High-performance compensation type shear valve

Abstract

The invention belongs to the technical field of industrial valves, particularly relates to a high-performance compensation type shear valve, and aims to solve the problem that high-pressure fluid possibly flows out of a gap to cause distortion of a valve core due to the fact that the pressure value of one side in a valve body is increased. A liquid inlet end cover is fixed to the position, close to an opening of the first cavity, of the main valve body through a bolt, a second cavity is reserved in the side, close to the first cavity, of the liquid inlet end cover, and a first liquid inlet hole and a second liquid outlet hole which horizontally extend and pass through the sphere center of the spherical cavity are reserved in the sides, opposite to each other, of the main valve body and the liquid inlet end cover correspondingly. During use, when the valve is closed, if predictable pressure needs to be increased, only a sliding abutting rod needs to be controlled to move downwards so as to push a top ball downwards, and at the moment, the top ball can tightly extrude an abutting rib plate and a hemispherical shell top core at a hole opening of a first liquid inlet hole under the action of an inclined face of a locking compensation abutting block; therefore, fluid overflow caused by further expansion of the gap is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of industrial valves, and in particular to a high-performance compensating shear valve. Background Art

[0002] Compensated shear valve is a specially designed shear valve that is mainly used to accurately control fluid flow and can automatically compensate for the effects of changes in fluid characteristics (such as pressure, temperature or flow rate changes) under different working conditions. This valve is usually used in high-demand industrial applications to maintain stable performance and ensure that the system can still achieve the predetermined control target under various working conditions.

[0003] After searching, it is found that when the shear valve in the prior art encounters a sudden increase in pressure after closing, that is, the pressure value inside the valve body increases, the fluid that is controlled to be closed will expand the gap between the valve core and the valve body and overflow. If no compensation control is performed, once the gap is expanded, more and more will flow, and the gap will be expanded larger and larger, resulting in the inability to close the valve tightly at the later stage, and the stains on the surface of the valve core will not be scrapped thoroughly, which will lead to a series of problems and eventually the valve body will be scrapped. In order to solve the problem that the pressure value on one side of the valve body may increase, which may cause high-pressure fluid to flow out of the gap and cause the valve core to twist, we propose a new shear valve with a pressure compensation mechanism. Summary of the invention

[0004] In order to solve the technical problem that the pressure value on one side of the valve body increases, which may cause the high-pressure fluid to flow out of the gap and cause the valve core to twist, the present invention adopts the following technical solution: A high-performance compensating shear valve comprises a main valve body with a cavity 1 therein, a liquid inlet end cover is fixed by bolts at the opening of the main valve body near the cavity 1, a cavity 2 is reserved on the side of the liquid inlet end cover near the cavity 1, and a liquid inlet hole 1 and a liquid outlet hole 2 which extend horizontally and pass through the center of the spherical chamber are reserved on the opposite sides of the main valve body and the liquid inlet end cover; a shaft neck tube which extends vertically upward is reserved at the top of the outer wall of the main valve body, and a support platform is reserved at the top of the shaft neck tube; a plurality of mutually parallel connecting rods are fixed at the top of the supporting platform, and a mounting base is arranged at the top of the connecting rods; the upper surface of the mounting base is divided into A driving mechanism and an outer cover module are separately provided; a valve stem module is provided in the shaft neck tube, and the valve stem module includes a main transmission tube rotatably connected in the shaft neck tube, and a hemispherical shell top core with a melon-shaped structure is fixed at the bottom end of the main transmission tube; and a tightening rib plate extending toward the center of the ball is fixed on the inner arc side of the hemispherical shell top core; the internal sealing sliding connection of the main transmission tube is provided with a sliding rod, and a dense spring is fixed at the bottom end of the sliding rod, and a top ball is fixed at the bottom end of the dense spring; a locking compensation block extending toward the middle is fixed on the inner wall of the cavity one near the second liquid outlet hole, and an inclined surface is reserved on the side of the locking compensation block close to the top ball.

[0005] A further arrangement is that a T-shaped groove is opened on the top inner wall of the second liquid outlet hole, and anti-slip wing plates are reserved on both sides of the locking and compensating block, and the locking and compensating block and the two anti-slip wing plates are slidably inserted in the T-shaped groove at the same time; a limit block is welded and fixed to the end of the T-shaped groove away from the liquid inlet end cover, and a self-locking screw hole is opened in the middle of the limit block, and a jacking bolt is screwed in the self-locking screw hole; through the provision of the T-shaped groove and the jacking bolt, not only the installation of the locking and compensating block can be made more convenient, but the compensation amplitude can also be controlled by controlling the advancement distance of the jacking bolt.

[0006] A further arrangement is that the main valve body, the liquid inlet end cover and the components inside thereof constitute a valve body module, and flanges are reserved at the ends of the main valve body and the liquid inlet end cover that are away from each other, at the openings of the liquid outlet hole 2 and the liquid inlet hole 1, and grooves are reserved on the opposite sides of the two flanges near the bottom ends; L-shaped mounting plates are fixed in the two grooves by bolts; this not only fixes the overall device after later installation to prevent the main valve body and the liquid inlet end cover from generating radial offset pulling force, but also ensures that the flange port surfaces are flush.

[0007] A further configuration is that a vertical arc groove is reserved on the side of the clamping rib plate close to the top ball, and the axis line of the arc groove is parallel to the axis line of the sliding rod; by setting the clamping rib plate with the arc groove, the top ball can be prevented from slipping when subjected to force, ensuring that it is always in the middle position of the top core of the hemispherical shell.

[0008] A further configuration is that the cross-section of the dense spring is rectangular, and a stud is sleeved on the top end of the dense spring, and a screw hole matched with the stud is reserved at the bottom end of the sliding rod; a rubber ring is sleeved on the circumferential outer wall of the sliding rod near the bottom end, and a cylindrical expansion hole matched with the outer diameter of the rubber ring is reserved on the circumferential inner wall of the main transmission pipe near the bottom end, and the inner wall of the cylindrical expansion hole is polished; by setting a dense spring with a rectangular cross-section, the axial pressure from the sliding rod can be transmitted with maximum efficiency, and the setting of the rubber ring can improve the sealing effect of the device.

[0009] A further configuration is that a stepped groove is machined on one end of the circumferential inner wall of the liquid inlet hole 1 close to the cavity 2, and a matching sliding abutment tube is slidably connected in the stepped groove, and a concave surface matching the spherical size of the top core of the hemispherical shell is reserved at the opening of one end of the matching sliding abutment tube close to the main valve body; the stepped groove includes two mutually parallel and vertical annular planes, and a plurality of spring storage holes symmetrically distributed in the center are opened on the annular plane away from the top core of the hemispherical shell, and a clamping spring 1 is arranged in each spring storage hole; the same wear-resistant abutment ring is fixed to the end of the plurality of clamping springs 1 away from the bottom of the hole, and the same flexible graphite ring is arranged between the wear-resistant abutment ring and the circumferential outer wall of the matching sliding abutment tube; the aperture of the circumferential inner wall of the matching sliding abutment tube is the same as the aperture of the liquid inlet hole 1.

[0010] A further arrangement is that a positioning groove is opened on the inner wall of cavity 1 of the main valve body just below the sliding lever, and an anti-dropout top shaft is slidably connected in the groove of the positioning groove, and a compression spring is fixed between the bottom end of the anti-dropout top shaft and the bottom of the groove; the axis line of the anti-dropout top shaft coincides with the axis line of the main transmission tube, and a limiting hole that matches the diameter and shape of the top end of the anti-dropout top shaft is opened on the side of the spherical surface of the top core of the hemispherical shell away from the main transmission tube, and the top end of the anti-dropout top shaft is rounded.

[0011] A further arrangement is that the wall thickness of cavity one is smaller than that of cavity two, and a scraper strip mounting groove is provided on the spherical inner wall of cavity one near the liquid inlet end cover, in which an arc-shaped scraper strip is embedded, and the upper and lower ends of the arc-shaped scraper strip have a span greater than the maximum opening diameter of the matching sliding tube; the spherical surface of the top core of the hemispherical shell can be additionally scraped to remove the stubbornly attached substances on its surface and reduce friction loss, and an annular groove one is provided on the vertical plane on the opposite side of the main valve body and the liquid inlet end cover, and a common sealing ring is provided between the two annular grooves one when they are combined.

[0012] A further configuration is that two annular grooves are reserved on the circumferential inner wall of the shaft neck tube near the upper and lower ends, and symmetrical H-shaped sealing rings are respectively clamped in the two annular grooves; an annular sealing pad support is reserved on the circumferential outer wall of the main transmission tube near the bottom end, and the cross-sectional shape of the annular sealing pad support is adapted to the H-shaped sealing ring; an internal threaded tightener is screwed on the circumferential outer wall of the main transmission tube near the top end of the support platform; a through hole is opened at the bottom of the annular groove two near the top end, which penetrates the annular groove two below, and a clamping spring two and a T-shaped push rod fixed at both ends are slidably placed in the through hole.

[0013] A further arrangement is that a bearing seat is fixed to the top of the connecting rod, and a bearing is fixed in the middle of the bearing seat, and the mounting seat is fixedly sleeved on the top of the bearing seat; the outer cover module includes a C-shaped card cover fixed to the middle part of the mounting card cover near the rear side, and an electric control positioning pin is fixed to the top of the C-shaped card cover, and the end of the electric control positioning pin extension rod is fixed to the top of the sliding rod through a coupling; a front side guard plate is fixed in front of the C-shaped card cover, and semi-cylindrical support plates are reserved on both sides of the mounting card seat, and outer cover one and outer cover two are sleeved and fixed on the two semi-cylindrical support plates respectively; the driving mechanism includes a fan-shaped worm gear sleeved and fixed on the outer wall of the circumference of the main transmission pipe near the top, and the central angle of the fan-shaped worm gear is between 90° and 110°; mutually adaptable shaft rod seats are respectively fixed on the two semi-cylindrical support plates of the mounting card seat, and long shaft rods and short shafts that are parallel to each other and of the same height are respectively rotatably connected to the two shaft rod seats. 1. A worm sleeve and a driving pulley are fixed at both ends of the long shaft rod, and the worm sleeve and the fan-shaped worm wheel are meshed with each other; a driven pulley is sleeved and fixed on the circumferential outer wall of the short shaft 1, and the same toothed belt is wound between the circumferential outer walls of the driving pulley and the driven pulley; the rotation of the fan-shaped worm wheel can be realized by controlling the horizontal reciprocating movement of one section of the toothed belt, thereby driving the rotation of the top core of the hemispherical shell; a piston cylinder is fixed on the inner wall of the outer cover 1, and the piston cylinder is a cylindrical structure with a cavity inside as a whole, and a piston push plate is slidably connected to the inside of the piston cylinder, and an extended reciprocating push column is fixed on the side of the piston push plate close to the toothed belt, and the end of the reciprocating push column is fixed on the upper surface of the toothed belt; an oil inlet pipe 1 and an oil inlet pipe 2 are respectively connected at both ends of the piston cylinder; the reciprocating push column can be advanced and retreated by alternately squeezing high-pressure hydraulic oil into the oil inlet pipe 1 and the oil inlet pipe 2.

[0014] The beneficial effects of the present invention are: 1. By setting the top ball and locking compensation block at the bottom of the sliding rod, when the valve is closed, if the foreseeable pressure is going to increase, it is only necessary to control the sliding rod to move downward to push the top ball downward. At this time, the top ball can squeeze the locking rib plate and the top core of the hemispherical shell tightly at the orifice of the liquid inlet hole 1 under the action of the inclined surface of the locking compensation block, thereby preventing the gap from further expanding and causing fluid overflow.

[0015] 2. Through the setting of the tightening spring and the wear-resistant retaining ring, the matching sliding retaining tube can be tightly attached to the spherical surface of the top core of the hemispherical shell. Even if slight wear occurs or the tightness of the fit changes due to thermal expansion and contraction, displacement compensation can be carried out in time to ensure the normal use of the valve.

[0016] 3. The anti-dropping top shaft can prevent the top core of the hemispherical shell from generating axial eccentricity when rotating or receiving an unbalanced thrust from one side, which may cause the valve to fail to close tightly.

[0017] 4. By arranging the T-shaped push rods at both ends of the tightening spring, the two H-shaped sealing rings can be tightly pressed against the annular sealing pad support and the lower surface of the internal thread tightener, thereby improving the sealing effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a side view of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of the cross-sectional structure along line AA; Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at B in the middle; Figure 5 It is the front view of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of the cross-sectional structure along the CC line; Figure 7 It is a schematic diagram of the explosion structure of the outer cover module in the present invention; Figure 8 It is a schematic diagram of the overall structure of the driving mechanism in the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the valve body in the present invention; Fig.10 It is a schematic diagram of the vertical cross-section of the three-dimensional structure of the valve body in the present invention; Fig.11 For the present invention Fig.10 Schematic diagram of the enlarged structure at K in the middle; Fig.12 This is a schematic diagram of the exploded structure of the sealing structure inside the liquid inlet end cover of the present invention; Fig.13 It is a schematic diagram of the assembly structure of the locking compensation block of the present invention.

[0019] In the figure: 1. main valve body; 101. positioning sink groove; 102. T-shaped slide groove; 103. scraper installation groove; 2. shaft neck tube; 3. support platform; 4. internal thread tightener; 5. installation seat; 501. C-shaped card cover; 502. front side guard plate; 6. outer cover 1; 7. connecting rod; 8. oil inlet pipe 1; 9. electric control positioning pin; 901. sliding rod; 902. dense spring; 903. top ball; 10. outer cover 2; 11. embedded groove; 12. mounting plate; 13. liquid inlet end cover; 131. ladder card groove; 132. spring bin hole; 14. valve stem module; 141. hemispherical shell top core; 142. Main transmission pipe; 143, annular sealing pad support; 144, tightening rib plate; 15, driving mechanism; 151, piston cylinder; 152, oil inlet pipe II; 153, reciprocating top column; 154, fan-shaped worm gear; 155, shaft seat; 156, toothed transmission belt; 157, driven pulley; 16, matching sliding butt pipe; 17, ordinary sealing ring; 18, anti-dropping top shaft; 19, locking compensation butt block; 191, limit stopper; 20, flexible graphite ring; 21, tightening spring I; 22, wear-resistant butt ring; 23, arc scraper strip; 24, T-shaped push rod; 25, h-shaped sealing ring; 26, tightening spring II. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0021] In this embodiment, refer to Figure 1-13, a high-performance compensated shear valve, comprising a main valve body 1 with a cavity 1 therein, a liquid inlet end cover 13 is fixed by bolts at the opening of the main valve body 1 near the cavity 1, a cavity 2 is reserved on the side of the liquid inlet end cover 13 near the cavity 1, the cavity 1 and the cavity 2 are combined into a same concentric spherical chamber, and the center of the spherical chamber is located in the main valve body 1, and a liquid inlet hole 1 and a liquid outlet hole 2 are reserved on the opposite sides of the main valve body 1 and the liquid inlet end cover 13, which extend horizontally and pass through the center of the spherical chamber; the main The top of the outer wall of the valve body 1 is reserved with a shaft neck tube 2 extending vertically upward, and the top of the shaft neck tube 2 is reserved with a support platform 3 of an annular structure; a plurality of mutually parallel connecting rods 7 are fixed to the top of the support platform 3, and a mounting base 5 is provided at the top of the connecting rod 7; a driving mechanism 15 and an outer cover module are respectively provided on the upper surface of the mounting base 5; a valve stem module 14 is provided in the shaft neck tube 2, and the valve stem module 14 includes a main transmission tube 142 rotatably connected to the shaft neck tube 2, and the main transmission tube 1 The bottom end of the hemispherical shell 141 is fixed with a 1 / 3 melon peel structure after three vertical cuts; and the inner arc side of the hemispherical shell top core 141 is fixed with a tightening rib plate 144 extending toward the center of the ball; the internal sealing sliding connection of the main transmission tube 142 is connected with a sliding rod 901, and the bottom end of the sliding rod 901 is fixed with a dense spring 902, and the bottom end of the dense spring 902 is fixed with a top ball 903; the inner wall of the cavity 1 is fixed with a locking compensation block extending toward the middle near the second liquid outlet hole 19, and the locking compensation block 19 is provided with an inclined surface on one side close to the top ball 903; when the valve is closed, if the foreseeable pressure is about to increase, it is only necessary to control the sliding rod 901 to move downward to push the top ball 903 downward. At this time, the top ball 903 can be tightly squeezed against the locking rib plate 144 and the top core 141 of the hemispherical shell at the opening of the liquid inlet hole 1 under the action of the inclined surface of the locking compensation block 19, thereby preventing the gap from further expanding and causing the fluid to overflow.

[0022] Reference Figure 3 , Fig. 9 and Fig.13 A T-shaped groove 102 is provided on the inner wall of the top of the second liquid outlet hole, and anti-slip wing plates are reserved on both sides of the locking and compensating block 19, and the locking and compensating block 19 and the two anti-slip wing plates are slidably inserted into the T-shaped groove 102 at the same time; a limit stopper 191 is welded and fixed to the end of the T-shaped groove 102 away from the liquid inlet end cover 13, and a self-locking screw hole is provided in the middle of the limit stopper 191, and a jacking bolt is screwed into the self-locking screw hole; through the provision of the T-shaped groove 102 and the jacking bolt, not only can the installation of the locking and compensating block 19 be made more convenient, but the compensation amplitude can also be controlled by controlling the advancement distance of the jacking bolt.

[0023] Reference Figure 1-Figure 3The main valve body 1, the liquid inlet end cover 13 and the components inside them constitute a valve body module, and flanges are reserved at the ends of the main valve body 1 and the liquid inlet end cover 13 that are away from each other, and the orifices of the liquid outlet hole 2 and the liquid inlet hole 1, and grooves 11 are reserved near the bottom ends on the opposite sides of the two flanges; L-shaped mounting plates 12 are fixed in the two grooves 11 by bolts; not only can it fix the overall device after later installation to prevent the main valve body 1 and the liquid inlet end cover 13 from generating radial offset tension, but it also ensures that the flange port surfaces are flush.

[0024] Reference Figure 8 and Fig.10 A vertical arc groove is reserved on the side of the clamping rib 144 close to the top ball 903, and the axis line of the arc groove is parallel to the axis line of the sliding rod 901; by setting the clamping rib 144 with an arc groove, the top ball 903 can be prevented from slipping when subjected to force, ensuring that it is always in the middle position of the top core 141 of the hemispherical shell.

[0025] In the present invention, the cross-section of the dense spring 902 is rectangular, and a stud is sleeved on the top end of the dense spring 902, and a screw hole matched with the stud is reserved at the bottom end of the sliding push rod 901; a rubber ring is sleeved on the circumferential outer wall of the sliding push rod 901 near the bottom end, and a cylindrical expansion hole matched with the outer diameter of the rubber ring is reserved near the bottom end of the circumferential inner wall of the main transmission tube 142, and the inner wall of the cylindrical expansion hole is polished; by setting the dense spring 902 with a rectangular cross-section, the axial pressure from the sliding push rod 901 can be transmitted with maximum efficiency, and the setting of the rubber ring can improve the sealing effect of the device.

[0026] Reference Figure 3-Figure 4 , Fig.12 A stepped groove 131 is machined on the circumferential inner wall of the liquid inlet hole 1 near one end of the cavity 2, and a matching sliding abutment tube 16 is slidably connected in the stepped groove 131, and a concave surface matching the spherical size of the hemispherical shell top core 141 is reserved at the opening of the matching sliding abutment tube 16 near one end of the main valve body 1; the stepped groove 131 includes two mutually parallel and vertical annular planes, and a plurality of spring slot holes 132 symmetrically distributed in the center are opened on the annular plane away from the hemispherical shell top core 141, and a tightening spring 21 is arranged in each of the spring slot holes 132; a plurality of tightening springs A wear-resistant butt ring 22 is fixed to the end of the spring 21 away from the bottom of the hole, and a flexible graphite ring 20 is arranged between the wear-resistant butt ring 22 and the circumferential outer wall of the matching sliding butt tube 16; the circumferential inner wall aperture of the matching sliding butt tube 16 is the same as the aperture of the liquid inlet hole 1; through the setting of the tightening spring 21 and the wear-resistant butt ring 22, the matching sliding butt tube 16 can be tightly attached to the spherical surface of the top core 141 of the hemispherical shell, and even if slight wear occurs or the tightness of the fit changes due to thermal expansion and contraction, displacement compensation can be performed in time to ensure the normal use of the valve.

[0027] Reference Figure 3 and Fig.10 The inner wall of the cavity 1 of the main valve body 1 is located directly below the sliding rod 901 and is provided with a positioning groove 101, and an anti-slip top shaft 18 is slidably connected in the notch of the positioning groove 101, and a compression spring is fixed between the bottom end of the anti-slip top shaft 18 and the bottom of the groove; the axis line of the anti-slip top shaft 18 coincides with the axis line of the main transmission tube 142, and a limiting hole that matches the diameter and shape of the top end of the anti-slip top shaft 18 is provided on the side of the spherical surface of the hemispherical shell top core 141 away from the main transmission tube 142, and the top end of the anti-slip top shaft 18 is rounded; by setting the anti-slip top shaft 18, the hemispherical shell top core 141 can be prevented from generating axial eccentricity when rotating or receiving an unbalanced thrust from one side, which then causes the phenomenon that the valve cannot be closed tightly.

[0028] Reference Figure 3 , Figure 6 , Fig.13 The wall thickness of cavity one is smaller than that of cavity two, and a scraper strip mounting groove 103 is provided on the spherical inner wall of cavity one near the liquid inlet end cover 13, and an arc-shaped scraper strip 23 is embedded in the scraper strip mounting groove 103, and the upper and lower ends of the arc-shaped scraper strip 23 have a span greater than the maximum opening diameter of the matching sliding tube 16; the spherical surface of the hemispherical shell top core 141 can be additionally scraped to remove the stubbornly attached substances on its surface and reduce friction loss, and an annular groove 1 is provided on the vertical plane on the opposite side of the main valve body 1 and the liquid inlet end cover 13, and the same common sealing ring 17 is arranged between the two annular grooves 1 when they are combined.

[0029] Reference Figure 10-Figure 2 , the circumferential inner wall of the shaft neck tube 2 is reserved with annular grooves 2 near the upper and lower ends, and the two annular grooves 2 are respectively clamped with mutually symmetrical H-shaped sealing rings 25; the circumferential outer wall of the main transmission tube 142 is reserved with an annular sealing pad support 143 near the bottom end, and the cross-sectional shape of the annular sealing pad support 143 is adapted to the h-shaped sealing ring 25; the circumferential outer wall of the main transmission tube 142 is screwed with an internal thread tightener 4 near the top of the support platform 3; the bottom of the annular groove 2 near the top is provided with a through hole that penetrates the annular groove 2 below, and a tightening spring 26 and a T-shaped push rod 24 fixed at both ends thereof are slidably placed in the through hole; by arranging the T-shaped push rods 24 at both ends of the tightening spring 26, the two h-shaped sealing rings 25 can be tightly pressed against the annular sealing pad support 143 and the lower surface of the internal thread tightener 4, thereby improving the sealing effect of the device.

[0030] Reference Figure 3 , Figure 5 , Figure 7-Figure 8The top of the connecting rod 7 is fixed with a bearing seat, and the middle of the bearing seat is fixed with a bearing, and the mounting seat 5 is fixedly sleeved on the top of the bearing seat; the outer cover module includes a C-shaped card cover 501 fixed to the middle of the mounting seat 5 near the rear side, and the top of the C-shaped card cover 501 is fixed with an electric control positioning pin 9, and the end of the extension rod of the electric control positioning pin 9 is fixed to the top of the sliding rod 901 through a coupling; a front side guard plate 502 is fixed in front of the C-shaped card cover 501, and semi-cylindrical The two semi-cylindrical support plates are respectively sleeved and fixed with an outer cover 1 6 and an outer cover 2 10; the driving mechanism 15 includes a fan-shaped worm gear 154 sleeved and fixed on the outer wall of the main transmission tube 142 near the top, and the central angle of the fan-shaped worm gear 154 is between 90° and 110°; the two semi-cylindrical support plates of the mounting base 5 are respectively fixed with mutually adapted shaft rod seats 155, and the two shaft rod seats 155 are respectively rotatably connected with a long shaft rod and a short shaft rod 1 that are parallel to each other and of equal height, and the two ends of the long shaft rod are respectively fixed with The worm sleeve and the driving pulley are meshed with the fan-shaped worm wheel 154; the circumferential outer wall of the short shaft 1 is sleeved and fixed with a driven pulley 157, and the same toothed conveyor belt 156 is wound between the circumferential outer walls of the driving pulley and the driven pulley 157; the rotation of the fan-shaped worm wheel 154 can be achieved by controlling one section of the toothed conveyor belt 156 to move horizontally back and forth, thereby driving the rotation of the hemispherical shell top core 141; the inner wall of the outer cover 16 is fixed with a piston cylinder 151, and the piston cylinder 151 is integrally It is a cylindrical structure with a cavity inside, and the piston cylinder 151 is slidably connected to a piston push plate inside, an extended reciprocating push column 153 is fixed to the side of the piston push plate close to the toothed conveyor belt 156, and the end of the reciprocating push column 153 is fixed to the upper surface of the toothed conveyor belt 156; the two ends of the piston cylinder 151 are respectively connected with an oil inlet pipe 1 8 and an oil inlet pipe 2 152; the reciprocating push column 153 can be moved forward and backward by alternately squeezing high-pressure hydraulic oil into the set oil inlet pipe 1 8 and the oil inlet pipe 2 152.

[0031] Working principle: When installing the device, first install the locking compensation block 19 in place, then sleeve the H-shaped sealing ring 25 located below on the main transmission tube 142, and then insert the hemispherical shell top core 141 and the main transmission tube 142 from the opening of the cavity of the main valve body 1; finally, insert the T-shaped push rod 24 and the second tightening spring 26 into the corresponding through hole, and finally install the upper H-shaped sealing ring 25 and the internal thread tightener 4 in place; then fix the liquid inlet end cover 13 installed with the matching sliding tube 16 to the main valve body 1; finally, the drive mechanism 15 and the outer cover module Installation; finally, use two high-pressure oil pipes for driving to connect with the interfaces of oil inlet pipe 1 8 and oil inlet pipe 2 152 respectively; when the valve is closed, if the foreseeable pressure is going to increase, it is only necessary to control the electronically controlled positioning pin 9 to start, so as to drive the sliding push rod 901 to move downward and then push the top ball 903 downward. At this time, the top ball 903, under the action of the inclined surface of the locking compensation push block 19, will tightly squeeze the locking rib plate 144 and the top core 141 of the hemispherical shell onto the concave surface of the pipe mouth of the matching sliding push tube 16 at the orifice of the liquid inlet hole 1, thereby preventing the gap from further expanding and causing fluid overflow.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-performance compensating shear valve, comprising a main valve body (1) having a cavity 1 therein, wherein a liquid inlet end cover (13) is fixed to the main valve body (1) near the opening of the cavity 1 by bolts, a cavity 2 is reserved on a side of the liquid inlet end cover (13) near the cavity 1, the cavity 1 and the cavity 2 are combined into a same concentric spherical chamber, and the center of the spherical chamber is located in the main valve body (1), and a liquid inlet hole 1 and a liquid outlet hole 2 are reserved on opposite sides of the main valve body (1) and the liquid inlet end cover (13), respectively, which extend horizontally and pass through the center of the spherical chamber; characterized in that: A shaft neck tube (2) extending vertically upward is reserved at the top of the outer wall of the main valve body (1), and a support platform (3) is reserved at the top of the shaft neck tube (2); a plurality of mutually parallel connecting rods (7) are fixed to the top of the support platform (3), and a mounting base (5) is provided at the top of the connecting rod (7); a driving mechanism (15) and an outer cover module are respectively provided on the upper surface of the mounting base (5); a valve stem module (14) is provided in the shaft neck tube (2), and the valve stem module (14) comprises a main transmission tube (142) rotatably connected to the shaft neck tube (2), and the bottom of the main transmission tube (142) is provided with a valve stem module (144). A hemispherical shell top core (141) with a melon-shaped structure is fixed at the end; and a tightening rib plate (144) extending toward the center of the ball is fixed on the inner arc side of the hemispherical shell top core (141); a sliding rod (901) is sealingly and slidably connected inside the main transmission tube (142), and a compact spring (902) is fixed at the bottom end of the sliding rod (901), and a top ball (903) is fixed at the bottom end of the compact spring (902); a locking compensation block (19) extending toward the middle is fixed on the inner wall of the cavity one near the second liquid outlet hole, and an inclined surface is reserved on the side of the locking compensation block (19) near the top ball (903).

2. The high performance compensated shear valve according to claim 1, characterized in that: A T-shaped slide groove (102) is formed on the inner wall of the top of the second liquid outlet hole, and anti-slip wing plates are reserved on both sides of the locking compensation stopper (19), and the locking compensation stopper (19) and the two anti-slip wing plates are simultaneously slidably inserted into the T-shaped slide groove (102); a limit stopper (191) is welded and fixed to one end of the T-shaped slide groove (102) away from the liquid inlet end cover (13), and a self-locking screw hole is formed in the middle of the limit stopper (191), and a jacking bolt is screwed into the self-locking screw hole.

3. The high performance compensated shear valve according to claim 1, characterized in that: The main valve body (1), the liquid inlet end cover (13) and the components inside thereof constitute a valve body module, and flanges are reserved at the ends of the main valve body (1) and the liquid inlet end cover (13) that are away from each other and are located at the openings of the second liquid outlet hole and the first liquid inlet hole, and recesses (11) are reserved near the bottom ends of the two flanges on the opposite sides; L-shaped mounting plates (12) are fixed in the two recesses (11) by bolts.

4. The high performance compensated shear valve according to claim 1, characterized in that: A vertical arc groove is reserved on one side of the abutting rib plate (144) close to the top ball (903), and the axis of the arc groove is parallel to the axis of the sliding abutting rod (901).

5. The high performance compensated shear valve according to claim 1, characterized in that: The cross-section of the compact spring (902) is rectangular, and a stud is sleeved on the top end of the compact spring (902), and a screw hole matched with the stud is reserved at the bottom end of the sliding rod (901); a rubber ring is sleeved on the circumferential outer wall of the sliding rod (901) near the bottom end, and a cylindrical expansion hole matched with the outer diameter of the rubber ring is reserved on the circumferential inner wall of the main transmission tube (142) near the bottom end, and the inner wall of the cylindrical expansion hole is polished.

6. The high performance compensated shear valve according to claim 1, characterized in that: A stepped groove (131) is machined on one end of the circumferential inner wall of the liquid inlet hole 1 near the cavity 2, and a matching sliding abutment tube (16) is slidably engaged in the stepped groove (131), and a concave surface matching the spherical size of the hemispherical shell top core (141) is reserved at the opening of one end of the matching sliding abutment tube (16) near the main valve body (1); the stepped groove (131) includes two mutually parallel and vertical annular planes, and the annular plane away from the hemispherical shell top core (141) is A plurality of spring storage holes (132) are provided on the plane and are symmetrically distributed in the center. A clamping spring (21) is provided in each of the spring storage holes (132). The ends of the plurality of clamping springs (21) away from the bottom of the holes are fixed with a same wear-resistant retaining ring (22). A same flexible graphite ring (20) is provided between the wear-resistant retaining ring (22) and the circumferential outer wall of the matching sliding retaining tube (16). The circumferential inner wall of the matching sliding retaining tube (16) has the same aperture as the aperture of the liquid inlet hole (1).

7. The high performance compensated shear valve according to claim 1, characterized in that: The inner wall of the cavity 1 of the main valve body (1) is provided with a positioning recessed groove (101) directly below the sliding stop rod (901), and an anti-dropping top shaft (18) is slidably connected in the notch of the positioning recessed groove (101), and a compression spring is fixed between the bottom end of the anti-dropping top shaft (18) and the bottom of the groove; the axis of the anti-dropping top shaft (18) coincides with the axis of the main transmission tube (142), and a limiting hole that matches the diameter and shape of the top end of the anti-dropping top shaft (18) is provided on the side of the spherical surface of the hemispherical shell top core (141) away from the main transmission tube (142), and the top end of the anti-dropping top shaft (18) is rounded.

8. The high performance compensated shear valve according to claim 6, characterized in that: The wall thickness of the cavity one is smaller than that of the cavity two, and a scraper strip installation groove (103) is formed on the spherical inner wall of the cavity one near the liquid inlet end cover (13), and an arc-shaped scraper strip (23) is embedded in the scraper strip installation groove (103), and the span of the upper and lower ends of the arc-shaped scraper strip (23) is larger than the maximum opening diameter of the matching sliding tube (16); the spherical surface of the hemispherical shell top core (141) can be additionally scraped, and an annular groove one is formed on the vertical plane on the side opposite to the main valve body (1) and the liquid inlet end cover (13), and a common sealing ring (17) is provided between the two annular grooves when they are combined.

9. The high performance compensated shear valve according to claim 1, characterized in that: The circumferential inner wall of the shaft neck tube (2) is provided with two annular grooves near both ends, and the two annular grooves are respectively clamped with mutually symmetrical H-shaped sealing rings (25); the circumferential outer wall of the main transmission tube (142) is provided with an annular sealing pad support (143) near the bottom end, and the cross-sectional shape of the annular sealing pad support (143) is compatible with the H-shaped sealing ring (25); the circumferential outer wall of the main transmission tube (142) is screwed with an internal threaded tightener (4) near the top end of the support platform (3); the bottom of the annular groove two near the top end is provided with a through hole that penetrates the annular groove two below, and a tightening spring two (26) and a T-shaped push rod (24) fixed at both ends are slidably placed in the through hole.

10. The high performance compensated shear valve according to claim 1, characterized in that: A bearing seat is fixed at the top of the connecting rod (7), and a bearing is fixed in the middle of the bearing seat, and the mounting seat (5) is fixedly sleeved on the top of the bearing seat; the outer cover module comprises a C-shaped card cover (501) fixed in the middle of the mounting card cover (5) near the rear side, and an electric control positioning pin (9) is fixed at the top of the C-shaped card cover (501), and the end of the extension rod of the electric control positioning pin (9) is fixed to the top of the sliding rod (901) through a coupling; the front of the C-shaped card cover (501) is fixed There is a front side guard plate (502), and semi-cylindrical support plates are reserved on both sides of the mounting base (5), and the two semi-cylindrical support plates are respectively sleeved and fixed with an outer cover (6) and an outer cover (10); the driving mechanism (15) comprises a fan-shaped worm gear (154) sleeved and fixed on the outer wall of the main transmission tube (142) near the top, and the central angle of the fan-shaped worm gear (154) is between 90° and 110°; the two semi-cylindrical support plates of the mounting base (5) are respectively fixed with mutually matching A shaft seat (155), and the two shaft seats (155) are respectively rotatably connected with a long shaft and a short shaft one which are parallel to each other and have the same height, and the two ends of the long shaft are respectively fixed with a worm sleeve and a driving pulley, and the worm sleeve and the fan-shaped worm wheel (154) are meshed with each other; the circumferential outer wall of the short shaft one is sleeved and fixed with a driven pulley (157), and the same toothed conveyor belt (156) is wound between the circumferential outer walls of the driving pulley and the driven pulley (157); the inner wall of the outer cover one (6) A piston cylinder (151) is fixed thereto. The piston cylinder (151) is a cylindrical structure with a cavity therein as a whole. A piston push plate is slidably connected to the interior of the piston cylinder (151). A reciprocating push column (153) is fixed to the side of the piston push plate close to the toothed conveyor belt (156). The end of the reciprocating push column (153) is fixed to the upper surface of the toothed conveyor belt (156). Oil inlet pipe 1 (8) and oil inlet pipe 2 (152) are respectively plugged into the two ends of the piston cylinder (151).

Images