High-pressure non-return nozzle

Abstract

The utility model discloses a high-pressure non-return nozzle which comprises an outer shell and an inner shell which are both of a cylindrical structure, the bottom of the outer shell and the bottom of the inner shell are fixedly connected through a mounting plate, a spray head is arranged at the top of the outer shell, a fixing plate is arranged at the top of the inner shell, and a through opening is formed in the side wall of the inner shell. The springback structure is installed on the fixing plate, and the springback direction of the springback structure is the axial direction of the inner shell; the sliding plug is connected with the springback structure; wherein the outer wall of the inner shell and the inner wall of the outer shell form a circulation cavity, in the first state, an inner cavity of the inner shell, the circulation cavity of the outer shell and the spray head form a circulation channel, and in the second state, the sliding plug blocks the through opening, and the inner cavity of the inner shell cannot communicate with the circulation cavity of the outer shell; in the first state, when the springback structure is insufficient in pressure, the sliding plug blocks the through opening; and in the second state, under the condition that the rebound structure is under sufficient pressure, the sliding plug slides towards the fixing plate of the inner shell, and the circulation channel is in a communicating state.

Description

Technical Field

[0001] The utility model relates to the technical field of tailings filling equipment, in particular to a high-pressure check nozzle. Background Art

[0002] Under the increasingly stringent environmental protection policy requirements, backfill mining has developed into the mainstream method of mining, and slurry filling is an important factor in the quality of tailings filling projects. Usually, tailings slurry is used to sink to the bottom of the sand bin under the action of gravity. When the sand level rises to a specified height, slurry filling can be carried out. The slurry making process uses a high-pressure nozzle at the bottom of the sand bin to spray high-pressure water and high-pressure air into the vertical sand bin to break the arch, liquefy the compacted tailings to form a fluid and release it out of the sand bin through the discharge pipe.

[0003] When ordinary nozzles are used for slurry filling, when the slurry water pressure or wind pressure is insufficient, the mortar in the sand bin will flow back into the nozzle, causing damage to the air compressor or slurry pump. Therefore, a high-pressure non-return nozzle is required that can automatically open and spray outward when the pressure is reached, and automatically close when the pressure is insufficient to prevent the mortar from flowing back into the water distribution pipe. Therefore, when the slurry water pressure or wind pressure is insufficient, the nozzles in the prior art cause the mortar to flow back into the water distribution pipe, causing damage to the air compressor or slurry pump. Utility Model Content

[0004] The utility model aims to provide a high-pressure check nozzle to solve the problem in the prior art that when the slurry water pressure or wind pressure is insufficient, mortar flows back into the water distribution pipe, causing damage to the air compressor or slurry pump. The utility model provides a high-pressure check nozzle, comprising: an outer shell and an inner shell, both of which are cylindrical structures, the bottom of the outer shell is fixedly connected to the bottom of the inner shell by a mounting plate, a nozzle is arranged on the top of the outer shell, a fixing plate is arranged on the top of the inner shell, and a through-hole is arranged on the side wall of the inner shell; a rebound structure is mounted on the fixing plate, and the rebound direction of the rebound structure is the axial direction of the inner shell; a sliding plug is connected to the rebound structure; wherein, the outer wall of the inner shell and the inner wall of the outer shell form a flow cavity, in a first state, the inner cavity of the inner shell, the outer shell flow cavity and the nozzle form a flow channel, in a second state, the sliding plug blocks the through-hole, and the inner cavity of the inner shell and the outer shell flow cavity cannot be connected; in the first state, when the pressure of the rebound structure is insufficient, the sliding plug blocks the through-hole; in the second state, when the pressure of the rebound structure is sufficient, the sliding plug slides toward the fixing plate direction of the inner shell, and the flow channel is in a connected state. Through the above structure, when the pulping water pressure or wind pressure is insufficient, the pressure borne by the rebound structure is insufficient, and the sliding plug cannot move. The utility model is in the first state, and the external slurry flows in through the inner shell, and the sliding plug blocks the through port, so that the slurry flows into the nozzle for spraying, realizing the function that the slurry cannot be sprayed when the pressure is insufficient; as the slurry pressure gradually increases to a certain value, the slurry pushes the sliding plug to start moving, until the utility model is in the second state, the external slurry pushes the sliding plug to move toward the top of the inner shell, thereby making the circulation The channel is in a connected state, so that the slurry can flow through the internal cavity of the inner shell, the flow cavity of the outer shell and the nozzle in sequence, realizing the function of sufficient pressure to start the injection. In this state, the rebound structure is in a compressed state. When the pressure gradually begins to decrease, the rebound structure begins to rebound, pushing the sliding plug to move toward the bottom of the inner shell, blocking the passage, thereby switching from the second state to the first state, realizing timely stopping when the pressure is insufficient, avoiding the slurry backflow and causing damage to the air compressor or slurry pump, thereby improving the durability of the equipment during the slurry filling process.

[0005] Furthermore, the through port is provided with a plurality of openings, and the plurality of openings are evenly distributed in the radial direction of the inner shell.

[0006] Furthermore, the number of the openings is set to three, and the three openings are respectively a first opening, a second opening and a third opening, the first opening, the second opening and the third opening are distributed in sequence from bottom to top, the distance between the first opening and the second opening is greater than the length of the sliding plug, and the distance between the second opening and the third opening is greater than the length of the sliding plug.

[0007] Furthermore, the clamping block is arranged on the fixing plate, a through hole is opened inside the clamping block, and the diameter of the through hole is smaller than the diameter of the sliding plug.

[0008] Furthermore, the rebound structure is a spring, one end of the spring is fixedly mounted on the fixed plate, the other end of the spring is fixedly connected to the sliding plug, and the spring is in a compressed state in a natural state.

[0009] Furthermore, it also includes a mounting ring, which is arranged at the bottom end of the clamping block, the mounting ring and the clamping block are coaxially arranged, and the mounting ring is provided with a connecting piece for connecting the injection device.

[0010] Furthermore, the nozzle is detachably connected to the shell.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the flow route of the slurry is formed by the outer shell, the inner shell, the rebound structure, and the sliding plug, and the high-pressure check function is realized by the rebound structure and the sliding plug. Specifically, when the slurry making water pressure or wind pressure is insufficient, the pressure borne by the rebound structure is insufficient, and the sliding plug cannot move. The utility model is in the first state, the external slurry flows in through the inner shell, and the sliding plug blocks the opening, so that the slurry flows into the nozzle for spraying, realizing the function that the slurry cannot be sprayed when the pressure is insufficient;

[0012] As the slurry pressure gradually increases to a certain value, the slurry pushes the sliding plug to start moving until the utility model is in the second state, and the external slurry pushes the sliding plug to move toward the top of the inner shell, so that the circulation channel is in a connected state, so that the slurry can flow through the internal cavity of the inner shell, the outer circulation cavity and the nozzle in sequence, realizing the function of sufficient pressure to start the injection. In this state, the rebound structure is in a compressed state. When the pressure gradually begins to decrease, the rebound structure begins to rebound, pushing the sliding plug to start moving toward the bottom of the inner shell, blocking the passage, thereby switching from the second state to the first state, realizing the function of timely stopping when the pressure is insufficient, avoiding the slurry backflow and causing damage to the air compressor or slurry pump, thereby improving the durability of the equipment during the slurry filling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional structural schematic diagram of the utility model in the first state;

[0014] Figure 2 It is a cross-sectional structural schematic diagram of the utility model in the second state;

[0015] Figure 3 It is a schematic cross-sectional structural diagram of the utility model in the third state.

[0016] In the figure: 1, outer shell; 2, inner shell; 3, mounting plate; 4, nozzle; 5, fixing plate; 6, first port; 7, spring; 8, sliding plug; 9, second port; 10, third port; 11, through hole; 12, mounting ring. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-3The utility model provides a high-pressure check nozzle for solving the problem that when the slurry water pressure or wind pressure of the nozzle is insufficient in the prior art, the mortar flows back into the water distribution pipe, causing damage to the air compressor or slurry pump. The device comprises: an outer shell 1 and an inner shell 2, both of which are cylindrical structures. The bottom of the outer shell 1 is fixedly connected to the bottom of the inner shell 2 through a mounting plate 3. A nozzle 4 is arranged on the top of the outer shell 1, a fixing plate 5 is arranged on the top of the inner shell 2, and a through opening is arranged on the side wall of the inner shell 2; a rebound structure is mounted on the fixing plate 5, and the rebound direction of the rebound structure is the axial direction of the inner shell 2; a sliding plug 8 is connected to the fixing plate 5. The rebound structure is connected; wherein the outer wall of the inner shell 2 and the inner wall of the outer shell 1 form a flow cavity, and in a first state, the internal cavity of the inner shell 2, the flow cavity of the outer shell 1 and the nozzle 4 form a flow channel, and in a second state, the sliding plug 8 blocks the through port, and the internal cavity of the inner shell 2 and the flow cavity of the outer shell 1 cannot be communicated; in the first state, when the pressure of the rebound structure is insufficient, the sliding plug 8 blocks the through port; in the second state, when the pressure of the rebound structure is sufficient, the sliding plug 8 slides toward the fixed plate 5 of the inner shell 2, and the flow channel is in a connected state. Through the above structure, when the slurry making water pressure or wind pressure is insufficient, the pressure borne by the rebound structure is insufficient, and the sliding plug 8 cannot move. The utility model is in the first state, and the external slurry flows in through the inner shell 2, and the sliding plug 8 blocks the through port, so that the slurry flows into the nozzle 4 for injection, realizing the function that the slurry cannot be injected when the pressure is insufficient; as the slurry pressure gradually increases to a certain value, the slurry pushes the sliding plug 8 to start moving, until the utility model is in the second state, the external slurry pushes the sliding plug 8 to move toward the top of the inner shell 2, so that the flow The through channel is in a connected state, so that the slurry can flow through the internal cavity of the inner shell 2, the flow cavity of the outer shell 1 and the nozzle 4 in sequence, realizing the function of sufficient pressure to start the injection. In this state, the rebound structure is in a compressed state. When the pressure gradually begins to decrease, the rebound structure begins to rebound, pushing the sliding plug 8 to move toward the bottom of the inner shell 2, blocking the through port, thereby switching from the second state to the first state, realizing timely stopping when the pressure is insufficient, avoiding the slurry backflow and causing damage to the air compressor or slurry pump, thereby improving the durability of the equipment during the slurry filling process.

[0019] Further, in order to better implement the present invention, please refer to Figure 1-3The through port is provided with a plurality of openings, and the plurality of openings are evenly distributed in the radial direction of the inner shell 2. Usually, eight openings are provided on the through port. The eight openings can make the spraying of the slurry more uniform, and the even arrangement of the eight openings can prevent the pressure of the slurry from being directed to one side, thereby making it easier to control the spraying direction.

[0020] Further, in order to better implement the present invention, please refer to Figure 1-3 , the number of the through-ports is set to three, the three through-ports are respectively a first through-port 6, a second through-port 9 and a third through-port 10, the first through-port 6, the second through-port 9 and the third through-port 10 are arranged in sequence from bottom to top, the distance between the first through-port 6 and the second through-port 9 is greater than the length of the sliding plug 8, the distance between the second through-port 9 and the third through-port 10 is greater than the length of the sliding plug 8, by setting the number of the three through-ports, the injection flow rate can be controlled, when the sliding plug 8 is located at the bottom end of the first through-port 6, the flow passage cannot be connected, and thus the injection cannot be performed, which is the first state; when the sliding plug 8 is located between the first through-port 6 and the second through-port 9, the flow passage passes through the first through-port 6, thereby achieving normal injection, that is It is the second state. When the sliding plug 8 is located between the second port 9 and the third port 10, the flow passage circulates through the first port 6 and the second port 9 to achieve normal flow. This is the third state. The pressure required to reach the third state is much greater than the pressure required for the second state. When the pressure of the slurry continues to increase, the sliding plug 8 is located between the third port 10 and the fixed plate 5. This is the fourth state. When in the fourth state, the slurry circulates through the first port 6, the second port 9 and the third port 10, and finally the pressure and the flow rate of the slurry are gradually increased. In response to different needs, when the pressure drops suddenly, the rebound structure rebounds directly to push the sliding plug 8 to move, thereby achieving the function of immediate backflow prevention.

[0021] Further, in order to better implement the present invention, please refer to Figure 1-3 The fixing plate 5 is provided with the card block, and a through hole 11 is opened inside the card block. The diameter of the through hole 11 is smaller than the diameter of the sliding plug 8. Through the above structure, the sliding plug 8 can be prevented from sliding out from the bottom of the inner shell 2, thereby realizing the installation of the sliding plug 8.

[0022] Further, in order to better implement the present invention, please refer to Figure 1-3The rebound structure is a spring 7, one end of which is fixedly mounted on the fixed plate 5, and the other end of the spring 7 is fixedly connected to the sliding plug 8. The spring 7 is in a compressed state in a natural state, so that when the pressure of the slurry on the sliding plug 8 is gradually reduced, the spring 7 can rebound quickly to achieve a non-return effect.

[0023] Further, in order to better implement the present invention, please refer to Figure 1-3 , further comprising a mounting ring 12, wherein the mounting ring 12 is arranged at the bottom end of the block, the mounting ring 12 is coaxially arranged with the block, and a connecting piece for connecting the injection device is arranged on the mounting ring 12.

[0024] Further, in order to better implement the present invention, please refer to Figure 1-3 The nozzle 4 is detachably connected to the housing 1, and the staff can disassemble and replace the nozzle 4 as needed, which is convenient for maintenance.

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Claims

1. A high-pressure check nozzle, characterized in that: include: The outer shell (1) and the inner shell (2) are both cylindrical structures. The bottom of the outer shell (1) is fixedly connected to the bottom of the inner shell (2) via a mounting plate (3). A nozzle (4) is provided at the top of the outer shell (1), a fixing plate (5) is provided at the top of the inner shell (2), and a through opening is provided on the side wall of the inner shell (2). A rebound structure, mounted on the fixing plate (5), the rebound direction of the rebound structure being the axial direction of the inner shell (2); A sliding plug (8) connected to the rebound structure; The outer wall of the inner shell (2) and the inner wall of the outer shell (1) form a flow cavity. In a first state, the inner cavity of the inner shell (2), the flow cavity of the outer shell (1) and the nozzle (4) form a flow channel. In a second state, the sliding plug (8) blocks the opening, and the inner cavity of the inner shell (2) and the flow cavity of the outer shell (1) cannot communicate with each other. In the first state, when the pressure of the rebound structure is insufficient, the sliding plug (8) blocks the opening; In the second state, when the pressure of the rebound structure is sufficient, the sliding plug (8) slides toward the fixed plate (5) of the inner shell (2), and the circulation channel is in a connected state.

2. A high pressure check nozzle according to claim 1, characterized in that: The through opening is provided with a plurality of openings, and the plurality of openings are evenly distributed in the radial direction of the inner shell (2).

3. A high pressure check nozzle according to claim 2, characterized in that: The number of the through openings is three, and the three through openings are respectively a first through opening (6), a second through opening (9) and a third through opening (10). The first through opening (6), the second through opening (9) and the third through opening (10) are sequentially distributed from bottom to top. The distance between the first through opening (6) and the second through opening (9) is greater than the length of the sliding plug (8), and the distance between the second through opening (9) and the third through opening (10) is greater than the length of the sliding plug (8).

4. A high pressure check nozzle according to claim 1, characterized in that: A clamping block is provided on the fixing plate (5), a through hole (11) is provided inside the clamping block, and the diameter of the through hole (11) is smaller than the diameter of the sliding plug (8).

5. A high pressure check nozzle according to claim 2, characterized in that: The rebound structure is a spring (7), one end of the spring (7) is fixedly mounted on the fixed plate (5), the other end of the spring (7) is fixedly connected to the sliding plug (8), and the spring (7) is in a compressed state in a natural state.

6. A high-pressure check nozzle according to claim 4, characterized in that: It also comprises a mounting ring (12), wherein the mounting ring (12) is arranged at the bottom end of the clamping block, the mounting ring (12) is coaxially arranged with the clamping block, and a connecting piece for connecting the injection device is arranged on the mounting ring (12).

7. A high-pressure check nozzle according to claim 1, characterized in that: The spray head (4) is detachably connected to the housing (1).

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