Automatic clamping and uncovering device for pulverized coal sampling test bottle

Abstract

The invention provides a pulverized coal sampling test bottle automatic clamping and uncovering device which comprises a base, a pushing arc-shaped clamping seat, a fixed arc-shaped clamping seat, a cavity support and an up-down sliding cavity, an uncovering device is arranged at the bottom of the up-down sliding cavity, the pushing arc-shaped clamping seat is arranged on one side of the base, and the cavity support is arranged on the other side of the base. The fixed arc-shaped clamping base is installed at the bottom of the cavity support and faces the pushing arc-shaped clamping base. The up-down sliding cavity is connected to the cavity support in an up-down sliding mode, and the up-down sliding cavity is located above the fixed arc-shaped clamping base. According to the automatic cover opening device, the automatic cover opening function of the pulverized coal sampling test bottle can be achieved, automatic cover opening of the pulverized coal sampling test bottle is achieved, and the manual participation degree in the detection process is reduced. The bottle body can be kept completely immovable in the uncapping process, meanwhile, appropriate pressure is applied to the bottle cap, the bottle cap can be correctly opened, the whole device is high in automation degree, and the subsequent uncapping procedure can be completed only by placing the pulverized coal sampling test bottle at a preset position.

Description

Technical Field

[0001] The invention belongs to the field of coal powder detection equipment, and in particular relates to an automatic clamping and opening device for a coal powder sampling and testing bottle. Background Art

[0002] Thermal power plants, also known as thermal power plants for short, are factories that use coal and other combustibles as fuel to produce electricity. The power generation process uses fuel to heat water to generate steam when it is burned, converting the thermal energy of the fuel into steam energy. The pressure generated by the steam drives the turbine to rotate, converting the steam energy into mechanical energy, and then the turbine drives the generator to rotate, converting the mechanical energy into electrical energy. For thermal power plants, the demand for fuel is very large, and pulverized coal, as a common fuel for thermal power plants, is used in huge quantities. The combustion effect of pulverized coal can directly affect the power generation efficiency. Power plants need to purchase high-quality coal for power generation, and the quality of pulverized coal also needs to be strictly controlled. After the coal enters the power plant, it must first be sampled and tested. The combustion kcal in the test index will serve as a crucial basis for coal source settlement funds.

[0003] Coal powder sampling and testing bottles are special bottles used to store coal samples for testing. Power plants need to sample hundreds of coal-transporting vehicles every day. The coal of each vehicle is sampled at more than three sampling points. In addition to the sampling of coal from trains, the daily sampling volume of coal powder can reach about 300 sampling bottles. The coal powder sampling and testing bottles currently used are made of thickened hard plastic, with a round bottle body structure of 150mm in height and 150mm in diameter. When opening the bottle cap during use, it is necessary to stabilize the bottle body first, apply a large pressure to the bottle cap, and then rotate it counterclockwise to open the bottle cap, so manual operation is adopted.

[0004] During the testing process, due to the requirements of inspection and testing rules and regulations, it is necessary to reduce manual participation as much as possible and reduce the impact of manual labor on the test results during the testing process. The utility model patent applied by the applicant is "A clamping device suitable for coal powder sampling bottles", with application number 202321991468.2. It can be used to clamp the bottle body when opening the bottle cap to solve the problem of the bottle body slipping during the opening process, and the bottle cap can be easily opened. However, this patent also requires manual opening of the cap, and the opening process also increases the manual participation time in the testing process. At the same time, a large pressure needs to be applied downward when twisting the bottle cap. For some employees, the opening process is more difficult. When the number of samples to be tested is huge, it will also greatly consume the physical strength of the test personnel. Therefore, in order to reduce the manual participation in the coal powder testing process, an automatic opening device for coal powder sampling test bottles is developed. Summary of the invention

[0005] In order to solve the above problems, the present invention provides an automatic clamping and opening device for a coal powder sampling and testing bottle, which realizes the automatic opening function of the coal powder sampling and testing bottle by arranging multiple trigger sensing devices to control the electric push rod and the motor.

[0006] An automatic clamping and opening device for coal powder sampling and testing bottles is composed of a base, a pushing arc clamp seat, a fixed arc clamp seat, a cavity bracket and an up-and-down sliding cavity. The base serves as the base of the device, and the pushing arc clamp seat and the fixed arc clamp seat are installed on the base. The cavity bracket is installed at one end of the base, the fixed arc clamp seat is installed on the bottom of the cavity bracket, and the pushing arc clamp seat is installed at the other end of the base. The fixed arc clamp seat and the pushing arc clamp seat serve as components for clamping the bottle body, and the fixed arc clamp seat and the pushing arc clamp seat are opposite to each other. An opening device is installed at the bottom of the up-and-down sliding cavity, and the opening device is used to clamp the bottle cap for opening. In order to enable the opening device to contact the bottle cap, the up-and-down sliding cavity is located above the fixed arc clamp seat, and the up-and-down sliding cavity is slidably connected to the cavity bracket at the same time, so that the up-and-down sliding cavity can slide up and down along the cavity bracket.

[0007] In order to achieve the effect of fixing the bottle body, the side surface of the fixed arc clamp seat is arranged as a concave arc surface, so that the concave arc surface is directed toward the pushing arc clamp seat, and the shape of the concave arc surface can just accommodate the bottle body. In order to increase the clamping effect of the bottle body, an arc piece is arranged on the fixed arc clamp seat, and the arc piece is telescopically arranged on the concave arc surface, and the outward thrust of the arc piece itself is used to increase the clamping effect of the bottle body. At the same time, in order to avoid the arc piece affecting the clamping effect, the arc piece can be ensured to remain flush with the concave arc surface of the fixed arc clamp seat when it is fully retracted.

[0008] In order to automatically clamp the bottle body, the arc clamp seat is composed of a movable arc clamp seat, a cover shell and a first electric push rod. The first electric push rod is installed on the base, so that the first electric push rod is located in the cover shell, and the cover shell is installed on the base, and the movable arc clamp seat is connected to the telescopic end of the first electric push rod, so that the movable arc clamp seat faces the fixed arc clamp seat. When the first electric push rod is telescopic, it can drive the movable arc clamp seat to move forward and backward toward the fixed arc clamp seat, so that the movable arc clamp seat is close to or away from the first electric push rod, so as to cooperate with the fixed arc clamp seat to clamp the bottle body. An opening matching the movable arc clamp seat is opened on the cover shell, and the movable arc clamp seat is located in the opening to prevent the cover shell from affecting the movement of the movable arc clamp seat. At the same time, the outer side surface of the movable arc clamp seat is set to a concave arc surface, and the concave arc surface of the movable arc clamp seat faces the fixed arc clamp seat. The two concave arc surfaces form a clamping surface to clamp the bottle body.

[0009] In order to automatically control the rise and fall of the up and down moving cavity, a second electric push rod is arranged inside the cavity, and the second electric push rod is installed at the bottom of the cavity bracket. A vertical slide groove is opened on the side wall of the cavity bracket, and the slide groove is located on one side of the fixed arc clamp seat. A slider is installed on the up and down sliding cavity, and the slider is inserted into the slide groove so that the slider can move up and down along the slide groove, thereby driving the up and down sliding cavity to move. The second electric push rod is connected to the slider, and the movement of the up and down sliding cavity can be controlled by the movement of the second electric push rod.

[0010] A hole is opened at the bottom of the up-and-down sliding cavity for installing a cover opening device, and a third motor for driving the cover opening device is arranged in the up-and-down sliding cavity.

[0011] The cover opening device is composed of a left arc blade, a right arc blade, a bottom plate and a rotating cover opening cavity. The fourth electric push rod and the fifth electric push rod are installed on the bottom plate so that the fourth electric push rod and the fifth electric push rod are arranged in parallel. At the same time, the inner arc surface of the right arc blade is connected to the fifth electric push rod in the telescopic direction of the fourth electric push rod and the inner arc surface of the left arc blade is connected to the fourth electric push rod. The left arc blade and the right arc blade are controlled to approach and separate from each other by the fourth electric push rod and the fifth electric push rod, and the bottle cap is clamped by the left arc blade and the right arc blade. The rotating cover opening cavity is connected to the bottom plate, and a rotating shaft is arranged on the top of the rotating cover opening cavity. The rotating shaft extends from the bottom into the opening at the bottom of the up and down sliding cavity. The third motor is connected to the rotating shaft, and the rotating shaft is driven to rotate by the third driving motor, so that the rotating cover opening cavity is rotated, and then the bottle cap is twisted.

[0012] In order to realize automatic clamping of the bottle body, a photoelectric sensor is installed on the cover shell so that the photoelectric sensor is located just above the middle of the movable arc clamp seat. The photoelectric sensor is connected to the first electric push rod. When the bottle body is placed in front of the movable arc clamp seat, the photoelectric sensor can be triggered, thereby starting the first electric push rod to push the movable arc clamp seat to clamp the bottle body.

[0013] As a setting method of the fixed arc clamp seat, a support frame and two telescopic rods are set inside the fixed arc clamp seat, and one end of each telescopic rod is fixed on the protruding arc surface of the arc piece. After the spring is sleeved on the telescopic rod, the telescopic rod is passed through the preset hole on the support frame so that the spring is located between the arc piece and the support frame. A thread is set at the end of the telescopic rod, and the position of the telescopic rod is fixed by connecting a nut at the end of the telescopic rod. The arc piece can automatically pop outward through the cooperation of the telescopic rod and the spring, and the clamping force applied to the bottle body is controlled by the spring. At the same time, the first electric push rod extension stop limit sensor and the second electric push rod retraction start limit sensor are installed on the support frame. The installation position should ensure that when the arc piece is flush with the concave arc surface of the fixed arc clamp seat, the arc piece can trigger the first electric push rod extension stop limit sensor and the second electric push rod retraction start limit sensor, thereby controlling the first electric push rod to stop the extension program and the second electric push rod to start the retraction program.

[0014] As a connection method for the cover opening device, the third motor is fixedly installed horizontally in the upper and lower sliding cavities, a worm and a worm fixing bracket are connected to the rotating shaft of the third motor, and the worm fixing bracket is installed on the outer end of the worm, so that the rotating shaft of the third motor can be rotatably connected to the worm fixing bracket after passing through the worm, and the rotation of the third motor drives the worm to rotate. An external thread is set on the rotating shaft, and a threaded sleeve is set above the opening of the upper and lower sliding cavities. The rotating shaft and the threaded sleeve match each other, and the rotating shaft is inserted into the threaded sleeve. A slot is vertically opened on the rotating shaft, a hollow worm wheel is taken, and the worm wheel is sleeved on the rotating shaft so that the worm wheel can slide on the rotating shaft, and then a clamping tooth is set inside the worm wheel, and the clamping tooth is clamped into the slot. Four studs are arranged around the bottom hole opening of the upper and lower sliding cavity, and a main pressure plate is fixed to the four studs. The main pressure plate is fixed by nuts. A hole is opened in the middle of the main pressure plate, so that the rotating shaft is inserted into the hole of the main pressure plate, and the worm wheel is located below the main pressure plate. The worm wheel matches the worm, and the rotation of the worm can drive the worm wheel to rotate. Through the above arrangement, the rotating shaft, the threaded sleeve, the worm wheel and the worm form a ball screw structure, and when the worm rotates, the rotating shaft can move up and down along the threaded sleeve.

[0015] In order to realize automatic clamping of the bottle cap, a pressure plate is arranged under the bottom plate, four columns are arranged on the pressure plate, threads are arranged on the top of the columns, springs are sleeved on the columns, the upper ends of the columns are passed through the top of the bottom plate from the lower end of the bottom plate, so that the spring is located between the bottom plate and the pressure plate, and nuts are connected at the upper ends of the columns to fix the position of the pressure plate, so that the pressure plate can pop up downward under the action of the springs, and the downward pressure applied to the bottle caps is controlled by the springs. A second electric push rod retraction stop limit sensor, a fourth electric push rod retraction start limit sensor and a fifth electric push rod retraction start limit sensor are arranged on the top of the inner side of the rotating cover opening cavity, so that the second electric push rod retraction stop limit sensor is located above one column, and the fourth electric push rod retraction start limit sensor and the fifth electric push rod retraction start limit sensor are located above another column. It is necessary to ensure that when the distance between the pressure plate and the bottom is the smallest, the two columns can simultaneously trigger the second electric push rod retraction stop limit sensor, the fourth electric push rod retraction start limit sensor and the fifth electric push rod retraction start limit sensor, so as to control the second electric push rod to stop the retraction program and the fourth and fifth electric push rods to start the retraction program.

[0016] In order to realize automatic opening of the bottle cap, a left pull rod is provided on the inner side of the left arc-shaped blade, and a right pull rod is provided on the inner side of the right arc-shaped blade, the end of the left pull rod is connected below the end of the telescopic shaft of the fourth electric push rod, and the end of the right pull rod is connected below the end of the telescopic shaft of the fifth electric push rod, and a fourth electric push rod extension stop limit sensor and a fifth electric push rod extension stop limit sensor are arranged on the bottom plate, so that the sensing points of the fourth electric push rod extension stop limit sensor and the fifth electric push rod extension stop limit sensor are respectively located on the moving paths of the telescopic shaft ends of the fourth electric push rod and the fifth electric push rod, when the telescopic shafts of the fourth electric push rod and the fifth electric push rod extend to trigger the fourth electric push rod extension stop limit sensor and the fifth electric push rod extension stop limit sensor, the fourth electric push rod and the fifth electric push rod can be controlled to stop the extension program. A fourth electric push rod retraction stop limit sensor, a fifth electric push rod retraction stop limit sensor and a third motor reversal start limit sensor are provided on the side of the rotary cover opening cavity. The third motor reversal start limit sensor is set in the direction of the right arc blade, and the fourth electric push rod retraction stop limit sensor and the fifth electric push rod retraction stop limit sensor are set in the direction of the left arc blade. It is necessary to ensure that when the right arc blade and the left arc blade contact the rotary cover opening cavity, the right arc blade can trigger the third motor reversal start limit sensor, and the left arc blade can trigger the fourth electric push rod retraction stop limit sensor and the fifth electric push rod retraction stop limit sensor, thereby controlling the third motor to start reversing, and controlling the fourth electric push rod and the fifth electric push rod to extend the stop limit retraction program of the first electric push rod.

[0017] In order to realize the automatic reset function, a fixing bolt is arranged in the middle of the top of the rotating shaft, and a limit pressing plate is arranged on the fixing bolt so that the limit pressing plate can rotate around the fixing bolt. The four studs are arranged in a square shape, and the two ends of the limit pressing plate are respectively passed through the two studs on the short side of the square. The third motor forward rotation stop limit sensor, the fourth electric push rod extension start limit sensor and the fifth electric push rod extension start limit sensor are arranged on the upper and lower sliding cavities, so that the third motor forward rotation stop limit sensor is located below one end of the limit pressing plate, and the fourth electric push rod extension start limit sensor and the fifth electric push rod extension start limit sensor are located below the other end of the limit pressing plate. It is necessary to ensure that when the limit pressing plate is at the lowest position, the two ends of the limit pressing plate can simultaneously trigger the third motor forward rotation stop limit sensor, the fourth electric push rod extension start limit sensor and the fifth electric push rod extension start limit sensor, so as to control the third motor to stop forward rotation and control the fourth electric push rod and the fifth electric push rod to start the extension program.

[0018] In order to realize automatic stopping of the cover opening device, a third motor reversal stop limit sensor and a second electric push rod extension start limit sensor are arranged at the bottom of the upper and lower sliding cavity, so that the third motor reversal stop limit sensor and the second electric push rod extension start limit sensor are located directly above the rotary cover opening cavity. It is necessary to ensure that when the rotary cover opening cavity rises and contacts the upper and lower sliding cavity, the rotary cover opening cavity can trigger the third motor reversal stop limit sensor and the second electric push rod extension start limit sensor, thereby controlling the third motor to stop reversing and controlling the second electric push rod to start the extension program.

[0019] In order to realize automatic resetting of the cavity that moves up and down, a top plate is set at the top of the cavity bracket, and a second electric push rod extension stop limit sensor, a third motor forward rotation start limit sensor and a first electric push rod retraction start limit sensor are set on the top of the slider, so that the second electric push rod extension stop limit sensor, the third motor forward rotation start limit sensor and the first electric push rod retraction start limit sensor are located directly below the top plate. It is necessary to ensure that when the slider slides upward and contacts the top plate, the top plate can trigger the second electric push rod extension stop limit sensor, the third motor forward rotation start limit sensor and the first electric push rod retraction start limit sensor, thereby controlling the second electric push rod to stop the extension program, control the third motor to start forward rotation, and control the first electric push rod to start the retraction program.

[0020] In order to realize the automatic resetting of the movable arc clamp seat, a first electric push rod retraction stop limit sensor is arranged on the base, and the first electric push rod retraction stop limit sensor is installed inside the cover, so that the first electric push rod retraction stop limit sensor is located in the displacement direction of the movable arc clamp seat. When the movable arc clamp seat touches the first electric push rod retraction stop limit sensor, the first electric push rod retraction stop limit sensor triggers and controls the first electric push rod to stop retraction program. As a fixing method of the first electric push rod, a fixing bracket is arranged on the base, and the first electric push rod is installed on the fixing bracket.

[0021] In order to ensure that the fixed arc clamp and the movable arc clamp can firmly clamp the bottle body, the elastic force of the spring set on the telescopic rod needs to be 50-55 catties. In order to allow the cap opening device to press the bottle cap down to the right position so that the bottle cap can be rotated to open, the elastic force of the spring set on the column needs to be 50-55 catties. The two sets of springs can ensure the clamping and pressing effects while avoiding damage to the bottle body and bottle cap caused by excessive force.

[0022] In order to ensure that the right arc blade and the left arc blade can firmly clamp the bottle cap and twist the bottle cap, the inner arc surfaces of the right arc blade and the left arc blade are set to rough anti-skid surfaces to prevent slipping during rotation.

[0023] The specific steps of the automatic clamping and opening device for coal powder sampling and testing bottles to open the cover are as follows: S1: Place the bottle body on the bottom plate so that the bottle body is located between the fixed arc clamp seat and the pushing arc clamp seat. At this time, the photoelectric sensor on the cover shell detects that the bottle body enters and is triggered, and controls the first electric push rod to extend, so that the movable arc clamp seat moves toward the bottle body, and the movable arc clamp seat pushes the bottle body toward the arc piece. After the bottle body contacts the arc piece, it pushes the arc piece inward, and the arc piece is pushed and retracted. When the arc piece is fully retracted, the bottle body is firmly clamped and fixed on the base by the pushing arc clamp seat and the movable arc clamp seat.

[0024] S2: When the arc-shaped piece is fully retracted, the first electric push rod is triggered to extend and stop the limit sensor and the second electric push rod is triggered to retract and start the limit sensor, thereby controlling the first electric push rod to stop working. At this time, the bottle body has been clamped and fixed, and the first motor can be kept in the current position. At the same time, the second electric push rod is controlled to retract, driving the upper and lower sliding cavities to move downward, so that the cap opening device gradually approaches the bottle cap.

[0025] S3: When the up and down sliding cavity moves downward, the pressure plate begins to contact the bottle cap, and the pressure plate is continuously squeezed upward until the pressure plate is touched by the top of the bottle cap to the bottom plate, triggering the second electric push rod retraction stop limit sensor, the fourth electric push rod retraction start limit sensor and the fifth electric push rod retraction start limit sensor. At this time, the pressure applied by the pressure plate to the bottle cap is sufficient to start the operation of twisting the bottle cap, the second electric push rod stops the retraction movement and remains in the current position, and the fourth electric push rod and the fifth electric push rod retract inward, pulling the left arc blade and the right arc blade inward until they touch the side of the bottle cap, and the bottle cap is clamped by the left arc blade and the right arc blade.

[0026] S4: When the left arc blade and the right arc blade contact the side of the bottle cap to complete the bottle cap clamping, the left arc blade and the right arc blade just contact the rotary open cover cavity and trigger the third motor reverse start limit sensor, the fourth electric push rod retract start limit sensor and the fifth electric push rod retract start limit sensor. At this time, the bottle cap clamping is completed, and the retraction movement of the fourth electric push rod and the fifth electric push rod is controlled to stop and remain in the current position. At the same time, the third motor is started to reverse and drive the worm to rotate. The worm then drives the worm wheel, the rotating shaft, and the rotary open cover cavity to rotate synchronously, and the bottle cap is rotated and loosened during rotation. At the same time, during the loosening process, due to the cooperation between the external thread of the rotating shaft and the threaded sleeve, the open cover device will move upward, thereby driving the bottle cap to move upward, that is, completing the twisting open cover process. This process continues until the rotary open cover cavity contacts the upper and lower sliding cavity, and the bottle cap is completely separated from the bottle body.

[0027] S5: When the rotary lid opening cavity contacts the upper and lower sliding cavity, the third motor reverse stop limit sensor and the second electric push rod extend to start the limit sensor, thereby controlling the third motor to stop reversing and the rotary lid opening cavity to stop rotating. At the same time, the second electric push rod is controlled to extend, driving the upper and lower sliding cavity to move upward, and moving the bottle cap further away from the bottle body.

[0028] S6: When the up-and-down sliding cavity moves upward to the highest point, the slider contacts the top plate to trigger the second electric push rod extension stop limit sensor, the third motor forward start limit sensor and the first electric push rod retraction stop limit sensor, thereby controlling the second electric push rod to stop extending, stopping the ascending program of the up-and-down sliding cavity, and controlling the first electric push rod to start retracting, pulling back the movable arc clamp seat to release the bottle body, and when the movable arc clamp seat leaves the bottle body, the bottle body can be removed from the base. At the same time, the third motor starts to rotate forward to drive the worm to rotate, and the worm synchronously drives the worm wheel, the rotating shaft, and the rotary opening cover cavity to rotate synchronously. Under the cooperation of the external thread of the rotating shaft and the threaded sleeve, the rotary opening cover cavity starts to move downward, driving the limit pressing plate to move downward. When the limit pressing plate moves to the lowest position, the third motor forward rotation stop limit sensor, the fourth electric push rod extension start limit sensor and the fifth electric push rod extension start limit sensor are triggered to control the third motor to stop forward rotation and stop the descending program of the rotary opening cover cavity. At the same time, the fourth electric push rod and the fifth electric push rod are started to extend outward to make the left arc blade and the right arc blade move away from the bottle cap, loosen the bottle cap and remove it.

[0029] S7: When the first electric push rod drives the movable arc clamp seat to retract, the movable arc clamp seat triggers the first electric push rod retraction stop limit sensor, controls the first electric push rod to stop retracting, and resets the movable arc clamp seat to the initial position. During the extension of the fourth and fifth electric push rods, the telescopic ends of the two respectively trigger the fourth and fifth electric push rod extension stop limit sensors, control the fourth and fifth electric push rods to stop the extension program, and reset the left and right arc blades to the initial positions. Then the reset work of the entire device is completed.

[0030] In order to prevent the first electric push rod, the fourth electric push rod and the fifth electric push rod from being affected by sudden circuit connection when the next step is executed after the first electric push rod stops, the fourth electric push rod stops extending and the fifth electric push rod stops extending, thereby affecting the clamping effect on the bottle body and the bottle cap, a time relay is connected to the first electric push rod retraction stop limit sensor, the fourth electric push rod extension stop limit sensor and the fifth electric push rod extension stop limit sensor, and utilizes the delayed closing and instantaneous opening characteristics of the time relay to prevent the circuit from being directly connected due to a short-term connection phenomenon.

[0031] The automatic clamping and opening device for coal dust sampling and testing bottles provided by the present invention can realize the automatic opening function of coal dust sampling and testing bottles, realize the automation of opening the coal dust sampling and testing bottles, and reduce the manual participation in the detection process. During the opening process, the bottle body can be kept completely motionless, and at the same time, appropriate pressure is applied to the bottle cap so that the bottle cap can be opened correctly. The overall device has a high degree of automation, and the subsequent opening procedure can be completed by only placing the coal dust sampling and testing bottle in a predetermined position. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention is further described in detail below with reference to the accompanying drawings.

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the back structure when the cavity support is hollow; Figure 3 It is a schematic diagram of the perspective structure of the cavity support from the side; Figure 4 It is a perspective structural diagram of the back of the fixed arc-shaped clamping seat; Figure 5 To promote the schematic diagram of the arc clamp explosion structure; Figure 6 It is a schematic diagram of the side structure of the arc-shaped clamp seat; Figure 7 It is a perspective structural diagram of the upper part of the up-and-down sliding cavity; Figure 8 It is a schematic diagram of the explosion structure of the up-and-down sliding cavity; Fig. 9 This is a schematic diagram of the disassembled state of the cover opening device; Fig.10 It is a schematic diagram of the internal structure of the rotating cover cavity in the flipping state; Fig.11 It is a schematic diagram of the pressure plate structure; Fig.12 A circuit diagram of the present invention; As shown in the figure: 1-base; 2-pushing arc clamp seat; 3-fixed arc clamp seat; 4-cavity bracket; 5-up and down sliding cavity; 6-opening device; 21-first electric push rod; 22-moving arc clamp seat; 23-cover; 24-first electric push rod retract stop limit sensor; 25-fixed bracket; 26-photoelectric sensor; 31-support frame; 32-arc sheet; 33-telescopic rod; 34-first electric push rod extend stop limit sensor; 35-second electric push rod retract start limit sensor ;41-top plate;42-second electric push rod;43-slideway;51-worm;52-third motor;53-worm wheel;54-stud;55-main pressure plate;56-limit pressure plate;57-card slot;58-third motor reverse stop limit sensor;59-second electric push rod extension start limit sensor;510-second electric push rod extension stop limit sensor;511-third motor forward start limit sensor;512-third motor forward stop limit sensor;513-first electric Push rod retract start limit sensor; 514- fourth electric push rod extension start limit sensor; 515- fifth electric push rod extension start limit sensor; 516- threaded sleeve; 517- slider; 518- latching tooth; 519- worm fixing bracket; 61- rotating cover opening cavity; 62- bottom plate; 63- pressure plate; 64- left arc blade; 65- right arc blade; 66- fourth electric push rod; 67- fifth electric push rod; 68- column; 69- fourth electric push rod extension stop limit sensor; 610-the fifth electric push rod extension stop limit sensor; 611-the fourth electric push rod retract stop limit sensor; 612-the fifth electric push rod retract stop limit sensor; 613-the fourth electric push rod retract start limit sensor; 614-the fifth electric push rod retract start limit sensor; 615-the second electric push rod retract stop limit sensor; 616-rotating shaft; 617-left pull rod; 618-the third motor reverse start limit sensor; 619-right pull rod; 620-fixing bolt. DETAILED DESCRIPTION

[0034] To further illustrate the concept of the present invention, the present invention will be further described in detail by specific examples below. The following examples are only for illustrative purposes to illustrate and explain the present invention, and should not be construed as limiting the scope of protection of the present invention. All technologies implemented based on the contents of the present invention are included in the scope of protection intended by the present invention.

[0035] An automatic clamping and opening device for coal powder sampling and testing bottles, such as Figure 1 As shown, it includes a base 1, a pushing arc-shaped clamp seat 2, a fixed arc-shaped clamp seat 3, a cavity support 4 and an up-and-down sliding cavity 5, and a cover opening device 6 is installed at the bottom of the up-and-down sliding cavity.

[0036] The fixed arc clamp seat 3 is roughly a rectangular shell, one side of which is a concave arc surface, and an arc piece 32 is installed on the concave arc surface so that the arc piece 32 can be embedded in the concave arc surface. The installation method of the arc piece 32 is to install a support frame 31 inside the fixed arc frame, punch two holes on the support frame 31, and then fix two telescopic rods 33 on the protruding arc surface of the arc piece 32 so that the telescopic rods 33 can extend into the holes on the support frame 31, open threads on the ends of the telescopic rods 33, and respectively put two springs with an elastic force of 50 pounds on the two telescopic rods 33, and then pass the telescopic rods 33 through the support frame 31, connect nuts at the ends of the telescopic rods 33, and install the arc piece 32 on the support frame 31. The first electric push rod extension stop limit sensor 34 and the second electric push rod retract start limit sensor 35 are installed on the support frame 31 and adjusted in position so that when the arc-shaped piece 32 is embedded in the fixed arc-shaped clamp seat 3, the protruding arc surface of the arc-shaped piece 32 can just trigger the first electric push rod extension stop limit sensor 34 and the second electric push rod retract start limit sensor 35. Figure 4 shown.

[0037] The cover opening device 6 is as follows Fig. 9 As shown, it is composed of a left arc blade 64, a right arc blade 65, a bottom plate 62 and a rotating cover opening cavity 61. A fourth electric push rod 66 and a fifth electric push rod 67 are installed horizontally and parallel on the bottom plate 62, so that the fourth electric push rod 66 and the fifth electric push rod 67 have opposite extension directions. A pressure plate is set below the bottom plate 62, and four columns 68 are welded on the pressure plate. Threads are opened on the top of the columns 68. After springs with an elastic force of 50 catties are respectively set on the columns 68, as shown in FIG. Fig.11As shown, the column 68 is inserted from the lower end of the bottom plate 62 into the top of the bottom plate 62, and the pressure plate is fixed by connecting a nut at the end of the column 68. A left tie rod 617 is welded on the inner side of the left arc-shaped blade 64, and a right tie rod 619 is welded on the inner side of the right arc-shaped blade 65. The end of the left tie rod 617 is connected below the end of the telescopic shaft of the fourth electric push rod 66, and the end of the right tie rod 619 is connected below the end of the telescopic shaft of the fifth electric push rod 67. The fourth electric push rod extension stop limit sensor 69 and the fifth electric push rod extension stop limit sensor 610 are installed on the bottom plate 62, so that the sensing points of the fourth electric push rod extension stop limit sensor 69 and the fifth electric push rod extension stop limit sensor 610 are respectively located on the moving paths of the telescopic shaft ends of the fourth electric push rod 66 and the fifth electric push rod 67. The rotary cover opening cavity 61 is a cylinder with an opening at the bottom and a closed top. The fourth electric push rod retraction stop limit sensor 611, the fifth electric push rod retraction stop limit sensor 612 and the third motor reversal start limit sensor 618 are installed on the side of the rotary cover opening cavity 61. During installation, the third motor reversal start limit sensor 618 is located in the direction of the right arc blade 65, and the fourth electric push rod retraction stop limit sensor 611 and the fifth electric push rod retraction stop limit sensor 612 are located in the direction of the left arc blade 64. When the right arc blade 65 and the left arc blade 64 contact the rotary cover opening cavity 61, the right arc blade 65 triggers the third motor reversal start limit sensor 618, and the left arc blade 64 triggers the fourth electric push rod retraction stop limit sensor 611 and the fifth electric push rod retraction stop limit sensor 612. A rotating shaft 616 is welded on the top of the rotary cover opening cavity 61, and the rotating shaft 616 has an external thread. The second electric push rod retraction stop limit sensor 615, the fourth electric push rod retraction start limit sensor 613 and the fifth electric push rod retraction start limit sensor 614 are installed on the top of the inner side of the rotary cover opening cavity 61 and adjusted so that the second electric push rod retraction stop limit sensor 615 is located above one column 68, and the fourth electric push rod retraction start limit sensor 613 and the fifth electric push rod retraction start limit sensor 614 are located above another column 68. It is necessary to ensure that when the distance between the pressure plate and the bottom is minimized, the two columns 68 can simultaneously trigger the second electric push rod retraction stop limit sensor 615, the fourth electric push rod retraction start limit sensor 613 and the fifth electric push rod retraction start limit sensor 614. Then fix the rotary cover opening cavity 61 on the bottom plate 62. It is necessary to open a groove on the rotary cover opening cavity 61 to avoid the left pull rod 617 and the right pull rod 619, such as Fig.10As shown, the interference of the rotating cover opening cavity 61 on the left pull rod 617 and the right pull rod 619 can be avoided, and a certain limit effect can be achieved. When assembling the cover opening device 6, in order to increase the accuracy of the second electric push rod retracting stop limit sensor 615, the fourth electric push rod retracting start limit sensor 613 and the fifth electric push rod retracting start limit sensor 614, a pressing sheet can be installed on the top of the corresponding column 68 to increase the contact area. The second electric push rod retraction stop limit sensor 615, the fourth electric push rod retraction start limit sensor 613 and the fifth electric push rod retraction start limit sensor 614 can also be directly installed on the column 68, and the top of the rotating cover opening wall 61 is used as the triggering part, so that the second electric push rod retraction stop limit sensor 615, the fourth electric push rod retraction start limit sensor 613 and the fifth electric push rod retraction start limit sensor 614 can move up and down with the column 68. When rising to the highest point, the inner top surface of the rotating cover opening wall 61 contacts and triggers the second electric push rod retraction stop limit sensor 615, the fourth electric push rod retraction start limit sensor 613 and the fifth electric push rod retraction start limit sensor 614 to start the next operation step.

[0038] The sliding cavity 5 is as follows Figure 7 , Figure 8As shown, a rectangular shell is provided, and a slider 517 is installed on the side of the upper and lower sliding cavity 5. The slider 517 is a rectangular cylindrical structure with upper and lower end faces opened, and a hole is opened at the bottom of the upper and lower sliding cavity 5. The third motor 52 is horizontally installed in the upper and lower sliding cavity 5. A worm 51 is connected to the rotating shaft of the third motor 52, and a worm fixing bracket 519 is installed on the outer end of the worm 51, so that the outermost end of the rotating shaft of the third motor 52 is inserted into the worm fixing bracket 519. A threaded sleeve 516 is welded in the upper and lower sliding cavity 5, and the threaded sleeve 516 needs to be able to be threadedly connected with the rotating shaft 616. The threaded sleeve 516 is welded above the opening of the upper and lower sliding cavity 5, and the rotating shaft 616 is inserted into the threaded sleeve 516. A slot 57 is vertically opened on the rotating shaft 616, and then a hollow worm wheel 53 is sleeved on the rotating shaft 616. The worm wheel 53 matches the worm 51 so that the worm wheel 53 can slide on the rotating shaft 616. A tooth 518 is welded on the inner ring of the worm wheel 53, and the tooth 518 is inserted into the slot 57. Then, four studs 54 arranged in a square are welded around the threaded sleeve 516, a plate is taken as the main pressure plate 55, a hole is opened in the middle of the main pressure plate 55, the studs 54 are passed through the main pressure plate 55 and fixed with nuts, so that the rotating shaft 616 passes through the middle of the main pressure plate 55, and the worm gear 53 is pressed by the main pressure plate 55, so that when the worm 51 rotates, it can drive the worm gear 53 to rotate. A limit pressing plate 56 is installed at the middle of the top of the rotating shaft 616. A hole is opened in the middle of the limit pressing plate 56. The fixing bolt 620 passes through the limit pressing plate 56 and is fixed on the rotating shaft 616. The two ends of the limit pressing plate 56 are respectively passed through between the two studs 54 on the short sides of the square. Then, the third motor forward rotation stop limit sensor 512, the fourth electric push rod extension start limit sensor 514 and the fifth electric push rod extension start limit sensor 515 are installed on the upper and lower sliding cavity 5, so that the third motor forward rotation stop limit sensor 512 is located below one end of the limit pressing plate 56, and the fourth electric push rod extension start limit sensor 514 and the fifth electric push rod extension start limit sensor 515 are located below the other end of the limit pressing plate 56, so as to ensure that when the limit pressing plate 56 is at the lowest point, the two ends of the limit pressing plate 56 can simultaneously trigger the third motor forward rotation stop limit sensor 512, the fourth electric push rod extension start limit sensor 514 and the fifth electric push rod extension start limit sensor 515. Finally, the third motor reversal stop limit sensor 58 and the second electric push rod extension start limit sensor 59 are installed at the bottom of the upper and lower sliding cavity 5, so that the third motor reversal stop limit sensor 58 and the second electric push rod extension start limit sensor 59 are located directly above the rotating cover opening cavity 61 to ensure that when the rotating cover opening cavity 61 rises and contacts the upper and lower sliding cavity 5, the rotating cover opening cavity 61 can trigger the third motor reversal stop limit sensor 58 and the second electric push rod extension start limit sensor 59.When installing the third motor reverse stop limit sensor 58 and the second electric push rod extension start limit sensor 59, the third motor reverse stop limit sensor 58 and the second electric push rod extension start limit sensor 59 can be directly installed on the outer bottom surface of the upper and lower sliding cavity 5, and directly triggered by rotating the cover opening cavity 61, or as follows. Figure 8 As shown in , the third motor reverse stop limit sensor 58 and the second electric push rod extension start limit sensor 59 are installed on the inner bottom surface of the upper and lower slideway cavity 5, and then the trigger probes of the third motor reverse stop limit sensor 58 and the second electric push rod extension start limit sensor 59 are extended. The next step of the program is started by rotating the cover cavity 61 to trigger the trigger probe. The third motor reverse start limit sensor 618, the fourth electric push rod retract start limit sensor 613 and the fifth electric push rod retract start limit sensor 614 can also be installed in this way. All sensors are installed inside the device. During the wiring process, in order to hide the wires, holes can be drilled on the slider 517. One hole is located at the bottom of the slider 517, and the other hole is located at the connection between the slider 517 and the upper and lower sliding cavity 5 and leads to the inside of the upper and lower sliding cavity 5, so that the wires can pass through them and enter the upper and lower sliding cavity 5 to connect the circuit, avoiding the wires from affecting the appearance outside.

[0039] The cavity support 4 is a rectangular shell. Figure 2 As shown, the top of the cavity bracket 4 is a top plate 41, and a vertical slide groove 43 is opened on one side of the cavity bracket 4. The second electric push rod 42 is installed at the bottom of the cavity bracket 4, and the second electric push rod extension stop limit sensor 510, the third motor forward rotation start limit sensor 511 and the first electric push rod retraction start limit sensor 513 are installed on the inner side wall of the top of the slider 517. The second electric push rod extension stop limit sensor 510, the third motor forward rotation start limit sensor 511 and the first electric push rod retraction start limit sensor 513 are located directly below the top plate 41, and the slider 517 of the up and down sliding cavity 5 is inserted into the slide groove 43, and the telescopic end of the second electric push rod 42 is connected to the bottom of the slider 517. It is necessary to ensure that when the slider 517 slides upward to contact the top plate 41, the top plate 41 can trigger the second electric push rod to extend and stop the limit sensor 510, the third motor forward start limit sensor 511 and the first electric push rod to retract and start the limit sensor 513, such as Figure 3 shown.

[0040] The arc clamp seat 2 is composed of a movable arc clamp seat 22, a cover 23 and a first electric push rod 21. The cover 23 is a rectangular shell. The front of the movable arc clamp seat 22 is a concave arc surface. The telescopic end of the first electric push rod 21 is connected to the back of the movable arc clamp seat 22. An opening in the same shape as the movable arc clamp seat 22 is opened on the side of the cover 23. A photoelectric sensor 26 is installed at the upper part of the cover 23 in the middle of the movable arc clamp seat 22. Figure 5 , Figure 6 shown.

[0041] Take a rectangular plate as the base 1, install the cavity bracket 4 at one end of the base 1, install the fixed arc clamp seat 3 on the bottom side of the cavity bracket 4, and push the installation position of the arc clamp seat 2 at the other end of the base 1, so that the arc piece 32 faces the push arc clamp seat 2. When installing the push arc clamp seat 2, first install the fixed bracket 25 for fixing the first electric push rod 21 on the base 1 according to the predetermined installation position, and install the first electric push rod retraction stop limit sensor 24 on the retraction line of the moving arc clamp seat 22, and then install the first electric push rod 21 on the fixed bracket 25, so that the moving arc clamp seat 22 faces the fixed arc clamp seat 3, and then install the cover shell 23 on the base 1. During installation, let the moving arc clamp seat 22 be stuck in the opening on the cover shell 23, as shown in FIG. Figure 1 shown.

[0042] Finally, connect all sensors to the electric mechanism. The connection circuit diagram is as follows Fig.12 As shown, a contactor is used as an important control node in the circuit. When a working process circuit of the electric mechanism is connected, the contactor is used to ensure that the circuit of the reverse working process is disconnected, and at the same time, the circuit itself is ensured to form a long connected state, so as to achieve a unidirectional working process. In this circuit, a time relay circuit is set to replace the contactor for the stop limit circuit of the first electric push rod 21, the extension start limit circuit of the fifth electric push rod 67, and the extension start limit circuit of the fourth electric push rod 66. The characteristics of the time relay's delayed closing and instantaneous opening are used to avoid the influence of the direct circuit connection on the clamping effect due to the short-term connection phenomenon when the work stops.

[0043] The specific working steps of the automatic clamping and opening device 6 for opening the cover of the coal powder sampling and testing bottle are as follows: S1: Place the bottle body on the bottom plate 62 so that the bottle body is located between the fixed arc clamp seat 3 and the pushing arc clamp seat 2. At this time, the photoelectric sensor 26 on the cover shell 23 detects the entry of the bottle body and is triggered, controlling the first electric push rod 21 to extend, allowing the movable arc clamp seat 22 to move toward the bottle body, allowing the movable arc clamp seat 22 to push the bottle body toward the arc piece 32. After the bottle body contacts the arc piece 32, the arc piece 32 is pushed inward, and the arc piece 32 is pushed back. When the arc piece 32 is fully retracted, the bottle body is firmly clamped and fixed on the base 1 by the pushing arc clamp seat 2 and the movable arc clamp seat 22.

[0044] S2: When the arc-shaped piece 32 is fully retracted, the first electric push rod is triggered to extend and stop the limit sensor 34 and the second electric push rod is triggered to retract and start the limit sensor 35, thereby controlling the first electric push rod 21 to stop working. At this time, the bottle body has been clamped and fixed, and the first motor can be kept in the current position. At the same time, the second electric push rod 42 is controlled to retract, driving the upper and lower sliding cavity 5 to move downward, so that the opening device 6 gradually approaches the bottle cap.

[0045] S3: When the up and down sliding cavity 5 moves downward, the pressure plate begins to contact the bottle cap, and the pressure plate is continuously squeezed upward until the pressure plate is touched by the top of the bottle cap to the bottom plate 62, triggering the second electric push rod retraction stop limit sensor 615, the fourth electric push rod retraction start limit sensor 613 and the fifth electric push rod retraction start limit sensor 614. At this time, the pressure applied by the pressure plate to the bottle cap is sufficient to start the operation of twisting the bottle cap, and the second electric push rod 42 stops the retraction movement and remains in the current position. At the same time, the fourth electric push rod 66 and the fifth electric push rod 67 retract inward, pulling the left arc blade 64 and the right arc blade 65 inward until they contact the side of the bottle cap, and the left arc blade 64 and the right arc blade 65 are used to clamp the bottle cap.

[0046] S4: When the left arc blade 64 and the right arc blade 65 contact the side of the bottle cap to complete the bottle cap clamping, the left arc blade 64 and the right arc blade 65 just contact the rotating cover opening cavity 61 and trigger the third motor reverse start limit sensor 618, the fourth electric push rod retract start limit sensor 613 and the fifth electric push rod retract start limit sensor 614. At this time, the bottle cap is clamped, and the retraction movement of the fourth electric push rod 66 and the fifth electric push rod 67 is controlled to stop and remain at the current position, and at the same time start The third motor 52 starts to reverse and drives the worm 51 to rotate. The worm 51 then drives the worm wheel 53, the rotating shaft 616, and the rotating cover opening cavity 61 to rotate synchronously, and the bottle cap is rotated and loosened during rotation. At the same time, during the loosening process, due to the cooperation between the external thread of the rotating shaft 616 and the threaded sleeve 516, the cover opening device 6 will move upward, thereby driving the bottle cap to move upward, that is, completing the twisting and opening process. This process continues until the rotating cover opening cavity 61 contacts the upper and lower sliding cavity 5, and the bottle cap is completely separated from the bottle body.

[0047] S5: When the rotating lid opening cavity 61 contacts the upper and lower sliding cavity 5, the third motor reverse stop limit sensor 58 and the second electric push rod extend to start the limit sensor 59, thereby controlling the third motor 52 to stop reversing, the rotating lid opening cavity 61 to stop rotating, and at the same time controlling the second electric push rod 42 to extend, driving the upper and lower sliding cavity 5 to move upward, and moving the bottle cap further away from the bottle body.

[0048] S6: When the up-and-down sliding cavity 5 moves upward to the highest point, the slider 517 contacts the top plate 41 to trigger the second electric push rod extension stop limit sensor 510, the third motor forward rotation start limit sensor 511 and the first electric push rod retraction start limit sensor 513, control the second electric push rod 42 to stop extending, stop the upward program of the up-and-down sliding cavity 5, and control the first electric push rod 21 to start retracting, pull back the movable arc clamp seat 22 to release the bottle body, and when the movable arc clamp seat 22 leaves the bottle body, the bottle body can be removed from the base 1. At the same time, the third motor 52 starts to rotate forward to drive the worm 51 to rotate, and the worm 51 synchronously drives the worm wheel 53, the rotating shaft 616, and the rotating cover opening cavity 61 to rotate synchronously. Under the cooperation of the external thread of the rotating shaft 616 and the threaded sleeve 516, the rotating cover opening cavity 61 starts to move downward, driving the limit pressing plate 56 to move downward. When the limit pressing plate 56 moves to the lowest position, the third motor is triggered to stop the forward rotation limit sensor 512, the fourth electric push rod extends to start the limit sensor 514 and the fifth electric push rod extends to start the limit sensor 515, and the third motor 52 is controlled to stop forward transmission and stop the descending program of the rotating cover opening cavity 61. At the same time, the fourth electric push rod 66 and the fifth electric push rod 67 are started to extend outward, so that the left arc blade 64 and the right arc blade 65 are away from the bottle cap, and the bottle cap is loosened and removed.

[0049] S7: When the first electric push rod 21 drives the movable arc clamp seat 22 to retract, the movable arc clamp seat 22 triggers the first electric push rod retraction stop limit sensor 24, controls the first electric push rod 21 to stop retracting, and resets the movable arc clamp seat 22 to the initial position. During the extension process of the fourth electric push rod 66 and the fifth electric push rod 67, the telescopic ends of the two respectively trigger the fourth electric push rod extension stop limit sensor 69 and the fifth electric push rod extension stop limit sensor 610, control the fourth electric push rod 66 and the fifth electric push rod 67 to stop the extension process, and reset the left arc blade 64 and the right arc blade 65 to the initial position. Then the reset work of the entire device is completed.

[0050] During the research and development process, by studying the force applied to the coal dust sampling and testing bottle, it was finally found that when the force of clamping the bottle body reaches 50 pounds, the bottle body can ensure that it does not rotate during the clamping process. At the same time, only when the pressure applied downward on the bottle cap reaches 50 pounds can the bottle cap be twisted correctly. Therefore, the spring set on the column 68 and the telescopic rod 33 needs to provide an elastic force of 50 pounds to ensure that the coal dust sampling and testing bottle can be opened smoothly. At the same time, the elastic force cannot be too large, otherwise it will cause damage to the bottle body. Therefore, the maximum elastic force is limited to 55 pounds. In the above embodiments, the connection method not specially explained can be connected by existing commonly used connection methods, such as bolt connection, welding, bonding, riveting, etc. As long as the connection method can achieve the connection strength required for use, it is not specially explained.

[0051] There are many methods and approaches to implement the technical solutions of the present invention, and the above are only preferred implementations provided by way of example. Those skilled in the art may think of many changes, modifications and substitutions without departing from the present invention. It should be understood that various alternatives to the implementations of the present invention described herein may be adopted in the practice of the present invention. The attached claims are intended to limit the scope of the present invention and therefore cover methods within the scope of these claims and their equivalents. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

Claims

1. An automatic clamping and opening device for coal powder sampling and testing bottles, characterized in that: The invention comprises a base (1), a pushing arc clamp seat (2), a fixed arc clamp seat (3), a cavity support (4) and an up-and-down sliding cavity (5); a cover opening device (6) is provided at the bottom of the up-and-down sliding cavity (5); the pushing arc clamp seat (2) is arranged on one side of the base (1), the cavity support (4) is arranged on the other side of the base (1), and the fixed arc clamp seat (3) is installed at the bottom of the cavity support (4) and faces the pushing arc clamp seat (2); the up-and-down sliding cavity (5) is connected to the cavity support (4) in an up-and-down sliding manner, and the up-and-down sliding cavity (5) is located above the fixed arc clamp seat (3); The fixed arc-shaped clamp seat (3) has a concave arc-shaped surface on one side facing the pushing arc-shaped clamp seat (2), and a retractable arc-shaped sheet (32) is provided on the concave arc-shaped surface of the fixed arc-shaped clamp seat (3). When the arc-shaped sheet (32) is retracted, it is flush with the concave arc-shaped surface of the fixed arc-shaped clamp seat (3); The pushing arc clamp seat (2) comprises a movable arc clamp seat (22), a cover shell (23) and a first electric push rod (21); the cover shell (23) is mounted on the base; the first electric push rod (21) is mounted on the base (1) and is located in the cover shell (23); the movable arc clamp seat (22) is connected to the telescopic end of the first electric push rod (21); the movable arc clamp seat (22) can approach or move away from the first electric push rod (21) under the drive of the first electric push rod (21); an opening matching the movable arc clamp seat (22) is opened on the cover shell (23); the movable arc clamp seat (22) is located in the opening; the movable arc clamp seat (22) is provided with a concave arc surface on the side facing the fixed arc clamp seat (3); A second electric push rod (42) is provided at the bottom of the cavity support (4), a vertical slide groove (43) is provided on the side wall of the cavity support (4) facing the fixed arc-shaped clamping seat (3), a slider (517) is provided on the up-and-down sliding cavity (5), the slider (517) is inserted into the slide groove (43), and the second electric push rod (42) is connected to the slider (517); The bottom of the up-and-down sliding cavity (5) is provided with an opening, and a third motor (52) is arranged in the up-and-down sliding cavity (5); The cover opening device (6) comprises a left arc-shaped blade (64), a right arc-shaped blade (65), a bottom plate (62) and a rotary cover opening cavity (61); a fourth electric push rod (66) and a fifth electric push rod (67) are provided on the bottom plate (62); the fourth electric push rod (66) and the fifth electric push rod (67) extend and retract in opposite directions and are arranged in parallel; the inner arc surface of the right arc-shaped blade (65) is connected to the fifth electric push rod (67); the inner arc surface of the left arc-shaped blade (64) is connected to the fourth electric push rod (66); the rotary cover opening cavity (61) is connected to the bottom plate (62); a rotating shaft (616) is provided at the top of the rotary cover opening cavity (61); the rotating shaft (616) extends into an opening at the bottom of the up-and-down sliding cavity (5); a third motor (52) is connected to the rotating shaft (616); and the third drive motor can drive the rotating shaft (616) to rotate.

2. The automatic clamping and opening device for coal powder sampling and testing bottles according to claim 1 is characterized in that: The cover shell (23) is provided with a photoelectric sensor (26), the photoelectric sensor (26) is located above the middle position of the movable arc-shaped clamp seat (22), and the photoelectric sensor (26) is connected to the first electric push rod (21).

3. The automatic clamping and opening device for coal powder sampling and testing bottles according to claim 2 is characterized in that: The fixed arc-shaped clamp seat (3) is provided with a support frame (31) and two telescopic rods (33) inside, one end of each telescopic rod is fixed on the protruding arc surface of the arc piece (32), and the other end can be movably passed through a preset hole on the support frame (31) and then threadedly connected with a nut, a spring is sleeved on the telescopic rod (33), and the spring is located between the arc piece (32) and the support frame (31); a first electric push rod extension stop limit sensor (34) and a second electric push rod retraction start limit sensor (35) are provided on the support frame (31), when the arc piece (32) is flush with the concave arc surface of the fixed arc-shaped clamp seat (3), the arc piece (32) triggers the first electric push rod extension stop limit sensor (34) and the second electric push rod retraction start limit sensor (35).

4. The automatic clamping and opening device for coal powder sampling and testing bottles according to claim 3 is characterized in that: The third motor (52) is transversely arranged in the upper and lower sliding cavity (5); the worm (51) is coaxially connected to the rotating shaft of the third motor (52); a worm fixing bracket (519) is provided in the upper and lower sliding cavity (5); the worm fixing bracket (519) is arranged at the outer end of the worm (51); the rotating shaft of the third motor (52) passes through the worm (51) and is rotatably connected to the worm fixing bracket (519); an external thread is provided on the rotating shaft (616); a threaded sleeve (516) matching the rotating shaft (616) is provided above the opening of the upper and lower sliding cavity (5); the rotating shaft (616) is inserted into the threaded sleeve (516); the rotating shaft (616) is provided with a threaded sleeve (516) A vertical slot (57) is provided, a worm wheel (53) is sleeved on the rotating shaft (616), the worm wheel (53) can slide on the rotating shaft (616), a latching tooth (518) is provided inside the worm wheel (53), and the latching tooth (518) is latched in the slot (57); four studs (54) are provided around the bottom hole opening of the upper and lower sliding cavity (5), a main pressure plate (55) is fixed on the studs (54) by nuts, the main pressure plate (55) has a hole in the middle, the rotating shaft (616) is inserted into the hole of the main pressure plate (55), the worm wheel (53) is located below the main pressure plate (55), the worm wheel (53) matches the worm (51), and the worm (51) can drive the worm wheel (53) to rotate when the worm (51) rotates.

5. The automatic clamping and opening device for coal powder sampling and testing bottles according to claim 4 is characterized in that: A pressure plate (63) is provided below the bottom plate (62), and four columns (68) are provided on the pressure plate (63). The top of the column (68) is provided with a thread. The upper end of the column (68) penetrates from the lower end of the bottom plate (62) into the top of the bottom plate (62). A nut is connected to the upper end of the column (68). A spring is sleeved on the column (68), and the spring is located between the bottom plate (62) and the pressure plate (63). A second electric push rod retraction stop limit sensor (615), a fourth electric push rod retraction start limit sensor (613) and a fifth electric push rod retraction start limit sensor (614) are provided on the top of the inner side of the rotating cover opening cavity (61). The start limit sensor (614) and the second electric push rod retraction stop limit sensor (615) are located above one column (68), and the fourth electric push rod retraction start limit sensor (613) and the fifth electric push rod retraction start limit sensor (614) are located above another column (68). When the distance between the pressure plate (63) and the bottom plate (62) is the smallest, the two columns (68) simultaneously trigger the second electric push rod retraction stop limit sensor (615), the fourth electric push rod retraction start limit sensor (613) and the fifth electric push rod retraction start limit sensor (614).

6. The automatic clamping and opening device for coal powder sampling and testing bottles according to claim 5 is characterized in that: A left pull rod (617) is provided on the inner side of the left arc-shaped blade (64), and a right pull rod (619) is provided on the inner side of the right arc-shaped blade (65). The end of the left pull rod (617) is connected to the telescopic end of the fourth electric push rod (66), and the end of the right pull rod (619) is connected to the telescopic end of the fifth electric push rod (67). A fourth electric push rod extension stop limit sensor (69) and a fifth electric push rod extension stop limit sensor (610) are provided on the bottom plate (62). The sensing points of the fourth electric push rod extension stop limit sensor (69) and the fifth electric push rod extension stop limit sensor (610) are respectively located on the moving paths of the telescopic shaft ends of the fourth electric push rod (66) and the fifth electric push rod (67). A fourth electric push rod extension stop limit sensor (69) and a fifth electric push rod extension stop limit sensor (610) are provided on the side of the rotating cover opening cavity (61). The invention relates to a rotary cover opening chamber (61) and a rotary cover opening chamber (61) comprising a return stop limit sensor (611), a fifth electric push rod retract stop limit sensor (612) and a third motor reverse start limit sensor (618); the third motor reverse start limit sensor (618) is located in the direction of the right arc-shaped blade (65); the fourth electric push rod retract stop limit sensor (611) and the fifth electric push rod retract stop limit sensor (612) are located in the direction of the left arc-shaped blade (64); when the right arc-shaped blade (65) and the left arc-shaped blade (64) contact the rotary cover opening chamber (61), the right arc-shaped blade (65) triggers the third motor reverse start limit sensor (618), and the left arc-shaped blade (64) triggers the fourth electric push rod retract stop limit sensor (611) and the fifth electric push rod retract stop limit sensor (612).

7. The automatic clamping and opening device for coal powder sampling and testing bottles according to claim 6 is characterized in that: A fixing bolt (620) is provided at the middle of the top of the rotating shaft (616), and a limit pressing plate (56) is provided on the fixing bolt (620), and the limit pressing plate (56) can rotate around the fixing bolt (620); four studs (54) are arranged in a square shape, and the two ends of the limit pressing plate (56) respectively pass through between two studs (54) on the short sides of the square; a third motor forward rotation stop limit sensor (512), a fourth electric push rod extension start limit sensor (514) and a fifth electric push rod extension start limit sensor (516) are provided on the upper and lower sliding cavities (5). 515); the third motor forward rotation stop limit sensor (512) is located below one end of the limit pressure plate (56), the fourth electric push rod extension start limit sensor (514) and the fifth electric push rod extension start limit sensor (515) are located below the other end of the limit pressure plate (56), and when the limit pressure plate (56) is at the lowest point, both ends of the limit pressure plate (56) simultaneously trigger the third motor forward rotation stop limit sensor (512), the fourth electric push rod extension start limit sensor (514) and the fifth electric push rod extension start limit sensor (515).

8. The automatic clamping and opening device for coal powder sampling and testing bottles according to claim 7 is characterized in that: A third motor reverse stop limit sensor (58) and a second electric push rod extension start limit sensor (59) are provided at the bottom of the upper and lower sliding cavity (5); the third motor reverse stop limit sensor (58) and the second electric push rod extension start limit sensor (59) are located directly above the rotary cover opening cavity (61); when the rotary cover opening cavity (61) rises and contacts the upper and lower sliding cavity (5), the rotary cover opening cavity (61) triggers the third motor reverse stop limit sensor (58) and the second electric push rod extension start limit sensor (59).

9. The automatic clamping and opening device for coal powder sampling and testing bottles according to claim 8 is characterized in that: A top plate (41) is provided at the top of the cavity support (4), and a second electric push rod extension stop limit sensor (510), a third motor forward rotation start limit sensor (511), and a first electric push rod retraction start limit sensor (513) are provided at the top of the slider (517). The second electric push rod extension stop limit sensor (510), the third motor forward rotation start limit sensor (511), and the first electric push rod retraction start limit sensor (513) are located directly below the top plate (41). When the slider (517) slides upward and contacts the top plate (41), the top plate (41) triggers the second electric push rod extension stop limit sensor (510), the third motor forward rotation start limit sensor (511), and the first electric push rod retraction start limit sensor (513).

10. The automatic clamping and opening device for coal powder sampling and testing bottles according to claim 9 is characterized in that: A first electric push rod retraction stop limit sensor (24) is provided on the base (1), the first electric push rod retraction stop limit sensor (24) is located inside the cover (23), and the first electric push rod retraction stop limit sensor (24) is arranged in the displacement direction of the movable arc clamp seat (22); a fixed bracket (25) is provided on the base (1), and the first electric push rod (21) is mounted on the fixed bracket (25).

11. The automatic clamping and opening device for coal powder sampling and testing bottles according to claim 10 is characterized in that: The elastic force of the spring sleeved on the telescopic rod (33) is 50 to 55 kilograms, and the elastic force of the spring sleeved on the column (68) is 50 to 55 kilograms.

12. The automatic clamping and opening device for coal powder sampling and testing bottles according to claim 11 is characterized in that: The inner arc surfaces of the right arc-shaped blade (65) and the left arc-shaped blade (64) are rough anti-slip surfaces.

13. The automatic clamping and opening device for coal powder sampling and testing bottles according to claim 12 is characterized in that: When opening the cover, the operating steps are as follows: S1: placing the bottle body on the bottom plate (62) so that the bottle body is located between the fixed arc clamp seat (3) and the push arc clamp seat (2), the photoelectric sensor (26) on the cover shell (23) is triggered, so that the first electric push rod (21) extends, and the movable arc clamp seat (22) moves toward the bottle body, the movable arc clamp seat (22) pushes the bottle body to contact the arc sheet (32), and the arc sheet (32) is pushed inward and retracted. When the arc sheet (32) is completely retracted, the bottle body is clamped and fixed by the push arc clamp seat (2) and the movable arc clamp seat (22); S2: When the arc-shaped piece (32) is fully retracted, the first electric push rod is triggered to extend and stop the limit sensor 34 (34) and the second electric push rod is triggered to retract and start the limit sensor (35), thereby controlling the first electric push rod (21) to stop working and controlling the second electric push rod (42) to retract, thereby driving the upper and lower sliding cavities (5) to move downward; S3: the pressure plate (63) contacts the bottle cap when the upper and lower sliding chamber (5) moves downward, until the pressure plate (63) is pressed against the bottom plate (62) by the top of the bottle cap, triggering the second electric push rod retraction stop limit sensor (615), the fourth electric push rod retraction start limit sensor (613) and the fifth electric push rod retraction start limit sensor (614), the second electric push rod (42) stops retracting, and the fourth electric push rod (66) and the fifth electric push rod (67) retract inward, causing the left arc blade (64) and the right arc blade (65) to move inward until they contact the side of the bottle cap, thereby clamping the bottle cap; S4: When the left arc-shaped blade (64) and the right arc-shaped blade (65) contact the side of the bottle cap, the left arc-shaped blade (64) and the right arc-shaped blade (65) just contact the rotary cover opening cavity (61) and trigger the third motor reverse start limit sensor (618), the fourth electric push rod retract start limit sensor (613) and the fifth electric push rod retract start limit sensor (614), control the retraction movement of the fourth electric push rod (66) and the fifth electric push rod (67) to stop, and start the third motor (52) to start reverse rotation to drive the worm (51) to rotate, the worm (51) drives the worm wheel (53), the rotating shaft (616), and the rotary cover opening cavity (61) to rotate synchronously, and the bottle cap is rotated to loosen. During the loosening process, the external thread of the rotating shaft (616) cooperates with the threaded sleeve (516) to drive the bottle cap to move upward until the rotary cover opening cavity (61) contacts the upper and lower sliding cavity (5), and the bottle cap is completely separated from the bottle body; S5: When the cover opening cavity (61) is rotated to contact the upper and lower sliding cavity (5), the third motor reverse stop limit sensor (58) and the second electric push rod extension start limit sensor (59) are triggered, the third motor (52) is controlled to stop reverse rotation, and the second electric push rod (42) is controlled to extend, driving the upper and lower sliding cavity (5) to move upward; S6: When the up-and-down sliding cavity (5) moves upward to the highest point, the slider (517) contacts the top plate (41) to trigger the second electric push rod extension stop limit sensor (510), the third motor forward rotation start limit sensor (511) and the first electric push rod retraction start limit sensor (513), thereby controlling the second electric push rod (42) to stop extending and the first electric push rod (21) to start retracting, thereby releasing the bottle body. When the moving arc clamp seat (22) leaves the bottle body, the bottle body can be removed from the base (1); at the same time, the third motor (52) starts to rotate forward to drive the worm (51) to rotate, and the worm (51) drives the worm wheel (53) ), the rotating shaft (616), and the rotating cover opening cavity (61) rotate synchronously, and under the cooperation of the external thread of the rotating shaft (616) and the threaded sleeve (516), the rotating cover opening cavity (61) moves downward, driving the limit pressing plate (56) to move downward, and when the limit pressing plate (56) moves to the lowest position, the third motor forward rotation stop limit sensor (512), the fourth electric push rod extension start limit sensor (514) and the fifth electric push rod extension start limit sensor (515) are triggered, and the third motor (52) is controlled to stop forward rotation, and the fourth electric push rod and the fifth electric push rod (67) are started to extend outward, so as to loosen the bottle cap and remove the bottle cap; S7: When the first electric push rod (21) drives the movable arc clamp seat (22) to retract, the movable arc clamp seat (22) triggers the first electric push rod retraction stop limit sensor (24), and controls the first electric push rod (21) to stop retracting; during the extension process of the fourth electric push rod (66) and the fifth electric push rod (67), the telescopic ends respectively trigger the fourth electric push rod extension stop limit sensor (69) and the fifth electric push rod extension stop limit sensor (610), and control the fourth electric push rod (66) and the fifth electric push rod (67) to stop extending; and the resetting operation is completed.

14. The automatic clamping and opening device for coal powder sampling and testing bottles according to claim 13 is characterized in that: The first electric push rod retraction stop limit sensor (24), the fourth electric push rod extension stop limit sensor (69) and the fifth electric push rod extension stop limit sensor (610) are connected to a time relay to prevent a short-term connection phenomenon from directly connecting the circuit.

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