CN113973729B

CN113973729B - Pig limiting fence and pig driving method

Info

Publication number: CN113973729B
Application number: CN202111266999.0A
Authority: CN
Inventors: 陈力; 柴捷; 张廷焕; 龙熙; 吴平先; 张凤鸣; 张亮; 潘红梅; 涂志; 邱进杰; 闫志强
Original assignee: Chongqing Academy of Animal Sciences
Current assignee: Chongqing Academy of Animal Sciences
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-09-16
Anticipated expiration: 2041-10-28
Also published as: CN113973729A

Abstract

The invention provides a pig limiting fence and a pig catching method, wherein the pig limiting fence comprises a long guardrail, a short guardrail and a guardrail door, a pig catching mechanism is arranged at a position close to a trough (comprising an outer plate with a cavity is fixedly arranged on a rotating shaft, an inner plate is arranged in the cavity, two ends of the rotating shaft are connected to a top cross bar of the long guardrail through sliding parts, and the outer plate and the inner plate can move transversely after the sliding parts and/or the rotating shaft are subjected to transverse external force); the pig driving method comprises the following steps: opening the guardrail door and starting the control system; the motor II is controlled to rotate to enable the free end of the vertical plate to face the outlet of the limiting fence; controlling the outer plate to be turned to a vertically downward state; the nut seat is controlled to advance at the speed of 3-8 cm/s. The invention adopts a brand-new retreating type pig driving method (namely, the pigs are driven to retreat until leaving the limit fence), and in the pig driving process, the inner plate and the outer plate are similar to a wall with one surface moving slowly towards the fence door, so that the pigs retreat actively/automatically unconsciously.

Description

Pig limiting fence and pig driving method

Technical Field

The invention relates to the technical field of pig farm feeding equipment, in particular to a limiting fence for pigs and a pig driving method adopting the limiting fence.

Background

In the process of large-scale feeding of pigs, most pig farms adopt the limiting fences. For sows, sows in the non-farrowing stage basically live in the farrowing crate, sows in the farrowing stage live in the farrowing crate, so that the pregnant sows need to be transferred from the farrowing crate to the farrowing crate about one week before farrowing, and the first step is to expel the pregnant sows from the farrowing crate.

At present, no matter pigs are driven in an open area or in a limit fence, branches or pig driving devices are basically adopted for driving pigs. The common pig driving device is an electric shock type pig driving device which mainly comprises an operating handle, a connecting rod and an electric shock contact, wherein a small current generated after electrification is used for electrically shocking the pig through the electric shock contact so as to drive the pig to move forwards; some pig farms still use the most traditional approach to catch up pigs: the person cry out at the appropriate location and the pig is driven forward; the pig is flapped with branches or slats.

However, the existing pig-catching method has the following disadvantages: (1) the pig expelling process is time-consuming and labor-consuming, generally, a common person adopts a cry-out type pig expelling method to expel one pregnant sow from the limiting fence for about 3-5 minutes, and adopts a pig expelling device or a beating method to expel one pregnant sow from the limiting fence for about 1-2 minutes; for a large-scale pig farm, dozens of sows are driven out, the pig driving personnel are often very tired, and if the pigs are flapped by thin tree branches or battens, the pigs can be arched by guardrails, even the pig driving personnel are injured; moreover, the conventional electric shock type pig driving device is adopted, so that an operator is required to repeatedly adjust the position of an electric shock contact of the pig driving device for dozens of times; in some cases, the handheld pig blocking device is used, and workers need to enter each limit fence to operate when catching pigs, so that the operation is not smooth due to the narrow space in the fence, and the workers are easily injured; (2) stress is easily caused to the pigs in the process of expelling the pigs, and the pigs are easily turned around or hit the fence; (3) the difficulty of pig driving is high, particularly for a rear-open type limit fence (namely, a door of the limit fence is far away from a trough), an operator can only stand on the front side or right in front of the limit fence to drive pigs backwards, but the pigs have wider monocular vision (if the pigs are seen by one eye, the pigs can feel a wider range), so that the pigs can turn around forcibly in the pig driving process, and the pigs are difficult to drive smoothly; to open the spacing fence before (that is the door of at least one spacing fence is close to the trough), the drinking water bowl of arranging in the spacing fence, the trough still can seriously influence the pig only current, even arrange drinking water bowl, the trough on the guardrail door, consider conveniently to open the guardrail door, can only adopt the trough that the quality is lighter usually, the water supply line of connecting the drinking water bowl can only adopt the hose, and must reserve sufficient space outside the guardrail of trough front and back side, obviously, this has more than provided harsher requirement to the pig farm space, still can cause the pig only to abrade or even cause the trough to be extruded and warp.

Disclosure of Invention

The invention aims to provide a pig limiting fence with a simple structure and a good pig driving effect and a pig driving method adopting the limiting fence, which are at least used for solving the technical problems that the existing pig driving mode is time-consuming and labor-consuming, the pig driving difficulty is high, and the pig driving effect is poor.

In order to achieve the above object, the present invention adopts the following technical solutions.

A pig limiting fence comprises two rows of long guardrails arranged in parallel, wherein a short guardrail is arranged at the front end of each long guardrail, a guardrail door is arranged at the rear end of each long guardrail, a pig living space is defined by the long guardrails, the short guardrails and the guardrail doors together, and a feeding trough and a drinking bowl are arranged on the inner side of each short guardrail; the method is characterized in that: a pig driving mechanism is arranged at a position close to the trough; the pig driving mechanism comprises a rotating shaft, an outer plate with a cavity is fixedly arranged on the rotating shaft, the length of the outer plate is smaller than the width between two rows of long guardrails, an inner plate is arranged in the cavity, two ends of the rotating shaft are connected to a top cross rod of the long guardrail through sliding parts, and the outer plate and the inner plate can move transversely after the sliding parts and/or the rotating shaft are subjected to transverse external force; the rotating shaft is used as a reference, when the outer plate is turned to an obliquely downward or vertically downward state, the inner plate can extend downwards under the action of self gravity and slide to a limit position and then be limited, and when the outer plate is turned to an obliquely upward or vertically upward state, the inner plate can be completely retracted into the cavity under the action of self gravity and be limited.

In order to further improve the pig driving efficiency, when the outer plate is turned to a downward state, the bottom edge of the inner plate is close to the ground or the surface of the leaky floor. More preferably, the scheme is more practical when the outer plate is turned to the obliquely downward state, and particularly, the obliquely downward outer plate and the vertical plane form an included angle of 15-20 degrees, so that the subjective motility and the habit of the pigs are fully utilized in the pig driving process, and the scheme is not only suitable for driving big pigs (pigs with the age of more than 4 months), but also suitable for driving small pigs (pigs with the age of 1-4 months).

For stability and the life of improvement catch up with pig mechanism, the slider adopts the arc that can block on the top horizontal pole, is provided with the through-hole on the arc, is provided with the strip seam on long guardrail axially, adopts threaded countersunk head round pin subassembly cooperation through-hole and strip seam to radially spacing the arc.

In order to further improve the stability of the pig driving mechanism, the top cross rod is made of a steel pipe, the arc plate is made of a steel pipe with an axial notch, the inner diameter of the arc plate is equal to the outer diameter of the top cross rod, and the inner arc length of the arc plate is greater than 1/2 of the perimeter of the top cross rod.

For convenient use, the outer plate is provided with an electromagnet, the outer plate and the inner plate can be fixedly adsorbed in an electrified state, and the inner plate and the outer plate can move relatively in a non-electrified state.

For further improving efficiency of catching up with the pig, catch up with the pig mechanism still including the power device who is used for driving slider lateral motion, power device includes screw drive system, screw drive system's nut seat fixed connection slider, screw drive system's fixing base is connected on long guardrail, screw drive system's step motor is fixed on the stand of trough side, the pivot is connected to the output of the motor that sets up on the nut seat, only just then rotates when the output shaft of motor is rotated in the pivot.

In order to better prevent the pigs from turning around in the process of catching up the pigs and further reduce the difficulty of catching up the pigs, the vertical rotating shaft is arranged on the inner side of the long guardrail close to the guardrail door, the vertical plate is arranged on the vertical rotating shaft, the width of the vertical plate is 10-20cm smaller than the width between the two rows of long guardrails, the upper end of the vertical rotating shaft is connected with a second motor, and when the second motor drives the vertical rotating shaft to rotate, the vertical plate rotates along with the vertical rotating shaft.

In order to further reduce the difficulty of catching pigs, a plurality of copper contacts are further arranged on the surface of the inner plate, the top points of the copper contacts are 2-5mm higher than the surface of the inner plate, the copper contacts are connected with a power supply through power lines, and only small current which cannot cause damage to the pigs is generated and flows through the copper contacts after a circuit is conducted.

In order to further reduce the difficulty of pig driving and improve the efficiency of pig driving, the pig driving mechanism further comprises a control system, the control system comprises a memory, a processor and a program which is stored on the memory and can run on the processor, and the processor executes the program to realize the following steps/functions: controlling the opening and closing of each motor, and controlling the rotation of a lead screw transmission system through a stepping motor so that the nut seat can move forward or backward at the speed of 3-8 cm/s; the rotating shaft is controlled to rotate through the first motor, so that the outer plate can rotate at the speed of 5-20 degrees/s; the circuit of control copper contact and power switches on, makes the copper contact discharge after contacting pig skin, the circular telegram of control electro-magnet and outage.

The invention discloses a pig catching method adopting the pig limiting fence, which is characterized by comprising the following steps:

step 1, opening a guardrail door and starting a control system;

step 2, controlling a second motor to rotate by a preset angle, enabling the free end of the vertical plate to face the outlet of the limiting fence, and enabling the included angle between the vertical plate and the long guardrail where the vertical plate is located to be 25-35 degrees;

step 3, firstly controlling the electromagnet to be electrified, then controlling the motor to operate according to a preset program, turning the outer plate to a vertically downward state, and then controlling the electromagnet to be powered off;

step 4, controlling the stepping motor to operate according to a preset program, and enabling the nut seat to advance at the speed of 3-8 cm/s; in the process, the motor II is controlled to operate according to a preset program, so that the outer plate is turned clockwise at the speed of 5 degrees/s until the outer plate is turned to form an included angle of 15-45 degrees with the vertical plane;

step 5, after the nut seat moves forward to the extreme position, sequentially: the vertical plate is controlled to reset, the nut seat is controlled to retreat and reset, and the outer plate is controlled to be turned to a vertically upward state.

And 6, closing the guardrail door and closing the control system.

Has the advantages that: the invention adopts a brand-new retreating type pig driving method (namely, the pigs are driven to retreat until leaving the limit fence), and in the pig driving process, the inner plate and the outer plate are similar to an inclined wall moving slowly towards the guardrail door, so that the pigs can retreat actively/automatically unconsciously and leave the living area for a long time; by adopting the scheme of the invention, the labor intensity of the pig expelling personnel is greatly reduced, the skin of the pig does not need to be touched or tapped by the operator repeatedly and actively for dozens of times, the operation on the side or the front of the limit fence is also not needed, the function of manually expelling the pig is realized, the pig expelling efficiency is high, less than 40 seconds are consumed for expelling one pregnant sow from the limit fence under the condition of ensuring that the pig runs and collides disorderly, more importantly, the subjective motility and the habit of the pig are fully utilized in the pig expelling process, the stress on the pig is completely avoided, the pig expelling process is easy and smooth, the problems of bumping the guard rail, turning and being injured by the pig are avoided, and the pig expelling effect is good; the invention skillfully integrates the traditional limit fence and the pig catching mechanism on the basis of not influencing a feed conveying and feeding system, has the advantages of simple structure, small occupied space and the like, is suitable for a rear-open limit fence and a double-open limit fence, and is particularly suitable for occasions with obstacles in front of troughs of the rear-open limit fence and the limit fence.

Drawings

FIG. 1 is a schematic view of a pig restraint bar in example 1, in an initial state;

FIG. 2 is a partial schematic view of a long guard rail of the pig restraint rail of the embodiment;

FIG. 3 is a schematic view of a pig restraint fence according to example 1, in a state where the outer panel is in a turning-over state, in which the electromagnet 106 is energized;

FIG. 4 is a schematic view of the pig restraint fence according to embodiments 1 and 3, wherein the outer plate is in a vertically downward state during the pig-catching process, and the electromagnet 106 is powered off;

FIG. 5 is a schematic view of a pig restraint fence in example 1, in which the outer panel is inclined downward during the pig-repelling process;

fig. 6 is a schematic view of the pig restraint fence in example 2, with the outer panel turned vertically downward.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the following embodiments are only used for understanding the principle of the present invention and the core idea thereof, and do not limit the scope of the present invention. It should be noted that modifications to the invention as described herein, which do not depart from the principles of the invention, are intended to be within the scope of the claims which follow.

Example 1

As shown in fig. 1 and fig. 2, a pig fence, fence length is 2 meters, the width is 0.6 meter, including two rows of parallel arrangement's long guardrail 1, be provided with short guardrail 2 at 1 front end of long guardrail, be provided with guardrail door 3 at 1 rear end of long guardrail, enclose into pig living space jointly by long guardrail 1, short guardrail 2 and guardrail door 3, be provided with trough 5 and drinking water bowl 4 in 2 inboard short guardrails. A pig driving mechanism is arranged at a position close to the feeding trough 5; the pig driving mechanism comprises a rotating shaft 100, an outer plate 101 with a cavity is fixedly arranged on the rotating shaft 100, the length of the outer plate 101 is smaller than the width between two rows of long guardrails 1, an inner plate 102 is arranged in the cavity, two ends of the rotating shaft 100 are connected to a top cross bar 11 of the long guardrails 1 through sliding parts 103, and the outer plate 101 and the inner plate 102 can move transversely after the sliding parts 103 or the rotating shaft 100 are subjected to transverse external force; with the rotating shaft 100 as a reference, when the outer panel 101 is turned to a state of being inclined downward or vertically downward, the inner panel 102 can be extended downward under the action of its own weight and slid to a limit position and then limited, and when the outer panel 101 is turned to a state of being inclined upward or vertically upward, the inner panel 102 can be retracted into the cavity completely under the action of its own weight and limited. In one of the structures, sliding grooves are formed in two opposite sides of an inner cavity of the outer plate 101, limiting platforms are respectively arranged at the top and the bottom of the sliding grooves, protrusions are respectively arranged on two opposite sides of the inner plate 102 along the top, and after the protrusions of the inner plate 102 are hung and buckled on the limiting platforms in the inner cavity of the outer plate 101, the inner plate 102 is limited.

In this embodiment, when the outer panel 101 is turned to a vertically downward state, the bottom edge of the inner panel 102 is close to the ground or the surface of the leaky floor, and the distance between the bottom edge of the inner panel 102 and the ground or the surface of the leaky floor is 5-15cm, preferably 10 cm.

In this embodiment, the sliding member 103 is an arc plate that can be clamped on the top rail 11, a through hole is provided on the arc plate, a strip-shaped slit 12 is axially provided on the long guardrail 1, and a countersunk head pin assembly 105 with threads is adopted to match the through hole and the strip-shaped slit 12, so as to radially limit the arc plate. Specifically, the method comprises the following steps: the top cross rod 11 adopts the stainless steel pipe, and the arc adopts the steel pipe that has the axial breach, is about to the steel pipe along axial direction cut off part formation can block the bar seam 12 of countersunk head round pin subassembly 105, and the cap edge card of countersunk head round pin subassembly 105 is at top cross rod 11 inner chamber (lumen) wall, countersunk head round pin subassembly 105's nut card in the slider 103 outer wall, and the arc internal diameter equals top cross rod 11 external diameter, and the arc length is greater than 1/2 of top cross rod 11 girth in the arc. With this structure, the sliding member 103 can move axially along the top rail 11 by an external axial force, but cannot move radially by an external radial force. The axial direction and the radial direction refer to the axial direction and the radial direction of the top cross bar 11.

In this embodiment, the electromagnet 106 is provided on the outer panel 101, and the outer panel 101 and the inner panel 102 can be attracted and fixed together in an energized state, and in this state, as shown in fig. 3, when the outer panel 101 is turned over downward, the inner panel 102 does not protrude downward; in a non-energized state, the inner plate 102 and the outer plate 101 can move relatively, and in this state, as shown in fig. 4, when the outer plate 101 is turned to a state of being inclined downward or vertically downward, the inner plate 102 extends downward under the action of its own weight until the inner plate 102 falls to a limit position and is then locked.

In this embodiment, the pig catching mechanism further comprises a power device for driving the sliding part 103 to move transversely, the power device comprises a lead screw transmission system, a nut seat 107 of the lead screw transmission system is fixedly connected with the sliding part 103, a fixed seat 108 of the lead screw transmission system is connected to the long guardrail 1, a stepping motor 114 of the lead screw transmission system is fixed on the upright post 13 at the side of the trough 5 through the fixed seat 108, that is, the fixed seat 108 is fixed on the upright post 13, and the stepping motor 114 is installed on the fixed seat 108; the output end of a first motor 109 arranged on the nut seat 107 is connected with the rotating shaft 100, when the output shaft of the first motor 109 rotates, the rotating shaft 100 rotates, and the stepping motor 114 adopts a servo stepping motor.

In this embodiment, a vertical rotating shaft 110 is disposed on the inner side of the long guardrail 1 close to the guardrail door 3, a vertical plate 111 is disposed on the vertical rotating shaft 110, the width of the vertical plate 111 is 10-20cm smaller than the width between the two rows of long guardrails 1, the upper end of the vertical rotating shaft 110 is connected to a second motor 112, and when the second motor 112 drives the vertical rotating shaft 110 to rotate, the vertical plate 111 rotates along with the vertical rotating shaft 110.

In this embodiment, the pig catching mechanism further includes a control system, the control system includes a memory, a processor, and a program stored in the memory and capable of being executed on the processor, and the processor implements the following steps/functions when executing the program: the opening and closing of each motor are controlled, and a lead screw 116 of a lead screw transmission system is controlled to rotate through a stepping motor 114, so that the nut seat 107 can move forwards or backwards at the speed of 3-8 cm/s; the rotating shaft 100 is controlled to rotate through the first motor 109, so that the outer plate 101 can rotate at the speed of 5-20 degrees/s; controlling the energization and de-energization of the electromagnet 106.

A pig catching method adopting the pig restraint fence in the embodiment comprises the following steps:

step 1, (in an initial state, the state of the limit fence is shown in figure 1), when in use, a fence door 3 is opened, and a control system is started;

step 2, controlling the second motor 112 to rotate by a preset angle, so that the free end of the vertical plate 111 faces the outlet of the limit fence, and the included angle between the vertical plate 111 and the long fence 1 where the vertical plate 111 is located is 30 degrees, wherein the state at this time is shown in fig. 3-5;

step 3, firstly controlling the electromagnet 106 to be electrified, then controlling the first motor 109 to operate according to a preset program, enabling the outer plate 101 to be turned to a vertically downward state (namely, controlling the rotating shaft 110 to rotate 180 degrees through the first motor 109), then controlling the electromagnet 106 to be powered off, and enabling the inner plate 102 to extend downwards at the moment when the position limiting fence state is shown in fig. 4;

step 4, controlling the stepping motor 114 to operate according to a preset program, and enabling the nut seat 107 to advance at the speed of 4 cm/s; in the process, the motor II 112 is controlled to operate according to a preset program, so that the outer plate 101 is turned clockwise at a speed of 5 degrees/s until the outer plate 101 is turned to form an included angle of 20 degrees with the vertical plane, the outer plate 101 and the inner plate 102 are kept in a downward inclined state all the time, namely the nut seat 107 moves forward at a speed of 4cm/s while the outer plate 101 rotates clockwise, the state of the limiting fence is shown in FIG. 5, and the direction shown by an arrow in the figure shows the moving direction of the outer plate 101, namely the pig catching direction;

step 5, after the nut seat 107 moves forward to the extreme position, sequentially: the control vertical plate 111 resets, the control nut seat 107 retreats and resets, and the control outer plate 101 is turned over to a vertically upward state;

and 6, closing the guardrail door 3, closing the control system, and returning the limiting guardrail to the initial state shown in the figure 1.

When the pigsty driving device is used, in the process of driving pigs, the inner plate 102 and the outer plate 101 are integrally similar to an inclined wall moving slowly towards the guardrail door 3, so that the pigs can retreat actively/automatically unconsciously and leave a living area for a long time smoothly, and even if the pigs just start to stop moving, the heads of the pigs can be slightly lifted by the movable inner plate 102 and the movable outer plate 101, so that the pigs can retreat as soon as possible; the scheme not only greatly reduces the labor intensity of the pig driving personnel, does not need to repeatedly and actively touch or tap the skin of the pig for dozens of times by an operator, does not need to operate the side or the front of the limit fence, realizes the function of not needing to manually drive the pig, has high pig driving efficiency, can drive one pregnant sow out of the limit fence for less than 40 seconds under the condition of ensuring that the pig runs and collides disorderly, but also more critically fully utilizes the subjective motility and the habit of the pig in the pig driving process, can not cause stress to the pig, has easy and smooth pig driving process, and does not have the problems of bumping the guardrail, turning around, turning and being injured by the pig; this kind of scheme is on the basis that does not influence fodder and carry, throw the feeding system, and with traditional farrowing crate and catch up with pig mechanism ingeniously and combine together, still has advantages such as simple structure, occupation space are little, is applicable to open farrowing crate and double open type farrowing crate in the back, is particularly useful for the back to open farrowing crate and the manger place the place that has the barrier in the place ahead of the farrowing crate.

Example 2

A pig restraint fence, referring to example 1 and shown in fig. 6, the main difference from example 1 is: the surface of the inner plate 102 is further provided with a plurality of copper contacts 113, a control system of the pig driving mechanism is further used for controlling the circuit conduction of the copper contacts 113 and a power supply, so that the copper contacts 113 can discharge after contacting the skin of a pig (the discharge principle is the prior art, and the principle of the handheld pig driving device can be specifically referred to, and is not described herein), the vertex of each copper contact 113 is 2-5mm higher than the surface of the inner plate 102, the copper contacts 113 are connected with the power supply through a power line, and after the circuit conduction, only a small current which cannot cause damage to the pig is generated and flows through the copper contacts 113. In the process of driving pigs (in step 4 of the foregoing embodiment 1), the power supply connected to the copper contact 113 is turned on, and as the inner plate 102 and the outer plate 101 move, when the copper contact 113 touches the skin of a pig, the pig is slightly shocked by the copper contact 113, so that the pig is further driven to rapidly move back. The limiting fence in the embodiment is mainly applied to the occasions that the fattening pigs are out of the fence, the sows with violent spleen qi are transferred and the pigs are driven forward from the tails of the pigs.

In other embodiments, the advancing speed of the nut seat 107 can be selectively set within the range of 3-8cm/s, the included angle between the upright plate 111 and the long guardrail 1 on which the upright plate 11 is positioned can be selectively set within the range of 25-35 degrees, and the included angle between the outer plate 101 which is inclined downwards and the vertical surface can be selectively set within the range of 15-45 degrees.

Example 3

A method for catching pigs using the pig containment boom of example 1, comprising the steps of:

step 2, controlling the second motor 112 to rotate by a preset angle, enabling the free end of the vertical plate 111 to face the outlet of the limit fence, and enabling the included angle between the vertical plate 111 and the long guardrail 1 where the vertical plate 111 is located to be 25 degrees;

step 3, firstly controlling the electromagnet 106 to be electrified, then controlling the first motor 109 to operate according to a preset program, turning the outer plate 101 to a vertically downward state (namely, controlling the rotating shaft 110 to rotate 180 degrees through the first motor 109), and then controlling the electromagnet 106 to be powered off, wherein the state of the limit fence at the moment is shown in fig. 4;

step 4, controlling the stepping motor 114 to operate according to a preset program, and enabling the nut seat 107 to advance at the speed of 8 cm/s; the state of the stopper at this time is shown in fig. 4, and the direction indicated by the arrow in the figure indicates the moving direction of the outer panel 101, that is, the pig catching direction;

step 5, after the nut seat 107 moves forward to the extreme position, sequentially: the vertical plate 111 is controlled to reset, the nut seat 107 is controlled to retreat and reset, and the outer plate 101 is controlled to turn over to be in a vertical upward state;

Claims

1. A pig spacing fence comprises two rows of long guardrails (1) which are arranged in parallel, wherein a short guardrail (2) is arranged at the front end of each long guardrail (1), a guardrail door (3) is arranged at the rear end of each long guardrail (1), a pig living space is defined by the long guardrails (1), the short guardrails (2) and the guardrail doors (3), and a trough (5) and a drinking bowl (4) are arranged on the inner side of each short guardrail (2); the method is characterized in that: a pig driving mechanism is arranged at a position close to the feeding trough (5); the pig driving mechanism comprises a rotating shaft (100), an outer plate (101) with a cavity is fixedly arranged on the rotating shaft (100), the length of the outer plate (101) is smaller than the width between two rows of long guardrails (1), an inner plate (102) is arranged in the cavity, two ends of the rotating shaft (100) are connected to a top cross rod (11) of each long guardrail (1) through sliding parts (103), and the outer plate (101) and the inner plate (102) can move transversely after the sliding parts (103) and/or the rotating shaft (100) are subjected to transverse external force; by taking the rotating shaft (100) as a reference, when the outer plate (101) is turned to be in an obliquely downward or vertically downward state, the inner plate (102) can extend downwards under the action of self gravity and is limited after sliding to a limit position, and when the outer plate (101) is turned to be in an obliquely upward or vertically upward state, the inner plate (102) can be completely retracted into the cavity under the action of self gravity and is limited; an electromagnet (106) is provided on the outer panel (101), and the outer panel (101) and the inner panel (102) can be attracted and fixed together in an energized state, and the inner panel (102) and the outer panel (101) can move relative to each other in a non-energized state.

2. The pig restraint fence of claim 1, wherein: when the outer plate (101) is turned to a downward state, the bottom edge of the inner plate (102) is close to the ground or the surface of the leaky floor.

3. The pig restraint fence of claim 2, wherein: the sliding part (103) adopts an arc-shaped plate which can be clamped on the top cross rod (11), a through hole is formed in the arc-shaped plate, a strip-shaped seam (12) is axially arranged on the long guardrail (1), and a threaded countersunk head pin assembly (105) is matched with the through hole and the strip-shaped seam (12) to radially limit the arc-shaped plate.

4. The pig restraint fence of claim 3, wherein: the top cross rod (11) is made of a steel pipe, the arc-shaped plate is made of a steel pipe with an axial gap, the inner diameter of the arc-shaped plate is equal to the outer diameter of the top cross rod (11), and the inner arc length of the arc-shaped plate is greater than 1/2 of the perimeter of the top cross rod (11).

5. The pig restraint fence according to any one of claims 1-4, characterized in that: the pig catching mechanism further comprises a power device used for driving the sliding part (103) to move transversely, the power device comprises a lead screw transmission system, a nut seat (107) of the lead screw transmission system is fixedly connected with the sliding part (103), a fixing seat (108) of the lead screw transmission system is connected to the long guardrail (1), a stepping motor (114) of the lead screw transmission system is fixed to an upright post (13) on the side of the trough (5), and an output end of a motor I (109) arranged on the nut seat (107) is connected with the rotating shaft (100).

6. The pig restraint fence according to claim 5, characterized in that: the inner side of the long guardrail (1) close to the guardrail door (3) is provided with a vertical rotating shaft (110), the vertical rotating shaft (110) is provided with a vertical plate (111), the width of the vertical plate (111) is 10-20cm smaller than the width between two rows of the long guardrails (1), the upper end of the vertical rotating shaft (110) is connected with a second motor (112), and when the second motor (112) drives the vertical rotating shaft (110) to rotate, the vertical plate (111) rotates along with the vertical rotating shaft (110).

7. The pig restraint fence of claim 6, wherein: the surface of the inner plate (102) is also provided with a plurality of copper contacts (113), the top points of the copper contacts (113) are 2-5mm higher than the surface of the inner plate (102), the copper contacts (113) are connected with a power supply through a power line, and after a circuit is conducted, only tiny current which cannot cause damage to pigs is generated and flows through the copper contacts (113).

8. The pig restraint fence of claim 7, wherein: the pig driving mechanism further comprises a control system, the control system comprises a memory, a processor and a program which is stored on the memory and can run on the processor, and the processor executes the program to realize the following steps/functions: the opening and closing of each motor are controlled, and a lead screw (116) of a lead screw transmission system is controlled to rotate through a stepping motor (114), so that the nut seat (107) can move forwards or backwards at the speed of 3-8 cm/s; the rotating shaft (100) is controlled to rotate through the motor I (109), so that the outer plate (101) can rotate at the speed of 5-20 degrees/s; the copper contact (113) is controlled to be conducted with a circuit of a power supply, so that the copper contact (113) can discharge electricity after contacting the skin of the pig, and the electromagnet (106) is controlled to be powered on or off.

9. A method for catching pigs using the pig containment boom of claim 8, comprising the steps of:

step 1, opening a guardrail door (3) and starting a control system;

step 2, controlling a second motor (112) to rotate by a preset angle, enabling the free end of the vertical plate (111) to face the outlet of the limiting fence, and enabling the included angle between the vertical plate (111) and the long guardrail (1) where the vertical plate (111) is located to be 25-35 degrees;

step 3, firstly controlling the electromagnet (106) to be electrified, then controlling the motor I (109) to operate according to a preset program, enabling the outer plate (101) to be turned to a vertically downward state, and then controlling the electromagnet (106) to be powered off;

step 4, controlling the stepping motor (114) to operate according to a preset program, and enabling the nut seat (107) to advance at the speed of 3-8 cm/s; in the process, the motor II (112) is controlled to operate according to a preset program, so that the outer plate (101) is turned clockwise at the speed of 5 degrees/s until the outer plate (101) is turned to form an included angle of 15-45 degrees with the vertical plane;

step 5, after the nut seat (107) moves forward to the extreme position, sequentially: the vertical plate (111) is controlled to reset, the nut seat (107) is controlled to retreat and reset, and the outer plate (101) is controlled to turn over to a vertically upward state;

and 6, closing the guardrail door (3) and closing the control system.