Excavation head based on rotary water jet

Abstract

The utility model provides an excavation head based on rotary water jet, and relates to the field of vacuum excavation equipment, a material suction head fixes a material suction pipe, the material suction head is communicated with the material suction pipe, a high-pressure water gun is fixed with the material suction pipe, the output end of the high-pressure water gun is connected with a high-pressure rotary nozzle, and the high-pressure rotary nozzle comprises a nozzle mounting seat and a high-pressure rotary nozzle; the nozzle mounting seat is fixedly connected to the material suction head, and the high-pressure rotating nozzle is fixed to the nozzle mounting seat and faces the material suction opening; the high-pressure rotating nozzle comprises a nozzle shell fixed on the nozzle mounting seat, and an outlet for spraying water flow into the suction head is formed in the front end of the nozzle shell; the high-pressure rotating nozzle further comprises a rotating nozzle inner core arranged in the nozzle shell, the rotating nozzle inner core can rotate around the central axis of the high-pressure rotating nozzle under the action of water pressure, and the rotating track of the rotating nozzle inner core is conical. According to the utility model, single-point jet water flow breaking can be realized, the operation area is enlarged through rotation of the nozzle inner core during operation, and the nozzle has the advantages of strong impact force of single-point jet water flow and guarantee of the operation range of water jet.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum excavation equipment, in particular to an excavation head based on a rotating water jet. Background Art

[0002] The vacuum excavator is a new type of non-destructive excavation equipment. In the expansion of underground pipe networks in cities and towns, and the maintenance and renovation of underground pipelines, it can achieve precise positioning and excavate local ground; during the excavation process, the pipeline will not be damaged; it can also cross the pipeline and excavate downward to facilitate pipeline maintenance and renovation. It uses a high-pressure water gun to spray high-pressure water jets to cut, crush and compact the base layer, turning the soil into particles, block materials or muddy water; using a vacuum pump as a power source and pneumatic conveying technology, it sucks particles, block materials, muddy water and other pipeline coverings from the excavation head.

[0003] In the prior art, the patent application with the announcement number CN110565714A discloses "a vacuum excavation head", which discloses an excavation head that can integrate high-pressure water jet crushing function and vacuum suction function, realizes single-person operation, saves costs, and improves efficiency. However, in the relevant excavation and suction operations, it is found that although a high-pressure nozzle is installed on the suction excavation head to combine vacuum suction with high-pressure water crushing, this combination method can reduce the impact force dispersion of the water jet when crushing and sucking the ground of clay properties due to the multiple nozzles installed on the excavation head to achieve multi-point injection. If a single nozzle is installed for single-point injection, the water jet operation range is too small, which is not conducive to cutting, crushing and suctioning materials such as soil blocks. In both cases, the operation mode is not ideal and the efficiency needs to be improved.

[0004] Therefore, it is urgent to develop an excavation head structure that can avoid the dispersion of water jet impact force and ensure the operating range of the water jet. Utility Model Content

[0005] The utility model provides an excavation head based on a rotating water jet in view of the above problems existing in the prior art.

[0006] The utility model solves the above technical problems with the following technical solutions: an excavation head based on a rotating water jet, comprising a high-pressure water gun, a water pipe, a suction pipe, and a suction head, wherein the suction head is fixedly connected to the input end of the suction pipe, the suction port of the suction head faces downward and is connected to the inside of the suction pipe, the high-pressure water gun is fixedly connected to the suction pipe, and is characterized in that the output end of the high-pressure water gun is connected to a high-pressure rotating nozzle through a water pipe, and the high-pressure rotating nozzle comprises a nozzle mounting seat and a high-pressure rotating nozzle;

[0007] The nozzle mounting seat is fixedly connected to the suction head, the high-pressure rotary nozzle is fixed on the nozzle mounting seat and faces the suction port, and the intersection point between the central axis of the high-pressure rotary nozzle and the end face where the suction port is located is close to the center of the suction port;

[0008] The high-pressure rotary spray head comprises a spray head housing fixed on a spray head mounting seat, and a front end of the spray head housing has an outlet for supplying water flow to spray into a suction head;

[0009] The high-pressure rotary nozzle also includes a rotary nozzle inner core disposed in the nozzle housing, the front end of the rotary nozzle inner core having a water spray port for spraying a single columnar water flow, the front end of the rotary nozzle inner core is arranged at the outlet, the rotary nozzle inner core can rotate around the central axis of the high-pressure rotary nozzle under the action of water pressure, the rotation trajectory of the rotary nozzle inner core is conical, and the water spraying cone surface of the rotary nozzle inner core does not contact the inner wall of the suction head;

[0010] The nozzle mounting seat protrudes outward from the suction head, and a clearance cavity is arranged inside the nozzle mounting seat corresponding to the water spray cone surface of the rotating nozzle inner core, so that the water spray cone surface of the rotating nozzle inner core does not contact the inner wall of the nozzle mounting seat.

[0011] Furthermore, the nozzle mounting seat is installed on the side wall of the suction head.

[0012] Furthermore, the high-pressure rotary nozzle is connected to the top of the side wall of the suction head.

[0013] Furthermore, the suction head has a trumpet-shaped structure.

[0014] Furthermore, the bottom end of the suction head is a sawtooth structure.

[0015] Furthermore, the wall thickness of the sawtooth structure tends to become thinner in the direction toward the suction port.

[0016] Furthermore, β and θ are set to preset angles respectively so that the water spray rotating cone surface of the inner core of the rotating nozzle does not intersect with the inner wall of the suction head, wherein β is the angle formed by the central axis of the high-pressure rotary nozzle and the central axis of the suction head, and θ is the cone angle of the water spray rotating cone surface of the inner core of the rotating nozzle.

[0017] Furthermore, the excavation head also includes a handle, and the handle is connected to the suction pipe.

[0018] The beneficial effects of the utility model are:

[0019] 1. The utility model adopts a high-pressure rotary nozzle with a single-point injection and a rotating nozzle core and is installed on a suction head in a specific structural manner. The utility model utilizes the inherent characteristics of the high-pressure rotary nozzle that the high-pressure rotary nozzle shell is fixed to the suction head and the rotating nozzle core rotates in a conical trajectory during operation. It is applied to the excavation head structure. Compared with the prior art that requires multiple nozzles to be installed on the excavation head to achieve multi-point injection, the utility model can achieve single-point injection water flow crushing and expand the operating area by rotating the nozzle core during operation. It has the advantages of both strong impact force of single-point injection water flow and ensuring the operating range of the water jet. It cooperates with the suction head to achieve high-pressure water jet crushing and vacuum suction, so as to smoothly complete the cutting, crushing and suction operations of materials such as soil blocks.

[0020] 2. The utility model further arranges the end of the suction head into a sawtooth structure, which is more conducive to breaking soil blocks, mud blocks and other materials, and the cutting and breaking of materials are more effective, and the excavation and suction efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the excavation head of the utility model;

[0022] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the suction head of the utility model when viewed from above;

[0024] Figure 4 It is a schematic diagram of the overall and explosion structure of the high-pressure rotating nozzle used in the utility model;

[0025] In the figure: 1. high-pressure water gun, 2. water delivery pipe, 3. suction pipe, 4. suction head, 40. suction port, 5. high-pressure rotating nozzle, 51. nozzle mounting seat, 510. yield cavity, 52. high-pressure rotating nozzle, 521. nozzle housing, 5210. outlet, 5211. annular ring, 522. rotating nozzle inner core, 5220. water spray port, 6. handle, 7. nozzle fixing plate, 8. bolt, 9. fixing plate, 91. pressure plate, 10. connecting joint, 11. pipe clamp. DETAILED DESCRIPTION

[0026] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0027] In the description of the present invention, it should be understood that the description indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] As shown in the accompanying drawings, this embodiment provides an excavation head based on a rotating water jet, which includes a high-pressure water gun 1, a water pipe 2, a suction pipe 3, and a suction head 4. The suction head 4 is fixedly connected to the input end of the suction pipe 3, and the suction port 40 of the suction head 4 faces downward and is connected to the inside of the suction pipe 3. The high-pressure water gun 1 is fixedly connected to the suction pipe 3, and the output end of the high-pressure water gun 1 is connected to a high-pressure rotating nozzle 5 through the water pipe 2. The high-pressure rotating nozzle 5 includes a nozzle mounting seat 51 and a high-pressure rotating nozzle 52. The nozzle mounting seat 51 is fixedly connected to the suction head 4, and the high-pressure rotating nozzle 52 is fixed on the nozzle mounting seat 51 and faces the suction port 40.

[0030] The high pressure rotating nozzle 52 described in this embodiment is a prior art. This case aims to connect the high pressure rotating nozzle 52 with the suction head 4 through a specific connection relationship to solve the technical problem described in this case. Specifically, the high pressure rotating nozzle 52 is a commercially available TPR series rotating nozzle from the Italian AR (Aige) company. The exploded diagram of its structure is shown in FIG. Figure 4As shown, the high-pressure rotary nozzle 52 includes a nozzle housing 521, and the front end of the nozzle housing 521 has an outlet 5210 for supplying water to be sprayed into the suction head 4, and the outlet 5210 has an annular ring 5211; in this embodiment, the nozzle housing 521 is fixed in the nozzle mounting seat 51 by the nozzle fixing plate 7 and the bolt 8, and is specifically connected to the top of the side wall of the suction head 4, and the intersection point of the central axis of the high-pressure rotary nozzle 52 and the end face where the suction port 40 is located is close to the center of the suction port 40; the high-pressure rotary nozzle 52 also includes a nozzle housing 521 disposed on the nozzle. The rotating nozzle inner core 522 in the housing 521 has a water outlet 5220 for spraying a single columnar water flow at its front end. The front end of the rotating nozzle inner core 522 is arranged at the outlet 5210 through an annular ring 5211. The rotating nozzle inner core 522 can rotate around the central axis of the high-pressure rotating nozzle 52 under the action of water pressure. During the rotation process, the front end of the rotating nozzle inner core 522 hits the annular ring. The rotation trajectory of the rotating nozzle inner core 522 is conical, and the cone angle of the water spray rotating cone formed is θ. Figure 2 As shown, the water spray cone surface of the rotating nozzle inner core 522 does not contact the inner wall of the suction head 4;

[0031] Correspondingly, the nozzle mounting seat 51 protrudes outward from the suction head 4, and a make way cavity 510 connected to the inner cavity of the suction head 4 is provided inside the nozzle mounting seat 51 corresponding to the water spray cone surface of the rotating nozzle inner core 522, so that the water spray cone surface of the rotating nozzle inner core 522 does not contact the inner wall of the nozzle mounting seat 51.

[0032] When the high-pressure rotary nozzle 52 is installed on the suction head, the bottom of the suction head 4 is the suction port 40, the nozzle mounting seat 51 is installed on the side wall of the suction head 4, and the high-pressure rotary nozzle 52 is connected to the top of the side wall of the suction head 4.

[0033] The suction head 4 is a trumpet-shaped structure. After the high-pressure rotary nozzle 52 is installed on the nozzle mounting seat 51, the central axis of the high-pressure rotary nozzle 52 and the central axis of the suction head 4 form an angle β. Figure 2 As shown; by setting β and θ to preset angles respectively, the water spray rotating cone surface of the rotating nozzle inner core 522 does not intersect with the inner wall of the suction head 4. At the same time, by the coordination of β and θ, the water spray rotating cone surface can form a larger cutting area at the intersection with the end face where the suction port 40 of the suction head 4 is located, that is, Figure 3 The area indicated by the dotted line.

[0034] In a preferred embodiment of the present invention, the bottom end of the suction head 4 is a sawtooth structure, the sawtooth structure is used to assist in breaking the soil blocks, and the lower end of the trumpet-shaped suction head is provided with a cone angle α. Figure 2 As shown, the cone angle α makes the wall thickness of the sawtooth structure tend to become thinner toward the suction port (i.e., the tip direction), so as to facilitate the crushing of soil blocks.

[0035] Before use, the output end of the suction pipe 3 is connected to the suction gas circuit through a connecting joint 10, and is connected to the pneumatic generating device. The suction head 4, the suction pipe 3, and the connecting joint 10 form a gas passage. The handle 6 is fixed to one side of the outer wall of the connecting joint 10, and the fixing plate 9 is fixed to the other side of the outer wall of the connecting joint 10. The high-pressure water gun 1 is fixed to the fixing plate 9 through the pressing plate 91 and the bolt 8, and is connected to the high-pressure water circuit. The lower end of the water pipe 2 is connected to the input end of the high-pressure rotating nozzle 52, and the upper end of the water pipe 2 is connected to the output end of the high-pressure water gun 1. The water pipe 2 is fixed to the outer wall of the suction pipe 3 through the pipe clamp 11; the high-pressure water gun 1, the water pipe 2, and the high-pressure rotating nozzle 52 form a high-pressure water passage.

[0036] During the excavation operation, the operator holds the handle 6 and the high-pressure water gun 1, pulls the trigger of the high-pressure water gun 1, and the high-pressure water passes through the water pipe 2 and the high-pressure rotating nozzle 52, and the single-point linear high-pressure water is sprayed out at high speed from the water spray port of the high-pressure rotating nozzle 52. At the same time, the rotating nozzle inner core 522 in the high-pressure rotating nozzle 52 also rotates, so that the high-speed single-point linear high-pressure water is also continuously rotated, forming a single-point spraying and rotating operation working state. In this way, the area cut by the high-pressure water at the end of the suction head 4 is just slightly smaller than the inner diameter of the suction pipe. For the position that is not easy to be crushed by the water jet, the sawtooth on the end face of the suction head can also be used for auxiliary crushing. Under the action of the rear-end pneumatic generating device, a high-speed negative pressure airflow is formed in the connecting head, the suction pipe, and the trumpet-shaped suction head. The operator manipulates the excavation head at the same time, so that the suction head 4 is close to the cut or crushed block material. Driven by the high-speed airflow, the block material and the surrounding particles enter the rear-end suction pipeline through the suction head 4, the suction pipe 3, and the connecting joint 10 to complete the operation.

[0037] In short, the above is only a preferred embodiment of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model should fall within the scope of the present utility model patent.

Claims

1. An excavation head based on a rotating water jet, comprising a high-pressure water gun (1), a water delivery pipe (2), a suction pipe (3), and a suction head (4), wherein the suction head (4) is fixedly connected to the input end of the suction pipe (3), the suction port (40) of the suction head (4) faces downward and is communicated with the inside of the suction pipe (3), the high-pressure water gun (1) is fixedly connected to the suction pipe (3), and is characterized in that: The output end of the high-pressure water gun (1) is connected to a high-pressure rotating nozzle (5) via a water pipe (2), and the high-pressure rotating nozzle (5) comprises a nozzle mounting seat (51) and a high-pressure rotating nozzle (52); The nozzle mounting seat (51) is fixedly connected to the suction head (4), the high-pressure rotary nozzle (52) is fixed on the nozzle mounting seat (51) and faces the suction port (40), and the intersection point between the central axis of the high-pressure rotary nozzle (52) and the end surface where the suction port (40) is located is close to the center of the suction port (40); The high-pressure rotating spray head (52) comprises a spray head housing (521) fixed on the spray head mounting seat (51), and the front end of the spray head housing (521) has an outlet (5210) for supplying water to spray into the suction head (4); The high-pressure rotary spray head (52) further comprises a rotary spray head inner core (522) disposed within the spray head housing (521); the front end of the rotary spray head inner core (522) comprises a water spray port (5220) for spraying a single columnar water flow; the front end of the rotary spray head inner core (522) is disposed at the outlet (5210); the rotary spray head inner core (522) can rotate around the central axis of the high-pressure rotary spray head (52) under the action of water pressure; the rotation trajectory of the rotary spray head inner core (522) is conical, and the water spraying cone surface of the rotary spray head inner core (522) does not contact the inner wall of the suction head (4); The nozzle mounting seat (51) protrudes outward from the suction head (4), and a clearance cavity (510) is provided inside the nozzle mounting seat (51) corresponding to the water spraying cone surface of the rotating nozzle inner core (522), so that the water spraying cone surface of the rotating nozzle inner core (522) does not contact the inner wall of the nozzle mounting seat (51).

2. The excavation head based on rotating water jet according to claim 1, characterized in that: The nozzle mounting seat (51) is mounted on the side wall of the suction head (4).

3. The excavation head based on rotating water jet according to claim 2, characterized in that: The high-pressure rotating spray head (52) is connected to the top of the side wall of the suction head (4).

4. The excavation head based on rotating water jet according to claim 1, characterized in that: The material suction head (4) is in a trumpet-shaped structure.

5. The excavation head based on rotating water jet according to claim 1 or 4, characterized in that: The bottom end of the suction head (4) is a sawtooth structure.

6. The excavation head based on rotating water jet according to claim 5, characterized in that: The wall thickness of the sawtooth structure tends to become thinner in the direction toward the suction port.

7. The excavation head based on rotating water jet according to claim 3 or 4, characterized in that: β and θ are respectively set to preset angles so that the water spray rotating cone surface of the rotating nozzle inner core (522) does not intersect with the inner wall of the suction head (4), wherein β is the angle formed by the central axis of the high-pressure rotating nozzle (52) and the central axis of the suction head (4), and θ is the cone angle of the water spray rotating cone surface of the rotating nozzle inner core (522).

8. The excavation head based on rotating water jet according to claim 1, characterized in that: It also comprises a handle (6), wherein the handle (6) is connected to the suction pipe (3).

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