Sand screening machine for water conservancy project
By introducing an adjustment device into the sand screening machine, the screen mesh size can be adjusted using a screw and adjustment plate, combined with the vibration of a vibrator, thus solving the problem of downtime during screen replacement and improving sand screening efficiency and screening continuity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN LINGHAO CONSTRUCTION ENGINEERING CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-05-19
AI Technical Summary
Existing sand screening machines require shutdown when changing screens, resulting in reduced screening efficiency and an inability to adjust the size of the sand to be screened.
A screen with an adjustment device was designed. The screen mesh size can be adjusted by screw and adjustment plate, and efficient screening can be achieved by combining the vibration of XJD vibrator.
It enables adjustment of the screen mesh size without stopping the machine, improving sand screening efficiency, avoiding screen jamming, and ensuring the continuity of the screening process.
Smart Images
Figure CN224253475U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of sand screening machines for water conservancy projects, and in particular to a sand screening machine for water conservancy projects. Background Technology
[0002] A sand screening machine, also known as a dryland sand screening vessel or sand and gravel separator, is a sand and gravel separation device suitable for rivers, reservoirs, and coal yards. It consists of a hull, frame, reducer, conveyor belt, rotary screen, and engine or motor. This machine has a simple structure, is economical and practical, and easy to operate. It is available in various types, including drum-type sand screening machines, water-washed drum-type sand screening machines, and vibrating screen-type sand screening machines.
[0003] The inventors discovered during routine use of the sand screening machine that when the size of the sand particles to be screened needs to be adjusted, the screen of the sand screening machine needs to be replaced. Since the sand screening machine needs to be stopped during the replacement, it becomes impossible to screen sand, which leads to a decrease in sand screening efficiency and causes problems. Utility Model Content
[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a sand screening machine for water conservancy projects.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a sand screening machine for water conservancy projects, including a screening frame, an XJD vibrator fixedly connected to the side of the screening frame, a screen mesh inside the screening frame, a discharge port fixedly connected inside the screening frame, an adjustment device inside the screen mesh, the adjustment device including a rectangular groove on the side of the screen mesh, a groove on the inner wall of the rectangular groove, a screw rotatably connected inside the groove, and an adjustment plate threadedly connected to the surface of the screw.
[0006] The effect achieved by the above components is as follows: under the action of the screw, the adjusting plate moves inside the rectangular groove, which can block the mesh holes on the screen surface, thereby achieving the function of adjusting the screen mesh holes. When it is necessary to screen sand in water conservancy projects, the XJD vibrator is started, which drives the eccentric block to vibrate the screen through the coupling, thereby causing the screen to vibrate at high frequency, thus separating the sand from the stones. As a result, the stones fall from one side of the screen, and the sand is discharged from the outlet, thus completing the screening function.
[0007] Preferably, a protruding plate is fixedly connected to the top of the adjusting plate, and the protruding plate fits against the inner wall of the rectangular groove.
[0008] The effect achieved by the above components is that, under the action of the convex plate, sand will not get stuck between the adjusting plate and the rectangular groove, thus avoiding the phenomenon of the adjusting plate getting stuck.
[0009] Preferably, a locking rod is inserted into the side of the screw, and a circular groove is formed on the side of the screen, with the locking rod inserted into the inside of the circular groove.
[0010] The effect achieved by the above components is that, under the action of the clamping rod, the screw can move the adjusting plate to a suitable position and then fix it. Since the clamping rod is inserted into a relatively deep position in the screen, the clamping rod will not be vibrated out.
[0011] Preferably, a first spring is sleeved on the surface of the clamp rod, and the two ends of the first spring are respectively fixedly connected to one end of the screw rod and one end of the clamp rod.
[0012] The aforementioned components achieve the following effects: Under the action of the first spring, the locking rod will not slip out of the circular groove. When it is necessary to adjust the size of the screen shell, the locking rod is pulled out of the circular groove, and the screw is rotated to move the adjusting plate. After adjusting to the appropriate position, the locking rod is inserted into the circular groove. Because the locking rod is inserted into the screen relatively deeply, under the action of the first spring, the locking rod will not slip out of the circular groove, thus preventing the locking rod from being shaken out. Under the action of the convex plate, sand will not get stuck between the adjusting plate and the rectangular groove, avoiding the phenomenon of the adjusting plate getting stuck, thereby achieving the function of adjusting the size of the screen mesh.
[0013] Preferably, the side of the screening rack is provided with a blocking device, the blocking device including a groove formed on the side of the screening rack, a baffle plate slidably connected inside the groove, a slot formed on the side of the baffle plate, and a locking rod inserted into the side of the screening rack.
[0014] The effect achieved by the above components is that, under the action of the locking rod, the baffle plate can be fixed inside the slide groove, avoiding the phenomenon of the baffle plate shifting. Since the locking rod is inserted into a deeper position of the baffle plate, the phenomenon of the locking rod being vibrated out by the XJD vibrating machine will not occur.
[0015] Preferably, a rectangular plate is fixedly connected to the top of the barrier plate, and a rubber plate is fixedly connected to the bottom of the rectangular plate.
[0016] The effect achieved by the above components is that, under the action of the rectangular plate, the barrier plate will not be completely inserted into the interior of the slide groove, thus preventing it from being inconvenient to remove.
[0017] Preferably, a limiting strip is fixedly connected to the surface of the screen, and the limiting strip is a rubber strip.
[0018] The effect achieved by the above components is that, under the action of the limiting strip, the sand can move slowly on the surface of the screen, thereby making the screening more thorough.
[0019] Preferably, a second spring is sleeved on the surface of the positioning rod, and the two ends of the second spring are fixedly connected to one end of the positioning rod on the side of the screening rack.
[0020] The effect achieved by the above components is as follows: Under the action of the second spring, the locking rod will not slip out of the slot. When it is necessary to block the sand and prevent it from moving too fast on the screen surface, the baffle plate is inserted into the slide groove and the locking rod is inserted into the slot. Since the locking rod is inserted deep into the baffle plate, under the action of the second spring, the locking rod will not slip out of the slot, thus preventing the locking rod from being shaken out by the XJD vibrator. Under the action of the limiting strip, the sand can move slowly on the screen surface, thus allowing for more thorough screening and achieving the blocking effect.
[0021] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0022] In this invention, by setting an adjustment device, when it is necessary to adjust the size of the screen outer shell, the locking rod is pulled out from the inside of the circular groove, and the screw is rotated to move the adjustment plate. After adjusting to the appropriate position, the locking rod is inserted into the inside of the circular groove. Because the locking rod is inserted into a relatively deep position in the screen, under the action of the first spring, the locking rod will not slip out from the inside of the circular groove, thus preventing the locking rod from being shaken out. Under the action of the convex plate, the sand will not get stuck between the adjustment plate and the rectangular groove, avoiding the phenomenon of the adjustment plate getting stuck. This achieves the function of adjusting the size of the screen mesh, thereby solving the problem of not being able to adjust the size of the sand during the sand screening process. Attached Figure Description
[0023] Figure 1 This utility model provides a three-dimensional structural schematic diagram of a sand screening machine for water conservancy projects;
[0024] Figure 2 This utility model provides a schematic diagram of an adjustment device for a sand screening machine used in water conservancy projects;
[0025] Figure 3 This utility model presents a schematic diagram of a blocking device for a sand screening machine used in water conservancy projects.
[0026] Legend: 1. Screening rack; 2. Adjusting device; 21. Rectangular groove; 22. Groove; 23. Screw; 24. Adjusting plate; 25. Protruding plate; 26. Locking rod; 27. First spring; 3. Blocking device; 31. Slide groove; 32. Blocking plate; 33. Rectangular plate; 34. Locking rod; 35. Locking groove; 36. Second spring; 37. Limiting strip; 4. Screen; 5. XJD vibrator; 6. Discharge port. Detailed Implementation
[0027] Example 1, such as Figure 1 A sand screening machine for water conservancy projects includes a screening frame 1, an XJD vibrator 5 fixedly connected to the side of the screening frame 1, a screen 4 inside the screening frame 1, a discharge port 6 fixedly connected inside the screening frame 1, and an adjustment device 2 inside the screen 4.
[0028] The working principle of the plate vibrating sand screen is as follows: When screening sand in a water conservancy project is required, the XJD vibrator 5 is started. The XJD vibrator 5 drives the eccentric block through the coupling to vibrate the screen 4, causing the screen 4 to vibrate at high frequency. This separates the sand from the stones, causing the stones to fall off one side of the screen 4 and the sand to be discharged from the outlet 6, thus completing the screening process. The working principle of the plate vibrating sand screen is to utilize the high-frequency vibration of the screen body to screen and classify the material. This is achieved through the vibration generated by vibrating motors mounted on different shafts. When the motors rotate, the eccentric blocks generate centrifugal and centripetal forces, causing the screen to vibrate along its axial direction. This vibration loosens the material on the screen surface, allowing fine particles to pass through the screen holes and be screened. The screening process can be adjusted according to the size and shape of the particles to achieve the desired screening effect.
[0029] Reference Figure 2 The adjusting device 2 includes a rectangular groove 21 on the side of the screen 4. The inner wall of the rectangular groove 21 has a groove 22. A screw 23 is rotatably connected inside the groove 22. An adjusting plate 24 is threadedly connected to the surface of the screw 23. A protruding plate 25 is fixedly connected to the top of the adjusting plate 24. The protruding plate 25 fits against the inner wall of the rectangular groove 21. A locking rod 26 is inserted into the side of the screw 23. A circular groove is opened on the side of the screen 4. The locking rod 26 is inserted into the inside of the circular groove. A first spring 27 is sleeved on the surface of the locking rod 26. The two ends of the first spring 27 are fixedly connected to one end of the screw 23 and one end of the locking rod 26, respectively.
[0030] Working principle: When it is necessary to adjust the size of the outer shell of the screen 4, pull out the locking rod 26 from the inside of the circular groove, rotate the screw 23 to move the adjusting plate 24. After adjusting to the appropriate position, insert the locking rod 26 into the inside of the circular groove. Because the locking rod 26 is inserted into the screen 4 relatively deeply, under the action of the first spring 27, the locking rod 26 will not slip out of the inside of the circular groove, thus preventing the locking rod 26 from being shaken out. Under the action of the convex plate 25, sand will not get stuck between the adjusting plate 24 and the rectangular groove 21, avoiding the phenomenon of the adjusting plate 24 getting stuck, thereby achieving the function of adjusting the mesh size of the screen 4.
[0031] Reference Figure 3The side of the screening rack 1 is provided with a blocking device 3. The blocking device 3 includes a groove 31 opened on the side of the screening rack 1. A baffle plate 32 is slidably connected inside the groove 31. A slot 35 is opened on the side of the baffle plate 32. A locking rod 34 is inserted into the side of the screening rack 1. A rectangular plate 33 is fixedly connected to the top of the baffle plate 32. A rubber plate is fixedly connected to the bottom of the rectangular plate 33. A limit strip 37 is fixedly connected to the surface of the screen 4. The limit strip 37 is a rubber strip. A second spring 36 is sleeved on the surface of the locking rod 34. The two ends of the second spring 36 are fixedly connected to the side of the screening rack 1 and one end of the locking rod 34, respectively.
[0032] Working principle: When it is necessary to block sand and prevent it from moving too fast on the surface of the screen 4, the baffle plate 32 is inserted into the sliding groove 31, and the locking rod 34 is inserted into the locking groove 35. Since the locking rod 34 is inserted deep into the baffle plate 32, under the action of the second spring 36, the locking rod 34 will not slip out of the locking groove 35, and thus will not be vibrated out by the XJD vibrator 5. Under the action of the limiting strip 37, the sand can move slowly on the surface of the screen 4, so that the screening can be more thorough, thereby achieving the blocking effect.
Claims
1. A sand screening machine for water conservancy projects, comprising a screening frame (1), a vibrator (5) fixedly connected to the side of the screening frame (1), a screen (4) provided inside the screening frame (1), and a discharge port (6) fixedly connected inside the screening frame (1), characterized in that: The screen (4) is provided with an adjustment device (2) inside. The adjustment device (2) includes a rectangular groove (21) opened on the side of the screen (4). The inner wall of the rectangular groove (21) is provided with a groove (22). A screw (23) is rotatably connected inside the groove (22). An adjustment plate (24) is threadedly connected to the surface of the screw (23).
2. The sand screening machine for water conservancy projects according to claim 1, characterized in that: A protruding plate (25) is fixedly connected to the top of the adjusting plate (24), and the protruding plate (25) is in contact with the inner wall of the rectangular groove (21).
3. The sand screening machine for water conservancy projects according to claim 2, characterized in that: A locking rod (26) is inserted into the side of the screw (23), and a circular groove is opened on the side of the screen (4), with the locking rod (26) inserted into the inside of the circular groove.
4. The sand screening machine for water conservancy projects according to claim 3, characterized in that: The surface of the lever (26) is fitted with a first spring (27), and the two ends of the first spring (27) are fixedly connected to one end of the screw (23) and one end of the lever (26).
5. The sand screening machine for water conservancy projects according to claim 4, characterized in that: The screening rack (1) is provided with a blocking device (3) on its side. The blocking device (3) includes a groove (31) opened on the side of the screening rack (1). A baffle plate (32) is slidably connected inside the groove (31). A slot (35) is opened on the side of the baffle plate (32). A locking rod (34) is inserted into the side of the screening rack (1).
6. The sand screening machine for water conservancy projects according to claim 5, characterized in that: A rectangular plate (33) is fixedly connected to the top of the barrier plate (32), and a rubber plate is fixedly connected to the bottom of the rectangular plate (33).
7. The sand screening machine for water conservancy projects according to claim 6, characterized in that: The surface of the screen (4) is fixedly connected with a limiting strip (37), which is a rubber strip.
8. The sand screening machine for water conservancy projects according to claim 7, characterized in that: A second spring (36) is sleeved on the surface of the positioning rod (34), and the two ends of the second spring (36) are fixedly connected to one end of the positioning rod (34) on the side of the screening rack (1).