Groove excavation device for water conservancy and hydropower construction

Abstract

The invention discloses a trench excavation device for water conservancy and hydropower construction, and relates to the technical field of trench excavation, the trench excavation device comprises a vehicle body and a functional part mounted below the vehicle body, and the vehicle body is also provided with a hydraulic driving piece for cooperatively adjusting the lowering height of the functional part; the functional part comprises a bearing frame, the front end of the bearing frame is arranged to be a horizontal part, the rear end of the bearing frame is arranged to be an inclined part, an excavating mechanism is assembled in the horizontal part, and a discharging mechanism is assembled in the inclined part. The digging mechanism at the front end can be used for digging and rubbing the bottom of a groove, the discharging mechanism at the rear end can be used for carrying soil at the digging position upwards, and the soil can be stacked on one side of the groove through cooperation of a blanking groove, so that soil is convenient to clean while digging is facilitated, and the whole device is relatively convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of trench excavation, and more specifically, to a trench excavation device for water conservancy and hydropower construction. Background Art

[0002] The excavation of water conservancy and hydropower ditches is a complex process involving multiple steps and various equipment. The excavation of trenches is usually carried out in multiple steps to avoid disturbing the soil in the trench body and over-excavation. For example, the trench can be divided into an upper layer, a lower layer, and a protective layer, and excavated separately. The protective layer is usually excavated manually to a depth of 30 cm, while the lower layer and the upper layer are excavated mechanically.

[0003] Referring to the Chinese patent case with the publication number CN114182773A, it discloses a slope trench excavation device with an adjustable slope coefficient and an excavation method. It is applicable to the technical field related to slope trench excavation. The technical solution adopted by the present invention is: a slope trench excavation device with an adjustable slope coefficient, characterized in that: a trench forming mechanism, having a bottom plate and two side plates for trench excavation and forming, and the two side plates are respectively rotatably hinged to the left and right sides of the bottom plate; an inclination adjustment mechanism, arranged on the trench forming mechanism for adjusting the inclination angle between the side plate and the bottom plate; a soil crushing mechanism, arranged on the trench forming mechanism for crushing the soil in front of the area between the two side plates above the bottom plate to facilitate the bottom plate and the side plates to push away the soil in front to form a trench. However, in this solution, during the trench excavation process, the crushed soil will accumulate in the bottom plate. As the equipment advances and excavates, this part of the soil will be directly piled in the trench and still requires subsequent cleaning. And when approaching the trench protective layer, it is not easy to control the elevation of the protective layer when using an excavator to clean the soil, and it is time-consuming and laborious when using manual cleaning.

[0004] Therefore, in order to solve the problem of facilitating soil cleaning during the trench excavation process, we provide a trench excavation device for water conservancy and hydropower construction. Summary of the Invention

[0005] In order to solve the problems raised in the above background art, the present invention provides a trench excavation device for water conservancy and hydropower construction.

[0006] The trench excavation device for water conservancy and hydropower construction provided by the present invention adopts the following technical solutions: A trench excavation device for water conservancy and hydropower construction, comprising: a vehicle body and a functional part installed below the vehicle body, and a hydraulic drive part for cooperatively adjusting the lowering height of the functional part is also installed on the vehicle body; The functional part includes a carrier frame, the front end of the carrier frame is set as a horizontal part, the rear end is set as an inclined part, a digging mechanism is assembled in the horizontal part, and a discharging mechanism is assembled in the inclined part; Among them, a plurality of excavation units are arranged in the excavation mechanism. Each excavation unit is composed of a triangular plate, three first sprockets and an excavation chain drivingly installed thereon. The three first sprockets are respectively rotatably installed at the folding angles of the triangular plate, and shovels are evenly assembled on the outer surface of the excavation chain. The discharging mechanism includes two driving rollers, a synchronous belt is drivingly arranged on the two driving rollers, and a plurality of buckets are evenly arranged on the outer surface of the synchronous belt.

[0007] Preferably, a baffle is installed at the front end of the horizontal part of the bearing frame. There is a feeding port below the baffle. Side plates are installed at both ends of the baffle extending forward. A plurality of excavation units are evenly arranged between the two side plates. The excavation mechanism also includes three support rotating shafts. The first sprockets in the excavation units are respectively sleeved on the corresponding support rotating shafts.

[0008] Preferably, a driving motor is also installed at the top in front of the baffle. A second sprocket is also sleeved on the output shaft of the driving motor and on the support rotating shaft close to it. A driving chain is drivingly installed on the two second sprockets. Stable bearings are also installed at both ends of the topmost support rotating shaft. The outer side of the stable bearing is connected with a stable pull rod, and the top of the stable pull rod is fixedly installed on the front side of the baffle.

[0009] Preferably, a cleaning mechanism is also arranged between adjacent excavation units. The cleaning mechanism includes a fixed shaft and three cleaning gears sleeved thereon. The cleaning gear in the middle is arranged with its teeth misaligned with the teeth of the cleaning gears on both sides.

[0010] Preferably, the cleaning mechanism also includes an auxiliary gear. An output gear is also sleeved on the support rotating shaft below. The auxiliary gear meshes with the output gear. Belt pulleys are sleeved at both ends of the central axis of the auxiliary gear and at both ends of the fixed shaft. The same belt is drivingly installed on the two belt pulleys at the same position.

[0011] Preferably, a discharging motor is also installed on the side of the inclined part of the bearing frame. The output shaft of the discharging motor is connected to the central axis of the corresponding driving roller, and an inclined blanking chute is also installed below near the highest point of the inclined part of the bearing frame.

[0012] Preferably, a hoisting assembly is also arranged between the bottom of the vehicle body and the horizontal part of the bearing frame. The hoisting assembly includes a mounting frame fixedly installed at the bottom of the vehicle body. Two hoisting vertical rails are vertically installed on the side of the mounting frame. Fixed seats are installed on both sides of the horizontal part of the bearing frame. The fixed seats are in sliding contact with the hoisting vertical rails, and a set of bolts for inserting into and slidingly cooperating with the hoisting vertical rails is arranged on the side of the fixed seat.

[0013] Preferably, two retaining arms extend rearward from the rear of the vehicle body. A support assembly is provided between the retaining arms and the inclined portion of the carrier. The support assembly includes a support frame fixedly installed on the retaining arms, and an auxiliary wheel is installed on one side of the support frame and extends downward.

[0014] Preferably, a support vertical rail extending downward is installed on the other side of the support frame. Bolt groups two are installed on both side surfaces of the inclined portion of the carrier, and the bolt groups two are inserted into the support vertical rail and are in sliding fit with it.

[0015] In summary, the present invention includes the following beneficial technical effects: 1. In this application, the functional part is installed below the vehicle body, and a digging mechanism and a discharging mechanism are respectively provided at the front end and the rear end of the functional part. The digging mechanism at the front end can dig and deepen the bottom of the trench, and the discharging mechanism at the rear end can carry the soil dug out upward and, through the cooperation of the material dropping chute, can be stacked on one side of the trench, which is convenient for excavation and soil cleaning, and is overall quite convenient.

[0016] 2. In the digging mechanism of this application, a plurality of excavation units are provided. The excavation units form a triangle through three sprocket wheels one and an excavation chain, and can excavate the trench while maintaining stability. After the plurality of excavation units are arranged and work synchronously, the excavation efficiency can be greatly improved.

[0017] 3. In this application, a cleaning mechanism is also provided between adjacent excavation units. By installing a plurality of cleaning gears arranged in a staggered manner on the fixed shaft, when the cleaning gears rotate, the soil stuffed between adjacent excavation units can be scattered, and with the continuous vibration of the excavation units during continuous work, the scattered soil can be shaken off, achieving the effect of self-cleaning.

[0018] 4. In this application, a hoisting assembly and a support assembly are also provided between the vehicle body and the carrier. Through the cooperation of bolt group one and the hoisting vertical rail, and bolt group two and the support vertical rail, the carrier can be fixedly installed below the vehicle body. When it is necessary to adjust the excavation depth of the trench, bolt group one and bolt group two can be loosened first, and the carrier can be pushed up and down by the hydraulic driving member to adjust the height. After the adjustment is completed, bolt group one and bolt group two can be tightened again to continue working, and the adjustment is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the trench excavation work of the present invention; Figure 2 is a schematic diagram of the overall appearance of the present invention; Figure 3 is a schematic diagram of the vehicle body structure of the present invention; Figure 4 is a schematic diagram of the structure of the functional part of the present invention; Figure 5 It is a related schematic diagram of the excavation mechanism of the present invention; Figure 6 It is a schematic diagram of the discharging mechanism of the present invention; Figure 7 It is a schematic diagram of the structure of the carrier frame of the present invention; Figure 8 It is a schematic diagram of the excavation unit and the cleaning mechanism of the present invention; Figure 9 It is a schematic diagram of the hoisting assembly of the present invention.

[0020] Explanation of reference numerals: 1, vehicle body; 11, hydraulic driving member; 12, hoisting assembly; 1201, mounting frame; 1202, hoisting vertical rail; 1203, fixed seat; 1204, bolt group one; 13, support assembly; 1301, support frame; 1302, auxiliary wheel; 1303, support vertical rail; 1304, bolt group two; 2, functional part; 21, carrier frame; 2101, baffle; 2102, side plate; 2103, feeding port; 22, excavation mechanism; 2201, triangular plate; 2202, support rotating shaft; 2203, sprocket one; 2204, excavation chain; 2205, driving motor; 2206, sprocket two; 2207, driving chain; 2208, stable bearing; 2209, stable pull rod; 2210, output gear; 2211, auxiliary gear; 2212, fixed shaft; 2213, cleaning gear; 2214, belt pulley; 2215, belt; 23, discharging mechanism; 2301, driving roller; 2302, synchronous belt; 2303, bucket; 2304, discharging motor; 2305, blanking chute. Detailed implementation manners

[0021] The following will Figures 1 to 9 further describe the present invention in detail with reference to the appended

[0022] It should be noted that the drawings are schematic and not drawn to scale. For the sake of clarity and convenience in the figures, the relative dimensions and ratios of the parts shown in the figures are exaggerated or reduced in size for illustration, and any dimensions are only exemplary and not restrictive. In addition, the same reference numerals are used for the same structures, elements or fittings that appear in more than two figures to reflect similar features.

[0023] Embodiment 1 Referring to Figures 1 to 9 as shown, the present invention discloses a trench excavation device for water conservancy and hydropower construction, including a vehicle body 1 and a functional part 2 installed below the vehicle body 1, and a hydraulic driving member 11 for cooperatively adjusting the lowering height of the functional part 2 is also installed on the vehicle body 1; The functional part 2 includes a carrier 21. The front end of the carrier 21 is set as a horizontal part, and the rear end is set as an inclined part. A digging mechanism 22 is assembled in the horizontal part. A plurality of excavation units are arranged in the digging mechanism 22. Each excavation unit is composed of two triangular plates 2201, three first sprockets 2203 and an excavation chain 2204 drivingly installed thereon. The three first sprockets 2203 are respectively rotatably installed at the folding corners of the triangular plates 2201. The triangular plates 2201 are arranged on both sides of the excavation chain 2204. On the one hand, they can support the three first sprockets 2203, and on the other hand, they can block the gaps between the three first sprockets 2203 to prevent soil from entering. Shovels are evenly assembled on the outer surface of the excavation chain 2204. The shovels are made of metal alloy material and are made flat. In addition, a baffle 2101 is installed at the front end of the horizontal part of the carrier 21. There is a feeding port 2103 below the baffle 2101. Side plates 2102 are installed at both ends of the baffle 2101 and extend forward. A plurality of excavation units are evenly arranged between the two side plates 2102. The baffle 2101 can prevent the excavated soil from splashing, and the excavated soil can be conveyed into the interior of the carrier 21 through the opened feeding port 2103. The two side plates 2102 can, on the one hand, support the digging mechanism 22 to ensure stability, and on the other hand, can protect the digging mechanism 22 to prevent the soil on the side of the trench from falling directly on the digging mechanism 22; And in order to facilitate driving a plurality of excavation units, the digging mechanism 22 further includes three support rotating shafts 2202. The first sprockets 2203 in the excavation units are respectively sleeved on the corresponding support rotating shafts 2202. A driving motor 2205 is also installed at the top in front of the baffle 2101. A second sprocket 2206 is also sleeved on the output shaft of the driving motor 2205 and on the support rotating shaft 2202 close to it. A driving chain 2207 is drivingly installed on the two second sprockets 2206. Stable bearings 2208 are also installed at both ends of the uppermost support rotating shaft 2202. A stable pull rod 2209 is connected to the outer side surface of the stable bearing 2208. The top of the stable pull rod 2209 is fixedly installed on the front side surface of the baffle 2101. Through the cooperation of the stable bearing 2208 and the stable pull rod 2209, the stability of the support rotating shaft 2202 can be further maintained. And through the cooperation of the second sprocket 2206 and the driving chain 2207, the support rotating shaft 2202 can be driven to rotate, facilitating synchronous driving of a plurality of excavation units to work, and greatly enhancing the working efficiency of excavation.

[0024] Embodiment 2 Refer to Figure 4 、 5, as shown in FIGS. 8, on the basis of the first embodiment, in order to prevent soil from clogging between adjacent excavation units during the excavation process, a cleaning mechanism is further provided between adjacent excavation units. The cleaning mechanism includes a fixed shaft 2212 and three cleaning gears 2213 sleeved thereon. The cleaning gear 2213 in the middle is arranged with its teeth misaligned with those of the cleaning gears 2213 on both sides. The cleaning mechanism further includes an auxiliary gear 2211. An output gear 2210 is also sleeved on the lower support rotating shaft 2202. The auxiliary gear 2211 meshes with the output gear 2210. Belt pulleys 2214 are sleeved at both ends of the central axis of the auxiliary gear 2211 and at both ends of the fixed shaft 2212. The same belt 2215 is drivingly installed on the two belt pulleys 2214 at the same position. Further, through the cooperation of the output gear 2210 and the auxiliary gear 2211, and with the cooperation of the belt pulleys 2214 and the belt 2215, the fixed shaft 2212 can be continuously rotated. During the excavation process, when soil enters between adjacent excavation units, the fixed shaft 2212 will push the cleaning gears 2213 to continuously rotate, facilitating the dispersion of the entering soil. Then, as the excavation unit continues to work and vibrates, the dispersed soil can be shaken off, achieving the effect of self-cleaning.

[0025] Embodiment Three Refer to Figure 2 , 4 , FIGS. 5 and 6, different from the first embodiment, in order to facilitate the cleaning of the excavated soil, a discharging mechanism 23 is further assembled in the inclined part of the bearing frame 21. The discharging mechanism 23 includes two driving rollers 2301. A synchronous belt 2302 is drivingly arranged on the two driving rollers 2301. The slope of the synchronous belt 2302 is the same as that of the inclined part of the bearing frame 21. A plurality of buckets 2303 are uniformly arranged on the outer surface of the synchronous belt 2302. The buckets 2303 located below the synchronous belt 2302 slide while fitting on the inclined part. A discharging motor 2304 is also installed on the side surface of the inclined part of the bearing frame 21. The output shaft of the discharging motor 2304 is connected to the central axis of the corresponding driving roller 2301. An inclined material dropping groove 2305 is also installed below and near the highest point of the inclined part of the bearing frame 21. Driven by the discharging motor 2304, the driving rollers 2301 and the synchronous belt 2302 can be driven to rotate. The buckets 2303 arranged on the synchronous belt 2302 will move along the inclined part of the bearing frame 21, so that the soil in the bearing frame 21 can be transported to the upper part. Subsequently, the soil falls into the inclined material dropping groove 2305 and can be discharged to one side of the trench, achieving the effect of facilitating the cleaning of the soil.

[0026] Embodiment Four Refer to Figure 2 , 3, as shown in Figures 7 and 9, in order to maintain the stability of the carrier 21 during the excavation process and facilitate the adjustment of its height, a lifting assembly 12 is further provided between the bottom of the vehicle body 1 and the horizontal part of the carrier 21. The lifting assembly 12 includes a mounting frame 1201 fixedly installed at the bottom of the vehicle body 1. Two lifting vertical rails 1202 are vertically installed on the side surface of the mounting frame 1201. Fixed seats 1203 are installed on both side surfaces of the horizontal part of the carrier 21. The fixed seats 1203 are in sliding contact with the lifting vertical rails 1202, and a set of bolts 1204 is provided on the side surface of the fixed seat 1203 and inserted into the lifting vertical rails 1202 for sliding cooperation with them.

[0027] Moreover, two retaining arms extend rearward from the tail of the vehicle body 1. A support assembly 13 is provided between the retaining arms and the inclined part of the carrier 21. The support assembly 13 includes a support frame 1301 fixedly installed on the retaining arms. An auxiliary wheel 1302 is installed extending downward on one side of the support frame 1301. A support vertical rail 1303 extending downward is installed on the other side of the support frame 1301. Sets of bolts 1304 are installed on both side surfaces of the inclined part of the carrier 21. The sets of bolts 1304 are inserted into the support vertical rails 1303 for sliding cooperation with them. Through the cooperation of the set of bolts 1204 and the lifting vertical rails 1202, and the set of bolts 1304 and the support vertical rails 1303, the carrier 21 can be fixedly installed below the vehicle body 1. When it is necessary to adjust the trench excavation depth, the set of bolts 1204 and the set of bolts 1304 can be loosened first, and the carrier 21 can be pushed up and down by the hydraulic driving member 11 to adjust the height. After the adjustment is completed, the set of bolts 1204 and the set of bolts 1304 can be tightened again to continue working and maintain stability. In addition, the adjustment is simple and convenient. Moreover, in order to maintain the stability of the carrier 21 during the forward movement of the vehicle body 1, auxiliary wheels 1302 are also installed on the retaining arm rails, and the auxiliary wheels 1302 are fixedly connected to the support vertical rails 1303, which can also support the inclined part of the carrier 21 to ensure its stability during the movement process.

[0028] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the records in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here.

[0029] The implementation principle of the trench excavation device for water conservancy and hydropower construction in the embodiment of the present invention is as follows: During operation, the height of the functional part 2 can be adjusted according to the depth of the excavated trench. When the depth of the trench excavation needs to be adjusted, first loosen the bolt group one 1204 and the bolt group two 1304 to release the restraint on the carrier 21. At this time, the hydraulic driving part 11 starts to work, pushing the carrier 21 to slide up and down along the lifting vertical rail 1202 and the support vertical rail 1303 to achieve height adjustment. After the adjustment is completed, tighten the bolt group one 1204 and the bolt group two 1304 again to fix the carrier 21 at the appropriate height position, and then the excavation work can be carried out; After the driving motor 2205 is started, the power is first transmitted to the sprocket two 2206, driving the support rotating shaft 2202 to rotate through the driving chain 2207. The rotation of the support rotating shaft 2202 further drives the excavation unit to work. The excavation unit is composed of three sprockets one 2203 and an excavation chain 2204. The rotation of the sprocket one 2203 makes the excavation chain 2204 start to operate. When the shovels on the excavation chain 2204 contact the soil, the excavation work can be carried out. The triangular plate 2201 not only forms a closed structure to support the three sprockets one 2203, but also can effectively prevent soil from entering the gaps between the three sprockets one 2203, avoiding affecting the normal operation of the equipment due to soil blockage; In addition, in order to prevent soil from clogging between adjacent excavation units during excavation, when soil enters between adjacent excavation units during excavation, the fixed shaft 2212 will push the cleaning gear 2213 to rotate continuously, facilitating the dispersion of the entering soil. Then, as the excavation unit continues to work and vibrates continuously, the dispersed soil can be shaken off, achieving the effect of self-cleaning; After that, driven by the discharging motor 2304, the driving roller 2301 and the synchronous belt 2302 can be pushed to rotate. The buckets 2303 arranged on the synchronous belt 2302 will move along the inclined part of the carrier 21, so that the soil in the carrier 21 can be transported upwards. Subsequently, the soil falls into the inclined discharging chute 2305 and can be discharged to one side of the trench, achieving the effect of convenient soil cleaning; And an auxiliary wheel 1302 is also installed on the retaining arm vertical rail, and the auxiliary wheel 1302 is fixedly connected to the support vertical rail 1303, which can also support the inclined part of the carrier 21 to ensure its stability during movement.

[0030] To ensure the stability of the excavation work, the stabilizing bearings and stabilizing tie rods play an important role. The stabilizing bearings are installed at both ends of the uppermost support rotating shaft, and the top of the stabilizing tie rod is fixedly installed on the front side of the baffle. The two cooperate with each other to prevent the support rotating shaft from shifting during rotation, thereby ensuring that multiple excavation units can operate synchronously and stably.

[0031] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present invention, which are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A trench excavation device for water conservancy and hydropower construction, characterized in that, Comprising: A vehicle body (1) and a functional part (2) installed below the vehicle body (1), and a hydraulic drive (11) for cooperatively adjusting the lowering height of the functional part (2) is also installed on the vehicle body (1); The functional part (2) includes a carrier (21), the front end of the carrier (21) is set as a horizontal part, the rear end is set as an inclined part, a digging mechanism (22) is assembled in the horizontal part, and a discharging mechanism (23) is assembled in the inclined part; Wherein, a plurality of excavation units are arranged in the digging mechanism (22), and each excavation unit is composed of a triangular plate (2201), three first sprockets (2203) and an excavation chain (2204) drivingly installed thereon. The three first sprockets (2203) are respectively rotatably installed at the folding positions of the triangular plate (2201), and shovels are evenly assembled on the outer surface of the excavation chain (2204); The discharging mechanism (23) includes two driving rollers (2301), a synchronous belt (2302) is drivingly arranged on the two driving rollers (2301), and a plurality of buckets (2303) are evenly arranged on the outer surface of the synchronous belt (2302).

2. The trench excavation device for water conservancy and hydropower construction according to claim 1, characterized in that: A baffle (2101) is installed at the front end of the horizontal part of the carrier (21), a feeding port (2103) is arranged below the baffle (2101), side plates (2102) are installed at both ends of the baffle (2101) extending forward, and a plurality of excavation units are evenly arranged between the two side plates (2102). The digging mechanism (22) also includes three support rotating shafts (2202), and the first sprockets (2203) in the excavation unit are respectively sleeved on the corresponding support rotating shafts (2202).

3. A trench excavation device for water conservancy and hydropower construction according to claim 2, characterized in that: A driving motor (2205) is also installed at the top in front of the baffle (2101). A second sprocket (2206) is also sleeved on the output shaft of the driving motor (2205) and on the support rotating shaft (2202) close thereto. A driving chain (2207) is drivingly installed on the two second sprockets (2206). Stable bearings (2208) are also installed at both ends of the uppermost support rotating shaft (2202). A stable pull rod (2209) is connected to the outer side surface of the stable bearing (2208), and the top of the stable pull rod (2209) is fixedly installed on the front side surface of the baffle (2101).

4. A trench excavation device for water conservancy and hydropower construction according to claim 1, characterized in that: A cleaning mechanism is also arranged between adjacent excavation units. The cleaning mechanism includes a fixed shaft (2212) and three cleaning gears (2213) sleeved thereon. The cleaning gear (2213) in the middle is arranged with its teeth misaligned with those of the cleaning gears (2213) on both sides.

5. A trench excavation device for water conservancy and hydropower construction according to claim 4, characterized in that: The cleaning mechanism also includes an auxiliary gear (2211). An output gear (2210) is also sleeved on the support rotating shaft (2202) located below. The auxiliary gear (2211) is meshed with the output gear (2210). Pulleys (2214) are sleeved at both ends of the central axis of the auxiliary gear (2211) and at both ends of the fixed shaft (2212). The same belt (2215) is drivingly installed on the two pulleys (2214) at the same position.

6. A trench excavation device for water conservancy and hydropower construction according to claim 1, characterized in that: A discharge motor (2304) is also installed on the side surface of the inclined part of the carrier (21). The output shaft of the discharge motor (2304) is connected to the central axis of the driving roller (2301) at the corresponding position, and an inclined blanking chute (2305) is installed below the position close to the highest point of the inclined part of the carrier (21).

7. A trench excavation device for water conservancy and hydropower construction according to claim 1, characterized in that: A hoisting assembly (12) is further provided between the bottom of the vehicle body (1) and the horizontal part of the carrier (21). The hoisting assembly (12) includes a mounting frame (1201) fixedly installed at the bottom of the vehicle body (1). Two hoisting vertical rails (1202) are vertically installed on the side surface of the mounting frame (1201), and fixing seats (1203) are installed on both side surfaces of the horizontal part of the carrier (21). The fixing seats (1203) are in sliding contact with the hoisting vertical rails (1202), and a first bolt group (1204) is arranged on the side surface of the fixing seat (1203) and is inserted into the hoisting vertical rails (1202) and is in sliding fit with them.

8. A trench excavation device for water conservancy and hydropower construction according to claim 1, characterized in that: Two retaining arms extend rearward from the tail of the vehicle body (1). A support assembly (13) is provided between the retaining arms and the inclined part of the carrier (21). The support assembly (13) includes a support frame (1301) fixedly installed on the retaining arms. An auxiliary wheel (1302) is installed on one side of the support frame (1301) and extends downward.

9. A trench excavation device for water conservancy and hydropower construction according to claim 8, characterized in that: On the other side of the support frame (1301), a support vertical rail (1303) extending downward is installed. Second bolt groups (1304) are installed on both side surfaces of the inclined part of the carrier (21). The second bolt groups (1304) are inserted into the support vertical rails (1303) and are in sliding fit with them.

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