that uses liquefied gas as fuel. If used correctly, it can reach a high temperature of 1300°. It has the advantages of low cost, safety, convenience, no pollution, and stable performance. It is widely used in occasions that require flame or heating.

Chinese utility model patent CN 210153807 U (announcement date 2020.03.17) discloses a liquefied gas flamethrower. It includes a gun barrel, a pressure regulating valve, an air pipe and a nozzle connected in sequence, and a handle is mounted on the outside of the gun barrel; the two ends of the handle are respectively provided with a gun barrel fixing part for fixing the gun barrel, and the gun barrel fixing part is in the shape of an inner hexagonal tube; the gun barrel is in the shape of an outer hexagonal tube, and its two ends are respectively clamped at the gun barrel fixing part; the pressure regulating valve includes a valve body, a rotary switch and a pressure regulating handle; a fixing card is provided between the pressure regulating valve and the handle to prevent the pressure regulating handle from rotating.

The pressure regulating structure of the above-mentioned liquefied gas spray gun includes a valve body, a rotary switch and a pressure regulating handle, wherein the rotary switch and the pressure regulating handle are arranged on both sides of the valve body, which is inconvenient to use. This structure also occupies too much space, and the pressure regulating sensitivity is not high.

Utility Model Content

The utility model aims at the deficiencies of the prior art and provides a pressure regulating structure for a liquefied gas spray gun, which has the advantages of simple structure, small occupied space, convenient use and sensitive pressure regulation.

In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions:

A pressure regulating structure for a liquefied gas spray gun comprises a valve body, wherein the valve body is provided with a valve cavity connecting an air inlet end and an air outlet end, a valve core is slidably arranged in the valve cavity, a valve stem is arranged above the valve core, a conical surface is arranged at the bottom of the valve stem, when the valve stem is deflected, the valve core is driven to move upward by a first spring therebelow, a valve cover is screwed on the valve body, a through hole is arranged on the valve cover for the valve stem to pass through, a deflection gap is left between the valve stem and the through hole, a second spring for driving the valve stem to return to its original position is arranged between the valve stem and the valve cover, a hand pressure handle is arranged on the valve stem outer sleeve to drive the valve stem to deflect, and a pressure regulating knob is arranged on the upper end of the valve stem to drive the valve stem to move axially.

In the above-mentioned pressure regulating structure of a liquefied gas spray gun, the valve stem is externally screwed with a valve stem seat, the bottom of the valve stem seat is provided with an outer edge ring that abuts against the upper end of the valve body, the two ends of the second spring respectively abut against the inner top and the outer edge ring of the valve cover, the hand pressure handle is sleeved on the valve stem seat and drives the valve stem seat and the valve stem to deflect synchronously. Furthermore, the mounting end cover of the hand pressure handle is provided on the valve cover and a deflection gap is left between the hand pressure handle and the valve cover.

In the above-mentioned pressure regulating structure of a liquefied gas spray gun, the pressure regulating knob is circumferentially fixed to the top of the valve stem, the pressure regulating knob drives the valve stem to rotate and generate axial displacement, the pressure regulating knob is located above the hand pressure handle and a gap is left between the hand pressure handle. Furthermore, a mutually matching polygonal structure is provided between the pressure regulating knob and the valve stem.

In the above-mentioned pressure regulating structure of a liquefied gas spray gun, an internal threaded hole is provided on the top of the valve stem, and a mounting hole matching with a screw is provided on the pressure regulating knob. After the screw passes through the mounting hole, it is screwed with the internal threaded hole and locks the pressure regulating knob.

In the above-mentioned pressure regulating structure of a liquefied gas spray gun, the lower end of the valve cavity is set as a conical cavity, the lower end of the valve core is set as a conical part matched therewith, the upper end of the valve core is sleeved with an upper sealing ring that seals with the inner wall of the valve cavity, and the upper part of the conical part is sleeved with a lower sealing ring that seals with the conical cavity. The upper sealing ring is always in a sealed state; after the valve core moves upward, the lower sealing ring is separated from the conical cavity, so that the valve cavity connects the air inlet end and the air outlet end.

In the above-mentioned pressure regulating structure of a liquefied gas spray gun, a spring cavity connected to the valve cavity is arranged below the valve cavity, a spring seat extending into the spring cavity is arranged at the bottom of the valve core, and the first spring is installed in the spring cavity and its upper end is sleeved on the spring seat.

In the above-mentioned pressure regulating structure of a liquefied gas spray gun, the air inlet end is connected to the spring cavity through the air inlet hole, the air outlet end is connected to the conical cavity through the air outlet hole, and the air inlet end and the air outlet end are staggered.

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

1. The utility model provides a pressure regulating structure for a liquefied gas spray gun, in which a hand pressure handle and a pressure regulating knob are arranged on the same side of a valve body, which is more convenient to use and occupies less space.

2. The utility model improves the pressure regulating method of the pressure regulating structure, drives the axial displacement of the valve core by deflecting the valve stem with a conical structure, thereby changing the air intake clearance of the valve cavity, and has the advantages of easy use and sensitive pressure regulation.

3. The utility model can also fine-tune the air intake gap of the valve cavity through the pressure regulating knob, and by keeping the small gap of the valve cavity normally open, it can be further convenient to use. For example, a very small amount of gas can be used to keep the flame of the spray gun in the gap between uses to save fuel gas; the pressure regulating structure can also be set to the normally open state during the ignition stage, making ignition more convenient.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a perspective view of the utility model;

Fig. 2 is a cross-sectional view of the utility model;

FIG3 is a partial enlarged view of point A in FIG2 ;

Figure numerals: 1. valve body; 2. air inlet end; 3. air outlet end; 4. valve chamber; 5. valve core; 6. valve stem; 7. first spring; 8. valve cover; 9. deflection gap; 10. second spring; 11. hand pressure handle; 12. pressure regulating knob; 13. valve stem seat; 14. outer ring; 15. screw; 16. conical chamber; 17. conical part; 18. upper sealing ring; 19. lower sealing ring; 20. spring chamber; 21. spring seat; 22. air inlet hole; 23. air outlet hole.

DETAILED DESCRIPTION

The present invention is further described below with reference to the accompanying drawings using specific embodiments, see Figures 1-3:

A pressure regulating structure for a liquefied gas spray gun comprises a valve body 1, wherein the valve body 1 is provided with a valve cavity 4 connecting an air inlet end 2 and an air outlet end 3, a valve core 5 is slidably provided in the valve cavity 4, a valve stem 6 is provided above the valve core 5, a conical surface which contacts the valve core 5 is provided at the bottom of the valve stem 6, when the valve stem 6 is deflected, the valve core 5 is driven to move upward by a first spring 7 thereunder, a valve cover 8 is screwed on the valve body 1, a through hole is provided on the valve cover 8 for the valve stem 6 to pass through, a deflection gap 9 is left between the valve stem 6 and the through hole, a second spring 10 which drives the valve stem 6 to return to its original position is provided between the valve stem 6 and the valve cover 8, a hand pressure handle 11 which drives the valve stem 6 to deflect is provided on the outer sleeve of the valve stem 6, and a pressure regulating knob 12 which drives the valve stem 6 to move axially is provided on the upper end of the valve stem 6.

In this embodiment, the position of the valve stem 6 is adjusted by the pressure-adjusting knob 12 to fine-tune the air intake clearance of the valve cavity. The pressure-adjusting principle is as follows: the pressure-adjusting knob 12 adjusts the axial position of the valve stem 6. When the valve stem 6 moves upward, the valve core 5 moves upward accordingly, the valve cavity 4 increases, and the air intake volume increases. When the valve stem 6 moves downward, the valve cavity 4 decreases, and the air intake volume decreases. When it moves to the lowest end, the valve cavity 4 is completely closed.

When in use, the pressure is adjusted by the hand pressure handle 11 to adjust the flame size. The pressure adjustment principle is: by pressing the hand pressure handle 11, one end of the valve stem 6 will rise, and the valve stem 6 will deflect. After the valve stem 6 deflects, the bottom of its cone surface will produce an oblique upward displacement, and the valve core 5 that contacts the cone surface will move upward, thereby increasing the air intake. By changing the pressing amplitude of the hand pressure handle 11, the air intake can be changed, and then the size of the ejected flame can be adjusted.

Furthermore, the valve stem 6 is externally screwed with a valve stem seat 13, and the bottom of the valve stem seat 13 is provided with an outer edge ring 14 that abuts against the upper end of the valve body 1. The two ends of the second spring 10 respectively abut against the inner top of the valve cover 8 and the outer edge ring 14. The hand pressure handle 11 is mounted on the valve stem seat 13 and drives the valve stem seat 13 and the valve stem 6 to deflect synchronously. Through the action of the second spring 10, in the initial state, the second spring 10 presses the valve stem seat 13 against the outer edge ring 14. When the valve stem 6 and the valve stem seat 13 are driven to deflect by the hand pressure handle 11, the valve stem seat 13 deflects with the contact point of the outer edge ring 14 on one side of the valve body 1 as the base point, and at the same time, the second spring 10 is deformed. After the hand pressure handle 11 is released, the second spring 10 drives the valve stem seat 13 to reset. Furthermore, the mounting end cover of the hand pressure handle 11 is provided on the valve cover 8 and a deflection gap 9 is left between the valve cover 8.

In this embodiment, the specific structure of the pressure regulating knob 12 driving the valve stem 6 to axially displace is as follows: the pressure regulating knob 12 is circumferentially fixed to the top of the valve stem 6, and the pressure regulating knob 12 drives the valve stem 6 to rotate and generate axial displacement. In order to facilitate the use of the pressure regulating knob 12 and the hand pressure handle 11, the pressure regulating knob 12 is located above the hand pressure handle 11 and a gap is left between the hand pressure handle 11. Furthermore, a mutually matching polygonal structure is provided between the pressure regulating knob 12 and the valve stem 6, such as a mutually matching hexagonal column and a hexagonal groove.

Furthermore, an internal threaded hole is provided on the top of the valve stem 6 , and a mounting hole matching with the screw 15 is provided on the pressure regulating knob 12 . After passing through the mounting hole, the screw 15 is screwed with the internal threaded hole and locks the pressure regulating knob 12 .

Referring to FIG. 3 , the lower end of the valve cavity 4 is set as a tapered cavity 16, the lower end of the valve core 5 is set as a tapered portion 17 matched therewith, the upper end of the valve core 5 is sleeved with an upper sealing ring 18 that seals with the inner wall of the valve cavity 4, and the tapered portion 17 is sleeved with a lower sealing ring 19 that seals with the tapered cavity 16. The upper sealing ring 18 is always in a sealed state; after the valve core 5 moves upward, the lower sealing ring 19 is separated from the tapered cavity 16, so that the valve cavity 4 is connected to the air inlet end 2 and the air outlet end 3.

In this embodiment, the installation structure of the first spring 7 is: a spring chamber 20 connected to the valve chamber 4 is provided below the valve chamber 4, a spring seat 21 extending into the spring chamber 20 is provided at the bottom of the valve core 5, and the first spring 7 is installed in the spring chamber 20, and its upper end is sleeved on the spring seat 21.

In order to more precisely adjust the air intake volume, the air intake end 2 is connected to the spring cavity 20 through the air intake hole 22, and the air outlet end 3 is connected to the conical cavity 16 through the air outlet hole 23. The air intake end 2 and the air outlet end 3 are staggered.

The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a pressure regulating structure of liquefied gas spray gun, includes valve body (1), be provided with in valve body (1) valve pocket (4) of connecting inlet end (2) and outlet end (3), the interior sliding of valve pocket (4) is provided with case (5), a serial communication port, the top of case (5) is provided with valve rod (6), the bottom of case (6) is provided with the conical surface of being connected with case (5) conflict, during valve rod (6) deflection, case (5) are by the first spring (7) drive of its below upwards move, the spiro union has valve gap (8) on valve body (1), be provided with the through-hole that supplies valve rod (6) to wear out on valve gap (8), leave deflection clearance (9) between valve rod (6) and through-hole, be provided with between valve rod (6) and valve gap (8) and drive valve rod (6) and drive the second spring (10) that reset, valve rod (6) bottom is provided with the manual handle (11) that drive its deflected, valve rod (6) upper end is provided with the knob (12) of axial displacement of drive.

2. The pressure regulating structure of the liquefied gas spray gun according to claim 1, wherein the valve rod (6) is externally connected with a valve rod seat (13) in a threaded manner, an outer edge ring (14) propped against the upper end of the valve body (1) is arranged at the bottom of the valve rod seat (13), two ends of the second spring (10) respectively prop against the inner top and the outer edge ring (14) of the valve cover (8), and the hand pressing handle (11) is sleeved on the valve rod seat (13) and drives the valve rod seat (13) and the valve rod (6) to synchronously deflect.

3. The pressure regulating structure of the liquefied gas spray gun according to claim 2, wherein the pressure regulating knob (12) is circumferentially fixed at the top of the valve rod (6), the pressure regulating knob (12) drives the valve rod (6) to rotate and axially displace, and the pressure regulating knob (12) is located above the hand pressing handle (11) and is spaced from the hand pressing handle (11).

4. A pressure regulating structure of a liquefied gas spray gun according to claim 3, characterized in that the top of the valve rod (6) is provided with an internal thread hole, the pressure regulating knob (12) is provided with a mounting hole matched with a screw (15), and the screw (15) passes through the mounting hole and then is screwed with the internal thread hole to lock the pressure regulating knob (12).

5. The pressure regulating structure of the liquefied gas spray gun according to claim 1, wherein the lower end of the valve cavity (4) is provided with a conical cavity (16), the lower end of the valve core (5) is provided with a conical part (17) matched with the valve cavity, the upper end of the valve core (5) is sleeved with an upper sealing ring (18) matched and sealed with the inner wall of the valve cavity (4), and the conical part (17) is sleeved with a lower sealing ring (19) matched and sealed with the conical cavity (16).

6. The pressure regulating structure of a liquefied gas spray gun according to claim 5, characterized in that a spring cavity (20) communicated with the valve cavity (4) is arranged below the valve cavity, a spring seat (21) extending into the spring cavity (20) is arranged at the bottom of the valve core (5), and the first spring (7) is installed in the spring cavity (20) and the upper end of the first spring is sleeved on the spring seat (21).

7. The pressure regulating structure of the liquefied gas spray gun according to claim 6, wherein the air inlet end (2) is communicated with the spring cavity (20) through an air inlet hole (22), the air outlet end (3) is communicated with the conical cavity (16) through an air outlet hole (23), and the air inlet end (2) and the air outlet end (3) are arranged in a staggered mode.