Built-in ball valve

Abstract

A built-in ball valve comprises a valve body, a water inlet connector arranged at the left end of the valve body and a water outlet connector arranged at the right end of the valve body, an opening and closing cavity is formed in the valve body, a spherical opening and closing piece matched with the opening and closing cavity is arranged in the opening and closing cavity, a water through hole axially penetrating through the spherical opening and closing piece is formed in the middle of the spherical opening and closing piece, and a valve rod is arranged at the upper end of the spherical opening and closing piece. The upper end of the valve rod upwards penetrates out of the valve body and is provided with a handle, and a square inserting groove is formed in the center of the upper surface of the spherical opening and closing piece. The center of the lower end face of the valve rod is provided with an inserting head matched with the inserting groove. A lug piece is arranged between the lower end face of the valve rod and the upper surface of the spherical opening and closing piece. The lug piece is in a melon seed shape. According to the built-in ball valve, resistance borne by the ball-shaped opening and closing piece during rotation can be effectively reduced, the situation that the connecting plug is abraded due to overlarge force can be avoided, and therefore the situation that the rotating angle of the ball-shaped opening and closing piece is increased due to the fact that the connecting plug is abraded is avoided.

Description

Technical Field

[0001] The utility model relates to a ball valve, in particular to a built-in ball valve. Background Art

[0002] A ball valve is a valve that uses a ball-shaped opening and closing part to open and close. When the ball valve is open, the water inlet joint and the water outlet joint at both ends of the ball valve are connected through the ball-shaped opening and closing part. When the ball valve needs to be closed, the valve stem can be rotated by the handle. At this time, the ball-shaped opening and closing part rotates ninety degrees under the drive of the valve stem, and the ball-shaped opening and closing part can be sealed by the inner wall of the opening and closing cavity in the ball valve body, thereby disconnecting the connection between the water inlet joint and the water outlet joint, and realizing the closing of the ball valve.

[0003] Therefore, it can be seen that it is necessary to ensure that the ball-type opening and closing member is accurately rotated ninety degrees to achieve complete closure of the ball valve. If the rotation angle is greater than ninety degrees or less than ninety degrees, the ball-type opening and closing member can still play the role of connecting the water inlet joint and the water outlet joint. In order to ensure that the ball-type opening and closing member can accurately rotate ninety degrees under the drive of the valve stem, a limiting structure will be set on the ball valve. The built-in ball valve actually refers to a ball valve with a built-in limiting structure. The limiting structure of the built-in ball valve is to set a limiting hole in the valve body, and symmetrical limiting grooves are set on both sides of the limiting hole. The limiting grooves are arc-shaped, and the lower end of the valve stem is The two ends of the adapting plug connector are respectively located in the limit grooves on both sides of the limit hole. The plug connector can rotate along the inner wall track of the limit groove to an angle of exactly ninety degrees. Once rotated into place, the handle cannot drive the valve stem to rotate, thereby ensuring that the valve stem can drive the ball-type opening and closing part to rotate accurately ninety degrees. Therefore, when the valve stem drives the ball-type opening and closing part to rotate, there is constant friction between the plug connector and the inner wall of the limit groove. In this case, the resistance when the valve stem drives the ball-type opening and closing part to rotate will increase, resulting in a heavier force being applied to the handle each time to turn the handle, which ultimately makes the opening and closing process of the ball valve laborious.

[0004] When the ball valve is opened and closed with great effort, the user will subconsciously apply extremely heavy force to the handle, causing the plug connector to violently collide with the groove walls at both ends of the limit groove every time it is rotated into place. Therefore, as the ball valve is opened and closed for a long time through the ball-type opening and closing member, it is very easy to cause the plug connector and the groove walls at both ends of the limit groove to wear. Once wear occurs, the stroke that the plug connector can rotate along the limit groove becomes longer, thereby causing the rotation angle of the ball-type opening and closing member to become larger, and ultimately causing the ball valve to be unable to be completely closed or fully opened, posing a risk of leakage. Summary of the Invention

[0005] The utility model aims to solve the existing technical problem by providing a built-in ball valve, which can not only effectively reduce the resistance encountered by the ball-type opening and closing member during rotation, but also avoid the situation where the plug joint is worn due to excessive force, thereby avoiding the situation where the rotation angle of the ball-type opening and closing member becomes larger due to the wear of the plug joint.

[0006] The technical solution adopted by the utility model to solve the above technical problems is:

[0007] The utility model discloses a built-in ball valve, comprising a valve body, a water inlet joint provided at the left end of the valve body, and a water outlet joint provided at the right end of the valve body; an opening and closing cavity is provided in the valve body, a spherical opening and closing member matching therewith is provided in the opening and closing cavity, a water through-hole axially penetrating the spherical opening and closing member is provided in the middle part, a valve stem is provided at the upper end of the spherical opening and closing member, the upper end of the valve stem is upwardly extended out of the valve body and is provided with a handle; a square plug-in groove is provided at the center of the upper surface of the spherical opening and closing member; a plug-in joint matching the plug-in groove is provided at the center of the lower end face of the valve stem; a lever piece is provided between the lower end face of the valve stem and the upper surface of the spherical opening and closing member; the lever piece is in the shape of a melon seed. ; The two ends of the lever piece respectively have a fixed end and a movable end, and the diameter of the fixed end is larger than the diameter of the movable end; a square hole is provided in the center of the fixed end, and the plug connector passes through the square hole; a groove is provided in the center of the upper surface of the valve body; a sealing cover is provided on the upper notch cover of the groove; a limiting hole is provided in the center of the bottom of the groove, which is connected to the opening and closing cavity; the left and right sides of the limiting hole have symmetrical limiting planes; when the movable end of the lever piece contacts one of the limiting planes, the water inlet joint and the water outlet joint are both coaxial with the water hole; there is a movable gap between the movable end and the front side wall of the limiting hole or the rear side wall of the limiting hole.

[0008] The outer wall of the movable end is a curved surface.

[0009] A rotation hole matching the valve stem is provided in the center of the sealing cover; a plurality of annular grooves evenly distributed axially are provided on the outer wall of the portion of the valve stem located in the rotation hole; an O-ring matching the annular groove is provided in the annular groove.

[0010] The end of the water outlet joint and the end of the water inlet joint both expand outward to form an annular protrusion; an annular sealing groove is provided in the annular protrusion; and a sealing ring matching the sealing groove is provided in the sealing groove.

[0011] The water inlet joint port and the water outlet joint port are both provided with end covers that match them; the outer wall of the end cover presses the sealing ring into the sealing groove, and the sealing ring is made of rubber; a limiting portion is provided on the outer wall of the end of the end cover away from the valve body; the outer end face of the limiting portion is provided with a trumpet-shaped protective portion, and the outer diameter and inner diameter of the protective portion gradually increase toward the valve body; the limiting portion fits with the end face of the water outlet joint and the end face of the water inlet joint; the inner wall of the protective portion fits with the outer wall of the annular protrusion.

[0012] An outer wall of one end of the end cover adjacent to the valve body is provided with an introduction cone surface, and the diameter of the introduction cone surface gradually decreases toward the center of the valve body.

[0013] The beneficial effects of the utility model are:

[0014] Compared with the prior art, the built-in ball valve adopts the structure of the present invention, which can limit the rotation angle of the lever plate to ninety degrees through the limiting planes on the left and right sides of the limiting hole, thereby limiting the rotation angle of the valve stem through the lever plate, ensuring that the handle will be restricted after driving the valve stem to rotate ninety degrees, thereby accurately controlling the rotation of the ball-type opening and closing member by ninety degrees, and realizing the complete closing and complete opening of the ball valve. At the same time, there is a movable gap between the movable end and the front side wall of the limiting hole or the rear side wall of the limiting hole. The existence of the movable gap can ensure that no friction occurs when the lever plate rotates, effectively avoiding the situation where friction generates resistance and causes difficulty in rotating the valve stem. Therefore, the user can easily rotate the valve stem through the handle, so that the user will only apply a small force when subconsciously rotating the handle, effectively avoiding the situation where the user uses too much force, causing the lever plate to collide violently with the limiting planes on both sides of the limiting hole, thereby causing wear, and avoiding the situation where the rotation angle of the lever plate changes due to wear to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a cross-sectional view of the built-in ball valve of the utility model;

[0016] Figure 2 This is a structural diagram of the built-in ball valve of the utility model;

[0017] Figure 3 This is a structural diagram when the bracket is in the limiting hole;

[0018] Figure 4 It is a structural diagram of the assembly of the valve stem and the ball-type opening and closing member;

[0019] Figure 5 It is a structural diagram of the assembly of the valve stem and the valve plate;

[0020] Figure 6 This is a cross-sectional view of the inlet and outlet joints of the built-in ball valve of the utility model when both are equipped with end covers;

[0021] Figure 7 yes Figure 6 An enlarged view of part A;

[0022] Figure 8 The utility model is a structural schematic diagram of a built-in ball valve in which both the water inlet joint and the water outlet joint are equipped with end covers. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0024] See also Figures 1 to 8The utility model provides a built-in ball valve, comprising a valve body 1, a water inlet joint 2 provided at the left end of the valve body 1, and a water outlet joint 3 provided at the right end of the valve body 1. An opening and closing cavity 4 is provided in the valve body 1, and a spherical opening and closing member 5 matching therewith is provided in the opening and closing cavity 4. A water through-hole 6 is provided axially through the middle of the spherical opening and closing member 5, and a valve stem 7 is provided at the upper end of the spherical opening and closing member 5. The upper end of the valve stem 7 extends upward to the outside of the valve body 1 and is provided with a handle 8. A square plug-in groove 9 is provided at the center of the upper surface of the spherical opening and closing member 5; a plug-in joint 10 matching the plug-in groove 9 is provided at the center of the lower end surface of the valve stem 7; a lever piece 11 is provided between the lower end surface of the valve stem 7 and the upper surface of the spherical opening and closing member 5; the lever piece 11 is in the shape of a melon seed; both ends of the lever piece 11 have fixed ends 1 101 and the movable end 1102, the diameter of the fixed end 1101 is larger than the diameter of the movable end 1102; a square hole 1103 is provided in the center of the fixed end 1101, and the plug connector 10 passes through the square hole 1103; a groove 12 is provided in the center of the upper surface of the valve body 1; a sealing cover 16 is covered on the upper notch of the groove 12; a limiting hole 13 is provided in the center of the bottom of the groove 12 and communicates with the opening and closing cavity 4; the limiting hole 13 has symmetrical limiting planes 14 on both sides; when the movable end of the lever 11 contacts one of the limiting planes 14, the water inlet connector 2 and the water outlet connector 3 are both coaxial with the water hole 6; there is a movable gap 15 between the movable end 1102 and the front side wall of the limiting hole 13 or the rear side wall of the limiting hole 13.

[0025] The outer wall of the movable end 1102 is a curved surface.

[0026] The sealing cover 16 has a rotation hole 17 in the center thereof, which matches the valve stem 7 . The outer wall of the valve stem 7 in the rotation hole 17 is provided with a plurality of annular grooves 18 evenly distributed in the axial direction. An O-ring 19 matching the annular groove 18 is provided in the annular groove 18 .

[0027] An annular protrusion 20 is expanded outward from the end of the water outlet joint 3 and the end of the water inlet joint 2. An annular sealing groove 26 is provided in the annular protrusion 20. A matching sealing ring 21 is provided in the sealing groove 26.

[0028] The ports of the water inlet joint 2 and the water outlet joint 3 are both provided with end covers 22 that match them; the outer wall of the end cover 22 presses the sealing ring 21 into the sealing groove 26, and the sealing ring 21 is made of rubber; the outer wall of the end cover 22 away from the valve body is provided with a limiting portion 23; the outer end face of the limiting portion 23 is provided with a trumpet-shaped protective portion 24, and the outer diameter and inner diameter of the protective portion 24 gradually increase toward the valve body 1; the limiting portion 23 is in contact with the end face of the water outlet joint 3 and the end face of the water inlet joint 2; the inner wall of the protective portion 24 is in contact with the outer wall of the annular protrusion 20.

[0029] The outer wall of one end of the end cover 22 adjacent to the valve body 1 has an introduction cone 25 , and the diameter of the introduction cone 25 gradually decreases toward the center of the valve body 1 .

[0030] The method of using the utility model is as follows:

[0031] When the ball valve is fully opened, the water inlet joint 2 and the water outlet joint 3 are both coaxial with the water hole 6. At this time, the water flow in the pipe connected to the water inlet joint 2 will flow through the water inlet joint 2, the water hole 6, and the water outlet joint 3 in sequence into the pipe connected to the water outlet joint 3 for use.

[0032] When the ball valve needs to be closed, the valve stem 7 can be rotated by the handle 8. Since the plug groove 9 and the square hole 1103 are matched with the plug connector 10, when the valve stem 7 rotates, the lever piece 11 rotates synchronously with the ball-type opening and closing member 5. When the ball-type opening and closing member 5 rotates, the angles of the openings at both ends of the water hole 6 will change. When the water hole 6 rotates ninety degrees with the ball-type opening and closing member 5, the openings at both ends of the water hole 6 will be completely opposite to the inner wall of the opening and closing cavity 4, so that the openings at both ends of the water hole 6 are shielded and sealed by the inner wall of the opening and closing cavity 4. At this time, the water flow will be trapped in the water inlet joint. 2, which has the effect of closing the ball valve. When the ball valve is fully opened, the movable end of the lever piece 11 fits with the limiting plane 14 on one of the left and right sides of the limiting hole 13. When the lever piece 11 rotates ninety degrees along with the valve stem 7, the movable end of the lever piece 11 fits with the limiting plane 14 on the other side of the limiting hole 13. The limiting plane 14 limits the lever piece 11 from continuing to rotate, thereby accurately controlling the lever piece 11 to rotate ninety degrees, ensuring that the ball-type opening and closing member 5 can achieve the effect of fully opening and closing the ball valve by accurately rotating ninety degrees.

[0033] In summary, it can be seen that the present invention can limit the rotation angle of the lever plate 11 to ninety degrees through the limiting planes 14 on the left and right sides of the limiting hole 13, thereby limiting the rotation angle of the valve stem 7 through the lever plate 11, ensuring that the handle 8 will be restricted after driving the valve stem 7 to rotate ninety degrees, thereby accurately controlling the rotation of the ball-type opening and closing member 5 by ninety degrees, and realizing the complete closing and complete opening of the ball valve. At the same time, there is a movable gap 15 between the movable end 1102 and the front side wall of the limiting hole 13 or the rear side wall of the limiting hole 13. The existence of the movable gap 15 can ensure that no friction occurs when the lever plate 11 rotates, effectively avoiding the situation where friction generates resistance and causes the valve stem 7 to rotate with difficulty. Therefore, the user can easily rotate the valve stem 7 through the handle 8, so that the user only applies a small force when subconsciously rotating the handle 8, effectively avoiding the situation where the user applies too much force, causing the lever plate 11 to collide violently with the limiting planes 14 on both sides of the limiting hole 13, thereby causing wear, and avoiding the situation where the rotation angle of the lever plate 11 changes due to wear to the greatest extent.

[0034] The outer wall of the movable end 1102 is an arc surface. The smooth arc surface can minimize the friction when the movable end of the lever piece 11 contacts the limiting plane 14, further avoiding wear of the movable end of the lever piece 11 and extending the service life of the lever piece 11.

[0035] A rotating hole 17 matching the valve stem 7 is provided in the center of the sealing cover 16. The outer wall of the portion of the valve stem 7 located in the rotating hole 17 is provided with a plurality of annular grooves 18 uniformly distributed in the axial direction. An O-ring 19 matching it is provided in the annular groove 18. The presence of the groove 12 facilitates the processing of the limiting hole 13, and the presence of the sealing cover 16 can ensure the sealing of the upper notch of the groove 12. The sealing cover 16 can be fixed to the upper notch of the groove 12 by screws or threaded connections, and the presence of the O-ring 19 can effectively ensure the sealing between the outer wall of the valve stem 7 and the inner wall of the rotating hole 17.

[0036] When the ball valve is in use, in addition to the situation where the ball-type opening and closing member 5 does not rotate into place and causes internal water leakage, there is also the situation of water leakage at the connection position between the water outlet joint 3, the water inlet joint 2 and the pipeline. The ends of the water outlet joint 3 and the water inlet joint 2 both expand outward to form an annular protrusion 20, and the annular protrusion 20 has an annular sealing groove 26, and the sealing groove 26 is provided with a sealing ring 21 that matches it. When the water outlet joint 3 and the water inlet joint 2 need to be connected to the pipeline, the pipeline end can be directly inserted into the water outlet joint 3 and the water inlet joint 2. At this time, the sealing ring 21 is sleeved on the outside of the pipeline, and then the annular protrusion 20 can be squeezed inward by a special hydraulic tool to firmly press the sealing ring 21 on the outer wall of the pipeline, which can not only ensure the stability between the water outlet joint 3, the water inlet joint 2 and the pipeline, but also ensure the sealing of the water outlet joint 3, the water inlet joint 2 when connected to the pipeline, thereby achieving a leak-proof effect.

[0037] The water inlet joint 2 port and the water outlet joint 3 port are both provided with an end cover 22 that matches them. The outer wall of the end cover 22 presses the sealing ring 21 into the sealing groove 26. The sealing ring 21 is made of rubber. The outer wall of the end cover 22 away from the valve body 1 is provided with a limit portion 23. The outer end face of the limit portion 23 is provided with a trumpet-shaped protective portion 24. The outer diameter and inner diameter of the protective portion 24 gradually increase toward the valve body 1. The limit portion 23 fits the end face of the water outlet joint 3 and the end face of the water inlet joint 2. The inner wall of the protective portion 24 is in contact with the annular The outer walls of the protrusion 20 fit together, and the presence of the protective portion 24 can enclose most of the annular protrusion 20, while increasing the actual thickness of the annular protrusion 20 in disguise, thereby preventing the annular protrusion 20 from being deformed by being squeezed by foreign objects during transportation of the ball valve. At the same time, the outer wall of the end cover 22 can form a support inside the annular protrusion 20, further preventing the annular protrusion 20 from being deformed. When the water inlet joint 2 and the water outlet joint 3 of the ball valve need to be connected to the pipeline, the end cover 22 can be directly removed.

[0038] The outer wall of one end of the end cover 22 adjacent to the valve body 1 has an introduction cone 25, and the diameter of the introduction cone 25 gradually decreases toward the center of the valve body 1. The existence of the introduction cone 25 facilitates the rapid insertion of the end cover 22 into the water inlet connector 2 and the water outlet connector 3, thereby ensuring the assembly efficiency of the end cover 22.

Claims

1. A built-in ball valve, comprising a valve body, a water inlet connector located at the left end of the valve body, and a water outlet connector located at the right end of the valve body; an opening and closing chamber is provided in the valve body, a matching spherical opening and closing member is provided in the opening and closing chamber, a water through-hole is provided in the middle of the spherical opening and closing member axially extending through the member, a valve stem is provided at the upper end of the spherical opening and closing member, the upper end of the valve stem extends upwardly out of the valve body and is provided with a handle, characterized in that: A square plug-in groove is provided in the center of the upper surface of the ball-type opening and closing part; a plug connector matching the plug-in groove is provided in the center of the lower end surface of the valve stem; a lever piece is provided between the lower end surface of the valve stem and the upper surface of the ball-type opening and closing part; the lever piece is in the shape of a melon seed; the two ends of the lever piece respectively have a fixed end and a movable end, and the diameter of the fixed end is larger than the diameter of the movable end; a square hole is provided in the center of the fixed end, and the plug connector passes through the square hole; a groove is provided in the center of the upper surface of the valve body; a sealing cover is provided on the upper notch cover of the groove; a limiting hole that communicates with the opening and closing cavity is provided in the center of the bottom of the groove; the limiting hole has symmetrical limiting planes on both sides; when the movable end of the lever piece contacts one of the limiting planes, the water inlet joint and the water outlet joint are both coaxial with the water hole; there is a movable gap between the movable end and the front side wall of the limiting hole or the rear side wall of the limiting hole.

2. The built-in ball valve according to claim 1, characterized in that: The outer wall of the movable end is a curved surface.

3. The built-in ball valve according to claim 1, characterized in that: A rotation hole matching the valve stem is provided in the center of the sealing cover; a plurality of annular grooves evenly distributed axially are provided on the outer wall of the portion of the valve stem located in the rotation hole; an O-ring matching the annular groove is provided in the annular groove.

4. The built-in ball valve according to claim 1, characterized in that: The end of the water outlet joint and the end of the water inlet joint both expand outward to form an annular protrusion; an annular sealing groove is provided in the annular protrusion; and a sealing ring matching the sealing groove is provided in the sealing groove.

5. The built-in ball valve according to claim 4, characterized in that: The water inlet joint port and the water outlet joint port are both provided with end covers that match them; the outer wall of the end cover presses the sealing ring into the sealing groove, and the sealing ring is made of rubber; a limiting portion is provided on the outer wall of the end of the end cover away from the valve body; the outer end face of the limiting portion is provided with a trumpet-shaped protective portion, and the outer diameter and inner diameter of the protective portion gradually increase toward the valve body; the limiting portion fits with the end face of the water outlet joint and the end face of the water inlet joint; the inner wall of the protective portion fits with the outer wall of the annular protrusion.

6. The built-in ball valve according to claim 5, characterized in that: An outer wall of one end of the end cover adjacent to the valve body is provided with an introduction cone surface, and the diameter of the introduction cone surface gradually decreases toward the center of the valve body.

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