A ball valve that is easy to clean and its use method

Abstract

The present invention relates to the technical field of valve bodies, and in particular to a ball valve that is easy to clean and a method for using the ball valve, comprising a valve body, a ball core and a valve stem, a drain pipe that is inclined downward is fixed to the side wall of the valve body, a pipe cover is fixedly installed at the end of the drain pipe, a spiral block is fixed to the inner wall of the valve body, a spiral groove that is slidably matched with the spiral block is opened on the side wall of the ball core, and the valve stem is movably connected to the ball core. When the valve stem is rotated to make the ball core rotate downward, the ball hole of the ball core is communicated with the drain pipe, and the ball hole is not communicated with the inlet pipe and the outlet pipe of the valve body; the present invention guides the rotation of the ball core through the cooperation of the limit block and the arc-shaped limit sliding groove, so that when the valve stem is rotated, the ball core rotates and moves downward, and the ball hole of the ball core is coaxially communicated with the drain pipe, so that the inner wall of the ball hole can be quickly cleaned through the drain pipe, the operation is simple, and the valve body does not need to be disassembled; at the same time, the ball hole is coaxially communicated with the drain pipe that is inclined downward, so that the sewage generated after cleaning can be quickly discharged.

Description

Technical Field

[0001] The invention relates to the technical field of valve bodies, and in particular to an easy-to-clean ball valve and a use method thereof. Background Art

[0002] The ball valve has the action of rotating 90 degrees. The plug body is a sphere with a circular through hole or channel passing through its axis. It is widely used in petrochemical pipelines. Since the crude oil, intermediate products and other media in petrochemicals have high viscosity, they are easy to adhere to the inner wall of the ball core. If the media on the inner wall of the ball core is not cleaned regularly, when the ball valve is in a closed state for a long time, the media adhering to the inner wall of the ball core will easily corrode the ball core, thereby reducing the service life of the ball core.

[0003] At present, the ball core is usually taken out to clean the inner wall thereof, but this cleaning method requires the ball valve to be disassembled and reassembled after the ball core is cleaned, which is complicated to operate and inconvenient to quickly clean the inner wall of the ball core. Summary of the invention

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides an easy-to-clean ball valve and a method of using the same, which can effectively solve the problem that the prior art is complicated to operate and inconvenient to quickly clean the inner wall of the ball core.

[0006] Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A ball valve that is easy to clean, comprises a valve body, a ball core and a valve stem, wherein a downwardly inclined sewage pipe is fixed to the side wall of the valve body, a pipe cover is fixedly installed at the end of the sewage pipe, a spiral block is fixed to the inner wall of the valve body, a spiral groove that slides with the spiral block is formed on the side wall of the ball core, and the valve stem is movably connected to the ball core. When the valve stem is rotated to make the ball core rotate downward, the ball hole of the ball core is communicated with the sewage pipe, and the ball hole is not communicated with the inlet pipe and outlet pipe of the valve body.

[0009] Furthermore, a valve seat which cooperates with the ball core in a sealing manner is slidably connected in the valve body, and a first elastic member is arranged between the valve seat and the valve body.

[0010] Furthermore, a groove is formed on the side wall of the ball core, and a sealing ring which is in sealing cooperation with the valve seat slides in the groove.

[0011] Furthermore, the groove is communicated with the spiral groove, and the sealing ring cooperates with the spiral block. When the ball hole of the ball core is communicated with the sewage pipe, the spiral block lifts the sealing ring so that the sealing ring is pressed against the side wall of the valve seat.

[0012] Furthermore, the side wall of the sealing ring is provided with a first wedge-shaped surface, and one end of the spiral block is provided with a second wedge-shaped surface matching with the first wedge-shaped surface.

[0013] Furthermore, a cleaning pipe coaxial with the sewage pipe is fixed to the side wall of the valve body.

[0014] Furthermore, a liquid guiding tube for guiding liquid is slidably arranged inside the sewage pipe and the cleaning pipe, a second elastic member is arranged between the liquid guiding tube and the inner wall of the sewage pipe or the cleaning pipe, and a pipe cover is fixedly installed at the end of the cleaning pipe.

[0015] Furthermore, a cleaning mechanism for cleaning the inner wall of the ball hole is fixedly installed at the end of the cleaning pipe.

[0016] Furthermore, the cleaning mechanism includes a pipe rack, a movable pair, a sliding tube and a cleaning head. A screw rod cooperating with the movable pair is rotatably connected inside the pipe rack. The sliding tube is slidably connected to the screw rod and rotatably connected to the movable pair. The cleaning head is fixedly installed at one end of the sliding tube. When the screw rod rotates, the movable pair drives the sliding tube to move along the axis direction of the pipe rack, so that the cleaning head rotates along the axis direction of the cleaning tube into the ball hole to clean the inner wall of the ball hole.

[0017] A method for using a ball valve that is easy to clean, the method is applicable to the above-mentioned ball valve that is easy to clean, and the method comprises the following steps:

[0018] S1. Turn the valve stem so that the ball hole of the ball core is connected to the sewage pipe;

[0019] S2, cleaning the inner wall of the ball hole;

[0020] S201, opening the pipe cover of the sewage pipe, and cleaning the inner wall of the ball hole through the sewage pipe;

[0021] S202, opening the pipe covers of the sewage pipe and the cleaning pipe, and cleaning the inner wall of the ball hole through the cleaning pipe;

[0022] S203, opening the pipe cover of the sewage pipe, and cleaning the inner wall of the ball hole by controlling the cleaning mechanism.

[0023] Beneficial Effects

[0024] Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects:

[0025] The present invention guides the rotation of the ball core through the cooperation of the limit block and the arc-shaped limit slide groove, so that when the valve stem rotates, the ball core rotates and moves downward, and the ball hole of the ball core is coaxially connected with the sewage pipe, so that the inner wall of the ball hole can be quickly cleaned through the sewage pipe, and the operation is simple and there is no need to disassemble the valve body; at the same time, the ball hole is coaxially connected with the sewage pipe inclined downward, so that the sewage generated after cleaning can be quickly discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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 prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram of the method of using the present invention is provided;

[0028] Figure 2 It is a schematic diagram of the overall first viewing angle structure of the first embodiment of the present invention;

[0029] Figure 3 It is a schematic diagram of the overall second viewing angle structure of the first embodiment of the present invention;

[0030] Figure 4 For the present invention Figure 3 A-A' cross-section structure schematic diagram;

[0031] Figure 5 For the present invention Figure 3 Schematic diagram of the structure of the B-B' section;

[0032] Figure 6 This is a schematic diagram of the overall explosion structure of the first embodiment of the present invention;

[0033] Figure 7 It is a schematic diagram of the internal structure of the half valve body of the present invention;

[0034] Figure 8 It is a schematic diagram of the core structure of the present invention;

[0035] Fig. 9 It is a schematic diagram of the overall structure of the second embodiment of the present invention;

[0036] Fig.10 It is a schematic diagram of the overall cross-sectional structure of the second embodiment of the present invention;

[0037] Fig.11 For the present invention Fig.10 The enlarged structural diagram at C in the middle;

[0038] Fig.12 It is a schematic diagram of the explosion structure of the cleaning mechanism of the present invention;

[0039] The numbers in the figure represent: 1. valve body; 101. drain pipe; 102. pipe cover; 1021. cover body; 1022. sealing plug; 103. spiral block; 1031. second wedge surface; 104. cleaning pipe; 105. half valve body; 106. guide rod groove; 107. conduit groove; 108. valve pipe; 2. ball core; 201. spiral groove; 202. ball hole; 203. groove; 204. arc-shaped limit slide groove; 3. valve stem; 301. limit block; 4. valve seat; 401. guide rod; 5. first elastic member; 6. sealing ring; 601. first wedge surface; 7. liquid guide pipe; 701. contact part; 702. guide part; 703. contact surface ;8. Second elastic member;9. Cleaning mechanism;901. Pipe rack;9011. Slide;902. Moving pair;9021. Slider;9022. Ring groove;903. Sliding pipe;904. Cleaning head;9041. Cleaning pipe;9042. Bracket;9043. Brush plate;9044. Spray hole;9045. Sealing head;905. Screw;9051. Guide slide groove;906. Mounting cover;9061. Top ring;907. Sleeve;9071. Sealing pipe end;908. End plate;909. Ball;910. Liquid inlet cleaning nozzle;911. Liquid outlet cleaning nozzle;912. Servo motor;10. Valve cover;11. Sealing packing. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0041] The present invention will be further described below in conjunction with the embodiments.

[0042] Embodiment 1

[0043] A ball valve of this embodiment is easy to clean, referring to Figure 2-8 : It includes a valve body 1, a ball core 2 and a valve stem 3; wherein the ball core 2 is movably connected in the valve body 1, and the valve stem 3 is movably connected to the ball core 2 and passes through the valve body 1.

[0044] Specifically, the valve body 1 is composed of two sets of half valve bodies 105 fixed to each other, so as to facilitate the installation of the ball core 2 in the valve body 1; Figure 2The valve stem 3 passes through the valve tube 108 and passes out of the valve body 1. A sealing filler 11 is placed between the top end of the valve tube 108 and the valve stem 3 for sealing between the valve tube 108 and the valve stem 3. The sealing filler 11 is fixed at the top end of the valve tube 108 through the valve cover 10.

[0045] A downwardly inclined sewage pipe 101 is fixed to the side wall of the valve body 1, and a pipe cover 102 is fixedly installed at the right end of the sewage pipe 101 for sealing the sewage pipe 101 to prevent the medium from leaking out of the sewage pipe 101 when the ball valve is in an open state.

[0046] A spiral block 103 is fixed to the inner wall of the valve body 1, and a spiral groove 201 is provided on the side wall of the ball core 2 to slide with the spiral block 103, wherein an arc-shaped limit slide groove 204 with a rectangular cross section is provided on the top wall of the ball core 2, and a rectangular limit block 301 is fixed to the bottom end of the valve stem 3 to slide and connect in the arc-shaped limit slide groove 204, so as to realize the movable connection between the valve stem 3 and the ball core 2; when the valve stem 3 rotates, the limit block 301 cooperates with the arc-shaped limit slide groove 204 to make the ball core 2 rotate, and at the same time, the spiral The cooperation between block 103 and spiral groove 201 allows the ball core 2 to rotate and be guided, so that the axis of the ball hole 202 of the ball core 2 tilts downward from the horizontal, that is, the ball core 2 rotates and moves downward, and finally makes the ball hole 202 of the ball core 2 coaxially connected with the sewage pipe 101. At this time, the ball hole 202 tilts downward. After that, the pipe cover 102 is removed, and the inner wall of the ball hole 202 is cleaned through the sewage pipe 101. The sewage generated after cleaning is discharged along the inclined ball hole 202 and the sewage pipe 101, which makes it easy to discharge the sewage.

[0047] The device guides the rotation of the ball core 2 through the cooperation of the limit block 301 and the arc-shaped limit groove 204, so that when the valve stem 3 rotates, the ball core 2 rotates and moves downward, and the ball hole 202 of the ball core 2 is coaxially connected with the sewage pipe 101, so that the inner wall of the ball hole 202 can be quickly cleaned through the sewage pipe 101, and the operation is simple without disassembling the valve body 1; at the same time, the ball hole 202 is coaxially connected with the sewage pipe 101 inclined downward, so that the sewage generated after cleaning can be quickly discharged.

[0048] Among them, the pipe cover 102 includes a cover body 1021 and a sealing plug 1022. The cover body 1021 is threadedly installed on the end of the sewage pipe 101, which is convenient for the installation and removal of the pipe cover 102. At the same time, the cooperation between the sealing plug 1022 and the sewage pipe 101 improves the sealing performance of the sewage pipe 101 and effectively prevents the medium from being discharged from the sewage pipe 101.

[0049] In order to improve the sealing performance of the ball valve in the closed state, a valve seat 4 that seals with the ball core 2 is slidably connected in the valve body 1; specifically, an annular valve seat 4 is slidably provided at the place where the inlet pipe of the valve body 1 communicates with its valve cavity and at the place where the outlet pipe of the valve body 1 communicates with its valve cavity, and a first elastic member 5 is provided between the valve seat 4 and the inner wall of the valve cavity. The first elastic member 5 is specifically a spring, which is used to elastically act on the valve seat 4 so that the valve seat 4 can press against the side wall of the ball core 2, thereby improving the sealing performance between the valve seat 4 and the ball core 2.

[0050] Among them, multiple groups of guide rods 401 are fixed to the side of the valve seat 4 away from the ball core 2, and multiple groups of guide rod grooves 106 that slide with the guide rods 401 are provided at the place where the inlet pipe of the valve body 1 is connected to its valve cavity and at the place where the outlet pipe of the valve body 1 is connected to its valve cavity, thereby guiding the movement of the valve seat 4 and realizing the sliding of the valve seat 4 in the valve body 1.

[0051] In order to further improve the sealing between the valve seat 4 and the ball core 2, a sealing ring 6 that seals with the valve seat 4 slides on the side wall of the ball core 2, and when the ball hole 202 of the ball core 2 is connected to the sewage pipe 101, the spiral block 103 lifts the sealing ring 6 so that the sealing ring 6 presses against the side wall of the valve seat 4.

[0052] Specifically, the side wall of the ball core 2 is symmetrically provided with grooves 203 adapted to the sealing ring 6. In the present technical solution, four groups of spiral grooves 201 are selected, which are arranged angularly symmetrically on the side wall of the ball core 2, and the spiral grooves 201 are all connected to the grooves 203. At the same time, the side wall of the sealing ring 6 is provided with a first wedge surface 601, and one end of the spiral block 103 is provided with a second wedge surface 1031 matched with the first wedge surface 601. When the valve stem 3 drives the ball core 2 to rotate, and makes the ball hole 202 coaxially communicate with the sewage pipe 101, at this time, the spiral block 103 pushes the sealing ring 6 toward the valve seat 4 through the cooperation of the second wedge surface 1031 and the first wedge surface 601, so that the sealing ring 6 is close to the valve seat 4, thereby improving the sealing between the sealing ring 6 and the valve seat 4, that is, improving the sealing between the valve seat 4 and the ball core 2.

[0053] To further facilitate cleaning of the inner wall of the ball hole 202 of the ball core 2, a cleaning pipe 104 coaxial with the sewage pipe 101 is fixed to the side wall of the valve body 1, so that the inner wall of the ball hole 202 can be cleaned through the cleaning pipe 104, and the sewage after cleaning can flow out of the sewage pipe 101.

[0054] A pipe cover 102 is also fixedly installed on the left end of the cleaning pipe 104 to prevent the medium from leaking out of the cleaning pipe 104 .

[0055] At the same time, a liquid guiding tube 7 for guiding liquid is slidably disposed in the sewage pipe 101 and the cleaning pipe 104 . Specifically, a conduit groove 107 is provided at the place where the sewage pipe 101 communicates with the valve cavity of the valve body 1 and at the place where the cleaning pipe 104 communicates with the valve cavity of the valve body 1. The liquid guiding tube 7 includes a contact portion 701 sliding in the conduit groove 107 and a guide portion 702 sliding in the sewage pipe 101 or the cleaning pipe 104. The inner diameters of the contact portion 701 and the guide portion 702 are the same as the inner diameter of the ball hole 202. At the same time, a second elastic member 8 is provided between the contact portion 701 and the conduit groove 107. The second elastic member 8 is specifically a spring, which is used to elastically act on the liquid guiding tube 7 so that the liquid guiding tube 7 presses against the side wall of the ball core 2 to improve the sealing between the liquid guiding tube 7 and the ball core 2. At the same time, a contact surface 703 matching the side wall of the ball core 2 is provided on the side of the contact portion 701 facing the ball core 2, thereby further improving the sealing between the liquid guiding tube 7 and the ball core 2, and allowing the sewage to be discharged through the liquid guiding tube 7 to avoid the sewage remaining between the ball core 2 and the inner wall of the valve cavity and causing medium pollution.

[0056] When the pipe cover 102 is threadedly fixed to the right end of the sewage pipe 101 and the left end of the cleaning pipe 104, the cover body 1021 contacts the guide part 702, so that the contact part 701 presses against the side wall of the ball core 2, further improving the sealing between the contact part 701 and the ball core 2.

[0057] Embodiment 2

[0058] See also Figure 9-12 Different from the above-mentioned first embodiment, in this embodiment, a cleaning mechanism 9 for cleaning the inner wall of the ball hole 202 is fixedly installed at the end of the cleaning tube 104, so as to automatically clean the inner wall of the ball hole 202, and then automatically and regularly clean it.

[0059] Specifically, the cleaning mechanism 9 includes a pipe rack 901, a movable pair 902, a sliding pipe 903 and a cleaning head 904; the pipe rack 901 is threadedly installed on the left end of the cleaning pipe 104 through the mounting cover 906, and a screw rod 905 that cooperates with the movable pair 902 is rotatably connected inside the pipe rack 901, and a servo motor 912 that drives the screw rod 905 to rotate is installed at the left end of the pipe rack 901. A sliding opening 9011 is opened on the side wall of the pipe rack 901, and a slider 9021 that slidably cooperates with the sliding opening 9011 is fixed to the side wall of the movable pair 902, so that when the servo motor 912 drives the screw rod 905 to rotate, the movable pair 902 moves along the axial direction of the pipe rack 901.

[0060] The sliding tube 903 is slidably connected to the screw rod 905 and is rotationally connected to the movable pair 902; specifically, a guide groove 9051 parallel to the axis of the screw rod 905 is opened on the side wall of the sliding tube 903, and a guide slide bar slidingly matched with the guide groove 9051 is fixed on the inner wall of the sliding tube 903 to guide the movement of the sliding tube 903. At the same time, a round ball groove 9022 is opened on the side wall of the movable pair 902, and an end plate 908 is fixed on the left end of the sliding tube 903. A plurality of groups of balls 909 sliding in the round ball groove 9022 are fixed on the left side wall of the end plate 908, thereby realizing the rotational connection between the sliding tube 903 and the movable pair 902.

[0061] The cleaning head 904 is fixedly installed on the right end of the sliding tube 903, and is connected to the movable pair 902 through rotation of the sliding tube 903, and is connected to the screw rod 905 through sliding. When the screw rod 905 rotates, the sliding tube 903 is rotated and moved along the screw rod 905, so that the cleaning head 904 enters the ball hole 202 to clean the inner wall of the ball hole 202.

[0062] Among them, the cleaning head 904 includes a cleaning tube 9041, and the side wall of the cleaning tube 9041 is provided with multiple groups of spray holes 9044 connected with the inner cavity. The right end of the sliding tube 903 is connected with the cleaning tube 9041 through a liquid outlet cleaning nozzle 911, and a liquid inlet cleaning nozzle 910 connected with the liquid outlet cleaning nozzle 911 is provided at the right end of the sliding tube 903. The liquid inlet cleaning nozzle 910 is connected with the pump body through a metal bellows. The pump body can be connected with cleaning liquid and pure water respectively. The pump body can be controlled to pump cleaning liquid first to clean the viscous medium adhering to the inner wall of the ball hole 202, and then pump pure water to flush the inner wall of the ball hole 202, thereby effectively improving the cleaning effect of the inner wall of the ball hole 202.

[0063] When the ball valve is in an open state, in order to effectively prevent the medium from leaking from the cleaning mechanism 9, a sleeve 907 is fixed on the right side of the mounting cover 906. The inner diameter of the sleeve 907 is smaller than the inner diameter of the ball hole 202, and the sleeve 907 is sealed in the liquid guide tube 7 in the cleaning tube 104. At the same time, a sealing tube end 9071 is provided at the right end of the sleeve 907, and a sealing head 9045 that seals with the sealing tube end 9071 is provided at the right end of the cleaning tube 9041.

[0064] Among them, a top ring 9061 is fixed on the side of the installation cover 906 close to the sleeve 907. When the installation cover 906 is threadedly installed on the left end of the cleaning tube 104, the top ring 9061 presses on the guide part 702 in the cleaning tube 104, thereby improving the sealing performance between the contact part 701 in the cleaning tube 104 and the ball core 2.

[0065] In order to further improve the cleaning effect of the cleaning head 904 on the inner wall of the ball hole 202, multiple groups of brackets 9042 are rotatably connected to the side wall of the cleaning head 904, and a torsion spring is arranged between the bracket 9042 and the side wall of the cleaning head 904. At the same time, a brush plate 9043 is rotatably connected to the other end of the bracket 9042, and the brush plate 9043 is provided with bristles; when the cleaning head 904 enters the ball hole 202 from the sleeve 907, the bracket 9042 is opened under the action of the torsion spring, so that the bristles of the brush plate 9043 contact the inner wall of the ball hole 202, and then through the rotation of the cleaning head 904, the bristles of the brush plate 9043 brush the inner wall of the ball hole 202.

[0066] A method for cleaning the ball valve, refer to Figure 1 The method of use is applicable to the above-mentioned easy-to-clean ball valve, and the method of use includes the following steps:

[0067] S1, rotating the valve stem 3, so that the ball hole 202 of the ball core 2 is connected to the sewage pipe 101;

[0068] S2, cleaning the inner wall of the ball hole 202;

[0069] S201, opening the pipe cover 102 of the sewage pipe 101, and cleaning the inner wall of the ball hole 202 through the sewage pipe 101;

[0070] S202, opening the pipe covers 102 of the sewage pipe 101 and the cleaning pipe 104, and cleaning the inner wall of the ball hole 202 through the cleaning pipe 104;

[0071] S203 , opening the pipe cover 102 of the sewage pipe 101 , and cleaning the inner wall of the ball hole 202 by controlling the cleaning mechanism 9 .

[0072] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ball valve that is easy to clean, comprising a valve body (1), a ball core (2) and a valve stem (3), characterized in that: A downwardly inclined sewage pipe (101) is fixed to the side wall of the valve body (1), a pipe cover (102) is fixedly mounted at the end of the sewage pipe (101), a spiral block (103) is fixed to the inner wall of the valve body (1), a spiral groove (201) slidably engaged with the spiral block (103) is formed on the side wall of the ball core (2), the valve stem (3) is movably connected to the ball core (2), when the valve stem (3) is rotated to rotate the ball core (2) downward, the ball hole (202) of the ball core (2) is connected to the sewage pipe (101), and the ball hole (202) is not connected to the inlet pipe and the outlet pipe of the valve body (1); the sliding connection inside the valve body (1) A valve seat (4) is connected to the ball core (3) and is in sealing cooperation with the ball core (3); a first elastic member (5) is arranged between the valve seat (4) and the inner cover of the valve body (1); a groove (203) is provided on the side wall of the ball core (2); a sealing ring (6) in sealing cooperation with the valve seat (4) slides in the groove (203); the groove (203) is communicated with the spiral groove (201), and the sealing ring (6) cooperates with the spiral block (103); when the ball hole (202) of the ball core (2) is communicated with the sewage pipe (101), the spiral block (103) lifts up the sealing ring (6) so that the sealing ring (6) presses against the side wall of the valve seat (4).

2. The easy-to-clean ball valve according to claim 1, characterized in that: The side wall of the sealing ring (6) is provided with a first wedge-shaped surface (601), and one end of the spiral block (103) is provided with a second wedge-shaped surface (1031) that matches the first wedge-shaped surface (601).

3. The easy-to-clean ball valve according to claim 1, characterized in that: A cleaning pipe (104) coaxial with the sewage discharge pipe (101) is also fixed to the side wall of the valve body (1).

4. The easy-to-clean ball valve according to claim 3, characterized in that: A liquid guiding tube (7) for guiding liquid is slidably disposed inside the sewage pipe (101) and the cleaning pipe (104); a second elastic member (8) is disposed between the liquid guiding tube (7) and the inner wall of the sewage pipe (101) or the cleaning pipe (104); and a pipe cover (102) is fixedly mounted on the end of the cleaning pipe (104).

5. The easy-to-clean ball valve according to claim 3, characterized in that: A cleaning mechanism (9) for cleaning the inner wall of the ball hole (202) is fixedly mounted on the end of the cleaning tube (104).

6. The easy-to-clean ball valve according to claim 5, characterized in that: The cleaning mechanism (9) comprises a pipe rack (901), a movable pair (902), a sliding pipe (903) and a cleaning head (904); a screw rod (905) cooperating with the movable pair (902) is rotatably connected inside the pipe rack (901); the sliding pipe (903) is slidably connected to the screw rod (905) and rotatably connected to the movable pair (902); the cleaning head (904) is fixedly mounted on one end of the sliding pipe (903); when the screw rod (905) rotates, the movable pair (902) drives the sliding pipe (903) to move along the axis direction of the pipe rack (901), so that the cleaning head (904) rotates along the axis direction of the cleaning pipe (104) to enter the ball hole (202) and clean the inner wall of the ball hole (202).

Images