Quick-release spray gun for tunnel concrete spraying

Abstract

The utility model relates to the technical field of concrete spraying equipment, in particular to a quick-release spray gun for tunnel concrete spraying, which comprises a spray gun, a first connector arranged on the spray gun and a connecting piece connected with a pipeline. The first connector is matched with the connecting piece to form a quick disassembly and assembly structure; the first connector comprises a tubular body; a notch is formed in one side of the tubular body; the connecting piece is assembled with the first connector along the notch; the connecting piece comprises an annular body, an elastic piece and a fixed seat; when the connecting piece and the first connector are assembled, the connecting piece keeps inclined relative to the tubular body, the elastic piece is clamped into the inner side of the tubular body along the notch, the fixing base makes contact with the inner wall of the tubular body and then rotates by 90 degrees clockwise or anticlockwise, and installation is completed. According to the utility model, the original structures of the first connector and the connecting piece are innovatively improved, and the installation can be completed only by aligning and rotating during installation, so that the portability of installation and disassembly is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shotcrete equipment, in particular to a quick-disassembly spray gun for tunnel shotcrete. Background Technique

[0002] A wet shotcreting machine is a special equipment for spraying concrete, mortar or other liquid materials, and it has a wide range of applications in the fields of construction engineering, tunnel engineering, mine engineering, etc. A wet shotcreting machine usually consists of a spray gun, a pressure pump, a main exhaust fan, a scraper conveyor, an atomization device, a pipeline, a spray bar and other parts. It uses the working principle of hydraulic pumping. Through the thrust generated by the hydraulic pump, the liquid material is transported from the pressure pump to the spray gun, and then the material is sprayed onto the surface to be coated through air pressure.

[0003] The working principle of the wet shotcreting machine mainly includes two aspects: one is the principle of water mist cooling, adsorption and sedimentation. By atomizing water at the place where dust is generated, adsorbing dust onto water droplets, and then taking the water into the exhaust fan to be discharged, the purpose of reducing the dust concentration is achieved; the other is the working principle of hydraulic pumping. Using the thrust generated by the hydraulic pump, two oil cylinders reciprocate alternately, and the dense-flow material is sent from the conveying pipeline to the mixing pipe, and forms a dilute flow through compressed air and is sent to the nozzle through the pipeline. A certain proportion of accelerator is added at the nozzle and directly sprayed onto the sprayed surface.

[0004] In the prior art, the spray gun needs to be assembled on site at the construction site; and after use, the spray gun needs to be disassembled and cleaned; therefore, whether the spray gun is convenient to disassemble directly affects the experience during construction operations. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problems in the background technique, and propose a quick-disassembly spray gun for tunnel shotcrete. By innovatively improving the structures of the original first connector and the connecting piece, only alignment and rotation are required for installation during installation, greatly improving the portability of installation and disassembly.

[0006] The technical solution of the utility model, a quick-disassembly spray gun for tunnel shotcrete, includes a spray gun, a first connector arranged on the spray gun, and a connecting piece connected to the pipeline; the first connector and the connecting piece cooperate to form a quick disassembly and assembly structure;

[0007] The first connector includes a tubular body; a notch is arranged on one side of the tubular body; the connecting piece is assembled with the first connector along the notch;

[0008] The connecting piece includes an annular body, an elastic piece and a fixing seat; the elastic piece and the fixing seat are symmetrically arranged on both sides with the diameter of the annular body as the symmetry axis; the annular body is a hard metal ring, the bottom of the elastic piece is fixedly connected to the outer shell of the annular body, and the top is inserted into the annular body through a preset through hole; when the elastic piece is squeezed, the top of the elastic piece moves toward one side of the annular body through the through hole; the fixing seat is a cylindrical metal seat, an elastic ball is arranged at the end of the seat, and the elastic ball is retracted into the fixing seat under force;

[0009] When the connector is assembled with the first connector, the connector remains tilted relative to the tubular body, the elastic member is inserted into the inner side of the tubular body along the notch, the fixing seat contacts the inner wall of the tubular body, and then rotated 90° clockwise or counterclockwise to complete the installation.

[0010] In an optional embodiment, the first connector further includes an arc groove and a limit ring;

[0011] The limiting ring is arranged along the inner wall of the tubular body for half a circle and is arranged on a side close to the notch;

[0012] The arc-shaped groove is arranged along the inner wall of the tubular body for half a circle and is arranged toward a side away from the notch;

[0013] The limiting ring is provided with a positioning hole for installation with the elastic member; a vertical positioning groove is provided along the tubular body; the positioning groove is located directly above the arc groove and connected to the middle of the arc groove; the fixing seat first enters the positioning groove and then enters the arc groove.

[0014] In an optional embodiment, after the elastic member is inserted into the limiting ring through the positioning hole, it cooperates with the limiting ring to form a limiting structure.

[0015] In an optional embodiment, the depth of the positioning groove is greater than the depth of the arc groove.

[0016] In an optional embodiment, the spray gun further includes a base and a spray head; the base serves as a base for mounting the first connector and the spray head; the spray head is arranged in a conical shape, and its diameter gradually decreases toward the direction of discharging the material.

[0017] Preferably, a second connector is provided on the base, and the second connector is connected to the quick-setting agent storage tank through a pipeline.

[0018] Preferably, symmetrical handles are provided on the base in the direction in which the spray head is installed.

[0019] Compared with the prior art, the utility model has the following beneficial technical effects:

[0020] The utility model improves the structures of the original first connector and the connecting piece. During installation, it only needs to be aligned and then rotated to complete the installation, greatly improving the portability of installation and disassembly. After disassembly and cleaning, the inside of the spray gun is not easily blocked, which is beneficial to extending the service life of the spray gun. In addition, the utility model can also be compatible with various different models of spray guns, with a wider scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the whole embodiment of the utility model;

[0022] Figure 2 is a schematic structural diagram of the installation position of the second connector in the embodiment of the utility model;

[0023] Figure 3 is one of the schematic structural diagrams of the connecting piece in the embodiment of the utility model;

[0024] Figure 4 is the second of the schematic structural diagrams of the connecting piece in the embodiment of the utility model;

[0025] Figure 5 is one of the schematic structural diagrams of the first connector in the embodiment of the utility model;

[0026] Figure 6 is the second of the schematic structural diagrams of the first connector in the embodiment of the utility model;

[0027] Figure 7 is a top view of the first connector in the embodiment of the utility model.

[0028] Reference numerals: 1, spray gun; 11, base; 12, nozzle; 13, handle; 14, first connector; 141, tubular body; 142, notch; 143, positioning groove; 144, arc groove; 145, limiting ring; 146, positioning hole; 15, second connector; 2, connecting piece; 21, annular body; 22, elastic member; 23, through hole; 24, elastic ball; 25, fixed seat. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Embodiment 1

[0030] As Figure 1 shown, a quick-release spray gun for tunnel shotcrete proposed by the utility model includes a spray gun 1, a first connector 14 arranged on the spray gun 1, and a connecting piece 2 connected to a pipeline; the first connector 14 and the connecting piece 2 cooperate to form a quick-disassembly and assembly structure;

[0031] As Figure 5 shown, the first connector 14 includes a tubular body 141; a notch 142 is arranged on one side of the tubular body 141; the connecting piece 2 is assembled with the first connector 14 along the notch 142;

[0032] As shown Figure 3 in the figure, the connecting member 2 includes an annular body 21, an elastic member 22 and a fixing base 25; the elastic member 22 and the fixing base 25 are symmetrically arranged on both sides with the diameter of the annular body 21 as the axis of symmetry; the annular body 21 is a hard metal ring, preferably made of aluminum alloy; the bottom of the elastic member 22 is fixedly connected to the outer shell of the annular body 21, and the top is inserted into the annular body 21 through a preset through hole 23; when the elastic member 22 is squeezed, its top moves towards one side of the annular body 21 through the through hole 23, and when the pressure is eliminated, the elastic member 22 remains reset under the action of the elastic force; As shown Figure 4 in the figure, the fixing base 25 is a cylindrical metal base, and an elastic ball 24 is arranged at its end. The elastic ball 24 only moves within the fixing base 25. When the elastic ball 24 is stressed, it retracts into the fixing base 25. When the pressure is eliminated, the elastic ball 24 resets and protrudes relative to the fixing base 25;

[0033] In this embodiment, as shown Figure 7 in the figure, the first connector 14 further includes an arc-shaped groove 144 and a limiting ring 145; the limiting ring 145 is arranged along the inner wall of the tubular body 141 for half a circle, and is arranged on the side close to the notch 142; As shown Figure 5 in the figure, the arc-shaped groove 144 is arranged along the inner wall of the tubular body 141 for half a circle, and is arranged on the side away from the notch 142; As shown Figure 6 in the figure, a positioning hole 146 for installing the elastic member 22 is arranged on the limiting ring 145; a vertical positioning groove 143 is arranged along the tubular body 141; the positioning groove 143 is located directly above the arc-shaped groove 144 and is connected to the middle of the arc-shaped groove 144; the fixing base 25 first enters the positioning groove 143 and then enters the arc-shaped groove 144; after the elastic member 22 is clamped into the limiting ring 145 through the positioning hole 146, a limiting structure is formed in cooperation with the limiting ring 145; the depth of the positioning groove 143 is greater than the depth of the arc-shaped groove 144.

[0034] When the connecting member 2 needs to be assembled with the first connector 14, first keep the connecting member 2 inclined relative to the tubular body 141. Snap the elastic member 22 into the inner side of the tubular body 141 along the notch 142, and the elastic member 22 moves downward along the positioning hole 146 on the limiting ring 145 towards the lower part of the limiting ring 145. As the inclination angle of the connecting member 2 gradually decreases, the fixing seat 25 on the other side of the annular body 21 first snaps into the vertically arranged positioning groove 143, and the elastic ball 24 contracts towards the inside of the fixing seat 25 after being squeezed. As the connecting member 2 continues to move, the fixing seat 25 gradually enters the arc-shaped groove 144 along the positioning groove 143. Since the depth of the positioning groove 143 is greater than the depth of the arc-shaped groove 144, when the fixing seat 25 enters the arc-shaped groove 144, the elastic ball 24 on it contracts to the deepest position. Then rotate 90° clockwise or counterclockwise, and the elastic member 22 always slides relative to the bottom of the limiting ring 145 and remains limited. A sealing material can be provided on the outer periphery of the connecting member 2. When the connecting member 2 is connected to the first connector 14, a relatively sealed structure can be formed to prevent the concrete slurry from leaking from the interface when it is ejected after being configured. When disassembly is required, just rotate 90° counterclockwise or clockwise and withdraw the connecting member 2 from the notch 142.

[0035] The utility model can very conveniently connect the spray gun 1 with the connecting member 2, so that the concrete slurry in the storage tank can be conveyed through the pipeline to the spray gun 1 and sprayed by the spray gun 1 for construction.

[0036] Embodiment 2

[0037] As Figure 2 shown, the utility model discloses a quick-disassembly spray gun for tunnel shotcrete. Different from Embodiment 1, the spray gun 1 further includes a base 11 and a nozzle 12. The base 11 is used as a base body for installing the first connector 11 and the nozzle 12. The nozzle 12 is arranged in a conical shape, and its diameter gradually decreases towards the discharging direction. A second connector 15 is arranged on the base 11, and the second connector 15 is connected to the accelerator storage tank through a pipeline. Symmetrical handles 13 are arranged on the base 11 in the direction of installing the nozzle 12.

[0038] In this embodiment, the quick-disassembly structure described in Embodiment 1 is adopted, so that the spray gun 1 can realize the function of quick disassembly and assembly. This embodiment only provides a common form of the nozzle 12. Other types such as double-gun nozzles or multi-gun nozzles can realize the quick-disassembly function as long as the first connector 14 and the supporting connecting member 2 in Embodiment 1 are installed.

[0039] The embodiments of the utility model have been described in detail above with reference to the drawings. However, the utility model is not limited thereto. Various changes can be made without departing from the gist of the utility model within the knowledge scope of those skilled in the relevant art.

Claims

1. A quick-detachable spray gun for tunnel concrete spraying, characterized in that: It comprises a spray gun (1), a first connector (14) arranged on the spray gun (1), and a connector (2) connected to a pipeline; the first connector (14) cooperates with the connector (2) to form a quick disassembly structure; The first connector (14) comprises a tubular body (141); a notch (142) is provided on one side of the tubular body (141); the connector (2) is assembled with the first connector (14) along the notch (142); The connecting member (2) comprises an annular body (21), an elastic member (22) and a fixing seat (25); the elastic member (22) and the fixing seat (25) are symmetrically arranged on both sides with the diameter of the annular body (21) as a symmetry axis; When the connecting member (2) is assembled with the first connecting head (14), the connecting member (2) is kept inclined relative to the tubular body (141), the elastic member (22) is inserted into the inner side of the tubular body (141) along the notch (142), the fixing seat (25) contacts the inner wall of the tubular body (141), and then the connecting member (2) is rotated 90° clockwise or counterclockwise to complete the installation.

2. The quick-detachable spray gun for tunnel concrete spraying according to claim 1, characterized in that: The annular body (21) is a hard metal ring.

3. The quick-detachable spray gun for tunnel concrete spraying according to claim 2, characterized in that: The bottom of the elastic member (22) is fixedly connected to the outer shell of the annular body (21), and the top is inserted into the annular body (21) through a preset through hole (23); when the elastic member (22) is squeezed, the top moves toward one side of the annular body (21) through the through hole (23).

4. The quick-detachable spray gun for tunnel concrete spraying according to claim 2, characterized in that: The fixing seat (25) is a cylindrical metal seat, and an elastic ball (24) is arranged at the end thereof. The elastic ball (24) is retracted into the fixing seat (25) under force.

5. The quick-detachable spray gun for tunnel concrete spraying according to claim 4, characterized in that: The first connector (14) further comprises an arc-shaped groove (144) and a limiting ring (145); The limiting ring (145) is arranged along the inner wall of the tubular body (141) for half a circle and is arranged on a side close to the notch (142); The arc-shaped groove (144) is arranged along the inner wall of the tubular body (141) for half a circle and is arranged toward a side away from the notch (142); A positioning hole (146) for mounting with the elastic member (22) is provided on the limiting ring (145); a vertical positioning groove (143) is provided along the tubular body (141); the positioning groove (143) is located directly above the arc groove (144) and is connected to the middle of the arc groove (144); the fixing seat (25) first enters the positioning groove (143) and then enters the arc groove (144).

6. The quick-detachable spray gun for tunnel concrete spraying according to claim 5, characterized in that: After the elastic member (22) is inserted into the limiting ring (145) through the positioning hole (146), it cooperates with the limiting ring (145) to form a limiting structure.

7. The quick-detachable spray gun for tunnel concrete spraying according to claim 5, characterized in that: The depth of the positioning groove (143) is greater than the depth of the arc groove (144).

8. The quick-detachable spray gun for tunnel concrete spraying according to claim 1, characterized in that: The spray gun (1) further comprises a base (11) and a spray head (12); the base (11) is used as a base body for mounting the first connector (14) and the spray head (12); the spray head (12) is arranged in a conical shape, and its diameter gradually decreases in the direction of discharging the material.

9. The quick-detachable spray gun for tunnel concrete spraying according to claim 8, characterized in that: A second connector (15) is arranged on the base (11), and the second connector (15) is connected to the quick-setting agent storage tank through a pipeline.

10. The quick-detachable spray gun for tunnel concrete spraying according to claim 8, characterized in that: A symmetrical handle (13) is arranged on the base (11) in the direction of installation of the spray head (12).

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