Salt packaging and counting device

Abstract

The present application relates to packaging equipment, particularly a salt packaging and counting device. The device comprises a feeding slide plate installed on a swing mechanism, and first and second bag clamping mechanisms symmetrically arranged on the two sides of the rear of the swing mechanism. The first bag clamping mechanism comprises a bag clamping frame, which comprises a left clamping plate and a right clamping plate. The front ends of the two clamping plates are respectively fixed to the upper part of the bag clamping support frame. The rear parts of the two clamping plates are symmetrically provided with inverted U-shaped clamping grooves. The front swing door and the rear swing door are symmetrically hinged in the clamping grooves. The two swing doors are driven by the bag clamping cylinder outside the right clamping plate. The swing doors and the groove walls of the clamping grooves are provided with packaging bags. The first proximity switch and the second proximity switch are respectively installed on the two bag clamping mechanisms through switch supports. The two proximity switches, the swing cylinder and the electromagnetic reversing valve of the bag clamping cylinder are electrically connected with the control system. The present application can realize automatic counting packaging according to the set packaging quantity of the user. The packaging of small bags of salt is not damaged and salt leakage is reduced, thereby reducing the cost.

Description

TECHNICAL FIELD

[0001] The present application relates to packaging equipment, in particular to a salt packaging and counting device. BACKGROUND

[0002] At present, the salt packaging production line is a continuous production line, and the production line only has one packaging bag supporting mechanism. The small salt bags are conveyed to the packaging bag supporting mechanism from the conveying belt, and the production line is installed with a counter for counting. The packaging bag supporting mechanism cannot realize counting, and can only realize continuous counting. The automatic counting of the packaging cannot be realized according to the set packaging quantity of the user. When the packaging bag supporting mechanism fails, the production line must be stopped for maintenance. The Chinese patent for invention with the authorized announcement number CN203318797U discloses a salt packaging device. The device includes a conveying belt and a bag separating machine. The bag separating machine is arranged at a downstream position of the conveying belt, and includes a rack and a bag separating disc installed on the rack. A guide strip is installed on the bag separating disc. The small salt bags are pushed by the guide strip. The device cannot count the large packaging bags, and cannot realize the automatic counting of the packaging according to the set packaging quantity of the user. When the guide strip pushes the small salt bags, the small packaging bags are easily broken and the salt is leaked. SUMMARY

[0003] The present application aims to solve the above technical problems, and provides a salt packaging and counting device. The automatic counting of the packaging can be realized according to the set packaging quantity of the user, and the continuous production is ensured.

[0004] The present application solves the technical problems by adopting the following technical scheme:

[0005] A salt packaging and counting device includes an inclined chute-shaped discharging slide plate. The discharging slide plate is located below the discharging end of a conveying belt. The discharging slide plate is installed on a swing mechanism. First and second bag clamping mechanisms are symmetrically arranged at the back of the swing mechanism. The first bag clamping mechanism includes a bag clamping frame, a front swing door, a rear swing door and a bag clamping cylinder. The bag clamping frame includes left and right clamping plates vertically arranged on the plate surface. The front ends of the two clamping plates are respectively fixed to the upper part of the bag clamping support frame. The rear parts of the two clamping plates are symmetrically provided with inverted U-shaped clamping grooves. The front and rear swing doors are symmetrically hinged in the clamping grooves. The two swing doors are driven by the bag clamping cylinder outside the right clamping plate. The packaging bags are placed between the swing doors and the groove walls of the clamping grooves. First and second proximity switches are respectively installed on the two bag clamping mechanisms through switch supports. The two proximity switches, the swing cylinder and the electromagnetic reversing valve of the bag clamping cylinder are electrically connected with a control system.

[0006] Compared with the prior art, the present application has the following beneficial effects:

[0007] The first proximity switch and the second proximity switch control the start counting of the first bag clamping mechanism and the second bag clamping mechanism, and can realize automatic counting of the package according to the package quantity set by the user; the swing mechanism and the discharging slide plate prevent the small-bag salt package from being damaged and leaking salt, and reduce the cost.

[0008] Further, the optimization scheme of the present application is:

[0009] The swing mechanism comprises a swing support, a swing cylinder, a swing shaft and a bracket. The swing support is vertically arranged, and the swing cylinder is fixed to the lower part of the front side of the swing support. The swing cylinder is connected with the lower end of the swing shaft, and the upper part of the swing shaft is rotationally connected with the swing support. The bracket is installed on the upper end of the swing support, and the bracket is an equilateral triangle. A vertical sleeve is fixed to the top corner of the bracket, and the sleeve is sleeved on the upper end of the swing shaft.

[0010] The feeding end of the discharging slide plate is provided with a supporting plate part which is matched with the bracket. The supporting plate part of the discharging slide plate and the bottom plate of the discharging slide plate are installed on the bracket.

[0011] Front connecting plates and rear connecting plates are respectively fixed between the groove walls of the clamping grooves of the left clamping plate and the right clamping plate. Front pressing plates and rear pressing plates are respectively fixed to the opposite sides of the front connecting plates and the rear connecting plates. The front pressing plates and the rear pressing plates are respectively matched with the front swing door and the rear swing door to clamp the packaging bag.

[0012] Front horizontal hinged fixing plates and rear horizontal hinged fixing plates are fixed between the left clamping plate and the right clamping plate. The front hinged fixing plates are located above the front ends of the groove bottoms of the clamping grooves of the left clamping plate and the right clamping plate. The rear hinged fixing plates are located above the rear ends of the groove bottoms of the clamping grooves of the left clamping plate and the right clamping plate.

[0013] The front swing door comprises a swing plate, a left end plate, a right end plate and an ear seat. The swing plate is horizontally arranged below the front hinged fixing plate, and the swing plate is hinged with the front hinged fixing plate. The two ends of the swing plate are respectively fixed with the left end plate and the right end plate which are right-angled triangles. The left end plate and the right end plate are respectively located outside the left clamping plate and the right clamping plate. The outer sides of the right end plates of the front swing door and the rear swing door are respectively symmetrically fixed with L-shaped ear seats. The two ear seats are hinged with the bag clamping cylinder. The swing plate of the front swing door and the swing plate of the rear swing door are V-shaped.

[0014] Two adjacent acute angles of the left end plate and the right end plate at the two ends of the front swing door and the rear swing door are respectively chamfered.

[0015] The switch support comprises a rotating arm, a pin shaft, an upper support and an upper connecting plate. The cross section of the rotating arm is rectangular, and the rotating arm is longitudinally arranged. The upper part of the front end of the rotating arm is fixed with a horizontal shaft sleeve. The upper support is inverted U-shaped, and is sleeved on the rotating arm. The two side plates of the upper support are connected with the shaft sleeve of the rotating arm through the pin shaft. A limit switch is installed in the upper support. The side plate of the upper support at the rear end of the rotating arm is provided with a limiting screw. The upper support is connected with the left clamping plate through the upper connecting plate. The touch rod of the limit switch extends out of the horizontal part of the upper support and the upper connecting plate.

[0016] The control system comprises a PLC, a display instrument, a first button, a second button, a third button, a counting photoelectric switch, the PLC is in communication with the display instrument, output ends of the first button, the second button and the third button are electrically connected with corresponding terminals of the PLC respectively, and signal terminals of the counting photoelectric switch, the first proximity switch and the second proximity switch are electrically connected with corresponding terminals of the PLC respectively. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the whole structure schematic view of the embodiment of the application;

[0018] Figure 2 It is the top view of Figure 1 ;

[0019] Figure 3 It is the left view of Figure 1 ;

[0020] Figure 4 It is the swing mechanism schematic view of the embodiment of the application;

[0021] Figure 5 It is the front view of the swing support of the embodiment of the application;

[0022] Figure 6 It is the left view of Figure 5 ;

[0023] Figure 7 It is the front view of the swing cylinder of the embodiment of the application;

[0024] Figure 8 It is the top view of Figure 7 ;

[0025] Figure 9 It is the front view of the swing shaft of the embodiment of the application;

[0026] Figure 10 It is the A-A sectional view of Figure 9 ;

[0027] Figure 11 It is the front view of the bracket of the embodiment of the application;

[0028] Figure 12 It is the top view of Figure 11 ;

[0029] Figure 13 It is the front view of the blanking slide plate of the embodiment of the application;

[0030] Figure 14 It is the top view of Figure 13 ;

[0031] Figure 15This is a front view of the bag clamping mechanism according to an embodiment of the present invention;

[0032] Figure 16 yes Figure 15 Top view;

[0033] Figure 17 This is a front view of the connection between the bag clamp and the swing door according to an embodiment of the present invention;

[0034] Figure 18 yes Figure 17 Top view;

[0035] Figure 19 This is a front view of the bag clamping frame according to an embodiment of the present invention;

[0036] Figure 20 yes Figure 19 Top view;

[0037] Figure 21 This is a front view of the pressure plate according to an embodiment of the present invention;

[0038] Figure 22 yes Figure 21 BB section view;

[0039] Figure 23 This is a front view of the swing gate according to an embodiment of the present invention;

[0040] Figure 24 yes Figure 23 Top view;

[0041] Figure 25 yes Figure 23 The left view;

[0042] Figure 26 This is a front view of the connection between the proximity switch and the switch bracket according to an embodiment of the present invention;

[0043] Figure 27 yes Figure 26 Top view;

[0044] Figure 28 yes Figure 26 The left view;

[0045] Figure 29 This is the front view of the rotating arm of the switch bracket;

[0046] Figure 30 yes Figure 29 Top view;

[0047] Figure 31 yes Figure 29 The left view;

[0048] Figure 32 This is a schematic diagram of the control system according to an embodiment of the present invention.

[0049] In the figure: conveyor 1; swing bracket 2; support plate 2-1; swing cylinder 3; swing shaft 3-1; bearing seat 3-2; bracket 4; front waist plate 4-1; rear waist plate 4-2; right connecting plate 4-3; sleeve 4-4; rib plate 4-5; blanking slide 5; supporting plate 5-1; groove bottom plate 5-2; first bag clamping mechanism 6; second bag clamping mechanism 7; bag clamping support frame 8; bag clamping frame 9; left clamping plate 9-1; right clamping plate 9-2; front connecting plate 9-3; rear connecting plate 9-4; front pressing plate 9-5; rear pressing plate 9-6; front hinged fixed plate 9-7; rear hinged fixed plate 9-8; connecting rib plate 9-9; clamping groove 9-10; front swing door 10; swing plate 10-1; left end plate 10-2; right end plate 10-3; ear seat 10-4; rear swing door 11; bag clamping cylinder 12; switch support 13; rotating arm 13-1; shaft sleeve 13-2; pin shaft 13-3; upper support 13-4; upper connecting plate 13-5; limiting screw 13-6; vertical plate 13-7; first proximity switch 14; touch rod 14-1; second proximity switch 15; PLC 16; display instrument 17; first button 18; second button 19; third button 20; counting photoelectric switch 21; DC power supply 22. DETAILED DESCRIPTION

[0050] The present application will be further described in detail below with reference to the accompanying drawings and examples.

[0051] Reference Figures 1-3 The present embodiment is a salt packaging and counting device, which is composed of a swing mechanism, a first bag clamping mechanism, a second bag clamping mechanism, a switch support 13, a first proximity switch 14, and a second proximity switch 15. The swing mechanism is installed below the discharge end of the conveyor belt of the conveyor 1, and is composed of a swing bracket 2, a swing cylinder 3, a swing shaft 3-1, a bearing seat 3-2, and a bracket 4. Figures 4-12 As shown in the figure, the swing bracket 2 is a channel steel welded member, with its notch facing backward, and a horizontal support plate 2-1 welded to the middle and lower part of the front side of the groove bottom. The swing cylinder 3 is installed on the support plate 2-1, with its output shaft vertically arranged. The output shaft of the swing cylinder 3 is installed in the central shaft hole at the lower end of the swing shaft 3-1, and is connected to the swing shaft 4 through a key. The swing shaft 4 is vertically arranged, with its upper end connected to the swing bracket 2 through the bearing seat 3-2.

[0052] A bracket 4 is installed at the upper end of the swing shaft 3-2. The end face of the bracket 4 is an equilateral triangle, which is composed of a front waist plate 4-1, a rear waist plate 4-2, a left connecting plate, a right connecting plate 4-3, a sleeve 4-4, and stiffeners 4-5. The left and right ends of the front waist plate 4-1 and the rear waist plate 4-2 are respectively welded with triangular left connecting plates (not shown in the figure) and right connecting plates 4-3. The sleeve 4-4, with its vertical axis, is welded inside the apex of the bracket 4. Four stiffeners 4-5 are welded between the sleeve 4-4 and the front waist plate 4-1, the rear waist plate 4-2, the left connecting plate, and the right connecting plate 4-3, respectively. The four stiffeners 4-5 are in a cross shape. The unloading slide plate 5 is installed on the bracket 4. Figure 13 , Figure 14 As shown, the unloading slide plate 5 is trough-shaped, with its rear end inclined downwards, serving as the outlet. Its front end has a support plate 5-1. The angle between the support plate 5-1 and the bottom plate 5-2 of the unloading slide plate 5 is equal to the angle of the apex angle of the bracket 4. The front end of the bottom plate 5-2 and the support plate 5-1 of the unloading slide plate 5 are mounted on the bracket 4. The swing cylinder 3 drives the swing shaft 3-1 to swing left and right, which in turn drives the bracket 4 and the unloading slide plate 5 to swing left and right.

[0053] A first bag clamping mechanism 6 and a second bag clamping mechanism 7 are symmetrically installed on both sides behind the swing mechanism. The first bag clamping mechanism 6 is located on the right side, and the second bag clamping mechanism 7 is located on the left side. The first bag clamping mechanism 6 and the second bag clamping mechanism 7 have the same structure and are within the swing range of the feeding slide plate 5. The first bag clamping mechanism 6 consists of a bag clamping support frame 8, a bag clamping frame 9, a front swing door 10, a rear swing door 11, and a bag clamping cylinder 12, etc. Figures 15-17 As shown), the bag clamping support frame 8 is a welded channel steel component, vertically arranged, and is constructed by welding two sections of channel steel with opposite grooves. Bag clamping frame 9 ( Figures 19-22 As shown, the bag clamping frame 9 is installed on the upper part of the bag clamping support frame 8. It consists of a left clamping plate 9-1, a right clamping plate 9-2, a front connecting plate 9-3, a rear connecting plate 9-4, a front pressure plate 9-5, a rear pressure plate 9-6, a front hinge fixing plate 9-7, a rear hinge fixing plate 9-8, and connecting ribs 9-9. The left clamping plate 9-1 and the right clamping plate 9-2 are vertically oriented and symmetrically parallel. The front ends of the left clamping plate 9-1 and the right clamping plate 9-2 are installed on the left and right sides of the upper part of the bag clamping support frame 8.

[0054] The left and right card plates 9-1 and 9-2 have symmetrically arranged inverted U-shaped slots 9-10 at their rear. The lower ends of the slot walls of these slots 9-10 are symmetrically welded with strip-shaped front connecting plates 9-3 and rear connecting plates 9-4. Strip-shaped front pressure plates 9-5 and rear pressure plates 9-6 are respectively installed on the opposite sides of the front and rear connecting plates 9-3 and 9-4. The front and rear pressure plates 9-5 and 9-6 are made of nylon. The left and right card plates 9-1 and 9-2 are welded with transverse front hinge fixing plates 9-7 and rear hinge fixing plates 9-8. The front hinge fixing plate 9-7 is located above the front end of the slot bottom of the left and right card plates 9-10, and the rear hinge fixing plate 9-8 is located above the rear end of the slot bottom of the left and right card plates 9-10. The front hinge fixing plate 9-7 and the rear hinge fixing plate 9-8 are strip-shaped, and the plates of the front hinge fixing plate 9-7 and the rear hinge fixing plate 9-8 are vertically arranged. The connecting stiffener 9-9 is welded between the left clamping plate 9-1 and the right clamping plate 9-2 on the front side of the front hinge fixing plate 9-7.

[0055] A symmetrical front swing door 10 and a rear swing door 11 are installed inside the bag clamping frame 9. The front swing door 10 and the rear swing door 11 are horizontally positioned between the left clamping plate 9-1 and the right clamping plate 9-2. The front swing door 10 and the rear swing door 11 are bottom-opening and have the same structure. Front swing door 10 ( Figures 23-25 (As shown) It is composed of a swing plate 10-1, a left end plate 10-2, a right end plate 10-3, and an ear seat 10-4. The swing plate 10-1 is horizontally positioned below the front hinge fixing plate 9-7. The long side of the upper end of the swing plate 10-1 is hinged to the long side of the lower end of the front hinge fixing plate 9-7 via a hinge. The left end plate 10-2 and the right end plate 10-3 are welded to the left and right ends of the swing plate 10-1, respectively. The left end plate 10-2 and the right end plate 10-3 are right-angled triangles. The left end plate 10-2 and the right end plate 10-3 of the front swing door 10 and the rear swing door 11 are set facing each other at right angles. The swing plate 10-1 is located in the upper middle part of the hypotenuse of the left end plate 10-2 and the right end plate 10-3. The left end plate 10-2 and the right end plate 10-3 are located outside the left card plate 9-1 and the right card plate 9-2, respectively. When the front swing door 10 and the rear swing door 11 are in the closed state, the swing plates 10-1 of the front swing door 10 and the rear swing door 11 are V-shaped. The vertical angle sides of the two left end plates 10-2 and the two right end plates 10-3 on the same side are close to each other and coincide with the longitudinal center line of the slot 9-10. The horizontal right angle sides of the two left end plates 10-2 and the two right end plates 10-3 on the same side are located on the same horizontal plane.

[0056] The upper part of the right end plate 10-2 of the front swing door 10 and the right end plate 10-2 of the rear swing door 11 is symmetrically welded with an L-shaped ear seat 10-4, and the end of the piston rod of the bag clamping cylinder 12 is installed with an ear plate which is hinged with the ear seat 10-4 of the front swing door 10 through a pin shaft, and the cylinder body of the bag clamping cylinder 12 is hinged with the ear seat 10-4 of the rear swing door 11 through a pin shaft. The bag clamping cylinder 12 controls the opening and closing of the front swing door 10 and the rear swing door 11, and when the front swing door 10 and the rear swing door 11 are opened, the swing plate 10-1 of the front swing door 10 cooperates with the front pressing plate 9-5, and the swing plate 10-1 of the rear swing door 11 cooperates with the rear pressing plate 9-6, so as to clamp the bag opening of the packaging bag.

[0057] The outer side of the left clamping plate 9-1 of the first bag clamping mechanism and the second bag clamping mechanism is respectively installed with a switch bracket 13, which is composed of a rotating arm 13-1, a shaft sleeve 13-2, a pin shaft 13-3, an upper bracket 13-4, an upper connecting plate 13-5, a limiting screw 13-6, a vertical plate 13-7 and a supporting plate 13-8, etc. Figures 26-31 The rotating arm 13-1 is a rectangular tube, and the upper part of the front end of the rotating arm 13-1 is provided with a transverse shaft sleeve 13-2 which is welded with the rotating arm 13-1 through the vertical plate 13-7, and the upper part of the front end of the rotating arm 13-1 is welded with a horizontal supporting plate 13-8. The upper bracket 13-4 is inverted U-shaped, and the lower part of the front end of the two side plates thereof is stepped structure, which is sleeved on the rotating arm 13-1, and the two side plates of the upper bracket 13-4 are hinged with the shaft sleeve 13-2 of the rotating arm 13-1 through the pin shaft 13-3, and the side plates of the upper bracket 13-4 at the front end of the rotating arm 13-1 are installed with the limiting screw 13-6 for the rotating arm 13-1. The first proximity switch 14 is installed in the upper bracket 13-4 of the first bag clamping mechanism 6, and the first proximity switch 14 is located above the rotating arm 13-1, and the rotating arm 13-1 below the first proximity switch 14 is welded with the supporting plate 13-8, and the first proximity switch 14 is fixedly connected with the side plates of the upper bracket 13-4 through screws, and the upper bracket 13-4 is installed on the bottom surface of the horizontal upper connecting plate 13-5, and the upper connecting plate 13-5 is welded with the right clamping plate 9-2. The touch rod 14-1 of the first proximity switch 14 extends out of the horizontal part of the upper bracket 13-4 and the upper connecting plate 13-5, and the second proximity switch 15 is installed in the upper bracket 13-4 of the second bag clamping mechanism.

[0058] The first proximity switch 14 and the second proximity switch 15 are electrically connected with the control system which is composed of a PLC 16, a display instrument 17, a first button 18, a second button 19, a third button 20, a counting photoelectric switch 21 and a direct current power supply 22, etc. Figure 32As shown in the figure), PLC 16 communicates with display instrument 17 through 485 communication cable, and electromagnetic reversing valve of swing cylinder 3 and bag clamping cylinder 12 are controlled by PLC. First button 18, second button 19 and third button 20 are installed on the electrical box beside first bag clamping mechanism 6 and second bag clamping mechanism 7, and first button 18, second button 19 and third button 20 are red, green and yellow respectively. Input end of first button 18, second button 19 and third button 20 is electrically connected with direct current power supply 22 respectively, and output end of first button 18, second button 19 and third button 20 is electrically connected with corresponding terminal of PLC 16 respectively. Signal line of counting photoelectric switch 21, first proximity switch 14 and second proximity switch 15 is electrically connected with corresponding terminal of PLC 16 respectively, and counting photoelectric switch 21 is used for counting small bag salt package on conveying belt 1. First button 18 is a shift button, and first button 18 is pressed to loosen bag of bag clamping mechanism corresponding to position of blanking slide 5, and blanking slide 5 is shifted. Second button 19 is a bag loosening button of second bag clamping mechanism 7, and second button 19 can be pressed at any time to loosen bag when blanking slide 5 is not on the side. Third button 20 is a bag loosening button of first bag clamping mechanism 6, and third button 20 can be pressed at any time to loosen bag when blanking slide 5 is not on the side. First proximity switch 14 and second proximity switch 15 respectively sense bag clamping and bag loosening of first bag clamping mechanism and second bag clamping mechanism.

[0059] The operation process of the embodiment is as follows:

[0060] Bag clamping: after the bag opening of the packaging bag is put into the front pressing plate 9-5 and the rear pressing plate 9-6 of the bag clamping mechanism, the proximity switch on the side is lightly touched, the bag clamping mechanism automatically clamps the packaging bag, the swing cylinder 3 drives the blanking slide 5 to turn to the bag clamping mechanism on the side, the conveying belt 1 conveys the small bag salt, and the small bag salt enters the large packaging bag from the blanking slide 5;

[0061] If the bag clamping mechanism corresponding to the position of the blanking slide 5 is in the clamping state, the system starts to automatically count; during this period, the packaging bag should be timely sleeved on the bag clamping mechanism on the other side. When the counting value reaches the set value, the current bag clamping mechanism loosens the bag, the blanking slide 5 automatically shifts, and the total yield value increases by 1. At this time, the full bag large bag package is taken away, and the bag is sleeved in time, and after the blanking slide 5 turns back, automatic counting is waited.

[0062] Parameter value setting:

[0063] Counting value setting: press the SET key of the control panel of display instrument 17, the counting set value becomes reverse white display, at this time, the new set value can be input, and then press the ENT key to confirm. Before pressing the ENT key, the current operation can be exited at any time by pressing the ESC key.

[0064] Total production value clear: according to the control panel ▼ key, switch to another interface, press CLR key, total production value clear. Then press ▲ key, the system returns to the main interface.

[0065] The application can realize automatic counting of the package according to the set package quantity of the user, and the swing mechanism and the blanking slide prevent the small-bag salt package from being damaged and leaking salt, and reduce the cost.

[0066] The above merely describes preferred embodiments of the present application, but should not be used to limit the scope of the present application, and equivalent structural changes made by applying the content of the present application specification and drawings are included in the scope of the present application.

Claims

1. A salt packaging and counting device, comprising a chute-shaped blanking slide arranged obliquely below the discharge end of a conveying belt, characterized in that: the blanking slide is mounted on a swing mechanism driven by a swing cylinder, and first and second bag clamping mechanisms are symmetrically arranged at the back of the swing mechanism; the first bag clamping mechanism comprises a bag clamping frame, a front swing door, a rear swing door and a bag clamping cylinder, the bag clamping frame comprises left and right clamping plates vertically arranged on the plate surface, the front ends of the two clamping plates are respectively fixed to the upper part of the bag clamping support frame, the rear parts of the two clamping plates are symmetrically provided with inverted U-shaped clamping grooves, the front swing door and the rear swing door are symmetrically hinged in the clamping grooves, the two swing doors are driven by the bag clamping cylinder outside the right clamping plate, and the bag clamping frame is arranged between the swing doors and the groove walls of the clamping grooves; first and second proximity switches are respectively mounted on the two bag clamping mechanisms through switch supports, the two proximity switches, the swing cylinder and the electromagnetic reversing valve of the bag clamping cylinder are electrically connected with the control system; switch supports are respectively mounted outside the left clamping plates of the first and second bag clamping mechanisms, the switch support comprises an arm, a shaft sleeve, a pin shaft, an upper support, an upper connecting plate, a limiting screw, a vertical plate and a supporting plate, the arm is a rectangular tube, a horizontal shaft sleeve is arranged at the upper part of the front end of the arm, the shaft sleeve is welded with the arm through the vertical plate, and a horizontal supporting plate is welded at the upper part of the front end of the arm; the upper support is inverted U-shaped, the lower part of the front end of the two side plates of the upper support is a stepped structure, the upper support is sleeved on the arm, the two side plates of the upper support are hinged with the shaft sleeve of the arm through the pin shaft, the side plate of the upper support at the front end of the arm is provided with the limiting screw for the arm; the first proximity switch is mounted in the upper support of the first bag clamping mechanism, the first proximity switch is located above the arm, the arm below the first proximity switch is welded with the supporting plate, the first proximity switch is fixedly connected with the side plate of the upper support through a screw, the upper support is mounted on the bottom surface of the horizontal upper connecting plate, the upper connecting plate is welded with the right clamping plate, the touch rod of the first proximity switch extends out of the horizontal part of the upper support and the upper connecting plate, and the second proximity switch is mounted in the upper support of the second bag clamping mechanism; front and rear connecting plates are respectively fixedly connected between the groove walls of the clamping grooves of the left and right clamping plates, front and rear pressing plates are respectively fixedly connected to the opposite sides of the front and rear connecting plates, and the front and rear pressing plates are respectively matched with the front and rear swing doors to clamp the packaging bag. the swing mechanism comprises a swing support, a swing cylinder, a swing shaft and a bracket, the swing support is vertically arranged, the swing cylinder is fixedly connected to the lower part of the front side of the swing support, the swing shaft is connected with the lower end of the swing cylinder, and the upper part of the swing shaft is rotationally connected with the swing support; the bracket is mounted on the upper end of the swing support, and the bracket is an equilateral triangle, a vertical sleeve is fixedly connected to the top corner of the bracket, and the sleeve is sleeved on the upper end of the swing shaft.

2. The salt packaging and counting device according to claim 1, characterized in that: the feeding end of the blanking slide is provided with a supporting plate part matched with the bracket, and the supporting plate part of the blanking slide and the bottom plate of the blanking slide are mounted on the bracket.

3. A salt packaging and counting device according to claim 1 or 2, characterized in that: front and rear horizontal hinge fixing plates are fixedly connected between the left and right clamping plates, the front hinge fixing plate is located above the front end of the groove bottom of the clamping groove of the left and right clamping plates, and the rear hinge fixing plate is located above the rear end of the groove bottom of the clamping groove of the left and right clamping plates.

4. The salt packaging and counting device according to claim 1, characterized in that: ​ 5. The salt packaging and counting device according to claim 1, characterized in that: The front swing door comprises a swing plate, a left end plate, a right end plate and an ear seat, the swing plate is horizontally arranged below the front hinged fixed plate, the swing plate is hinged with the front hinged fixed plate, two ends of the swing plate are fixedly connected with the left end plate and the right end plate of a right triangle respectively, and the left end plate and the right end plate are respectively located outside the left clamping plate and the right clamping plate; the outer side surfaces of the right end plates of the front swing door and the rear swing door are respectively symmetrically fixedly connected with L-shaped ear seats, a bag clamping air cylinder is hinged between the two ear seats, and the swing plate of the front swing door and the swing plate of the rear swing door are V-shaped.

6. The salt packaging and counting device according to claim 5, characterized in that: Two adjacent acute angles of the left end plate and the right end plate at two ends of the front swing door and the rear swing door are respectively chamfered.

7. The salt packaging and counting device according to claim 1, characterized in that: The control system comprises a PLC, a display instrument, a first button, a second button, a third button and a counting photoelectric switch, the PLC communicates with the display instrument, output ends of the first button, the second button and the third button are electrically connected with corresponding terminals of the PLC respectively, and signal terminals of the counting photoelectric switch, a first proximity switch and a second proximity switch are electrically connected with corresponding terminals of the PLC respectively.

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