Continuous spray gun

Abstract

A continuous spray gun comprises a main body, an outer cover, a wrench and a head cap, a piston is arranged in the main body, a cylinder body allowing the piston to move back and forth is formed at the front end of the main body, a liquid storage cavity is formed in the cylinder body, a liquid outlet channel is formed in the upper end of the main body and behind a nozzle, a water storage piston is arranged in the liquid outlet channel, and a valve seat is arranged at the lower end of the main body in a butt joint mode. The upper end of the liquid inlet channel is provided with a one-way valve, the liquid inlet channel is communicated with the liquid storage cavity and the liquid outlet channel through the one-way valve, the lower end of the valve seat is provided with two water inlets, the lower end of the lower water inlet is connected with a suction pipe, and the upper end of the lower water inlet is communicated with the liquid inlet channel. And a marble for closing the inverted water inlet channel in an upright state and opening the channel in an inverted state is arranged in the inverted water inlet channel. The liquid spraying head is reasonable in structure and good in spraying effect, continuous spraying can be achieved in the vertical state and the inverted state, and a certain pressure value exists at the tail end of the liquid spraying head cap.

Description

Technical Field

[0001] This utility model relates to a spray gun, specifically a continuous plastic spray gun. Background Technology

[0002] A liquid spray gun is a device that uses the rapid release of liquid or compressed air as its power source. It is widely used in household chemical cleaners, car protective products, gardening products, pet care products, and furniture polishing products, bringing convenience and speed to users. The working principle of a spray gun is that the reciprocating motion of a trigger increases the air pressure inside the spray bottle, causing the liquid inside to spray out. After the liquid is sprayed out, the trigger automatically returns to its original position under the action of a spring. Traditional spray guns often have high initial pressure, but insufficient pressure at the very end to maintain a continuous spray. Additionally, because the straw is inserted at the bottom of the bottle, the spray gun can spray when upright, but cannot achieve continuous spraying when upside down.

[0003] An investigation revealed that Chinese patent CN202122720634.2, entitled "A Spray Gun," includes a main body, an outer cover, a wrench, a cap, and a screw ring. The cap has a nozzle at its front end, and the main body contains a piston. The wrench is located at the front end of the main body, below the nozzle, and drives the piston to move. The key feature is that the front end of the main body has a cylinder for the piston to move back and forth, forming a liquid storage chamber. The main body has an inlet channel and an outlet channel. A ball valve is located in the inlet channel, connecting it to the liquid storage chamber. A one-way valve is located inside the main body, above the ball valve, connecting the cylinder to the outlet channel. The one-way valve allows for instantaneous stopping of spraying after most of the liquid has been sprayed. This spray gun maintains a certain pressure at the very end of the cap, but it can only spray in an upright position and cannot spray continuously in an inverted position. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a reasonably structured, high-performance all-plastic continuous spray gun that can continuously spray in both upright and inverted states, in light of the above-mentioned technical situation.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a continuous spray gun, including a main body, an outer cover, a wrench, a cap, and a screw ring. The front end of the cap is provided with a nozzle, and the main body is provided with a piston. The wrench is set at the front end of the main body and below the nozzle. The piston is driven to move by the wrench. The main body is characterized by having a cylinder formed at the front end for the piston to move back and forth. A liquid storage chamber is formed in the cylinder. A liquid outlet channel is provided at the upper end of the main body and behind the nozzle. A water storage piston is provided in the liquid outlet channel. A valve seat is fitted at the lower end of the main body. A liquid inlet channel and an inverted liquid inlet channel are provided in the valve seat. A one-way valve is provided at the upper end of the liquid inlet channel. The liquid inlet channel is connected to the liquid storage chamber and the liquid outlet channel respectively through the one-way valve. Two water inlets are provided at the lower end of the valve seat. The lower end of the lower water inlet is connected to a suction tube and the upper end is connected to the liquid inlet channel. The upper water inlet is connected to the lower water inlet through the inverted liquid inlet channel. A ball is provided in the inverted liquid inlet channel to close the channel when it is upright and open the channel when it is inverted.

[0006] Furthermore, the valve seat includes a circular plate with a circular cylinder protruding from it. The lower end of the main body has a connecting cylinder that connects to the valve seat. The connecting cylinder includes an outer cylinder and an inner cylinder, and an annular groove is formed between the outer cylinder and the inner cylinder for the circular cylinder to be inserted and positioned. The valve seat is inserted into the annular groove through the circular cylinder and is engaged and connected to the lower end of the main body. A cylinder with an inlet channel is vertically protruding from the upper left side of the circular plate. A cavity with the upper end of the cylinder is vertically recessed at the lower end of the main body. A one-way valve is disposed in the cavity. An outlet is provided in the cavity and above the one-way valve, which are connected to the outlet channel and the liquid storage chamber, respectively.

[0007] Furthermore, the circular plate of the valve seat has a protruding insertion section below it, which serves as the lower water inlet for connecting with the suction pipe. The circular plate has two openings, one on the left and one on the right, corresponding to the position of the lower water inlet. The left opening is connected to the liquid inlet channel, and the right opening is connected to the inverted water inlet channel. An upper water inlet is provided on the right side of the upper and lower water inlets on the circular plate. A water storage cavity is formed inside the valve seat and above the upper water inlet. The upper end of the water storage cavity has a hole that connects to the inverted water inlet channel.

[0008] Furthermore, the liquid outlet channel is opened laterally inside the main body and located above the cylinder. A nozzle cap is set on the upper front side of the main body and connected to the liquid outlet channel. A water storage piston is set inside the liquid outlet channel. A spring seat is provided at the rear end of the liquid outlet channel. A water storage spring is supported on the spring seat and the rear end of the water storage piston, so that the water storage piston has the tendency to move forward and close the outlet.

[0009] Preferably, the water storage piston is a hollow piston body.

[0010] Furthermore, the snap-fit ​​connection is achieved by having an annular protruding rib on the outer wall of the cylindrical tube and a corresponding annular concave rib on the inner wall of the outer tube, and by the cooperation of the annular protruding rib and the annular concave rib.

[0011] Furthermore, the cylinder is horizontally positioned at the front of the liquid inlet channel, and the piston is positioned within the cylinder in a way that allows it to move back and forth. The front end of the piston extends out of the cylinder and abuts against the wrench.

[0012] Furthermore, a screw ring is provided at the lower end of the main body, and the screw ring is fixed to the main body through a valve seat.

[0013] Finally, the outer cover covers the main body, and the front end of the outer cover is provided with an installation port for installing a wrench. The lower end of the outer cover abuts against the upper end of the screw ring.

[0014] Compared with the prior art, the advantages of this utility model are as follows: It is equipped with two water inlets, wherein the lower water inlet is connected to the suction tube and the upper end of the lower water inlet is connected to the liquid inlet channel. The upper water inlet is connected to the lower water inlet through an inverted water inlet channel. A ball is provided in the inverted water inlet channel. In the upright state, the ball closes the inverted water inlet channel. By pulling the lever, the liquid enters the liquid inlet channel through the suction tube from the lower water inlet and enters the liquid storage chamber. Then, the piston moves and presses the front end of the water storage piston. The increased pressure causes the water storage piston to retract, and some liquid is sprayed directly from the nozzle. The liquid that cannot be sprayed out in time stays at the front end of the water storage piston to wait, so that the spray gun forms a certain continuous spray. In the inverted state, the ball opens the inverted liquid inlet channel, and the liquid enters from the upper water inlet, and then enters the liquid storage chamber through the inverted liquid inlet channel and the liquid inlet channel, forming the same working state as the upright state. This utility model has a reasonable and compact structure, good spraying effect, and can achieve continuous spraying in both upright and inverted states. Moreover, there is a certain pressure value at the very end of the liquid spray head cap, which effectively avoids liquid leakage from the head cap opening after spraying. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model in an upright state;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model embodiment in an inverted state. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1 , 2As shown, a continuous plastic spray gun includes a main body 1, an outer cover 2, a wrench 3, a cap 4, and a screw ring 9. The cap 4 has a nozzle 40 at its front end. A piston 30 is located inside the main body 1. The wrench 3 is positioned at the front end of the main body 1, below the nozzle 40, and drives the piston 30 to move. A cylinder 12 is formed at the front end of the main body 1 to allow the piston 30 to move back and forth. A liquid storage chamber C is formed inside the cylinder 12. A liquid outlet channel B is located at the upper end of the main body 1, behind the nozzle 40. A water-retaining piston 5 is located inside the liquid outlet channel B. A valve seat 6 is fitted at the lower end of the main body 1. It has an inlet channel A and an inverted inlet channel D. The upper end of the inlet channel A is equipped with a one-way valve 7. The inlet channel A is connected to the storage chamber C and the outlet channel B through the one-way valve 7. The lower end of the valve seat 6 is equipped with two water inlets, namely the upper water inlet 64 and the lower water inlet 63. The lower end of the lower water inlet 63 is connected to the suction tube, and the upper end is connected to the inlet channel A. The upper water inlet 64 is connected to the lower water inlet 63 through the inverted inlet channel D. The inverted inlet channel D is equipped with a ball 8 that closes the channel when it is upright and opens the channel when it is inverted.

[0019] The specific structure is as follows: the valve seat 6 includes a circular plate 61, on which a circular cylinder 62 is protruding. The outer wall of the circular cylinder 62 is provided with annular ribs. The lower end of the main body 1 is provided with a connecting cylinder 11 connected to the valve seat 6. The connecting cylinder 11 includes an outer cylinder 11a and an inner cylinder 11b. The inner wall of the outer cylinder 11a is provided with corresponding annular concave ribs. The height of the inner cylinder 11b is less than that of the outer cylinder. An annular groove is formed between the outer cylinder 11a and the inner cylinder 11b for the circular cylinder 62 to be inserted and positioned. The valve seat 6 is connected by inserting the circular cylinder 62 into the annular groove and by engaging with the lower end of the main body 1 through the cooperation of the annular ribs and the annular concave ribs. The upper left side of the circular plate 61 is vertically provided with a cylinder with an inlet channel A. The lower end of the main body 1 is vertically recessed with a cavity 13 for the upper end of the cylinder to be inserted. A one-way valve 7 is provided in the cavity 13. The cavity 13 and the upper part of the one-way valve 7 are respectively provided with an outlet connected to the outlet channel B and the storage cavity C. The valve seat 6 has a protruding insertion section 65 on the lower part of the circular plate 61, which serves as the lower water inlet 63 for insertion into the suction tube. The circular plate 61 has two openings on the left and right corresponding to the position of the lower water inlet 63. The left opening 61a is connected to the liquid inlet channel A, and the right opening 61b is connected to the inverted water inlet channel D. The upper water inlet 64 is opened on the right side of the upper and lower water inlets 63 on the circular plate 61. A water storage cavity 66 is formed inside the valve seat 6 and above the upper water inlet 64. The upper end of the water storage cavity 66 has a hole 67 that is connected to the inverted water inlet channel D.

[0020] The liquid outlet channel B is horizontally opened inside the main body 1, located above the cylinder. A cap 4 with a nozzle 40 is set on the upper front side of the main body 1 and connected to the liquid outlet channel B. A water storage piston 5 is set inside the liquid outlet channel B. A spring seat 51 is set at the rear end of the liquid outlet channel B. A water storage spring 50 is supported on the spring seat 51 and the rear end of the water storage piston 5, so that the water storage piston 5 has a tendency to move forward and close the outlet. The cylinder 12 is horizontally set in front of the liquid inlet channel A. The piston 30 is movably limited and set inside the cylinder 12. The front end of the piston 30 extends out of the cylinder 12 and abuts against the wrench 3. A screw ring 9 is set at the lower end of the main body 1 and is fixed to the main body 1 by a valve seat 6. An outer cover 2 covers the outside of the main body 1. The front end of the outer cover 2 has an installation port for the wrench 3 to be installed. The lower end of the outer cover 2 abuts against the upper end of the screw ring 9.

[0021] The working principle is as follows:

[0022] Upright position, such as Figure 1 As shown, the marble 8 closes the inverted water inlet channel D. By pulling the lever 3, the liquid enters the liquid inlet channel A through the suction tube from the lower water inlet 63 and enters the liquid storage chamber C. Then, the piston 30 moves and presses the front end of the water storage piston 5. The increased pressure causes the water storage piston 5 to move backward. Some of the liquid is sprayed directly from the nozzle 40. The liquid that cannot be sprayed out stays at the front end of the water storage piston 5 and waits, so that the spray gun forms a certain continuous spray until the water storage piston 5 closes the outlet again.

[0023] In an inverted position, such as Figure 2 As shown, because the buoyancy ball 8 opens the inverted liquid inlet channel D, the liquid enters from the upper water inlet 64, and then enters the liquid storage chamber C through the inverted liquid inlet channel D and the liquid inlet channel A, forming the same working state as the upright state.

[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A continuous spray gun, comprising a body, an outer cover, a wrench, a cap, and a screw ring, wherein a nozzle is provided at the front end of the cap, a piston is provided inside the body, and the wrench is disposed at the front end of the body and below the nozzle, and the piston is moved by the wrench, characterized in that: The front end of the main body is formed with a cylinder for the piston to move back and forth. A liquid storage chamber is formed inside the cylinder. A liquid outlet channel is provided at the upper end of the main body and behind the nozzle. A water storage piston is provided in the liquid outlet channel. A valve seat is fitted at the lower end of the main body. A liquid inlet channel and an inverted liquid inlet channel are provided in the valve seat. A one-way valve is provided at the upper end of the liquid inlet channel. The liquid inlet channel is connected to the liquid storage chamber and the liquid outlet channel through the one-way valve. Two water inlets are provided at the lower end of the valve seat. The lower end of the lower water inlet is connected to a suction tube and the upper end is connected to the liquid inlet channel. The upper water inlet is connected to the lower water inlet through the inverted liquid inlet channel. A ball is provided in the inverted water inlet channel to close the channel when it is upright and open the channel when it is inverted.

2. The continuous spray gun according to claim 1, characterized in that: The valve seat includes a circular plate with a circular cylinder protruding from it. The lower end of the main body has a connecting cylinder that connects to the valve seat. The connecting cylinder includes an outer cylinder and an inner cylinder. An annular groove is formed between the outer cylinder and the inner cylinder for the circular cylinder to be inserted and positioned. The valve seat is inserted into the annular groove through the circular cylinder and is engaged and connected to the lower end of the main body. A cylinder with a liquid inlet channel is vertically protruding from the upper left side of the circular plate. A cavity with the upper end of the cylinder is vertically recessed at the lower end of the main body. A one-way valve is set in the cavity. An outlet is provided in the cavity and above the one-way valve, which are connected to the liquid outlet channel and the liquid storage cavity, respectively.

3. The continuous spray gun according to claim 2, characterized in that: The circular plate of the valve seat has a protruding insertion section below it, which serves as the lower water inlet and is connected to the suction pipe. The circular plate has two openings on the left and right sides corresponding to the position of the lower water inlet. The left opening is connected to the liquid inlet channel, and the right opening is connected to the inverted water inlet channel. The upper water inlet is opened on the right side of the upper and lower water inlets on the circular plate. A water storage cavity is formed inside the valve seat and above the upper water inlet. The upper end of the water storage cavity has a hole that is connected to the inverted water inlet channel.

4. The continuous spray gun according to claim 3, characterized in that: The liquid outlet channel is opened horizontally inside the main body and located above the cylinder. A nozzle cap is set on the upper front side of the main body and connected to the liquid outlet channel. The water storage piston is set inside the liquid outlet channel. A spring seat is provided at the rear end of the liquid outlet channel. The water storage spring is supported on the spring seat and the rear end of the water storage piston, so that the water storage piston has the tendency to move forward and close the outlet.

5. The continuous spray gun according to claim 4, characterized in that: The water storage piston has a hollow piston body.

6. The continuous spray gun according to claim 4, characterized in that: The snap-fit ​​connection is achieved by having an annular protruding rib on the outer wall of the cylindrical tube and a corresponding annular concave rib on the inner wall of the outer tube, and by the cooperation of the annular protruding rib and the annular concave rib.

7. The continuous spray gun according to claim 6, characterized in that: The cylinder is horizontally positioned at the front of the liquid inlet channel, and the piston is positioned within the cylinder to be movable back and forth. The front end of the piston extends out of the cylinder and abuts against the wrench.

8. The continuous spray gun according to any one of claims 1 to 7, characterized in that: The lower end of the main body is provided with a screw ring, which is fixed to the main body by a valve seat.

9. The continuous spray gun according to any one of claims 1 to 7, characterized in that: The outer cover covers the main body, and the front end of the outer cover is provided with an installation port for installing a wrench. The lower end of the outer cover abuts against the upper end of the screw ring.

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