Stroke limiting device of sand sucker

Abstract

The utility model discloses a stroke limiting device of a sand sucker, which is mounted above the water surface of a water tank to be treated through a frame, is convenient for a worker to overhaul and check the stroke limit of the sand sucker, and comprises a gear component, a driving gear and a plurality of driven gears, the driving gear is mounted on an output shaft of the speed reducer; the threaded screw rod is arranged in the central hole of the driven gear at the tail end in a penetrating manner; the sliding block is movably arranged on the threaded lead screw in a sleeving mode, and an induction rod is horizontally arranged on one side of the sliding block; the proximity switch is installed below the induction rod and on the proximity switch through a support, two induction areas are arranged at the head end and the tail end of the movement stroke of the induction rod, the speed reducer drives the gear assembly to rotate in the same direction, the driven gear at the tail end drives the threaded lead screw to rotate in the same direction, and the sliding block and the induction rod move linearly on the threaded lead screw. After the induction rod makes contact with the induction area of one proximity switch, the induction area sends an electric signal, the speed reducer rotates reversely, the sand sucker is controlled to reciprocate, and control is accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection equipment, in particular to a travel limiting device of a sand suction machine. Background Art

[0002] The sand sucking machine is a device which runs back and forth in the rectangular sand settling tank to be processed and lifts the sand and water mixture settled at the bottom of the tank through a pump and discharges it to the side of the tank. The existing sand sucking machine is driven by a circular chain of a main driving device arranged above the water tank, so as to reciprocate left and right along three tracks fixedly installed at the bottom of the water tank. However, due to the deep water tank, the staff cannot see the sand sucking machine in the water with the naked eye, and cannot judge the movement of the sand sucking machine from the existing main driving device of the sand sucking machine to achieve the stroke limit of the sand sucking machine. Utility Model Content

[0003] In view of the shortcomings of the above-mentioned existing sand suction machines, such as being arranged at the bottom of the water and being unable to distinguish the movement status to achieve stroke limiting, the applicant provides a stroke limiting device for a sand suction machine, which and the driving wheel of the sand suction machine are both installed on a reducer and located above the water surface. The stroke limiting device has a gear assembly and a threaded screw that rotate in the same direction, so that the slider and the sensing rod on the threaded screw slide above the proximity switch, so that the proximity switch controls the reducer to rotate forward or reverse, which is convenient for the staff to inspect and check the movement status of the sand suction machine.

[0004] The technical solutions and beneficial effects adopted by the utility model are as follows:

[0005] A travel limit device for a sand suction machine, which is installed above the water surface of a water pool to be treated through a frame, comprises:

[0006] - Gear assembly, comprising a driving gear and a plurality of driven gears arranged on the same vertical plane and meshing with each other, the driving gear being mounted on the output shaft of the reducer;

[0007] ——The threaded screw is inserted into the central hole of the driven gear at the end;

[0008] - a slider, which is movably sleeved on the threaded screw, and a sensing rod is horizontally arranged on a side of the slider away from the end driven gear;

[0009] ——The proximity switch is installed under the sensing rod through a bracket, and two sensing areas are set on the proximity switch and at the beginning and end of the sensing rod's moving stroke;

[0010] The reducer drives the driving gear to rotate, and the driving gear drives the several driven gears to rotate in the same direction. The driven gear at the end drives the threaded screw to rotate in the same direction. The slider and the sensing rod move linearly on the threaded screw. After the sensing rod contacts the sensing area of ​​one of the proximity switches, the sensing area sends an electrical signal and the reducer reverses.

[0011] The travel limit device is set above the water surface, which is convenient for the staff to inspect and check the travel limit of the sand suction machine. The reducer drives the gear assembly and the threaded screw to rotate in the same direction, so that the slider slides on the threaded screw. When the sensing rod touches the sensing area of ​​the proximity switch, the sensing area sends an electrical signal to indicate that the stroke is in place, and the reducer reverses to control the sand suction machine to reciprocate on the bottom of the pool with precise control.

[0012] As a further improvement of the above technical solution:

[0013] The driven gear at the end is located in the center of the threaded screw, and the driven gear at the end divides the threaded screw into two identical sections.

[0014] The bracket is parallel to the threaded screw and is arranged at a certain distance therefrom, and the length of the bracket is equal to the length of the threaded screw.

[0015] The bracket is arranged in an "L" shape, with a horizontal side fixed on the frame and a vertical side arranged close to the slider.

[0016] On a horizontal side of the bracket, two groups of proximity switches are symmetrically installed on the front and rear sides of the most end driven gear, and the proximity switches have a certain length.

[0017] Two long strip limiting grooves are arranged on a vertical side of the bracket corresponding to the proximity switch.

[0018] Two slide blocks are provided, which are respectively located at the front and rear sides of the most end driven gear, and the sensing rod passes through the limiting groove of the bracket and extends above the sensing area of ​​the proximity switch.

[0019] The proximity switches are arranged in two groups for mutual backup to prevent one group of proximity switches from malfunctioning, and the limit grooves on the bracket limit the movement of the sensing rod.

[0020] The position of the sensing area on the proximity switch can be adjusted. By adjusting the position of the proximity switch, the travel limit of various distances can be achieved, which is flexible and controllable.

[0021] The driven gears are arranged in two and three sets of gears are used for connection and rotation, so the structure is simple, easy to use and has high precision.

[0022] The entire sensing rod or the head thereof is made of metal. When the sensing rod made of metal is above the sensing area, it can trigger the sensing area to send a signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the overall equipment of the sand suction machine equipped with the stroke limiting device of the utility model.

[0024] Figure 2 for Figure 1 A partial enlarged view of part A in the middle.

[0025] Figure 3 It is a top view of the overall equipment of the sand suction machine.

[0026] Figure 4 It is a three-dimensional diagram of the overall equipment of the sand suction machine.

[0027] Figure 5 for Figure 4 A partial enlarged view of part B in the middle.

[0028] Figure 6 It is a structural schematic diagram of the travel limit device of the utility model.

[0029] In the figure: 1. frame; 2. gear assembly; 21. driving gear; 22. first driven gear; 23. second driven gear; 3. bearing seat; 4. threaded screw; 5. slider; 51. sensing rod; 6. bracket; 61. limit groove; 7. proximity switch; 71. sensing area; 8. reducer; 9. driving wheel; 10. tensioner wheel assembly; 101. tensioner wheel; 102. spring; 11. guide wheel; 12. chain. DETAILED DESCRIPTION

[0030] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0031] like Figure 1 , Figure 3 , Figure 4The figure shows a whole device of a sand suction machine equipped with a stroke limit device of the utility model. A rectangular parallelepiped frame 1 is arranged in a sand settling tank (not shown in the figure) to be treated. The upper part of the frame 1 is exposed to the water surface. A reciprocating sand suction machine (not shown in the figure) is arranged below the frame 1 and at the bottom of the water tank. The frame 1 is sequentially installed with a driving wheel 9, a tensioning wheel assembly 10 and a guide wheel 11 from top to bottom. The driving wheel 9 is installed on the output shaft of the reducer 8 and driven to rotate by it. The driving wheel 9 and the reducer 8 are located above the water tank and exposed to the water surface, which is convenient for maintenance by the staff. The tensioning wheel assembly 10 is arranged on two mutually parallel cross bars below the stroke limit device. The tensioning wheel assembly 10 has two tensioning wheels 101. Four springs 102 are arranged between the opposite outer sides of the two tensioning wheels 101 and the frame 1 and on the outer periphery of the two cross bars. The two guide wheels 11 are fixed to the bottom of the frame 1. The driving wheel 9, the tensioning wheel 101 and the guide wheel 11 are located on the same vertical plane. The chain 12 is wound around the outer periphery of the driving wheel 9, the inner sides of the two tensioning wheels 101 and the outer sides of the two guide wheels 11. The two ends of the bottom of the chain 12 are connected to the sand sucking machine. In this embodiment, the chain 12 is a circular chain. When the driving wheel 9 rotates, the chain 12 follows the driving wheel 9 for transmission. The chain 12 drives the two tensioning wheels 101 to move left and right along the cross bar. The spring 102 is compressed or stretched after being stressed. Its elasticity can be used to adjust the tightness of the chain 12 to avoid vibration and slipping of the chain 12. The guide wheel 11 only rotates to transmit the chain 12 but does not move left and right. The chain 12 drives the sand sucking machine at the bottom of the pool to move back and forth left and right.

[0032] like Figure 1-6As shown, the travel limit device of the sand suction machine of the utility model is arranged on one side of the driving wheel 9 and above the water surface of the sand settling tank to be processed, so as to facilitate the staff to inspect and check the travel limit of the sand suction machine. The gear assembly 2 of the travel limit device has a driving gear 21, a first driven gear 22 and a second driven gear 23 that are meshed with each other, wherein the driving gear 21 is arranged between the driving wheel 9 and the reducer 8 and is sleeved on the outer periphery of the output shaft of the reducer 8. In this embodiment, the three gears are arranged on the same vertical plane but not on the same horizontal plane. When the reducer 8 rotates, the driving gear 21 and the driving wheel 9 rotate in the same direction, and the first driven gear 22 and the second driven gear 23 rotate with it. A threaded screw 4 arranged vertically thereto is penetrated in the central hole of the second driven gear 23, and the second driven gear 23 is located in the center of the threaded screw 4, that is, the second driven gear 23 divides the threaded screw 4 into two identical sections, and the two ends of the threaded screw 4 are connected to the bearing seat 3. An "L"-shaped bracket 6 is installed at a certain distance on the other side of the second driven gear 23. The bracket 6 is parallel to the threaded screw 4 and its length is equivalent to that of the threaded screw 4. A horizontal side of the bracket 6 is fixed on the frame 1, and a proximity switch 7 is installed thereon. In the present embodiment, the proximity switches 7 are provided in two groups for mutual use to prevent one group of proximity switches 7 from malfunctioning. The two groups of proximity switches 7 are respectively installed on the front and rear sides of the second driven gear 23 corresponding to the two sections of the threaded screw 4. The proximity switches 7 have a certain length. Each group of proximity switches 7 has two sensing areas 71 symmetrically arranged at its two ends. A long strip limiting groove 61 is provided on the vertical side of the bracket 6 corresponding to the proximity switch 7, and the length of the limiting groove 61 is equivalent to the total length of the two proximity switches 7. Two sliders 5 are respectively sleeved on the two-section threaded screw 4. The slider 5 is connected to a horizontally arranged sensing rod 51 at one end close to the proximity switch 7. The sensing rod 51 and the bracket 6 are perpendicular to each other. The sensing rod 51 passes through the limiting groove 61 of the bracket 6 and extends to above the sensing area 71 of the proximity switch 7. The entire sensing rod 51 or the head thereof is made of metal. When it is located above the sensing area 71 of the proximity switch 7, it can trigger the sensing area 71 to send a signal.

[0033] In actual use, the reducer 8 drives the driving gear 21 and the driving wheel 9 to rotate clockwise, and the driving gear 21 drives the first driven gear 22 and the second driven gear 23 to rotate clockwise synchronously. Three sets of gears are used to connect and rotate, the structure is simple, easy to use and has high precision, the second driven gear 23 drives the threaded screw 4 to rotate clockwise synchronously, and the two sliders 5 on the threaded screw 4 together with the sensing rod 51 make linear motion synchronously in the same direction along the threaded screw 4. When the two sliders 5 move to the end of the stroke on the threaded screw 4, the two sensing rods 51 touch the sensing area 71 of the proximity switch 7. After the sensing area 71 sends an electrical signal indicating that the stroke is in place, the reducer 8 reverses, so that the driving wheel 9, the driving gear 21, the first driven gear 22, the second driven gear 23, and the threaded screw 4 are all reversed, and the slider 5 moves in the opposite direction, and the above steps are repeated. The position of the sand suction machine at the bottom of the pool can be judged by observing the movement of the stroke limit device. The sensing area 71 of the proximity switch 7 is adjustable. By adjusting the position of the proximity switch 7, a variety of distances of stroke limit can be achieved, which is flexible and controllable.

[0034] The above description is an explanation of the present invention, not a limitation of the present invention. Without violating the spirit of the present invention, the present invention may be modified in any form, such as the length of the limit groove 61 is equal to the length of a proximity switch 7.

Claims

1. A travel limit device for a sand suction machine, which is installed above the water surface of a water pool to be treated through a frame (1), and is characterized by: include: - a gear assembly (2), comprising a driving gear (21) and a plurality of driven gears arranged on the same vertical plane and meshing with each other, wherein the driving gear (21) is mounted on an output shaft of the reducer (8); - a threaded screw (4), which is inserted into the central hole of the driven gear at the end; - a slider (5) movably sleeved on the threaded screw (4), wherein the slider (5) is horizontally provided with a sensing rod (51) on a side away from the end driven gear; - a proximity switch (7) mounted below the sensing rod (51) via a bracket (6), and two sensing areas (71) are arranged on the proximity switch (7) and at the beginning and end of the moving stroke of the sensing rod (51); The reducer (8) drives the driving gear (21) to rotate, and the driving gear (21) drives the plurality of driven gears to rotate in the same direction, and the driven gear at the end drives the threaded screw (4) to rotate in the same direction, and the slider (5) together with the sensing rod (51) moves linearly on the threaded screw (4), and when the sensing rod (51) contacts the sensing area (71) of one of the proximity switches (7), the sensing area (71) sends an electrical signal, and the reducer (8) reverses.

2. The travel limit device of the sand suction machine according to claim 1, characterized in that: The driven gear at the end is located in the center of the threaded screw (4), and the driven gear at the end divides the threaded screw (4) into two identical sections.

3. The travel limit device of the sand suction machine according to claim 1, characterized in that: The bracket (6) is parallel to the threaded screw (4) and is arranged at a certain distance therefrom, and the length of the bracket (6) is equivalent to the length of the threaded screw (4).

4. The travel limit device of the sand suction machine according to claim 3 is characterized in that: The bracket (6) is arranged in an "L" shape, with a horizontal side fixed on the frame (1) and a vertical side arranged close to the slider (5).

5. The travel limit device of the sand suction machine according to claim 4, characterized in that: Two groups of proximity switches (7) are symmetrically mounted on a horizontal side of the bracket (6) and on both sides of the rear and rear of the driven gear at the end, and the proximity switches (7) have a certain length.

6. The travel limit device of the sand suction machine according to claim 5, characterized in that: Two long strip-shaped limiting grooves (61) are formed on a vertical surface of the bracket (6) corresponding to the proximity switch (7).

7. The travel limit device of the sand suction machine according to claim 6, characterized in that: The sliders (5) are provided in two numbers, and are respectively located at the front and rear sides of the driven gear at the end. The sensing rod (51) passes through the limiting groove (61) of the bracket (6) and extends to above the sensing area (71) of the proximity switch (7).

8. The travel limit device of the sand suction machine according to claim 1, characterized in that: The position of the sensing area (71) on the proximity switch (7) is adjustable.

9. The travel limit device of the sand suction machine according to claim 1, characterized in that: The number of the driven gears is two.

10. The travel limit device of the sand suction machine according to claim 1, characterized in that: The entirety or the head of the sensing rod (51) is made of metal.

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