Negative-pressure self-cleaning vibrating screen

Abstract

The utility model discloses a negative pressure self-cleaning vibrating screen, which relates to the technical field of vibrating screens and comprises a screen body, the top of the screen body is connected with an upper screen frame and a lower screen frame through hoops, the outer ring surface of the upper screen frame is connected with a slag discharge pipe, and a screen mesh is connected between the upper screen frame and the lower screen frame. The side, located in the screen body, of the slag discharging pipe is connected with a baffle, one side of the baffle is connected with a guide plate through a hinge, and the outer wall of the upper screen frame is connected with a negative pressure pipe extending into the upper screen frame. According to the negative-pressure self-cleaning vibrating screen, the negative-pressure pipe component is arranged in the screen body, materials located on the top of the screen mesh can be discharged through negative-pressure airflow, the situation that the screen mesh is manually taken down to be cleaned is avoided, foreign matter can be effectively prevented from entering the screen mesh, the protection capacity of the screen mesh is improved, and the service life of the screen mesh is prolonged. And meanwhile, the circular spray head at the bottom can be matched with the negative pressure pipe, so that the material discharging efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of vibrating screen, more specifically to a negative pressure self -cleaning vibrating screen. BACKGROUND

[0002] The rotary vibrating screen is also called vibrating screen. The rotary vibrating screen can sieve and sort materials. The rotary vibrating screen is provided with a screen mesh. The materials on the screen mesh are sieved through vibration. The materials with small diameters fall from the lower side of the screen mesh and are discharged from the discharge port below the rotary vibrating screen. The materials with large diameters stay on the screen mesh, realizing the sieving and sorting of materials. The rotary vibrating screen is usually provided with a plurality of discharge ports for discharging the sieved materials through different pipelines.

[0003] A circular vibrating screen is disclosed in Chinese Patent No. 202223319420.5. The structure includes a vibrating seat and a screen cylinder. The vibrating seat is arranged on the ground. The screen cylinder is arranged on the side of the vibrating seat away from the ground. The structure further includes a first screen mesh and a second screen mesh. The first screen mesh is arranged in the screen cylinder. The second screen mesh is concentrically arranged on the side end face of the first screen mesh and can rotate circumferentially along the first screen mesh. A plurality of screen holes are formed in the first screen mesh and the second screen mesh. Although the circular vibrating screen has the effect of cleaning the screen mesh during use, it still has the following problems:

[0004] 1. After long-term use, the screen holes may be blocked, affecting the efficiency of sieving. When the top cover is opened to clean the screen mesh, foreign matter may enter the sieving equipment.

[0005] 2. When cleaning, the dust cleaned may enter the discharge port, causing the internal impurities to be not completely cleaned.

[0006] Therefore, it is necessary to provide a negative pressure self-cleaning vibrating screen to solve the above problems. UTILITY MODEL CONTENTS

[0007] In view of the above problems, the utility model provides a negative pressure self-cleaning vibrating screen, which has the effect of conveniently cleaning the screen mesh and preventing impurities from entering the equipment during manual cleaning.

[0008] The utility model discloses a technical scheme to realize the above-mentioned purpose.

[0009] A negative pressure self-cleaning vibrating screen includes a screen body. The top of the screen body is connected with an upper screen frame and a lower screen frame through a hoop. A discharge pipe is connected to the outer surface of the upper screen frame. A screen mesh is connected between the upper screen frame and the lower screen frame. A baffle is connected to one side of the discharge pipe in the screen body. A guide plate is connected to one side of the baffle through a hinge. A negative pressure pipe is connected to the outer wall of the upper screen frame and extends into the interior.

[0010] The side of the guide plate close to the slag discharge pipe is rotationally connected with a threaded rod penetrating the slag discharge pipe, the outer wall of the threaded rod is threadedly connected with a rotating sleeve pipe, and the rotating sleeve pipe is rotationally connected with the side wall of the slag discharge pipe.

[0011] The bottom of the screen is provided with an annular air jet frame, the outer wall of the annular air jet frame is connected with a positive pressure pipe extending out of the lower screen frame, the bottom of the negative pressure pipe is provided with a circular nozzle, the circular nozzle is connected with the annular air jet frame through a communication pipe, and the annular air jet frame is connected with the inner wall of the screen body through a fixing frame.

[0012] Preferably, the bottom of one end of the negative pressure pipe in the screen body is provided with external threads, the lower portion of the negative pressure pipe is provided with a duckbill suction head, and the top of the duckbill suction head is connected with a mounting pipe matched with the threads of the negative pressure pipe.

[0013] Preferably, the inner wall of the duckbill suction head is connected with a guide pipe, and the top of the guide pipe extends into the negative pressure pipe.

[0014] Preferably, the negative pressure pipe and the positive pressure pipe are connected with a hose at one end outside the tank body.

[0015] Preferably, the end of the threaded rod away from the guide plate is connected with a rotating handle.

[0016] Compared with the prior art, the device has the beneficial effects that:

[0017] 1. The negative pressure pipe component is arranged in the screen body, the material on the top of the screen can be discharged through the negative pressure airflow, the situation that the screen is taken down and cleaned manually is avoided, the entry of foreign matters is effectively avoided, the protection capability of the screen is improved, and meanwhile, the circular nozzle at the bottom can be matched with the negative pressure pipe to improve the efficiency of discharging the material.

[0018] 2. The annular air jet frame component is arranged at the bottom of the screen, the annular air jet frame can intermittently spray airflow, the airflow plays a role in impacting the screen to flush out the material clamped in the screen hole, and the effect of cleaning the screen is achieved.

[0019] 3. The guide plate component is arranged on the slag discharge pipe, the opening and closing of the guide plate not only has the role of on-off slag discharge port, but also can adjust the speed of slag discharge. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic view of the device;

[0021] Figure 2 is a sectional view of the device;

[0022] Figure 3 It is the schematic view of the ring-shaped air jet frame and the lower sieve frame structure in the utility model;

[0023] Figure 4 It is the schematic view of the guide plate and the threaded rod structure in the utility model;

[0024] Figure 5 It is the schematic view of the negative pressure pipe and the duckbill suction head structure in the utility model.

[0025] Reference signs:

[0026] 101, sieve body; 102, upper sieve frame; 103, lower sieve frame; 104, slag discharge pipe; 105, sieve screen; 106, baffle; 107, guide plate; 108, negative pressure pipe; 109, threaded rod; 110, rotating sleeve; 111, ring-shaped air jet frame; 112, positive pressure pipe; 113, circular nozzle; 114, communication pipe; 115, external thread; 116, duckbill suction head; 117, mounting pipe; 118, guide pipe. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] Please refer to Figures 1-5 A negative pressure self-cleaning vibrating screen, comprising a sieve body 101, the sieve body 101 comprising a base, a vibrating motor, an arc-shaped disc and the like, used for screening work, the top of the sieve body 101 is connected with an upper sieve frame 102 and a lower sieve frame 103 through a hoop, the upper sieve frame 102 is located on the top of the lower sieve frame 103, a slag discharge pipe 104 is connected on the outer ring surface of the upper sieve frame 102, a discharge pipe is arranged on the lower sieve frame 103, the material after the sieve screen 105 will be discharged from the discharge pipe, the sieve screen 105 is connected between the upper sieve frame 102 and the lower sieve frame 103, the baffle 106 is connected on one side of the slag discharge pipe 104 in the sieve body 101, the guide plate 107 is connected on one side of the baffle 106 through a hinge, the guide plate 107 is connected on the baffle 106 through a hinge, the guide plate 107 can be covered on the slag discharge pipe 104, so that it is attached to one end of the slag discharge pipe 104, when the sieve screen 105 needs to be cleaned, the guide plate 107 is closed, and the equipment is started, so that the sundries in the interior will stay on the sieve screen 105 and be discharged from the negative pressure pipe 108, the sieve screen 105 does not need to be taken out manually for cleaning, the negative pressure pipe 108 extending to the interior is connected on the outer wall of the upper sieve frame 102;

[0029] Reference Figure 3 And Figure 4 The guide plate 107 is rotatably connected to one side of the slag discharge pipe 104 with a threaded rod 109 penetrating through the slag discharge pipe 104. By rotating the threaded rod, the angle of the guide plate 107 opening can be adjusted to control the flow rate when the waste slag is discharged. A rotating sleeve 110 is threadedly connected to the outer wall of the threaded rod 109 and is rotatably connected to the side wall of the slag discharge pipe 104. When normal screening is performed, the guide plate 107 is closed, so that the original material is completely screened on the top of the screen 105, and then the guide plate 107 is opened to discharge the material that has not passed the screening on the top of the screen 105.

[0030] Reference Figure 2 And Figure 3 The bottom of the screen 105 is provided with an annular air jet frame 111. The inner and outer ring surfaces of the annular air jet frame 111 are provided with inclined surfaces, and air flow nozzles are arranged on the inclined surfaces to spray air flow to the screen 105, thereby spraying the material stuck on the screen. The outer wall of the annular air jet frame 111 is connected with a positive pressure pipe 112 extending out of the lower screen frame 103. The bottom of the negative pressure pipe 108 is provided with a circular nozzle 113. The circular nozzle 113 sprays air flow, and the negative pressure pipe 108 sucks the air flow. After passing through the screen 105, the air flow carries the material particles into the negative pressure pipe 108 to send the large particles of material into the negative pressure pipe 108. The circular nozzle 113 is connected with the annular air jet frame 111 through a communication pipe 114. The annular air jet frame 111 is connected to the inner wall of the screen body 101 through a fixing frame.

[0031] Since the negative pressure pipe 108 is fixed to the upper screen frame 102, it is not convenient to adjust the distance between the negative pressure pipe 108 and the screen 105. Therefore, a structure capable of adjusting the distance is provided. Specifically, referring to Figure 4 And Figure 5 One end of the negative pressure pipe 108 is provided with external threads 115 at the bottom inside the screen body 101. The inner ring surface of the mounting pipe 117 is provided with internal threads corresponding to the external threads 115. A duckbill suction head 116 is arranged below the negative pressure pipe 108. The bottom of the duckbill suction head 116 is flat. The top of the duckbill suction head 116 is connected with the mounting pipe 117 threadedly matched with the negative pressure pipe 108. The duckbill suction head 116 is threadedly mounted at the bottom of the negative pressure pipe 108, so as to conveniently adjust the distance between the duckbill suction head 116 and the screen 105.

[0032] Specifically, referring to Figure 5 The inner wall of the duckbill suction head 116 is connected with a guide pipe 118 located between the negative pressure pipe 108 and the duckbill suction head 116 to prevent sundries from entering the threaded connection and causing installation jamming. The top of the guide pipe 118 extends into the negative pressure pipe 108.

[0033] Specifically, the negative pressure pipe 108 and the positive pressure pipe 112 are connected with hoses at one end outside the tank body, and the positive pressure pipe 112 and the negative pressure pipe 108 are connected with the external equipment by using the hoses, the negative pressure pipe 108 is connected with the negative pressure equipment, and the positive pressure pipe 112 is connected with the positive pressure equipment.

[0034] Specifically, referring to Figure 1 , one end of the threaded rod 109 away from the guide plate 107 is connected with a rotating handle, so as to rotate the threaded rod 109 and adjust the opening angle of the guide plate 107.

[0035] In the embodiment, when screening, the guide plate 107 is closed, so that the raw material can be completely screened on the screen 105, after screening, the guide plate 107 is opened, the material not passing through the screen 105 is discharged through the discharge pipe 104, when the screen 105 needs to be cleaned, the guide plate 107 is closed, the annular air jet frame 111 and the circular nozzle 113 intermittently spray air flow to the screen 105, so that the material stuck on the screen 105 is washed down and then discharged through the negative pressure pipe 108.

[0036] The above-mentioned embodiment is only the preferred embodiment of the present application, and cannot be used to limit the scope of protection of the present application, and any non-essential changes and replacements made by the person skilled in the art on the basis of the present application all belong to the scope of protection of the present application.

Claims

1. A negative pressure self-cleaning vibrating screen, comprising a screen body (101), the top of the screen body (101) is connected with an upper screen frame (102) and a lower screen frame (103) through a hoop, an outer ring surface of the upper screen frame (102) is connected with a deslagging pipe (104), and a screen mesh (105) is connected between the upper screen frame (102) and the lower screen frame (103), characterized in that: The slagging pipe (104) is connected with a baffle (106) on one side in the screen body (101), one side of the baffle (106) is connected with a guide plate (107) through a hinge, the outer wall of the upper screen frame (102) is connected with a negative pressure pipe (108) extending to the inside, and the bottom of the negative pressure pipe (108) is provided with a circular nozzle (113). The side of the guide plate (107) close to the slagging pipe (104) is rotationally connected with a threaded rod (109) penetrating the slagging pipe (104), the outer wall of the threaded rod (109) is threadedly connected with a rotating sleeve (110), and the rotating sleeve (110) is rotationally connected to the side wall of the slagging pipe (104). The bottom of the screen (105) is provided with an annular air jet frame (111), the outer wall of the annular air jet frame (111) is connected with a positive pressure pipe (112) extending out of the lower screen frame (103), the bottom of the negative pressure pipe (108) is provided with a circular nozzle (113), the circular nozzle (113) is connected with the annular air jet frame (111) through a communication pipe (114), and the annular air jet frame (111) is connected to the inner wall of the screen body (101) through a fixing frame.

2. A negative pressure self-cleaning vibrating screen according to claim 1, wherein: One end of the negative pressure pipe (108) is provided with an external thread (115) at the bottom in the screen body (101), the negative pressure pipe (108) is provided with a duckbill suction head (116) below, and the top of the duckbill suction head (116) is connected with a mounting pipe (117) threadedly matched with the negative pressure pipe (108).

3. A negative pressure self-cleaning vibrating screen according to claim 2, wherein: The inner wall of the duckbill suction head (116) is connected with a guide pipe (118), and the top of the guide pipe (118) extends into the negative pressure pipe (108).

4. A negative pressure self-cleaning vibrating screen according to claim 3, wherein: The negative pressure pipe (108) and the positive pressure pipe (112) are connected with a hose at one end outside the tank body.

5. A self-cleaning negative pressure vibrating screen according to claim 1, wherein: The end of the threaded rod (109) away from the guide plate (107) is connected with a rotating handle.

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