A machining device for ultra-low temperature ball valve seat

Abstract

The present invention relates to the field of valve seat machining technology, and discloses a cryogenic ball valve seat machining device, including a workbench, the top of the workbench is rotatably connected to a valve seat fixing platform, a valve seat is placed on the valve seat fixing platform, the valve seat fixing platform is used to fix the valve seat, a lifting platform is installed on the top of the workbench for installing a grinding device, and also includes: an X-axis clamping mechanism, which is provided with two and symmetrically arranged inside the valve seat fixing platform along the X-axis direction, and is used to clamp the valve seat along the X-axis direction. The present invention provides an X-axis clamping mechanism and a Y-axis clamping mechanism, which can be adjusted by rotating the threaded rod, thereby pushing the two X-axis clamping plates and the two Y-axis clamping plates to move relative to each other at the same time, thereby achieving stable clamping of valve seats of different diameters for grinding processing, and improving the accuracy during clamping.

Description

Technical Field

[0001] The invention relates to the technical field of valve seat machining, and in particular to a valve seat machining device for an ultra-low temperature ball valve. Background Art

[0002] Ultra-low temperature ball valves are valves designed for working in extremely low temperature environments. They are mainly used in the transportation systems of liquefied natural gas (LNG), liquid oxygen, liquid nitrogen and other cryogenic media. The valve seat on the ultra-low temperature ball valve plays a sealing role. The processing accuracy of the ball valve seat directly affects the sealing performance of the ball valve. The ball valve seat is an annular structure, and the upper end of its inner side is a wedge-shaped structure. The outer wall of the valve seat is provided with an annular groove for installing a sealing ring. The wedge-shaped structure and the annular groove of the ball valve seat are processed by cutting and grinding.

[0003] For example, a cryogenic ball valve seat machining device is disclosed in the announcement number CN111545833B, which includes a base plate, a cylinder, a lifting platform, a placement rack, a rotating motor, a locking mechanism, a moving rack and a moving mechanism. A lifting platform is installed on the top of the base plate through a cylinder, and an annular slide groove is arranged in the middle of the lifting platform. The lower end of the placement rack is connected to the annular slide groove by sliding fit. The placement rack is a hollow cylindrical structure with an opening at the lower end. The output shaft of the rotating motor is connected to the lower side wall of the middle part of the placement rack. The locking mechanism is installed on the placement rack, and the lower end of the moving rack is connected to the top of the base plate, and the moving mechanism is installed on the moving rack. The present invention can solve the problems existing in the existing cutting process of ball valve seats: there is no locking fixture for the valve seat structure when cutting and locking the ball valve seat, and there is a certain deviation between the center position of the ball valve seat after locking and the center position of the rotating shaft, which causes poor cutting accuracy of the valve seat.

[0004] However, during the existing cutting process on the ball valve seat, due to the different sizes of ball valves, ball valve seats of different sizes need to be processed, and then the valve seats of different sizes need to be clamped. In the above device, by sequentially adjusting the locking mechanisms in four different directions, there will be deviations when rotating, which affects the fixing accuracy of the ball valve seat. Therefore, an ultra-low temperature ball valve seat machining device is proposed to solve the above-mentioned problem. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a low temperature ball valve seat machining device in view of the deficiencies in the above-mentioned prior art.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a cryogenic ball valve seat machining device, comprising a workbench, the top of which is rotatably connected to a valve seat fixing platform, a valve seat is placed on the valve seat fixing platform, the valve seat fixing platform is used to fix the valve seat, and a lifting platform is installed on the top of the workbench for installing a grinding device; and also includes:

[0007] Two X-axis clamping mechanisms are provided and are symmetrically arranged inside the valve seat fixing platform along the X-axis direction, and are used to clamp the valve seat along the X-axis direction;

[0008] Two Y-axis clamping mechanisms are provided and are symmetrically arranged inside the valve seat fixing platform along the Y-axis direction, and are used to clamp the valve seat along the Y-axis direction;

[0009] Wherein, each of the X-axis clamping mechanisms comprises:

[0010] The threaded rod has two ends rotatably connected to the inner wall of the valve seat fixing platform through bearings, and the left side thereof movably penetrates the valve seat fixing platform and extends outwardly to be connected with an adjusting knob for rotating the threaded rod;

[0011] The movable plate is threadedly connected to the outer wall of the threaded rod and fits with the top of the inner wall of the valve seat fixing platform, and the movable plate is driven to move by the rotation of the threaded rod;

[0012] An X-axis clamping plate is connected to one side of the movable plate and moves along the X-axis direction with the movable plate;

[0013] Two X-axis sliding rods are movably connected in movable holes provided on the X-axis clamping plate, and one end of the two X-axis sliding rods is fixedly connected with an X-axis clamping block for clamping the valve seat.

[0014] Preferably, the X-axis clamping mechanism further comprises:

[0015] Two first springs are connected to the other end of the X-axis slide rod and the inner wall of the movable hole, and are used to push the X-axis slide rod and the X-axis clamping block to move and initially clamp the valve seat.

[0016] Preferably, each of the Y-axis clamping mechanisms comprises:

[0017] A Y-axis clamping plate is arranged inside the valve seat fixing platform and is used to clamp the valve seat along the Y-axis direction. The interior of the Y-axis clamping plate is hollow and has a mounting groove. A push block is installed in the mounting groove and is used to push the Y-axis clamping plate to move along the Y-axis direction.

[0018] Two sliding blocks are fixedly connected to the top of the Y-axis clamping plate and slidably connected to the top of the inner wall of the valve seat fixing platform;

[0019] Two Y-axis slide bars, one end of which movably passes through the Y-axis clamping plate and is connected to the push block, so as to push the push block to move, and the other ends of the two Y-axis slide bars are connected to the connecting block;

[0020] A fixed block is fixedly connected to the top of the inner wall of the valve seat fixing platform, one side of which is rotatably connected to an adjusting screw through a bearing, one end of the adjusting screw is threadedly connected to the connecting block, and is used to adjust the movement of the connecting block and the two Y-axis slide bars;

[0021] The other ends of the two Y-axis slide rods movably penetrate the fixed block and are connected to the threaded rod through a bevel gear set, so that the threaded rod synchronously drives the adjusting screw to rotate, thereby adjusting the movement of the Y-axis slide rod, the push block and the Y-axis clamping plate.

[0022] Preferably, the Y-axis clamping mechanism further comprises:

[0023] An elastic pad, movably connected in the Y-axis clamping plate, is used to elastically contact the valve seat;

[0024] The push rod has two ends connected with an elastic pad and a push block respectively. The push block is arc-shaped and elastically installed in the Y-axis clamping plate, and is used to generate deformation to push the elastic pad to move and contact closely with the valve seat.

[0025] Preferably, an internal clamping mechanism is provided inside the valve seat fixing platform for clamping the inner ring of the valve seat;

[0026] The internal clamping mechanism comprises:

[0027] A connecting plate, fixedly connected to the bottom of the inner wall of the valve seat fixing platform through a connecting rod;

[0028] An adjusting disk is rotatably connected to the outer wall of the connecting rod, and a snail-shaped movable hole is opened on the adjusting disk;

[0029] Four limiting rods are equally arranged in the volute-shaped movable hole, and the outer wall of the limiting rod is rotatably connected to a guide wheel and is slidably connected in the volute-shaped movable hole;

[0030] The outer wall of the connection plate is connected to four fixing rods, and the outer wall of each fixing rod is slidably connected to a sliding sleeve, the bottom of the sliding sleeve is connected to the top of the limiting rod, and the end of the sliding sleeve is used to clamp the inner ring of the valve seat;

[0031] The worm is rotatably connected to the inner wall of the valve seat fixing platform at both ends through bearings, and the left side movably penetrates the valve seat fixing platform and extends outward. The outer wall of the adjusting disk is provided with a worm wheel groove, which is engaged with the worm to drive the adjusting disk to rotate.

[0032] Preferably, a mounting cavity is provided on the top of the valve seat fixing platform, and a pop-up mechanism is provided in the mounting cavity for popping out the valve seat;

[0033] The ejection mechanism comprises:

[0034] A discharge tray, movably connected to the middle of the valve seat fixing platform, for placing the valve seat;

[0035] Four wedge-shaped blocks are equally installed in the movable grooves provided on the installation cavity, and are used to push the discharge tray to move upward;

[0036] One end of the four movable rods is respectively connected to the wedge blocks, and the other end is movably connected in the movable groove. The outer wall of each movable rod is also installed with a second spring for pushing the wedge blocks to move toward the discharge tray.

[0037] Preferably, the ejection mechanism further comprises:

[0038] Two plug plates, one end of which is respectively inserted into the discharge tray, and the other end of which movably passes through the valve seat fixing platform and extends outward, so as to limit the upward movement of the discharge tray. A slot is provided on the discharge tray, and one end of the plug plate is inclined and fits with the inclined surface in the slot;

[0039] The two sides of the plug plate are respectively fixedly connected with L-shaped movable plates, and the L-shaped movable plates are slidably connected in the installation cavity. The L-shaped movable plates on the left and right sides are staggered up and down, and the opposite sides thereof are respectively provided with tooth grooves;

[0040] The gear is installed in the installation cavity and meshes with the tooth grooves of the L-shaped movable plates on the left and right sides respectively, so as to drive the L-shaped movable plates on both sides to move synchronously;

[0041] An elastic plate is installed in the installation cavity. Four elastic plates are provided and are respectively installed on both sides of the two plug plates. The elastic plates are fitted with the L-shaped movable plate and are used to push the L-shaped movable plate to move toward the middle.

[0042] Preferably, the ejection mechanism further comprises:

[0043] The wedge-shaped push rod is slidably connected in the slide groove of the valve seat fixing platform and is connected to the L-shaped movable plate;

[0044] An L-shaped push plate is slidably connected to the valve seat fixing platform and has a wedge-shaped setting on one side, which is used to push the valve seat to move upward and separate from the discharge tray;

[0045] The third spring has a round rod connected to one end and is connected to the slide groove through the round rod. The other end of the round rod and the third spring are movably connected in the circular hole opened in the L-shaped push plate, which is used to push the L-shaped push plate toward the valve seat to separate the material tray and the valve seat.

[0046] The present invention adopts the above technical solution, which can bring the following beneficial effects:

[0047] 1. The ultra-low temperature ball valve seat machining device, through the X-axis clamping mechanism and the Y-axis clamping mechanism, can adjust the rotation of the threaded rod, thereby pushing the two X-axis clamping plates and the two Y-axis clamping plates to move relative to each other at the same time, thereby stably clamping valve seats of different diameters for grinding and processing, and improving the accuracy of clamping.

[0048] 2. The ultra-low temperature ball valve seat machining device, by setting the cooperation of the X-axis clamping mechanism and the Y-axis clamping mechanism, uses the first spring to push the X-axis slide rod and the X-axis clamping block to initially clamp and fix the valve seat with the sealing groove, so as to facilitate the placement and fixing of the valve seat. At this time, the valve seat can be fixed from the inner ring of the valve seat to determine the central axis of the valve seat, and the four limit rods on the internal clamping mechanism are moved on the adjusting disk to push the four sliding sleeves to move on the fixing rod, so as to fix the inner ring of the valve seat with different diameters.

[0049] 3. The valve seat machining device of the ultra-low temperature ball valve, after the X-axis clamping block initially clamps and fixes the valve seat, the threaded rod is rotated and the X-axis clamping plate moves toward the X-axis clamping block, and the Y-axis clamping plate moves toward the valve seat, thereby fixing the valve seat in the Y-axis direction. The threaded rod is continued to be rotated, and the X-axis clamping plate continues to move toward the X-axis clamping block, and the Y-axis sliding rod continues to move to push the push block to change its shape, thereby pushing the push rod and the elastic pad to contact the valve seat, thereby adapting to the valve seat without a sealing groove, and increasing the friction on the valve seat to improve the clamping firmness of the valve seat.

[0050] 4. The ultra-low temperature ball valve seat machining device, when ball valve seats and discharge trays of different sizes are placed on the valve seat fixing table for processing, can push the wedge block to move through the reset of the second spring to squeeze the discharge tray to move upward, thereby realizing the discharge of the valve seat and facilitating the replacement of discharge trays with different inner diameters to adapt to the fixation of valve seats of different sizes; at the same time, one side of the plug plate is wedge-shaped and inclined to the slot and fits, which will limit the reset of the second spring when it is out of the plug-in state, push the wedge block to move quickly, avoid the rapid pop-up of the discharge tray, thereby realizing the slow discharge of the valve seat, avoiding it from being hit and affecting the processing accuracy, and the discharge tray and the valve seat can be replaced at the same time.

[0051] 5. The valve seat machining device of the ultra-low temperature ball valve, when discharging, pulls the plug plate, which will drive the wedge-shaped push rod to move. At this time, the force on the L-shaped push plate at the inclined part of the wedge-shaped push rod is reduced, and it is pushed to the valve seat under the action of the third spring, and then the plug plate is continuously pulled until the discharging tray is first separated upward, and the L-shaped push plate will contact the valve seat and squeeze it, and continue to push the valve seat upward through its wedge-shaped part, thereby separating the valve seat and the discharging tray, and then facilitating direct removal of the valve seat for discharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic diagram of the structure of the present invention;

[0053] Figure 2 It is a schematic diagram of the structure of the ejection mechanism of the present invention;

[0054] Figure 3Schematic diagram of the partial explosion structure of the ejection mechanism of the present invention

[0055] Figure 4 This is a schematic diagram of the internal structure of the valve seat fixing platform of the present invention when viewed from above;

[0056] Figure 5 It is a schematic diagram of the cross-sectional structure of the X-axis clamping mechanism of the present invention;

[0057] Figure 6 For the present invention Figure 5 The enlarged structural diagram at A in the middle;

[0058] Figure 7 For the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0059] Figure 8 It is a schematic diagram of the cross-sectional structure of the internal clamping mechanism of the present invention.

[0060] In the figure: 1, workbench; 2, lifting platform; 3, valve seat fixing platform; 4, valve seat; 5, X-axis clamping mechanism; 51, threaded rod; 52, movable plate; 53, X-axis clamping plate; 54, X-axis slide bar; 55, X-axis clamping block; 56, first spring; 6, Y-axis clamping mechanism; 61, Y-axis clamping plate; 62, push block; 63, Y-axis slide bar; 64, adjusting screw; 65, fixing block; 66, bevel gear set; 67, elastic pad; 6 8. Push rod; 69. Sliding block; 7. Internal clamping mechanism; 71. Adjusting plate; 72. Limiting rod; 73. Connecting plate; 74. Fixing rod; 75. Sliding sleeve; 76. Worm; 8. Ejection mechanism; 81. Insert plate; 82. L-shaped movable plate; 83. Discharging plate; 84. Elastic plate; 85. Gear; 86. Wedge block; 87. Movable rod; 88. Second spring; 89. Wedge-shaped push rod; 810. L-shaped push plate; 811. Third spring. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0062] See also Figure 1-8 One embodiment of the present invention is: a cryogenic ball valve seat machining device, comprising a workbench 1, a valve seat fixing platform 3 is rotatably connected to the top of the workbench 1, a valve seat 4 is placed on the valve seat fixing platform 3, the valve seat fixing platform 3 is used to fix the valve seat 4, and a lifting platform 2 is installed on the top of the workbench 1 for installing a grinding device; and further comprising:

[0063] Two X-axis clamping mechanisms 5 are provided and are symmetrically arranged inside the valve seat fixing platform 3 along the X-axis direction, and are used to clamp the valve seat 4 along the X-axis direction;

[0064] Two Y-axis clamping mechanisms 6 are provided and are symmetrically arranged inside the valve seat fixing platform 3 along the Y-axis direction, and are used to clamp the valve seat 4 along the Y-axis direction;

[0065] Wherein, each X-axis clamping mechanism 5 comprises:

[0066] The threaded rod 51 has two ends rotatably connected to the inner wall of the valve seat fixing platform 3 through bearings, and the left side thereof movably penetrates the valve seat fixing platform 3 and extends outwardly to be connected to an adjusting knob for rotating the threaded rod 51;

[0067] The movable plate 52 is threadedly connected to the outer wall of the threaded rod 51 and fits with the top of the inner wall of the valve seat fixing platform 3. The threaded rod 51 rotates to drive the movable plate 52 to move;

[0068] An X-axis clamping plate 53 is connected to one side of the movable plate 52 and moves along the X-axis direction with the movable plate 52;

[0069] Two X-axis sliding rods 54 are movably connected in the movable holes opened on the X-axis clamping plate 53 , and one end of the two X-axis sliding rods 54 is fixedly connected to the X-axis clamping block 55 for clamping the valve seat 4 .

[0070] The X-axis clamping mechanism 5 also includes:

[0071] Two first springs 56 are connected to the other end of the X-axis slide bar 54 and to the inner wall of the movable hole, and are used to push the X-axis slide bar 54 and the X-axis clamping block 55 to move and initially clamp the valve seat 4.

[0072] Working principle: When processing the ultra-low temperature ball valve seat, the ultra-low temperature ball valve seat is directly placed on the valve seat fixing platform 3, and the grinding equipment is adjusted to a suitable height through the lifting platform 2. At the same time, the valve seat fixing platform 3 is rotated on the workbench 1 to realize the inner side grinding of the ultra-low temperature ball valve seat. In order to quickly and stably fix the ultra-low temperature ball valve seat and improve the grinding accuracy, after the ultra-low temperature ball valve seat is placed on the valve seat fixing platform 3, the bottom of the valve seat 4 will first contact the two X-axis clamping blocks 55, and then continue to press downward, using its bottom to contact the inclined part of the two X-axis clamping blocks 55, under the action of the two first springs 56, using the two X The axis clamping block 55 performs preliminary clamping on the sealing groove of the outer wall of the valve seat 4, and then the handwheels of the two threaded rods 51 are rotated at the same time, and then the two threaded rods 51 are driven to rotate. Since the threads on both sides of the threaded rods 51 are opposite, the movable plates 52 on both sides will be pushed to move towards and away from each other. When the movable plates 52 approach each other, they will push the X-axis clamping plate 53 to move, thereby continuing to push the movable plate 52. The X-axis clamping block 55 and the X-axis sliding rod 54 will compress the first spring 56 until the X-axis clamping plate 53 and the X-axis clamping block 55 are in contact, achieving rigid contact, thereby playing a role in stably clamping the valve seat 4 in the X-axis direction.

[0073] See also Figure 1-8 Based on the above embodiment, in another embodiment of the present invention, each Y-axis clamping mechanism 6 includes:

[0074] The Y-axis clamping plate 61 is arranged inside the valve seat fixing platform 3 and is used to clamp the valve seat 4 along the Y-axis direction. The interior of the Y-axis clamping plate 61 is hollow and has a mounting groove. A push block 62 is installed in the mounting groove and is used to push the Y-axis clamping plate 61 to move along the Y-axis direction.

[0075] Two sliders 69 are fixedly connected to the top of the Y-axis clamping plate 61 and slidably connected to the top of the inner wall of the valve seat fixing platform 3;

[0076] Two Y-axis slide bars 63, one end of each of which movably passes through the Y-axis clamping plate 61 and is connected to the push block 62, for pushing the push block 62 to move, and the other ends of the two Y-axis slide bars 63 are connected to a connecting block;

[0077] The fixing block 65 is fixedly connected to the top of the inner wall of the valve seat fixing platform 3, and one side of the fixing block 65 is rotatably connected to the adjusting screw 64 through a bearing. One end of the adjusting screw 64 is threadedly connected to the connecting block, and is used to adjust the movement of the connecting block and the two Y-axis slide bars 63;

[0078] The other ends of the two Y-axis slide rods 63 moveably penetrate the fixed block 65 and are connected to the threaded rod 51 through a bevel gear set 66, so that the threaded rod 51 synchronously drives the adjusting screw 64 to rotate, thereby adjusting the movement of the Y-axis slide rod 63, the push block 62 and the Y-axis clamping plate 61.

[0079] The Y-axis clamping mechanism 6 also includes:

[0080] An elastic pad 67, movably connected in the Y-axis clamping plate 61, for elastically contacting the valve seat 4;

[0081] The push rod 68 has two ends connected to the elastic pad 67 and the push block 62 respectively. The push block 62 is arc-shaped and elastically installed in the Y-axis clamping plate 61 to generate deformation to push the elastic pad 67 to move and contact closely with the valve seat 4.

[0082] Working principle: when the threaded rod 51 is rotated, the adjusting screw 64 will be synchronously driven to rotate through the bevel gear set 66, and then the position of the Y-axis slide rod 63 will be changed through the adjusting screw 64. The change in its position will push the push block 62 and the Y-axis clamping plate 61 to move, so that they contact the outer wall of the valve seat to clamp the valve seat. At the same time, when the threaded rod 51 continues to rotate and the X-axis slide rod 54 moves inward, the Y-axis slide rod 63 will push the push block 62 to deform, and its arc shape will change. At this time, the elastic pad 67 will be pushed by the push rod 68 to contact the valve seat 4, thereby achieving elastic contact with the valve seat 4, while increasing the friction with the valve seat 4, improving the clamping stability, and can clamp the valve seat without a sealing groove at the bottom to adapt to different types of valve seats for clamping.

[0083] See also Figure 1-8 , based on the above embodiment, in another embodiment of the present invention, an internal clamping mechanism 7 is provided inside the valve seat fixing platform 3 for clamping the inner ring of the valve seat 4;

[0084] The internal clamping mechanism 7 comprises:

[0085] The connecting plate 73 is fixedly connected to the bottom of the inner wall of the valve seat fixing platform 3 through a connecting rod;

[0086] The adjusting disk 71 is rotatably connected to the outer wall of the connecting rod, and a snail-shaped movable hole is opened on the adjusting disk 71;

[0087] Four limiting rods 72 are equally disposed in the volute-shaped movable hole, and the outer wall of the limiting rod 72 is rotatably connected to a guide wheel and is slidably connected in the volute-shaped movable hole;

[0088] The outer wall of the connecting plate 73 is connected to four fixing rods 74, and the outer wall of each fixing rod 74 is slidably connected to a sliding sleeve 75, the bottom of the sliding sleeve 75 is connected to the top of the limiting rod 72, and the end of the sliding sleeve 75 is used to clamp the inner ring of the valve seat 4;

[0089] The worm 76 is rotatably connected to the inner wall of the valve seat fixing platform 3 at both ends through bearings. The left side movably penetrates the valve seat fixing platform 3 and extends outward. The outer wall of the adjustment disk 71 is provided with a worm gear groove, which is engaged with the worm 76 to drive the adjustment disk 71 to rotate.

[0090] Working principle: by rotating the handwheel of the worm 76 and utilizing the self-locking characteristics of the worm 76 and the worm wheel, the adjusting disk 71 is driven to rotate, and then rotates through the volute movable hole opened thereon, thereby driving the four limit rods 72 on its inner wall to change position, thereby synchronously pushing the four sliding sleeves 75 to move outward along the fixing rod 74, thereby fixing the inner ring of the valve seat 4, and forming a self-locking after fixing, and unable to rotate and loosen. At the same time, its center position can be determined, and it can be clamped and fixed from the inside to prevent the valve seat from moving, thereby improving stability during grinding.

[0091] See also Figure 1-8 On the basis of the above embodiment, in another embodiment of the present invention, a mounting cavity is provided on the top of the valve seat fixing platform 3, and a pop-up mechanism 8 is provided in the mounting cavity for popping out the valve seat 4;

[0092] The ejection mechanism 8 comprises:

[0093] The discharge tray 83 is movably connected to the middle of the valve seat fixing platform 3 and is used to place the valve seat 4;

[0094] Four wedge blocks 86 are equally installed in the movable grooves provided on the installation cavity, and are used to push the discharge tray 83 to move upward;

[0095] One end of the four movable rods 87 is connected to the wedge blocks 86 respectively, and the other end is movably connected in the movable groove. The outer wall of each movable rod 87 is also installed with a second spring 88 for pushing the wedge blocks 86 to move toward the discharge tray 83.

[0096] The ejection mechanism 8 also includes:

[0097] Two plug plates 81, one end of which is respectively inserted into the discharge tray 83, and the other end of which movably penetrates the valve seat fixing platform 3 and extends outward, are used to limit the upward movement of the discharge tray 83. A slot is provided on the discharge tray 83, and one end of the plug plate 81 is inclined and fits with the inclined surface in the slot;

[0098] L-shaped movable plates 82 are fixedly connected to both sides of the plug plate 81, and the L-shaped movable plates 82 are slidably connected in the installation cavity. The L-shaped movable plates 82 on the left and right sides are staggered up and down, and tooth grooves are respectively opened on the opposite sides.

[0099] The gear 85 is installed in the installation cavity and meshes with the tooth grooves of the left and right L-shaped movable plates 82 respectively, so as to drive the L-shaped movable plates 82 on both sides to move synchronously.

[0100] An elastic plate 84 is installed in the installation cavity. Four elastic plates 84 are provided and are installed on both sides of the two plug plates 81 respectively. The elastic plates 84 fit the L-shaped movable plate 82 to push the L-shaped movable plate 82 to move toward the middle.

[0101] Working principle: When processing ball valve seats 4 of different sizes, first place the connected discharge tray 83 on the valve seat fixing platform 3, and then place the valve seat 4 directly on the discharge tray 83, and then press downward to squeeze the four wedge blocks 86 to shrink inward, and at the same time, the bottom of the valve seat 4 contacts the inclined part of the two X-axis clamping blocks 55. Under the action of the two first springs 56, the two X-axis clamping blocks 55 are used to achieve preliminary clamping of the sealing groove of the outer wall of the valve seat 4. At the same time, after the valve seat 4 is clamped, it is initially fixed; then, through the action of the elastic plate 84, the two plug plates 81 are pushed to be plugged into the discharge tray 83 for fixation, and after the processing is completed, they are released respectively. The X-axis, Y-axis and internal valve seat are fixed, and then the plug plate 81 on one side is pulled to move, and then the L-shaped movable plate 82 is driven to move synchronously, and the L-shaped movable plate 82 on the other side is pushed to move by the meshing effect of the gear 85, and the plug plate 81 on the other side is pushed to move synchronously, and at the same time, the restriction on the discharge tray 83 is released. Since one side of the plug plate 81 and the slot are wedge-shaped, inclined and fitted, the wedge block 86 is pushed to move under the reset of the second spring 88 to slowly squeeze the discharge tray 83 upward, thereby realizing stable discharge of the valve seat 4 without directly bouncing up, avoiding the valve seat 4 that tends to be polished from being hit and affecting its accuracy.

[0102] See also Figure 1-8 Based on the above embodiment, in another embodiment of the present invention, the ejection mechanism 8 further includes:

[0103] The wedge-shaped push rod 89 is slidably connected in the slide groove of the valve seat fixing platform 3 and is connected to the L-shaped movable plate 82;

[0104] An L-shaped push plate 810 is slidably connected to the valve seat fixing platform 3 and has a wedge-shaped configuration on one side, and is used to push the valve seat 4 to move upward and separate from the discharge tray 83;

[0105] The third spring 811 has one end connected to a round rod and is connected to the slide groove through the round rod. The other end of the round rod and the third spring 811 are movably connected in the circular hole opened in the L-shaped push plate 810, which is used to push the L-shaped push plate 810 toward the valve seat 4 to separate the material tray 83 and the valve seat 4.

[0106] Working principle: when it is necessary to discharge the material, you only need to pull the plug plate 81, which will drive the wedge-shaped push rod 89 to move. At this time, the inclined part of the wedge-shaped push rod reduces the force on the L-shaped push plate 810, and under the action of the third spring 811, it is pushed closer to the valve seat 4, and then the plug plate 81 is continuously pulled until the discharge tray 83 is first separated upward, and the L-shaped push plate 810 will contact the valve seat 4 and squeeze it, and continue to push the valve seat 4 upward through its wedge-shaped part, thereby separating the valve seat 4 and the discharge tray 83, and then facilitating the removal of the valve seat 4 for discharge.

[0107] The present invention provides a cryogenic ball valve seat machining device. There are many methods and ways to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A cryogenic ball valve seat machining device, comprising a workbench (1), the top of the workbench (1) being rotatably connected to a valve seat fixing platform (3), a valve seat (4) being placed on the valve seat fixing platform (3), the valve seat fixing platform (3) being used to fix the valve seat (4), a lifting platform (2) being installed on the top of the workbench (1) for installing a grinding device; characterized in that: Also includes: Two X-axis clamping mechanisms (5) are provided and are symmetrically arranged inside the valve seat fixing platform (3) along the X-axis direction, and are used to clamp the valve seat (4) along the X-axis direction; Two Y-axis clamping mechanisms (6) are provided and are symmetrically arranged inside the valve seat fixing platform (3) along the Y-axis direction, and are used to clamp the valve seat (4) along the Y-axis direction; Wherein, each of the X-axis clamping mechanisms (5) comprises: The threaded rod (51) has two ends rotatably connected to the inner wall of the valve seat fixing platform (3) through bearings, and the left side thereof movably penetrates the valve seat fixing platform (3) and extends outwardly to be connected to an adjusting knob for rotating the threaded rod (51); The movable plate (52) is threadedly connected to the outer wall of the threaded rod (51) and is in contact with the top of the inner wall of the valve seat fixing platform (3). The threaded rod (51) is rotated to drive the movable plate (52) to move. An X-axis clamping plate (53) is connected to one side of the movable plate (52) and moves along the X-axis direction following the movable plate (52); Two X-axis sliding rods (54) are movably connected to the movable holes provided on the X-axis clamping plate (53), and one end of each of the two X-axis sliding rods is fixedly connected to an X-axis clamping block (55) for clamping the valve seat (4); The top of the valve seat fixing platform (3) is provided with a mounting cavity, and a pop-up mechanism (8) is arranged in the mounting cavity for popping out the valve seat (4); The ejection mechanism (8) comprises: A discharge tray (83) movably connected to the middle of the valve seat fixing platform (3) and used for placing the valve seat (4); Four wedge-shaped blocks (86) are equally mounted in movable grooves provided on the mounting cavity, and are used to push the discharge tray (83) to move upward; Four movable rods (87), one end of which is respectively connected to the wedge block (86), and the other end of which is movably connected in the movable groove, and the outer wall of each movable rod (87) is also installed with a second spring (88) for pushing the wedge block (86) to move toward the discharge tray (83); The ejection mechanism (8) further comprises: Two plug plates (81), one end of which is respectively inserted into the discharge tray (83), and the other end of which movably penetrates the valve seat fixing platform (3) and extends outward, and is used to limit the upward movement of the discharge tray (83); a slot is provided on the discharge tray (83), and one end of the plug plate (81) is inclined and fits with the inclined surface in the slot; L-shaped movable plates (82) are fixedly connected to both sides of the plug plate (81), and the L-shaped movable plates (82) are slidably connected in the installation cavity. The L-shaped movable plates (82) on the left and right sides are arranged in an up-and-down staggered manner, and tooth grooves are respectively provided on opposite sides thereof; The gear (85) is installed in the installation cavity and meshes with the tooth grooves of the L-shaped movable plates (82) on the left and right sides respectively, so as to drive the L-shaped movable plates (82) on both sides to move synchronously; An elastic plate (84) is installed in the installation cavity. Four elastic plates (84) are provided and are respectively installed on both sides of the two plug plates (81). The elastic plates (84) are fitted with the L-shaped movable plate (82) and are used to push the L-shaped movable plate (82) to move toward the middle.

2. The ultra-low temperature ball valve seat machining device according to claim 1, characterized in that: The X-axis clamping mechanism (5) further comprises: Two first springs (56) are connected to the other end of the X-axis slide bar (54) and are connected to the inner wall of the movable hole, and are used to push the X-axis slide bar (54) and the X-axis clamping block (55) to move and initially clamp the valve seat (4).

3. The ultra-low temperature ball valve seat machining device according to claim 2, characterized in that: Each of the Y-axis clamping mechanisms (6) comprises: A Y-axis clamping plate (61) is arranged inside the valve seat fixing platform (3) and is used to clamp the valve seat (4) along the Y-axis direction. The interior of the Y-axis clamping plate (61) is hollow and has a mounting groove. A push block (62) is installed in the mounting groove and is used to push the Y-axis clamping plate (61) to move along the Y-axis direction. Two sliding blocks (69) are fixedly connected to the top of the Y-axis clamping plate (61) and slidably connected to the top of the inner wall of the valve seat fixing platform (3); Two Y-axis slide bars (63), one end of each of which movably passes through the Y-axis clamping plate (61) and is connected to the push block (62), and is used to push the push block (62) to move, and the other ends of the two Y-axis slide bars (63) are connected to a connecting block; A fixed block (65) is fixedly connected to the top of the inner wall of the valve seat fixing platform (3), one side of which is rotatably connected to an adjusting screw (64) via a bearing, one end of the adjusting screw (64) is threadedly connected to the connecting block, and is used to adjust the movement of the connecting block and the two Y-axis slide bars (63); The other ends of the two Y-axis slide bars (63) movably penetrate the fixed block (65) and are transmission-connected to the threaded rod (51) through a bevel gear set (66), so that the threaded rod (51) synchronously drives the adjusting screw rod (64) to rotate, thereby adjusting the movement of the Y-axis slide bar (63), the push block (62) and the Y-axis clamping plate (61).

4. The ultra-low temperature ball valve seat machining device according to claim 3, characterized in that: The Y-axis clamping mechanism (6) further comprises: An elastic pad (67) movably connected in the Y-axis clamping plate (61) and used for elastically contacting the valve seat (4); The push rod (68) has two ends respectively connected to the elastic pad (67) and the push block (62); the push block (62) is arc-shaped and elastically mounted in the Y-axis clamping plate (61) and is used to generate deformation to push the elastic pad (67) to move and closely contact the valve seat (4).

5. The ultra-low temperature ball valve seat machining device according to claim 4, characterized in that: An internal clamping mechanism (7) is provided inside the valve seat fixing platform (3) for clamping the inner ring of the valve seat (4); The internal clamping mechanism (7) comprises: A connecting plate (73) is fixedly connected to the bottom of the inner wall of the valve seat fixing platform (3) via a connecting rod; An adjusting disk (71) is rotatably connected to the outer wall of the connecting rod, and a snail-shaped movable hole is formed on the adjusting disk (71); Four limiting rods (72) are equally spaced in the volute-shaped movable hole, and the outer wall of the limiting rod (72) is rotatably connected to a guide wheel and is slidably connected in the volute-shaped movable hole; The outer wall of the connecting plate (73) is connected to four fixing rods (74), the outer wall of each fixing rod (74) is slidably connected to a sliding sleeve (75), the bottom of the sliding sleeve (75) is connected to the top of the limiting rod (72), and the end of the sliding sleeve (75) is used to clamp the inner ring of the valve seat (4); The worm (76) has two ends rotatably connected to the inner wall of the valve seat fixing platform (3) through bearings, and the left side movably penetrates the valve seat fixing platform (3) and extends outward. The outer wall of the adjustment disk (71) is provided with a worm wheel groove, which meshes with the worm (76) and is used to drive the adjustment disk (71) to rotate.

6. The ultra-low temperature ball valve seat machining device according to claim 1, characterized in that: The ejection mechanism (8) further comprises: A wedge-shaped push rod (89) is slidably connected in a slide groove of the valve seat fixing platform (3) and is connected to the L-shaped movable plate (82); An L-shaped push plate (810) is slidably connected in the valve seat fixing platform (3) and has a wedge-shaped arrangement on one side for pushing the valve seat (4) to move upward and separate from the discharge tray (83); The third spring (811) has one end connected to a round rod and is connected to the slide groove through the round rod. The other end of the round rod and the third spring (811) are movably connected in a circular hole opened in the L-shaped push plate (810) and are used to push the L-shaped push plate (810) toward the valve seat (4) to separate the material tray (83) and the valve seat (4).

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