Search

CN-117246697-B - Closing method of combined gate

CN117246697BCN 117246697 BCN117246697 BCN 117246697BCN-117246697-B

Abstract

The invention relates to the technical field of underground engineering construction and discloses a closing method of a combined gate, wherein the combined gate comprises N sub-gates which are sequentially and alternately distributed along the fluid flow direction, N is more than or equal to 2, N sub-gates can be independently controlled to open and close and open, the combined gate is opened when the fluid passes through the last sub-gate after the fluid passes through the last sub-gate, and the combined gate cannot be closed when the fluid passes through the last sub-gate, and at least one sub-gate is closed before the last sub-gate when the last sub-gate starts to close, or is closed synchronously with the last sub-gate. The closing logic designed by the invention can enable the last sub-gate to be closed more easily.

Inventors

  • ZHU HUAN

Assignees

  • 宁波寰禹智能科技有限公司

Dates

Publication Date
20260505
Application Date
20230907

Claims (7)

  1. 1. A closing method of a combined gate, which is hermetically connected to a pipeline, is characterized in that the combined gate comprises N sub-gates which are sequentially and alternately distributed along the fluid flow direction, wherein N is more than or equal to 2, the N sub-gates can be independently controlled to be opened and closed and the opening degree, the combined gate is opened when the fluid passes through the last sub-gate after the fluid passes through the last sub-gate, and the combined gate is closed when the fluid cannot pass through the last sub-gate, wherein in the process of switching the combined gate from the opened state to the closed state: when the last sub-gate starts to close, at least one sub-gate in front of the last sub-gate starts to close and stops closing; in the case that at least one sub-gate in front has been closed and has stopped closing or at least one sub-gate in front is being closed, the time point when the closing of the former sub-gate is started is earlier than the time point when the closing of the latter sub-gate is started in N sub-gates which are sequentially and alternately distributed along the fluid flow direction; And under the condition that at least one sub-gate in front has been closed and the closing operation has been stopped, if the sub-gate is completely closed, the last sub-gate starts to close after the fluid in the sub-gate stops flowing, and when N is more than 2, the interval distance between the last two sub-gates is larger than the interval distance between any two adjacent sub-gates in front.
  2. 2. The method of closing a sectional type gate according to claim 1, wherein the time points at which any adjacent two sub-gate closing actions are started are equal in interval.
  3. 3. The method of closing a composite gate according to claim 1 or 2, wherein the former sub-gate is closed to a% of the maximum opening, the latter sub-gate is closed to b% of the maximum opening, wherein 1 ≡a ≡b ≡0, and the last sub-gate is completely closed.
  4. 4. A method of closing a sectional shutter according to claim 3, wherein the sub-shutter of the first N-1 passes is closed to 50% -70% of the maximum opening degree.
  5. 5. A method of closing a composite gate according to claim 3, wherein for the m-th sub-gate distributed from front to back in the fluid flow direction, n≥m≥1, it is closed to (N-m)/N of the maximum opening degree.
  6. 6. The method of closing a composite gate according to claim 1, wherein, in the case where at least one of the sub-gates in front starts to close in synchronization with the last sub-gate: and the N sub-gates start to close simultaneously.
  7. 7. The method of closing a composite gate according to claim 6, wherein the maximum closing forces of the N sub-gates are equal.

Description

Closing method of combined gate Technical Field The invention relates to the technical field of underground engineering construction, in particular to a closing method of a combined gate. Background In the field of underground engineering construction, a development machine (a shield tunneling machine and a pipe jacking machine) is widely applied as modern automatic mechanical equipment, is mainly used for underground excavation work, and is required to be matched with a screw machine to synchronously convey excavated dregs outwards. Because the underground environment that the entry driving machine worked is comparatively complicated, during the construction, the water content of screw machine slag tap is very big, and mix with the stone often, present screw machine is generally equipped with only one and opens and close the gate, the gate of screw machine has the risk of being blocked by the stone when the play soil, even under the ideal operating mode of no miscellaneous stone, the gate board receives also great from the pressure of flowing dregs, the condition that the gate can not close completely or can not close in time appears equally under great pressure, in the stratum that water content is big, can appear gushing because of the gate can not close, the gushing can cause ground to appear certain subsidence, the sediment, the water etc. that gushes out can submerge the tunnel, seriously influence the construction safety. Disclosure of Invention The invention aims to provide a closing method of a combined gate. The combined gate closing logic designed by the invention not only can make the closing force required by the complete closing of the last sub gate smaller and the gate is easier to close, but also is beneficial to reducing the design cost of the gate and prolonging the service life of the gate. The technical scheme is that the combined gate comprises N sub-gates which are sequentially distributed at intervals along the flowing direction of fluid, wherein N is more than or equal to 2, the N sub-gates can be independently controlled to be opened and closed and the opening degree is large, the combined gate is opened when the fluid passes through the last sub-gate after the fluid passes through the last sub-gate, and the combined gate is closed when the fluid cannot pass through the last sub-gate, wherein in the process of switching the combined gate from the opened state to the closed state: At least one of the sub-gates is arranged in front of the last sub-gate when the sub-gate starts to close Has performed the closing operation and has stopped the closing operation, or In the closing motion or And closing the sub gate synchronously with the last sub gate. Compared with the prior art, the combined gate comprises at least two sub-gates which can be independently controlled to open and close and the opening degree, each sub-gate forming the combined gate has respective closing logic, all the closing logic can drive the last sub-gate with smaller closing force to serve, and particularly, when the last sub-gate starts to perform closing action, the closing logic ensures that other sub-gates in front perform over-closing action or perform closing action synchronously with the last sub-gate, the closing logic under various conditions set above can be generalized to perform 'force reduction' for the implementation of the action before the last sub-gate, a certain pressure drop is generated when fluid passes through the front sub-gate (the pressure drop means that a certain heat is generated due to turbulence, turbulence and other phenomena when the fluid passes through the sub-gate, so that the pressure is reduced), namely, the front sub-gate can effectively stop the fluid, and the closing of the last sub-gate is easy to perform the closing action of the last sub-gate slightly. The easiness of closing the sub-gate is related to the selection of the gate specification, the conventional screw machine only adopts one gate as a switch, and a single gate is required to have higher closing force, but the invention adopts a mode of combining multiple sub-gates to reduce the design requirement of the maximum closing force of each sub-gate, thereby realizing the same closing effect by adopting the sub-gate with smaller specification, effectively reducing the design cost of the gate, and simultaneously prolonging the service life of the sub-gate with smaller specification. In the above-described method for closing a composite gate, when at least one of the sub-gates has been closed before and has stopped closing, or when at least one of the sub-gates is being closed before, the method includes: And in the N sub-gates which are sequentially and at intervals along the fluid flow direction, the starting time point of the closing action of the former sub-gate is earlier than the starting time point of the closing action of the latter sub-gate. In the above-described method for closing a composite gate, the time i