A post-mix water sandblasting gun

Abstract

The invention discloses a post-mixing water sandblasting gun, comprising a water inlet pipe, a sand inlet pipe, a sand mixing piece, a sand mixer, a driving mechanism and a casing; a sand mixing chamber is provided in the sand mixing piece; a flow channel is provided in the sand mixer; the water inlet pipe, the sand inlet pipe and the flow channel are respectively connected with the sand mixing chamber; the sand mixing piece is arranged in the casing and relatively fixed to the casing; the sand mixer is rotatably connected to the sand mixing piece; the driving mechanism is connected to the casing and is suitable for driving the sand mixer to rotate around its own axis, and the outlet of the flow channel is eccentrically arranged on the axis of the sand mixer. The post-mixing water sandblasting gun of the invention has a large striking surface and can effectively improve the cleaning efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of high-pressure water jet cleaning equipment, in particular to a post-mix water sandblasting spray gun. Background Art

[0002] High-pressure water jet cleaning technology uses a power pressurizing device to pressurize water, spraying it out at high speed, using the high-speed kinetic energy of water and combining it with abrasives to achieve a cleaning effect. It has the characteristics of high efficiency and significant effect on surfaces with strong adhesion and extremely difficult to clean, which is incomparable to ordinary manual cleaning. In addition, this cleaning method is dust-free throughout the process and has extremely low cost. It is recognized as one of the most scientific, economical and environmentally friendly cleaning methods.

[0003] The existing water sandblasting guns have a circular or rectangular nozzle. The rectangular nozzle can form a fan-shaped jet shape with greater striking force, but its striking surface is limited, which greatly restricts the cleaning efficiency and increases the cleaning cost. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a post-mix water sandblasting gun, which has a large impact surface and can effectively improve the cleaning efficiency.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] A post-mixing water sandblasting gun comprises: a water inlet pipe, a sand inlet pipe, a sand mixing piece, a sand mixer, a driving mechanism and a casing; a sand mixing chamber is provided in the sand mixing piece; a flow channel is provided in the sand mixer; the water inlet pipe, the sand inlet pipe and the flow channel are respectively connected to the sand mixing chamber; the sand mixing piece is arranged in the casing and relatively fixed to the casing; the sand mixer is rotatably connected to the sand mixing piece; the driving mechanism is connected to the casing and is suitable for driving the sand mixer to rotate around its own axis, and the outlet of the flow channel is eccentrically arranged on the axis of the sand mixer.

[0007] Furthermore, the center line of the flow channel is parallel to and does not overlap with the axis of the sand mixer.

[0008] Furthermore, the center line of the flow channel is arranged obliquely to the axis line of the sand mixer.

[0009] Furthermore, a connecting piece is provided between the water inlet pipe and the sand mixing piece, and two ends of the connecting piece are respectively threadedly connected to the water inlet pipe and the sand mixing piece.

[0010] Furthermore, one end of the connecting piece connected to the water inlet pipe is provided with an internal thread, and one end of the connecting piece connected to the sand mixing piece is provided with an external thread.

[0011] Furthermore, the sand inlet pipe is threadedly connected to the sand mixing piece.

[0012] Furthermore, the inlet of the flow channel is conical, the sand inlet pipe is obliquely arranged on the sand mixing piece, the outlet of the sand inlet pipe is aligned with the inlet of the flow channel, and the outlet direction of the sand inlet pipe is parallel to the generatrix at the top of the inlet of the flow channel.

[0013] Furthermore, a nozzle is provided between the water inlet pipe and the sand mixing chamber, the water inlet end of the nozzle is communicated with the water inlet pipe, and the water outlet end of the nozzle is located in the sand mixing chamber; the nozzle is threadedly connected to the connecting piece.

[0014] Furthermore, a mounting hole is provided at one end of the sand mixing piece close to the sand mixer; an end of the sand mixing piece away from the outlet of the flow channel is the mounting end, and an end of the sand mixing piece close to the outlet of the flow channel is the working end; the diameter of the mounting end is larger than the diameter of the working end; the mounting end is installed in the mounting hole, and a first sealing ring is provided between the mounting end and the mounting hole; a pressure cover is also provided at one end of the sand mixing piece close to the sand mixer, and the pressure cover includes a connecting sleeve and a limit stop ring; the connecting sleeve is threadedly connected to the outside of the mounting end, and a second sealing ring is provided between the mounting end and the connecting sleeve; a through hole is provided on the limit stop ring, and the diameter of the through hole is larger than the diameter of the working end and smaller than the diameter of the mounting end, so as to axially limit the mounting end between the limit stop ring and the bottom of the mounting hole.

[0015] Furthermore, the driving mechanism is a motor, a driving gear is provided on the output shaft of the motor, a driven gear is provided on the sand mixer, and the driving gear is suitable for meshing with the driven gear; a driving gear cavity, a driven gear cavity and a motor cavity are provided in the casing; the driving gear is located in the driving gear cavity, and the driven gear is located in the driven gear cavity; the motor is located in the motor cavity, and a third sealing ring is provided between the motor and the casing.

[0016] Compared with the prior art, the beneficial effect of the present invention is that the sand mixer can be rotatably connected to the sand mixing piece, and the outlet of the sand mixer flow channel is eccentrically arranged on the axis of the sand mixer. In this way, when the sand mixer rotates, the area covered by the outlet of the flow channel is much larger than the area covered by the fixed nozzle in the prior art, that is, the post-mixing water sandblasting gun of the present invention can clean a larger area per unit time, which can effectively improve the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a post-mix water-based sandblasting gun of the present invention;

[0018] Figure 2 This is an exploded view of the post-mix water sandblasting gun of the present invention after a portion of the casing is removed;

[0019] Figure 3 A three-dimensional diagram of the sand mixing unit of the present invention;

[0020] Figure 4 is a three-dimensional diagram of the sand mixer of the present invention;

[0021] Figure 5 A three-dimensional diagram of the gland of the present invention;

[0022] Figure 6 It is a cross-sectional view of the post-mix water sandblasting gun of the present invention;

[0023] Figure 7 for Figure 6 Partial schematic diagram.

[0024] In the figure: 1. water inlet pipe; 2. sand inlet pipe; 3. sand mixing piece; 31. sand mixing chamber; 32. mounting hole; 4. sand mixer; 41. flow channel; 42. mounting end; 43. working end; 44. first sealing ring; 45. second sealing ring; 46. driven gear; 5. housing; 6. motor; 61. driving gear; 7. connecting piece; 71. internal thread; 72. external thread; 8. nozzle; 9. gland; 91. connecting sleeve; 92. limit stop ring; 921. through hole. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present invention are provided in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] like Figure 1-6As shown, a post-mixing water sandblasting gun provided by an embodiment of the present invention is shown, which at least includes a water inlet pipe 1, a sand inlet pipe 2, a sand mixing piece 3, a sand mixer 4, a driving mechanism and a housing 5; a sand mixing chamber 31 is provided in the sand mixing piece 3; a flow channel 41 is provided in the sand mixer 4; the water inlet pipe 1, the sand inlet pipe 2 and the flow channel 41 are respectively connected to the sand mixing chamber 31; the sand mixing piece 3 is arranged on the housing 5 and relatively fixed to the housing 5; the sand mixer 4 is rotatably connected to the sand mixing piece 3; the driving mechanism is connected to the housing 5 and is suitable for driving the sand mixer 4 to rotate around its own axis, and the outlet of the flow channel 41 is eccentrically arranged on the axis of the sand mixer 4. The outlet of the flow channel 41 can be rectangular to form a fan-shaped jet shape to ensure the striking force.

[0029] Specifically, the outlet of the flow channel 41 is eccentrically arranged on the axis of the sand mixer 4 in the following two ways: 1. The center line of the flow channel 41 is parallel to and does not overlap with the axis of the sand mixer 4 (not shown). 2. The center line of the flow channel 41 is inclined to the axis of the sand mixer 4 (see Figure 6 ). It should be noted that the second method is adopted to realize that the outlet of the flow channel 41 is eccentrically arranged on the axis of the sand mixer 4, which can save space. The reason is as follows: when the outlet size of the flow channel 41 remains unchanged, the inclined arrangement of the flow channel 41 can make the sand mixer 4 have a smaller volume.

[0030] In the above-mentioned arrangement, the water inlet pipe 1 is used to introduce high-pressure water, and the sand inlet pipe 2 is used to introduce sand. The sand and water are mixed in the sand mixing chamber 31 and then enter the flow channel 41, and are finally ejected from the outlet of the flow channel 41. In addition, since the sand mixer 4 is rotatably connected to the sand mixing part 3, and the outlet of the flow channel 41 of the sand mixer 4 is eccentrically arranged on the axis of the sand mixer 4, when the driving mechanism drives the sand mixer 4 to rotate, the area covered by the outlet of the flow channel 41 is much larger than the area covered by the fixed nozzle in the prior art, that is, the post-mixing water sandblasting gun of the present invention has a larger cleaning area per unit time, which can effectively improve the cleaning efficiency. For a clearer explanation, refer to Figure 7 In the figure, C1 is the axis of the sand mixer 4, C2 is the center line of the flow channel 41, P is the eccentric distance, and L is the length of the flow channel 41. Now, assuming that the width of the flow channel 41 is d, then when the sand mixer 4 does not rotate, its single blow efficiency η1=L*d, and when the sand mixer 4 rotates, its single blow efficiency Efficiency ratio That is, the cleaning efficiency can be effectively improved by adopting the present invention.

[0031] As a preferred embodiment, a connector 7 is provided between the water inlet pipe 1 and the sand mixing piece 3, and the two ends of the connector 7 are respectively threadedly connected to the water inlet pipe 1 and the sand mixing piece 3. Through such a setting, the disassembly and assembly between the water inlet pipe 1 and the sand mixing piece 3 can be facilitated, thereby facilitating the replacement and maintenance of parts. Specifically, the end of the connector 7 connected to the water inlet pipe 1 is provided with an internal thread 71, and the end of the connector 7 connected to the sand mixing piece 3 is provided with an external thread 72, that is, the connector 7 is threadedly connected to the water inlet pipe 1 through the internal thread 71 of the connector 7, and the connector 7 is threadedly connected to the sand mixing piece 3 through the external thread 72 of the connector 7.

[0032] Preferably, the sand inlet pipe 2 is threadedly connected to the sand mixing member 3. Through such an arrangement, the sand inlet pipe 2 can be easily disassembled and assembled, thereby facilitating maintenance.

[0033] Preferably, the inlet of the flow channel 41 is conical, the sand inlet pipe 2 is tiltedly arranged on the sand mixing unit 3, the outlet of the sand inlet pipe 2 is aligned with the inlet of the flow channel 41, and the outlet direction of the sand inlet pipe 2 is parallel to the generatrix at the top of the inlet of the flow channel 41. In this way, the sand coming in from the sand inlet pipe 2 can enter the inlet of the flow channel 41 more smoothly, and at the same time, it is convenient for the sand and water to generate a turbulent state in the sand mixing chamber 31, so that the sand and water are mixed more evenly, ensuring the cleaning effect.

[0034] Preferably, a nozzle 8 is provided between the water inlet pipe 1 and the sand mixing chamber 31, the water inlet end of the nozzle 8 is connected to the water inlet pipe 1, and the water outlet end of the nozzle 8 is located in the sand mixing chamber 31; the nozzle 8 is threadedly connected to the connector 7. The nozzle 8 can generate a high-speed jet, further ensuring the mixing effect of the sand and the water flow, and the high-speed jet can also enhance the cleaning effect.

[0035] Preferably, a mounting hole 32 is provided at one end of the sand mixing member 3 close to the sand mixer 4; an end of the sand mixer 4 far from the outlet of the flow channel 41 is a mounting end 42, and an end of the sand mixer 4 close to the outlet of the flow channel 41 is a working end 43; the diameter of the mounting end 42 is larger than the diameter of the working end 43; the mounting end 42 is installed in the mounting hole 32, and a first sealing ring 44 is provided between the mounting end 42 and the mounting hole 32. Specifically, a mounting groove can be provided on the mounting end 42, and the first sealing ring 44 is provided at the mounting end 42. The sand mixing part 3 is provided with a gland 9 at one end close to the sand mixer 4, and the gland 9 includes a connecting sleeve 91 and a limiting retaining ring 92; the connecting sleeve 91 is threadedly connected to the outside of the mounting end 42, and a second sealing ring 45 is provided between the mounting end 42 and the connecting sleeve 91; a through hole 921 is provided on the limiting retaining ring 92, and the diameter of the through hole 921 is larger than the diameter of the working end 43 and smaller than the diameter of the mounting end 42, so as to limit the mounting end 42 axially between the limiting retaining ring 92 and the bottom of the mounting hole 32. The sealing effect of the first sealing ring 44 and the second sealing ring 45 can prevent water from leaking from the housing 5, thereby ensuring the reliability of the use of the post-mixing water spray gun of the present invention.

[0036] Preferably, the driving mechanism is a motor 6, a driving gear 61 is provided on the output shaft of the motor 6, a driven gear 46 is provided on the sand mixer 4, and the driving gear 61 is suitable for meshing with the driven gear 46. Specifically, the output shaft of the motor 6 and the driving gear 61 can be connected in a "D" shape, and the sand mixer 4 and the driven gear 46 can also be connected in a "D" shape. The housing 5 is provided with a driving gear 61 cavity, a driven gear 46 cavity and a motor 6 cavity; the driving gear 61 is located in the driving gear 61 cavity, and the driven gear 46 is located in the driven gear 46 cavity; the motor 6 is located in the motor 6 cavity, and a third sealing ring (not shown) is provided between the motor 6 and the housing 5. By providing the third sealing ring, it is possible to prevent water from leaking into the motor 6 cavity and damaging the motor 6.

[0037] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A post-mix water sandblasting gun, characterized in that: include: A water inlet pipe, a sand inlet pipe, a sand mixing unit, a sand mixer, a driving mechanism and a casing; a sand mixing chamber is provided in the sand mixing unit; A flow channel is provided in the sand mixer; the water inlet pipe, the sand inlet pipe and the flow channel are respectively connected to the sand mixing chamber; the sand mixing piece is arranged on the housing and relatively fixed to the housing; the sand mixer is rotatably connected to the sand mixing piece; The driving mechanism is connected to the housing and is suitable for driving the sand mixer to rotate around its own axis. The outlet of the flow channel is eccentrically arranged on the axis of the sand mixer.

2. The post-mix water sandblasting gun according to claim 1, characterized in that: The center line of the flow channel is parallel to and does not coincide with the axis of the sand mixer.

3. The post-mix water sandblasting gun according to claim 1, characterized in that: The center line of the flow channel is arranged obliquely to the axis line of the sand mixer.

4. The post-mix water sandblasting gun according to any one of claims 1 to 3, characterized in that: A connecting piece is arranged between the water inlet pipe and the sand mixing piece, and two ends of the connecting piece are respectively threadedly connected to the water inlet pipe and the sand mixing piece.

5. The post-mix water sandblasting gun according to claim 4, characterized in that: One end of the connecting piece connected to the water inlet pipe is provided with an internal thread, and one end of the connecting piece connected to the sand mixing piece is provided with an external thread.

6. The post-mix water sandblasting gun according to claim 1, characterized in that: The sand inlet pipe is threadedly connected to the sand mixing piece.

7. The post-mix water sandblasting gun according to claim 6, characterized in that: The inlet of the flow channel is conical, the sand inlet pipe is obliquely arranged on the sand mixing piece, the outlet of the sand inlet pipe is aligned with the inlet of the flow channel, and the outlet direction of the sand inlet pipe is parallel to the generatrix at the top of the inlet of the flow channel.

8. The post-mix water sandblasting gun according to claim 5, characterized in that: A nozzle is arranged between the water inlet pipe and the sand mixing chamber, the water inlet end of the nozzle is communicated with the water inlet pipe, and the water outlet end of the nozzle is located in the sand mixing chamber; the nozzle is threadedly connected to the connecting piece.

9. The post-mix water sandblasting gun according to claim 1, characterized in that: A mounting hole is provided at one end of the sand mixing piece close to the sand mixer; an end of the sand mixing piece away from the outlet of the flow channel is the mounting end, and an end of the sand mixing piece close to the outlet of the flow channel is the working end; the diameter of the mounting end is larger than the diameter of the working end; the mounting end is installed in the mounting hole, and a first sealing ring is provided between the mounting end and the mounting hole; a pressure cover is also provided at one end of the sand mixing piece close to the sand mixer, and the pressure cover includes a connecting sleeve and a limit stop ring; the connecting sleeve is threadedly connected to the outside of the mounting end, and a second sealing ring is provided between the mounting end and the connecting sleeve; a through hole is provided on the limit stop ring, and the diameter of the through hole is larger than the diameter of the working end and smaller than the diameter of the mounting end, so as to axially limit the mounting end between the limit stop ring and the bottom of the mounting hole.

10. The post-mix water sandblasting gun according to claim 1, characterized in that: The driving mechanism is a motor, the output shaft of the motor is provided with a driving gear, the sand mixer is provided with a driven gear, and the driving gear is suitable for meshing with the driven gear; The housing is provided with a driving gear cavity, a driven gear cavity and a motor cavity; The driving gear is located in the driving gear cavity, and the driven gear is located in the driven gear cavity; The motor is located in the motor cavity, and a third sealing ring is arranged between the motor and the housing.

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