Floating ball valve for cleaning middle cavity

Abstract

The floating type ball valve comprises a valve body, a valve cover, a valve rod and a ball body, the middle cavity is formed in the valve body, the ball body is arranged in the middle cavity, the valve cover is installed on the valve body, the valve body penetrates through the valve cover and extends into the middle cavity to be in linkage connection with the ball body, and the positions, corresponding to the two sides of the ball body, in the middle cavity are each provided with a valve seat; a handle is mounted at the upper end of the valve rod; the valve rod is provided with an inlet channel, the valve cover is provided with an outlet channel communicated with the middle cavity, the safe opening and closing device is arranged between the inlet channel and the outlet channel, and the valve rod and the safe opening and closing device form linkage, so that when the valve rod drives the ball body to move to a closing position, the ball body is closed. The inlet channel is communicated with the outlet channel, when the valve rod drives the ball to move to the opening position, the inlet channel and the outlet channel are blocked, and the cleaning device is arranged at the inner end of the outlet channel. Cleaning operation is only allowed when the valve is closed, pipeline medium pollution can be avoided, and operation is safer.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, in particular to a floating ball valve with a cleaned middle cavity. Background Art

[0002] Ball valves currently used in the nuclear power, oil, and gas industries are typically traditional one-piece (top-entry), two-piece, or three-piece structures. The valve opens and closes by rotating the ball through the valve stem / shaft. Ball valves are designed for their compact size, light weight, excellent flow, reliable sealing, simple structure, and ease of maintenance. However, over time, when used with foreign matter, impurities, or coking media, these traditional ball valves can easily become trapped within the ball valve cavity. This can cause wear or scratching between the ball and seat seal, as well as between the stem and bearing, during the opening and closing process. This shortens the valve's service life and impacts the operation of the process system in which the valve is installed.

[0003] The utility model patent with application number CN202111316880.X discloses a cleaning ball valve, including a valve cover, a valve body, an upper cavity, and a lower cavity. It is characterized in that a cleaning flange is installed at the bottom of the valve cover, a cleaning inlet is provided on the valve cover, a concave step is provided on the cleaning flange, and the concave step and the valve cover form a cleaning medium channel. A through hole is provided on the concave step, and the through hole corresponds to the spherical surface of the upper cavity. A sewage outlet is provided at the bottom of the valve body.

[0004] However, in this structure, the cleaning inlet, cleaning medium channel, and the central cavity of the valve body are always connected, regardless of whether the valve is open or closed. Performing a cleaning operation while the valve is open not only contaminates the medium but can also lead to excessive internal pressure, causing a backflow of the medium and potentially causing an accident. Therefore, it is necessary to improve the existing ball valve cleaning structure. Summary of the Invention

[0005] The object of the present invention is to provide a floating ball valve with a clean center cavity. The present invention allows cleaning operations only when the valve is closed, which not only avoids pipeline medium contamination but also makes operation safer.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a floating ball valve with a clean center cavity, comprising a valve body, a valve cover, a valve stem, and a ball, wherein the valve body is provided with a center cavity, the ball is disposed in the center cavity, the valve cover is mounted on the upper end of the valve body, the valve body penetrates the valve cover, extends into the center cavity, and is linked to the ball, a valve seat is provided at positions on both sides of the center cavity corresponding to the ball, for sealing with the ball when the valve is closed, and a handle is mounted on the upper end of the valve stem in a circumferentially linked manner; the valve valve also includes a safety opening and closing device and a cleaning device, wherein the valve stem is provided with an inlet channel, the valve cover is provided with an outlet channel communicating with the center cavity, the safety opening and closing device is disposed between the inlet channel and the outlet channel, and the valve stem and the safety opening and closing device are linked to each other so that when the valve stem drives the ball to move to a closed position, the inlet channel and the outlet channel are connected, and when the valve stem drives the ball to move to an open position, the inlet channel and the outlet channel are blocked, and the cleaning device is disposed at one end of the outlet channel near the center cavity, for spraying a medium to clean the center cavity.

[0007] By adopting the above technical solution, the valve stem and the safety opening and closing device can be linked. When the valve stem is in the open position or the closed position, the safety opening and closing position blocks or connects the inlet channel and the outlet channel, thereby allowing cleaning operations only when the valve is closed. The cleaning medium can be gas purge or liquid flushing. This design not only avoids pipeline medium contamination, but also makes operation safer.

[0008] The present invention is further configured as follows: the safety opening and closing device includes a mounting seat, an opening and closing valve disc, a guide block, a linkage bead, a reset spring and a rubber plug; a mounting cavity connected to the inlet channel and the outlet channel is provided in the valve cover; the mounting seat is arranged in the mounting cavity; an outer hole, a middle hole and an inner hole that are interconnected are provided on the mounting seat in sequence along the axial direction; a sealing step is formed between the middle hole and the inner hole; the mounting seat includes an outer shaft segment and an inner shaft segment; the outer circular surface of the outer shaft segment fits tightly with the inner wall of the mounting cavity; an outer shaft annular groove is provided on the outer periphery of the outer shaft segment; the outer shaft annular groove is connected to the outlet channel, and the outer shaft annular groove is connected to the middle hole through a plurality of outer guide holes; a flow gap is formed between the outer circular surface of the inner shaft segment and the inner circular surface of the mounting cavity; and a plurality of interconnected inner holes are distributed in a circular array on the inner shaft segment. The inner guide hole of the hole and the flow clearance, the rubber plug is installed in the outer hole, the opening and closing valve disc is slidably arranged in the middle hole, and the outer circular surface of the opening and closing valve disc is provided with a plurality of first guide grooves extending along the axial direction, the reset spring is clamped in the rubber plug and the opening and closing valve disc, the guide block and the linkage bead are slidably arranged in the inner hole, and the outer circular surface of the guide block is provided with a plurality of second guide grooves extending along the axial direction; the outer periphery of the valve stem is provided with an arc-shaped track groove with the same depth, one end of the arc-shaped track groove is connected to the outer circular surface of the valve stem through a transmission inclined surface, and the linkage bead partially extends into the arc-shaped track groove; when the ball is in the unclosed position, the linkage bead is in the arc-shaped track groove, and the opening and closing valve disc is pressed against the sealing step. When the ball is in the closed position, the linkage bead rolls to the outer circular surface of the valve stem and pushes the guide block to prompt the opening and closing valve disc to leave the sealing step.

[0009] By adopting this technical solution, when the valve is in the open state, the linkage bead embeds in the arc-shaped trajectory groove, and the opening and closing valve disc, under the action of the return spring, presses against the sealing step, closing the inlet and outlet channels. When the valve is in the closed state, the linkage bead is pushed into the inner hole by the side of the valve stem, simultaneously pushing the guide block, causing the opening and closing valve disc to disengage from the sealing step. At this time, the medium enters the middle cavity through the inlet channel, the flow gap, the inner hole, the middle hole, the outer guide hole, the outer shaft annular groove, and the outlet channel, thereby cleaning the middle cavity. This highly ingenious structure eliminates the need for additional operating mechanisms to operate the safety opening and closing device, making it very convenient to use.

[0010] The present invention is further configured such that the safety opening and closing device also includes a hexagonal stud, the outer end of the valve cover is provided with a mounting screw hole connected to the mounting cavity, the inner wall of the mounting cavity is provided with a limiting step, the hexagonal stud is threadedly connected to the mounting screw hole, and the inner end of the hexagonal stud presses the rubber plug into the outer hole, prompting the inner end of the outer shaft segment to press against the limiting step, and the outer circumferential surface of the outer shaft segment corresponding to the inner and outer sides of the outer shaft annular groove are respectively provided with a first sealing ring for sealing with the inner wall of the mounting cavity.

[0011] By adopting the above technical solution, the safety opening and closing device can be quickly installed, the installation structure is simple and reliable, and the sealing performance is good.

[0012] The present invention is further configured such that the inlet channel includes an axial flow hole extending axially from the upper end of the valve stem, a first annular confluence groove arranged on the outer periphery of the valve stem, and a plurality of runoff holes distributed in a circular array connecting the axial flow hole with the first annular confluence groove, and the first annular confluence groove is connected to the mounting cavity.

[0013] By adopting the above technical solution, no matter what angle the valve stem is relative to the safety opening and closing device, the inlet channel can be connected to the installation cavity, without the need for an additional positioning structure, thereby facilitating assembly operations.

[0014] The present invention is further configured as follows: an annular mounting groove is provided on the inner end surface of the valve cover; the cleaning device includes a mounting ring installed in the annular mounting groove and a guide ring connected to the mounting ring; a plurality of spray bosses are provided at the lower end of the guide ring; a first annular cavity and a second annular cavity are axially provided in the guide ring; a first through hole for connecting the outlet channel and the first annular cavity is provided at the upper end of the guide ring; and a second sealing ring for sealing with the inner end surface of the annular mounting groove is provided at positions corresponding to the inner and outer sides of the first through hole at the upper end of the guide ring; a plurality of second through holes are distributed in a circumferential array between the first annular cavity and the second annular cavity; a plurality of outlet grooves corresponding to the spray bosses are provided at the lower end of the second annular cavity; and a plurality of spray holes extending to the outer ends of the corresponding spray bosses are provided at the inner ends of the outlet grooves.

[0015] By adopting the above technical solution, through the structure of two annular cavities and multiple second through holes, the effect of uniform distribution of medium pressure in multiple spray holes can be achieved, avoiding the situation where the pressure of the spray holes close to the first through hole position is too high and the pressure of the spray holes far away from the first through hole position is too low, which is conducive to ensuring good cleaning effect in various parts.

[0016] The present invention is further configured such that the cleaning device also includes multiple sets of locking nuts and spray heads, the locking nuts are threadedly engaged with the corresponding spray bosses, and the corresponding spray heads are pressed tightly onto the spray bosses, the upper end of the spray heads are provided with multiple inclined holes connected to the spray holes, and the multiple inclined holes are gradually arranged close to each other from top to bottom, the upper end of the spray heads are also provided with multiple positioning protrusions, and the lower end of the spray bosses is provided with multiple positioning grooves that fit with the positioning protrusions.

[0017] By adopting the above technical solution and adding a spray head, the sprayed medium is guided in a direction close to each other. At the moment when multiple medium streams are sprayed out of the spray head outlet, the multiple medium streams collide with each other and scatter, which can increase the cleaning area and improve the cleaning effect.

[0018] The present invention is further configured such that the mounting ring is welded in the annular mounting groove, a plurality of locking protrusions are provided on the inner circumferential surface of the guide ring, and a plurality of locking grooves are provided on the outer circumferential surface of the mounting ring that cooperate with the locking protrusions, the locking groove comprising a vertical slide groove portion extending upward from the lower end of the mounting ring and an arcuate slide groove portion extending from the vertical slide groove portion along the circumference of the mounting ring, the width of the arcuate slide groove portion gradually decreasing, and when the locking protrusion is located at one end of the arcuate slide groove portion close to the vertical slide groove portion, the locking protrusion and the arcuate slide groove portion are clearance-fitted, and when the locking protrusion is located at one end of the arcuate slide groove portion away from the vertical slide groove portion, the locking protrusion and the arcuate slide groove portion are interference-fitted.

[0019] By adopting the above technical solution, when installing the guide ring, the guide ring can be installed by using two actions of "pushing up + circumferential rotation". When disassembling, the reverse operation can be performed, which is very convenient to operate.

[0020] The present invention is further configured to include a safety dial button, an adjustment groove is provided at the upper end of the inlet channel, a first positioning recess and a second positioning recess in the shape of a semi-ellipsoid are vertically provided in the adjustment groove, the safety dial button is inserted into the adjustment groove, and a positioning protrusion with a semi-ellipsoidal cross-section is provided on the side of the safety dial button. When the safety dial button slides vertically, the positioning protrusion has a first position that fits with the first positioning recess and a second position that fits with the second positioning recess, and a vertical groove for guiding the positioning protrusion is provided between the first positioning recess and the second positioning recess, and the depth of the vertical groove is less than that of the first positioning recess The depth of the second positioning recess, the safety dial button is vertically provided with an axial hole connected to the inlet channel, the upper end of the axial hole is threadedly connected with a screw plug; the handle is sleeved on the outer periphery of the valve stem, the position of the valve stem corresponding to the lower end of the handle is clamped with a retaining spring, the position of the valve stem corresponding to the upper end of the handle is threadedly connected with a pressure cover, the pressure cover and the retaining spring constitute an axial limit for the handle, the upper end of the handle is provided with a locking rod, and the safety dial button is provided with a locking groove, when the positioning protrusion is in the first position, the locking rod is engaged with the locking groove, and when the positioning protrusion is in the second position, the locking rod is separated from the locking groove.

[0021] By adopting the above technical solution, when the valve is used normally, the safety dial button is pulled up, at this time the positioning protrusion is in the first position, and the locking groove on the safety dial button and the locking rod on the handle are in a separated state, and the handle can rotate freely; when the middle cavity needs to be cleaned, first operate the handle to close the valve, and then press down the safety dial button, at this time the positioning protrusion is in the second position, and the locking rod on the handle is inserted into the locking groove of the safety dial button, the handle is locked, and the valve cannot be opened, then the screw plug is unscrewed, the external pipeline is connected, and the medium is introduced to clean the middle cavity of the valve. During the cleaning process, there is no need to worry about the valve opening accidentally, which greatly improves the safety of operation.

[0022] The present invention is further configured such that a drain hole is provided at the bottom of the valve body, and a threaded plug is threadedly connected to the outer end of the drain hole.

[0023] By adopting the above technical solution, sewage can be discharged through the bottom of the valve, avoiding the accumulation of stains in the middle cavity after cleaning.

[0024] The present invention is further configured such that a fireproof ring is sandwiched between the valve seat and the inner wall of the valve body, the fireproof ring is provided with a plurality of positioning holes, and the valve seat is provided with a plurality of positioning protrusions that fit with the positioning holes.

[0025] By adopting the above technical solution, it can be ensured that the valve can still maintain effective sealing under high temperature or fire conditions, preventing large-scale leakage of flammable media and ensuring the safe operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of the valve of the present invention when it is open; Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle part A; Figure 3 It is a structural schematic diagram of the safety opening and closing device of the present invention; Figure 4 for Figure 1 A schematic diagram of the enlarged structure of the middle part B; Figure 5 An exploded view of the cleaning device of the present invention; Figure 6 for Figure 1 Schematic diagram of the enlarged structure of the middle C part; Figure 7 This is a schematic structural diagram of the safety dial button of the present invention; Figure 8 This is a schematic diagram of the overall structure of the valve of the present invention when it is closed; Figure 9 for Figure 8 The enlarged structural diagram of the middle D part; Figure 10 for Figure 8 The enlarged structural diagram of the middle E part; Figure 11 for Figure 8 Schematic diagram of the enlarged structure of part F in the middle.

[0027] Figure: 1, valve body; 2, valve cover; 3, valve stem; 4, ball; 5, middle cavity; 6, valve seat; 7, handle; 8, safety opening and closing device; 9, cleaning device; 10, inlet channel; 11, outlet channel; 12, mounting seat; 13, opening and closing valve disc; 14, guide block; 15, linkage ball; 16, return spring; 17, rubber plug; 18, mounting cavity; 19, outer hole; 20, middle hole; 21, inner hole; 22 , sealing step; 23, outer shaft section; 24, inner shaft section; 25, outer shaft annular groove; 26, outer guide hole; 27, flow clearance; 28, inner guide hole; 29, first guide groove; 30, second guide groove; 31, arc track groove; 32, transmission inclined surface; 33, inner hexagonal stud; 34, mounting screw hole; 35, limit step; 36, first sealing ring; 37, axial flow hole; 38, first annular confluence groove; 39, diameter Flow hole; 40, annular mounting groove; 41, mounting ring; 42, guide ring; 43, spray boss; 44, first annular cavity; 45, second annular cavity; 46, first through hole; 47, second sealing ring; 48, second through hole; 49, outlet groove; 50, spray hole; 51, locking nut; 52, spray head; 53, inclined hole; 54, positioning protrusion; 55, positioning groove; 56, locking protrusion; 57, locking groove; 58. Vertical slide groove portion; 59. Arc-shaped slide groove portion; 60. First positioning recess; 61. Second positioning recess; 62. Positioning protrusion; 63. Vertical groove; 64. Axial hole; 65. Screw plug; 66. Retaining spring; 67. Pressure cover; 68. Locking rod; 69. Locking groove; 70. Drain hole; 71. Threaded plug; 72. Fire ring; 73. Positioning hole; 74. Positioning protrusion; 75. Safety dial button; 76. Adjustment groove. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0029] Example: As shown in the attached Figures 1 to 11The floating ball valve with a cleaned middle cavity shown in the figure comprises a valve body 1, a valve cover 2, a valve stem 3 and a ball 4. The valve body 1 is provided with a middle cavity 5, the ball 4 is arranged in the middle cavity 5, the valve cover 2 is mounted on the upper end of the valve body 1, the valve body 1 penetrates the valve cover 2 and extends into the middle cavity 5 and is linked to the ball 4. A valve seat 6 for forming a sealing fit with the ball 4 when the valve is closed is also provided at the position corresponding to both sides of the ball 4 in the middle cavity 5. The upper end of the valve stem 3 is circumferentially linked with a handle 7; a safety opening and closing device 8 and a cleaning device 9 are also included. The valve stem 3 is provided with a There is an inlet channel 10, and the valve cover 2 is provided with an outlet channel 11 connected to the middle cavity 5. The safety opening and closing device 8 is arranged between the inlet channel 10 and the outlet channel 11, and the valve stem 3 and the safety opening and closing device 8 form a linkage, so that when the valve stem 3 drives the ball 4 to move to the closed position, the inlet channel 10 and the outlet channel 11 are connected, and when the valve stem 3 drives the ball 4 to move to the open position, the inlet channel 10 and the outlet channel 11 are blocked. The cleaning device 9 is arranged at one end of the outlet channel 11 close to the middle cavity 5, and is used to spray the medium to clean the middle cavity 5. The valve stem 3 and the safety opening and closing device 8 can form a linkage. When the valve stem 3 is in the open position or the closed position, the safety opening and closing position blocks or connects the inlet channel 10 and the outlet channel 11, thereby allowing cleaning operations only when the valve is closed. The cleaning medium can be gas purging or liquid flushing. This design not only avoids pipeline medium contamination, but also makes operation safer.

[0030] As attached Figure 2 、 3As shown in Figure 9, the safety opening and closing device 8 includes a mounting seat 12, an opening and closing valve disc 13, a guide block 14, a linkage bead 15, a reset spring 16 and a rubber plug 17. The valve cover 2 is provided with a mounting cavity 18 connected to the inlet channel 10 and the outlet channel 11. The mounting seat 12 is arranged in the mounting cavity 18. The mounting seat 12 is provided with an outer hole 19, a middle hole 20 and an inner hole 21 that are interconnected in the axial direction. The inner diameters of the three are reduced in sequence. A sealing step 22 is formed between the middle hole 20 and the inner hole 21. The mounting The seat 12 includes an outer shaft section 23 and an inner shaft section 24. The outer diameter of the outer shaft section 23 is larger than the outer diameter of the inner shaft section 24. The outer circumferential surface of the outer shaft section 23 is tightly fitted with the inner wall of the mounting cavity 18, and an outer shaft annular groove 25 is opened on the outer circumference of the outer shaft section 23. The outer shaft annular groove 25 is connected to the outlet channel 11, and the outer shaft annular groove 25 is connected to the middle hole 20 through multiple outer guide holes 26. A flow gap 27 is formed between the outer circumferential surface of the inner shaft section 24 and the inner circumferential surface of the mounting cavity 18, and the inner shaft section 24 is distributed in a circular array. There are multiple inner guide holes 28 connecting the inner hole 21 and the flow gap 27, the rubber plug 17 is installed in the outer hole 19, the opening and closing valve disc 13 is slidably set in the middle hole 20, the inner end of the opening and closing valve disc 13 is conical, and the outer circumference of the opening and closing valve disc 13 is provided with multiple first guide grooves 29 extending in the axial direction, the reset spring 16 is clamped between the rubber plug 17 and the opening and closing valve disc 13, the guide block 14 and the linkage bead 15 are slidably set in the inner hole 21, and the outer circumference of the guide block 14 is provided with multiple second guide grooves 3 extending in the axial direction. 0; The outer periphery of the valve stem 3 is provided with an arcuate track groove 31 of uniform depth, one end of the arcuate track groove 31 is connected to the outer cylindrical surface of the valve stem 3 via a transmission inclined surface 32, and the linkage bead 15 partially extends into the arcuate track groove 31; when the ball 4 is in the unclosed position, the linkage bead 15 is in the arcuate track groove 31, and the opening and closing valve disc 13 is tightly pressed against the sealing step 22. When the ball 4 is in the closed position, the linkage bead 15 rolls to the outer cylindrical surface of the valve stem 3 and pushes the guide block 14, prompting the opening and closing valve disc 13 to leave the sealing step 22. When the valve is open, the linkage bead 15 engages in the arcuate track groove 31. Simultaneously, the opening and closing valve disc 13, under the action of the return spring 16, presses against the sealing step 22, closing the inlet channel 10 and the outlet channel 11. When the valve is closed, the linkage bead 15 is pushed into the inner hole 21 by the side of the valve stem 3, simultaneously pushing the guide block 14, causing the opening and closing valve disc 13 to disengage the sealing step 22. At this time, the medium enters the central cavity 5 via the inlet channel 10, the flow gap 27, the inner hole 21, the central hole 20, the outer guide hole 26, the outer shaft annular groove 25, and the outlet channel 11, thereby cleaning the central cavity 5. This structure is very ingenious, and no additional operating structure is required to operate the safety opening and closing device 8, making it very convenient to use.

[0031] As attached Figure 2 and attached Figure 3As shown, the safety opening and closing device 8 also includes a hexagonal screw 33. The outer end of the valve cover 2 is provided with a mounting screw hole 34 connected to the mounting cavity 18. The inner wall of the mounting cavity 18 is provided with a limiting step 35. The hexagonal screw 33 is threadedly connected to the mounting screw hole 34, and the inner end of the hexagonal screw 33 presses the rubber plug 17 into the outer hole 19, causing the inner end of the outer shaft segment 23 to press against the limiting step 35. The outer circumferential surface of the outer shaft segment 23 corresponding to the inner and outer sides of the outer shaft annular groove 25 are respectively provided with a first sealing ring 36 for forming a sealing fit with the inner wall of the mounting cavity 18. This design can achieve rapid installation of the safety opening and closing device 8, and the installation structure is simple and reliable, with good sealing performance.

[0032] As attached Figure 1 and attached Figure 2 As shown, the inlet passage 10 includes an axial flow hole 37 extending axially from the upper end of the valve stem 3, a first annular flow confluence groove 38 provided on the outer circumference of the valve stem 3, and a plurality of radial flow holes 39 distributed in a circumferential array, connecting the axial flow hole 37 with the first annular flow confluence groove 38. The first annular flow confluence groove 38 is connected to the installation cavity 18. Regardless of the angle of the valve stem 3 relative to the safety opening and closing device 8, the inlet passage 10 can be connected to the installation cavity 18, eliminating the need for additional positioning structure, thereby facilitating assembly operations.

[0033] As attached Figure 4 and attached Figure 5 As shown, the inner end surface of the valve cover 2 is provided with an annular mounting groove 40, and the cleaning device 9 includes a mounting ring 41 installed in the annular mounting groove 40 and a guide ring 42 connected to the mounting ring 41, and a plurality of spray bosses 43 are provided at the lower end of the guide ring 42, and a first annular cavity 44 and a second annular cavity 45 are axially provided in the guide ring 42, and a first through hole 46 for connecting the outlet channel 11 and the first annular cavity 44 is opened at the upper end of the guide ring 42, and a second sealing ring 47 for forming a sealing fit with the inner end surface of the annular mounting groove 40 is respectively provided at the inner and outer positions corresponding to the first through hole 46 at the upper end of the guide ring 42, a plurality of second through holes 48 are distributed in a circumferential array between the first annular cavity 44 and the second annular cavity 45, and a plurality of outlet grooves 49 corresponding to the spray bosses 43 are provided at the lower end of the second annular cavity 45, and a plurality of spray holes 50 extending to the outer ends of the corresponding spray bosses 43 are provided at the inner ends of the outlet grooves 49. Through the structure of two annular cavities and multiple second through holes 48, the medium pressure in multiple spray holes 50 can be evenly distributed, avoiding the situation where the pressure of the spray holes 50 close to the first through hole 46 is too high and the pressure of the spray holes 50 far from the first through hole 46 is too low, which is conducive to ensuring good cleaning effect in various parts.

[0034] As attached Figure 4 and attached Figure 5As shown, the cleaning device 9 also includes multiple sets of locking nuts 51 and spray heads 52. The locking nuts 51 are threadedly engaged with the corresponding spray bosses 43 and press the corresponding spray heads 52 against the spray bosses 43. The upper end of the spray head 52 is provided with multiple inclined holes 53 connected to the spray holes 50, and the multiple inclined holes 53 are arranged gradually closer to each other from top to bottom. The upper end of the spray head 52 is also provided with multiple positioning protrusions 54, and the lower end of the spray boss 43 is provided with multiple positioning grooves 55 that fit with the positioning protrusions 54. The addition of the spray head 52 guides the sprayed medium in a direction close to each other. At the moment when multiple streams of medium are ejected from the outlet of the spray head 52, the multiple streams of medium impact each other and disperse, which can increase the cleaning area and improve the cleaning effect.

[0035] As attached Figure 4 and attached Figure 5 As shown, the mounting ring 41 is welded in the annular mounting groove 40, and a plurality of locking protrusions 56 are provided on the inner circumferential surface of the guide ring 42, and a plurality of locking grooves 57 are provided on the outer circumferential surface of the mounting ring 41 to cooperate with the locking protrusions 56. The locking groove 57 includes a vertical slide groove portion 58 extending upward from the lower end of the mounting ring 41 and an arcuate slide groove portion 59 extending circumferentially from the vertical slide groove portion 58 along the mounting ring 41. The width of the arcuate slide groove portion 59 gradually decreases, and when the locking protrusion 56 is located at one end of the arcuate slide groove portion 59 close to the vertical slide groove portion 58, the locking protrusion 56 and the arcuate slide groove portion 59 are clearance-fitted. When the locking protrusion 56 is located at one end of the arcuate slide groove portion 59 away from the vertical slide groove portion 58, the locking protrusion 56 and the arcuate slide groove portion 59 are interference-fitted. When installing the guide ring 42, the guide ring can be installed by adopting two actions of "pushing up + rotating in the circumferential direction". When removing, the reverse operation can be performed, which is very convenient to operate.

[0036] As attached Figure 6 、 7As shown in Figure 10, it also includes a safety dial button 75. The upper end of the inlet channel 10 is provided with an adjustment groove 76. The adjusting groove 76 is vertically provided with a first positioning recess 60 and a second positioning recess 61 in the shape of a semi-ellipsoid. The safety dial button 75 is inserted into the adjustment groove 76. The side of the safety dial button 75 is provided with a positioning protrusion 62 with a semi-ellipsoidal cross-section. When the safety dial button 75 slides vertically, the positioning protrusion 62 has a first position that fits with the first positioning recess 60 and a second position that fits with the second positioning recess 61. A vertical groove 63 for guiding the positioning protrusion 62 is provided between the first positioning recess 60 and the second positioning recess 61. The depth of the vertical groove 63 is less than the depth of the first positioning recess 60 and the second positioning recess 61. The upper side of the safety dial button 75 is vertically provided with a positioning protrusion 62 that fits with the inlet channel The axial hole 64 is connected to the valve stem 10, and the upper end of the axial hole 64 is threadedly connected with a screw plug 65, and a sealing gasket can be provided between the screw plug 65 and the safety dial button 75 for sealing; the handle 7 is sleeved on the outer periphery of the valve stem 3, and the position of the valve stem 3 corresponding to the lower end of the handle 7 is clamped with a retaining spring 66, and the position of the valve stem 3 corresponding to the upper end of the handle 7 is threadedly connected with a pressure cover 67, the pressure cover 67 and the retaining spring 66 constitute an axial limit for the handle 7, and the inner end of the pressure cover 67 is provided with a sealing ring for forming a sealing fit with the valve stem 3 and the safety dial button 75, the upper end of the handle 7 is provided with a locking rod 68, and the safety dial button 75 is provided with a locking groove 69, when the positioning protrusion 62 is in the first position, the locking rod 68 fits in the locking groove 69, and when the positioning protrusion 62 is in the second position, the locking rod 68 is separated from the locking groove 69. When the valve is in normal use, the safety dial button 75 is pulled up. At this time, the positioning protrusion 62 is in the first position, and the locking groove 69 on the safety dial button 75 is separated from the locking rod 68 on the handle 7, and the handle 7 can rotate freely. When the middle cavity 5 needs to be cleaned, the handle 7 is first operated to close the valve, and then the safety dial button 75 is pressed down. At this time, the positioning protrusion 62 is in the second position, and the locking rod 68 on the handle 7 is inserted into the locking groove 69 of the safety dial button 75. The handle 7 is locked and the valve cannot be opened. Then, the screw plug 65 is unscrewed, the external pipeline is connected, and the medium is introduced to clean the valve middle cavity 5. During the cleaning process, there is no need to worry about the valve being accidentally opened, which greatly improves the safety of operation.

[0037] As attached Figure 1 As shown, the bottom of the valve body 1 is provided with a drain hole 70, the outer end of which is threadedly connected to a threaded plug 71, and a sealing gasket is provided between the threaded plug 71 and the valve body 1 for sealing. Sewage can be drained through the bottom of the valve to prevent stains from accumulating in the middle cavity 5 after cleaning.

[0038] As attached Figure 11As shown, a fireproof ring 72 is sandwiched between the valve seat 6 and the inner wall of the valve body 1. The fireproof ring 72 is made of metal and has multiple positioning holes 73. The valve seat 6 is equipped with multiple positioning bumps 74 that fit into the positioning holes 73. This design ensures that the valve can maintain an effective seal even under high temperature or fire conditions, preventing large-scale leakage of flammable media and ensuring safe operation of the system.

Claims

1. A floating ball valve with a cleared central cavity, comprising a valve body (1), a valve cover (2), a valve stem (3) and a ball (4), wherein the valve body (1) is provided with a central cavity (5), the ball (4) is arranged in the central cavity (5), the valve cover (2) is mounted on the upper end of the valve body (1), the valve body (1) penetrates the valve cover (2) and extends into the central cavity (5) to be linked with the ball (4), a valve seat (6) is provided at positions corresponding to both sides of the ball (4) in the central cavity (5) for forming a sealing fit with the ball (4) when the valve is closed, and a handle (7) is mounted on the upper end of the valve stem (3) in a circumferentially linked manner; and characterized in that: The valve stem (3) is provided with an inlet channel (10), and the valve cover (2) is provided with an outlet channel (11) communicating with the middle cavity (5). The safety opening and closing device (8) is arranged between the inlet channel (10) and the outlet channel (11), and the valve stem (3) and the safety opening and closing device (8) are linked to each other, so that when the valve stem (3) drives the ball (4) to move to the closed position, the inlet channel (10) and the outlet channel (11) are connected, and when the valve stem (3) drives the ball (4) to move to the open position, the inlet channel (10) and the outlet channel (11) are blocked. The cleaning device (9) is arranged at one end of the outlet channel (11) close to the middle cavity (5) and is used to spray a medium to clean the middle cavity (5).

2. The floating ball valve with a clean center cavity according to claim 1, characterized in that: The safety opening and closing device (8) comprises a mounting seat (12), an opening and closing valve disc (13), a guide block (14), a linkage bead (15), a reset spring (16) and a rubber plug (17); a mounting cavity (18) communicating with the inlet channel (10) and the outlet channel (11) is provided in the valve cover (2); the mounting seat (12) is arranged in the mounting cavity (18); an outer hole (19), a middle hole (20) and an inner hole (21) communicating with each other are sequentially provided on the mounting seat (12) along the axial direction; a sealing step (22) is formed between the middle hole (20) and the inner hole (21); The mounting seat (12) includes an outer shaft section (23) and an inner shaft section (24), wherein the outer circumferential surface of the outer shaft section (23) is tightly fitted with the inner wall of the mounting cavity (18), and an outer shaft annular groove (25) is provided on the outer circumference of the outer shaft section (23), wherein the outer shaft annular groove (25) is connected to the outlet channel (11), and the outer shaft annular groove (25) is connected to the middle hole (20) through a plurality of outer guide holes (26), and a flow gap (27) is formed between the outer circumferential surface of the inner shaft section (24) and the inner circumferential surface of the mounting cavity (18), and a plurality of communicating inner holes are distributed in a circumferential array on the inner shaft section (24). (21) and the inner guide hole (28) of the flow gap (27), the rubber plug (17) is installed in the outer hole (19), the opening and closing valve disc (13) is slidably arranged in the middle hole (20), and the outer circumference of the opening and closing valve disc (13) is provided with a plurality of first guide grooves (29) extending in the axial direction, the reset spring (16) is clamped between the rubber plug (17) and the opening and closing valve disc (13), the guide block (14) and the linkage bead (15) are slidably arranged in the inner hole (21), and the outer circumference of the guide block (14) is provided with a plurality of second guide grooves (30) extending in the axial direction; the outer periphery of the valve stem (3) An arcuate track groove (31) of uniform depth is provided, one end of the arcuate track groove (31) is connected to the outer cylindrical surface of the valve stem (3) through a transmission inclined surface (32), and the linkage bead (15) partially extends into the arcuate track groove (31); when the ball (4) is in an unclosed position, the linkage bead (15) is in the arcuate track groove (31), and the opening and closing valve disc (13) is tightly pressed against the sealing step (22); when the ball (4) is in a closed position, the linkage bead (15) rolls to the outer cylindrical surface of the valve stem (3) and pushes the guide block (14), causing the opening and closing valve disc (13) to leave the sealing step (22).

3. The floating ball valve with a cleaned center cavity according to claim 2, characterized in that: The safety opening and closing device (8) also includes a hexagonal screw (33), the outer end of the valve cover (2) is provided with a mounting screw hole (34) connected to the mounting cavity (18), the inner wall of the mounting cavity (18) is provided with a limiting step (35), the hexagonal screw (33) is threadedly connected to the mounting screw hole (34), and the inner end of the hexagonal screw (33) presses the rubber plug (17) into the outer hole (19), so that the inner end of the outer shaft section (23) is pressed against the limiting step (35), and the outer circumferential surface of the outer shaft section (23) corresponding to the inner and outer sides of the outer shaft annular groove (25) are respectively provided with a first sealing ring (36) for forming a sealing fit with the inner wall of the mounting cavity (18).

4. The floating ball valve with a clean center cavity according to claim 2, characterized in that: The inlet channel (10) comprises an axial flow hole (37) extending axially from the upper end of the valve stem (3), a first annular confluence groove (38) arranged on the outer periphery of the valve stem (3), and a plurality of radial flow holes (39) distributed in a circumferential array to connect the axial flow hole (37) and the first annular confluence groove (38), and the first annular confluence groove (38) is connected to the installation cavity (18).

5. The floating ball valve with a clean center cavity according to claim 2, characterized in that: The inner end surface of the valve cover (2) is provided with an annular mounting groove (40), the cleaning device (9) comprises a mounting ring (41) mounted in the annular mounting groove (40) and a guide ring (42) connected to the mounting ring (41), a plurality of spray bosses (43) are provided at the lower end of the guide ring (42), a first annular cavity (44) and a second annular cavity (45) are provided in the axial direction of the guide ring (42), a first through hole (46) for connecting the outlet channel (11) and the first annular cavity (44) is provided at the upper end of the guide ring (42), and A second sealing ring (47) for forming a sealing fit with the inner end surface of the annular mounting groove (40) is provided at the inner and outer sides of the upper end of the guide ring (42) corresponding to the first through hole (46), a plurality of second through holes (48) are distributed in a circumferential array between the first annular cavity (44) and the second annular cavity (45), a plurality of outlet grooves (49) corresponding to the spray boss (43) are provided at the lower end of the second annular cavity (45), and a plurality of spray holes (50) extending to the outer ends of the corresponding spray bosses (43) are provided at the inner ends of the outlet grooves (49).

6. The floating ball valve with a cleaned center cavity according to claim 5, characterized in that: The cleaning device (9) further comprises a plurality of locking nuts (51) and spray heads (52), wherein the locking nuts (51) are threadedly engaged with the corresponding spray bosses (43) and press the corresponding spray heads (52) onto the spray bosses (43), wherein the upper end of the spray heads (52) is provided with a plurality of inclined holes (53) connected to the spray holes (50), and the plurality of inclined holes (53) are gradually arranged close to each other from top to bottom, and the upper end of the spray heads (52) is further provided with a plurality of positioning protrusions (54), and the lower end of the spray bosses (43) is provided with a plurality of positioning grooves (55) matched with the positioning protrusions (54).

7. The floating ball valve with a cleaned center cavity according to claim 5, characterized in that: The mounting ring (41) is welded in the annular mounting groove (40), a plurality of locking protrusions (56) are provided on the inner circumferential surface of the guide ring (42), a plurality of locking grooves (57) matching the locking protrusions (56) are provided on the outer circumferential surface of the mounting ring (41), and the locking grooves (57) include a vertical sliding groove portion (58) extending upward from the lower end of the mounting ring (41) and an arc-shaped sliding groove portion (58) extending along the circumference of the mounting ring (41). The width of the arc-shaped chute portion (59) gradually decreases, and when the locking protrusion (56) is located at one end of the arc-shaped chute portion (59) close to the vertical chute portion (58), the locking protrusion (56) and the arc-shaped chute portion (59) are clearance-fitted, and when the locking protrusion (56) is located at one end of the arc-shaped chute portion (59) away from the vertical chute portion (58), the locking protrusion (56) and the arc-shaped chute portion (59) are interference-fitted.

8. The floating ball valve with a clean center cavity according to claim 1, characterized in that: The invention also includes a safety dial button (75), an adjustment groove (76) is provided at the upper end of the inlet channel (10), a first positioning recess (60) and a second positioning recess (61) in the shape of a semi-ellipsoid are vertically provided in the adjustment groove (76), the safety dial button (75) is inserted into the adjustment groove (76), and a positioning protrusion (62) with a semi-ellipsoidal cross section is provided on the side of the safety dial button (75), when the safety dial button (75) slides vertically, the positioning protrusion (62) has a first position that matches the first positioning concave portion (60) and a second position that matches the second positioning concave portion (61), and a vertical groove (63) for guiding the positioning protrusion (62) is provided between the first positioning concave portion (60) and the second positioning concave portion (61), and the depth of the vertical groove (63) is less than the depth of the first positioning concave portion (60) and the second positioning concave portion (61). The safety dial button (75) is vertically provided with an axial hole (64) connected to the inlet channel (10), and the upper end of the axial hole (64) is threadedly connected with a screw plug (65); the handle (7) is sleeved on the outer periphery of the valve stem (3), and the position of the valve stem (3) corresponding to the lower end of the handle (7) is clamped with a retaining spring (66), and the position of the valve stem (3) corresponding to the upper end of the handle (7) is threadedly connected with a pressure cover (67), and the pressure cover (67) and the retaining spring (66) constitute an axial limit for the handle (7), and a locking rod (68) is provided at the upper end of the handle (7). A locking groove (69) is provided on the safety dial button (75), and when the positioning protrusion (62) is in the first position, the locking rod (68) is matched with the locking groove (69), and when the positioning protrusion (62) is in the second position, the locking rod (68) is separated from the locking groove (69).

9. The floating ball valve with a clean center cavity according to claim 1, characterized in that: The bottom of the valve body (1) is provided with a drain hole (70), and the outer end of the drain hole (70) is threadedly connected to a threaded plug (71).

10. The floating ball valve with a cleaned center cavity according to claim 1, characterized in that: A fireproof ring (72) is sandwiched between the valve seat (6) and the inner wall of the valve body (1), and a plurality of positioning holes (73) are provided on the fireproof ring (72). The valve seat (6) is provided with a plurality of positioning protrusions (74) that fit with the positioning holes (73).

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