CN106622813B

CN106622813B - Long extension rod

Info

Publication number: CN106622813B
Application number: CN201611067155.2A
Authority: CN
Inventors: 李淑红
Original assignee: NINGBO LIS INDUSTRIAL Co Ltd
Current assignee: NINGBO LIS INDUSTRIAL Co Ltd
Priority date: 2016-11-28
Filing date: 2016-11-28
Publication date: 2020-02-07
Anticipated expiration: 2036-11-28
Also published as: CN106622813A

Abstract

The invention provides a long extension rod, comprising: the connecting pipe comprises an outer pipe, an inner pipe and a supporting plate, the inner pipe is positioned in the outer pipe, the supporting plate is positioned between the inner pipe and the outer pipe, one end of the supporting plate is connected with the outer wall of the inner pipe, and the other end of the supporting plate is connected with the inner wall of the outer pipe, so that the inner pipe is fixed in the outer pipe; the two connecting pipe screws are respectively connected to the front end and the rear end of the connecting pipe, discharge holes are formed in the connecting pipe screws and communicated with the inner pipe; the nozzle is connected to a connecting pipe screw positioned at the front end of the connecting pipe and is communicated with the discharge hole; the connecting screw is connected to a connecting pipe screw positioned at the rear end of the connecting pipe, a through hole is formed in the connecting screw, and the through hole is communicated with the discharge hole; the connecting nut is connected to the connecting screw and used for being connected with the spray gun; the invention has the beneficial effects that: when the length is longer, the stability and the strength of the structure can be ensured, the bending or the deformation is not easy to occur, and the use is very reliable.

Description

Long extension rod

Technical Field

The invention belongs to the technical field of spray gun accessories and relates to a long extension rod.

Background

The extension bar is a part applied to the spray gun, and the spray gun needs to be sprayed to a high place, so that the extension bar is required to increase the spraying distance of the spray gun.

At present, the extension rod can be divided into a long extension rod and a short extension rod according to the length, and as the name suggests, the long extension rod is the extension rod with longer length, and in some special occasions, for example, when higher objects need to be sprayed, the long extension rod needs to be connected to the tail end of the spray gun.

For example, a chinese patent with application number 201110275104.X discloses a spray gun extension operating handle, including spray gun fixing device, telescopic link, handle frame, spanner and stay cord, be equipped with fixed connection seat between spray gun fixing device and the telescopic link, fixed connection seat one end and telescopic link one end fixed connection, the fixed connection seat other end angularly adjustable ground is connected on spray gun fixing device rear end, fixed connection seat one side is equipped with the commentaries on classics round pin, and the relative one side of spray gun fixing device is equipped with hoist mechanism, the spanner is connected to stay cord one end, and the other end passes the commentaries on classics round pin, walks around spray gun fixing device front end and fixes on hoist mechanism.

The spray gun extension operating handle is an extension rod of a spray gun, and the extension of the spray gun extension operating handle can effectively realize extension, effectively adjust the angle of the spray gun, realize that the angle of a spray nozzle is approximately vertical to a sprayed surface, and improve the spraying effect of spraying at a long distance or a higher position.

However, in actual use, the problem that the use is unreliable exists, because when the extension rod of the spray gun plays a role in extension, a user holds the extension rod at the tail end by hand, the spray gun is positioned at the head end of the extension rod, the body of the extension rod can be acted by force, and the longer the extension rod is, the higher the possibility that the extension rod is deformed and distorted is, and even the extension rod can be broken.

Therefore, when the length of the existing extension rod is long, the stability and the strength of the structure cannot be guaranteed, the extension rod is easy to bend or deform and not reliable enough in use, and the extension rod cannot be made too long on the premise of guaranteeing the stability and the strength of the structure, so that the extension rod is limited in use, and a certain improvement space is provided.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a long extension rod.

The purpose of the invention can be realized by the following technical scheme: a long extension pole comprising:

the connecting pipe comprises an outer pipe, an inner pipe and a supporting plate, the inner pipe is positioned in the outer pipe, the supporting plate is positioned between the inner pipe and the outer pipe, one end of the supporting plate is connected with the outer wall of the inner pipe, and the other end of the supporting plate is connected with the inner wall of the outer pipe, so that the inner pipe is fixed in the outer pipe;

the two connecting pipe screws are respectively connected to the front end and the rear end of the connecting pipe, discharge holes are formed in the connecting pipe screws, and the discharge holes are communicated with the inner pipe;

the nozzle is connected to the connecting pipe screw at the front end of the connecting pipe and is communicated with the discharge hole;

the connecting screw is connected to the connecting pipe screw at the rear end of the connecting pipe, a through hole is formed in the connecting screw, and the through hole is communicated with the discharge hole;

and the connecting nut is connected to the connecting screw and is used for being connected with the spray gun.

Preferably, the connecting pipe screw extends along the inner pipe direction to be provided with a positioning end head communicated with the discharge hole, the positioning end head is in a circular pipe shape and is coaxially arranged with the inner pipe, and the positioning end head is sleeved at the end part of the inner pipe.

Preferably, one end of the connecting screw corresponding to the connecting nut is in threaded connection with a sealing gasket for sealing a spray gun nozzle.

Preferably, the support plate is long and arranged along the axial direction of the inner tube, and the support plate is integrally arranged with the inner tube and the outer tube.

Preferably, the number of the supporting plates is three, and the supporting plates are uniformly distributed between the inner pipe and the outer pipe around the axis of the outer pipe.

Preferably, the end part of the inner tube is provided with an annular stepped groove matched with the positioning end, and a sealing ring is arranged between the positioning end and the annular stepped groove.

Preferably, the cross section of the discharge hole is conical, and one end of the discharge hole close to the inner pipe is a small opening end.

Preferably, the connecting nut is connected with a sheath for protecting the spray gun nozzle.

Preferably, an internal thread is arranged on the connecting pipe screw, external threads are arranged at two ends of the outer pipe, and the connecting pipe screw is connected to the outer pipe through the internal thread and the external threads.

Compared with the prior art, the invention has the beneficial effects that:

1. when the length is longer, the stability and the strength of the structure can be ensured, the bending or the deformation is not easy to occur, and the use is very reliable.

2. On the one hand, the support plate, the inner tube and the outer tube are shaped and arranged in such a way as to withstand the maximum bending forces and thus to prevent their deformation, and on the other hand, the inner tube and the outer tube are hollow and only the support plate is connected, so that they are light in weight and light in weight.

3. The inner tube can be supported from three direction to three backup pads to further improve the reliable degree of being connected between inner tube and the outer tube, and it can be on the basis of the weight of the minimize connecting pipe, guarantee the best stability and intensity of connecting pipe.

4. The sealing structure formed by combining the inner pipe, the annular stepped groove and the sealing ring can achieve a very good sealing effect.

Drawings

FIG. 1 is a structural view of a long extension pole of the present invention;

FIG. 2 is a front view of the long extension pole of the present invention;

FIG. 3 is a schematic sectional view taken along line A-a of FIG. 2;

FIG. 4 is a schematic view of the position of the inner and outer tubes of the present invention;

FIG. 5 is an enlarged view of portion A of FIG. 3;

FIG. 6 is an enlarged view of the portion B of FIG. 3;

FIG. 7 is a schematic view of the coupling nut of the present invention;

FIG. 8 is a schematic view of a connection tube screw according to the present invention;

FIG. 9 is a schematic view of a nozzle of the present invention.

In the figure, 100, connecting pipe; 110. an outer tube; 120. an inner tube; 130. a support plate; 200. connecting a pipe screw; 210. a discharge hole; 220. positioning an end head; 230. a seal ring; 300. a nozzle; 400. a connecting screw; 410. a through hole; 420. a gasket; 500. a connecting nut; 600. a sheath.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, 3, 7, 8, and 9, a long extension pole includes: the connection pipe 100, the two connection pipe screws 200, the nozzle 300, the connection screw 400, and the connection nut 500 have a relatively long length, so that the spraying distance of the spray gun can be greatly extended.

As shown in fig. 3, 4, 5 and 6, in order to ensure the optimal structural strength and stability of the connection pipe 100 without affecting the use of the spray gun, and thus avoid deformation and distortion of the connection pipe 100 during use, the connection pipe 100 is configured as an inner and outer double pipe structure, the connection pipe 100 includes an outer pipe 110, an inner pipe 120, and a support plate 130, the inner pipe 120 is located inside the outer pipe 110, and both of them are preferably coaxially arranged with the inner pipe 120 and the outer pipe 110, the support plate 130 is located between the inner pipe 120 and the outer pipe 110, and one end of the support plate 130 is connected to the outer wall of the inner pipe 120 and the other end is connected to the inner wall of the outer pipe 110, so as to fix the inner pipe 120 inside the outer pipe 110.

The connection pipe 100 composed of the inner pipe 120, the outer pipe 110 and the support plate 130 is very firm, especially can bear the heavy gravity of the other end without bending, and it should be noted that the coating flows through the inner pipe 120, the outer pipe 110 plays a role of fixing and supporting the inner pipe 120, and enhances the structural strength of the inner pipe 120, and the support plate 130 can connect the inner pipe 120 with the appearance as a whole.

As shown in fig. 1, 2, 3, 5, and 6, the connecting pipe screw 200 is similar to a frustum, the inner diameter of the connecting pipe screw 200 is matched with the outer pipe 110, the two connecting pipe screws 200 are respectively connected to the front end and the rear end of the connecting pipe 100, a discharge hole 210 is formed in the connecting pipe screw 200, and the discharge hole 210 is communicated with the inner pipe 120; connection pipe screw 200 is connected to both ends of connection pipe 100 by means of screw connection, so that both ends of connection pipe 100 can be connected to nozzle 300 and connection screw 400.

The lower end of the nozzle 300 is formed with a bolt-shaped end which is screw-coupled to the outer port of the discharge hole 210, and further, is coupled to the connection pipe screw 200 located at the front end of the connection pipe 100, and the nozzle 300 is communicated with the discharge hole 210.

The connecting screw 400 is connected to the connecting pipe screw 200 at the rear end of the connecting pipe 100, a through hole 410 is formed in the connecting screw 400, and the through hole 410 is communicated with the discharging hole 210; in short, the connection screw 400 is screwed into the discharging hole 210.

And the structure of the connecting screw 400 is different from that of the existing screw, it is bolt-shaped, and one end of the connecting screw 400 has screw threads, and the other end has a flange-shaped structure, when the connecting screw 400 is installed, firstly, it passes through the connecting nut 500, the flange-shaped structure on the connecting screw 400 blocks the opening of the connecting nut 500, then one end with screw threads is screwed into the discharging hole 210, thereby fixing the connecting nut 500 on the connecting screw 200, the connecting nut 500 is used for connecting with the spray gun.

As shown in fig. 1, 2, 3, 7, 8 and 9, in terms of the overall structure, the coupling nut 500, the coupling screw 400, the first coupling pipe screw 200, the coupling pipe 100, the second coupling pipe screw 200 and the nozzle 300 are sequentially coupled, the coupling nut 500 is used for coupling to the spray gun, and the coupling screw 400 is in communication with the coupling screw 400, so that the paint can enter the discharge hole 210 from the through hole 410, enter the inner pipe 120 from the discharge hole 210, enter the discharge hole 210 of the first coupling pipe screw 200 along the inner pipe 120, and be sprayed out along the nozzle 300.

As shown in fig. 1, 2, 3, 4, 5, 6, 7, 8 and 9, in actual use, since the support plate 130 is located between the inner tube 120 and the outer tube 110, and one end of the support plate 130 is connected to the outer wall of the inner tube 120 and the other end is connected to the inner wall of the outer tube 110, thereby fixing the inner tube 120 in the outer tube 110, the user holds the spray gun and attaches the long extension rod to the spray gun, the force applied thereto is basically received by the connection tube 100, and the special structure of the connection tube 100 in which the inner and outer tubes 110 are coupled by the support plate 130 has a very stable structure and strength, does not generate bending deformation, and effectively ensures the reliability of the long extension rod in use.

As shown in fig. 5 and fig. 6, on the basis of the above embodiment, the connecting pipe screw 200 extends along the inner pipe 120 to form a positioning end 220 communicating with the discharge hole 210, the positioning end 220 is in a circular pipe shape, and the positioning end 220 is coaxially disposed with the inner pipe 120, where it is noted that a part of the discharge hole 210 is located in the positioning end 220, in short, the discharge hole 210 is axially opened from one end of the connecting pipe screw 200 to the outermost end of the positioning end 220, and the positioning end 220 is sleeved on the end of the inner pipe 120.

This location end 220 can be directly be connected with inner tube 120 to make the butt joint of discharge opening 210 and inner tube 120 more accurate, thereby further improve the leakproofness of long extension rod, prevent that coating from leaking.

As shown in fig. 3, 6 and 7, in addition to the above embodiments, a sealing gasket 420 for sealing the spray gun nozzle 300 is threadedly connected to one end of the connection screw 400 corresponding to the connection nut 500, and when the spray gun is mounted on the connection nut 500, the spray gun nozzle will abut against the sealing gasket 420 on the connection screw 400, so that the sealing performance between the spray gun and the long extension rod can be further improved, and the leakage can be prevented.

As shown in fig. 3 and 4, on the basis of the above embodiment, the support plate 130 is long and is disposed along the axial direction of the inner tube 120, and the support plate 130 is disposed integrally with the inner tube 120 and the outer tube 110, since the support plate 130 is a long plate-shaped structure and is vertically disposed between the inner tube 120 and the outer tube 110, when the connection tube 100 is stressed, the support plate 130 plays a main supporting role, and since the connection tube 100 is stressed mainly in the radial direction, the direction of the stress of the support plate 130 is exactly the direction of the maximum thickness thereof; the support plate 130, the inner tube 120 and the outer tube 110 are formed in such a shape and position that they can receive the maximum bending force to prevent deformation thereof, on the one hand, and the support plate 130 is coupled to the inner tube 120 and the outer tube 110, which are hollow, on the other hand, so that the overall weight thereof is light and the use thereof is light.

As shown in fig. 4, on the basis of the above embodiment, the number of the support plates is three, and the support plates are uniformly distributed between the inner pipe 120 and the outer pipe 110 around the axis of the outer pipe 110, the included angle between each support plate is 120 degrees, the three support plates can support the inner pipe 120 from three directions, so as to further improve the connection reliability between the inner pipe 120 and the outer pipe 110, and the three support plates can ensure the optimal stability and strength of the connection pipe 100 on the basis of reducing the weight of the connection pipe 100 as much as possible; and when the supporting rod is subjected to acting force in any direction except the radial direction, the three uniformly distributed supporting plates can be shared and borne.

As shown in fig. 5 and 6, on the basis of the above embodiment, an annular stepped groove adapted to the positioning end 220 is formed at an end of the inner tube 120, the positioning end 220 and the sealing ring 230 are disposed between the annular stepped grooves, the sealing ring 230 is adapted to the stepped portion of the annular stepped groove, the annular stepped groove abuts against the sealing ring 230, the side wall of the annular stepped groove is attached to the inner wall of the positioning end 220, and the inner tube 120, the annular stepped groove and the sealing ring 230 form a sealing structure, so that a very good sealing effect can be achieved.

As shown in fig. 5, on the basis of the above embodiment, the cross section of the discharge hole 210 is tapered, one end of the discharge hole 210 close to the inner tube 120 is a small-mouth end, and a thread for connecting the nozzle 300 is further formed on one side of the large-mouth end of the discharge hole 210, so that the discharge hole 210 with such a shape can be well connected with the nozzle 300.

As shown in fig. 6, in addition to the above-mentioned embodiment, the connection nut 500 is connected with a sheath 600 for protecting the spray gun nozzle 300, the sheath 600 can play a role of dust prevention and protection, and the sheath 600 is screwed to the outer opening of the connection nut 500 and is directly detached when in use.

As shown in fig. 3, 5 and 6, in addition to the above embodiment, the connection pipe screw 200 is provided with an internal thread, both ends of the outer pipe 110 are provided with external threads, and the connection pipe screw 200 is connected to the outer pipe 110 through the internal thread and the external threads.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A long extension pole, comprising:

a connecting pipe including an outer pipe, an inner pipe and a support plate, the inner pipe being located inside the outer pipe, the support plate being located between the inner pipe and the outer pipe, and one end of the support plate being connected to an outer wall of the inner pipe and the other end being connected to an inner wall of the outer pipe, thereby fixing the inner pipe inside the outer pipe, the support plate being elongated and being disposed along an axial direction of the inner pipe, and the support plate being integrally disposed with the inner pipe and the outer pipe;

the connecting pipe screw is connected to the front end and the rear end of the connecting pipe respectively, a discharge hole is formed in the connecting pipe screw and communicated with the inner pipe, the cross section of the discharge hole is conical, one end, close to the inner pipe, of the discharge hole is a small-opening end, an internal thread is arranged on the connecting pipe screw, external threads are formed in two ends of the outer pipe, and the connecting pipe screw is connected to the outer pipe through the internal thread and the external threads;

the connecting screw cap is connected to the connecting screw and used for being connected with a spray gun, and a sheath used for protecting a spray nozzle of the spray gun is connected to the connecting screw cap;

the connecting pipe screw along the inner tube direction extend have with the location end of discharge opening intercommunication, the location end be the pipe form and the location end with the inner tube is coaxial to be set up, the location end cup joints the tip of inner tube, the connecting screw corresponds one end threaded connection of connecting nut has the sealed pad of sealed spray gun nozzle.

2. The elongate pole of claim 1, wherein: the number of the supporting plates is three, and the supporting plates are uniformly distributed between the inner pipe and the outer pipe around the axis of the outer pipe.

3. The elongate pole of claim 1, wherein: the end of the inner tube is provided with an annular stepped groove matched with the positioning end, and a sealing ring is arranged between the positioning end and the annular stepped groove.