Gate opening degree limiting device

Abstract

The utility model relates to a gate opening degree limiting device, which belongs to the field of gate opening degree control, and is characterized in that a screw rod is horizontally and rotatably arranged in a box body, and one end of the screw rod extends out of the box body and is connected with a gear; the first guide rod and the screw rod are arranged in parallel at an interval; the sliding block is slidably arranged on the first guide rod and is in threaded connection with the screw rod; the second screw rod is provided with a polished rod section and a threaded section, is rotationally arranged in the box body and is parallel to the screw rod at an interval; the second guide rod is arranged in the box body and is parallel to the second screw rod at an interval; wherein one limiting switch is connected to the second guide rod and sleeves the periphery of the corresponding polished rod section of the second screw rod, and the other limiting switch is slidably arranged on the second guide rod and is in threaded connection with the threaded section of the second screw rod. The position is not easy to change when the gate is interfered by the outside, and meanwhile, the gate can be fixed at any position, so that the adjusting range of the gate is expanded.

Description

Technical Field

[0001] The utility model relates to the field of gate opening control, in particular to a gate opening limiting device. Background Art

[0002] The gate is a control facility in the water interception and release channel, and is an important component widely used in large pumping stations and dams. The winch gate is a widely used driving structure, which uses a drum to wind a wire rope to drive the pulley to lift and achieve the purpose of gate opening and closing. In order to grasp the gate opening, the prior art generally sets an opening meter on the winch gate hoist. The existing opening meter uses an encoder to collect the number of rotations of the winch in real time to determine the gate opening. The existing gear transmission drives the screw rod to rotate, thereby driving the slider to touch the limit switch on both sides to achieve the purpose of gate opening limit. However, the current limit switch that controls the gate opening is generally tightened on the fixed rod by a stud in order to facilitate the change of the position of the limit switch. There are also some, such as disclosed in patent CN212270855U, that are arranged on the slide tube at intervals. The limit switch is pressed into the limit slot by an elastic member and a limit block to fix it. However, this method cannot fix the limit switch at any position, and can only achieve the change of the position interval point when it is moved to the limit groove, which reduces the gate opening limit range of the limit switch. In addition, the above-mentioned limit switch has poor fixing effect. When it is disturbed by external factors, especially when it vibrates due to external forces, the position of the limit switch is prone to change, affecting the control of the gate opening. Utility Model Content

[0003] The position movement of the limit switch in the existing gate opening limit device is generally achieved by tightening the stud or pressing the limit block to cooperate with the limit groove. No matter which method is used, the fixing effect is poor, especially when it is vibrated by external interference or external force, the position of the limit switch is easy to change, affecting the control of the gate opening, and the position change in the method of the above patent can only be adjusted at intervals, which greatly reduces the gate opening limit range of the limit switch. The present application is a gate opening limit device, which can solve the problem in at least one aspect or one purpose. The specific technical solution adopted is:

[0004] A gate opening limiting device, comprising:

[0005] A box body, a screw rod is horizontally and rotatably arranged inside the box body, one end of the screw rod extends out of the box body and is connected to a gear;

[0006] A first guide rod, which is disposed in the box body and is parallel to and spaced from the screw rod;

[0007] A slider, which is slidably disposed on the first guide rod and is threadedly connected to the screw rod;

[0008] A second screw rod, the second screw rod having a smooth rod section and a threaded section, the second screw rod being rotatably disposed in the box body and being spaced apart from and parallel to the screw rod, the second screw rod extending out of the box body at one end close to the threaded section and being connected to a handle;

[0009] A second guide rod, which is disposed in the box body and is parallel to and spaced from the second screw rod;

[0010] Two limit switches, one of which is connected to the second guide rod and is sleeved on the periphery of the second screw rod corresponding to the bare rod segment, and the other limit switch is slidably arranged on the second guide rod and is threadedly connected to the threaded segment of the second screw rod.

[0011] Preferably, it further comprises a first ruler, which is close to the second screw rod and arranged parallel to the second screw rod.

[0012] Preferably, the limit switch slidably disposed on the second guide rod is threadedly connected to the threaded section of the second screw rod through a threaded block.

[0013] Preferably, a first pointer is also provided on the threaded block, the threaded block is in a cube shape, the first pointer and the limit switch are arranged on two symmetrical side surfaces of the threaded block, the first scale is located on the side where the first pointer is located, and the screw rod and the slider thereon are located on the side where the limit switch is located.

[0014] Preferably, a second pointer is provided on the slider, and a second scale is provided on the side of the screw opposite to the limit switch, the second pointer points to the side where the second scale is located, and the zero scale position of the second scale is aligned with the limit switch fixedly set on the second guide rod.

[0015] Preferably, the box body is made of transparent acrylic plastic material.

[0016] Preferably, the box body comprises an upper cover and a frame body, the upper cover is engaged with the frame body, and one edge of the upper cover is provided with an extended ear plate for opening and closing.

[0017] The utility model can fix one of the limit switches (the upper limit switch in most cases) at any position through the above scheme, and adjust and fix the arbitrary position through the screw rod, which not only has a high firmness effect, but also is not easy to change the position when subjected to external interference. At the same time, it can be fixed at any position to expand the range of gate adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the utility model;

[0019] Figure 2 It is a top view of the utility model.

[0020] In the figure, 1, box body, 101, frame body, 102, upper cover, 2, first guide rod, 3, screw rod, 4, second scale, 5, slider, 6, second guide rod, 7, second screw rod, 701, bare rod section, 702, threaded section, 8, threaded block, 9, limit switch, 10, first pointer, 11, first scale, 12, handle, 13, gear, 14, extension ear plate, 15, second pointer. DETAILED DESCRIPTION

[0021] In order to clearly illustrate the technical features of the present invention, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0022] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] like Figure 1-2 As shown, a gate opening limiting device includes a rectangular box 1, a first guide rod 2, a slider 5, a second screw 7, a second guide rod 6 and two limit switches 9.

[0024] Among them, a screw rod 3 is horizontally arranged in the box body 1 and rotates in the left and right directions. The right end of the screw rod 3 extends out of the box body 1 and is connected to a gear 13. The gear 13 here is a bevel gear, which meshes with the bevel gear on the output shaft of the winch. The bevel gear here is selected according to the calculated speed ratio. The speed of the output shaft of the winch is transmitted to the screw rod 3 at a specific speed, so that different openings of the gate just correspond to the position of the slider 5 on the screw rod 3. When the slider 5 moves to the two limit switches 9, the gate just corresponds to its minimum and maximum openings.

[0025] The above-mentioned first guide rod 2 is arranged in the box body 1 in the left and right direction, and the first guide rod 2 is horizontally arranged parallel to the screw rod 3 and is located directly above the screw rod 3. The slider 5 is also arranged between the screw rod 3 and the first guide rod 2. Specifically, the slider 5 is sleeved on the first guide rod 2 and can slide relative to the first guide rod 2. At the same time, the slider 5 is also threadedly connected to the screw rod 3. The rotation of the screw rod 3 causes the slider 5 to move left and right.

[0026] In addition to the above-mentioned components, the present application also includes a second screw rod 7, which is also rotatable in the left and right directions in the box body 1. The second screw rod 7 is parallel to the screw rod 3 and is located on the front side of the screw rod 3. The second screw rod 7 has a smooth rod section 701 and a threaded section 702. In this embodiment, the smooth rod section 701 is located on the left side and the threaded section 702 is located on the right side. The right end of the second screw rod 7 extends out of the box body 1 and is connected to a handle 12. The handle 12 is for a person to hold it by hand, and then the second screw rod 7 is manually rotated.

[0027] The above-mentioned second guide rod 6 is still arranged in the box body 1 in the left and right direction. The second guide rod 6 is parallel to the second screw rod 7 and is located directly above the second screw rod 7. Two limit switches 9 are connected to the second guide rod 6 and the second screw rod 7 at the same time. The two limit switches 9 here are a lower limit switch 9 and an upper limit switch 9. The lower limit switch 9 is connected to the second guide rod 6 and is sleeved on the outer periphery of the second screw rod section 701, so that the rotation of the second screw rod 7 will produce relative rotation with the lower limit switch 9, and the upper limit switch 9 is slidably connected to the second guide rod 6. At the same time, the upper limit switch 9 is threadedly connected to the threaded section 702 of the second screw rod 7, so that when the second screw 7 rotates, it will drive the upper limit switch 9 to move left and right, thereby changing the position of the upper limit switch 9 in turn to achieve adjustment of the maximum opening of the gate.

[0028] Furthermore, it also includes a first scale 11, which is close to the second screw rod 7 and is arranged in parallel with the second screw rod 7. When the gate opening limit is measured, the power from the winch output shaft causes the screw rod 3 to rotate, driving the slider 5 to rotate. When the slider 5 moves to the two limit switches 9, the first scale 11 will mark the position of the slider 5. At this time, the gate opening can be measured, and the upper limit of the gate opening can be adjusted by adjusting the positions of the two limit switches 9, especially the position of the upper limit switch 9.

[0029] Furthermore, the limit switch 9 slidably arranged on the second guide rod 6 is threadedly connected to the threaded segment 702 of the second screw rod 7 through the threaded block 8, and the limit switch 9 is fixed to the threaded block 8 by screws. The threaded block 8 and the limit switch 9 are connected separately. When the limit switch 9 fails, the limit switch 9 can be replaced separately, and the threaded block 8 can continue to be used.

[0030] Furthermore, in order to read the adjustment position of the limit block more accurately, a first pointer 10 is also provided on the threaded block 8. The threaded block 8 is in a cube shape. The first pointer 10 and the limit switch 9 are arranged on the front and rear sides symmetrically of the threaded block 8. In the present embodiment, the first pointer 10 is located on the front side of the threaded block 8, the limit switch 9 is located on the rear side of the threaded block 8, the first scale 11 is located on the side where the first pointer 10 is located, and the above-mentioned screw 3 and the slider 5 thereon are located on the side where the limit switch 9 is located, so that the two can reasonably utilize the space in the box body 1 without interfering with each other.

[0031] Furthermore, a second pointer 15 is provided on the slider 5, and a second scale 4 is provided on the rear side of the screw rod 3. The second pointer 15 points to the side where the second scale 4 is located. The zero scale position of the second scale 4 is aligned with the limit switch 9 fixedly arranged on the second guide rod 6. The second scale 4 can indicate the moving position of the slider 5. In this way, when the slider 5 does not stay at the position of the limit switch 9, the height of the gate can be calculated by the position of the second pointer 15.

[0032] Furthermore, in order to facilitate observation of displayed data and reading of values, the box body 1 is preferably made of acrylic transparent plastic material. The transparent plastic material has high toughness and is more impact-resistant than transparent glass.

[0033] Furthermore, the box body 1 has an upper cover 102 and a frame body 101. The upper cover 102 is engaged with the frame body 101. One edge of the upper cover 102 is provided with an extended ear plate 14 for opening and closing. The upper cover 102 can be disassembled from the frame body 101, so that internal parts can be easily replaced or repaired.

[0034] The above-mentioned specific implementation manner cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any replacement, improvement or change made to the implementation manner of the present utility model falls within the protection scope of the present utility model.

[0035] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A gate opening limit device, characterized in that: include: A box body, wherein a screw is horizontally and rotatably arranged in the box body, and one end of the screw is extended out of the box body and connected to a gear; A first guide rod, which is disposed in the box body and is parallel to and spaced from the screw rod; A slider, the slider is slidably disposed on the first guide rod and is threadedly connected to the screw rod; A second screw, the second screw having a smooth rod section and a threaded section, the second screw being rotatably disposed in the box body and being spaced apart from and parallel to the screw, the second screw extending out of the box body at one end close to the threaded section and being connected to a handle; A second guide rod, the second guide rod is disposed in the box body and is parallel to and spaced from the second screw rod; Two limit switches, one of which is connected to the second guide rod and is simultaneously sleeved on the periphery of the second screw rod corresponding to the bare rod segment, and the other limit switch is slidably arranged on the second guide rod and is simultaneously threadedly connected to the threaded segment of the second screw rod.

2. A gate opening limit device according to claim 1, characterized in that: The invention also includes a first scale, which is close to the second screw rod and arranged in parallel with the second screw rod.

3. A gate opening limit device according to claim 2, characterized in that: The limit switch slidably arranged on the second guide rod is threadedly connected to the threaded section of the second screw rod through a threaded block.

4. A gate opening limit device according to claim 3, characterized in that: The threaded block is also provided with a first pointer, and the threaded block is in the shape of a cube. The first pointer and the limit switch are arranged on two symmetrical side surfaces of the threaded block, the first scale is located on the side where the first pointer is located, and the screw rod and the slider thereon are located on the side where the limit switch is located.

5. A gate opening limiting device according to claim 1, characterized in that: The slider is provided with a second pointer, and the screw is provided with a second scale on the side opposite to the limit switch, the second pointer points to the side where the second scale is located, and the zero scale position of the second scale is aligned with the limit switch fixedly set on the second guide rod.

6. A gate opening limit device according to claim 1, characterized in that: The box body is made of transparent acrylic plastic.

7. A gate opening limiting device according to claim 1 or 6, characterized in that: The box body comprises an upper cover and a frame body, wherein the upper cover is engaged with the frame body, and an extending ear plate is arranged on one edge of the upper cover for opening and closing.

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