A self-damage prevention system and control method for an insulating telescopic arm of a wire pole integrated operation vehicle

Abstract

The invention discloses an anti-self-damage system and control method for an insulated telescopic arm of a wire pole integrated operation vehicle, the system comprising a pitch detection mechanism and a conversion detection mechanism; the pitch detection mechanism comprising a pitch detection motor valve arranged on a pitch mechanism fixing plate and a sleeve device arranged on a side plate of the pitch mechanism for controlling whether the pitch detection motor valve is in a reversing position; the conversion detection mechanism comprising a conversion detection motor valve and a pin shaft device for controlling whether the conversion detection motor valve is in a reversing position; the inlet and outlet of a three-section arm telescopic cylinder are respectively connected to two working oil ports of a three-section arm telescopic control valve; the inlet and outlet of the conversion detection motor valve are respectively connected to a rodless chamber of the three-section arm telescopic cylinder and an inlet of the pitch detection motor valve, and the outlet of the pitch detection motor valve is connected to an oil tank; the inlet and outlet of a wire pole clamp pitch cylinder are respectively connected to two working oil ports of the wire pole clamp pitch control valve; the system enables the wire pole integrated operation vehicle to make different choices according to its multifunctional operation conditions.

Description

Technical Field

[0001] The invention relates to the field of arm control devices of a wire pole integrated operation vehicle, and in particular to an anti-self-damage system and a control method for an insulating telescopic arm of a wire pole integrated operation vehicle. Background Art

[0002] The pole-based integrated operation vehicle is a multifunctional electric power infrastructure construction equipment with multiple functions such as lifting, drilling, supporting poles, lifting poles, burying poles, auxiliary pole pulling and optional live high-altitude operation. It is suitable for the construction and installation of wooden poles, cement poles and other pole laying construction, live high-altitude maintenance and repair. The pole-based integrated operation vehicle has not yet been widely used. The boom usually adopts a three-section telescopic arm structure, in which the innermost section, namely the three-section arm, is an insulating arm, and the outermost basic arm, namely the one-section arm and the middle two-section arm, are both metal arms. When the pole integrated operation vehicle is used as an aerial operation vehicle, especially when the operator is placed on the platform to perform live aerial operations, in order to ensure the insulation performance of the vehicle and protect the safety of the platform operators, when it is necessary to operate the telescopic arm to extend, it is first necessary to ensure that the three-section insulating arm is fully extended before the two-section metal arm can be extended; when the telescopic arm is retracted, it is necessary to ensure that the two-section metal arm is retracted first, and when the two-section metal arm is fully retracted into place, the three-section insulating arm can be retracted, that is, the three-section arm must be extended first and then retracted, and the two-section arm must be extended later and then retracted first; therefore, the insulation performance of the insulating telescopic arm is particularly important.

[0003] When the utility pole integrated operation vehicle performs operations such as drilling, burying poles, and pulling poles, the auger mechanism is fixed on the two-section arm, and the supporting rod mechanism used for utility pole operations can be fixed on the two-section metal arm or the three-section insulating arm, depending on actual needs. The supporting rod mechanism mainly includes the utility pole clamp pitching mechanism and the utility pole clamp fastening mechanism. When the arm support mechanism of the telescopic boom head is fixed on the head of the two-section telescopic boom according to construction needs, the pole clamp pitching and opening and closing of the arm support mechanism can be operated to carry out operations such as hanging poles, holding poles, and burying poles. However, when the pole clamp is operated to pitch downward and the arm support mechanism is in a tilted downward position, the extension of the three-section insulating arm is not allowed, otherwise the arm support mechanism will interfere with the three-section insulating arm, which will directly damage the three-section insulating arm. Only the extension of the two-section arm and the amplitude change of the one-section arm are allowed to carry out operations such as drilling, hanging poles, holding poles, and burying poles. Only when the pole clamp pitching cylinder of the arm support mechanism is in a fully retracted state, that is, its upper plane is parallel to the upper plane of the arm, can the extension of the three-section insulating arm be operated. In addition, when the arm support mechanism is fixed to the head of the three-section insulating telescopic boom as needed, the extension of the three-section arm is not restricted. At present, the three-section arm of the pole integrated operation vehicle adopts an insulating arm. It is impossible to arrange cables, detection switches and other electronic control components in the insulating arm. It is impossible to achieve self-damage protection for the three-section insulating arm through electronic control. The product has a huge hidden danger of damage to the insulating arm and affecting the safety performance of the product. Summary of the invention

[0004] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide an anti-self-damage system and control method for the insulated telescopic arm of a pole-based integrated operating vehicle. No electrical control components such as cables and detection switches need to be installed inside the insulated telescopic arm and at the support rod mechanism. The pole-based integrated operating vehicle can make different choices according to its multifunctional operating conditions, thereby achieving a low product failure rate, low cost, simple implementation, efficient operation, and safe and reliable control.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention provides an anti-self-damage system for an insulating telescopic arm of a wire pole integrated operation vehicle, which is arranged on a support rod mechanism at the front end of an arm frame of the wire pole integrated operation vehicle; the support rod mechanism comprises a pitch mechanism fixing plate fixed to the front end of the arm frame, the pitch mechanism fixing plate is hinged to a pitch mechanism side plate, a wire pole clamp is arranged at the upper end of the pitch mechanism side plate, the movement of the three-section telescopic arm is controlled by a three-section arm telescopic cylinder arranged in the arm frame, and the rotation angle of the pitch mechanism side plate is controlled by a wire pole clamp pitch cylinder arranged at the upper end of the pitch mechanism fixing plate;

[0007] The anti-self-damage system includes a pitch detection mechanism and a conversion detection mechanism; the pitch detection mechanism includes a pitch detection motor valve fixed on a pitch mechanism fixing plate and a sleeve device provided on a side plate of the pitch mechanism for controlling whether the pitch detection motor valve is in a switching position;

[0008] The conversion detection mechanism is arranged on the pitch mechanism fixing plate, and comprises a conversion detection motor valve and a pin device for controlling whether the conversion detection motor valve is in a switching position;

[0009] The oil inlet and outlet of the three-section arm telescopic cylinder are connected to the telescopic balance valve and then connected to the two working oil ports of the three-section arm telescopic control valve respectively arranged in the valve group; the inlet of the conversion detection motor valve is connected to the rodless chamber of the three-section arm telescopic cylinder through the telescopic balance valve, the outlet of the conversion detection motor valve is connected to the inlet of the pitch detection motor valve, and the outlet of the pitch detection motor valve is connected to the oil tank;

[0010] The oil inlet and outlet ports of the wire rod clamp pitch cylinder are connected to the hydraulic lock and then respectively connected to the two working oil ports of the wire rod clamp pitch control valve arranged in the valve group; the P port and T port of the valve group are respectively connected to the pressure oil circuit and the oil tank.

[0011] Preferably, the sleeve device includes a bolt, which passes through a spring and a sleeve and is threadedly connected to a nut, the nut is pressed on the end face of the sleeve, and the sleeve is fixed on the side plate of the pitch mechanism; when the pitch cylinder of the wire rod clamp is in a fully retracted state, the head of the valve core push rod of the reversing mechanism of the pitch detection motor valve is pressed against the bolt end face of the sleeve device, so that the pitch detection motor valve is in the reversing position.

[0012] Preferably, the pitch detection motorized valve and the conversion detection motorized valve are both two-position normally closed motorized reversing valves, and the heads of the valve core push rods of the reversing mechanisms of the pitch detection motorized valve and the conversion detection motorized valve are both hemispherical.

[0013] Preferably, the pin device includes a pin, a wedge block, a round rod, and a pull ring. The round rod is welded to one end surface of the pin, the wedge block is welded below the center of one side of the pin close to the round rod, the pull ring is fixed on the round rod, and the pin is embedded in the pitch mechanism fixing plate and the three-section telescopic arm to fix the two.

[0014] Preferably, the conversion detection motor valve is fixed on the pitch mechanism fixing plate, and the pitch mechanism fixing plate and the three-section telescopic arm are respectively provided with matching through holes, and the through holes are arranged above the conversion detection motor valve, and the pin shaft of the pin shaft device is fixed on the through hole of the three-section telescopic arm, and the head of the valve core push rod of the reversing mechanism of the conversion detection motor valve is pressed on the wedge block of the pin shaft device, so that the conversion detection motor valve is in the reversing position.

[0015] The present invention also provides a control method for the anti-self-damage system of the insulated telescopic arm of a wire pole integrated operating vehicle. When the supporting rod mechanism is fixed on the three-section telescopic arm and the control detection mechanical valve is in the reversing position, the supporting rod mechanism on the three-section telescopic arm can be extended and retracted together with the three-section telescopic arm; at this time, the pitching action of the wire pole clamp pitch cylinder on the supporting rod mechanism and the opening and closing action of the wire pole clamp can be operated; the extension and retraction of the two-section telescopic arm, the amplitude change of the one-section arm, the hoisting winch and the drilling and excavation of the spiral drill on the wire pole operating vehicle can also be operated.

[0016] When the support rod mechanism is fixed on the two-section telescopic arm, the pin device is pulled out, and the conversion detection motor valve is automatically reset from the reversing position to the natural state, that is, the oil circuit is in a connected state. At this time, whether the three-section arm telescopic cylinder can operate the extension action depends on the state of the pitch detection motor valve behind;

[0017] When the operating wire rod clamp and the pitch cylinder are extended, the wire rod clamp and the casing device follow the side plate of the pitch mechanism to tilt downward, and the pitch detection motor valve automatically resets from the original switching disconnection to the natural closing state. At this time, the extension of the three-section telescopic arm cannot be operated, avoiding the damage of the three-section telescopic arm caused by the interference of the pitch mechanism with the misoperation of the extension of the three-section telescopic arm, thereby realizing the automatic control protection function of the three-section telescopic arm against self-damage;

[0018] When the pitch cylinder of the wire rod clamp on the support rod mechanism is fully retracted into place, the wire rod clamp remains parallel to the upper plane of the three-section telescopic arm, the support rod mechanism will not interfere with the three-section telescopic arm, and the pitch detection motor valve is in the reversing position. At this time, the extension action of the three-section telescopic arm can continue to be operated without damaging the three-section telescopic arm.

[0019] The beneficial effects of the present invention are as follows: the wire pole comprehensive operation vehicle is a special equipment that integrates multiple functions such as lifting, drilling, holding poles, pulling poles, burying poles and high-altitude operations, and realizes different control function requirements in different operating conditions. No electrical control components such as cables and detection switches are arranged in the insulating arm and the arm head holding pole mechanism. By respectively arranging components such as conversion detection motor valves, pitch detection motor valves, pin shaft devices, casing devices and related pipeline connections on the holding pole mechanism, different options for operations in different working conditions can be realized. When the working condition is that the holding pole mechanism is fixed to the arm head of the two-section telescopic arm for drilling, holding poles and other operations, an automatic protection control against self-damage of the three-section telescopic arm can be effectively realized; and when the working condition is that the holding pole mechanism is fixed to the arm head of the three-section telescopic arm for drilling, holding poles and other comprehensive operations, no action is restricted because there is no situation of damaging the insulating arm due to misoperation, thereby achieving a low product failure rate, low cost, efficient operation, simple implementation, and safe and reliable control. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of a self-damage prevention system for an insulating telescopic arm of a utility pole integrated operation vehicle provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the installation positions of the sleeve device and the pin device provided in the embodiment of the present invention;

[0023] Figure 3 A schematic structural diagram of a casing device provided in an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of the structure of a pin device provided in an embodiment of the present invention;

[0025] Figure 5 A schematic diagram of the hydraulic principle provided by an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1. Casing device; a. Casing; b. Bolt; c. Spring; d. Nut; 2. Pitch detection motor valve; 3. Conversion detection motor valve; 4. Pin device; e. Pin; f. Wedge block; g. Round rod; h. Pull ring; 6. Pole clamp pitch control valve; 7. Three-section arm telescopic control valve; 8. Pole clamp pitch cylinder; 9. Hydraulic lock; 10. Three-section arm telescopic cylinder; 11. Three-section arm balancing valve; 12. Three-section telescopic arm; 13. Two-section telescopic arm; 14. One-section arm; 15. Auger; 16. Two-section arm telescopic cylinder; 17. One-section arm amplitude cylinder; 18. Turret mechanism. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figures 1 to 2 As shown, an anti-self-damage system for the insulating telescopic arm of a wire pole integrated operation vehicle is arranged on a supporting rod mechanism at the front end of the boom of the wire pole integrated operation vehicle; the supporting rod mechanism includes a pitch mechanism fixing plate 20 fixed on the two-section telescopic arm 13 or the three-section telescopic arm 12, the pitch mechanism fixing plate 20 is hinged to the pitch mechanism side plate 21, and a wire pole clamp is arranged on the upper end of the pitch mechanism side plate 21, the movement of the three-section telescopic arm 12 is controlled by the three-section arm telescopic cylinder 10 arranged in the boom, and the rotation angle of the pitch mechanism side plate 21 is controlled by the wire pole clamp pitch cylinder 8 arranged on the upper end of the pitch mechanism fixing plate 20;

[0030] The anti-self-damage system includes a pitch detection mechanism and a conversion detection mechanism; the pitch detection mechanism includes a pitch detection motor valve 2 fixed on a pitch mechanism fixing plate 20 and a sleeve device 1 provided on a pitch mechanism side plate 21 for controlling whether the pitch detection motor valve 2 is in a switching position;

[0031] See also Figure 3 The sleeve device 1 includes a bolt b, which passes through a spring c and a sleeve a and is threadedly connected to a nut d, and the nut d is pressed on the end face of the sleeve a, and the sleeve a is fixed on the pitch mechanism side plate 21; when the wire rod clamp pitch cylinder 8 is in a fully retracted state, the head of the valve core push rod of the reversing mechanism of the pitch detection motor valve 2 is pressed on the end face of the bolt a of the sleeve device 1, so that the pitch detection motor valve 2 is in a reversing position.

[0032] The conversion detection mechanism is arranged on the pitch mechanism fixing plate 20, and comprises a conversion detection motor valve 3 and a pin device 4 for controlling whether the conversion detection motor valve 3 is in a switching position;

[0033] See also Figure 4 The pin device 4 includes a pin e, a wedge block f, a round rod g, and a pull ring h. The round rod g is welded to one end surface of the pin e, the wedge block f is welded below the center of one side of the pin e close to the round rod g, the pull ring h is fixed on the round rod g, and the pin e is embedded in the pitch mechanism fixing plate 20 and the three-section telescopic arm 12 to fix the two.

[0034] The pitch detection motorized valve 2 and the conversion detection motorized valve 3 are both two-position normally closed motorized reversing valves, and the heads of the valve core push rods of the reversing mechanisms of the pitch detection motorized valve 2 and the conversion detection motorized valve 3 are both hemispherical.

[0035] The conversion detection motor valve 3 is fixed on the pitch mechanism fixing plate 20, and the pitch mechanism fixing plate 20 and the three-section telescopic arm 12 are respectively provided with matching through holes, and the through holes are arranged above the conversion detection motor valve 3. The pin e of the pin shaft device 4 is fixed on the through hole of the three-section telescopic arm 12, and the head of the valve core push rod of the reversing mechanism of the conversion detection motor valve 3 is pressed on the wedge block f of the pin shaft device 4, so that the conversion detection motor valve 3 is in the reversing position.

[0036] See also Figure 5 The three-section arm telescopic cylinder 10 is provided with a telescopic balancing valve 11. The rodless chamber of the three-section arm telescopic cylinder 10 is simultaneously connected with the inlet of the conversion detection motor valve 3 and a working oil port of the three-section arm telescopic control valve 7 through the telescopic balancing valve 11 and the insulating hose. The rod chamber of the three-section arm telescopic cylinder 10 is connected with another working oil port of the three-section arm telescopic control valve 7 through the telescopic balancing valve 11; the inlet of the conversion detection motor valve 3 is communicated with the rodless chamber of the three-section arm telescopic cylinder 10 through the telescopic balancing valve 11, the outlet of the conversion detection motor valve 3 is connected with the inlet of the pitch detection motor valve 2, and the outlet of the pitch detection motor valve 2 is directly connected with the oil tank after passing through the insulating arm through the insulating hose.

[0037] The wire rod clamp pitch cylinder 8 is provided with a hydraulic lock 9, the rodless chamber of the wire rod clamp pitch cylinder 8 is connected with the control chamber of the hydraulic lock 9 and a working oil port of the wire rod clamp pitch control valve 6 in the valve group, and the rod chamber of the wire rod clamp pitch cylinder 8 is connected with another working oil port of the wire rod clamp pitch control valve 6 through the hydraulic lock 9; the P port of the valve group is connected to the pressure oil circuit, and the T port of the valve group is connected back to the oil tank; the valve group is arranged on the turret mechanism 18 at the bottom of the boom.

[0038] The control method of the present invention is as follows:

[0039] Working condition 1: When the supporting rod mechanism is fixed on the arm head of the three-section telescopic arm 12, the head of the valve core push rod of the reversing mechanism of the conversion detection motor valve 3 is pressed on the wedge block f of the pin shaft device 4, and the conversion detection motor valve 3 is in the reversing position, that is, its oil circuit is in a disconnected state, and the oil circuit connected to the large chamber of the oil cylinder of the three-section telescopic arm 12 is not connected to the oil tank. At this time, the telescopic action of the three-section telescopic arm 12 is not restricted, and the supporting rod mechanism fixed on the three-section telescopic arm 12 is extended and retracted together with the three-section telescopic arm 12, and the pitching action of the pole clamp pitching cylinder 8 on the supporting rod mechanism and the opening and closing action of the pole clamp can be operated; the two-section arm telescopic cylinder 16 can also be operated to realize the telescopic action of the two-section telescopic arm 13, and the one-section arm amplitude cylinder 17 can be operated to realize the amplitude change of the one-section arm 14, the hoisting winch and the drilling and excavation of the spiral drill 15, and all actions of the work vehicle are not restricted;

[0040] Working condition 2: When the supporting rod mechanism is fixed on the two-section telescopic arm 13, it is necessary to pull out the pin device 4, and the head of the valve core push rod of the reversing mechanism of the conversion detection motor valve 3 is separated from the wedge block f of the original pin device 4. The conversion detection motor valve 3 is automatically reset to the natural state from the reversing position, that is, the conversion detection motor valve 3 is in a closed state, that is, the oil circuit of the conversion detection motor valve 3 is in a connected state. Whether the three-section arm telescopic cylinder 10 can operate the extension action depends on the state of the subsequent pitch detection motor valve 2; when the wire rod clamp pitch cylinder 8 of the operating supporting rod mechanism is extended, the wire rod clamp and the casing device 1 follow the pitch The mechanism side plate 21 tilts downward, the head of the valve core push rod of the reversing mechanism of the pitch detection motor valve 2 is separated from the bolt b end face of the casing device 1, and the pitch detection motor valve 2 is automatically reset from the original reversing disconnection to the natural closing state. At this time, the rodless chamber oil circuit of the three-section arm telescopic cylinder 10 is connected with the oil return tank through the conversion detection motor valve 3, the pitch detection motor valve 2, and the hose. At this time, the extension action of the three-section telescopic arm 12 cannot be operated, avoiding the damage of the three-section telescopic arm 12 caused by the interference of the extension of the three-section telescopic arm 12 and the pitch mechanism due to the misoperation, thereby realizing the self-damage prevention automatic control protection function of the three-section telescopic arm 12;

[0041] When the wire rod clamp pitch cylinder 8 on the support rod mechanism is fully retracted into place, the wire rod clamp of the support rod mechanism remains parallel to the upper plane of the three-section telescopic arm 12, and the support rod mechanism will not interfere with the three-section telescopic arm 12. When the head of the valve core push rod of the reversing mechanism of the pitch detection motor valve 2 is automatically re-pressed on the end face of the bolt b of the casing device 1, the pitch detection motor valve 2 is automatically in the reversing position, and the oil circuit of the pitch detection motor valve 2 connected to the rodless chamber of the three-section arm telescopic cylinder 10 is in a disconnected state. At this time, the extension action of the three-section telescopic arm 12 can continue to be operated without damaging the three-section telescopic arm 12.

[0042] The wire pole comprehensive operation vehicle of the present invention is a special equipment with multiple functions such as lifting, drilling, holding poles, pulling poles, burying poles and high-altitude operations. It realizes different control function requirements in different operating conditions. No electrical control components such as cables and detection switches are arranged in the insulating arm and the arm head holding pole mechanism. By respectively arranging components such as conversion detection motor valves, pitch detection motor valves, pin shaft devices, casing devices and related pipeline connections on the holding pole mechanism, different selections for operations in different working conditions can be realized. When the working condition is that the holding pole mechanism is fixed to the arm head of the two-section telescopic arm for drilling, holding poles and other operations, an automatic protection control for preventing the three-section telescopic arm from self-damage can be effectively realized; and when the working condition is that the holding pole mechanism is fixed to the arm head of the three-section telescopic arm for drilling, holding poles and other comprehensive operations, no action is restricted because there is no situation of damaging the insulating arm due to misoperation, thereby realizing a low product failure rate, low cost, efficient operation, simple implementation, and safe and reliable control.

[0043] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An anti-self-damage system for an insulated telescopic arm of a wire pole integrated operation vehicle, comprising a support rod mechanism, the support rod mechanism comprising a pitch mechanism fixing plate (20) fixed to the front end of an arm frame, the front end of the pitch mechanism fixing plate (20) being hinged to a pitch mechanism side plate (21), a three-section arm telescopic cylinder (10) for controlling the telescopic movement of a three-section telescopic arm (12) being arranged in the arm frame, the rotation angle of the pitch mechanism side plate (21) being controlled by a wire pole clamp pitch cylinder (8) arranged at the upper end of the pitch mechanism fixing plate (20), characterized in that: The anti-self-damage system comprises a pitch detection mechanism and a conversion detection mechanism; the pitch detection mechanism comprises a pitch detection motor valve (2) fixed on a pitch mechanism fixing plate (20) and a sleeve device (1) arranged on a pitch mechanism side plate (21) for controlling whether the pitch detection motor valve (2) is in a conversion position; The conversion detection mechanism is arranged on the pitch mechanism fixing plate (20), and comprises a conversion detection motor valve (3) and a pin device (4) for controlling whether the conversion detection motor valve (3) is in a switching position; The oil inlet and outlet of the three-section boom telescopic cylinder (10) are connected to the telescopic balance valve (11) and then to the two working oil ports of the three-section boom telescopic control valve (7) respectively arranged in the valve group; the inlet of the conversion detection motor valve (3) is connected to the rodless chamber of the three-section boom telescopic cylinder (10) through the telescopic balance valve (11), the outlet of the conversion detection motor valve (3) is connected to the inlet of the pitch detection motor valve (2), and the outlet of the pitch detection motor valve (2) is connected to the oil tank; The oil inlet and outlet ports of the wire rod clamp pitch cylinder (8) are connected to the hydraulic lock (9) and then respectively connected to the two working oil ports of the wire rod clamp pitch control valve (6) arranged in the valve group; the P port and T port of the valve group are respectively connected to the pressure oil circuit and the oil tank.

2. The anti-self-damage system of the insulating telescopic arm of the utility pole integrated operation vehicle according to claim 1, characterized in that: The sleeve device (1) comprises a bolt (b), wherein the bolt (b) passes through a spring (c) and a sleeve (a) and is then threadedly connected to a nut (d), wherein the nut (d) is pressed against the end face of the sleeve (a), and the sleeve (a) is fixed on a side plate (21) of a pitch mechanism; when the wire rod clamp pitch cylinder (8) is in a fully retracted state, the head of the valve core push rod of the reversing mechanism of the pitch detection motor valve (2) is pressed against the end face of the bolt (a) of the sleeve device (1), so that the pitch detection motor valve (2) is in a reversing position.

3. The anti-self-damage system of the insulated telescopic arm of the utility pole integrated operation vehicle according to claim 2, characterized in that: The pitch detection motorized valve (2) and the conversion detection motorized valve (3) are both two-position normally closed motorized directional control valves, and the heads of the valve core push rods of the directional control mechanisms of the pitch detection motorized valve (2) and the conversion detection motorized valve (3) are both hemispherical.

4. The anti-self-damage system of the insulated telescopic arm of the utility pole integrated operation vehicle according to claim 3, characterized in that: The pin shaft device (4) comprises a pin shaft (e), a wedge-shaped block (f), a round rod (g), and a pull ring (h); the round rod (g) is welded to one end surface of the pin shaft (e); the wedge-shaped block (f) is welded below the center of one side of the pin shaft (e) close to the round rod (g); the pull ring (h) is fixed on the round rod (g); the pin shaft (e) is embedded in the pitch mechanism fixing plate (20) and the three-section telescopic arm (12) to play a role in fixing and connecting the two.

5. The anti-self-damage system of the insulated telescopic arm of the utility pole integrated operation vehicle according to claim 4, characterized in that: The conversion detection motor valve (3) is fixed on a pitch mechanism fixing plate (20), and matching through holes are respectively provided on the pitch mechanism fixing plate (20) and the three-section telescopic arm (12), and the through holes are provided above the conversion detection motor valve (3). The pin (e) of the pin shaft device (4) is fixed on the through hole of the three-section telescopic arm (12), and the head of the valve core push rod of the reversing mechanism of the conversion detection motor valve (3) is pressed on the wedge block (f) of the pin shaft device (4), so that the conversion detection motor valve (3) is in a reversing position.

6. A control method for the anti-self-damage system of the insulating telescopic arm of the wire pole integrated operation vehicle as claimed in claim 5, characterized in that: When the supporting rod mechanism is fixed on the three-section telescopic arm (12), and the control switching detection motor valve (3) is in the switching position, the supporting rod mechanism on the three-section telescopic arm (12) can be extended and retracted together with the three-section telescopic arm; at this time, the pitching action of the wire rod clamp pitching cylinder (8) on the supporting rod mechanism and the opening and closing action of the wire rod clamp can be operated; the telescopic action of the two-section telescopic arm (13) on the wire rod operation vehicle, the amplitude change of the one-section arm (14), the hoisting winch, and the drilling and excavation of the spiral drill (15) at the front end of the operation vehicle can also be operated.

7. A control method for the anti-self-damage system of the insulating telescopic arm of the utility pole integrated operation vehicle as claimed in claim 5, characterized in that: When the support rod mechanism is fixed on the two-section telescopic arm (13), the pin device (4) is pulled out, and the switching detection motor valve (3) is automatically reset from the switching position to the natural state, that is, the oil circuit is in a connected state. At this time, whether the three-section arm telescopic cylinder (10) can operate the extension action depends on the state of the subsequent pitch detection motor valve (2); When the wire rod clamp pitch cylinder (8) is extended, the wire rod clamp and the sleeve device (1) tilt downward following the pitch mechanism side plate (21), and the pitch detection motor valve (2) automatically resets from the original switching disconnection to the natural closing state, and the extension action of the three-section telescopic arm (12) cannot be operated at this time, thereby avoiding the damage of the three-section telescopic arm (12) caused by the interference of the pitch mechanism with the misoperation of the extension of the three-section telescopic arm (12), thereby realizing the self-damage prevention automatic control protection function of the three-section telescopic arm (12); When the wire rod clamp pitch cylinder (8) on the supporting rod mechanism is completely retracted into place, the wire rod clamp is kept parallel to the upper plane of the three-section telescopic arm (12), the supporting rod mechanism will not interfere with the three-section telescopic arm (12), and the pitch detection motor valve (2) is in the reversing position. At this time, the extension action of the three-section telescopic arm (12) can continue to be operated without damaging the three-section telescopic arm (12).

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