Oil field fracturing manifold truck

Abstract

The invention discloses an oil field fracturing manifold truck, and relates to the technical field of oil field fracturing, the oil field fracturing manifold truck comprises a manifold truck main body, a storage box is fixedly connected to the manifold truck main body, a buffer assembly is arranged in the storage box, and the buffer assembly comprises a conveying bent pipe and a conveying straight pipe which are placed in the storage box; the water cone effect near the flange plate can be weakened through cooperation of the check block and the buffer spring, the buffer spring is compressed when the check block is impacted by water flow, the buffer spring and the pressure buffering hole distribute impact force instantly concentrated on the check block to a larger time and area range, and therefore stress concentration of the connecting portion of the flange plate is reduced, and the service life of the flange plate is prolonged. The water cone resistance of the whole pipeline system is improved, and the problem that when a traditional energy accumulator is adopted for buffering, the energy accumulator cannot directly interfere with the flowing form of liquid and cannot directly buffer water flow, and consequently energy formed by the water cone effect still impacts the connecting position of the flange plate is solved.

Description

Technical Field

[0001] The 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 specially used for oil production in the ocean. It is used to produce underwater oil fields by conveying fracturing fluid. When fracturing oil fields, it is necessary to connect the pipeline with the fracturing equipment to ensure that the fracturing fluid can be efficiently transported to the formation that needs to be fractured.

[0003] The water cone effect usually occurs in the process of transporting fracturing fluid through pipelines. It means that in the pipeline system or reservoir, due to the influence of factors such as liquid pressure and flow inertia, the liquid flow forms a cone-shaped concentrated impact path. This phenomenon often occurs at pipe bends, connection points, and when the flow suddenly changes its path or speed (such as pipe diameter reduction or expansion). The water cone phenomenon will cause local impact and pressure concentration on the pipe wall and connection device, which is easy to cause fatigue failure, leakage or vibration;

[0004] The existing technology usually adopts the method of installing accumulators to weaken the water cone effect. However, the installation of accumulators takes up a large space, and the accumulators can only reduce the water cone pressure near the installation point. The shock waves of pipelines or branch points far away cannot be effectively weakened. If the water cone effect occurs at multiple points in the pipeline system, its protection effect cannot cover the entire system.

[0005] At the same time, the flow pattern of the conical pressure shock generated by the water cone effect will bring about local high pressure concentration, but 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-velocity liquid from forming a conical shock trend when bending the pipe or changing the flow path, and can only passively weaken the energy;

[0006] In order to solve the above problems, the inventor 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 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] A buffer assembly is provided inside the storage box, and the buffer assembly includes a conveying elbow and a conveying straight pipe placed inside the storage box, and the conveying elbow and the conveying straight pipe are provided in plurality, and flanges are fixedly connected to the conveying elbow and the conveying straight pipe, and two flanges are provided on each conveying elbow and the conveying straight pipe, and each two flanges are located at both ends of the conveying elbow and the conveying straight pipe, and the inner cavities of the conveying elbow and the conveying straight pipe are fixedly connected with guide rods, and four guide rods are provided inside the conveying elbow and the conveying straight pipe, respectively, and 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 limiting disk is fixedly connected to the long rod, a stopper is fixedly connected to one end of the four long rods away from the limiting disk, 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, 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, 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, a side of the connecting rod away from the stopper is rotatably connected to a dividing block, and the dividing block is sleeved on the guide rod.

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

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

[0014] Preferably, a connecting assembly is provided in the conveying elbow and the conveying straight pipe, and the connecting assembly includes an insert rod fixedly connected to the flange, and three insert rods are respectively provided in the conveying elbow and the conveying straight pipe, and the insert rod is fixedly connected to a limiting block on the side of the insert rod close to the flange, and the conveying elbow and the conveying straight pipe are fixedly connected with a cavity block, and three cavity blocks are respectively provided in the conveying elbow 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 block is slidably connected in the slide groove, and the upper surface of the block is fixedly connected to a limiting spring, and the upper surface of the block is rotatably connected to a limiting rod, and a pull ring is fixedly connected to the end of the limiting rod away from the block, and a limiting hole is provided on the top of the cavity block, and square holes are provided on the outer surfaces of the conveying elbow and the conveying straight pipe, and three square holes are respectively arranged in an annular manner and equidistantly on the conveying elbow 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 prior art method of using an accumulator for buffering when producing 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 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 traditionally used for buffering, 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 prior art method of using accumulators for buffering when producing oil in the ocean, the device uses multiple straight conveying pipes to connect and fix. 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 pipeline 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 arranged 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 prior art method of using an accumulator for buffering when producing oil in the ocean, the device uses a conveying elbow to be connected and fixed with a 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 re-divides 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 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 clamping block, thereby enhancing the connection stability of the flange between the pipelines. Compared with the prior art method of only using bolts and nuts to fix the flange connection when oil is produced in the ocean, the device uses the socket and the clamping block to limit the limit block after the insertion of the rod and the limit block into the socket, thereby fixing the flange between the conveying elbow and the conveying straight pipe, and cooperates 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 tightening 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 a 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 pipe and the conveying straight pipe shown in the present invention;

[0026] Figure 4 It is a three-dimensional schematic diagram of the interior of the conveying elbow shown in the present invention;

[0027] Figure 5 It is an exploded stereoscopic schematic 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 parts shown in the present invention;

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

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

[0031] Fig. 9 It is a three-dimensional schematic diagram of the interior of the straight conveying pipe shown in the present invention;

[0032] Fig.10 The present invention shows Fig. 9 A is a partially enlarged three-dimensional schematic diagram;

[0033] Fig.11 It is an exploded stereoscopic schematic diagram of the cavity block and the limiting rod shown in the present invention;

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

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

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

[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, plug hole; 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 technical solutions in the embodiments of the present invention will be clearly and completely described below 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 also Figures 1 to 12 As shown, an embodiment of the present invention is provided, and an oilfield fracturing manifold vehicle is provided and will be 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, and a storage box 2 is fixedly connected to the manifold vehicle body 1;

[0042] like Figures 2 to 5As shown, a buffer assembly is provided inside the storage box 2, and the buffer assembly includes a conveying elbow 31 and a conveying straight pipe 32 placed inside the storage box 2, and multiple conveying elbows 31 and conveying straight pipes 32 are provided, and flanges 33 are fixedly connected to the conveying elbow 31 and the conveying straight pipe 32. Two flanges 33 are provided on each conveying elbow 31 and the conveying straight pipe 32, and every two flanges 33 are located at both ends of the conveying elbow 31 and the conveying straight pipe 32. The inner cavity walls of the conveying elbow 31 and the conveying straight pipe 32 are fixedly connected with guide rods 34, and four guide rods 34 are respectively provided inside the conveying elbow 31 and the conveying straight pipe 32, and the four guide rods 34 are cross-arranged, and the four guide rods 34 are commonly fixedly connected to a fixing plate 35, and the four guide rods 34 are distributed on the outer side of the fixing plate 35. A circular hole 36 is opened on the surface of the fixing plate 35, and a long rod 37 is slidably connected to the fixing plate 35. The rods 37 are arranged in a rectangular shape and are provided with four. A limit plate 38 is fixedly connected to the long rod 37, and the limit plate 38 fits against the outer wall of the fixing plate 35, which is used to prevent the long rod 37 from slipping off the fixing plate 35. The ends of the four long rods 37 away from the limit plate 38 are commonly fixedly connected to a stopper 39, and 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 fixing plate 35. The side of the stopper 39 close to the fixing plate 35 and the side away from the fixing plate 35 are both provided with a pressure relief hole 311. There are a plurality of 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 hole 311 on the side away from the fixing plate 35, and then flows out from the pressure relief hole 311 on the side close to the fixing plate 35, so as to avoid a large pressure difference 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, four connecting rods 312 are provided, and 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, and the dividing block 313 is in the shape of a triangular prism. The sharp side of the dividing block 313 faces the direction of the water flow, and 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 connecting components, and the connecting components include 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, and a side of the insert rod 41 close to the flange 33 is fixedly connected to a limiting block 42, and a cavity block 43 is fixedly connected to the inner cavity wall of the delivery elbow 31 and the delivery straight pipe 32, and three cavity blocks 43 are respectively arranged in an annular manner equidistantly in the delivery elbow 31 and the delivery straight pipe 32, and an outer wall of the cavity block 43 is provided with a socket 44, and the socket 44 is located on the movement trajectory of the insert rod 41 and the limiting block 42, and a slide groove 45 is provided on the inner cavity top surface of the socket 44, and the slide groove 45 is connected to the socket 44, and the slide groove 45 is A clamping block 46 is movably connected, and the part of the clamping block 46 away from the slide groove 45 is located inside the insertion hole 44. The upper surface of the clamping block 46 is fixedly connected to a limiting spring 47, and the upper surface of the clamping block 46 is rotatably connected to a limiting rod 48. The limiting spring 47 is sleeved on the limiting rod 48, and the end of the limiting rod 48 away from the clamping block 46 is fixedly connected with a pull ring 49. A limiting hole 410 is provided on the cavity block 43, and the limiting hole 410 is located on the side of the slide groove 45 away from the insertion hole 44, and the insertion hole 44 is connected to the slide groove 45. Square holes 411 are provided on the outer surfaces of the conveying elbow 31 and the conveying straight pipe 32. The square holes 411 are connected to the limiting holes 410, and the square holes 411 correspond to the limiting holes 410. Three square holes 411 are equidistantly arranged in an annular manner on the conveying elbow 31 and the conveying straight pipe 32.

[0047] Further, such as Figures 7 to 9 As shown, the insert rod 41 and the limit block 42 are matched with the insert hole 44, and the insert rod 41 and the limit block 42 are slidably connected with the insert hole 44.

[0048] Further, such as Fig. 9 and Fig.11 As shown, a sealing ring is provided on the outer wall of the block 46, and the sealing ring is used to ensure that the fracturing fluid will not leak to the outside when the conveying elbow 31 and the conveying straight pipe 32 convey the fracturing fluid. The shape of 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 groove 45.

[0049] Further, such as Fig.10 and Fig.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, the limiting rod 48 is slidably connected to the limiting hole 410, and 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] When working:

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

[0052] The staff takes out the delivery elbow 31 and the delivery straight pipe 32 from the storage box 2, aligns and fits the flange 33 on the delivery straight pipe 32 close to the fixing plate 35 with the connecting flange on the valve of the liquid storage tank, and fixes the fracturing fluid in the liquid storage tank with bolts and nuts, and then connects the delivery pipeline. The following is the connection and fixation between the delivery elbow 31 and the delivery straight pipe 32:

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

[0054] In the process of fitting the flange 33 on the conveying elbow 31 with the flange 33 on the conveying straight pipe 32, the insertion rod 41 and the limit block 42 are gradually inserted into the insertion hole 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 groove 45 in the direction away from the insertion hole 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 the initial position, and the block 46 stops moving. At this time, the delivery elbow 31 fits the flange 33 on the delivery straight pipe 32 just right, and 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, and the connection and locking of the delivery elbow 31 and the delivery straight pipe 32 are completed. Then the staff can use bolts and nuts to fix the flange 33 that fits between the delivery elbow 31 and the delivery straight pipe 32;

[0055] If a plurality of conveying straight pipes 32 need to be connected and fixed, the conveying curved pipe 31 in the above steps is replaced with the conveying straight 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, so as to enhance 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, so as to fix the flange 33 between the delivery elbow 31 and the delivery straight pipe 32, and cooperate with the bolts and nuts to form a double insurance connection, so as to improve the ability of the flange 33 connection to resist water cones, reduce the impact of the flange 33 connection on the water cone shock wave, and avoid the traditional technology that only uses 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 during the delivery of fracturing fluid, the bolts and nuts become loose due to local impact and vibration, causing leakage and pipeline displacement.

[0057] When the device is used to transport fracturing fluid, it can alleviate the water cone effect produced during the transportation process. The following are the detailed steps:

[0058] When the fracturing fluid is transported by pipeline, the fluid of the fracturing fluid will impact the block 39 when passing through the pipeline, so that the block 39 moves toward the side close to the fixed plate 35 at the moment of being impacted by the water flow, and the block 39 will push the long rod 37 to slide in 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 are balanced, 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 fixing plate 35, the impact force of the water flow is weakened by the pressure relief hole 311. However, resistance fluctuations will be generated during the impact force attenuation stage, causing the buffer spring 310 to reciprocate in the process of "compression-rebound-recompression-rebound" until the buffer spring 310 tends to be stable. 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 buffer spring 310 in the compressed state converts a part of the water flow impact energy into the deformation potential energy of the buffer spring 310, thereby weakening the impact of the high-speed water flow on the connection of the flange 33. As the buffer spring 310 rebounds and releases energy, the short-term high-intensity impact is dispersed into a long-term low-intensity pressure wave, thereby reducing the influence of the water cone effect on the connection of the flange 33;

[0062] During the reciprocating movement of the block 39, when the block 39 moves toward the direction close to the fixed plate 35, the block 39 pushes the split block 313 to move along the guide rod 34 toward the direction away from the fixed plate 35 through the connecting rod 312. When the block 39 moves toward the direction away from the fixed plate 35, the block 39 pulls the split block 313 to move along the guide rod 34 toward the direction close to the fixed plate 35 through the connecting rod 312. In this way, during the reciprocating movement of the block 39, the split block 313 moves back and forth along the guide rod 34, so that the split block 313 can cut off the water flow flowing from the outside of the block 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 prior art method of using an accumulator for buffering when producing 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 straight delivery pipe 32. Compared with the prior art method of using accumulators for buffering when producing oil in the ocean, the present device uses multiple straight delivery pipes 32 to be connected and fixed. After the block 39 in the straight delivery 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 pipeline 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 delivery pipe 32 is weakened. In addition, a block 39 is arranged in each straight delivery 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, 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 and inability to weaken the interactive water cone effect in the curved pipe when the accumulator is used for buffering in the traditional technology.

[0066] When it is necessary to disassemble the conveying elbow 31 and the conveying straight pipe 32, the staff first removes the bolts and nuts fixing the flange 33, and then pulls the three pull rings 49 outward, so that the limiting rod 48 drives the block 46 to move along the limiting hole 410 in the direction away from the side of the plug hole 44. When the rectangular parallelepiped in the limiting rod 48 leaves the limiting hole 410 and the cylinder in the limiting rod 48 is still located in the limiting hole 410, the staff rotates the pull ring 49 ninety degrees, and the pull ring 49 drives the limiting rod 48 to rotate together, and then lets go. At this time, the block 46 is in a stationary state, the limiting spring 47 is in a compressed state, the cylinder in the limiting rod 48 is located in the limiting hole 410, and the rectangular parallelepiped in the limiting rod 48 is restricted by the limiting 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, and the staff can pull out the conveying elbow 31 to pull the insertion rod 41 and the limit block 42 out of the insertion hole 44. The staff then reversely rotates the pull ring 49. 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. After 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 by 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 protection scope 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 arranged inside the storage box (2), and the buffer assembly comprises a conveying curved pipe (31) and a conveying straight pipe (32) placed inside the storage box (2). A plurality of the conveying curved pipes (31) and the conveying straight pipes (32) are arranged. A flange (33) is fixedly connected to each of the conveying curved pipes (31) and the conveying straight pipes (32). Two flanges (33) are arranged on each of the conveying curved pipes (31) and the conveying straight pipes (32). Each of the two flanges (33) is located at the two ends of the conveying curved pipes (31) and the conveying straight pipes (32). A guide rod (34) is fixedly connected to the inner cavity of the conveying curved pipes (31) and the conveying straight pipes (32). Four guide rods (34) are arranged inside the conveying curved pipes (31) and the conveying straight pipes (32). The four guide rods (34) are fixedly connected 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 of the long rods (37) are arranged in a rectangular shape, a limiting plate (38) is fixedly connected to the long rod (37), one end of the four long rods (37) away from the limiting plate (38) is commonly 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), 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), a plurality of the 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 also includes a connecting rod (312) rotatably connected to the outer wall of the stopper (39), 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 shape of the stopper (39) is trapezoidal, the four buffer springs (310) are fixedly connected to the fixing 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 partition block (313) is slidably connected to the guide rod (34), and the partition block (313) is in the shape of a triangular prism.

5. The oilfield fracturing manifold vehicle according to claim 1, characterized in that: The conveying curved pipe (31) and the conveying straight pipe (32) are both provided with a connecting assembly, and the connecting assembly comprises an insert rod (41) fixedly connected to the flange (33), and three of the insert rods (41) are respectively provided in the conveying curved pipe (31) and the conveying straight pipe (32), and a limiting block (42) is fixedly connected to one side of the insert rod (41) close to the flange (33), and a cavity block (43) is fixedly connected to the conveying curved pipe (31) and the conveying straight pipe (32), and three of the cavity blocks (43) are respectively provided in the conveying curved pipe (31) and the conveying straight pipe (32), and an outer wall of the cavity block (43) is provided with a plug hole (44), and the plug hole (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 insert rod (41) and the limit block (42) are matched with the insert hole (44), and the insert rod (41) and the limit block (42) are slidably connected with the insert 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 connected to the slide groove (45), and the limiting hole (410) is connected to the square hole (411).

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