Labor-saving high-sealing ball valve with convenient opening and closing

Abstract

A labor-saving high-sealing ball valve convenient to open and close, comprising a labor-saving opening and closing mechanism, a shell and a valve body; the valve body is provided with an inlet and an outlet at left and right ends, and a valve rod passage at the top; the labor-saving opening and closing mechanism comprises a valve core assembly and an opening and closing assembly; the valve core assembly comprises a ball, an inner valve seat and an outer valve seat; the bottom of the ball is fixedly connected with the bottom end of the middle part of the valve body through a column, and the top is provided with a valve rod; the top of the inner valve seat and the outer valve seat is respectively provided with a rotating cylinder one and a rotating cylinder two, and the rotating cylinder one and the rotating cylinder two are coaxially sleeved together with the ball through the rotating cylinder one and the rotating cylinder two around the valve rod, and the valve rod, the rotating cylinder one and the rotating cylinder two extend out of the valve body through the valve rod passage; the ball, the inner valve seat and the outer valve seat are respectively provided with through holes one, two and three with the same axial height; the opening and closing assembly is fixedly connected with the rotating cylinder one and the rotating cylinder two; the labor-saving opening and closing mechanism can shorten the angle needed to be rotated when the ball valve is closed and opened, and can be more labor-saving when the ball valve is opened and closed.

Description

Technical Field

[0001] This invention relates to the technical field of ball valves, and more particularly to a labor-saving, high-sealing ball valve that is easy to switch on and off. Background Technology

[0002] The main characteristics of ball valves are their compact structure, reliable sealing, simple design, and convenient maintenance. The sealing surface and the ball are constantly in a closed state, making them less susceptible to erosion by the medium. They are easy to operate and maintain, suitable for general working media such as water, solvents, acids, and natural gas, and also for media with harsh working conditions, such as oxygen, hydrogen peroxide, methane, and ethylene. Therefore, ball valves are widely used in various industries. Regardless of whether the valve seat is a single or combined design, various factors can cause the seat to not seal properly, leading to media leakage in the pipeline. Therefore, media leakage is one of the common problems with ball valves. Currently, the sealing structure between the valve stem and the ball in most valves is too complex, especially the traditional compression packing seal method, which has many drawbacks. The packing preload is difficult to adjust; too tight a packing increases friction and torque, while too loose a packing results in poor sealing. Furthermore, there is no sealing compensation, and adjustments are generally required after a period of use. Especially in large equipment, the ball valves used are very large and heavy, making each start and stop of the ball valve labor-intensive while ensuring a good seal.

[0003] Therefore, it is necessary to invent a labor-saving ball valve that is easy to open and close and has high sealing performance. Summary of the Invention

[0004] To address the problems in the background art, the present invention provides a labor-saving, high-sealing ball valve that is easy to operate, and the specific technical solution is as follows: A labor-saving, high-sealing ball valve with easy switching includes a labor-saving switching mechanism, a regulating switch, a first sealing mechanism, a second sealing mechanism, a housing, and a valve body. The valve body has a raised center, with inlets and outlets at the left and right ends, and a valve stem channel perpendicular to the inlets and outlets at the top. The labor-saving switching mechanism includes a valve core assembly disposed within the center of the valve body and a switching assembly fixedly disposed outside the valve body. The valve core assembly includes a ball, an inner valve seat, and an outer valve seat that fit tightly together sequentially from the inside out. The bottom of the ball is fixed to the bottom end of the center of the valve body via a column. The valve body is connected to a ball, with a valve stem at the top. The inner and outer valve seats are respectively equipped with rotating cylinders one and two at their tops, which are coaxially mounted around the valve stem and ball. The valve stem, rotating cylinders one and two extend through the valve stem channel to the valve body. The ball, inner valve seat, and outer valve seat are respectively provided with through holes one, two, and three of the same axial height. The switch assembly is fixedly connected to rotating cylinders one and two, and is used to drive the inner and outer valve seats to rotate synchronously in opposite directions, thereby controlling the connection or disconnection of through holes one, two, and three. The regulating switch is mounted on the housing and is used to regulate sealing mechanism one and sealing mechanism two; the housing is fixedly mounted on the valve body. Both sealing mechanism one and sealing mechanism two are mounted on the valve body; sealing mechanism two is provided with two sealing rubber rings two; the two sealing rubber rings two are respectively located at the left and right ends of the inner wall of the middle part of the valve body, and their inner sides abut against the outer wall of the outer valve seat, so as to form a seal between the outer valve seat and the inlet and outlet of the left and right ends of the valve body; sealing mechanism one is provided with a sealing rubber ring one, which is located in the valve stem channel at the top of the valve body, so as to form a seal between the outer valve seat and the valve stem channel at the top of the valve body.

[0005] Furthermore, the switch assembly is provided with gear one, gear two, gear three, gear four and a fixing bracket one; the fixing bracket one is fixedly installed on the valve body and is provided with a through hole four for the valve stem, rotating cylinder one and rotating cylinder two to pass through; Gear 3 and gear 4 are rotatably mounted on the fixed frame 1, and the two mesh with each other; Gear 1 is fixedly mounted on the inner valve seat through the through hole 4 on the fixed frame 1, and gear 1 meshes with gear 3; Gear 2 is fixedly mounted on the outer valve seat through the through hole 4 on the fixed frame 1, and gear 2 meshes with gear 4; A handwheel is fixedly mounted on gear 4; The diameters of gear 3 and gear 4 are both smaller than those of gear 1 and gear 2.

[0006] Furthermore, the regulating switch is provided with a rotating rod, a limiting block, and a locking plate; the limiting block is fixedly installed on the housing, and its upper end is provided with at least two limiting holes and a through hole five for the front end of the rotating rod to pass through; the housing is provided with a through hole six for the front end of the rotating rod to pass through; a rotating block is provided at the rear end of the rotating rod, and the rotating block is rotatably installed on the limiting block. The front end of the rotating rod passes through the through hole five on the limiting block and the through hole six on the housing, and is connected to sealing mechanism one and sealing mechanism two; the rotating block at the rear end of the rotating rod is provided with the same limiting hole two coaxially with the limiting hole on the limiting block; the locking plate is slidably installed on the rotating block at the rear end of the rotating rod, and its bottom end is provided with a limiting post corresponding to the limiting hole on the limiting block and the limiting hole two on the rotating block; the locking plate drives the rotating rod to rotate, thereby regulating sealing mechanism one and sealing mechanism two.

[0007] Furthermore, the sealing mechanism is also provided with a fixed frame three and a transmission wheel set; the fixed frame three is fixedly installed on the valve body; an airbag one is fixedly installed on the fixed frame three, the airbag one is fixedly connected to the sealing ring one, and the interiors are connected; a lead screw is rotatably installed on the fixed frame three, and one end of the lead screw is connected to the front end of the rotating rod through the transmission wheel set; the front end of the rotating rod is rotatably installed on the fixed frame three; a pressure plate corresponding to the airbag one is slidably installed on the lead screw.

[0008] Furthermore, the sealing mechanism two is also provided with a cam, a fixing plate, an airbag two, and a driving device; at least one of the cams is fixedly installed on the front end of the rotating rod; the fixing plate abuts against the cam; two driving devices are symmetrically installed on the valve body and are respectively fixedly connected to one end of the fixing plate; the airbag two is located in the middle of the two driving devices, and its left and right sides are respectively fixedly connected to the two driving devices; the upper and lower ends of the airbag two are respectively fixedly connected to two sealing rubber rings two, and their interiors are connected.

[0009] Furthermore, the drive device is provided with a fixed frame two and a cylinder; the fixed frame two is fixedly installed on the valve body; a movable plate is slidably installed vertically on the upper end of the fixed frame two, a movable plate two is elastically slidably installed vertically on the lower end, and a pressure plate two is slidably installed horizontally in the middle position; the upper end of the movable plate is fixedly connected to the fixed plate, and the lower end is provided with an inclined surface, which abuts against the cylinder rotatably installed on the pressure plate two, and the movable plate drives the cylinder to move closer to the airbag two; the upper end of the movable plate two is provided with an inclined surface that abuts against the cylinder, and the movable plate two drives the cylinder to move away from the airbag two; one end of the pressure plate two is fixedly connected to the airbag two; the movement of the pressure plate two compresses and releases the airbag two.

[0010] Furthermore, the inner valve seat has a drain hole a, and the outer valve seat has a drain hole b. Both drain holes a and b correspond to a through hole on either side of the ball, which is used to allow the liquid inside the valve core assembly to flow out.

[0011] Compared with the prior art, the advantages of the present invention are as follows: (1) The present invention can shorten the angle of rotation required when the ball valve is closed and opened by means of a force-saving switching mechanism, and can save more effort when opening and closing the ball valve; (2) The present invention changes the sealing method of transmission by sealing mechanism one and sealing mechanism two. The ball valve is sealed by sealing ring one and sealing ring two, which reduces the requirement for the gap between the valve body and the outer valve seat, thereby reducing the friction between the valve body and the outer valve seat, and making the ball valve opening and closing more effortless. Attached Figure Description

[0012] Figure 1-2 This is a schematic diagram of the assembly structure of the present invention; Figure 3 This is a schematic diagram of the assembly structure of the force-saving switch mechanism of the present invention; Figure 4 This is a partial structural cross-sectional view of the force-saving switch mechanism of the present invention; Figure 5 This is a schematic diagram of the assembly structure of the force-saving switching mechanism and valve body of the present invention; Figure 6-7 This is a schematic diagram of the structure of the inner valve ball and the outer valve ball of the present invention; Figure 8 This is a schematic diagram of the assembly structure of the ball, inner valve ball, and outer valve ball of the present invention; Figure 9 This is a schematic diagram of the assembly structure of the regulating switch of the present invention; Figure 10 This is an exploded view of the regulating switch of the present invention; Figure 11-12 Cross-sectional views of the adjusting switch of the present invention at different positions; Figure 13-14 This is a schematic diagram of the assembly structure of the regulating switch, sealing mechanism one, sealing mechanism two, and valve body of the present invention; Figure 15-16 This is a schematic diagram of the assembly structure of the sealing mechanism and the adjusting switch of the present invention; Figure 17 This is a schematic diagram of the assembly structure of the fixing bracket and the lead screw of the present invention; Figure 18 This is a schematic diagram of the assembly structure of sealing mechanism one, sealing mechanism two, and part of the effort-saving switch mechanism of the present invention; Figure 19 This is a schematic diagram of the assembly structure of the regulating switch and the second sealing mechanism of the present invention; Figure 20 This is a schematic diagram of the assembly structure of the second driving device of the present invention; Figure 21 This is a cross-sectional view of the second driving device of the present invention; Figure 22 This is a schematic diagram of the structure of the second fixing frame of the present invention; Figure 23 This is a schematic diagram of the structure of the pressure plate 2 of the present invention; Figure 24 This is a schematic diagram of the assembly structure of the housing and the regulating switch of the present invention.

[0013] In the diagram: 1. Effort-saving switch mechanism (101 ball, 102 inner valve seat, 103 outer valve seat, 104 gear one, 105 gear two, 106 handwheel, 107 gear three, 108 gear four, 109 fixed frame one); 2. Adjusting switch (201 rotating rod, 202 limit block, 203 clamping plate); 3. Sealing mechanism one (301 fixed frame three, 302 rotating wheel group, 303 lead screw, 304 pressure plate, 305 air bag one, 306 sealing ring one); 4. Sealing mechanism two (401 cam, 402 fixed plate, 403 moving plate, 404 fixed frame two, 405 pressure plate two, 406 moving plate two, 407 air bag two, 408 cylinder, 409 sealing ring two); 5. Housing; 6. Valve body. Detailed Implementation

[0014] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0015] Example: like Figure 1-2 As shown, a labor-saving, high-sealing ball valve that is easy to operate includes a labor-saving switching mechanism 1, a regulating switch 2, a sealing mechanism 1 3, a sealing mechanism 2 4, a housing 5, and a valve body 6. The valve body 6 has a raised middle section, with inlets and outlets at the left and right ends, and a valve stem channel perpendicular to the inlet and outlet at the top. The labor-saving switching mechanism 1 includes a valve core assembly disposed in the middle of the valve body 6 and a switching assembly fixedly disposed outside the valve body 6. The valve core assembly includes a ball 101, an inner valve seat 102, and an outer valve seat 103 that are tightly fitted together from the inside to the outside. The bottom of the ball 101 is fixedly connected to the bottom end of the middle of the valve body 6 through a column, and a valve stem is provided at the top. The inner valve seat 102 and the outer valve seat 103 are also provided. The top of the valve body 6 is provided with rotating cylinder 1 and rotating cylinder 2, which are coaxially mounted with the valve stem and ball 101. The valve stem, rotating cylinder 1 and rotating cylinder 2 extend out of the valve body 6 through the valve stem channel. The ball 101, inner valve seat 102 and outer valve seat 103 are respectively provided with through holes 1, 2 and 3 of the same axial height. The switch assembly is fixedly connected to rotating cylinder 1 and rotating cylinder 2 and is used to drive the inner valve seat 102 and outer valve seat 103 to rotate synchronously in opposite directions, thereby realizing the connection or disconnection of through holes 1, 2 and 3. The regulating switch 2 is installed on the housing 5 and is used to regulate sealing mechanism 1 3 and sealing mechanism 2 4. The housing 5 is fixedly installed on the valve body 6. Both sealing mechanism 1 (3) and sealing mechanism 2 (4) are mounted on valve body 6. Sealing mechanism 2 (4) is provided with two sealing rings 2 (409). The two sealing rings 2 (409) are respectively located at the left and right ends of the inner wall of the middle part of valve body 6, and their inner sides abut against the outer wall of outer valve seat 103, so as to form a seal between outer valve seat 103 and the inlet and outlet of valve body 6 at the left and right ends. Sealing mechanism 1 (3) is provided with sealing ring 1 (306), which is located in the valve stem channel at the top of valve body 6, so as to form a seal between outer valve seat 103 and valve stem channel at the top of valve body 6. The inner wall of valve body 6 is provided with mounting grooves for sealing ring 1 (306) and sealing ring 2 (409), which are installed in the mounting grooves inside valve body 6.

[0016] Specifically, such as Figure 2-5As shown, the switch assembly is provided with gear 104, gear 2 105, gear 3 107, gear 4 108 and fixing bracket 109; fixing bracket 109 is fixedly installed on valve body 6 and is provided with through hole 4 for valve stem, rotating cylinder 1 and rotating cylinder 2 to pass through. Gear 3 107 and gear 4 108 are rotatably mounted on the fixed bracket 109, and the two mesh with each other; the rotating cylinder 1 on the inner valve seat 102 passes through the through hole 4 on the fixed bracket 109 and is fixedly mounted with gear 1 104, and gear 1 104 meshes with gear 3 107; the rotating cylinder 2 on the outer valve seat 103 passes through the through hole 4 on the fixed bracket 109 and is fixedly mounted with gear 2 105, and gear 2 105 meshes with gear 4 108; a handwheel 106 is fixedly mounted on gear 4 108; the diameters of gear 3 107 and gear 4 108 are both smaller than those of gear 1 104 and gear 2 105.

[0017] Rotating handwheel 106 drives gear four 108 to rotate, which in turn drives gear two 105 to rotate, which in turn drives the outer valve seat 103 to rotate. Simultaneously, gear four 108 drives gear three 107 to rotate, which in turn drives gear one 104 to rotate, which in turn drives the inner valve seat 102 to rotate. Since gear one 104 and gear two 105 rotate in opposite directions, the outer valve seat 103 and the inner valve seat 102 rotate in opposite directions. By simultaneously rotating the outer valve seat 103 and the inner valve seat 102, they block the through hole one on the ball 101, thus blocking the flow of liquid. Turning handwheel 106 allows the liquid to continue flowing. Compared with the prior art, this invention achieves this by driving gear three 108 to rotate. The rotation of gear 7 and gear 4 108, in turn, synchronously drives gear 1 104 and gear 2 105 to rotate, thereby rotating the outer valve seat 103 and the inner valve seat 102, thus blocking the through hole 1 on the ball 101. The small gear drives the large gear, which is more labor-saving. Moreover, the outer valve seat 103 and the inner valve seat 102 rotate in opposite directions to block the ball 101. Compared with the traditional unidirectional rotation, turning the handwheel 106 can rotate a smaller angle to block the through hole 1 on the ball 101, which is more labor-saving and reduces the labor intensity of workers. In addition, the outer valve seat 103 and the inner valve seat 102 simultaneously block both ends of the through hole 1 on the ball 101, and the pressure they bear is less than that of closing the ball in one direction, thus further saving labor.

[0018] As a specific implementation method of this embodiment, such as Figure 6-8As shown, the inner valve seat 102 has a drain hole a1021, and the outer valve seat 103 has a drain hole b1031. Both drain holes a1021 and b1031 correspond to a via hole on either side of the ball 101, allowing liquid inside the valve core assembly to flow out. When the inner valve seat 102 and outer valve seat 103 block the via hole on the ball 101, the two drain holes a and b on the inner valve seat 102 and outer valve seat 103 coincide and communicate with one side of the via hole on the ball 101. Drain holes a and b ensure that after the inner valve seat 102 and outer valve seat 103 block the ball 101, there will be no large accumulation of liquid or excessive pressure within the space enclosed by the ball 101, inner valve seat 102, and outer valve seat 103; this extends the service life of the equipment.

[0019] Specifically, such as Figure 9-12 As shown in Figure 24, the regulating switch 2 is provided with a rotating rod 201, a limiting block 202, and a retaining plate 203; the limiting block 202 is fixedly installed on the housing 5, and its upper end is provided with two limiting holes and a through hole five for the front end of the rotating rod 201 to pass through; the housing 5 is provided with a through hole six for the front end of the rotating rod 201 to pass through; a rotating block is provided on the rear end of the rotating rod 201, and the rotating block is rotatably installed on the limiting block 202. The front end of the rotating rod 201 passes through the through hole five on the limiting block 202 and the through hole six on the housing 5, and is connected to the sealing mechanism 1 3 and the sealing mechanism 2 4; the rotating block at the rear end of the rotating rod 201 is coaxial with the limiting hole on the limiting block 202. The device has two identical limiting holes; the clamping plate 203 is slidably mounted on the rotating block at the rear end of the rotating rod 201, and its bottom end has a limiting post corresponding to the limiting hole on the limiting block 202 and the second limiting hole on the rotating block; the clamping plate 203 has a groove, and the rotating block at the rear end of the rotating rod 201 has a corresponding protrusion, so that the clamping plate 203 and the rotating rod 201 can rotate synchronously; the length of the groove on the clamping plate 203 is greater than the length of the limiting post, so that when the clamping plate 203 leaves the limiting block 202, it can drive the rotating rod 201 to rotate; by driving the rotating rod 201 to rotate through the clamping plate 203, the sealing mechanism 1 3 and the sealing mechanism 2 4 are controlled.

[0020] As a specific implementation of this embodiment, the clamping plate 203 and the rear end of the rotating rod 201 are elastically connected by a spring (not shown in the figure). The operator pulls the clamping plate 203 outward, causing the limiting post on the clamping plate 203 to disengage from the limiting hole on the limiting block 202, and then rotates it, thereby driving the rotating rod 201 to rotate. When it reaches the designated position after rotating half a revolution, the operator releases the hand, and the clamping plate 203 can be reset under the action of the spring. At this time, the limiting post on the clamping plate 203 is reinserted into the limiting hole on the limiting block 202 to limit the clamping plate 203.

[0021] Furthermore, such as Figure 4 and 13As shown in Figure -18, the sealing mechanism 3 is also equipped with a fixed frame 301 and a transmission wheel set 302; the fixed frame 301 is fixedly installed on the valve body 6; an airbag 305 is fixedly installed on the fixed frame 301, the airbag 305 is fixedly connected to the sealing ring 306, and the interiors are connected; a lead screw 303 is rotatably installed on the fixed frame 301, and one end of the lead screw 303 is connected to the front end of the rotating rod 201 through the transmission wheel set 302; the front end of the rotating rod 201 is rotatably installed on the fixed frame 301; a pressure plate 304 corresponding to the airbag 305 is slidably installed on the lead screw 303. As a specific implementation method of this embodiment, such as Figure 17 As shown, in order to facilitate the compression of the airbag 305, a baffle is provided on one side of the fixing frame 301, which can better compress the airbag 305 and prevent the airbag 305 from deforming and affecting the compression effect, thereby affecting the sealing effect of the sealing strip 306.

[0022] The operator pulls the clamp plate 203 and rotates it, causing the rotating rod 201 to rotate. The rotating rod 201 drives the lead screw 303 to rotate through the transmission wheel set 302, which in turn drives the pressure plate 304 to move towards the airbag 305, and then compresses the airbag 305. The air inside the airbag 305 enters the sealing ring 306, which inflates and expands, sealing the outer valve seat 103 and the valve body 6 in the vertical direction, preventing the liquid between the outer valve seat 103 and the valve body 6 from flowing to the outside through the valve stem channel of the valve body 6.

[0023] To prevent the liquid flowing inside the valve body 6 from entering the gap between the outer valve seat 103 and the valve body 6, such as Figure 18-23 As shown, the sealing mechanism 4 is also provided with a cam 401, a fixing plate 402, an airbag 407, and a driving device; at least one cam 401 is fixedly installed on the front end of the rotating rod 201; the fixing plate 402 abuts against the cam 401; two driving devices are symmetrically installed on the valve body 6 and are respectively fixedly connected to one end of the fixing plate 402; the airbag 407 is located in the middle of the two driving devices and is fixedly connected to the two driving devices on the left and right sides respectively; the upper and lower ends of the airbag 407 are respectively fixedly connected to two sealing rings 409 and are internally connected.

[0024] As a specific implementation method of this embodiment, such as Figure 21-23As shown, the second drive device is equipped with a second fixed frame 404 and a cylinder 408; the second fixed frame 404 is fixedly installed on the valve body 6; a movable plate 403 is slidably installed on the upper end of the second fixed frame 404, a movable plate 406 is elastically slidably installed on the lower end, and a pressure plate 405 is slidably installed on the middle position; the upper end of the movable plate 403 is fixedly installed on the fixed plate 402, and the lower end is provided with an inclined surface, which abuts against the cylinder 408 rotatably installed on the pressure plate 405, and the movable plate 403 drives the cylinder 408 to move closer to the second airbag 407, thereby driving the pressure plate 405 to move towards the second airbag 407; one end of the pressure plate 405 is fixedly connected to the second airbag 407; the movement of the pressure plate 405 compresses and releases the second airbag 407.

[0025] In order to securely mount the second airbag 407 onto the second pressure plate 405, the second pressure plate 405 is provided with a push rod at one end near the second airbag 407, and an adhesive platform is provided at one end of the push rod. The left and right ends of the second airbag 407 are fixedly glued to the two adhesive platforms with glue.

[0026] The upper end of the movable plate 406 is provided with an inclined surface that abuts against the cylinder 408. The movable plate 406 drives the cylinder 408 to move away from the airbag 407. The operator pulls the clamping plate 203 and then rotates it, which drives the rotating rod 201 to rotate. The two cams 401 on the front end of the rotating rod 201 rotate, which drives the fixed plate 402 to move downward. The fixed plate 402 drives the two movable plates 403 to slide downward, thereby pushing the two pressure plates 405 to move towards the airbag 407 and compressing the airbag 407. The gas in the airbag 407 flows into the two sealing rings 409. The sealing rings 409 inflate and expand, thereby sealing the outer valve seat 103 and the valve body 6 in the left and right directions, so that the liquid flowing in the valve body 6 cannot flow into the gap between the outer valve seat 103 and the valve body 6.

[0027] Working principle: In the initial state, the sealing rings 306 and 409 are not inflated, and the valve core assembly is in the closed state. The operator turns the handwheel 106, which drives the inner valve seat 102 and the outer valve seat 103 to rotate, opening the valve core assembly. Then, the operator pulls the latch plate 203 and rotates it, allowing the air in the airbags 305 and 407 to enter the sealing rings 306 and 409 respectively, sealing the outer valve seat 103 and the valve body 6. When it is necessary to close the valve core assembly, the operator pulls the latch plate 203 and rotates it in the opposite direction, allowing the air in the sealing rings 306 and 409 to return to the airbags 305 and 407. Then, the operator rotates the handwheel 106 in the opposite direction to close the valve core assembly. To open it again, the above operation is repeated.

[0028] The above are merely preferred embodiments of this example, but the scope of protection of this example is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this example, based on the technical solution and inventive concept of this example, should be covered within the scope of protection of this example.

Claims

1. A labor-saving, high-sealing ball valve that is easy to open and close, characterized in that, The device includes a labor-saving switch mechanism (1), an adjusting switch (2), a sealing mechanism one (3), a sealing mechanism two (4), a housing (5), and a valve body (6). The valve body (6) has a raised center, with an inlet and an outlet at the left and right ends, and a valve stem channel perpendicular to the inlet and outlet at the top. The labor-saving switch mechanism (1) includes a valve core assembly located in the center of the valve body (6) and a switch assembly fixedly located outside the valve body (6). The valve core assembly includes a ball (101), an inner valve seat (102), and an outer valve seat that are tightly fitted together from the inside to the outside. Valve seat (103); the bottom of the ball (101) is fixedly connected to the bottom end of the middle part of the valve body (6) through the column, and the top is provided with a valve stem; the top of the inner valve seat (102) and the outer valve seat (103) are respectively provided with a rotating cylinder one and a rotating cylinder two, and the rotating cylinder one and the rotating cylinder two are coaxially rotated together with the ball (101) around the valve stem, and the valve stem, rotating cylinder one and rotating cylinder two extend out of the valve body (6) through the valve stem channel; the ball (101), the inner valve seat (102) and the outer valve seat (103) are respectively provided with a through hole one with the same axial height. Through hole 2 and through hole 3; the switch assembly is fixedly connected to rotating cylinder 1 and rotating cylinder 2, and is used to drive the inner valve seat (102) and the outer valve seat (103) to rotate synchronously in opposite directions, thereby realizing whether through hole 1, through hole 2 and through hole 3 are connected or not; the regulating switch (2) is installed on the housing (5) and is used to regulate sealing mechanism 1 (3) and sealing mechanism 2 (4); the housing (5) is fixedly installed on the valve body (6); the sealing mechanism 1 (3) and sealing mechanism 2 (4) are both installed on the valve body (6); the sealing mechanism 2 (4) is provided with There are two sealing rings (409); the two sealing rings (409) are respectively disposed on the left and right ends of the inner wall of the middle part of the valve body (6), and their inner sides abut against the outer wall of the outer valve seat (103), for forming a seal between the outer valve seat (103) and the inlet and outlet of the valve body (6) at the left and right ends; the sealing mechanism (3) is provided with a sealing ring (306), the sealing ring (306) is disposed in the valve stem channel at the top of the valve body (6), for forming a seal between the outer valve seat (103) and the valve stem channel at the top of the valve body (6); The switch assembly is provided with gear one (104), gear two (105), gear three (107), gear four (108) and a fixing bracket one (109); the fixing bracket one (109) is fixedly installed on the valve body (6) and is provided with a through hole four for the valve stem, rotating cylinder one and rotating cylinder two to pass through; gear three (107) and gear four (108) are rotatably installed on the fixing bracket one (109) and the two mesh with each other; rotating cylinder one on the inner valve seat (102) passes through the through hole four on the fixing bracket one (109). Gear 1 (104) is fixedly installed in hole 4, and gear 1 (104) meshes with gear 3 (107); the rotating cylinder 2 on the outer valve seat (103) passes through hole 4 on the fixing frame 1 (109) and gear 2 (105) is fixedly installed, and gear 2 (105) meshes with gear 4 (108); a handwheel (106) is fixedly installed on gear 4 (108); the diameters of gear 3 (107) and gear 4 (108) are both smaller than those of gear 1 (104) and gear 2 (105); Turning the handwheel (106) drives gear four (108) to rotate, which in turn drives gear two (105) to rotate, which in turn drives the outer valve seat (103) to rotate. Simultaneously, gear four (108) drives gear three (107) to rotate, which in turn drives gear one (104) to rotate, which in turn drives the inner valve seat (102) to rotate. Since gear one (104) and gear two (105) rotate in opposite directions, the outer valve seat (103) and the inner valve seat (102) rotate in opposite directions. By simultaneously rotating the outer valve seat (103) and the inner valve seat (102), the outer valve seat (103) and the inner valve seat (102) block the through hole one on the ball (101), thus blocking the flow of liquid. Turning the handwheel... (106) allows the liquid to continue to flow; by driving gear three (107) and gear four (108) to rotate, and then driving gear one (104) and gear two (105) to rotate simultaneously, the outer valve seat (103) and inner valve seat (102) are rotated, thereby blocking the through hole one on the ball (101). It is more labor-saving to drive the large gear through the small gear transmission, and the outer valve seat (103) and inner valve seat (102) rotate in opposite directions to block the ball (101). Compared with the traditional unidirectional rotation, turning the handwheel (106) can rotate a smaller angle to block the through hole one on the ball (101); the outer valve seat (103) and inner valve seat (102) simultaneously block the flow at both ends of the through hole one on the ball (101).

2. The easy-to-operate, labor-saving, high-sealing ball valve according to claim 1, characterized in that: The regulating switch (2) is provided with a rotating rod (201), a limiting block (202), and a locking plate (203); the limiting block (202) is fixedly installed on the housing (5), and its upper end is provided with at least two limiting holes and a through hole five for the front end of the rotating rod (201) to pass through; the housing (5) is provided with a through hole six for the front end of the rotating rod (201) to pass through; a rotating block is provided on the rear end of the rotating rod (201), and the rotating block is rotatably installed on the limiting block (202), and the front end of the rotating rod (201) passes through the through hole five on the limiting block (202) and the housing. The six through holes on the body (5) are connected to the sealing mechanism one (3) and the sealing mechanism two (4); the rotating block at the rear end of the rotating rod (201) is coaxially provided with the same limiting hole two on the limiting block (202); the card plate (203) is slidably installed on the rotating block at the rear end of the rotating rod (201), and the bottom end is provided with a limiting post corresponding to the limiting hole on the limiting block (202) and the limiting hole two on the rotating block; the rotating rod (201) is driven to rotate by the card plate (203), thereby controlling the sealing mechanism one (3) and the sealing mechanism two (4).

3. The easy-to-operate, labor-saving, high-sealing ball valve according to claim 2, characterized in that: The sealing mechanism (3) is also provided with a fixed frame (301) and a transmission wheel set (302); the fixed frame (301) is fixedly installed on the valve body (6); an airbag (305) is fixedly installed on the fixed frame (301), the airbag (305) is fixedly connected to the sealing ring (306), and the interior is connected; a lead screw (303) is rotatably installed on the fixed frame (301), and one end of the lead screw (303) is connected to the front end of the rotating rod (201) through the transmission wheel set (302); the front end of the rotating rod (201) is rotatably installed on the fixed frame (301); a pressure plate (304) corresponding to the airbag (305) is slidably installed on the lead screw (303).

4. The easy-to-operate, labor-saving, high-sealing ball valve according to claim 3, characterized in that: The sealing mechanism 2 (4) is also provided with a cam (401), a fixing plate (402), an airbag 2 (407) and a driving device; at least one of the cams (401) is fixedly installed on the front end of the rotating rod (201); the fixing plate (402) abuts against the cam (401); the two driving devices are symmetrically installed on the valve body (6) and are respectively fixedly connected to one end of the fixing plate (402); the airbag 2 (407) is located in the middle of the two driving devices and is fixedly connected to the two driving devices on the left and right sides respectively; the upper and lower ends of the airbag 2 (407) are respectively fixedly connected to the two sealing rings 2 (409) and are internally connected.

5. A labor-saving, high-sealing ball valve for easy opening and closing according to claim 4, characterized in that: The drive device is provided with a second fixed frame (404) and a cylinder (408); the second fixed frame (404) is fixedly installed on the valve body (6); a movable plate (403) is slidably installed on the upper end of the second fixed frame (404), a movable plate (406) is elastically slidably installed on the lower end, and a pressure plate (405) is slidably installed on the middle position; the upper end of the movable plate (403) is fixedly connected to the fixed plate (402), and the lower end is provided with an inclined surface, which is rotatably installed on the pressure plate (405). The cylinder (408) on the upper part abuts against the cylinder (408), and the cylinder (408) is moved closer to the airbag (407) by the moving plate (403); the upper end of the moving plate (406) is provided with an inclined surface that abuts against the cylinder (408), and the cylinder (408) is moved away from the airbag (407) by the moving plate (406); one end of the pressure plate (405) is fixedly connected to the airbag (407); the airbag (407) is squeezed and released by the movement of the pressure plate (405).

6. The easy-to-operate, labor-saving, high-sealing ball valve according to claim 1, characterized in that: The inner valve seat (102) has a drain hole a (1021), and the outer valve seat (103) has a drain hole b (1031). The drain holes a (1021) and b (1031) are simultaneously matched with the through holes on either side of the ball (101) to allow the liquid inside the valve core assembly to flow out.

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