A valve with foldable hand wheel

Abstract

The present invention discloses a valve with a foldable handwheel, comprising a valve body, a valve seat being fixedly connected to the bottom of the valve body, a mounting sleeve being connected to each other at the middle position of the top of the valve body, a splicing type folding mechanism being arranged on the inner side of the mounting sleeve, and the splicing type folding mechanism respectively comprises a valve stem, a hinge block, a semi-arc splicing plate, a semi-arc handwheel, a semi-arc splicing block, a U-shaped positioning piece and a trapezoidal protrusion; the present invention can obtain two groups of semi-arc splicing plates that can be movably unfolded above the valve stem through the structural coordination of the splicing type folding mechanism, and with the unfolding and retracting adjustment of the two groups of semi-arc splicing plates, the semi-arc handwheel and the semi-arc splicing block, the handwheel as a whole forms a semi-open separated splicing structure, so that when the handwheel is not working, it can be unfolded in half and fixed, so that not only does it not need to use special tools for frequent disassembly, but also the handwheel can be prevented from being twisted at will when not working.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a valve with a foldable hand wheel. Background Art

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. Valves are widely used in the industrial field. When opening the valve, a handwheel is usually used for operation. Since the existing handwheel is usually pressed onto the valve stem by a nut, in order to prevent the handwheel from being opened at will, the handwheel will be removed.

[0003] When the valve handwheel needs to be disassembled, not only does it require the use of tools to operate, but the disassembled handwheel is also inconvenient to carry, which increases the difficulty of disassembling the valve handwheel. During the installation of the valve, it is necessary to place it stably and select the most suitable installation height to ensure that the horizontal installation of the pipeline is more accurate. However, the valve is difficult to adjust the height, and the stability of the valve after adjustment is poor, which reduces the work efficiency of the pipeline installation. During the operation of the valve, the liquid flowing inside the valve will increase the pressure at the two sets of valve ports. Under the action of this pressure, the valve body is prone to shaking and vibrating, which causes the working state of the valve to be unstable and increases the loss of the valve. Summary of the invention

[0004] The object of the present invention is to provide a valve with a foldable hand wheel to solve the related problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a valve with a foldable hand wheel, comprising a valve body, a valve seat is fixedly connected to the bottom of the valve body, a mounting sleeve connected to each other is arranged at the middle position of the top of the valve body, a spliced ​​folding mechanism is arranged on the inner side of the mounting sleeve, and the spliced ​​folding mechanism respectively comprises a valve stem, a hinge block, a semi-arc splicing plate, a semi-arc hand wheel, a semi-arc splicing block, a U-shaped positioning piece and a trapezoidal protrusion, the valve stem sleeve is arranged on the inner side of the mounting sleeve, and hinge blocks are arranged at both ends of the top of the valve stem, and two sets of the hinge blocks are arranged on the inner side of the mounting sleeve. The outer side of the connecting block is hinged with a semi-arc splicing plate, and the tops of the two groups of semi-arc splicing plates are fixedly connected with semi-arc splicing blocks, and one end of the back side of one group of semi-arc splicing plates and semi-arc splicing blocks is provided with a trapezoidal protrusion, and one end of the front side of the other group of semi-arc splicing plates and semi-arc splicing blocks is provided with a trapezoidal groove that fits with the trapezoidal protrusion. The outer sides of the two groups of semi-arc splicing blocks are fixedly connected with semi-arc hand wheels, and the tops of the two groups of semi-arc splicing blocks are provided with four groups of positioning holes, and the inner sides of the two groups of positioning holes are provided with U-shaped positioning pieces that match each other;

[0006] Support and positioning mechanisms are provided at both ends of the top of the valve seat, and the support and positioning mechanisms respectively include positioning plates, positioning grooves, fixed platforms, positioning blocks, suction cups and springs. The positioning plates are divided into two groups, and the two groups of positioning plates are fixedly connected to the two ends of the top of the valve seat. The ends of the tops of the two groups of positioning plates that are close to each other are hinged with fixed platforms, and the tops of the two groups of fixed platforms are provided with positioning grooves. The ends of the two groups of semi-arc hand wheels that are away from each other are fixedly connected with positioning blocks, and the ends of the two groups of positioning blocks that are away from each other are evenly provided with suction cups and springs, and the suction cups and springs are elastically connected.

[0007] Preferably, lifting mechanisms are provided on both sides of the top of the valve seat, and the lifting mechanisms respectively include a first mounting groove, a movable rod, an I-shaped support, a bidirectional screw rod, an internal thread block, a second mounting groove, a rotating rod and a bevel gear set. The first mounting groove is divided into two groups, and the two groups of the first mounting grooves are fixedly connected to the two sides of the top of the valve seat. Both ends of the inside of the two groups of the first mounting grooves are sleeved with bidirectional screw rods, and the outer sides of the two groups of the bidirectional screw rods are symmetrically provided with thread-matching internal thread blocks, and the bottoms of the two groups of internal thread blocks on the same side are hinged with movable rods, and the bottoms of the two groups of the movable rods on the same side are provided with I-shaped supports, and a second mounting groove is provided at one end of the front side of the top of the valve seat, and rotating rods are sleeved on both sides of the inside of the second mounting groove, and meshing matching bevel gear sets are provided on both sides of the rotating rod and the end faces of the two groups of the two-way screw rods.

[0008] Preferably, mounting plates are fixedly connected to both sides of the valve seat, and the mounting plates are fixedly connected to the valve body, a limiting column is provided at the middle position of the bottom of the valve seat, and the bottom of the limiting column passes through the middle position inside the I-shaped support and is provided with a limiting disk.

[0009] Preferably, notches are provided at the tops of both ends of the installation sleeve, and the notches are adapted to fit the two sets of semi-arc splicing plates.

[0010] Preferably, the two groups of semi-arc splicing blocks are spliced ​​together to form an annular plate body, and the two groups of semi-arc hand wheels are spliced ​​together and combined with the semi-arc splicing blocks of the annular plate body to form an annular hand wheel.

[0011] Preferably, positioning posts are provided at both ends of the top of the valve body, and positioning rings cooperating with the positioning posts are provided at ends of the two sets of fixing platforms that are away from each other.

[0012] Preferably, a magnetic attraction layer is provided on the top of the two groups of positioning plates, a magnetic attraction plate having an opposite sex attraction to the magnetic attraction layer is provided on the bottom of the two groups of fixing platforms, and a cover plate is provided on the top of the two groups of positioning grooves.

[0013] Preferably, the two groups of positioning blocks correspond to the positions of the positioning grooves after being unfolded at an angle of °, and the inner sides of the two groups of positioning grooves are evenly paved with concave holes, and the concave holes are inserted into the suction cups for positioning.

[0014] Preferably, through openings are opened at the bottom of the two groups of the first mounting grooves and on both sides of the inside of the valve seat, and the two groups of the movable rods on the same side pass through the through openings and are movably connected to the I-shaped supports. Limiting grooves are provided at the tops of the two groups of the first mounting grooves, and the limiting grooves are slidably adapted to the internal threaded blocks.

[0015] Preferably, a turning handle is provided on one side of the turning rod, the two groups of bevel gear groups are respectively composed of two groups of first bevel gears and second bevel gears, the end faces of the two groups of bidirectional screw rods are provided with first bevel gears, and the outer side of the bevel gear group is provided with two groups of second bevel gears that mesh with the first bevel gears.

[0016] Compared with the prior art, the present invention provides a valve with a foldable hand wheel, which has the following beneficial effects:

[0017] 1. The present invention can obtain two sets of semi-arc splicing plates that can be movably unfolded above the valve stem through the structural coordination of the splicing type folding mechanism, and with the expansion and contraction adjustment of the two sets of semi-arc splicing plates, the semi-arc handwheel and the semi-arc splicing block, the handwheel as a whole forms a semi-open separated splicing structure, so that when the handwheel is not working, it can be unfolded in half and fixed. This not only eliminates the need to use special tools for frequent disassembly, but also prevents the handwheel from being twisted at will when not working, thereby increasing the folding function of the structure and the flexibility of use.

[0018] 2. The present invention utilizes the structural coordination of the splicing-type folding mechanism and the supporting positioning mechanism, so that the two groups of semi-arc splicing plates and the semi-arc handwheel after unfolding can drive the positioning block and the fixed platform structure to be positioned, and under the embedded insertion positioning of multiple groups of suction cups and positioning grooves, the stability of the semi-arc splicing plates after folding can be effectively guaranteed, and through the elastic connection of the spring and the suction cup, the folded semi-arc splicing plates are caused to form a balanced reinforcement structure on the side of the valve body, which not only enhances the stability of the working state of the valve body, but also can utilize the elastic buffering of the suction cup and the spring to absorb the vibration and shaking force of the valve body, thereby further enhancing the stable and stable effect of the valve body when in working state.

[0019] 3. The present invention can adjust the overall lifting and lowering of the valve body according to needs through the structural coordination of the lifting mechanism, so that the horizontal plane of the valve body valve port can be adjusted to the most suitable installation height of the pipeline, ensuring that the position of the connection and installation of the pipeline and the valve body is more accurate, and under the fitting positioning of the "J"-shaped support, the stability of the structural adjustment installation is improved. As the valve body is lifted and lowered as a whole, the folded semi-arc splicing plate and the fixed platform docking structure can be lifted and lowered in coordination, so that the side of the valve body in the lifting state can be assisted in balancing, further enhancing the stability of the valve during installation and operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of the present invention;

[0021] Figure 2 It is a front cross-sectional view of the present invention;

[0022] Figure 3 is a side cross-sectional view of the present invention;

[0023] Figure 4 It is the main view folding diagram of the present invention;

[0024] Figure 5 A top cross-sectional view of a first mounting groove and a second mounting groove of the present invention;

[0025] Figure 6 A top sectional view of the mounting sleeve of the present invention;

[0026] Figure 7 It is a three-dimensional diagram of the semi-arc hand wheel and the semi-arc splicing block of the present invention;

[0027] Figure 8 It is a three-dimensional diagram of two groups of semi-arc splicing plates of the present invention.

[0028] In the figure: 1. valve body; 2. valve seat; 3. lifting mechanism; 31. first mounting groove; 32. movable rod; 33. I-shaped support; 34. bidirectional screw rod; 35. internal thread block; 36. second mounting groove; 37. rotating rod; 38. bevel gear set; 4. support positioning mechanism; 41. positioning plate; 42. positioning groove; 43. fixed platform; 44. positioning block; 45. suction cup; 46. spring; 5. mounting sleeve; 51. fixing plate; 52. U-shaped plug rod; 53. limit plate; 54. positioning piece; 6. splicing folding mechanism; 61. valve stem; 62. hinge block; 63. semi-arc splicing plate; 64. semi-arc handwheel; 65. semi-arc splicing block; 66. U-shaped positioning piece; 67. trapezoidal protrusion; 68. trapezoidal groove; 69. positioning hole. DETAILED DESCRIPTION

[0029] 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.

[0030] See also Figure 1-8The present invention provides a technical solution: a valve with a foldable hand wheel, comprising a valve body 1, a valve seat 2 is fixedly connected to the bottom of the valve body 1, a mounting sleeve 5 is provided at the middle position of the top of the valve body 1, and the mounting sleeve 5 is provided with a spliced ​​folding mechanism 6 on the inner side, and the spliced ​​folding mechanism 6 includes a valve stem 61, a hinge block 62, a semi-arc splicing plate 63, a semi-arc hand wheel 64, a semi-arc splicing block 65, a U-shaped positioning member 66 and a trapezoidal protrusion 67, the valve stem 61 is sleeved on the inner side of the mounting sleeve 5, and the two ends of the top of the valve stem 61 are provided with hinge blocks 62, and the outer ends of the two sets of hinge blocks 62 are connected to the valve stem 61. A semi-arc splicing plate 63 is hinged on the side, and a semi-arc splicing block 65 is fixedly connected to the top of the two groups of semi-arc splicing plates 63. A trapezoidal protrusion 67 is provided at one end of the back of one group of semi-arc splicing plates 63 and semi-arc splicing blocks 65, and a trapezoidal groove 68 that fits with the trapezoidal protrusion 67 is provided at one end of the front of the other group of semi-arc splicing plates 63 and semi-arc splicing blocks 65. Semi-arc hand wheels 64 are fixedly connected to the outer sides of the two groups of semi-arc splicing blocks 65. Four groups of positioning holes 69 are provided on the tops of the two groups of semi-arc splicing blocks 65, and U-shaped positioning pieces 66 that match each other are provided on the inner sides of the two groups of positioning holes 69.

[0031] A supporting positioning mechanism 4 is provided at both ends of the top of the valve seat 2, and the supporting positioning mechanism 4 comprises a positioning plate 41, a positioning groove 42, a fixing platform 43, a positioning block 44, a suction cup 45 and a spring 46 respectively. The positioning plate 41 is divided into two groups, and the two groups of positioning plates 41 are fixedly connected to the two ends of the top of the valve seat 2. The ends of the tops of the two groups of positioning plates 41 close to each other are hinged with a fixing platform 43, and the tops of the two groups of fixing platforms 43 are provided with positioning grooves 42. The ends of the two groups of semi-arc hand wheels 64 away from each other are fixedly connected with positioning blocks 44, and the ends of the two groups of positioning blocks 44 away from each other are evenly provided with suction cups 45 and springs 46, and the suction cups 45 and the springs 46 are elastically connected.

[0032] As a preferred solution of this embodiment: a lifting mechanism 3 is provided on both sides of the top of the valve seat 2, and the lifting mechanism 3 respectively includes a first mounting groove 31, a movable rod 32, an I-shaped support 33, a bidirectional screw rod 34, an internal thread block 35, a second mounting groove 36, a rotating rod 37 and a bevel gear set 38. The first mounting groove 31 is divided into two groups, and the two groups of first mounting grooves 31 are fixedly connected to the two sides of the top of the valve seat 2. The two ends of the two groups of first mounting grooves 31 are sleeved with bidirectional screw rods 34, and the outer sides of the two groups of bidirectional screw rods 34 are symmetrically provided with thread-matching internal thread blocks 35. The bottoms of the two groups of internal thread blocks 35 on the same side are hinged with movable rods 32, and the bottoms of the two groups of movable rods 32 on the same side are provided with I-shaped supports 33. A second mounting groove 36 is provided at one end of the front side of the top of the valve seat 2, and rotating rods 37 are sleeved on both sides of the second mounting groove 36. The two sides of the rotating rod 37 and the end faces of the two groups of bidirectional screw rods 34 are provided with meshing matching bevel gear sets 38.

[0033] As a preferred solution of this embodiment: mounting plates are fixedly connected to both sides of the valve seat 2, and the mounting plates are fixedly connected to the valve body 1, a limit column is provided at the middle position of the bottom of the valve seat 2, and the bottom of the limit column passes through the middle position inside the "J"-shaped support 33 and is provided with a limit plate, so that the "J"-shaped support 33 can be raised and lowered for limit guidance through the cooperation of the limit column and the limit plate.

[0034] As a preferred solution of this embodiment: notches are provided at the tops of both ends of the mounting sleeve 5, and the notches are adapted to the two sets of semi-arc splicing plates 63. By opening the notches, the semi-arc splicing plates 63 can be folded to a maximum of 90° to increase the limiting effect of the structure.

[0035] As a preferred solution of this embodiment: two groups of semi-arc splicing blocks 65 are spliced ​​together to form an annular plate body, and two groups of semi-arc hand wheels 64 are spliced ​​together and combined with the semi-arc splicing blocks 65 of the annular plate body to form an annular hand wheel, so that the hand wheel structure can be a semi-open separation splicing structure, which is convenient for separating and folding the hand wheel.

[0036] As a preferred solution of this embodiment: positioning columns are provided at both ends of the top of the valve body 1, and positioning rings that cooperate with the positioning columns are provided at the ends of the two sets of fixed platforms 43 that are away from each other. The fixed platforms can be rotated and adjusted and hung on the positioning columns through the positioning rings, so that the structure can be folded and contracted, which is convenient for displaying it when needed.

[0037] As a preferred solution of this embodiment: a magnetic attraction layer is provided on the top of the two groups of positioning plates 41, a magnetic attraction plate with opposite attraction to the magnetic attraction layer is provided on the bottom of the two groups of fixing platforms 43, and a cover plate is provided on the top of the two groups of positioning grooves 42, so as to facilitate fixing the movable and adjustable fixing platform 43 on the surface of the positioning plate 41 through the magnetic attraction structure.

[0038] As a preferred solution of this embodiment: the two groups of positioning blocks 44 are unfolded at 90 degrees to correspond to the positions of the positioning grooves 42, the inner sides of the two groups of positioning grooves 42 are evenly covered with concave holes, and the concave holes are inserted into the suction cups 45 for positioning, and the structural cooperation of the concave holes and the suction cups 45 can be utilized to make the fixation of the positioning blocks 44 unfolded at 90 degrees and the positioning grooves 42 more stable.

[0039] As a preferred solution of this embodiment: through openings are opened at the bottom of the two groups of first mounting grooves 31 and the two sides inside the valve seat 2, and the two groups of movable rods 32 on the same side pass through the through openings to be movably connected with the "J"-shaped support 33. Limiting grooves are provided on the tops of the two groups of first mounting grooves 31, and the limiting grooves are slidably matched with the internal thread blocks 35. The internal thread blocks 35 can be forced to move horizontally through the guiding cooperation of the limiting grooves, and the opening of the through openings is used to provide an entrance for the movable rods 32 to extend downward, so that the "J"-shaped support 33 below can be driven to move up and down by the movable rods 32.

[0040] As a preferred solution of this embodiment: a turning handle is provided on one side of the turning rod 37, and the two sets of bevel gear groups 38 are respectively composed of two sets of first bevel gears and second bevel gears. The end faces of the two sets of bidirectional screw rods 34 are provided with first bevel gears, and the outer sides of the bevel gear groups 38 are provided with two sets of second bevel gears that mesh with the first bevel gears. The linkage cooperation of the two sets of bevel gear groups 38 can be utilized to enable one set of turning rods 37 to simultaneously drive the two sets of bidirectional screw rods 34 to rotate, thereby driving the "X"-shaped support 33 to rise and fall.

[0041] Embodiment 1, as Figure 1-5 As shown, when the valve pipeline is installed, the rotating rod 37 can be manually rotated to drive the two sets of bevel gear sets 38 to work in linkage, forcing the bevel gear sets 38 to simultaneously drive the two sets of bidirectional screw rods 34 to rotate. As the bidirectional screw rods 34 rotate, the two sets of internal thread blocks 35 on the same side can be displaced away from each other, and the internal thread blocks 35 can drive the movable rod 32 to move and expand, so that the "J"-shaped support 33 can rise as the movable rod 32 is expanded. At this time, the overall height of the valve body 1 can be adjusted, so that the valve ports at both ends of the valve body 1 correspond to the pipeline ports to be installed, so as to obtain the most suitable installation height for the pipeline. During the installation, the staff can step on the surface of the "J"-shaped support 33 to further improve the overall stability of the valve body 1 and increase the accuracy of pipeline installation.

[0042] Embodiment 2, as Figure 2-3 and Figure 6 As shown, fixing plates 51 are fixedly connected to both sides of the top of the installation sleeve 5, and U-shaped plug rods 52 are inserted into the two sets of fixing plates 51. Limiting plates 53 are provided in the middle positions of both ends of the installation sleeve 5, and a positioning piece 54 is provided in the middle position of one side of the inside of the U-shaped plug rod 52. When the hand wheel needs to be folded, the locking positioning of the positioning piece 54 on the U-shaped plug rod 52 can be first canceled, and then the U-shaped plug rod 52 can be pulled out from the two sets of fixing plates 51, thereby opening the limit of the two sets of semi-arc splicing plates 63 inside the installation sleeve 5, and then the hand wheel can be folded. The semi-arc splicing plate 63 is folded and unfolded under the movement of the hinge block 62, and the limiting plate 53 is used to assist in positioning the maximum unfolded position, so that the semi-arc splicing plate 63 is unfolded at 90°. At this time, the U-shaped plug rod 52 can be inserted into the two sets of fixed plates 51 again, so as to limit the upper part of the folded semi-arc splicing plate 63, and then locked and positioned by the positioning piece 54, so as to ensure that the folded semi-arc splicing plate 63 will not shake or loosen, thereby further improving the stability of the folding adjustment of the structure.

[0043] Working principle: After the valve body 1 is installed and operated as a whole, the U-shaped positioning piece 66 can be removed to fix the positioning holes 69 above the two groups of semi-arc splicing plates 63. At this time, the two groups of semi-arc splicing plates 63 can be separated, and the two groups of semi-arc splicing plates 63 can drive the semi-arc splicing blocks 65 and the semi-arc handwheels 64 to form a semi-open structure with the hinge block 62 as the active point and expand outward at 90°, so that the two groups of semi-arc splicing plates 63, the semi-arc handwheels 64 and the semi-arc splicing blocks 65 can be folded, and the folded semi-arc splicing plates 63 cannot drive the valve stem 61 to rotate, so that the handwheel structure cannot be used after being folded, and during this period, the fixed platform 43 can be moved and the positioning plate 41 can be sucked and positioned. , so that the fixing platform 43 is fixed in a horizontal plane, and then the folded semi-arc splicing plate 63 drives the positioning block 44 on the side of the semi-arc hand wheel 64 to be close to the positioning groove 42, so that the suction cups 45 on the bottom surfaces of the two sets of folded positioning blocks 44 are embedded in the positioning groove 42 for suction and fixation. At this time, the folded semi-arc splicing plate 63 can form a reinforcement structure on the two sides of the valve body 1, thereby increasing the stability of the working state of the valve body 1. The pressure vibration suffered by the valve body 1 during operation can be absorbed and alleviated by the elastic connection of the two sets of springs 46 on the side and the suction cup 45, thereby reducing the damage suffered by the valve body 1 during operation and improving the stability of the use of the valve body 1.

[0044] When it is necessary to perform handwheel adjustment on the valve body 1, the suction fixation of the suction cups 45 and the positioning grooves 42 of the two sets of positioning blocks 44 can be cancelled, and then the two sets of semi-arc splicing plates 63 can be retracted inwardly with the hinge block 62 as the active point. During this period, the trapezoidal protrusions 67 on the side of one set of semi-arc splicing plates 63 will gradually embed into the inner side of the trapezoidal grooves 68 opened on the side of the other set of semi-arc splicing plates 63, forming an auxiliary clamping positioning structure to ensure the tightness of the two sets of semi-arc splicing plates 63 being retracted and integrated. As the two sets of semi-arc splicing plates 63 are completely retracted and the semi-arc splicing blocks 65 are positioned with the positioning holes 69, the semi-open structure of the semi-arc handwheel 64 and the semi-arc splicing blocks 65 form a complete annular system to form a handwheel structure. At this time, the two sets of integrated semi-arc handwheels 64, the semi-arc splicing blocks 65 and the semi-arc splicing plates 63 can be rotated to drive the valve stem 61 to rotate, so as to perform adjustment work on the valve body 1.

[0045] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A valve with a foldable hand wheel, comprising a valve body (1), characterized in that: The bottom of the valve body (1) is fixedly connected to a valve seat (2); a mounting sleeve (5) which is interconnected is provided at a middle position of the top of the valve body (1); a spliced ​​folding mechanism (6) is provided on the inner side of the mounting sleeve (5); and the spliced ​​folding mechanism (6) comprises a valve stem (61), a hinge block (62), a semi-arc splicing plate (63), a semi-arc hand wheel (64), a semi-arc splicing block (65), a U-shaped positioning member (66) and a trapezoidal protrusion (67); the valve stem (61) is sleeved on the inner side of the mounting sleeve (5); hinge blocks (62) are provided at both ends of the top of the valve stem (61); and the outer sides of two groups of the hinge blocks (62) are hingedly connected to the semi-arc splicing plates (63). 3) The tops of the two groups of semi-arc splicing plates (63) are fixedly connected with semi-arc splicing blocks (65); one end of the back of one group of the semi-arc splicing plates (63) and the semi-arc splicing blocks (65) is provided with a trapezoidal protrusion (67); the front ends of the other group of the semi-arc splicing plates (63) and the semi-arc splicing blocks (65) are provided with a trapezoidal groove (68) that fits with the trapezoidal protrusion (67); the outer sides of the two groups of the semi-arc splicing blocks (65) are fixedly connected with semi-arc hand wheels (64); the tops of the two groups of the semi-arc splicing blocks (65) are provided with four groups of positioning holes (69); the inner sides of the two groups of the positioning holes (69) are provided with U-shaped positioning pieces (66) that fit with each other; A supporting positioning mechanism (4) is provided at both ends of the top of the valve seat (2), and the supporting positioning mechanism (4) comprises a positioning plate (41), a positioning groove (42), a fixing platform (43), a positioning block (44), a suction cup (45) and a spring (46), the positioning plate (41) is provided in two groups, the two groups of positioning plates (41) are fixedly connected to both ends of the top of the valve seat (2), the tops of the two groups of positioning plates (41) close to each other are hingedly connected to the fixing platform (43), the tops of the two groups of fixing platforms (43) are provided with a positioning groove (42), the ends of the two groups of semi-arc hand wheels (64) away from each other are fixedly connected to the positioning blocks (44), the ends of the two groups of positioning blocks (44) away from each other are evenly provided with suction cups (45) and springs (46), and the suction cups (45) and the springs (46) are elastically connected, Wherein: the two groups of positioning blocks (44) are unfolded at 90 degrees to correspond to the positions of the positioning grooves (42); the inner sides of the two groups of positioning grooves (42) are evenly provided with concave holes, and the concave holes are inserted into the suction cups (45) for positioning.

2. A valve with a foldable hand wheel according to claim 1, characterized in that: A lifting mechanism (3) is provided on both sides of the top of the valve seat (2), and the lifting mechanism (3) comprises a first mounting groove (31), a movable rod (32), an I-shaped support (33), a bidirectional screw rod (34), an internal thread block (35), a second mounting groove (36), a rotating rod (37) and a bevel gear set (38), wherein the first mounting groove (31) is divided into two groups, and the two groups of the first mounting grooves (31) are fixedly connected to both sides of the top of the valve seat (2), and the two ends of the inside of the two groups of the first mounting grooves (31) are sleeved with the bidirectional screw rod (34), and the two groups of The outer side of the bidirectional screw rod (34) is symmetrically provided with an internal thread block (35) with thread matching, the bottom of the two groups of the internal thread blocks (35) on the same side are hinged with a movable rod (32), and the bottom of the two groups of the movable rods (32) on the same side are provided with a "J"-shaped support (33), and a second mounting groove (36) is provided at one end of the front side of the top of the valve seat (2), and rotating rods (37) are sleeved on both sides of the inside of the second mounting groove (36), and the two sides of the rotating rod (37) and the end faces of the two groups of bidirectional screw rods (34) are provided with a meshing matching bevel gear set (38).

3. A valve with a foldable hand wheel according to claim 1, characterized in that: Mounting plates are fixedly connected to both sides of the valve seat (2), and the mounting plates are fixedly connected to the valve body (1). A limiting column is provided at the middle position of the bottom of the valve seat (2), and the bottom of the limiting column passes through the middle position inside the "J"-shaped support (33) and is provided with a limiting disk.

4. A valve with a foldable hand wheel according to claim 1, characterized in that: Notches are provided at the tops of both ends of the installation sleeve (5), and the notches are adapted to fit the two sets of semi-arc splicing plates (63).

5. The valve with a foldable hand wheel according to claim 1, characterized in that: The two groups of semi-arc shaped splicing blocks (65) are spliced ​​together to form an annular plate body, and the two groups of semi-arc shaped hand wheels (64) are spliced ​​together to form an annular hand wheel in combination with the semi-arc shaped splicing blocks (65) of the annular plate body.

6. A valve with a foldable hand wheel according to claim 1, characterized in that: Positioning columns are provided at both ends of the top of the valve body (1), and positioning rings cooperating with the positioning columns are provided at ends of the two sets of fixing platforms (43) that are away from each other.

7. A valve with a foldable hand wheel according to claim 1, characterized in that: A magnetic attraction layer is provided on the top of the two groups of positioning plates (41), a magnetic attraction plate having an opposite polarity to the magnetic attraction layer is provided on the bottom of the two groups of fixing platforms (43), and a cover plate is provided on the top of the two groups of positioning grooves (42).

8. The valve with a foldable hand wheel according to claim 2, characterized in that: Through openings are provided at the bottom of the two groups of the first mounting grooves (31) and at both sides of the inside of the valve seat (2), and the two groups of the movable rods (32) on the same side pass through the through openings to be movably connected to the cross-shaped support (33). Limiting grooves are provided at the tops of the two groups of the first mounting grooves (31), and the limiting grooves are slidably matched with the internal thread block (35).

9. The valve with a foldable hand wheel according to claim 2, characterized in that: A turning handle is provided on one side of the turning rod (37); the two sets of bevel gear sets (38) are respectively composed of two sets of first bevel gears and second bevel gears; the end surfaces of the two sets of bidirectional screw rods (34) are provided with first bevel gears; and the outer sides of the bevel gear sets (38) are provided with two sets of second bevel gears that mesh with the first bevel gears.

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