An oilfield fracturing manifold vehicle

Abstract

The present invention discloses an oilfield fracturing manifold vehicle, which relates to the technical field of oilfield fracturing, and comprises a manifold vehicle body, wherein the manifold vehicle body is fixedly connected to a storage box, and a buffer assembly is arranged inside the storage box, and the buffer assembly comprises a delivery elbow and a delivery straight pipe placed inside the storage box; through the cooperation of a stopper and a buffer spring, the water cone effect near the flange can be weakened, and the device utilizes the buffer spring to compress when the stopper is impacted by water flow, so that the buffer spring and the pressure relief hole distribute the impact force instantly concentrated on the stopper to a larger time and area range, thereby reducing the stress concentration at the flange connection part, improving the water cone resistance of the overall pipeline system, and avoiding the problem that when an accumulator is used for buffering in the traditional way, the accumulator cannot directly interfere with the flow pattern of the liquid and cannot directly buffer the water flow, resulting in the energy generated by the water cone effect still impacting the flange connection.

Description

Technical Field

[0001] The present invention relates to the technical field of oilfield fracturing, and in particular to an oilfield fracturing manifold vehicle. Background Art

[0002] The oilfield fracturing manifold is a device specifically used for oil production in the ocean. It transports fracturing fluid to exploit underwater oil fields. When performing oilfield fracturing operations, the pipeline needs to be connected to the fracturing equipment to ensure that the fracturing fluid can be efficiently transported to the formation that needs to be fractured.

[0003] The water coning effect often occurs during the transportation of fracturing fluid through pipelines. This refers to the formation of a cone-shaped concentrated impact path in the pipeline system or reservoir due to factors such as liquid pressure and flow inertia. This phenomenon often occurs at pipe bends, connection points, or when the flow path or speed suddenly changes (such as when the pipe diameter is reduced or expanded). The water coning phenomenon will cause localized impact and pressure concentration on the pipe wall and connection devices, which can easily cause fatigue failure, leakage or vibration.

[0004] Existing technologies typically use accumulators to mitigate the water coning effect. However, accumulators take up a lot of space and can only reduce the water coning pressure near the installation point. Accumulators cannot effectively mitigate shock waves at distant pipelines or branch points. If the water coning effect occurs at multiple points in a pipeline system, the protection provided may not be comprehensive.

[0005] At the same time, the conical pressure shock flow pattern generated by the water cone effect will lead to local high pressure concentration. However, the function of the accumulator is to buffer and balance the pressure fluctuations, rather than directly interfere with the flow pattern of the liquid. Therefore, the accumulator cannot effectively prevent the high-speed liquid from forming a conical shock trend when it bends the pipe or changes the flow path. It can only passively weaken the energy.

[0006] In order to solve the above problems, the inventors proposed an oilfield fracturing manifold vehicle. Summary of the Invention

[0007] In order to solve the above technical problems, an oilfield fracturing manifold vehicle is provided. This technical solution solves the problems raised in the above background technology;

[0008] To achieve the above objectives, the present invention can be implemented by adopting the following technical solutions:

[0009] The present invention provides an oilfield fracturing manifold vehicle, comprising a manifold vehicle body, to which a storage box is fixedly connected;

[0010] The storage box is provided with a buffer assembly inside, and the buffer assembly includes a delivery elbow and a delivery straight pipe placed inside the storage box. The delivery elbow and the delivery straight pipe are provided in plurality, and flanges are fixedly connected to the delivery elbow and the delivery straight pipe. Two flanges are provided on each delivery elbow and the delivery straight pipe, and each two flanges are located at both ends of the delivery elbow and the delivery straight pipe. The inner cavities of the delivery elbow and the delivery straight pipe are fixedly connected with guide rods, and four guide rods are provided inside the delivery elbow and the delivery straight pipe, respectively. The four guide rods A fixing plate is fixedly connected together, a circular hole is provided on the surface of the fixing plate, a long rod is slidably connected to the fixing plate, the long rod is arranged in a rectangular shape and four are provided, a limit plate is fixedly connected to the long rod, and a stopper is fixedly connected to one end of the four long rods away from the limit plate, a cavity structure is provided inside the stopper, a buffer spring is fixedly connected to the side of the stopper close to the fixing plate, and a pressure-relief hole is provided on the side of the stopper close to the fixing plate and the side away from the fixing plate, and a plurality of pressure-relief holes are provided, and the pressure-relief holes are communicated with the cavity in the stopper.

[0011] Preferably, the buffer assembly further comprises a connecting rod rotatably connected to the outer wall of the stopper, four connecting rods are provided, and a split block is rotatably connected to the side of the connecting rod away from the stopper, and the split block is sleeved on the guide rod.

[0012] Preferably, the shape of the stopper is trapezoidal, the four buffer springs are fixedly connected to the fixed plate, and the pressure relief holes are arranged in a cross shape.

[0013] Preferably, the segmentation block is slidably connected to the guide rod, and the segmentation block is in the shape of a triangular prism.

[0014] Preferably, a connecting assembly is provided in the conveying elbow pipe and the conveying straight pipe, and the connecting assembly includes an insert rod fixedly connected to the flange, and the insert rod is respectively provided with three in the conveying elbow pipe and the conveying straight pipe, and the insert rod is fixedly connected to a limiting block on the side of the flange, and the conveying elbow pipe and the conveying straight pipe are fixedly connected with three cavity blocks, and the cavity blocks are respectively provided with three in the conveying elbow pipe and the conveying straight pipe, and the outer wall of the cavity block is provided with a plug hole, and the inner cavity of the plug hole is provided with a slide groove, and a card block is slidably connected in the slide groove, the upper surface of the card block is fixedly connected to the limiting spring, and the upper surface of the card block is rotatably connected to the limiting rod, and the end of the limiting rod away from the card block is fixedly connected to a pull ring, and a limiting hole is provided on the top of the cavity block, and a square hole is provided on the outer surface of the conveying elbow pipe and the conveying straight pipe, and three square holes are respectively arranged in an annular manner and equidistantly on the conveying elbow pipe and the conveying straight pipe.

[0015] Preferably, the insertion rod and the limiting block are adapted to the insertion hole, and the insertion rod and the limiting block are slidably connected to the insertion hole.

[0016] Preferably, a sealing ring is provided on the outer wall of the clamping block, the shape of the clamping block is wedge-shaped, and the limit spring is fixedly connected to the sliding groove.

[0017] Preferably, the limiting rod is composed of a cylinder and a cuboid, the limiting rod is adapted to the limiting hole, the limiting rod is slidably connected to the limiting hole, the limiting hole is communicated with the slide groove, and the limiting hole is communicated with the square hole.

[0018] From the above, the advantages of the present invention are:

[0019] Through the cooperation of the block and the buffer spring, the water cone effect near the flange can be weakened. Compared with the existing technology of using an accumulator for buffering when extracting oil in the ocean, the present device compresses the buffer spring when the block is impacted by the water flow, so that the buffer spring and the pressure relief hole will distribute the impact force instantly concentrated on the block to a larger time and area range, thereby reducing the stress concentration at the flange connection, improving the water cone resistance of the overall pipeline system, and avoiding the problem that when the accumulator is used for buffering in the traditional way, the accumulator cannot directly interfere with the flow pattern of the liquid and cannot directly buffer the water flow, resulting in the energy generated by the water cone effect still impacting the flange connection.

[0020] The reciprocating movement of the dividing block can reduce the water cone effect in the straight conveying pipe. Compared with the existing technology of using accumulators for buffering when extracting oil in the ocean, this device uses multiple straight conveying pipes to be connected and fixed. After the block in the straight conveying pipe is impacted by the water flow, the dividing block moves back and forth along the guide rod, thereby dividing the water flow outside the block, and cutting the push-type pressure wave formed by the water cone effect in the straight pipe into discontinuous small pressure wave groups. Since the momentum of these small wave groups is reduced, the impact force on the wall of the downstream straight conveying pipe is weakened. In addition, a block is provided in each straight conveying pipe, which avoids the problem of limited protection range due to the traditional use of accumulators for buffering, because the accumulator can only be installed at a fixed point of the pipeline system and cannot cover the entire system.

[0021] The reciprocating movement of the dividing block can reduce the water cone effect in the conveying elbow. Compared with the existing technology of using accumulators for buffering when producing oil in the ocean, the present device uses the conveying elbow to be fixed with the conveying straight pipe. After the block on the outside of the conveying elbow is impacted by the water flow, the dividing block in the conveying elbow moves back and forth along the guide rod. The dividing block divides the water flow and redistributes the pressure wave formed by the water cone effect in the curved pipe into small waves, thereby reducing the impact intensity of the water flow on the curved pipe wall of the conveying elbow, reducing the reflectivity of the fluid at the bend, weakening the high-pressure concentration phenomenon at the thin wall of the bend, avoiding the wear of the pipe wall caused by the water cone effect, and avoiding the problem that when the accumulator is used for buffering in the traditional technology, the protection range is relatively limited and the interactive water cone effect in the curved pipe cannot be weakened.

[0022] The limit block is limited by the socket and the block, thereby enhancing the connection stability of the flanges between the pipelines. Compared with the prior art method of using only bolts and nuts to fix the flanges when producing oil in the ocean, this device uses the plug rod and the limit block to insert the socket, and then the socket and the block limit the limit block, thereby fixing the flange between the delivery elbow and the delivery straight pipe, and cooperating with the bolts and nuts to form a double insurance connection, thereby improving the ability of the flange connection to resist water cones, and reducing the impact of the flange connection on the water cone shock wave, avoiding the traditional technology of only using bolts and nuts to fix the flange, relying on the mechanical fastening force between the bolts and nuts, and when the water cone effect occurs when conveying fracturing fluid, due to local impact and vibration, the bolts and nuts become loose, causing leakage and pipeline displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front perspective schematic diagram of the overall structure shown in the present invention;

[0024] Figure 2 It is a cutaway perspective schematic diagram of the interior of the storage box shown in the present invention;

[0025] Figure 3 It is a three-dimensional schematic diagram of the components related to the conveying elbow and conveying straight pipe shown in the present invention;

[0026] Figure 4 It is a schematic diagram of the interior of the delivery elbow shown in the present invention;

[0027] Figure 5 This is an exploded perspective diagram of the fixing plate and the stopper shown in the present invention;

[0028] Figure 6 It is a three-dimensional schematic diagram of the connecting rod and the split block related components shown in the present invention;

[0029] Figure 7 It is a three-dimensional schematic diagram of the flange and the plug rod related components shown in the present invention;

[0030] Figure 8 This is a three-dimensional schematic diagram of the conveying straight pipe and cavity block related components shown in the present invention;

[0031] Figure 9 This is a schematic diagram of the interior of the straight delivery pipe of the present invention;

[0032] Figure 10 The present invention shows Figure 9 A partially enlarged three-dimensional schematic diagram;

[0033] Figure 11 This is an exploded perspective diagram of the cavity block and the limiting rod shown in the present invention;

[0034] Figure 12 It is a three-dimensional schematic diagram of the delivery elbow and the delivery straight pipe shown in the present invention when connected and fixed.

[0035] Wherein, the accompanying drawings in the present invention are:

[0036] 1. Manifold vehicle body; 2. Storage tank;

[0037] Buffer assembly: 31, conveying elbow; 32, conveying straight pipe; 33, flange; 34, guide rod; 35, fixing plate; 36, round hole; 37, long rod; 38, limit plate; 39, stopper; 310, buffer spring; 311, pressure relief hole; 312, connecting rod; 313, dividing block;

[0038] Connecting components: 41, plug rod; 42, limit block; 43, cavity block; 44, socket; 45, slide groove; 46, clamping block; 47, limit spring; 48, limit rod; 49, pull ring; 410, limit hole; 411, square hole. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] See Figures 1 to 12 The embodiment of the present invention is shown in FIG. 1 , and an oilfield fracturing manifold vehicle is described in detail below:

[0041] An oilfield fracturing manifold vehicle, such as Figure 1 and Figure 2 As shown, it includes a manifold vehicle body 1, to which a storage box 2 is fixedly connected;

[0042] like Figures 2 to 5As shown, a buffer assembly is provided inside the storage box 2, and the buffer assembly includes a delivery elbow 31 and a delivery straight pipe 32 placed inside the storage box 2, and multiple delivery elbows 31 and delivery straight pipes 32 are provided, and flanges 33 are fixedly connected to the delivery elbow 31 and delivery straight pipe 32. Two flanges 33 are provided on each delivery elbow 31 and delivery straight pipe 32, and every two flanges 33 are located at both ends of the delivery elbow 31 and the delivery straight pipe 32. The inner cavity walls of the delivery elbow 31 and the delivery straight pipe 32 are fixedly connected with guide rods 34, and four guide rods 34 are provided inside the delivery elbow 31 and the delivery straight pipe 32, respectively, and the four guide rods 34 are cross-arranged, and the four guide rods 34 are fixedly connected to a fixed plate 35 together, and the four guide rods 34 are distributed on the outside of the fixed plate 35. A circular hole 36 is opened on the surface of the fixed plate 35, and a long rod 37 is slidably connected to the fixed plate 35. The rods 37 are arranged in a rectangular shape and are provided with four. The long rods 37 are fixedly connected to the limit plates 38. The limit plates 38 fit against the outer wall of the fixing plate 35, which is used to prevent the long rods 37 from slipping off the fixing plate 35. The ends of the four long rods 37 away from the limit plates 38 are commonly fixedly connected to a stopper 39. A cavity structure is provided inside the stopper 39, and a buffer spring 310 is fixedly connected to the side of the stopper 39 close to the fixing plate 35. The stopper 39 is provided with a pressure relief hole 311 on the side close to the fixing plate 35 and the side away from the fixing plate 35. There are multiple pressure relief holes 311, and the pressure relief holes 311 are connected to the cavity in the stopper 39. When water flows into the stopper 39, the water flows into the cavity in the stopper 39 from the pressure relief holes 311 on the side away from the fixing plate 35, and then flows out from the pressure relief holes 311 on the side close to the fixing plate 35, avoiding the situation where a large pressure difference occurs due to the stopper 39 blocking the water flow.

[0043] Further, such as Figure 5 and Figure 6 As shown, the buffer assembly also includes a connecting rod 312 rotatably connected to the outer wall of the stop block 39. The connecting rod 312 is located on the side of the stop block 39 close to the long rod 37. There are four connecting rods 312. The side of the connecting rod 312 away from the stop block 39 is rotatably connected to a dividing block 313, and the dividing block 313 is sleeved on the guide rod 34.

[0044] Further, such as Figure 5 As shown, the stopper 39 is trapezoidal, and the cross-sectional area of ​​the side of the stopper 39 away from the long rod 37 is larger than the cross-sectional area of ​​the fixing plate 35 , and the four buffer springs 310 are all fixedly connected to the fixing plate 35 .

[0045] Further, such as Figure 5 and Figure 6 As shown, the dividing block 313 is slidably connected to the outer surface of the guide rod 34. The dividing block 313 is in the shape of a triangular prism, and the sharp side of the dividing block 313 faces the direction of the water flow, which is used to divide the water flow.

[0046] Further, such as Figure 3 、 Figures 7 to 12 As shown, the delivery elbow 31 and the delivery straight pipe 32 are both provided with a connecting assembly, which includes an insert rod 41 fixedly connected to the flange 33, the insert rod 41 is located on the inner annular surface of the flange 33, and three insert rods 41 are respectively arranged in an annular manner equidistantly in the delivery elbow 31 and the delivery straight pipe 32. The insert rod 41 is fixedly connected to a limiting block 42 on one side close to the flange 33, and a cavity block 43 is fixedly connected to the inner cavity wall of the delivery elbow 31 and the delivery straight pipe 32. Three cavity blocks 43 are respectively arranged in an annular manner equidistantly in the delivery elbow 31 and the delivery straight pipe 32. A socket 44 is provided on the outer wall of the cavity block 43, and the socket 44 is located on the movement trajectory of the insert rod 41 and the limiting block 42. A slide groove 45 is provided on the top surface of the inner cavity of the socket 44, and the slide groove 45 is connected to the socket 44. A clamping block 46 is dynamically connected, and the part of the clamping block 46 away from the slide groove 45 is located inside the socket 44. The upper surface of the clamping block 46 is fixedly connected to a limit spring 47, and the upper surface of the clamping block 46 is rotatably connected to a limit rod 48. The limit spring 47 is sleeved on the limit rod 48, and the end of the limit rod 48 away from the clamping block 46 is fixedly connected with a pull ring 49. A limit hole 410 is provided on the cavity block 43. The limit hole 410 is located on the side of the slide groove 45 away from the socket 44, and the socket 44 is connected to the slide groove 45. A square hole 411 is provided on the outer surface of the conveying elbow 31 and the conveying straight pipe 32. The square hole 411 is connected to the limit hole 410, and the square hole 411 corresponds to the limit hole 410. Three square holes 411 are equidistantly arranged in a ring on the conveying elbow 31 and the conveying straight pipe 32.

[0047] Further, such as Figures 7 to 9 As shown, the insertion rod 41 and the limiting block 42 are adapted to the insertion hole 44 , and the insertion rod 41 and the limiting block 42 are slidably connected to the insertion hole 44 .

[0048] Further, such as Figure 9 and Figure 11 As shown, a sealing ring is provided on the outer wall of the block 46, which is used to ensure that the fracturing fluid will not leak to the outside when the delivery elbow 31 and the delivery straight pipe 32 are delivering the fracturing fluid. The block 46 is wedge-shaped, and the end of the limit spring 47 away from the block 46 is fixedly connected to the top surface of the inner cavity of the slide 45.

[0049] Further, such as Figure 10 and Figure 11 As shown, the limiting rod 48 is composed of a cylinder and a cuboid, and the cylinder is located below the cuboid. The limiting rod 48 is adapted to the limiting hole 410, and the limiting rod 48 is slidingly connected to the limiting hole 410. The part of the cuboid in the limiting rod 48 away from the slide groove 45 is located inside the limiting hole 410 and the square hole 411.

[0050] While working:

[0051] When the pipes in the device are connected, they can be self-locking. The following are the detailed steps:

[0052] The staff removed the delivery elbow 31 and the delivery straight pipe 32 from the storage tank 2, aligned and fitted the flange 33 on the delivery straight pipe 32 near the fixing plate 35 with the connecting flange on the tank valve. The tank was filled with fracturing fluid and fixed with bolts and nuts. The delivery pipelines were then connected. The following is the connection and fixation between the delivery elbow 31 and the delivery straight pipe 32:

[0053] The staff aligns the flanges 33 on the delivery elbow 31 and the delivery straight pipe 32 on the same axis, and then moves the delivery elbow 31 so that the flange 33 on the delivery elbow 31 close to the fixing plate 35 fits in place with the flange 33 on the delivery straight pipe 32 close to the cavity block 43.

[0054] In the process of fitting the flange 33 on the delivery elbow 31 with the flange 33 on the delivery straight pipe 32, the insertion rod 41 and the limit block 42 are gradually inserted into the socket 44. When the limit block 42 contacts the inclined surface of the block 46, as the limit block 42 continues to move horizontally, the limit block 42 will push the block 46 to move along the slide 45 toward the side away from the socket 44. At this time, the limit spring 47 is in a compressed state. When the top of the limit block 42 contacts the bottom surface of the block 46, the limit block 42 continues to move horizontally. When the limit block 42 leaves the bottom of the block 46, the block 46 is no longer restricted by the limit block 42. At this time, the block 46 moves along the slide groove 45 toward the side close to the insertion hole 44 with the help of the rebound of the limit spring 47 until the block 46 returns to its initial position and stops moving. At this time, the delivery elbow 31 fits the flange 33 on the delivery straight pipe 32 just right. The limit block 42 is located on the side of the block 46 close to the vertical plane, and the limit spring 47 is in a compressed state. In this way, the insertion hole 44 and the block 46 are used to limit the movement of the limit block 42, completing the connection and locking of the delivery elbow 31 and the delivery straight pipe 32. Subsequently, the staff can use bolts and nuts to fix the flange 33 between the delivery elbow 31 and the delivery straight pipe 32.

[0055] If multiple straight delivery pipes 32 need to be connected and fixed, the delivery curved pipe 31 in the above steps is replaced with a straight delivery pipe 32 , and the above steps are repeated.

[0056] In the above process, the limit block 42 is limited by the socket 44 and the block 46, thereby strengthening the connection stability of the flange 33 between the pipelines. Compared with the prior art method of only using bolts and nuts to fix the flange 33 when oil is produced in the ocean, the present device uses the insertion rod 41 and the limit block 42 to insert the socket 44, and then the socket 44 and the block 46 limit the limit block 42, thereby fixing the flange 33 between the delivery elbow 31 and the delivery straight pipe 32, and forming a double insurance connection with the bolts and nuts, thereby improving the ability of the flange 33 connection to resist water cones, reducing the impact of the flange 33 connection on the water cone shock wave, and avoiding the traditional technology of only using bolts and nuts to fix the flange 33, relying on the mechanical fastening force between the bolts and nuts. When the water cone effect occurs when conveying fracturing fluid, the bolts and nuts become loose due to local impact and vibration, causing leakage and pipeline displacement.

[0057] When delivering fracturing fluid, this device can alleviate the water cone effect produced during the delivery process. The following are the detailed steps:

[0058] When the fracturing fluid is transported through a pipeline, the fracturing fluid will impact the block 39 when passing through the pipeline, causing the block 39 to move toward the side close to the fixed plate 35 at the moment of being impacted by the water flow. The block 39 will push the long rod 37 to slide inside the fixed plate 35, thereby compressing the buffer spring 310. During this process, the restoring force of the buffer spring 310 gradually increases until the restoring force of the buffer spring 310 and the impact force of the water flow reach a balance, so that the buffer spring 310 reaches the maximum compression amount.

[0059] When the water flow hits the stopper 39, the water flow passes through the pressure relief hole 311 and flows from the outside of the stopper 39 toward the side close to the fixed plate 35. At this time, the impact strength of the water flow is weakened, so that the restoring force of the buffer spring 310 is greater than the impact force of the water flow, and the water flow begins to rebound. With the help of the rebound of the buffer spring 310, the stopper 39 moves toward the side away from the fixed plate 35.

[0060] When the water flows through the pressure-relief hole 311 and flows from the outside of the stopper 39 toward the side close to the fixed plate 35, the impact force of the water flow is weakened by the pressure-relief hole 311. However, resistance fluctuations will occur during the impact force attenuation stage, causing the buffer spring 310 to perform a reciprocating motion of "compression-rebound-recompression-rebound" until the buffer spring 310 stabilizes. In this way, when the water flow impacts the stopper 39, the stopper 39 moves back and forth;

[0061] During the reciprocating movement of the stopper 39, the compressed buffer spring 310 converts a portion of the water flow impact energy into deformation potential energy of the buffer spring 310, thereby weakening the impact of the high-velocity water flow on the connection of the flange 33. As the buffer spring 310 subsequently rebounds and releases energy, the short-term high-intensity impact is dispersed into a long-term low-intensity pressure wave, thereby reducing the impact of the water cone effect on the connection of the flange 33.

[0062] During the reciprocating movement of the stopper 39, when the stopper 39 moves toward the side close to the fixed plate 35, the stopper 39 pushes the dividing block 313 to move along the guide rod 34 toward the side away from the fixed plate 35 through the connecting rod 312. When the stopper 39 moves toward the side away from the fixed plate 35, the stopper 39 pulls the dividing block 313 to move along the guide rod 34 toward the side close to the fixed plate 35 through the connecting rod 312. In this way, during the reciprocating movement of the stopper 39, the dividing block 313 moves back and forth along the guide rod 34, so that the dividing block 313 can cut off the water flow flowing from the outside of the stopper 39, thereby weakening the water cone effect in the delivery elbow 31 and the delivery straight pipe 32, improving the fluid characteristics in the pipeline system, and thus protecting the pipeline system.

[0063] In the above process, the cooperation of the block 39 and the buffer spring 310 can weaken the water cone effect near the flange 33. Compared with the existing technology of using an accumulator for buffering when extracting oil in the ocean, the present device compresses the buffer spring 310 when the block 39 is impacted by the water flow, so that the buffer spring 310 and the pressure relief hole 311 distribute the impact force instantly concentrated on the block 39 to a larger time and area range, thereby reducing the stress concentration at the connection of the flange 33, improving the anti-water cone ability of the overall pipeline system, and avoiding the problem that when the accumulator is used for buffering in the traditional way, the accumulator cannot directly interfere with the flow pattern of the liquid and cannot directly buffer the water flow, resulting in the energy generated by the water cone effect still impacting the connection of the flange 33.

[0064] In the above process, the reciprocating movement of the dividing block 313 can reduce the water cone effect in the delivery straight pipe 32. Compared with the prior art method of using accumulators for buffering when producing oil in the ocean, the present device uses multiple delivery straight pipes 32 to be connected and fixed. After the block 39 in the delivery straight pipe 32 is impacted by the water flow, the dividing block 313 moves back and forth along the guide rod 34, thereby dividing the water flow outside the block 39, and cutting the push-type pressure wave formed by the water cone effect in the straight pipe into discontinuous small pressure wave groups. Since the momentum of these small wave groups is reduced, the impact force on the wall of the downstream delivery straight pipe 32 is weakened. In addition, a block 39 is provided in each delivery straight pipe 32, which avoids the problem of limited protection range due to the traditional use of accumulators for buffering, because the accumulator can only be installed at a fixed point of the pipeline system and cannot cover the entire system.

[0065] By cutting the water flow through the dividing block 313, the pressure wave formed by the water cone effect in the curved pipe is re-divided into small waves, thereby reducing the impact intensity of the water flow on the curved pipe wall of the conveying curved pipe 31, and reducing the reflectivity of the fluid at the bend, weakening the high-pressure concentration phenomenon at the thin wall of the curved pipe, avoiding the wear of the pipe wall caused by the water cone effect, and avoiding the problem of relatively limited protection range when using accumulators for buffering in traditional technology, and being unable to weaken the interactive water cone effect in the curved pipe.

[0066] When it is necessary to disassemble the delivery elbow 31 and the delivery straight pipe 32, the staff first removes the bolts and nuts that fix the flange 33, and then pulls the three pull rings 49 outward, so that the limit rod 48 drives the clamping block 46 to move along the limit hole 410 in the direction away from the insertion hole 44. When the rectangular parallelepiped in the limit rod 48 leaves the limit hole 410 and the cylinder in the limit rod 48 is still located in the limit hole 410, the staff rotates the pull ring 49 ninety degrees, and the pull ring 49 drives the limit rod 48 to rotate together, and then releases the hand. At this time, the clamping block 46 is in a stationary state, the limit spring 47 is in a compressed state, the cylinder in the limit rod 48 is located in the limit hole 410, and the rectangular parallelepiped in the limit rod 48 is restricted by the limit hole 410 and is located inside the square hole 411;

[0067] When the block 46 is in a stationary state, the block 46 no longer limits the limit block 42. The staff can pull the conveying elbow 31 to remove the insertion rod 41 and the limit block 42 from the insertion hole 44. The staff then rotates the pull ring 49 in the opposite direction. At this time, the block 46 drives the limit rod 48 to move along the limit hole 410 toward the side close to the insertion hole 44 with the help of the rebound of the limit spring 47. Until the block 46 returns to the initial position, the block 46 remains stationary, thereby completing the disassembly of the conveying elbow 31 and the conveying straight pipe 32. If multiple conveying straight pipes 32 need to be disassembled, the conveying elbow 31 in the above steps is replaced with the conveying straight pipe 32, and the above steps are repeated to complete the disassembly between multiple conveying straight pipes 32.

[0068] The above descriptions are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An oilfield fracturing manifold vehicle, comprising a manifold vehicle body (1), characterized in that: A storage box (2) is fixedly connected to the manifold vehicle body (1); A buffer assembly is provided inside the storage box (2), and the buffer assembly includes a delivery bend pipe (31) and a delivery straight pipe (32) placed inside the storage box (2). A plurality of the delivery bend pipes (31) and the delivery straight pipes (32) are provided. Flanges (33) are fixedly connected to the delivery bend pipes (31) and the delivery straight pipes (32). Two flanges (33) are provided on each delivery bend pipe (31) and the delivery straight pipe (32). Each of the two flanges (33) is located at both ends of the delivery bend pipe (31) and the delivery straight pipe (32). The inner cavities of the delivery bend pipe (31) and the delivery straight pipe (32) are fixedly connected to guide rods (34). Four guide rods (34) are provided inside the delivery bend pipe (31) and the delivery straight pipe (32). The four guide rods (34) are fixed together. A fixed plate (35) is fixedly connected, a circular hole (36) is provided on the surface of the fixed plate (35), a long rod (37) is slidably connected to the fixed plate (35), four long rods (37) are arranged in a rectangular shape, a limiting disk (38) is fixedly connected to the long rod (37), and one end of the four long rods (37) away from the limiting disk (38) is fixedly connected to a stopper (39), a cavity structure is provided inside the stopper (39), a buffer spring (310) is fixedly connected to the side of the stopper (39) close to the fixed plate (35), and a pressure relief hole (311) is provided on the side of the stopper (39) close to the fixed plate (35) and the side away from the fixed plate (35), and a plurality of pressure relief holes (311) are provided, and the pressure relief holes (311) are communicated with the cavity in the stopper (39).

2. The oilfield fracturing manifold vehicle according to claim 1, characterized in that: The buffer assembly further comprises a connecting rod (312) rotatably connected to the outer wall of the stopper (39), wherein four connecting rods (312) are provided, and a dividing block (313) is rotatably connected to the side of the connecting rod (312) away from the stopper (39), and the dividing block (313) is sleeved on the guide rod (34).

3. The oilfield fracturing manifold vehicle according to claim 1, characterized in that: The block (39) is trapezoidal in shape, the four buffer springs (310) are fixedly connected to the fixed plate (35), and the pressure relief holes (311) are arranged in a cross shape.

4. The oilfield fracturing manifold vehicle according to claim 2, characterized in that: The segmentation block (313) is slidably connected to the guide rod (34), and the segmentation block (313) is in the shape of a triangular prism.

5. The oilfield fracturing manifold vehicle according to claim 1, characterized in that: The delivery bend (31) and the delivery straight pipe (32) are both provided with a connecting assembly, and the connecting assembly includes an insert rod (41) fixedly connected to the flange (33). Three of the insert rods (41) are respectively provided in the delivery bend (31) and the delivery straight pipe (32). A limiting block (42) is fixedly connected to the side of the insert rod (41) close to the flange (33). Cavity blocks (43) are fixedly connected to the delivery bend (31) and the delivery straight pipe (32). Three of the cavity blocks (43) are respectively provided in the delivery bend (31) and the delivery straight pipe (32). An outer wall of the cavity block (43) is provided with a socket (44). (44) The inner cavity is provided with a slide groove (45), a block (46) is slidably connected in the slide groove (45), the upper surface of the block (46) is fixedly connected to a limit spring (47), the upper surface of the block (46) is rotatably connected to a limit rod (48), the end of the limit rod (48) away from the block (46) is fixedly connected to a pull ring (49), a limit hole (410) is provided on the top of the cavity block (43), and square holes (411) are provided on the outer surfaces of the conveying elbow (31) and the conveying straight pipe (32), and three square holes (411) are respectively arranged in an annular manner and equidistantly on the conveying elbow (31) and the conveying straight pipe (32).

6. The oilfield fracturing manifold vehicle according to claim 5, characterized in that: The inserting rod (41) and the limiting block (42) are adapted to the inserting hole (44), and the inserting rod (41) and the limiting block (42) are slidably connected to the inserting hole (44).

7. The oilfield fracturing manifold vehicle according to claim 5, characterized in that: The outer wall of the clamping block (46) is provided with a sealing ring. The clamping block (46) is in a wedge shape. The limit spring (47) is fixedly connected to the sliding groove (45).

8. The oilfield fracturing manifold vehicle according to claim 5, characterized in that: The limiting rod (48) is composed of a cylinder and a cuboid, the limiting rod (48) is adapted to the limiting hole (410), the limiting rod (48) is slidably connected to the limiting hole (410), the limiting hole (410) is communicated with the slide groove (45), and the limiting hole (410) is communicated with the square hole (411).

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