A pressure-maintaining type automatic unloading device

Abstract

The utility model discloses a kind of pressure-maintaining type automatic unloading devices, belong to powder production technical field, including the pipe body of upper and lower end open setting, the unloading plate frame of being provided with in pipe body is set to be inclined, and unloading plate frame is provided with a unloading passage in it;Unloading plate frame lower side is correspondingly attached with a unloading plate, and the high end of unloading plate is provided with a driving shaft, and driving shaft both ends are respectively rotationally connected in the ball bearing correspondingly set in pipe body both sides;Driving shaft both ends are respectively connected with the balance bar of identical direction, and every balance bar distal end is connected with counterweight hammer;Unloading plate is closed on unloading plate frame under the gravity of counterweight hammer;When the storage weight in storage cavity is greater than counterweight value, unloading plate is opened along the rotation of ball bearing by driving shaft, and unloading plate is automatically reset after material discharge and closes.The utility model is correspondingly connected in the lower end of drop forging pipe, and automatic material discharge and closure in the lower end of drop forging pipe are realized, and the negative pressure of maintaining mill tail is kept.

Description

Technical Field

[0001] This utility model relates to the field of powder production technology, and in particular to a pressure-holding type automatic unloading device for automatically discharging fine steel forgings in a ball mill and maintaining stable negative pressure. Background Technology

[0002] In the production process of coke powder ash, ball mills are required for fine grinding, and the production system is as follows: Figure 19 As shown, after entering the ball mill 01, the coke dust is mixed with steel forgings and ground. During this process, the steel forgings undergo long-term wear and their diameter decreases. The fine steel forgings, along with the finished dust, enter the mill tail 02 through the mill partition hole at the tail of the ball mill. The finished dust passes through the finished product screen set at the mill tail and enters the finished product pipeline 04, and is then transported to the finished product bin 09 by the cooperation of the Roots blower 05 and the conveying pipeline 08. Meanwhile, the fine steel forgings pass through the finished product screen and enter the steel forging drop pipe 06, falling into the steel forging collection bucket 07. A dust collection pipeline 03 connected to the finished product bin 09 is also set at the mill tail. A dust collector 010 is installed on the finished product bin 09. Because the lower end of the steel forging drop pipe 06 is designed with an opening, negative pressure leakage occurs at the mill tail, resulting in dust emission from the mill head and dust pollution. Utility Model Content

[0003] Technical problem to be solved: In view of the technical problems existing in the background technology, this utility model provides a pressure-holding type automatic unloading device. The unloading device is connected to the lower end of the steel forging pipe and realizes automatic discharge and sealing of the lower end of the steel forging pipe, maintaining the negative pressure at the grinding tail.

[0004] Technical solution: The present invention provides a pressure-holding automatic unloading device, comprising a tube body with open upper and lower ends, an inclined unloading plate frame disposed within the tube body, the unloading plate frame dividing the tube body into upper and lower corresponding storage cavities and unloading cavities, and an unloading channel disposed within the unloading plate frame.

[0005] A discharge plate is provided on the lower side of the discharge plate frame and in corresponding fit with the discharge channel. A drive shaft is provided at the high end of the discharge plate, and the two ends of the drive shaft are respectively rotatably connected to the ball bearings provided on both sides of the tube body.

[0006] The drive shaft has balance bars with the same direction connected to both ends on the outside of the tube, and each balance bar has a counterweight connected to its far end.

[0007] The unloading plate is closed on the unloading plate frame under the gravity of the counterweight; when the weight stored in the storage cavity is greater than the counterweight value, the unloading plate is opened by rotating along the ball bearing via the drive shaft, and the unloading plate automatically resets and closes after the material is discharged.

[0008] Preferably, the unloading plate includes two sets of hinge parts respectively arranged on both sides of the high end of the back side of the plate body. Each hinge part includes two hinge lugs arranged in parallel. The shaft of the drive shaft passes through the connecting channel formed by the four hinge lugs and is connected to the corresponding two hinge lugs by a pin.

[0009] The back side of the unloading plate is provided with a reinforcing grid corresponding to the unloading channel, and the front side of the plate is provided with a sealing gasket that matches the shape of the unloading channel.

[0010] Preferably, each end of the shaft is provided with a pin hole that extends through the diameter of the shaft;

[0011] The two ends of the shaft extend outward to form mounting end shafts, and a portion of the mounting end shaft is a square shaft.

[0012] The balance bar includes a bar body and a sleeve corresponding to one end of the bar body. The sleeve has a square hole that matches the shape of the square shaft.

[0013] Preferably, the counterweight is provided with a rod hole for the balance bar to pass through, and a locking through hole is provided on one side wall of the counterweight to connect the rod hole, and a fixing screw is connected in the locking through hole.

[0014] Preferably, the upper and lower ends of the pipe body are respectively provided with a first connecting flange and a second connecting flange.

[0015] Preferably, the pipe body is provided with an observation port on one side wall of the unloading cavity, and an observation door is connected to the observation port.

[0016] Preferably, a door seat groove is provided on one side of the tube body corresponding to the drive shaft, and a door seat is connected to the door seat groove, and the door seat fixes the drive shaft in the door seat groove.

[0017] Preferably, the tube body has a first half-shaft slot hole through it at the side wall corresponding to both ends of the door seat groove;

[0018] The tube body is horizontally provided with a support plate on the upper side of the door seat groove, and the outer side of the support plate is connected to an upper connecting plate with the same inclination angle as the unloading plate frame. The upper end of the unloading plate is correspondingly connected to the upper connecting plate.

[0019] The tube body is horizontally provided with a lower connecting plate on the lower side of the door seat groove, and the lower connecting plate and the upper connecting plate are respectively connected to mounting base connecting end plates at both ends.

[0020] Preferably, the door seat includes a sealing plate, and the sealing plate is provided with side end plates at both ends that are connected to the side wall of the tube body. The side end plates are provided with a second half-shaft slot corresponding to the first half-shaft slot, and the first half-shaft slot and the second half-shaft slot are respectively provided with semi-circular half-shaft sleeves in the circumferential direction. The side end plates and the outer side of the tube body side wall are provided with sealing discs and sealing caps corresponding to the drive shaft.

[0021] The upper and lower edges of the sealing plate are respectively provided with upper abutment plates and lower abutment plates corresponding to the upper connecting plate and the lower connecting plate, and the two ends of the upper abutment plates and the lower abutment plates respectively abut against the inner side of the mounting base connecting end plate.

[0022] Preferably, a mounting base is connected to the outer side of the mounting base connecting end plate. The mounting base includes a mounting plate, which is provided with a shaft hole for the drive shaft to pass through. A bearing seat plate is horizontally and vertically arranged on the mounting plate below the shaft hole. A reinforcing rib is provided on the lower side of the bearing seat plate and fixed to the mounting plate.

[0023] The bearing housing is fixedly provided on the bearing housing plate, and the ball bearing is correspondingly installed in the bearing housing. The bearing housing is provided with an oiling hole.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The unloading device is connected to the lower end of the steel forging pipe. It uses the weight of the steel forging to trigger the opening and closing, without manual intervention, to realize the automatic discharge of steel forging. The unloading plate and the unloading plate frame adopt a sealed structure to effectively prevent negative pressure leakage, maintain the negative pressure at the grinding tail, solve the problem of dust emission from the grinding head, and reduce dust pollution and manual operation risks.

[0026] 2. The door seat groove structure of the door seat and the tube body can be matched to realize convenient and efficient assembly and installation of the drive shaft and the unloading plate;

[0027] 3. This device is low in cost and easy to install, and is suitable for ball mills and other scenarios requiring enclosed falling objects. Attached Figure Description

[0028] Figure 1 This is a cross-sectional view of the unloading device of this application along the height direction;

[0029] Figure 2 for Figure 1 Cross-sectional view of the unloading device along half its width;

[0030] Figure 3 for Figure 1 Cross-sectional view of the central tube structure;

[0031] Figure 4 for Figure 2 Front view of the central tube structure;

[0032] Figure 5 for Figure 1 Schematic diagram of the middle portal frame structure ((a) front view; (b) end view);

[0033] Figure 6 for Figure 1 Schematic diagram of the unloading plate structure ((a) rear side view; (b) front side view);

[0034] Figure 7 for Figure 6 Sectional view of the unloading plate along direction AA;

[0035] Figure 8 for Figure 1 Schematic diagram of the drive shaft structure;

[0036] Figure 9 for Figure 8 Cross-sectional view of the central drive shaft along the CC direction;

[0037] Figure 10 for Figure 8 Cross-sectional view of the drive shaft along the DD direction;

[0038] Figure 11 for Figure 1 Schematic diagram of the middle balance bar structure ((a) front view; (b) top view);

[0039] Figure 12 for Figure 1 Schematic diagram of the counterweight structure ((a) axial sectional view; (b) end view);

[0040] Figure 13 for Figure 2 Schematic diagram of the mounting base structure ((a) front view; (b) top view);

[0041] Figure 14 for Figure 13 Sectional view of the central mounting base BB direction;

[0042] Figure 15 for Figure 1 Main view of the upper middle connecting plate structure;

[0043] Figure 16 for Figure 1 Main view of the unloading plate frame structure;

[0044] Figure 17 for Figure 1 Main view of the central support plate structure;

[0045] Figure 18 for Figure 1 Main view of the middle and lower side connecting plate structure

[0046] Figure 19 This is a schematic diagram of an existing coke powder and ash production system.

[0047] Reference numerals: 1. Pipe body; 101. First connecting flange; 102. Second connecting flange; 103. Upper connecting plate; 104. Door seat groove; 105. Unloading plate frame; 106. Storage cavity; 107. Unloading cavity; 108. First half-shaft slot; 109. Mounting base connecting end plate; 110. Observation port; 111. Support plate; 112. Lower connecting plate;

[0048] 2. Door seat; 201. Side end plate; 202. Second half-shaft slot; 203. Upper abutment plate; 204. Lower abutment plate; 205. Sealing plate; 206. Half-shaft sleeve;

[0049] 3. Unloading plate; 301. Plate body; 302. Hinge lug; 303. Reinforcing grating; 304. Sealing gasket;

[0050] 4. Drive shaft; 401. Shaft; 402. Pin hole; 403. Mounting end shaft; 404. Square shaft body; 405. Threaded end;

[0051] 5. Connecting pin;

[0052] 6. Balance bar; 601. Bar body; 602. Bar sleeve; 603. Square hole;

[0053] 7. Counterweight; 701. Rod hole; 702. Locking through hole;

[0054] 8. Fixing screws; 9. Observation door;

[0055] 10. Mounting base; 1001. Mounting plate; 1002. Bearing housing plate; 1003. Reinforcing rib; 1004. Shaft hole;

[0056] 11. Bearing housing; 12. Retaining nut; 13. Ball bearing; 14. Sealing disc; 15. Sealing gland;

[0057] 01. Ball mill; 02. Mill tail; 03. Dust collection pipeline; 04. Finished product pipeline; 05. Roots blower; 06. Forged steel pipe; 07. Forged steel collection bucket; 08. Conveying pipeline; 09. Finished product warehouse; 010. Dust collector. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be combined with... Figures 1-18The technical solutions of the embodiments of this utility model are clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0059] Example 1: As Figures 1-12 As shown, this utility model discloses a pressure-holding type automatic unloading device, including a pipe body 1 with open upper and lower ends, and an inclined unloading plate frame 105 disposed inside the pipe body 1. The unloading plate frame 105 divides the pipe body 1 into upper and lower corresponding storage cavities 106 and unloading cavities 107, and an unloading channel (e.g., Figure 16 (As shown). A discharge plate 3 is fitted to the discharge channel on the lower side of the discharge plate frame 105. A drive shaft 4 is installed at the high end of the discharge plate 3, and both ends of the drive shaft 4 are rotatably connected to ball bearings 13 installed on both sides of the tube body 1. The discharge plate 3 rotates along the ball bearings 13 at both ends via the drive shaft 4. Balance bars 6 with the same direction are connected to both ends of the drive shaft 4 on the outside of the tube body 1, and a counterweight 7 is connected to the far end of each balance bar 6. The discharge plate 3 closes on the discharge plate frame 105 under the negative pressure adsorption force inside the steel forging tube and the gravity of the counterweight 7. When the weight stored in the storage cavity 106 is greater than the counterweight value, the discharge plate 3 opens by rotating along the ball bearings 13 via the drive shaft 4. After the material is discharged, the discharge plate 3 automatically resets and closes. This discharge device is connected to the lower end of the steel forging tube and realizes automatic discharge and closure of the lower end of the steel forging tube, maintaining the negative pressure at the grinding tail.

[0060] like Figures 6-7 As shown, the unloading plate 3 includes two sets of hinges respectively arranged on both sides of the high end of the back side of the plate body 301. Each hinge includes two parallel hinge lugs 302, and the shaft 401 of the drive shaft 4 passes through the connecting channel formed by the four hinge lugs 302, and the shaft 401 is connected to the corresponding two hinge lugs 302 by a pin 5. This arrangement allows the drive shaft 4 and the unloading plate 3 to be detachably connected into an integral structure, which facilitates the replacement and maintenance of the drive shaft 4 or the unloading plate 3. A reinforcing grid 303 (e.g., ...) is provided on the back side of the plate body 301 of the unloading plate 3 corresponding to the unloading channel. Figure 6 As shown in (a), a sealing gasket 304 adapted to the shape of the unloading channel is provided on the front side of the plate 301 (as shown in (a)) to improve the structural strength of the unloading plate 3. Figure 6 (as shown in (b)).

[0061] like Figure 1 and Figure 8As shown, each end of the shaft 401 has a pin hole 402 that penetrates the diameter of the shaft 401. When the drive shaft 4 is fitted into the connecting channel formed between the corresponding hinge lugs 302, the pin 5 can be inserted into the pin hole 402 to achieve a fixed connection between the drive shaft 4 and the hinge lugs 302. Mounting shafts 403 extend outward from both ends of the shaft 401, and a portion of the mounting shaft 403 is a square shaft 404. A threaded end 405 is provided at the outer end of the square shaft 404. The balance bar 6 includes a rod body 601 and a rod sleeve 602 correspondingly provided at one end of the rod body 601. The rod sleeve 602 has a square hole 603 that matches the shape of the square shaft 404 (e.g., ...). Figure 11 As shown, the balance bar 6 is connected to the drive shaft 4 at a fixed angle, thereby preventing the balance bar 6 from rotating along the axis of the drive shaft 4 and affecting its counterweight effect.

[0062] like Figure 12 As shown, the counterweight 7 is provided with a rod hole 701 through which the rod body 601 of the balance bar 6 passes, and a locking through hole 702 communicating with the rod hole 701 is provided on one side wall of the counterweight 7. A fixing screw 8 is connected in the locking through hole 702. The counterweight 7 and the balance bar 6 can be fixedly connected by tightening the fixing screw 8; the counterweight 7 and the balance bar 6 can be separated by loosening the fixing screw 8. It should be noted that multiple counterweights 7 can be configured according to the needs to meet the adjustment of the storage capacity in the storage cavity 106 of the tube body 1.

[0063] like Figures 1-4 As shown, a first connecting flange 101 and a second connecting flange 102 are respectively provided at the upper and lower ends of the pipe body 1; the first connecting flange 101 is fixedly connected to the lower end of the steel forging pipe; the second connecting flange 102 can be fixedly connected to the inlet end of the steel forging collection bucket, or it can be directly fixedly connected to the closing plate 205. The unloading cavity 107 is used as a storage cavity, and the closing plate 205 is periodically opened to discharge the material. If the unloading cavity 107 is used as a storage cavity, an observation port 110 is provided on one side wall of the unloading cavity 107 (e.g., Figure 4 As shown), and an observation door 9 is connected to the observation port 110 (as shown). Figure 1 As shown in the figure, the situation inside the unloading chamber 107 can be observed through the observation door 9.

[0064] Example 2: Based on the technical solution described in Example 1, there is a problem of difficulty in assembling the drive shaft 4, the unloading plate 3, and the tube body 1. To improve the assembly efficiency of the drive shaft 4 and the unloading plate 3, in this example, as follows... Figures 1-5As shown, a door seat groove 104 is provided on one side of the tube body 1 corresponding to the drive shaft 4. A door seat 2 is connected to the door seat groove 104, and the door seat 2 fixes the drive shaft 4 in the door seat groove 104. First half-shaft slots 108 are formed through the tube body 1 at the corresponding side walls at both ends of the door seat groove 104. A support plate 111 is horizontally arranged on the upper side of the tube body 1 above the door seat groove 104. The shape of the support plate 111 is as follows... Figure 17 As shown, its inner arc-shaped groove is adapted to the shape of the inner wall of the pipe body 1, and its outer shape adopts right-angled sides to facilitate the fixed installation of the upper connecting plate 103; the outer side of the support plate 111 is connected to the upper connecting plate 103 with the same inclination angle as the unloading plate frame 105, and the high end of the unloading plate 3 is correspondingly connected to the upper connecting plate 103; the shape of the upper connecting plate 103 is as follows Figure 15 As shown, three sides of the tube are provided with connecting through holes to facilitate the fixed connection of the upper abutment plate 203 of the door seat 2. A lower connecting plate 112 is horizontally arranged on the lower side of the tube body 1 below the door seat groove 104. The shape of the lower connecting plate 112 is as follows... Figure 18 As shown, the shape of its inner groove matches the opening shape of the door seat groove 104 of the tube body 1, and satisfies the following conditions: Figure 6 The installation requirements for the unloading plate 3 are shown. Mounting base connecting end plates 109 (e.g., ...) are connected to both ends of the lower connecting plate 112 and the upper connecting plate 103. Figure 4 As shown, the mounting base connection end plate 109 facilitates the installation of the mounting base 10.

[0065] like Figure 4As shown, the gate seat 2 includes a sealing plate 205. The sealing plate 205 has side end plates 201 at both ends that are connected to the side wall of the tube body 1. The side end plates 201 and the first half-shaft slot 108 are respectively provided with second half-shaft slots 202. The first half-shaft slot 108 and the second half-shaft slot 202 are respectively provided with semi-circular half-shaft sleeves 206 in the circumferential direction. It should be noted that the inner diameter of the first half-shaft slot 108, the second half-shaft slot 202 and the half-shaft sleeves 206 are adapted to the outer diameter of the shaft of the drive shaft 4. After the gate seat 2 is installed in place, the first half-shaft slot 108 and the second half-shaft slot 202 are connected to form a circular hole for the drive shaft 4 to be installed through. The two half-shaft sleeves 206 are connected to form an annular protective sleeve to protect the drive shaft 4 at the connection point on the inner wall of the tube body 1, so as to reduce the blockage of the dust rotating part. A sealing disc 14 and a sealing cap 15 are provided on the side end plate 201 and the outer side wall of the tube body 1, corresponding to the drive shaft 4. After the drive shaft 4 and the door seat 2 are installed in place, the sealing disc 14 can be fixedly connected to the side wall of the tube body 1 by the fixing screw 8 through the end of the drive shaft 4 from the outside. Then, the sealing cap 15 is fixedly connected to the sealing disc 14 through the end of the drive shaft 4, thereby realizing the sealed assembly at the connection between the drive shaft 4 and the side wall of the tube body 1. An upper abutment plate 203 and a lower abutment plate 204 are provided on the upper and lower sides of the sealing plate 205, respectively, corresponding to the upper connecting plate 103 and the lower connecting plate 112. The two ends of the upper abutment plate 203 and the lower abutment plate 204 respectively abut against the inner side of the mounting base connecting end plate 109. The door seat 2 and the door seat groove 104 of the tube body 1 are structurally matched, which can facilitate the assembly and installation of the drive shaft 4 and the unloading plate 3 with the tube body 1.

[0066] like Figures 13-14 As shown, a mounting base 10 is connected to the outer side of the mounting base connecting end plate 109. The mounting base 10 includes a mounting plate 1001, which has a shaft hole 1004 for the drive shaft 4 to pass through. A bearing seat plate 1002 is horizontally and vertically arranged below the shaft hole 1004 on the mounting plate 1001. A reinforcing rib 1003 fixed to the mounting plate 1001 is provided on the lower side of the bearing seat plate 1002. A bearing seat 11 is fixedly arranged on the bearing seat plate 1002, and a ball bearing 13 is correspondingly fitted into the bearing seat 11. The bearing seat 11 is provided with an oiling hole, through which lubricating oil can be added to the bearing seat 11. After the drive shaft 4 and the door seat 2 are installed in place, the mounting base 10 is then connected to the mounting base connecting end plate 109 through the end of the drive shaft 4. Then, the bearing seat 11, the balance bar 6, and the fixing nut 12 are assembled and installed with the drive shaft 4 in sequence.

[0067] In this embodiment, the door seat groove 104 structure of the tube body 1 cooperates with the door seat 2 to realize the assembly and disassembly of the drive shaft 4 and the unloading plate 3, and reduces the assembly difficulty of the drive shaft 4 and the tube body 1.

[0068] It should be noted that the technical solution disclosed in Embodiment 2 is only a preferred and engineeringly feasible technical solution of this application; in addition, there are several alternative technical solutions based on the protection scope of this application. For example, the drive shaft 4 can adopt an inner and outer shaft body and bushing assembly structure. The bushing can be fixedly connected to the unloading plate 3. The shaft body adopts a bushing assembly structure, which can freely pass through the bushing along the axial direction and move coaxially with the bushing, thus satisfying the driving of the unloading plate 3. Moreover, both ends of the shaft body can be easily assembled and installed by ball bearings 13, which can also solve the assembly problem between the drive shaft 4 and the tube body 1. Those skilled in the art can improve or modify such technical solutions according to their needs, and will not be elaborated here.

[0069] In addition, it should be noted that the shape of the tube body 1 is not limited in Embodiments 1 and 2. It can be either a square structure or a circular structure, depending on the specific requirements. The door seat groove 104 and the door seat 2 structure can be adapted to the structure of the tube body 1.

[0070] The above are preferred embodiments of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A pressure-holding type automatic unloading device, characterized in that, The tube (1) includes an open tube body (1) with an upper and lower end. An inclined unloading plate frame (105) is provided inside the tube body (1). The unloading plate frame (105) divides the tube body (1) into an upper and lower corresponding storage cavity (106) and an unloading cavity (107). An unloading channel is provided inside the unloading plate frame (105). A discharge plate (3) is provided on the lower side of the discharge plate frame (105) in corresponding fit with the discharge channel. A drive shaft (4) is provided at the high end of the discharge plate (3), and the two ends of the drive shaft (4) are respectively rotatably connected to the ball bearings (13) provided on both sides of the tube body (1). The drive shaft (4) has two ends connected to balance bars (6) in the same direction on the outside of the tube (1), and each balance bar (6) has a counterweight (7) connected to its far end. The unloading plate (3) is closed on the unloading plate frame (105) under the gravity of the counterweight (7); when the weight stored in the storage cavity (106) is greater than the counterweight value, the unloading plate (3) is opened by rotating along the ball bearing (13) through the drive shaft (4), and the unloading plate (3) automatically resets and closes after the material is discharged.

2. The pressure-holding automatic unloading device according to claim 1, characterized in that, The unloading plate (3) includes two sets of hinge parts respectively arranged on both sides of the high end of the back side of the plate body (301). Each hinge part includes two parallel hinge lugs (302), and the shaft (401) of the drive shaft (4) passes through the connection channel formed by the four hinge lugs (302), and the shaft (401) is connected to the corresponding two hinge lugs (302) by the plug pin (5). The back side of the unloading plate (301) is provided with a reinforcing grid (303) corresponding to the unloading channel, and the front side of the plate (301) is provided with a sealing gasket (304) adapted to the shape of the unloading channel.

3. The pressure-holding type automatic unloading device according to claim 2, characterized in that, The shaft (401) has pin holes (402) at both ends that are through the diameter of the shaft (401). The shaft (401) extends outward at both ends to form a mounting end shaft (403), and a portion of the mounting end shaft (403) is a square shaft (404). The balance bar (6) includes a bar body (601) and a bar sleeve (602) correspondingly disposed at one end of the bar body (601). The bar sleeve (602) is provided with a square hole (603) that is adapted to the shape of the square shaft (404).

4. The pressure-holding type automatic unloading device according to claim 1, characterized in that, The counterweight (7) is provided with a rod hole (701) through which the rod body (601) of the balance bar (6) passes, and a locking through hole (702) connecting the rod hole (701) is provided on one side wall of the counterweight (7), and a fixing screw (8) is connected in the locking through hole (702).

5. The pressure-holding automatic unloading device according to claim 1, characterized in that, The upper and lower ends of the pipe body (1) are respectively provided with a first connecting flange (101) and a second connecting flange (102).

6. The pressure-holding type automatic unloading device according to claim 1, characterized in that, The pipe body (1) is provided with an observation port (110) on one side wall of the unloading cavity (107), and an observation door (9) is connected to the observation port (110).

7. The pressure-holding type automatic unloading device according to any one of claims 1-6, characterized in that, A door seat groove (104) is provided on one side of the tube (1) corresponding to the drive shaft (4), and a door seat (2) is connected to the door seat groove (104). The door seat (2) fixes the drive shaft (4) in the door seat groove (104).

8. The pressure-holding automatic unloading device according to claim 7, characterized in that, The tube (1) has a first half-shaft slot (108) through it at the side wall corresponding to both ends of the door seat groove (104). The tube body (1) is horizontally provided with a support plate (111) on the upper side of the door seat groove (104), and the outer side of the support plate (111) is connected with an upper connecting plate (103) with the same inclination angle as the unloading plate frame (105). The upper end of the unloading plate (3) is connected to the upper connecting plate (103). The tube body (1) is horizontally provided with a lower connecting plate (112) below the door seat groove (104), and the lower connecting plate (112) and the upper connecting plate (103) are respectively connected with mounting base connecting end plates (109).

9. The pressure-holding type automatic unloading device according to claim 8, characterized in that, The door seat (2) includes a sealing plate (205), and the sealing plate (205) is provided with side end plates (201) at both ends that are connected to the side wall of the tube body (1). The side end plates (201) are provided with a second half-shaft slot (202) corresponding to the first half-shaft slot (108), and the first half-shaft slot (108) and the second half-shaft slot (202) are respectively provided with semi-circular half-shaft sleeves (206) in the circumferential direction. The side end plates (201) and the outer side of the side wall of the tube body (1) are provided with a sealing disc (14) and a sealing cover (15) corresponding to the drive shaft (4). The upper and lower sides of the closed plate (205) are respectively provided with upper abutment plate (203) and lower abutment plate (204) corresponding to the upper connecting plate (103) and lower connecting plate (112), and the two ends of the upper abutment plate (203) and lower abutment plate (204) respectively abut against the inner side of the mounting base connecting end plate (109).

10. The pressure-holding type automatic unloading device according to claim 8, characterized in that, The mounting base connecting end plate (109) is connected to a mounting base (10) on the outside. The mounting base (10) includes a mounting plate (1001). The mounting plate (1001) is provided with a shaft hole (1004) for the drive shaft (4) to pass through. A bearing seat plate (1002) is horizontally and vertically arranged on the mounting plate (1001) below the shaft hole (1004). A reinforcing rib (1003) fixed to the mounting plate (1001) is provided on the lower side of the bearing seat plate (1002). A bearing seat (11) is fixedly provided on the bearing seat plate (1002), and the ball bearing (13) is correspondingly installed in the bearing seat (11), and the bearing seat (11) is provided with an oiling hole.

Images