Top-mounted C-shaped wear-resistant ball valve and using method thereof

Abstract

The invention belongs to the technical field of valves, and particularly relates to a top-mounted C-shaped wear-resistant ball valve which comprises a valve body, a flow channel is formed in the valve body, and a medium inlet and a medium outlet which communicate with the flow channel are formed in the two sides of the valve body correspondingly; the valve cover is arranged at the top end of the valve body; the valve rod is arranged on the valve cover in a penetrating manner; the valve element is arranged in the flow channel, and the valve element is connected with the bottom end of the valve rod; the valve seat is arranged in the flow channel and can be matched with the valve element to form a sealing face, and a pre-tightening disc spring is arranged between the valve seat and the valve body. The ash discharging structure is arranged between the pre-tightening disc spring and the valve body and is used for cleaning solid particles accumulated and blocked around the pre-tightening disc spring; and a sealing surface formed by matching the valve seat and the valve core is positioned on one side opposite to the flow direction of a medium. Compared with the prior art, the phenomenon that the sealing faces and the pre-tightening disc springs fail can be effectively reduced, the service life of the ball valve is prolonged, and the use stability of the ball valve is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, and in particular relates to a top-mounted C-shaped wear-resistant ball valve and a use method thereof. Background Art

[0002] A top-loading C-type ball valve is a valve used to control the flow of fluid in a pipeline system. It is a type of ball valve and has the characteristics of simple structure, good sealing performance, and convenient operation. For example, a top-loading C-type ball valve disclosed in the patent with application number CN201310653720.3 includes a valve body, a valve seat, a valve core, a valve cover, an upper valve stem, and a lower valve stem. The valve body includes a water inlet, a water outlet, and a control port. The valve cover is fixedly arranged at the control port. The valve core is C-shaped and is formed integrally with the upper valve stem. The upper valve stem passes through the valve cover and is connected to a driving device. A mounting hole is formed at the bottom of the valve body opposite to the control port. The lower valve stem, which is fixedly connected to the valve body at the tail, penetrates from the bottom into the interior of the valve body and rotatably cooperates with the C-shaped valve core. The valve seat is arranged on the water inlet side of the valve body and is in sealing contact with the valve core when the ball valve is closed.

[0003] During use of the existing top-mounted C-type ball valve, the medium is likely to directly scour the valve seat sealing surface, causing the sealing surface to fail. At the same time, the preload spring is likely to fail due to the accumulation of solid particles and become stuck. In addition, the C-type ball valve cannot effectively cope with the impact caused by the water hammer effect during use. The valve core and valve stem are easily damaged due to the impact, which reduces the service life of the ball valve. Therefore, it is necessary to make improvements. Summary of the invention

[0004] The purpose of the present invention is to provide a top-mounted C-shaped wear-resistant ball valve and a method of using the same in order to effectively improve the stability and service life of the top-mounted C-shaped wear-resistant ball valve in use in view of the above-mentioned technical problems.

[0005] In view of this, the present invention provides a top-mounted C-shaped wear-resistant ball valve, comprising:

[0006] A valve body, wherein a flow channel is arranged in the valve body, and a medium inlet and a medium outlet respectively communicated with the flow channel are arranged on both sides of the valve body;

[0007] A valve cover, the valve cover is arranged on the top end of the valve body;

[0008] A valve stem, wherein the valve stem is inserted into the valve cover;

[0009] A valve core, the valve core is arranged in the flow channel, and the valve core is connected to the bottom end of the valve stem;

[0010] A valve seat, which is arranged in the flow channel and can cooperate with the valve core to form a sealing surface, and a preloaded disc spring is arranged between the valve seat and the valve body;

[0011] Also includes:

[0012] An ash removal structure, which is arranged between the preload disc spring and the valve body and is used to clean up solid particles accumulated and stuck around the preload disc spring;

[0013] Wherein, the sealing surface formed by the cooperation between the valve seat and the valve core is located on the side facing away from the flow direction of the medium.

[0014] In the present technical scheme, during the use of the top-mounted C-shaped wear-resistant ball valve, when the valve is opened, the valve stem is rotated to drive the valve core to move, the valve core moves and opens the flow channel, the medium enters the flow channel from the medium inlet and flows out from the medium outlet, and the medium flows in the flow channel after the valve is opened. At the same time, under the action of the medium pressure, the ash discharge structure can smoothly carry away the solid particles or powder accumulated on the pre-tightening disc spring during the flow of the medium, and the medium can also flush the impurities along the sealing surface 360° during the flow of the medium. At the same time, since the sealing surface is located on the side opposite to the flow direction of the medium, it can effectively prevent the medium from directly scouring the valve seat sealing surface, thereby effectively extending the service life of the valve. Compared with the prior art, the present invention can effectively reduce the failure of the sealing surface and the pre-tightening disc spring, thereby improving the service life and stability of the ball valve.

[0015] In the above technical solution, further, the ash removal structure also includes:

[0016] An ash discharge ring, wherein a plurality of ash discharge grooves are provided on the ash discharge ring;

[0017] Among them, a plurality of ash discharge grooves are evenly spaced and distributed along the circumference of the ash discharge ring, and the ash discharge grooves are located on the side wall of the ash discharge ring facing the preload spring.

[0018] In the above technical solution, further, the flow channel is an open flow channel structure and the inner surface of the valve body is streamlined.

[0019] In the above technical solution, further, the valve stem and the valve core are connected via a spline.

[0020] In the above technical solution, further, it also includes:

[0021] A protection structure is provided in the flow channel and located between the medium inlet and the valve core, and is used to reduce the impact of the water hammer effect on the valve core.

[0022] In the above technical solution, further, the protection mechanism also includes:

[0023] An annular movable groove, which is arranged on the inner wall of the flow channel and is distributed concentrically with the flow channel, and is located between the medium inlet and the valve core;

[0024] A mounting ring, the mounting ring is arranged in the annular movable groove and is distributed concentrically with the annular movable groove;

[0025] An energy absorbing member, the energy absorbing member being arranged at the center of the mounting ring;

[0026] A buffer connection member, the buffer connection member comprising a buffer connection portion and a friction transducer portion;

[0027] Wherein, the mounting ring is movably arranged in the annular movable groove through a buffer connection piece.

[0028] In the above technical solution, further, the energy absorbing member further includes:

[0029] A deceleration rod, wherein the head end of the deceleration rod faces the medium inlet, two diameter-changing spiral deceleration flow channels are arranged in the deceleration rod, and a lateral jet port is arranged on the side wall of the tail of the deceleration rod;

[0030] A baffle plate, the baffle plate is arranged at the head end of the deceleration rod, and a conical collecting groove for absorbing the incoming flow medium is provided on the surface of the baffle plate facing the medium inlet;

[0031] Among them, the deceleration rod is in the shape of a round rod with equal diameter, the inlet end of the variable diameter spiral deceleration flow channel is connected to the conical collecting groove, and the outlet end is connected to the lateral jet port, the radius of the variable diameter spiral deceleration flow channel gradually increases from the head end to the tail end of the deceleration rod, and the two variable diameter spiral deceleration flow channels are distributed in a winding shape.

[0032] In the above technical solution, further, the buffer connection part also includes:

[0033] A connecting column, wherein a cavity is provided in the connecting column;

[0034] A piston group, the piston group comprising a front piston and a rear piston spaced apart and arranged in the cavity;

[0035] A movable rod, the movable rod is passed through the connecting column, one end of the movable rod is connected to the mounting ring, and the other end is connected to the front piston;

[0036] Wherein, the front piston and the rear piston are both movably sealedly connected to the inner wall of the cavity through a sealing member, and an inert gas is filled between the front piston and the rear piston.

[0037] In the above technical solution, further, the friction transducer unit also includes:

[0038] A linkage rack, which is arranged on the side wall of the rear piston away from the front piston and is distributed parallel to the axis of the connecting column;

[0039] An outer shell, the outer shell is arranged on the side wall of the connecting column, and a friction layer is arranged on the inner wall of the outer shell;

[0040] A rotating column, the rotating column is rotatably arranged in the outer shell, and two extension rods are symmetrically arranged on the side wall of the rotating column along the radial direction of the rotating column;

[0041] A friction block, wherein the friction block is movably disposed on the rotating column, and the outer surface of the friction block is a friction surface that cooperates with the friction layer;

[0042] A return spring, wherein the return spring is sleeved on the rotating column, and the two ends of the return spring are respectively connected to the friction block and the rotating column;

[0043] Among them, one end of the rotating column extends into the cavity of the connecting column and is installed with a transmission gear, and the linkage rack is meshed with the transmission gear.

[0044] In the above technical solution, further, the present invention also discloses a method for using a top-mounted C-shaped wear-resistant ball valve, comprising the following steps:

[0045] The S1 valve is opened, the valve stem is rotated to drive the valve core to move, the valve core moves and opens the flow channel, the medium enters the flow channel from the medium inlet and flows out from the medium outlet;

[0046] S2 ash discharge: the medium flows in the flow channel after the valve is opened. At the same time, under the action of the medium pressure, the solid particles or powder accumulated on the preloaded disc spring can be taken away by the medium under the action of the ash discharge groove. In the process of medium flow, the medium flushes the impurities along the sealing surface 360°, and when the medium flows in the flow channel of the open flow channel structure, it also flushes the attachments on the inner wall of the flow channel;

[0047] When the S3 valve is closed, the valve stem is rotated to drive the valve core to move. The valve core moves and cooperates with the valve seat to form a sealing surface to close the flow channel. When the valve core approaches the valve seat, it scrapes away particles on the surface of the valve seat.

[0048] S4 protection, when the valve is closed, the water hammer effect occurs, the medium flows and impacts the protection structure, when the medium impacts and moves to the energy absorbing member, the main flow impact part of the medium is collected by the conical collection groove on the baffle plate, and the medium enters the variable diameter spiral deceleration flow channel after being collected by the conical collection groove. When the medium flows in the variable diameter spiral deceleration flow channel, it continuously turns and collides, and finally flows out from the side jet port;

[0049] S5 buffering: when the main impact of the medium is protected by the baffle plate, the flow impact of the medium is transmitted from the energy absorbing member to the mounting ring and finally to the buffer connector. The buffer connector buffers the impact through the buffer connector and the friction transducer.

[0050] In the present technical solution, the operation method of the top-mounted C-shaped wear-resistant ball valve is simple. The valve core only needs to be driven by a conventional valve stem. The ball valve can effectively maintain the sealing effect of the sealing surface during use, and can prevent the pre-tightening disc spring from failing due to the accumulation of solid particles or powder. At the same time, it can automatically protect against impact when the water hammer effect occurs, effectively protecting the valve core from the impact, and further improving the service life of the ball valve.

[0051] The beneficial effects of the present invention are:

[0052] 1. By placing the sealing surface against the flow direction of the medium, the medium can be effectively prevented from directly scouring the valve seat sealing surface, thereby effectively improving the sealing stability of the sealing surface and extending the service life of the ball valve;

[0053] 2. The dust removal structure allows the solid particles or powder accumulated on the preload disc spring to be smoothly removed during the flow of the medium, effectively reducing the failure of the preload disc spring and improving the service life and stability of the ball valve;

[0054] 3. Through the setting of the protective structure, the protective structure can effectively protect the valve core from direct impact of the medium when the water hammer effect occurs, thereby reducing the phenomenon of damage to the valve core due to impact and effectively improving the service life of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0056] Figure 1 It is a schematic structural diagram of a specific implementation method of the present invention.

[0057] Figure 2 It is a schematic structural diagram of a vertical cross-section of the valve body of the present invention.

[0058] Figure 3 It is a schematic diagram of the spline connection structure of the present invention.

[0059] Figure 4 It is a schematic diagram of the horizontal cross-sectional structure of the valve body of the present invention.

[0060] Figure 5 It is a schematic diagram of the structure of the ash unloading ring of the present invention.

[0061] Figure 6 It is a schematic diagram of the protective structure of the present invention.

[0062] Figure 7It is a schematic diagram of the structure of the energy absorbing member of the present invention.

[0063] Figure 8 It is a schematic diagram of the structure of the buffer connector of the present invention.

[0064] Fig. 9 It is a schematic diagram of the structure of the friction transducer of the present invention.

[0065] The symbols in the figure are:

[0066] 1. Valve body; 100. Flow channel; 101. Medium inlet; 102. Medium outlet; 2. Valve cover; 3. Valve stem; 4. Valve core; 5. Valve seat; 50. Sealing surface; 6. Preload disc spring; 7. Ash discharge structure; 70. Ash discharge ring; 71. Ash discharge groove; 8. Spline; 9. Protection structure; 90. Annular movable groove; 91. Mounting ring; 92. Energy absorbing part; 920. Speed ​​reduction rod; 921. Variable diameter spiral speed reduction flow channel; 922. Side Toward the jet port; 923, baffle plate; 924, conical collecting trough; 93, buffer connection; 930, connecting column; 931, cavity; 932, front piston; 933, rear piston; 934, movable rod; 94, friction transducer; 940, linkage rack; 941, outer shell; 942, friction layer; 943, rotating column; 944, extension rod; 945, friction block; 946, return spring; 947, transmission gear. DETAILED DESCRIPTION

[0067] 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.

[0068] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0069] Embodiment 1:

[0070] The embodiment of the present application provides a top-mounted C-shaped wear-resistant ball valve, comprising: a valve body 1, a flow channel 100 is arranged in the valve body 1, and a medium inlet 101 and a medium outlet 102 respectively connected to the flow channel 100 are arranged on both sides of the valve body 1; a valve cover 2, the valve cover 2 is arranged at the top of the valve body 1; a valve stem 3, the valve stem 3 is penetrated on the valve cover 2; a valve core 4, the valve core 4 is arranged in the flow channel 100, and the valve core 4 is connected to the bottom end of the valve stem 3; a valve seat 5, the valve seat 5 is arranged in the flow channel 100 and can cooperate with the valve core 4 to form a sealing surface 50, and a preloaded disc spring 6 is arranged between the valve seat 5 and the valve body 1;

[0071] It also includes: an ash discharge structure 7, which is arranged between the preload disc spring 6 and the valve body 1 and is used to clean up the solid particles accumulated and stuck around the preload disc spring 6;

[0072] The sealing surface 50 formed by the valve seat 5 and the valve core 4 is located on the side facing away from the flow direction of the medium.

[0073] Moreover, a bottom cover is installed at the bottom of the valve body 1, and conventional connecting flanges are installed at the ends of the medium inlet 101 and the medium outlet 102. A bracket is also installed on the valve cover 2, and a handwheel is installed at the top of the valve stem 3. The valve core 4 and the bottom end of the valve stem 3 can be connected by a conventional key connection method. Conventional bearings and packings are also installed between the valve stem 3 and the valve cover 2. The packings are fixedly installed by conventional packing sleeves and packing pressure plates. The valve cover 2 and the valve body 1 are connected by conventional bolts and conventional spiral wound gaskets are also installed on the connecting surfaces of the two. Conventional baffles and valve seat 5 sealing rings are also installed on the outside of the valve seat 5. A sealing ring pressure ring is also installed between the valve seat 5 and the pre-tightening disc spring 6. The inner diameter end face of the pre-tightening disc spring 6 is pressed on the ash discharge structure 7, and the outer diameter end face is pressed on the sealing ring pressure ring.

[0074] In this embodiment, during use of the top-mounted C-shaped wear-resistant ball valve, when the valve is opened, the valve stem 3 is rotated to drive the valve core 4 to move, the valve core 4 moves and opens the flow channel 100, the medium enters the flow channel 100 from the medium inlet 101 and flows out from the medium outlet 102, and the medium flows in the flow channel 100 after the valve is opened. At the same time, under the action of the medium pressure, the ash discharge structure 7 can smoothly carry away the solid particles or powder accumulated on the preloaded disc spring 6 during the flow of the medium, and the medium can also flush the impurities along the sealing surface 50360° during the flow of the medium. At the same time, since the sealing surface 50 is located on the side opposite to the flow direction of the medium, it can effectively prevent the medium from directly scouring the sealing surface 50 of the valve seat 5, effectively extending the service life of the valve. Compared with the prior art, the present invention can effectively reduce the failure of the sealing surface 50 and the preloaded disc spring 6, thereby improving the service life and stability of the ball valve.

[0075] Embodiment 2:

[0076] This embodiment provides a top-mounted C-shaped wear-resistant ball valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the ash discharge structure 7 also includes: an ash discharge ring 70, and a plurality of ash discharge grooves 71 are provided on the ash discharge ring 70;

[0077] Among them, a plurality of ash discharge grooves 71 are evenly spaced and distributed along the circumference of the ash discharge ring 70 , and the ash discharge grooves 71 are located on the side wall of the ash discharge ring 70 facing the preload spring.

[0078] Moreover, the inner diameter end face of the preload disc spring 6 is pressed on the ash removal ring 70, and the outer diameter end face is pressed on the sealing ring pressure ring. The surface of the ash removal ring 70 facing the preload disc spring 6 is also equipped with a number of protrusions for supporting and limiting, and the protrusions protrude along the axial direction of the ash removal ring 70.

[0079] In this embodiment, the medium flows in the flow channel 100 after the valve is opened. At the same time, under the action of the medium pressure, the solid particles or powder accumulated on the preload disc spring 6 can be carried away by the medium through the ash discharge groove 71 as the medium impacts, thereby effectively preventing the solid particles or powder from accumulating on the preload disc spring 6, maintaining the preload disc spring 6 with sufficient deformation space, thereby improving the working stability of the preload disc spring 6.

[0080] Embodiment 3:

[0081] This embodiment provides a top-mounted C-shaped wear-resistant ball valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the flow channel 100 is an open flow channel 100 structure and the internal surface of the valve body 1 is streamlined.

[0082] In the present embodiment, the design of the open flow channel 100 structure in the valve body 1 has no cavity 931 dead zone, no valve cavity trap, and no need for a special pressure relief discharge structure. The inner wall of the valve body 1, that is, the inner wall resistance of the flow channel 100 is relatively small. When the medium flows in the flow channel 100 of the open flow channel 100 structure, the attachments on the inner wall of the flow channel 100 can be flushed, fundamentally eliminating the medium residue in the flow channel 100. At the same time, most of the medium directly flows through the channel on the valve core 4, and when a small part flows through the spherical surface of the valve core 4, the spherical surface is flushed 360 degrees, and all the attachments on the valve core 4 are flushed away. Compared with the prior art, the present invention can effectively reduce the medium residue, thereby increasing the service life of the ball valve.

[0083] Embodiment 4:

[0084] This embodiment provides a top-mounted C-shaped wear-resistant ball valve, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features: the valve stem 3 and the valve core 4 are connected by a spline 8.

[0085] In this embodiment, the connection between the valve stem 3 and the valve core 4 via the spline 8 can effectively improve the stability of torque transmission, and the spline 8 has a better positioning effect, which can effectively prevent displacement between the valve stem 3 and the valve core 4, thereby improving the relative position stability between the valve stem 3 and the valve core 4.

[0086] Embodiment 5:

[0087] The present embodiment provides a top-mounted C-shaped wear-resistant ball valve, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features, including: a protective structure 9, which is arranged in the flow channel 100 and is located between the medium inlet 101 and the valve core 4, and the protective structure 9 is used to reduce the impact of the water hammer effect on the valve core 4.

[0088] The protection mechanism further includes: an annular movable groove 90, which is arranged on the inner wall of the flow channel 100 and is concentrically distributed with the flow channel 100, and is located between the medium inlet 101 and the valve core 4; a mounting ring 91, which is arranged in the annular movable groove 90 and is concentrically distributed with the annular movable groove 90; an energy absorbing member 92, which is arranged at the center of the mounting ring 91; a buffer connecting member, which includes a buffer connecting portion 93 and a friction transducer portion 94;

[0089] The mounting ring 91 is movably arranged in the annular movable groove 90 through a buffer connection piece.

[0090] Moreover, the energy absorbing member 92 is connected to the mounting ring 91 via a plurality of connecting rods which are evenly spaced along the circumference of the mounting ring 91 , one end of the connecting rod being connected to the mounting ring 91 , and the other end being connected to the energy absorbing member 92 .

[0091] In this embodiment, through the provision of the protective structure 9, the protective structure 9 can absorb the impact of the medium flow through the energy absorbing member 92 and buffer the impact through the buffer connecting member when the water hammer effect occurs, thereby effectively protecting the valve core 4 from direct impact of the medium, thereby reducing the phenomenon of damage to the valve core 4 due to impact and effectively improving the service life of the ball valve.

[0092] Embodiment 6:

[0093] This embodiment provides a top-mounted C-shaped wear-resistant ball valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the energy absorbing member 92 also includes: a deceleration rod 920, the head end of which faces the medium inlet 101, two variable-diameter spiral deceleration flow channels 921 are arranged in the deceleration rod 920, and a lateral jet port 922 is arranged on the side wall of the tail of the deceleration rod 920; a baffle plate 923, which is arranged at the head end of the deceleration rod 920, and a conical collecting groove 924 for absorbing the incoming flow medium is opened on the surface of the baffle plate 923 on the side facing the medium inlet 101;

[0094] Among them, the deceleration rod 920 is in the shape of a round rod with a constant diameter, the inlet end of the variable diameter spiral deceleration flow channel 921 is connected to the conical collecting groove 924, and the outlet end is connected to the lateral jet port 922. The radius of the variable diameter spiral deceleration flow channel 921 gradually increases from the head end to the tail end of the deceleration rod 920, and the two variable diameter spiral deceleration flow channels 921 are distributed in a winding shape.

[0095] In this embodiment, when the ball valve is opened, the medium flows normally and can pass through the energy absorbing member 92. At the same time, during the normal flow of the medium, the annular jet generated by the medium ejected from the lateral jet port 922 on the deceleration rod 920 can further cooperate with the ash removal ring 70 to flush the solid particles and powder accumulated on the preloaded disc spring 6, so that the solid particles and powder can be further cleaned. When the ball valve is closed, the medium produces a water hammer effect due to the rapid closure of the valve core 4, and the medium flow impact is transmitted from the medium inlet 101 to the valve core 4. When the medium flow impact moves to the baffle plate 923, the conical collection groove 924 on the baffle plate 923 can effectively collect most of the medium flow impact and guide the medium into the variable diameter spiral deceleration flow channel 921, and the remaining part of the medium flow impact is changed due to the obstruction of the baffle plate 923. The flow trajectory is changed, reducing the impact of directly flowing to the valve core 4 and reducing the intensity of the medium flow impact. After the medium enters the variable diameter spiral deceleration flow channel 921 The first half of the variable diameter spiral deceleration flow channel 921 can quickly collide with the inner wall of the variable diameter spiral deceleration flow channel 921 and reverse, thereby effectively dissipating the energy of the medium impact. As the radius of the second half of the variable diameter spiral deceleration flow channel 921 increases, the medium flow rate begins to slow down, and finally the medium is ejected from the lateral jet port 922 and forms an annular jet. At this time, the annular jet can further block the medium flow impact that is not collected by the conical collecting groove 924, thereby reducing the medium flow impact directly acting on the valve core 4. At the same time, the baffle plate 923 collects the medium flow impact and the medium flow impact is dissipated in the variable diameter spiral deceleration flow channel 921. A part of the impact is transmitted to the mounting ring 91 and the buffer connector, and the buffer connector can further dissipate the impact. Compared with the prior art, the present invention can effectively reduce the impact of the water hammer effect on the valve core 4, reduce the damage of the valve core 4 due to the impact, and improve the service life of the ball valve.

[0096] Embodiment 7:

[0097] This embodiment provides a top-mounted C-shaped wear-resistant ball valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the buffer connection part 93 also includes: a connecting column 930, in which a cavity 931 is provided; a piston group, which includes a front piston 932 and a rear piston 933 arranged in the cavity 931 at intervals; a movable rod 934, which is passed through the connecting column 930, and one end of the movable rod 934 is connected to the mounting ring 91, and the other end is connected to the front piston 932;

[0098] The front piston 932 and the rear piston 933 are both movably sealed and connected to the inner wall of the cavity 931 via a seal, and an inert gas is filled between the front piston 932 and the rear piston 933 .

[0099] The friction transducer unit 94 also includes: a linkage rack 940, which is arranged on the side wall of the rear piston 933 away from the front piston 932 and is distributed parallel to the axis of the connecting column 930; an outer shell 941, which is arranged on the side wall of the connecting column 930, and a friction layer 942 is arranged on the inner wall of the outer shell 941; a rotating column 943, which is rotatably arranged in the outer shell 941, and two extension rods 944 are symmetrically arranged on the side wall of the rotating column 943 along the radial direction of the rotating column 943; a friction block 945, which is movably arranged on the rotating column 943, and the outer surface of the friction block 945 is a friction surface that cooperates with the friction layer 942; a reset spring 946, which is sleeved on the rotating column 943, and the two ends of the reset spring 946 are respectively connected to the friction block 945 and the rotating column 943;

[0100] One end of the rotating column 943 extends into the cavity 931 of the connecting column 930 and is provided with a transmission gear 947 , and the linkage rack 940 is meshed with the transmission gear 947 .

[0101] Moreover, the connecting column 930 is cylindrical, and the cavity 931 is also cylindrical. The connecting column 930 is provided with a hole for the movable rod 934 to pass through and a plurality of air holes on the side facing the mounting ring 91. The end of the movable rod 934 away from the connecting column 930 is connected to the side wall of the mounting ring 91 facing away from the medium inlet 101. The end of the connecting column 930 away from the movable rod 934 is connected to the inner wall of the annular movable groove 90. The seal can be a conventional piston seal ring. The space in the cavity 931 on the side of the rear piston 933 away from the front piston 932 can also be filled with inert gas. There can be four extension rods 944, which are symmetrically distributed in pairs along the radial direction of the rotating column 943.

[0102] Moreover, the linkage rack 940 can be movably connected to the inner wall of the cavity 931 in a conventional manner, such as opening a movable groove on the linkage rack 940, installing a guide rod that cooperates with the movable groove in the cavity 931, and the guide rod movably passes through the movable groove, and the guide rod, the movable groove and the linkage rack 940 are all parallel to the axis of the connecting column 930.

[0103] In this embodiment, when the medium flow impact is transmitted to the mounting ring 91, the mounting ring 91 moves and drives the movable rod 934 to move into the connecting column 930, and the movable rod 934 moves to drive the front piston 932 to move. When the front piston 932 moves, it squeezes the inert gas between the front piston 932 and the rear piston 933. At this time, the rear piston 933 moves at the same time under the squeezing and drives the linkage rack 940 to move. The transmission gear 947 rotates with the movement of the linkage rack 940 and causes the rotating column 943 to rotate. As the rotating column 943 rotates, the extension rod 944 rotates and drives the friction block 945 to rotate. The friction block 945 overcomes the elastic force of the return spring 946 under the action of centrifugal force and moves toward the outer end of the extension rod 944 and finally makes the friction surface contact with the friction layer 942, thereby transferring the medium flow. The impact is converted into friction to dissipate energy. At the same time, the heat generated during the friction process can be taken away with the flow of the medium to prevent friction overheating. When the medium flow impact is large, the friction between the friction surface and the friction layer 942 increases due to the increase in centrifugal force, and the rear piston 933 is stuck. The setting of the front piston 932 and the rear piston 933 can effectively utilize the inert gas compression between the two to convert the rigid transmission into a flexible transmission, prevent the medium impact from being too large and causing damage to the buffer connector, and further buffer the medium flow impact through the inert gas compression between the two. Compared with the prior art, the present invention can effectively protect the medium flow impact caused by the water hammer effect, prevent the valve core 4 from being damaged due to the impact, and improve the service life of the ball valve.

[0104] Embodiment 8:

[0105] This embodiment provides a method for using a top-mounted C-shaped wear-resistant ball valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including the following steps:

[0106] The S1 valve is opened, the valve stem 3 is rotated to drive the valve core 4 to move, the valve core 4 moves and opens the flow channel 100, the medium enters the flow channel 100 from the medium inlet 101 and flows out from the medium outlet 102;

[0107] S2 ash unloading, the medium flows in the flow channel 100 after the valve is opened, and at the same time, under the action of the medium pressure, the solid particles or powder accumulated on the preload disc spring 6 can be taken away by the medium under the action of the ash unloading groove 71, and during the flow of the medium, the medium flushes the impurities along the sealing surface 360°, and when the medium flows in the flow channel 100 of the open flow channel 100 structure, it also flushes the attachments on the inner wall of the flow channel 100;

[0108] S3 valve is closed, the valve stem 3 is rotated to drive the valve core 4 to move, the valve core 4 moves and cooperates with the valve seat 5 to form a sealing surface 50, so as to close the flow channel 100, and when the valve core 4 approaches the valve seat 5, it scrapes away the particles on the surface of the valve seat 5;

[0109] S4 protection, when the valve is closed, water hammer effect occurs, the medium flows and impacts the protection structure 9, when the medium impacts and moves to the energy absorbing member 92, the main flow impact part of the medium is collected by the conical collecting groove 924 on the baffle plate 923, and the medium enters the variable diameter spiral deceleration flow channel 921 after being collected by the conical collecting groove 924. When the medium flows in the variable diameter spiral deceleration flow channel 921, it continuously turns and collides, and finally flows out from the lateral jet port 922;

[0110] S5 buffering, when the main impact of the medium is protected by the material blocking plate, the flow impact of the medium is transmitted from the energy absorbing member 92 to the mounting ring 91 and finally to the buffer connecting member, and the buffer connecting member buffers the impact through the buffer connecting part 93 and the friction transducer part 94.

[0111] In this embodiment, the operation method of the top-mounted C-shaped wear-resistant ball valve is simple. It only needs to drive the valve core 4 through the conventional valve stem 3. The ball valve can effectively maintain the sealing effect of the sealing surface 50 during use, and can prevent the pre-tightening disc spring 6 from failing due to the accumulation of solid particles or powder. At the same time, it can automatically protect against impact when the water hammer effect occurs, effectively protecting the valve core 4 from the impact, and further improving the service life of the ball valve.

[0112] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A top-entry C-shaped wear-resistant ball valve, comprising: A valve body (1), wherein a flow channel (100) is arranged in the valve body (1), and a medium inlet (101) and a medium outlet (102) respectively connected to the flow channel (100) are arranged on both sides of the valve body (1); A valve cover (2), wherein the valve cover (2) is arranged on the top end of the valve body (1); A valve stem (3), wherein the valve stem (3) is inserted into the valve cover (2); A valve core (4), the valve core (4) being arranged in the flow channel (100), and the valve core (4) being connected to the bottom end of the valve stem (3); A valve seat (5), the valve seat (5) being arranged in the flow channel (100) and being capable of cooperating with the valve core (4) to form a sealing surface (50), and a preloaded disc spring (6) being arranged between the valve seat (5) and the valve body (1); It is characterized by further comprising: An ash removal structure (7), the ash removal structure (7) being arranged between the preload disc spring (6) and the valve body (1) and used for cleaning solid particles accumulated and stuck around the preload disc spring (6); The sealing surface (50) formed by the cooperation between the valve seat (5) and the valve core (4) is located on the side facing away from the flow direction of the medium.

2. A top-entry C-shaped wear-resistant ball valve according to claim 1, characterized in that: The ash discharge structure (7) further comprises: An ash discharging ring (70), wherein the ash discharging ring (70) is provided with a plurality of ash discharging grooves (71); A plurality of ash discharge grooves (71) are evenly spaced and distributed along the circumference of the ash discharge ring (70), and the ash discharge grooves (71) are located on the side wall of the ash discharge ring (70) facing the preload spring.

3. A top-entry C-shaped wear-resistant ball valve according to claim 2, characterized in that: The flow channel (100) is an open flow channel (100) structure and the inner surface of the valve body (1) is streamlined.

4. A top-entry C-shaped wear-resistant ball valve according to claim 3, characterized in that: The valve stem (3) and the valve core (4) are connected via a spline (8).

5. A top-entry C-shaped wear-resistant ball valve according to claim 4, characterized in that: Also includes: A protective structure (9) is arranged in the flow channel (100) and located between the medium inlet (101) and the valve core (4), and the protective structure (9) is used to reduce the impact of the water hammer effect on the valve core (4).

6. A top-entry C-shaped wear-resistant ball valve according to claim 5, characterized in that: The protection agencies also include: an annular movable groove (90), the annular movable groove (90) being arranged on the inner wall of the flow channel (100) and being distributed concentrically with the flow channel (100), the annular movable groove (90) being located between the medium inlet (101) and the valve core (4); A mounting ring (91), wherein the mounting ring (91) is disposed in the annular movable groove (90) and is concentrically distributed with the annular movable groove (90); An energy absorbing member (92), wherein the energy absorbing member (92) is arranged at the center of the mounting ring (91); A buffer connection member, the buffer connection member comprising a buffer connection portion (93) and a friction transducer portion (94); Wherein, the mounting ring (91) is movably arranged in the annular movable groove (90) via a buffer connection piece.

7. A top-entry C-shaped wear-resistant ball valve according to claim 6, characterized in that: The energy absorbing member (92) further comprises: A deceleration rod (920), the head end of the deceleration rod (920) faces the medium inlet (101), two diameter-reducing spiral deceleration channels (921) are arranged in the deceleration rod (920), and a lateral jet port (922) is arranged on the side wall of the tail of the deceleration rod (920); A baffle plate (923), the baffle plate (923) being arranged at the head end of the deceleration rod (920), and a conical collecting groove (924) for absorbing incoming flow medium is provided on the surface of the baffle plate (923) on the side facing the medium inlet (101); The deceleration rod (920) is in the shape of a round rod with a constant diameter, the inlet end of the variable diameter spiral deceleration channel (921) is connected to the conical collecting groove (924), and the outlet end is connected to the lateral jet port (922), the radius of the variable diameter spiral deceleration channel (921) gradually increases from the head end to the tail end of the deceleration rod (920), and the two variable diameter spiral deceleration channels (921) are distributed in a winding shape.

8. A top-entry C-shaped wear-resistant ball valve according to claim 7, characterized in that: The buffer connection portion (93) further comprises: A connecting column (930), wherein a cavity (931) is provided in the connecting column (930); A piston group, the piston group comprising a front piston (932) and a rear piston (933) arranged in a spaced relationship in the cavity (931); A movable rod (934), the movable rod (934) is passed through the connecting column (930), one end of the movable rod (934) is connected to the mounting ring (91), and the other end is connected to the front piston (932); The front piston (932) and the rear piston (933) are both movably sealed and connected to the inner wall of the cavity (931) via a seal, and an inert gas is filled between the front piston (932) and the rear piston (933).

9. A top-entry C-shaped wear-resistant ball valve according to claim 8, characterized in that: The friction transducer (94) further comprises: A linkage rack (940), wherein the linkage rack (940) is arranged on a side wall of the rear piston (933) away from the front piston (932) and is distributed parallel to the axis of the connecting column (930); An outer shell (941), wherein the outer shell (941) is arranged on a side wall of the connecting column (930), and a friction layer (942) is arranged on an inner wall of the outer shell (941); A rotating column (943), the rotating column (943) is rotatably disposed in the outer shell (941), and two extension rods (944) are symmetrically disposed on the side wall of the rotating column (943) along the radial direction of the rotating column (943); A friction block (945), wherein the friction block (945) is movably disposed on the rotating column (943), and the outer surface of the friction block (945) is a friction surface that cooperates with the friction layer (942); A return spring (946), wherein the return spring (946) is sleeved on the rotating column (943), and two ends of the return spring (946) are respectively connected to the friction block (945) and the rotating column (943); One end of the rotating column (943) extends into the cavity (931) of the connecting column (930) and is provided with a transmission gear (947), and the linkage rack (940) is meshed with the transmission gear (947).

10. A method for using the top-loading C-shaped wear-resistant ball valve according to claim 8, characterized in that: The following steps are involved: The S1 valve is opened, the valve stem (3) is rotated to drive the valve core (4) to move, the valve core (4) moves and opens the flow channel (100), the medium enters the flow channel (100) from the medium inlet (101) and flows out from the medium outlet (102); S2 ash unloading, the medium flows in the flow channel (100) after the valve is opened, and at the same time, under the action of the medium pressure, the solid particles or powder accumulated on the preloaded disc spring (6) can be taken away by the medium under the action of the ash unloading groove (71), and during the flow of the medium, the medium flushes away the impurities along the sealing surface (50) at 360 degrees, and when the medium flows in the flow channel (100) of the open flow channel (100) structure, it also flushes away the attachments on the inner wall of the flow channel (100); The S3 valve is closed, and the valve stem (3) is rotated to drive the valve core (4) to move. The valve core (4) moves and cooperates with the valve seat (5) to form a sealing surface (50), thereby closing the flow channel (100). When the valve core (4) approaches the valve seat (5), it scrapes away particles on the surface of the valve seat (5); S4 protection, when the valve is closed, a water hammer effect occurs, the medium flows and impacts the protection structure (9), when the medium impacts and moves to the energy absorbing member (92), the main flow impact part of the medium is collected by the conical collection groove (924) on the baffle plate (923), the medium is collected by the conical collection groove (924) and then enters the variable diameter spiral deceleration flow channel (921), the medium continuously turns and collides while flowing in the variable diameter spiral deceleration flow channel (921), and finally flows out from the lateral jet port (922); S5 buffering, when the main impact of the medium is protected by the material blocking plate, the flow impact of the medium is transmitted from the energy absorbing member (92) to the mounting ring (91) and finally to the buffer connecting member, and the buffer connecting member buffers the impact through the buffer connecting part (93) and the friction transducer part (94).

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