Screw machine discharge gate and discharge pressure relief method

Abstract

The present application provides a kind of spiral machine earth discharge gate and earth discharge pressure relief method, including connecting sleeve, gate sealing device, door leaf sealing device, opening adjusting device, pressure relief control device and other devices, the two sides of connecting sleeve can be sealed respectively by gate sealing device and door leaf sealing device, double sealing effect can be achieved, avoid liquid leakage, at the same time, the problem of poor sealing effect caused by long-term wear of gate sealing device is overcome;At the same time, when the pressure in the connecting sleeve exceeds the set limit range, the locking state of the opening adjusting device can be controlled according to the pressure detection result by the pressure relief control device at this time.The present application can perform secondary sealing on the outside of the earth discharge gate, enhance the overall sealing effect, and also can perform pressure relief warning when the pressure increases beyond the limit load, to avoid safety accidents.

Description

Technical Field

[0001] This invention relates to the field of gate technology, and in particular to a screw conveyor discharge gate and a method for discharge and pressure relief. Background Technology

[0002] As a key component for controlling the pressure of the sealed chamber, the screw conveyor of the tunnel boring machine has very high requirements for its sealing performance. The slag discharge port of the screw conveyor is equipped with a soil discharge gate to control the sealing effect of the slag discharge port. The opening of the soil discharge gate is adjusted by sliding, thereby effectively controlling the amount of soil discharged, achieving the purpose of controlling the pressure of the soil chamber, and ultimately ensuring the normal tunneling of the tunnel boring machine.

[0003] However, when the discharge gate is adjusted, the gate plate is not fully open. The end of the gate plate is exposed to the medium for a long time, which causes the gate plate to wear, the main seal to fail, and the service life of the gate to be shortened. When the screw conveyor is stopped and the gate needs to be closed to maintain the pressure in the soil chamber, the gate plate inside the gate has failed and cannot achieve the sealing function after closing, which brings the safety hazard of mud and water spraying. The gate leaf sealing device is installed on the outside of the discharge gate to achieve secondary sealing. Moreover, the rotating gate leaf will not be continuously subjected to the impact of the load, which can ensure a good sealing effect.

[0004] When the door sealing device is in a sealed state, the pressure inside the pressure chamber increases under certain construction conditions. The mud and sand mixture breaks through the soil discharge plate and enters one side of the door. At this time, due to the strong sealing effect of the door, its internal pressure gradually increases. Since the door side lacks a suitable pressure relief and alarm structure, when the pressure inside the door increases to the point of exceeding the material's limit load, the overall structure suddenly fails, and mud and sand rush out rapidly. It is difficult for workers to repair and make up for it, resulting in a construction accident. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a screw conveyor discharge gate and a discharge pressure relief method. This invention can perform secondary sealing on the outside of the discharge gate, enhancing the overall sealing effect. It can also provide pressure relief warnings when the pressure increases beyond the limit load, thus preventing safety accidents.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0007] A screw conveyor discharge gate, comprising:

[0008] The connecting sleeve has a hollow internal structure and has a first mounting side and a second mounting side that are arranged opposite to each other.

[0009] A gate sealing device is installed on the first mounting side of the connecting sleeve to control the opening and closing state of the first mounting side of the connecting sleeve.

[0010] A door sealing device is installed on the second mounting side of the connecting sleeve to control the opening and closing state of the second mounting side of the connecting sleeve. Its first end is rotatably connected to the side wall of the connecting sleeve.

[0011] An opening adjustment device is installed between the connecting sleeve and the door sealing device to control the rotation of the door sealing device and lock its rotation position.

[0012] The pressure relief control device is in communication with the hollow part of the connecting sleeve and is used to detect the pressure in the hollow part of the connecting sleeve.

[0013] The pressure relief control device monitors the pressure in the hollow part of the connecting sleeve in real time, and controls the opening adjustment device according to the pressure to adjust the opening between the door sealing device and the connecting sleeve.

[0014] Preferably, the gate sealing device includes a sealing gate, a hydraulic control element, and a gate connecting fixture. The gate connecting fixture is installed between the telescopic end of the hydraulic control element and the sealing gate, and controls the horizontal sliding of the sealing gate to control the opening and closing state of the first installation side of the connecting sleeve.

[0015] Preferably, the opening adjustment device includes an adjusting screw, the two ends of which are fixedly connected to the connecting sleeve via a limiting base. A screw sleeve is threadedly connected to the adjusting screw. The screw sleeve is connected to the first end of the door sealing device via a locking sleeve. The locking sleeve is fitted on the outside of the screw sleeve and the two slide relative to each other. A locking bolt is installed on the side wall of the limiting base, and a plurality of locking openings are opened on the side wall of the screw sleeve.

[0016] Preferably, the outer wall of the lead screw sleeve has a locking groove extending along the length direction, the inner wall of the locking sleeve is provided with a locking protrusion that matches the locking groove, the locking protrusion is slidably connected to the locking sleeve and is provided with a first elastic reset element, the inner wall of the locking groove is provided with a lifting protrusion, and the inner wall of the lead screw sleeve is hollow and is provided with a lifting assembly for controlling the lifting protrusion to lift the locking protrusion.

[0017] Preferably, the lead screw sleeve has a hollow interior forming a lifting control chamber. The lifting assembly includes a lifting control piston that slides along the inner wall of the lifting control chamber. An annular lifting sleeve is fixedly connected to the side wall of the lifting control piston. The end of the lifting sleeve is an inclined lifting annular surface. The lifting protrusion extends into the interior of the lead screw sleeve and is located on the moving path of the lifting sleeve. The pressure relief control device is connected to the lifting control chamber and is used to push the lifting control piston and the lifting sleeve to move. A second elastic reset element is provided at the end of the lifting sleeve.

[0018] Preferably, the locking grooves are a plurality of spaced-apart grooves, and the plurality of locking grooves and a locking protrusion form a locking control assembly, wherein at least two sets of locking control assemblies are provided and arranged circumferentially.

[0019] Preferably, the pressure relief control device includes a hydraulic control sleeve, a hydraulic control piston is slidably connected to the inner wall of the hydraulic control sleeve, an elastic hydraulic control element is provided between the hydraulic control piston and the inner wall of the hydraulic control sleeve, and the hydraulic control element is connected to the lifting control chamber through a hydraulic pumping pipe.

[0020] Preferably, sealing elements are provided on both sides of the locking sleeve, the sealing elements are sleeved on the outside of the lead screw sleeve and are slidably connected in a sealing manner, and an elastic reset component is provided on the outside of the sealing element.

[0021] Preferably, an airtight channel is formed between the sealing elements on both sides, the lead screw sleeve, and the locking sleeve. The hydraulic control sleeve is also equipped with an elastic pump control element. The elastic pump control element is connected to two pump pipes with one-way valves inside. The end of the first pump pipe is in a conductive state with the airtight channel.

[0022] A method for depressurizing and discharging soil using a screw conveyor includes the following steps:

[0023] S1. Based on the working state of the screw conveyor, the first installation side of the connecting sleeve is first sealed by the gate sealing device;

[0024] S2. After the first mounting side of the connecting sleeve is sealed, rotate the door sealing device to make the second mounting side of the connecting sleeve in a sealed state.

[0025] S3. After the second side of the connecting sleeve is sealed, the door sealing device is locked by the opening adjustment device. Then, the opening adjustment device is connected to the pressure relief control device. The opening adjustment device is controlled according to the pressure in the connecting sleeve to adjust the opening between the door sealing device and the connecting sleeve.

[0026] The beneficial effects of this invention are as follows:

[0027] By setting up a gate sealing device, a primary seal can be achieved to meet the soil discharge requirements of the screw conveyor. A gate sealing device on the outside of the connecting sleeve can achieve a secondary seal, which can increase the overall sealing effect and prevent mud and sand from overflowing after the gate sealing device fails. At the same time, the pressure relief control device can monitor the pressure in the connecting sleeve in real time. When the pressure in the connecting sleeve exceeds the set bearing threshold limit, the opening adjustment device can be adjusted to deflect the gate sealing device to a predetermined opening degree, thereby achieving step-by-step pressure relief to prevent overall structural failure and accidental rupture, ensuring the safe progress of construction. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the exploded structure of the present invention;

[0029] Figure 2 For the present invention Figure 1 Front view structural diagram;

[0030] Figure 3 For the present invention Figure 1 A top-view structural diagram;

[0031] Figure 4 For the present invention Figure 2 A magnified structural diagram at point A;

[0032] Figure 5 This is a three-dimensional structural diagram of the opening adjustment device of the present invention;

[0033] Figure 6 For the present invention Figure 5 Front view structural diagram;

[0034] Figure 7 For the present invention Figure 6 Schematic diagram of the BB line cross-section structure;

[0035] Figure 8 This is a schematic diagram of the application state structure of the present invention.

[0036] In the diagram: 100, mounting sleeve; 110, mounting opening; 200, gate sealing device; 210, hydraulic control element; 220, sealing gate; 230, gate connecting fixture; 300, connecting sleeve; 310, limit base; 311, limit workpiece; 400, door leaf sealing device; 410, door leaf support plate; 500, pressure relief control device; 510, hydraulic control sleeve; 520, hydraulic control piston; 5 30. Hydraulic control element; 540. Pneumatic control element; 600. Opening adjustment device; 610. Adjusting screw; 620. Screw sleeve; 621. Lifting control chamber; 622. Lifting assembly; 623. Locking groove; 624. Lifting protrusion; 630. Elastic reset assembly; 631. Compacting gasket; 632. Compacting spring; 640. Sealing element; 650. Locking sleeve; 651. Locking protrusion strip. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0038] See attached document Figure 1 -Appendix Figure 8A screw conveyor discharge gate includes a connecting sleeve 300, a gate sealing device 200, a gate sealing device 400, an opening adjustment device 600, and a pressure relief control device 500. The gate sealing device 200 and the gate sealing device 400 respectively seal both sides of the connecting sleeve 300, achieving a double sealing effect to prevent liquid leakage and overcoming the problem of poor sealing performance due to long-term wear of the gate sealing device 200. Furthermore, when the pressure inside the connecting sleeve 300 exceeds a set limit, the pressure relief control device 500 controls the locking state of the opening adjustment device 600 based on the pressure detection results. Gradual pressure relief is achieved by adjusting the opening of the gate sealing device 400, preventing large-scale damage caused by overall equipment failure and preventing structural failure after the pressure reaches a critical value. This provides an early warning effect, preventing larger safety accidents.

[0039] The connecting sleeve 300 has a hollow internal structure and has a first mounting side and a second mounting side arranged opposite to each other. The connecting sleeve 300 can be square, and several mounting and positioning countersunk holes can be opened on both sides. The gate sealing device 200 is installed on the first mounting side of the connecting sleeve 300 and is used to control the opening and closing state of the first mounting side of the connecting sleeve 300. An installation sleeve 100 is installed at the top of the gate sealing device 200, which is connected to the soil discharge end of the screw conveyor through the installation sleeve 100 to allow the discharge of the mud mixture. An installation opening 110 is opened in the middle of the installation sleeve 100, and the position of the installation opening 110 corresponds to the position of the gate sealing device 200.

[0040] The door sealing device 400 is installed on the second mounting side of the connecting sleeve 300. The door sealing device 400 is movably connected to the connecting sleeve 300 through the door support plate 410. The door sealing device 400 is used to control the opening and closing state of the second mounting side of the connecting sleeve 300. Its first end is rotatably connected to the side wall of the connecting sleeve 300. By rotating the door sealing device 400, it can fit against the second mounting side of the connecting sleeve 300 to seal the second mounting side. A sealing gasket is provided at the edge of the door sealing device 400, which can increase the sealing performance at that point after fitting. By setting the door sealing device 400 at the bottom end of the connecting sleeve 300, the sealing performance at the bottom end can be enhanced, avoiding leakage caused by poor sealing performance due to long-term impact on the gate sealing device 200.

[0041] The opening adjustment device 600 is installed between the connecting sleeve 300 and the door sealing device 400. It is used to control the rotation of the door sealing device 400 and lock its rotation position. It can rotate the door sealing device 400 to different positions and keep it in the locked state. In particular, when it rotates to a horizontal state and fits with the connecting sleeve 300, it can maintain the stability of its overall seal, bear the predetermined pressure, and ensure the stability of the overall sealing effect.

[0042] The pressure relief control device 500 is in communication with the hollow part of the connecting sleeve 300. It is used to detect the pressure in the hollow part of the connecting sleeve 300. When it detects that the pressure inside the connecting sleeve 300 is too high, it controls the locking state of the opening adjustment device 600, allowing the door sealing device 400 to deflect at a predetermined angle and be offset from the second mounting side of the connecting sleeve 300. This allows the mud and sand mixture inside the connecting sleeve 300 to be discharged from the gap between the two, thereby reducing the pressure on the connecting sleeve 300 and the door sealing device 400. It can also relieve pressure in stages, preventing the pressure inside the connecting sleeve 300 from exceeding the threshold and causing overall damage. It also prevents sudden and rapid overall pressure relief, thus avoiding accidents.

[0043] In summary, this device can detect the pressure in the hollow part of the connecting sleeve 300 in real time according to the pressure relief control device 500, and control the opening adjustment device 600 according to the pressure to adjust the opening between the door sealing device 400 and the connecting sleeve 300. When the pressure in the connecting sleeve 300 exceeds the bearing limit, the hydraulic pressure in the connecting sleeve 300 is completed, ensuring the safety of the overall structure, playing an early warning role, and preventing the sudden failure of the overall structure, thus avoiding the occurrence of safety accidents.

[0044] Please refer to the appendix for details. Figure 3 The gate sealing device 200 includes a sealing gate 220, a hydraulic control element 210, and a gate connecting fixture 230. The gate connecting fixture 230 is installed between the telescopic end of the hydraulic control element 210 and the sealing gate 220. It controls the horizontal sliding of the sealing gate 220 to control the opening and closing state of the first installation side of the connecting sleeve 300. The hydraulic control element 210 is connected to an external hydraulic control device, which can control the linear movement of the gate connecting fixture 230 to overlap with the connecting sleeve 300 to complete the sealing of the first installation side of the connecting sleeve 300. It can achieve the sealing effect on the mud and sand in the screw conveyor and can be located at different positions to form different opening degrees to control the range and rate of mud and sand discharge, so as to meet the soil discharge requirements of the screw conveyor under different conditions.

[0045] Please refer to the appendix for details. Figure 5 -Appendix Figure 7As a preferred method for adjusting the opening degree, the opening degree adjusting device 600 includes an adjusting screw 610. Both ends of the adjusting screw 610 are fixedly connected to the connecting sleeve 300 via limiting bases 310. The limiting bases 310 are detachably fixed on both sides via limiting workpieces 311. A screw sleeve 620, threadedly connected to the adjusting screw 610, is fitted over it. The screw sleeve 620 is connected to the first end of the door sealing device 400 via a locking sleeve 650. The locking sleeve 650 is fitted over the outside of the screw sleeve 620, and the two slide relative to each other. During the rotation of the door sealing device 400... The adjusting screw 610 and the screw sleeve 620 can act as a lock, which can overcome the gravity of the door sealing device 400 and keep it in any position. At the same time, the screw sleeve 620 and the adjusting screw 610 are threadedly connected. When the screw sleeve 620 rotates, it will shift to one side. The locking sleeve 650 is fitted on the outside for sliding control, which can lock the door sealing device 400. This ensures that the door sealing device 400 can rotate with the screw sleeve 620 while avoiding its left and right displacement, ensuring its accurate and stable position and guaranteeing its sealing effect.

[0046] Furthermore, a locking bolt is installed on the side wall of the limiting base 310, and several locking openings are opened on the side wall of the screw sleeve 620. The locking openings are arranged circumferentially. After the door sealing device 400 is rotated to the predetermined position, the locking bolt is rotated to insert it into the locking opening, which can complete the connection and fixation between the limiting base 310 and the door sealing device 400, ensuring the stability of its fixed position. At least two locking openings are provided so that the door sealing device 400 can be in a horizontal sealing state and a vertical open state.

[0047] In order to allow the door sealing device 400 to deflect and release pressure when the screw sleeve 620 is locked, a locking groove 623 extending along the length direction is formed on the outer wall of the screw sleeve 620. A locking protrusion 651 adapted to the locking groove 623 is provided on the inner wall of the locking sleeve 650. The locking protrusion 651 is slidably connected to the locking sleeve 650 and is provided with a first elastic reset element. The first elastic reset element allows the locking protrusion 651 to be normally in the locking groove 623. The locking groove 623 is in an extended state; and a lifting protrusion 624 is provided on the inner wall of the locking groove 623. The inner wall of the screw sleeve 620 is hollow and is provided with a lifting component 622 that controls the lifting protrusion 624 to lift the locking protrusion 651. The position of the lifting component 622 can be adjusted according to the pressure in the connecting sleeve 300. When the pressure in the connecting sleeve 300 increases, it can push the lifting component 622 to move towards the end, thereby pushing the lifting protrusion 624 to lift the locking protrusion 651. The locking protrusion 651 is disengaged from the corresponding lifting protrusion 624, thereby removing the limiting constraint on the outer locking sleeve 650. The locking sleeve 650 is fixedly connected to the door sealing device 400. At this time, the constraint of the opening adjustment device 600 on the door sealing device 400 disappears, and the door sealing device 400 deflects outward under pressure. The mud and sand mixture in the connecting sleeve 300 can be discharged from the gap, realizing automatic pressure relief in the connecting sleeve 300 and ensuring the safety of the connecting sleeve 300 and the surrounding overall structure. It should be noted that the locking groove 623 is provided with at least two sets in the circumferential direction. After the locking protrusion 651 pops out from the first lifting protrusion 624, it can continue to deflect. When it moves to the second lifting protrusion 624, the locking protrusion 651 can automatically enter the second lifting protrusion 624 under the elastic action of the first elastic reset element to complete the locking. The first elastic reset element can be selected as a spring assembly.

[0048] A lifting control chamber 621 is formed hollow inside the lead screw sleeve 620. The lifting assembly 622 includes a lifting control piston, which slides on the inner wall of the lifting control chamber 621. An annular lifting sleeve is fixedly connected to the side wall of the lifting control piston. The end of the lifting sleeve is an inclined lifting annular surface. The end of the lifting protrusion 624 penetrates into the lead screw sleeve 620 and is located on the moving path of the lifting sleeve. A pressure relief control device 500 is connected to the lifting control chamber 621 to push the lifting control piston and the lifting sleeve to move. A second elastic reset element is provided at the end of the lifting sleeve. The elastic reset element can be selected as a spring. After the pressure inside the connecting sleeve 300 increases, the pressure relief control device 500 can pump the oil inside into the lifting control chamber 621 to push the lifting control piston and the lifting sleeve to move towards the end. At this time, the inclined conical surface at the end of the lifting sleeve can interact with the moving path. The lifting protrusion 624 is abutted to lift it up, thereby controlling the displacement of the corresponding locking protrusion 651 at the top, allowing it to disengage from the locking groove 623. This eliminates the restriction on the door sealing device 400, allowing it to deflect a predetermined distance and achieve pressure relief. It should be noted that the deflection angle of the door sealing device 400 is determined based on the spacing between the two locking grooves 623. To prevent the locking protrusion 651 from failing to enter the second locking groove 623 due to excessive rotation of the door sealing device 400, a curved transition surface can be provided between the two adjacent locking grooves 623. On the one hand, the curved surface can reduce the initial impact on the locking protrusion 651; on the other hand, the smaller cross-sectional size of the curved surface can block the moving locking protrusion 651, thus completing the gripping of the rotating locking protrusion 651 and ensuring that it can achieve stable limiting a second time.

[0049] Preferably, the locking grooves 623 are arranged in a series of spaced intervals, with the intervals between the locking grooves 623 increasing sequentially. In this case, the opening of the door sealing device 400 can change intermittently, gradually opening the door sealing device 400 to achieve a step-by-step pressure relief effect. Furthermore, the series of locking grooves 623 and a locking protrusion 651 form a locking control assembly. The locking control assembly is provided in at least two sets and arranged circumferentially, preferably in two sets. The two sets of locking control assemblies are symmetrically arranged circumferentially, which can form a locking effect from both sides and can achieve force distribution. Compared with locking a single locking protrusion 651 alone, it has better stability and locking effect, and can reduce the rigidity requirements of the locking protrusion 651 material, avoiding rigidity damage to the structure during collision.

[0050] Please refer to the appendix for details. Figure 4The pressure relief control device 500 includes a hydraulic control sleeve 510, with a hydraulic control piston 520 slidably connected to the inner wall of the hydraulic control sleeve 510. An elastic hydraulic control element 530 is disposed between the hydraulic control piston 520 and the inner wall of the hydraulic control sleeve 510. The hydraulic control element 530 is connected to the lifting control chamber 621 via a hydraulic pumping pipe. When the mud inside the connecting sleeve 300 increases and the pressure rises, the increased pressure overcomes the elastic effect, pushing the hydraulic control piston 520 inward. At this time, it can squeeze the internal hydraulic control element 530, pushing its internal control oil... The hydraulic cylinder enters the lifting control chamber 621, thereby pushing the lifting assembly 622 to move towards the end, achieving the pressure relief control function. In order to ensure that the internal structure can withstand a certain pressure load, the hydraulic control element 530 can be selected as an elastic hydraulic telescopic rod, and the overall structure is stable and reliable. At the same time, an elastic return spring can be installed in the hydraulic control sleeve 510, which acts between the hydraulic control piston 520 and the hydraulic control sleeve 510. After the pressure decreases, it can push the hydraulic control piston 520 to return to the inward side, and at the same time, it can bear a certain pressure, realizing the function of pressure threshold load detection.

[0051] Sealing elements 640 are provided on both sides of the locking sleeve 650. The sealing elements 640 are sleeved on the outside of the lead screw sleeve 620 and are slidably connected in a sealing manner. An elastic reset component 630 is provided on the outside of the sealing element 640. By setting the sealing element 640, the locking sleeve 650 and the lead screw sleeve 620 can be sealed and protected from both sides, preventing external mud and sand from entering the interior and affecting the normal locking and lifting of the internal structure, thus ensuring the normal operation of the overall structure. The elastic reset component 630 can be a combination of a compaction pad 631 and a compaction spring 632. The compaction spring 632 is normally in a compressed state, which can push the inner compaction pad 631 to press against the sealing element 640, so that the sealing element 640 is located on both sides of the locking sleeve 650 and is normally in a stable and close fit, ensuring the stability of the sealing structure.

[0052] Furthermore, an airtight channel is formed between the sealing elements 640 on both sides, the lead screw sleeve 620, and the locking sleeve 650. An elastic pump control element 540 is also installed inside the hydraulic control sleeve 510. This elastic pump control element 540 connects to two pump pipes with internal one-way valves. The end of the first pump pipe is in a conductive state with the airtight channel. The pump control element 540 can pump protective gas into the airtight channel, increasing the air pressure and allowing gas to continuously escape from the gap, ensuring the airtightness of the overall structure. The pump control element 540 can be an elastic pump air bladder with a protective sleeve structure. The pump control element 540 and the hydraulic control element 530 are arranged side-by-side. When the pressure inside the connecting sleeve 300 increases beyond a threshold, both the hydraulic control element 530 and the pump control element 540 can be squeezed simultaneously. At this time, the air pumping control element 540 continuously contracts, pumping protective gas into the airtight channel to achieve the gas protection function. Simultaneously, after the pressure in the connecting sleeve 300 decreases or disappears, the overall structure can reset under the action of elasticity, allowing direct gas intake and keeping the air pumping control element 540 in a fully charged state, preparing for the next air pumping protection. Similarly, a baffle and a reset elastic element can be set on the outside of the air pumping control element 540 to lift the hydraulic control element 530, allowing the air pumping control element 540 to effectively and automatically expand and reset. Through the above settings, automatic airtight protection can be provided at the opening adjustment device 600, ensuring the normal and stable locking and deflection of the structure. At the same time, the air pumping structure can automatically pump air and automatically reset according to the pressure load, simplifying the setting of related sensing elements and making it suitable for the excavation and soil removal operations of the screw conveyor.

[0053] A method for depressurizing and discharging soil using a screw conveyor includes the following steps:

[0054] S1. According to the working state of the screw conveyor, the first installation side of the connecting sleeve 300 is first sealed by the gate sealing device 200. The gate sealing device 200 can achieve a one-time seal on the screw conveyor discharge port, preventing mud and sand from overflowing from the screw conveyor, meeting the requirements of the discharge operation, and ensuring the cleanliness of the working environment.

[0055] S2. After the first installation side of the connecting sleeve 300 is sealed, the second installation side of the connecting sleeve 300 is sealed by rotating the door sealing device 400. At this time, the connecting sleeve 300 can perform secondary sealing from the outside, which can provide secondary protection for the screw conveyor discharge port from the outside. This can solve the problem of poor sealing effect after the gate sealing device 200 fails, and ensure the normal sealing effect of the overall structure.

[0056] S3. After the second side of the connecting sleeve 300 is sealed, the door sealing device 400 is locked by the opening adjustment device 600. Then, the opening adjustment device 600 is connected to the pressure relief control device 500. The state of the opening adjustment device 600 is controlled according to the pressure in the connecting sleeve 300 to adjust the opening between the door sealing device 400 and the connecting sleeve 300. When the pressure in the connecting sleeve 300 increases beyond the threshold, the pressure sensing signal is transmitted to the opening adjustment device 600 through the connecting sleeve 300. At this time, the state of the opening adjustment device 600 changes, changing the locking state of the opening adjustment device 600 and the door sealing device 400. At this time, the door sealing device 400 can deflect outward by a predetermined distance, allowing a predetermined gap between the connecting sleeve 300 and the door sealing device 400 to allow some mud and sand to be discharged and relieve pressure. This avoids the sudden damage and failure of the overall structure due to continuous pressure increase, thus avoiding accidents. It can also remind workers to carry out timely maintenance and evacuate workers when the leakage is small.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A screw conveyor discharge gate, characterized in that, include: The connecting sleeve (300) has a hollow internal structure and has a first mounting side and a second mounting side that are arranged opposite to each other. A gate sealing device (200) is installed on the first mounting side of the connecting sleeve (300) to control the opening and closing state of the first mounting side of the connecting sleeve (300); A door sealing device (400) is installed on the second mounting side of the connecting sleeve (300) to control the opening and closing state of the second mounting side of the connecting sleeve (300), and its first end is rotatably connected to the side wall of the connecting sleeve (300). An opening adjustment device (600) is installed between the connecting sleeve (300) and the door sealing device (400) to control the rotation of the door sealing device (400) and lock its rotation position; The pressure relief control device (500) is in communication with the hollow part of the connecting sleeve (300) and is used to detect the pressure in the hollow part of the connecting sleeve (300); The pressure relief control device (500) detects the pressure in the hollow part of the connecting sleeve (300) in real time, and controls the opening adjustment device (600) according to the pressure to adjust the opening between the door sealing device (400) and the connecting sleeve (300); The opening adjustment device (600) includes an adjusting screw (610). The two ends of the adjusting screw (610) are fixedly connected to the connecting sleeve (300) through the limiting base (310). The adjusting screw (610) is fitted with a screw sleeve (620) that is threadedly connected to it. The screw sleeve (620) is connected to the first end of the door sealing device (400) through a locking sleeve (650). The locking sleeve (650) is fitted on the outside of the screw sleeve (620) and the two slide relative to each other. The side wall of the limiting base (310) is equipped with a locking bolt. The side wall of the screw sleeve (620) has several locking openings.

2. The screw conveyor discharge gate according to claim 1, characterized in that, The gate sealing device (200) includes a sealing gate (220), a hydraulic control element (210), and a gate connecting fixture (230). The gate connecting fixture (230) is installed between the telescopic end of the hydraulic control element (210) and the sealing gate (220) to control the horizontal sliding of the sealing gate (220) to control the opening and closing state of the first installation side of the connecting sleeve (300).

3. The screw conveyor discharge gate according to claim 1, characterized in that, The outer wall of the lead screw sleeve (620) has a locking groove (623) extending along the length direction. The inner wall of the locking sleeve (650) is provided with a locking protrusion (651) that matches the locking groove (623). The locking protrusion (651) is slidably connected to the locking sleeve (650) and is provided with a first elastic reset element. The inner wall of the locking groove (623) is provided with a lifting protrusion (624). The inner wall of the lead screw sleeve (620) is hollow and is provided with a lifting assembly (622) that controls the lifting protrusion (624) to lift the locking protrusion (651).

4. A screw conveyor discharge gate according to claim 3, characterized in that, The lead screw sleeve (620) has a hollow interior forming a lifting control chamber (621). The lifting assembly (622) includes a lifting control piston, which slides on the inner wall of the lifting control chamber (621). An annular lifting sleeve is fixedly connected to the side wall of the lifting control piston. The end of the lifting sleeve is an inclined lifting annular surface. The end of the lifting protrusion (624) extends into the interior of the lead screw sleeve (620) and is located on the moving path of the lifting sleeve. The pressure relief control device (500) is connected to the lifting control chamber (621) and is used to push the lifting control piston and the lifting sleeve to move. A second elastic reset element is provided at the end of the lifting sleeve.

5. A screw conveyor discharge gate according to claim 3, characterized in that, The locking grooves (623) are arranged at intervals. The locking grooves (623) and a locking protrusion (651) form a locking control assembly. The locking control assembly is provided in at least two sets and arranged circumferentially.

6. A screw conveyor discharge gate according to claim 4, characterized in that, The pressure relief control device (500) includes a hydraulic control sleeve (510), a hydraulic control piston (520) is slidably connected to the inner wall of the hydraulic control sleeve (510), and an elastic hydraulic control element (530) is provided between the hydraulic control piston (520) and the inner wall of the hydraulic control sleeve (510). The hydraulic control element (530) is connected to the lifting control chamber (621) through a hydraulic pumping pipe.

7. A screw conveyor discharge gate according to claim 6, characterized in that, The locking sleeve (650) is provided with sealing elements (640) on both sides. The sealing elements (640) are sleeved on the outside of the lead screw sleeve (620) and are in a sealed sliding connection. An elastic reset assembly (630) is provided on the outside of the sealing elements (640).

8. A screw conveyor discharge gate according to claim 7, characterized in that, An airtight channel is formed between the sealing elements (640) on both sides, the lead screw sleeve (620), and the locking sleeve (650). The hydraulic control sleeve (510) is also provided with an elastic pump control element (540). The elastic pump control element (540) is connected to two pump pipes with one-way valves inside. The end of the first pump pipe is in a conductive state with the airtight channel.

9. A method for soil discharge and pressure relief using a screw conveyor, characterized in that, Using a screw conveyor discharge gate according to any one of claims 1-8 includes the following steps: S1. According to the working state of the screw conveyor, the first mounting side of the connecting sleeve (300) is first sealed by the gate sealing device (200); S2. After the first mounting side of the connecting sleeve (300) is sealed, the second mounting side of the connecting sleeve (300) is sealed by rotating the door sealing device (400). S3. After the second side of the connecting sleeve (300) is sealed, the door sealing device (400) is locked by the opening adjustment device (600). Then, the opening adjustment device (600) is connected to the pressure relief control device (500). The opening adjustment device (600) is controlled according to the pressure in the connecting sleeve (300) to adjust the opening between the door sealing device (400) and the connecting sleeve (300).

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