PFA powder spray gun with convenient-to-replace gun head

Abstract

The utility model provides a PFA powder spray gun with a convenient-to-replace gun head, which comprises a powder delivery pipe and a spray gun head, a sealing element is arranged on the powder delivery pipe, an auxiliary sealing element is arranged on the spray gun head, the sealing element and the auxiliary sealing element are mutually sleeved, an installation sliding cylinder is arranged on the powder delivery pipe in a sliding manner, and the installation sliding cylinder is connected with the spray gun head. A setting space is formed in the inner bottom of the mounting sliding barrel, a plurality of clamping jaw assemblies are arranged in the setting space, and each clamping jaw assembly comprises a clamping jaw piece. Compared with the prior art, the PFA powder spray gun has the advantages that the design is simple, follow-up gun head replacement is convenient, the sealing performance of the gun head is high after follow-up dismounting and mounting, the sealing stability of connection between the powder conveying pipe and the spray gun head is guaranteed, and the using effect of the PFA powder spray gun is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a PFA powder spray gun with gun head convenient to replace belongs to spray gun field. BACKGROUND

[0002] PFA powder is tetrafluoroethylene and perfluoropropyl ethylene copolymer, also known as soluble polytetrafluoroethylene, the existing PFA powder, particle size D50 is 5-30 mu m, more than 90% of sphericity is 10-30%, fluidity is 30-100s / 50g, purity is 90%-95%, melting point is 300-400 DEG C, surface roughness is Ra0.5-0.8 mu m.

[0003] At present, PFA powder needs to be sprayed on the surface of some manufacturing devices, and the surface of the manufacturing device is sprayed with a PFA powder layer to enhance the surface hardness, corrosion resistance and other effects, so the PFA powder plays an important role in the production of hardness, corrosion resistance products such as manufacturing devices, but the device spraying needs to use a spray gun to spray high-pressure gas, and then spray the powder, because the spray gun is easy to block after being used for a period of time, and different production processes need different types and pressures of substances sprayed by the spray gun, so the spray head needs to be replaced, and now the spray head of the spray gun is not only replaced complicatedly, but also needs to be reassembled with a sealing element, which affects the production efficiency. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiencies in the prior art, the utility model aims at providing a PFA powder spray gun with gun head convenient to replace.

[0005] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme:

[0006] A PFA powder spray gun with gun head convenient to replace, comprising a powder conveying pipe and a spray gun head, a sealing element is arranged on the powder conveying pipe, a secondary sealing element is arranged on the spray gun head, the sealing element and the secondary sealing element are mutually sleeved, a mounting sliding cylinder is slidably arranged on the powder conveying pipe, a setting space is formed in the bottom of the mounting sliding cylinder, a plurality of claw assemblies are arranged in the setting space, the claw assembly comprises a claw piece, the claw piece is hingedly arranged on the outer surface of the powder conveying pipe at one side of the top end, a hinge rod is hingedly arranged at the other side of the top end of the claw piece, a hinge block is hingedly arranged at the top end of the hinge rod, the hinge block and the setting space are fixedly connected through a connecting rod, and a fixing element for fixing the mounting sliding cylinder is further sleeved on the outer surface of the powder conveying pipe.

[0007] Further, the fixing element comprises a threaded sleeve arranged on the outer surface of the powder conveying pipe in a threaded manner, and the inner wall of the threaded sleeve is arranged on the outer surface of the mounting sliding cylinder in a threaded manner.

[0008] Further, a plurality of positioning sliding grooves are formed on the outer wall of the powder conveying pipe, a positioning sliding rod is fixedly arranged on the inner side wall of the mounting sliding cylinder and extends into the positioning sliding groove, the sealing member comprises a sealing sleeve fixedly arranged on the powder conveying pipe, and a rubber ring I is attached to the inner wall of the sealing sleeve.

[0009] Further, a stepped groove is formed on the inner bottom of the powder conveying pipe, and a rubber ring II is attached to the inner wall of the stepped groove.

[0010] Further, the auxiliary sealing member comprises an auxiliary sealing sleeve fixedly arranged on the spray gun head, and a rubber ring III is attached to the inner wall of the auxiliary sealing sleeve.

[0011] Further, a reinforcing assembly is fixedly arranged on the outer wall of the threaded cylinder, the reinforcing assembly comprises an L-shaped plate on the outer wall of the threaded cylinder, a reinforcing pull rod is arranged through the L-shaped plate and the threaded cylinder, and a reinforcing hole is formed in the outer surface of the mounting sliding cylinder and corresponds to the reinforcing pull rod.

[0012] Further, a compression spring is fixedly arranged on the inner side wall of the L-shaped plate, the compression spring is sleeved on the outer surface of the reinforcing pull rod, and the other end of the compression spring is fixed on the outer wall of the reinforcing pull rod.

[0013] Further, a gas conveying pipe is further connected to the powder conveying pipe, the gas conveying pipe is connected and communicated with the gas inlet, and the bottom of the spray gun head is provided with an ejection hole.

[0014] The application has the following beneficial effects:

[0015] The application utilizes the connecting relationship that the sealing member and the auxiliary sealing member are sleeved with each other, so that the sealing property of the connection between the powder conveying pipe and the spray gun head is ensured after installation, and the stability of the PFA powder ejection work is ensured.

[0016] After the powder conveying pipe and the spray gun head are mutually connected, the mounting sliding cylinder is manually rotated by a person, so that the hinged blocks connected with the connecting rod are driven to move linearly downward, the clamping pawl members indirectly connected with the hinged blocks are linked on the outer surface of the powder conveying pipe, therefore, when the hinged blocks move downward, the clamping pawl members are driven to be in a clamping state or an open state, and the designed clamping pawl members are finally clamped on the bottom end surface of the auxiliary sealing member of the spray gun head, so that the fixing of the connection between the powder conveying pipe and the spray gun head is completed.

[0017] The application has the following advantages: the design is simple, the subsequent replacement of the gun head is relatively convenient, the sealing property of the gun head after disassembly and installation is high, the sealing stability of the connection between the powder conveying pipe and the spray gun head is ensured, and the use effect of the PFA powder spray gun is increased. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings described in the following embodiments are only some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0019] Figure 1 It is a front view of the PFA powder spray gun with the gun head convenient to replace of the present application.

[0020] Figure 2 It is a schematic diagram of the installation sliding cylinder of the PFA powder spray gun with the gun head convenient to replace of the present application.

[0021] Figure 3 It is a schematic diagram of the reinforcing assembly of the PFA powder spray gun with the gun head convenient to replace of the present application.

[0022] Figure 4 It is a schematic diagram of the spray gun head of the PFA powder spray gun with the gun head convenient to replace of the present application.

[0023] In the figure: 1, powder conveying pipe; 2, spray gun head; 3, installation sliding cylinder; 4, setting space; 5, clamping jaw part; 6, hinged rod; 7, hinged block; 8, connecting rod; 9, threaded cylinder; 10, sealing sleeve; 11, rubber ring I; 12, stepped groove; 13, rubber ring II; 14, auxiliary sealing sleeve; 15, rubber ring III; 16, positioning sliding groove; 17, positioning sliding rod; 18, L-shaped plate; 19, reinforcing pull rod; 20, reinforcing hole; 21, compression spring; 22, partition plate. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0025] Please refer to Figures 1-4The utility model provides a technical scheme: a PFA powder spray gun convenient to replace gun head, including powder delivery pipe 1 and spray gun head 2, be equipped with sealing element on powder delivery pipe 1, be equipped with vice sealing element on spray gun head 2, sealing element and vice sealing element mutually sleeve joint, the slidingly arranged installation sliding cylinder 3 is established on powder delivery pipe 1, the inside bottom of installation sliding cylinder 3 is equipped with the setting space 4, the inside bottom is equipped with a plurality of claw subassembly in setting space 4, claw subassembly includes claw piece 5, the top one side of claw piece 5 is hinged and is established in the outer surface of powder delivery pipe 1, the top other side of claw piece 5 is hinged and is equipped with articulated rod 6, articulated rod 6 top end articulatedly arranged has articulated block 7, articulated block 7 and setting space 4 are fixedly connected through connecting rod 8, the outer surface of powder delivery pipe 1 still is equipped with the fixed mounting sliding cylinder 3 of fixed piece.

[0026] Referring to Figures 1-3 The fixed piece includes threaded sleeve in the outer surface of powder delivery pipe 1 threaded cylinder 9, the inner wall of threaded cylinder 9 and threaded sleeve in the outer surface of installation sliding cylinder 3, a plurality of positioning sliding slot 16 are seted up on the outer wall of powder delivery pipe 1, the inside wall of installation sliding cylinder 3 is fixedly provided with the positioning sliding rod 17 extending into the inside of positioning sliding slot 16, the sealing element includes fixed sleeve in the powder delivery pipe 1 sealing sleeve 10, rubber ring one 11 is pasted in the inner wall of sealing sleeve 10, the inside bottom of powder delivery pipe 1 is equipped with step groove 12, rubber ring two 13 is pasted in the inner wall of step groove 12, the vice sealing element includes fixed sleeve in the spray gun head 2 vice sealing sleeve 14, rubber ring three 15 is pasted in the inner wall of vice sealing sleeve 14.

[0027] The specific installation process of powder delivery pipe 1 and spray gun head 2 is that spray gun head 2 is directly inserted into powder delivery pipe 1, rubber ring two 13 of step groove 12 of the inner wall of powder delivery pipe 1 is then wrapped around the outer surface of the insertion end of spray gun head 2, vice sealing sleeve 14 is wrapped around the outer surface of powder delivery pipe 1 at this time, rubber ring three 15 of the inner wall of vice sealing sleeve 14 is wrapped around the outer surface of powder delivery pipe 1, and rubber ring one 11 of the inner wall of sealing sleeve 10 is wrapped around the outer wall of vice sealing sleeve 14, thus achieving multiple installation sealing, after the connection of powder delivery pipe 1 and spray gun head 2 is completed, claw piece 5 is manually moved, and finally claw piece 5 is finally clamped on the bottom end surface of vice sealing sleeve 14, the connection of powder delivery pipe 1 and spray gun head 2 is completed, and after the fixation is completed, threaded cylinder 9 is manually rotated, threaded cylinder 9 is threaded on the outer surface of installation sliding cylinder 3, and the fixation of installation sliding cylinder 3 is completed.

[0028] Referring to Figure 3The reinforcing assembly is arranged on the outer wall of the threaded cylinder 9, and comprises an L-shaped plate 18 on the outer wall of the threaded cylinder 9, a reinforcing pull rod 19 penetrating through the L-shaped plate 18 and the threaded cylinder 9, a reinforcing hole 20 corresponding to the reinforcing pull rod 19 arranged on the outer surface of the mounting sliding cylinder 3, a compression spring 21 fixed on the inner side wall of the L-shaped plate 18, the compression spring 21 being sleeved on the outer surface of the reinforcing pull rod 19, and the other end of the compression spring 21 being fixed on the outer wall of the reinforcing pull rod 19, and the claw piece 5 is finally clamped on the bottom end surface of the secondary sealing sleeve 14, and the fixing after the connection of the powder conveying pipe 1 and the spray gun head 2 is completed, after the fixing is completed, the reinforcing pull rod 19 is aligned with the reinforcing hole 20, the compression spring 21 is reset and elongated, the end of the reinforcing pull rod 19 is inserted into the reinforcing hole 20, and the fixing of the mounting sliding cylinder 3 is further completed.

[0029] Referring to Figure 1 and Figure 4 , the powder conveying pipe 1 is further connected with a gas conveying pipe, the gas conveying pipe is connected and communicated with the gas inlet, and the bottom of the spray gun head 2 is provided with an ejection hole, the powder is combined with the powder conveying pipe 1 and the gas conveying pipe to accelerate the ejection of the powder, and the effective speed-up effect is achieved.

[0030] In specific work, the connection relationship that the sealing element and the secondary sealing element are sleeved with each other is utilized to ensure the sealing property of the connection between the powder conveying pipe 1 and the spray gun head 2 after installation, and the stability of the PFA powder ejection work is ensured, after the powder conveying pipe 1 and the spray gun head 2 are mutually docked, the mounting sliding cylinder 3 is manually rotated by a person, so as to drive the hinged block 7 connected with the connecting rod 8 to move linearly downward, the claw piece 5 indirectly connected with the hinged block 7 is linked on the outer surface of the powder conveying pipe 1, therefore, when the hinged block 7 moves downward, the claw piece 5 is driven to be in the clamping state or the mutually opened state, the claw piece 5 is finally clamped on the bottom end surface of the secondary sealing element of the spray gun head 2, and the fixing after the connection of the powder conveying pipe 1 and the spray gun head 2 is completed. The application has the advantages of simple design, convenient replacement of the gun head, high sealing property of the gun head after disassembly and installation, ensured sealing stability of the connection between the powder conveying pipe 1 and the spray gun head 2, and increased use effect of the PFA powder spray gun.

[0031] Although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments which can be understood by those skilled in the art.

Claims

1. A PFA powder spray gun with a gun head that is easily replaceable, characterized in that: The utility model provides a powder conveying pipe (1) and a spray gun head (2) are included, the sealing piece is equipped on the powder conveying pipe (1), the vice sealing piece is equipped on the spray gun head (2), the sealing piece and the vice sealing piece are mutually nested, the installation slide cylinder (3) is slidably arranged on the powder conveying pipe (1), the setting space (4) is set up in the bottom of installation slide cylinder (3), a plurality of claw assemblies are arranged in the setting space (4), the claw assembly includes claw piece (5), the top one side of claw piece (5) is hinged and is arranged on the outer surface of powder conveying pipe (1), the other side of claw piece (5) top is hinged and is equipped with articulated rod (6), articulated rod (6) top is hinged and is equipped with articulated block (7), articulated block (7) and setting space (4) are fixedly connected through connecting rod (8), the outer surface of powder conveying pipe (1) is also equipped with the fixed piece of fixed installation slide cylinder (3), the powder conveying pipe (1) is also connected with gas conveying pipe, the gas conveying pipe is connected with gas inlet and communicates, the spray gun head (2) bottom has the ejection hole.

2. A PFA powder spray gun with a gun head for easy replacement as claimed in claim 1 wherein: The fixed piece includes a threaded sleeve (9) that is threaded onto the outer surface of the powder conveying pipe (1), and the inner wall of the threaded sleeve (9) is threaded onto the outer surface of the installation slide cylinder (3).

3. A PFA powder spray gun with a gun head for easy replacement as claimed in claim 2 wherein: A plurality of positioning sliding grooves (16) are formed on the outer wall of the powder conveying pipe (1), and a positioning sliding rod (17) is fixedly arranged on the inner side wall of the installation slide cylinder (3) and extends into the positioning sliding groove (16).

4. A PFA powder spray gun with a gun head for easy replacement as claimed in claim 3 wherein: The inner bottom of the powder conveying pipe (1) is provided with a stepped groove (12), and the inner wall of the stepped groove (12) is pasted with a rubber ring (13).

5. A PFA powder spray gun with a gun head for easy replacement as claimed in claim 4 wherein: The vice sealing piece includes a vice sealing sleeve (14) fixedly arranged on the spray gun head (2), and a rubber ring (15) is pasted on the inner wall of the vice sealing sleeve (14).

6. A PFA powder spray gun with a gun head for easy replacement as claimed in claim 5 wherein: A reinforcing assembly is fixedly arranged on the outer wall of the threaded sleeve (9), the reinforcing assembly includes an L-shaped plate (18) on the outer wall of the threaded sleeve (9), a reinforcing pull rod (19) is arranged through the L-shaped plate (18) and the threaded sleeve (9), and a reinforcing hole (20) corresponding to the reinforcing pull rod (19) is formed on the outer surface of the installation slide cylinder (3).

7. A PFA powder spray gun with a gun head for easy replacement as claimed in claim 6 wherein: A compression spring (21) is fixedly arranged on the inner side wall of the L-shaped plate (18), the compression spring (21) is sleeved on the outer surface of the reinforcing pull rod (19), and the other end of the compression spring (21) is fixed on the outer wall of the reinforcing pull rod (19).

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