WO2024067395A1

WO2024067395A1 - Method for determining switching jamming failure mode of operation rod of switch machine

Info

Publication number: WO2024067395A1
Application number: PCT/CN2023/120675
Authority: WO
Inventors: 丁召荣; 黄晨涛; 李渊; 段涵; 刘义健
Original assignee: 西安铁路信号有限责任公司; 通号（西安）轨道交通工业集团有限公司
Priority date: 2022-09-29
Filing date: 2023-09-22
Publication date: 2024-04-04
Also published as: CN115635988A

Abstract

A method for determining a switching jamming failure mode of an operation rod of a switch machine. After a switch machine starts switching, a switching duration thereof is timed; in the switching process of the switch machine, whether movement of an operation rod is unsmooth is preliminarily determined, and an unsmoothness position is recorded in an array; after the switching of the switch machine is completed or the switching duration exceeds a limit value, whether the switching process is unsmooth or whether the switching cannot be completed due to jamming is determined according to the switching duration of the switch machine; when an unsmoothness occurs in the switch machine, data in the array is recorded according to the unsmoothness position, and a specific position where the unsmoothness occurs is determined; when jamming occurs in the switch machine, the switching jamming failure mode of the operation rod of the switch machine is determined according to a final stop position of the operation rod of switch machine or a switching stroke, so as to allow maintenance personnel to intervene in maintenance in a timely manner, prevent the occurrence of a jamming failure, and accelerate the positioning and handling of a jamming failure, thereby improving the reliability of the switch machine, and reducing various influences and losses caused by the switching jamming of the operation rod of the switch machine.

Description

A method for judging the fault mode of switching machine action rod jamming

Technical Field

The present invention belongs to a turnout switching equipment auxiliary system in the field of rail transit, and relates to a method for judging a switch machine actuating rod switching jam fault mode. According to the parameters and status of the switch machine actuating rod, the cause of the switch machine switching jam is judged, and maintenance personnel are guided to handle it.

Background technique

The switch machine is used to switch and lock the turnout. When the switch machine's operating rod is stuck, its function of switching the turnout fails. In addition, statistical data show that due to various reasons, the failure of the switch machine's operating rod to switch is blocked and the turnout cannot be switched accounts for a high proportion of turnout failures.

When the switch operating rod is stuck and cannot switch the turnout, the train will not be able to pass the turnout as planned, thus delaying the operation. Usually, maintenance personnel are required to handle it urgently to minimize delays, reduce economic losses, and reduce social impact. However, since the switch is a remote-controlled device, when it gets stuck, the location of the jam is unknown, the cause of the jam is unknown, and it is not even known whether it is a jam (the fault manifestation is only the lack of positioning indication or the lack of reverse position indication) or other faults that cause the lack of positioning indication or reverse position indication. Therefore, when handling the fault, it is necessary to check each item one by one, which may make the fault handling take a long time. If it can be determined that the switch operating rod is stuck when the fault occurs, and the location of the jam can be clearly identified, and then a preliminary fault cause and solution are determined based on the fault mode, the fault handling will save time and effort.

The specific meanings of the characters and symbols described below can be found in the "Specific Implementation Method" section. Description of characters and symbols.

When the switch machine operating rod is extending or pulling in,

When ΔS≤δ, the switch machine is in the process of internal unlocking;

_When δ＜ΔS≤L, the switch machine is in the process of unlocking the driving external lock;

When L _solution < ΔS ≤ LL _lock , the switch machine is in the process of driving external locking and the movable part of the turnout is being converted;

When LL _lock < ΔS ≤ L-δ, the switch machine is in the process of driving the external lock for locking;

When L-δ＜ΔS, the switch machine is in the locking process.

If the turnout is an internal locking system, there is no external locking unlocking and locking process, whether in the process of extending the operating rod of the switch machine or in the process of pulling the operating rod in,

When ΔS≤δ, the switch machine is in the process of internal unlocking;

When δ＜ΔS≤L-δ, the switch machine is in the process of driving the movable part of the turnout for conversion;

When L-δ＜ΔS, the switch machine is in the locking process.

It can be seen that by accurately measuring the displacement of the switch machine's operating rod, combined with the specific structural parameters of the switch machine and the characteristic parameters of the turnout, the state of the switch machine can be judged according to the current stroke of the operating rod, and then according to the state of the switch machine when the operating rod is stuck or blocked, combined with other information, the cause of the blocking of the operating rod can be analyzed and judged.

More specific reasons for the action rod conversion blocking or jamming need to be refined on the basis of the above. For example, the specific reasons why the conversion locking mechanism in the switch machine cannot be unlocked can be subdivided into serious wear or damage of the conversion locking mechanism, loss of power of the motor, etc., which require more detailed analysis. Only with detailed information can the specific cause of the fault be determined.

Once the working status of the switch machine's operating rod when it is stuck or jammed is clear, or the fault mode is clear, the fault location can be determined and the repair and maintenance area can be circled. Combined with other information, the cause of the fault can be analyzed as soon as possible and the solution can be determined, which is conducive to maintenance personnel to quickly troubleshoot the fault and shorten the fault handling time.

Summary of the invention

The purpose of the present invention is to provide a method for judging the fault mode of the switch machine action rod conversion jam, so as to identify the abnormal state of the switch machine action rod conversion jam or jam, and then determine the location and cause of the switch machine action rod conversion jam or jam, guide maintenance personnel to reach the fault location as soon as possible, accurately handle the fault, and improve the fault handling efficiency.

The technical solution of the present invention is to provide a method for judging the fault mode of the switching jam of the actuating rod of a switch machine, which is characterized by: selecting the motor of the switch machine, the active parts of the switching locking mechanism, and the actuating rod of the switch machine, which are respectively recorded as the motor, the active parts, and the actuating rod, monitoring the current I or the rotation speed n of the motor, the speed (rotation speed) V of the active parts, and the displacement S of the actuating rod, and using a timer to count from the start of the switching of the switch machine, recording the switching time t of the switch machine, using the current I or the rotation speed n of the motor and the speed (rotation speed) V of the active parts to judge whether the switch machine is in the state of the switching jam of the actuating rod, when the switch machine is in the state of the switching jam of the actuating rod, using the displacement S of the actuating rod to judge the fault mode of the actuating rod jam, and outputting alarm information and maintenance guidance information, and the switching time t of the switch machine is used to judge whether the actuating rod jam or the switching jam occurs during the switching process of the switch machine.

The specific method for judging the fault mode of the switch machine action rod conversion jam is as follows:

Follow the steps below to record the status of the switch machine action rod conversion jam and resistance parameters. The main program for fault mode judgment:

Step 1: Read in I _threshold , n _threshold , t _{threshold 1} , t _{threshold 2} , V _threshold , and displacement change value C;

Step 2: Clear the timer and array D;

Step 3: Read in S, I, n, S _initial = S;

Step 4: When I>I _threshold or n>n _threshold , it is determined that the switch machine starts to switch, and the timer starts timing, j=1, D _j =0, otherwise return to step 3;

Step 5: Read in S, V, I, n;

Step 6: ΔS = ABS (SS _initial );

Step 7: When _{V≤Vthreshold} and ΔS-D _j ≥C, (C is the distinction value of displacement change, and no distinction is made when it is less than C. For example, when C is 0.5 mm, no processing is performed if the change does not exceed 0.5. This value can be modified when the distinction value needs to be adjusted), j＝j+1, D _j ＝ΔS, otherwise proceed to the next step;

Step 8: When _{I≤Ithreshold} and _{n≤nthreshold} , or the timer value _{t≥tthreshold2} , the timer stops timing, k＝j, otherwise, return to step 5;

Step 9: If _{t≤tthreshold1} , the conversion is normal; if _tthreshold1 ＜t＜ _tthreshold2 , the conversion is stuck, and the stuck position judgment subroutine is executed; otherwise, the conversion is blocked, and the blocked position judgment subroutine is executed;

Step 10: ΔS=0, k=0, return to step 2.

The stutter position determination subroutine is performed according to the following steps:

Step 1: Read in the stroke parameter L of the action rod and the motion judgment constant δ;

Step 2: Check all D _j with 2≤j≤k, determine the cause and location of the jam, and classify and count them. After checking all D _j with 2≤j≤k, end the program;

If the switch machine is equipped with an external locking turnout, read in the external locking parameters L _solution and L _lock .

When D _j ≤δ, the switch machine had a jam during the unlocking process;

When δ＜D _j ≤L _solution , a jam occurred during the unlocking process of the switch machine driving external lock;

When L _solution < D _j ≤ LL _lock , the switch machine drove the turnout switching process and jammed;

When LL _lock ＜D _j ≤L-δ, the switch machine drives the external lock to lock and jams;

When L-δ＜D _j , the switch machine was stuck during the internal locking process;

If the switch machine is equipped with an internal locking turnout,

When D _j ≤δ, the switch machine had a jam during the unlocking process;

When δ＜D _j ≤L-δ, a jam occurred during the process of the switch machine driving the movable part of the turnout to switch (movement of the action rod);

When L-δ＜D _j , the switch machine got stuck during the internal locking process.

The blocking position determination subroutine is performed according to the following steps:

Step 2: Check the ΔS value to determine the cause and location of the jam;

If the switch machine is equipped with an external locking turnout, read in the external locking parameters L _solution and L _lock ;

When ΔS≤δ, the switch machine is blocked during the unlocking process inside the machine, and the program ends;

Otherwise, when δ＜ _ΔS≤L , the switch machine drives the external lock to unlock and the program ends;

When L _solution < ΔS ≤ LL _lock , the switch machine drives the turnout during the conversion process and the program ends;

When LL _lock < ΔS ≤ L-δ, the switch machine drives the external lock to lock. If stuck, the program ends;

When L-δ＜ΔS, the switch machine is blocked during the internal locking process, and the program ends;

If the switch machine is equipped with an internal locking turnout,

Otherwise, when δ＜ΔS≤L-δ, the switch machine drives the movable part of the turnout to switch (movement of the action rod) and a jam occurs, and the program ends.

When L-δ＜ΔS, the switch machine gets stuck during the internal locking process, and the program ends.

The advantages of the present invention are that after the switch machine starts to switch, the switching time is timed. During the switching process of the switch machine, it is preliminarily determined whether its action rod is stuck, and the stuck position is recorded in an array. After the switch machine is completed or the switching time exceeds the limit value, it is determined whether the switching process is stuck or whether it is blocked and cannot be completed according to the switching time. When the switch machine is stuck, the specific location where the jam occurs is determined according to the data in the stuck position recording array. When the switch machine is stuck, the switch machine action rod conversion jam failure mode is determined according to the final stop position of the switch machine action rod or the stroke of the switching process. Finally, it helps maintenance personnel to intervene in maintenance in time, prevent the occurrence of jam failures, speed up the location and disposal of jam failures, thereby improving the reliability of the switch machine and reducing various effects and losses caused by the conversion jam of the switch machine action rod.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a main flow chart of the detection method of the present invention;

FIG2 is a flow chart of a subroutine for determining a stuck position;

FIG. 3 is a flow chart of a blocking position determination subroutine.

Detailed ways

In order to further explain the technical means and methods adopted by the present invention to achieve the predetermined purpose, the specific implementation methods, structural features and methods of the present invention are described in detail below in conjunction with the accompanying drawings and embodiments.

In the present invention, the following characters and symbols have fixed meanings in the specification and are explained as follows:

L: indicates that the limit position where the action rod starts to move is the starting point of the stroke, and the other limit position where the action rod stops moving is the end point of the stroke. The stroke of the action rod in a complete switching process of the switch machine, assuming that the extension and retraction strokes of the action rod are equal, is L;

L _solution : It means that the movement of the actuating rod from the extreme position is the starting point of the stroke, and the end point of the stroke is when the external lock is unlocked and the close-fitting rail starts to move away from it. The stroke of the actuating rod in this process is

L _lock : It means the position of the actuating rod when entering the locking state from the external locking state is the starting point of the stroke, and the position of the actuating rod when it moves to the limit position and stops is the end point of the stroke. The stroke of the actuating rod during this process.

S: indicates the current displacement value of the action rod;

S _initial : indicates the displacement value corresponding to the extreme position when the action rod starts to move;

ABS(): means taking the absolute value of the value in brackets;

ΔS: It means that the current position of the action rod is the end point of the stroke, and the limit position when the action rod starts to move is the starting point of the stroke. The stroke of the action rod during this process is recorded as the current stroke of the action rod, and its value is expressed as ΔS=ABS(SS _initial );

δ: represents the selected constant used to replace zero, its value is very small, but should be greater than the detection coefficient The jitter value is set to reduce misjudgment;

n: indicates the detected speed value of the motor in the switch machine or the detected speed value of other parts which is linearly related to its speed;

I: indicates the current detection value of the motor in the switch machine;

V: indicates the speed or rotation speed detection value of the active parts in the switch machine locking mechanism;

t: indicates that the timer is used to count from the start of the switch machine switching to the current recorded switch machine switching time;

I _threshold : represents the current threshold for judging the working state of the motor. When I>I _threshold , the motor is determined to be powered on and the switch machine starts to switch;

_nthreshold : represents the speed threshold for judging the working state of the switch machine. When n＞ _nthreshold , it is determined that the switch machine starts to switch;

_tthreshold1 : represents the time limit threshold for judging whether the switch machine has completed the conversion normally. When the timer stops timing and _{t≤tthreshold1} , the switch machine conversion process is normal and no obvious action rod jam occurs;

_tthreshold2 : indicates the maximum time limit allowed for the switch machine conversion process. After the timer stops timing, if _{t≥tthreshold2} , the switch machine has not completed the conversion within the maximum time limit;

V _threshold : indicates the speed threshold of the action rod for judging the switching jam of the switch machine, which is preset based on experience and data, or calculated based on the detected speed n;

C: represents the difference value of the action rod displacement change, which is a preset constant. Its purpose is to prevent the action rod stuck position record array from being too large. The action rod stuck position is recorded only after the action rod displacement is greater than C relative to the previous stuck position.

D: represents the action rod stroke record array when the jam occurs. The first element of the array is zero. That is, D ₁ = 0, starting from the second element, the stroke of the action rod when a jam occurs during the action rod conversion process is recorded in sequence, and the absolute value of the difference between two adjacent elements is greater than C;

D _j : represents the j-th element of array D;

K: represents the number of elements in array D.

Example 1

The ZD9/ZDJ9 switch machine with internal locking turnout is taken as the implementation object. According to the structural parameters and characteristics of the ZD9/ZDJ9 switch machine, the push plate sleeve is the active part of the conversion locking mechanism. Since the push plate sleeve and the action plate are fixed as one, the displacement of the action plate is monitored and the speed is calculated, which is recorded as the active part speed V. The speed ratio of the gear shaft and the motor shaft is fixed, and the gear shaft speed is monitored. The motor speed is calculated based on this, or the motor working current is monitored, which are recorded as the motor speed n and the motor working current I respectively. The displacement of the action rod is monitored and recorded as the action rod displacement S.

The characters and symbols with fixed meanings are used for description. As shown in FIG1 , the following steps are specifically followed to judge the switching blocking state and fault mode of the switch action rod:

Step 2: Clear the timer and array D;

Step 3: Read in S, I, n, _Sinitial = S, where _Sinitial is the initial displacement value of the action rod when the switch machine starts switching;

Step 5: Read in S, V, I, n;

Step 6: ΔS = ABS (SS _initial );

Step 7: When _{V≤Vthreshold} and ΔS-D _j ≥C, (C is the difference value of displacement change, When it is less than C, no distinction is made. For example, when C is 0.5 mm, no processing is performed if the change does not exceed 0.5. If the distinction value needs to be adjusted, this value can be modified), j = j + 1, D _j = ΔS, otherwise proceed to the next step;

Step 10: ΔS=0, k=0, return to step 2.

As shown in FIG2 , the stuttering position determination subroutine is performed according to the following steps:

Step 2: j = 1;

Step 3: j=j+1;

Step 4: If j>k, end the program;

Step 5: If D _j ≤δ, output "the switch machine has been stuck during the unlocking process"; otherwise, if δ＜D _j ≤L-δ, output "the switch machine has been stuck during the conversion (movement of the action rod) of the movable part of the turnout"; otherwise, output "the switch machine has been stuck during the locking process";

Step 6: Return to step 3;

As shown in FIG3 , the blocking position determination subroutine is performed according to the following steps:

Step 2: If ΔS≤δ, output "The switch machine is stuck during the unlocking process. Stop", end the program;

Step 3: If δ＜D _j ≤L-δ, output "the switch machine drives the movable part of the turnout to switch (movement of the action rod) and a jam occurs during the process", and end the program;

Step 4: Output "The switch machine is stuck during the internal locking process" and end the program.

Example 2

The ZD9/ZDJ9 switch machine with external locking turnout is used as the implementation object. After the internal lock of the switch machine is unlocked, the actuating rod starts to move. At this time, the stroke of the actuating rod is zero. From the start of the movement of the actuating rod to the completion of the external lock and unlocking, the close contact rail begins to move toward the repulsion process. The stroke of the actuating rod is L _release . From the start of the external lock to the locking process to the movement of the actuating rod to the stop, the stroke of the actuating rod is L _lock . The rest is the same as Example 1 and will not be described in detail.

The specific steps of converting the blocking state of the switch machine operating rod and judging the fault mode are the same as those in Example 1 and will not be described in detail.

The jam position determination subroutine is performed as follows:

Step 2: Read in external locking parameters L _solution and L _lock ;

Step 3: j = 1;

Step 4: j=j+1;

Step 5: If j>k, end the program;

Step 6: If D _j ≤δ, output “the switch machine was stuck during the unlocking process inside the machine”; otherwise, if δ＜D _j ≤L _solution , output “the switch machine drove the turnout to be stuck during the unlocking process”; otherwise, if L _solution ＜D _j ≤LL _lock , output “the switch machine drove the turnout to be stuck during the unlocking process”. A jam occurred during the conversion process”; otherwise, if LL _lock <D _j ≤L-δ, output “A jam occurred during the locking process of the switch machine driving the external lock”; otherwise, output “A jam occurred during the locking process of the switch machine driving the internal lock”;

Step 7: Return to step 4.

Step 2: Read in external locking parameters L _solution and L _lock ;

Step 3: If ΔS≤δ, output "the switch machine is stuck during the unlocking process inside the machine" and end the program;

Step 4: If δ＜ΔS≤L _, output "stuck during the unlocking process of the external lock of the switch machine drive", and end the program;

Step 5: If L _solution < ΔS ≤ LL _lock , output "After the external lock is unlocked, the switch machine drives the turnout during the conversion process and jams", and end the program;

Step 6: If LL _lock < ΔS ≤ L-δ, output "the switch machine drives the external lock to be blocked during the locking process" and end the program;

Step 7: Output "The switch machine is stuck during the internal locking process" and end the program.

Example 3

The ZD6 switch machine with internal locking turnout is used as the implementation object. According to the structural parameters and characteristics of the ZD6 switch machine, the locking gear is the active part of the conversion locking mechanism. Since the locking gear and the main shaft are fixed as one, the main shaft rotation angle is monitored and its speed is calculated, which is recorded as the active part speed V. The motor shaft speed is directly monitored or the speed is calculated after monitoring its rotation angle, or the motor shaft speed is monitored. The working current of the motor is recorded as the motor speed n and the motor working current I respectively, and the displacement of the action rod is monitored and recorded as the action rod displacement S (the initial displacement is zero).

The specific steps of the jamming position determination subroutine are the same as those in Example 1 and will not be described in detail.

The specific steps of the blocking position determination subroutine are the same as those in Example 1 and will not be described in detail.

The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

A method for judging a switching jam failure mode of an actuating rod of a switch machine is characterized by comprising the following processes and steps: for the determined structural parameters and characteristics of the switch machine, selecting I threshold , n threshold , t threshold 1 , t threshold 2 , V threshold , and displacement change amount distinction value C related to the structural parameters and characteristics of the switch machine, and judging the switching jam failure mode of the actuating rod according to the following steps:

Step 1: Read in I threshold , n threshold , t threshold 1 , t threshold 2 , V threshold , and displacement change value C;

Step 2: Clear the timer and array D;

Step 3: Read in S, I, n, Sinitial = S, where Sinitial is the initial displacement value of the action rod when the switch machine starts switching;

Step 4: When I>I threshold or n>n threshold , it is determined that the switch machine starts to switch, and the timer starts timing, j=1, D j =0, otherwise return to step 3;

Step 5: Read in S, V, I, n;

Step 6: ΔS = ABS (SS initial );

Step 7: When V≤Vthreshold , and ΔS-D j ≥C, (C is the distinction value of the displacement change, for example, when C is 0.5 mm, no processing is performed if the change does not exceed 0.5 mm. This value can be modified when the distinction value needs to be adjusted), j＝j+1, D j ＝ΔS, otherwise proceed to the next step;

Step 8: When I≤Ithreshold and n≤nthreshold , or the timer value t≥tthreshold2 , the timer stops timing, otherwise, return to step 5;

Step 9: If t≤tthreshold1 , the conversion is normal; if tthreshold1 ＜t＜ tthreshold2 , the conversion is stuck, and the stuck position judgment subroutine is executed; otherwise, the conversion is blocked, and the blocked position judgment subroutine is executed;

Step 10: ΔS=0, k=0, return to step 2.
According to a method for judging a switch machine operating rod conversion jam fault mode as described in claim 1, it is characterized by: selecting a switch machine motor or other parts proportional to the motor speed, an active part of a conversion locking mechanism and an operating rod of the switch machine, monitoring the motor current I or speed n or the speed of other parts proportional to the motor speed, the speed (speed) V of the active part, and the displacement S of the operating rod, using the motor current I or speed n and the speed (speed) V of the active part to judge whether the switch machine is in an operating rod conversion jam state, when the switch machine is in an operating rod conversion jam state, using the absolute value ΔS of the initial difference between the operating rod displacement S and the initial displacement S to judge the jam position, and record the information.
According to the method for judging the fault mode of the switching of the operating rod of the switch machine according to claim 1, it is characterized in that: the I threshold , n threshold , t threshold 1 , t threshold 2 , V threshold , and C are respectively: the current threshold I threshold for judging the working state of the motor, when I>I threshold , it is judged that the motor is powered on and the switch machine starts to switch; the speed threshold n threshold for judging the working state of the switch machine, when n>n threshold , it is judged that the switch machine starts to switch; the time limit threshold t threshold 1 for judging the normal completion of the switch machine conversion, the maximum time limit t threshold 2 for the switch machine conversion process , when the timer stops timing, when t≤tthreshold1 , the switch machine conversion process is normal, and no obvious action rod jam occurs; if t≥tthreshold2 , the switch machine has not completed the conversion within the maximum time limit; the action rod speed threshold Vthreshold for judging the switch machine conversion jam, Vthreshold is pre-set based on experience and data, or calculated based on the detected speed n; the action rod displacement change distinction value C is a pre-set constant, the purpose of which is to prevent the action rod jam position record array from being too large, and the action rod jam position is recorded only after the action rod displacement is greater than C relative to the previous jam position.
A switch machine operating rod conversion jam failure mode according to claim 1 The judgment method is characterized in that: the said jamming position judgment subroutine is executed according to the following steps:

Step 1: Read in the stroke parameter L of the action rod and the motion judgment constant δ;

Step 2: Check all D j with 2≤j≤k, determine the cause and location of the jam, and classify and count them. After checking all D j with 2≤j≤k, end the program;

If the switch machine is equipped with an external locking turnout, read in the unlocking stroke Lun and locking stroke Llock related to the external locking device parameters.

When D j ≤δ, the switch machine had a jam during the unlocking process;

When δ＜D j ≤L solution , a jam occurred during the unlocking process of the switch machine driving external lock;

When L solution < D j ≤ LL lock , the switch machine drove the turnout switching process and jammed;

When LL lock ＜D j ≤L-δ, the switch machine drives the external lock to lock and jams;

When L-δ＜D j , the switch machine was stuck during the internal locking process;

If the switch machine is equipped with an internal locking turnout,

When D j ≤δ, the switch machine had a jam during the unlocking process;

When δ＜D j ≤L-δ, a jam occurred during the process of the switch machine driving the movable part of the turnout to switch (movement of the action rod);

When L-δ＜D j , jamming occurred during the internal locking process of the switch machine.
The method for determining the jamming fault mode of the switch machine operating rod conversion according to claim 1 is characterized in that: the jamming position determination subroutine is executed according to the following steps:

Step 1: Read in the stroke parameter L of the action rod and the motion judgment constant δ;

Step 2: Check the ΔS value according to the corresponding method based on whether the switch machine is equipped with an external locking turnout or an internal locking turnout to determine the cause and location of the jam;

If the switch machine is equipped with an external locking turnout, read in the unlocking stroke Lun and locking stroke Llock related to the external locking device parameters;

When ΔS≤δ, the switch machine is blocked during the unlocking process inside the machine, and the program ends;

Otherwise, when δ＜ ΔS≤L , the switch machine drives the external lock to unlock and the program ends;

When L solution < ΔS ≤ LL lock , the switch machine drives the turnout during the conversion process and the program ends;

When LL lock < ΔS ≤ L-δ, the switch machine drives the external lock to lock and a jam occurs during the locking process, and the program ends;

When L-δ＜ΔS, the switch machine is blocked during the internal locking process, and the program ends;

If the switch machine is equipped with an internal locking turnout,

When ΔS≤δ, the switch machine is blocked during the unlocking process inside the machine, and the program ends;

Otherwise, when δ＜ΔS≤L-δ, the switch machine drives the movable part of the turnout to switch (movement of the action rod), and the program ends;

Otherwise, when L-δ＜ΔS, the switch machine gets stuck during the internal locking process, and the program ends.
According to the method for judging the switching jamming fault mode of the operating rod of a switch machine as claimed in claim 4 and claim 5, it is characterized in that: the stroke parameter L of the operating rod is the limit position where the operating rod starts to move as the stroke starting point, and the other limit position where the operating rod stops moving as the stroke starting point. The position is the end point of the stroke, which is the movement distance of the operating rod during a complete conversion process of the switch machine; the movement judgment constant δ is a selected constant used to replace zero, and its value is very small, but it should be greater than the jitter value of the detection system to reduce misjudgment; the unlocking stroke L solution is the movement of the operating rod from the extreme position as the starting point of the stroke to the end point of the stroke when the external locking is completed and the close-fitting rail begins to move toward the repulsion; the locking stroke L lock is the position of the operating rod when the external locking starts to enter the locking as the starting point of the stroke to the end point of the stroke when the operating rod moves to the extreme position and stops. The movement distance of the operating rod in this process.