A high-pressure manifold valve for a fracturing skid-mounted anti-stuck pump

Abstract

This application relates to a high-pressure manifold valve for a fracturing skid-mounted anti-stuck pump, belonging to the technical field of valves, and includes a valve body. This application, by setting up a contraction box, a rotating shaft, an adjusting bolt, an adjusting screw, a sliding plate, a positioning roller, a positioning groove, and positioning teeth, allows the rotating shaft and adjusting bolt to rotate when the valve is opened or closed to the desired position. This rotation causes the adjusting screw to push the sliding plate along the groove, and allows the positioning teeth to engage with the corresponding positioning groove on the surface of the positioning roller. This effectively limits and fixes the rotating rod, preventing rotation caused by accidental handwheel contact, thus avoiding valve plate position deviation. Simultaneously, the fixed connection between the movable plate and the threaded cylinder allows the valve plate to slide stably within the groove when the threaded rod drives the threaded cylinder to rise and fall, ensuring the smoothness of the valve opening and closing process. The mounting connection structure between the bottom cover and the mounting ring facilitates the inspection and maintenance of the internal components of the valve body.

Description

Technical Field

[0001] This application relates to valves, and more particularly to a high-pressure manifold valve for a fracturing skid-mounted anti-stuck pump. Background Technology

[0002] Gate valves are one of the most important types of valves, widely used in petroleum, petrochemical, chemical, metallurgical, power, water conservancy, plumbing, urban construction, fire protection, machinery, coal, food, shipbuilding, power plants, and marine engineering. Typically, a gate valve consists of a valve body with an inlet and an outlet at the bottom. Both the left end of the inlet and the right end of the outlet have sealing surfaces, and a valve plate that can move up and down but does not rotate is provided between the two sealing surfaces for a dynamic seal.

[0003] A current patent (publication number: CN214146660U) discloses a high-pressure resistant gate valve, including a valve body, a valve cover, a gate, a valve stem, and a handwheel. The valve body has a valve cavity and a medium passage, and also includes a clamping assembly. The clamping assembly includes a clamping screw, a clamping handwheel, and a clamping disc. The clamping screw is threaded into a threaded hole in the valve cover. One end of the clamping screw extends into the valve cavity of the valve body and connects to the clamping disc, while the other end is placed outside the valve body and connects to the clamping handwheel. A through-hole is provided along the centerline of the clamping screw. The valve stem is threaded into the through-hole of the clamping screw and extends into the valve cavity to connect to the gate. The other end is connected to the handwheel. By setting up the clamping assembly, the clamping action is assisted, distributing the axial pressure between the valve stem and the valve cover, reducing wear on the valve stem's thread teeth, and improving service life. In addition, the valve stem's movement during clamping is more stable, preventing swaying under medium impact and damage to the valve seat's sealing ring, further improving the gate valve's service life.

[0004] While the device described in the aforementioned comparative document addresses the issue that the axial pressure of the valve stem is primarily borne by the thread, which can easily cause wear on the thread teeth, leading to difficulty in opening and closing the valve and affecting its service life, it lacks a limiting and stabilizing function. After opening or closing the valve, it cannot effectively limit and stabilize the valve's position. Without effective position limiting, operators are prone to accidental opening or closing of the valve during subsequent inspections or maintenance, potentially causing media leakage, sudden pressure changes, and other safety hazards. This is particularly problematic in fracturing skid operations where the pressure of the medium within the high-pressure manifold is extremely high. If the valve shifts due to accidental contact, it can disrupt the normal fracturing operation process and reduce construction efficiency. To address these issues, a high-pressure manifold valve for fracturing skids with anti-stuck pump design is proposed. Utility Model Content

[0005] The purpose of this application is to provide a high-pressure manifold valve for a fracturing skid-mounted anti-blockage pump, which has advantages such as limiting and stabilizing functions, and solves the problem in the prior art that the valve cannot be effectively limited and stabilized after opening or closing, and is prone to position displacement due to accidental contact.

[0006] The high-pressure manifold valve for a fracturing skid anti-blockage pump provided in this application adopts the following technical solution: it includes a valve body, a mounting ring is fixedly connected to the bottom of the valve body, and a bottom cover is installed and connected to the bottom of the mounting ring;

[0007] The valve body has an internal movable groove, and the bottom of the movable groove has an embedded groove. A fixed cylinder is fixedly connected to the top of the valve body. A rotating rod is tightly nested inside the fixed cylinder via bearings. A handwheel and a threaded rod are fixedly connected to the top and bottom of the rotating rod, respectively. A threaded cylinder is threadedly connected to the surface of the threaded rod. A movable plate and a valve plate are fixedly connected to the surface of the threaded cylinder. The valve plate is fixedly connected to the bottom of the movable plate and is slidably connected in the embedded groove. A shrink box is fixedly connected to the surface of the fixed cylinder. A slot is formed inside the shrink box and the fixed cylinder. A rotating shaft is tightly nested inside the side of the shrink box via bearings. A knob and an adjusting bolt are fixedly connected to both ends of the rotating shaft, respectively. An adjusting screw is threadedly connected to the surface of the adjusting bolt. A sliding plate is fixedly connected to the surface of the adjusting screw and is slidably connected in the slot. A positioning rod is fixedly connected to the surface of the rotating rod. The positioning rod has multiple positioning slots on its surface. Positioning teeth are fixedly connected to the side of the sliding plate and are engaged in the positioning slots.

[0008] By adopting the above technical solution, and by setting up a shrink box, rotating shaft, adjusting bolt, adjusting screw, sliding plate, positioning roller, positioning groove, and positioning teeth, when the valve is opened or closed to the required position, turning the knob can drive the rotating shaft and adjusting bolt to rotate. This allows the adjusting screw to push the sliding plate to slide along the slot, and allows the positioning teeth to engage with the corresponding positioning groove on the surface of the positioning roller. This achieves the limiting and fixing of the rotating rod, preventing the rotating rod from rotating due to accidental contact with the handwheel, thus avoiding valve plate position deviation. At the same time, the fixed connection between the movable plate and the threaded cylinder allows the valve plate to slide stably in the groove when the threaded rod drives the threaded cylinder to rise and fall, ensuring the smoothness of the valve opening and closing process. The installation connection structure between the bottom cover and the mounting ring facilitates the inspection and maintenance of the internal components of the valve body.

[0009] Preferably, a raised strip is fixedly connected to the bottom of the inlay groove, and a recessed groove is formed at the bottom of the valve plate.

[0010] By adopting the above technical solution, and by setting the convex strip and the recessed groove, when the valve plate slides in the inlay groove, the convex strip can be embedded in the recessed groove, which can form a stable structure and thus improve the sealing performance of the valve.

[0011] Preferably, limit cylinders are fixedly connected to the four top corners of the valve body, and limit rods are fixedly connected to the four top corners of the movable plate, with the limit rods slidably connected inside the limit cylinders;

[0012] By adopting the above technical solution, and by setting a limiting cylinder and a limiting rod, when the movable plate drives the valve plate to rise and fall under the drive of the threaded rod, the limiting rod will slide stably along the inner wall of the limiting cylinder, which can guide the movement trajectory of the movable plate and prevent the movable plate from deviating or shaking during the movement. This can further ensure the accuracy of the valve plate sliding in the groove and avoid the valve plate tilting from affecting the normal opening and closing and sealing effect of the valve.

[0013] Preferably, a first annular sealing strip is fixedly connected to both sides of the inlay groove, and a second annular sealing strip is fixedly connected to both sides of the valve plate;

[0014] By adopting the above technical solution, and by setting the first annular sealing strip and the second annular sealing strip, when the valve plate is embedded in the inlay groove, the first annular sealing strip and the second annular sealing strip can fit and squeeze each other. By using the elastic deformation of the sealing strip itself to fill the gap between the two, the overall sealing performance of the valve can be enhanced, and fluid can be prevented from leaking from the connection between the valve plate and the inlay groove under high pressure. This can improve the safety and reliability of the high-pressure manifold valve in fracturing skid operations.

[0015] Preferably, a first sealing strip is provided on the top of the movable plate, and a second sealing strip is provided at the top of the interior of the movable groove;

[0016] By adopting the above technical solution, and by setting a first sealing strip and a second sealing strip, when the movable plate moves upward in the movable groove to the open position, the first sealing strip will come into close contact with the second sealing strip and produce elastic deformation. This double sealing structure can effectively prevent fluid from seeping through the gap between the movable plate and the top of the movable groove, thereby improving the sealing integrity of the valve under high pressure conditions.

[0017] Preferably, a first auxiliary sealing strip is provided at the bottom of the movable plate, and a second auxiliary sealing strip is provided at the bottom of the interior of the movable groove;

[0018] By adopting the above technical solution, and by setting the first auxiliary sealing strip and the second auxiliary sealing strip, when the movable plate moves downward to the closed position in the movable groove, the first auxiliary sealing strip and the second auxiliary sealing strip will squeeze each other and undergo elastic deformation, thereby forming a tight sealing fit at the bottom of the movable plate and the movable groove. This can effectively prevent fluid from leaking from the bottom gap between the two, and can enhance the sealing reliability of the valve under different working conditions.

[0019] Preferably, the bottom of the mounting ring is provided with a cleaning port sealing strip, and the top of the bottom cover is provided with a bottom sealing strip;

[0020] By adopting the above technical solution, and by setting a cleaning port sealing strip and a bottom sealing strip, when the bottom cover is assembled and connected with the mounting ring, the cleaning port sealing strip will precisely align with the bottom sealing strip and form a tight fit, which can prevent fluid from leaking from the cleaning port and improve the overall sealing performance of the high-pressure manifold valve.

[0021] Preferably, the valve body is provided with an inlet pipe and an outlet pipe on opposite sides;

[0022] By adopting the above technical solution and setting up inlet and outlet pipes, directional flow of fluid within the valve body can be achieved.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] This high-pressure manifold valve for a fracturing skid-mounted anti-stuck pump features a contraction box, rotating shaft, adjusting bolt, adjusting screw, sliding plate, positioning roller, positioning groove, and positioning teeth. When the valve is opened or closed to the desired position, rotating the knob rotates the rotating shaft and adjusting bolt, causing the adjusting screw to push the sliding plate along the groove. This allows the positioning teeth to engage with the corresponding positioning groove on the positioning roller, thus limiting and fixing the rotating rod. This prevents accidental rotation of the rotating rod due to accidental handwheel contact, avoiding valve plate position deviation. Simultaneously, the fixed connection between the movable plate and the threaded cylinder allows the valve plate to slide stably within the groove when the threaded rod drives the threaded cylinder to rise and fall, ensuring smooth valve opening and closing. The mounting connection structure between the bottom cover and the mounting ring facilitates inspection and maintenance of the internal valve components. Attached Figure Description

[0025] Figure 1 This is a frontal three-dimensional structural diagram of this application;

[0026] Figure 2 This is a side-view perspective three-dimensional structural diagram of this application;

[0027] Figure 3 This is a schematic diagram of the structure in frontal cross-section in this application;

[0028] Figure 4 for Figure 2 A schematic diagram of the structure at point A in the middle, magnified cross-section.

[0029] Figure 5 for Figure 1 A structural schematic diagram of the enlarged cross-section at point B.

[0030] In the diagram: 1. Valve body; 101. Inlet pipe; 102. Drain pipe; 103. Fixed cylinder; 104. Rotating rod; 105. Threaded rod; 106. Threaded cylinder; 107. Movable plate; 108. Valve plate; 109. Embedded groove; 1010. Raised strip plate; 1011. Recessed groove; 1012. Movable groove; 1013. First annular sealing strip; 1014. Second annular sealing strip; 1015. First sealing strip; 1016. Second sealing strip; 1017. First auxiliary sealing strip. 1018. Seal strip; 1019. Second auxiliary sealing strip; 1020. Cleaning port sealing strip; 1021. Limiting cylinder; 1022. Limiting rod; 1023. Slot; 1024. Positioning roller; 1025. Positioning groove; 1026. Rotating shaft; 1027. Knob; 1028. Adjusting bolt; 1029. Adjusting screw; 1030. Sliding plate; 1031. Positioning tooth; 1032. Mounting ring; 1033. Shrink box; 2. Bottom cover; 201. Bottom sealing strip; 3. Handwheel. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0032] Example 1: A high-pressure manifold valve for an anti-stuck pump used in fracturing skids, referring to... Figure 1 , Figure 3 and Figure 4 It includes a valve body 1, a mounting ring 1031 fixedly connected to the bottom of the valve body 1, and a bottom cover 2 installed and connected to the bottom of the mounting ring 1031;

[0033] The valve body 1 has an internal movable groove 1012, and an inlay groove 109 is formed at the bottom of the movable groove 1012. A fixed cylinder 103 is fixedly connected to the top of the valve body 1. A rotating rod 104 is tightly nested inside the fixed cylinder 103 via bearings. A handwheel 3 and a threaded rod 105 are fixedly connected to the top and bottom of the rotating rod 104, respectively. A threaded cylinder 106 is threadedly connected to the surface of the threaded rod 105. A movable plate 107 and a valve plate 108 are fixedly connected to the surface of the threaded cylinder 106. The valve plate 108 is fixedly connected to the bottom of the movable plate 107 and slidably connected in the inlay groove 109. The surface of the fixed cylinder 103 is fixed. A shrink box 1032 is connected to the fixed cylinder 103. A slot 1022 is provided inside the shrink box 1032 and the fixed cylinder 103. A rotating shaft 1025 is tightly nested inside the shrink box 1032 via bearings. A knob 1026 and an adjusting bolt 1027 are fixedly connected to both ends of the rotating shaft 1025, respectively. An adjusting screw 1028 is threaded onto the surface of the adjusting bolt 1027. A sliding plate 1029 is fixedly connected to the surface of the adjusting screw 1028 and slidably connected within the slot 1022. A positioning rod 1023 is fixedly connected to the surface of the rotating rod 104. Multiple positioning points are provided on the surface of the positioning rod 1023. The groove 1024 and the sliding plate 1029 are fixedly connected to a positioning tooth 1030 on the side. The positioning tooth 1030 is engaged in the positioning groove 1024. By setting up the shrink box 1032, the rotating shaft 1025, the adjusting bolt 1027, the adjusting screw 1028, the sliding plate 1029, the positioning roller 1023, the positioning groove 1024, and the positioning tooth 1030, when the valve is opened or closed to the required position, turning the knob 1026 can drive the rotating shaft 1025 and the adjusting bolt 1027 to rotate. This allows the adjusting screw 1028 to push the sliding plate 1029 to slide along the groove 1022, allowing the positioning tooth 1030 to move. The 030 is inserted into the positioning groove 1024 corresponding to the surface of the positioning rod 1023, thereby limiting and fixing the rotating rod 104. This prevents the rotating rod 104 from rotating due to accidental contact with the handwheel 3, thus avoiding the displacement of the valve plate 108. At the same time, the fixed connection between the movable plate 107 and the threaded cylinder 106 allows the valve plate 108 to slide stably in the inlay groove 109 when the threaded rod 105 drives the threaded cylinder 106 to rise and fall, ensuring the smoothness of the valve opening and closing process. The installation connection structure between the bottom cover 2 and the mounting ring 1031 facilitates the inspection and maintenance of the internal components of the valve body 1.

[0034] Please see Figure 3 and Figure 5A raised strip 1010 is fixedly connected to the bottom of the inlay groove 109, and a recessed groove 1011 is provided at the bottom of the valve plate 108. By setting the raised strip 1010 and the recessed groove 1011, when the valve plate 108 slides in the inlay groove 109, the raised strip 1010 can be embedded in the recessed groove 1011, forming a stable structure, thereby improving the sealing performance of the valve. Limiting cylinders 1020 are fixedly connected to the four corners of the top of the valve body 1, and limiting rods 1021 are fixedly connected to the four corners of the top of the movable plate 107. The limiting rods 1021 are slidably connected to the limiting cylinders 1020. Inside the positioning cylinder 1020, by setting the limiting cylinder 1020 and the limiting rod 1021, when the movable plate 107 drives the valve plate 108 to rise and fall under the drive of the threaded rod 105, the limiting rod 1021 will slide stably along the inner wall of the limiting cylinder 1020, which can guide the movement trajectory of the movable plate 107 and prevent the movable plate 107 from deviating or shaking during the movement. This can further ensure the accuracy of the valve plate 108 sliding in the mounting groove 109 and avoid the valve plate 108 tilting, which would affect the normal opening and closing and sealing effect of the valve.

[0035] Please see Figure 1 , Figure 2 and Figure 3A first annular sealing strip 1013 is fixedly connected to both sides of the inner recess 109, and a second annular sealing strip 1014 is fixedly connected to both sides of the valve plate 108. By setting the first annular sealing strip 1013 and the second annular sealing strip 1014, when the valve plate 108 is embedded in the recess 109, the first annular sealing strip 1013 and the second annular sealing strip 1014 can fit and press against each other. By utilizing the elastic deformation of the sealing strips themselves to fill the gap between them, the overall sealing performance of the valve can be enhanced. This prevents fluid leakage from the connection between the valve plate 108 and the recess 109 under high pressure, thereby improving the sealing performance. To enhance the safety and reliability of this high-pressure manifold valve during fracturing skid operations, a first sealing strip 1015 is provided on the top of the movable plate 107, and a second sealing strip 1016 is provided at the top of the inner part of the movable groove 1012. By providing the first sealing strip 1015 and the second sealing strip 1016, when the movable plate 107 moves upward to the open position within the movable groove 1012, the first sealing strip 1015 will come into close contact with the second sealing strip 1016 and undergo elastic deformation. This double-sealing structure effectively prevents fluid from seeping through the gap between the top of the movable plate 107 and the movable groove 1012, thereby improving the valve's sealing integrity under high-pressure conditions. A first auxiliary sealing strip 1017 is provided at the bottom of the movable plate 107, and a second auxiliary sealing strip 1018 is provided at the bottom of the movable groove 1012. By providing the first and second auxiliary sealing strips 1017 and 1018, when the movable plate 107 moves downwards to the closed position within the movable groove 1012, the first and second auxiliary sealing strips 1017 and 1018 will press against each other and undergo elastic deformation, thus forming a tight seal at the bottom of the movable plate 107 and the movable groove 1012. This effectively prevents fluid leakage from the gap at the bottom of the two parts, enhancing the sealing reliability of the valve under different operating conditions. The bottom of the mounting ring 1031 is provided with a cleaning port sealing strip 1019, and the top of the bottom cover 2 is provided with a bottom sealing strip 201. By setting the cleaning port sealing strip 1019 and the bottom sealing strip 201, when the bottom cover 2 is assembled and connected with the mounting ring 1031, the cleaning port sealing strip 1019 will precisely align with the bottom sealing strip 201 and form a tight fit, which can prevent fluid from leaking from the cleaning port and improve the overall sealing performance of the high-pressure manifold valve. The valve body 1 is provided with an inlet pipe 101 and a drain pipe 102 on opposite sides. By setting the inlet pipe 101 and the drain pipe 102, the directional flow of fluid in the valve body 1 can be realized.

[0036] The implementation principle of this application embodiment is as follows: When it is necessary to open the valve, the operator turns the handwheel 3, which drives the rotating rod 104 and the threaded rod 105 to rotate synchronously. Since the threaded rod 105 is threadedly connected to the threaded cylinder 106, the threaded cylinder 106 will drive the movable plate 107 and the valve plate 108 to move upward under the drive of the threaded rod 105, so that the valve plate 108 slides out from the inlay groove 109. At this time, the fluid can enter the valve body 1 through the inlet pipe 101 and be discharged through the drain pipe 102.

[0037] When the valve needs to be closed, turn the handwheel 3 in the opposite direction. The threaded rod 105 rotates in the opposite direction, which drives the threaded cylinder 106, the movable plate 107 and the valve plate 108 to move downward until the valve plate 108 is embedded in the inlay groove 109, thus closing the valve. During the opening and closing of the valve, the limiting rod 1021 at the top of the movable plate 107 will slide along the inner wall of the limiting cylinder 1020 to ensure the stability of the movement trajectory of the movable plate 107 and the valve plate 108.

[0038] During the valve opening and closing process, rotating the knob 1026 on the shrink box 1032 causes the rotating shaft 1025 to drive the adjusting bolt 1027 to rotate. The adjusting screw 1028 pushes the sliding plate 1029 to slide along the slot 1022 until the positioning teeth 1030 on the side of the sliding plate 1029 are engaged in the corresponding positioning groove 1024 on the surface of the positioning rod 1023. This can complete the limiting and fixing of the rotating rod 104 and prevent the handwheel 3 from accidentally touching and causing the valve state to change.

[0039] When the valve is closed, the second annular sealing strips 1014 on both sides of the valve plate 108 are tightly fitted with the first annular sealing strip 1013 in the inlay groove 109, and the first auxiliary sealing strip 1017 at the bottom of the movable plate 107 and the second auxiliary sealing strip 1018 at the bottom of the movable groove 1012 are pressed against each other. The sealing performance of the valve is ensured by the multiple sealing structures, which can prevent fluid leakage.

Claims

1. A high-pressure manifold valve for a fracturing skid-mounted anti-blockage pump, comprising a valve body (1), characterized in that: The bottom of the valve body (1) is fixedly connected to an installation ring (1031), and the bottom of the installation ring (1031) is connected to a bottom cover (2). The valve body (1) has an internal movable groove (1012) and an inlay groove (109) at the bottom. A fixed cylinder (103) is fixedly connected to the top of the valve body (1). A rotating rod (104) is tightly nested inside the fixed cylinder (103) via a bearing. A handwheel (3) and a threaded rod (105) are fixedly connected to the top and bottom of the rotating rod (104) respectively. A threaded cylinder (106) is threadedly connected to the surface of the threaded rod (105). A movable plate (107) and a valve plate (108) are fixedly connected to the surface of the threaded cylinder (106). The valve plate (108) is fixedly connected to the bottom of the movable plate (107) and is slidably connected in the inlay groove (109). A shrink box (1032) is fixedly connected to the surface of the fixed cylinder (103). The shrink box (1032) and the fixed cylinder (1032) are fixedly connected to the valve body (103). The fixed cylinder (103) has a slot (1022) inside. The shrink box (1032) has a rotating shaft (1025) tightly nested inside the side of the shaft (1025) via a bearing. The two ends of the rotating shaft (1025) are respectively fixedly connected to a knob (1026) and an adjusting bolt (1027). The adjusting bolt (1027) has an adjusting screw (1028) threadedly connected to its surface. The adjusting screw (1028) has a sliding plate (1029) fixedly connected to its surface. The sliding plate (1029) is slidably connected in the slot (1022). The rotating rod (104) has a positioning rod (1023) fixedly connected to its surface. The positioning rod (1023) has multiple positioning grooves (1024) on its surface. The sliding plate (1029) has a positioning tooth (1030) fixedly connected to its side. The positioning tooth (1030) is engaged in the positioning groove (1024).

2. The high-pressure manifold valve for a fracturing skid-mounted anti-blockage pump according to claim 1, characterized in that: The bottom of the inlay groove (109) is fixedly connected to a protruding strip plate (1010), and the bottom of the valve plate (108) is provided with a recessed groove (1011).

3. The high-pressure manifold valve for a fracturing skid-mounted anti-blockage pump according to claim 1, characterized in that: The valve body (1) has four fixed corners at the top, each connected to a limiting cylinder (1020), and the movable plate (107) has four fixed corners at the top, each connected to a limiting rod (1021). The limiting rod (1021) is slidably connected inside the limiting cylinder (1020).

4. The high-pressure manifold valve for a fracturing skid anti-blockage pump according to claim 1, characterized in that: The inlay groove (109) is fixedly connected to the opposite sides of the first annular sealing strip (1013), and the valve plate (108) is fixedly connected to the opposite sides of the second annular sealing strip (1014).

5. The high-pressure manifold valve for a fracturing skid-mounted anti-blockage pump according to claim 1, characterized in that: The top of the movable plate (107) is provided with a first sealing strip (1015), and the top of the inside of the movable groove (1012) is provided with a second sealing strip (1016).

6. The high-pressure manifold valve for a fracturing skid anti-blockage pump according to claim 1, characterized in that: The bottom of the movable plate (107) is provided with a first auxiliary sealing strip (1017), and the bottom of the movable groove (1012) is provided with a second auxiliary sealing strip (1018).

7. The high-pressure manifold valve for a fracturing skid anti-blockage pump according to claim 1, characterized in that: The bottom of the mounting ring (1031) is provided with a cleaning port sealing strip (1019), and the top of the bottom cover (2) is provided with a bottom sealing strip (201).

8. The high-pressure manifold valve for a fracturing skid-mounted anti-blockage pump according to claim 1, characterized in that: The valve body (1) is provided with an inlet pipe (101) and an outlet pipe (102) on opposite sides.

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