Ball valve

Abstract

The utility model relates to the field of ball valves, and discloses a ball valve which comprises a valve body, a valve core is arranged in the valve body, the valve core is in sliding fit with the valve body, the top of the valve core is fixedly connected with a valve rod, the valve rod penetrates out of the top of the valve body, the valve rod is rotatably connected with the valve body, the top end of the valve rod is fixedly sleeved with a worm gear, and a protective shell is arranged on the outer side of the worm gear. The protective shell is fixedly connected with the top of the valve body, a worm is arranged in the protective shell, located on the right side of the worm gear and meshed with the worm gear, the outer walls of the front end and the rear end of the worm are rotationally connected with fixing plates, the fixing plates downwards extend to penetrate through the protective shell, the bottom ends of the fixing plates are fixedly connected with the valve body, and the outer walls of the fixing plates are fixedly connected with the protective shell. The front end of the worm penetrates out of the front side fixing plate, and the outer wall of the front end of the worm is fixedly sleeved with a first gear. High-precision adjustment of the valve element is achieved through the worm and gear transmission mechanism, worm and gear transmission has self-locking performance, the stability of the position of the valve element can be kept to a certain degree, and the adjustment precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of ball valve, specifically is a ball valve. BACKGROUND

[0002] Ball valve is a kind of valve that controls fluid on-off by rotating ball, due to its simple structure, flexible operation, small flow resistance, reliable sealing and other characteristics, it is widely used in petroleum, chemical industry, electric power, water treatment and natural gas and other fields.

[0003] Current ball valve adjustment mode often depends on manual rotation valve stem, due to the limitation of human operation, it is difficult to realize high-precision flow regulation, especially in the occasion needing accurate flow control, operator often cannot intuitively understand the opening of valve core, can only regulate flow by experience or trial and error method. CONTENT OF THE UTILITY MODEL

[0004] In order to overcome the above-mentioned insufficient, the utility model provides a kind of ball valve.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A kind of ball valve, including valve body, valve body has valve core, valve core is slidably connected with valve body, the top of valve core is fixedly connected with valve stem, valve stem penetrates out the top of valve body, valve stem is rotatably connected with valve body, the top end of valve stem is fixedly sleeved with worm wheel, the outside of worm wheel has protective shell, protective shell is fixedly connected with the top of valve body, protective shell has worm in it, worm is located at the right side of worm wheel, worm is engaged with worm wheel, the front and back end outer wall of worm is rotatably connected with fixed plate, fixed plate extends downward and penetrates protective shell, the bottom end of fixed plate is fixedly connected with valve body, the outer wall of fixed plate is fixedly connected with protective shell, the front end of worm penetrates out the front fixed plate, the front end outer wall of worm is fixedly sleeved with gear one, the inside front side of protective shell has gear two, gear two is rotatably connected with the front side inner wall of protective shell by means of plane bearing, gear two is engaged with gear one, the front side wall middle part of gear two is fixedly inserted with rotating shaft, the front end of rotating shaft penetrates out the front side wall of protective shell, the rear end outer wall of rotating shaft is rotatably connected with protective shell by means of rolling bearing, the front end of rotating shaft is fixedly connected with rotating handle, the front side wall of protective shell is provided with scale slot, scale slot is distributed at equal angles around rotating shaft, the outer wall of rotating shaft is fixedly connected with pointer, pointer is located at the front side of protective shell, and pointer points to scale slot.

[0007] The utility model has the advantages of:

[0008] The utility model realizes the high-precision regulation of valve core by worm and worm gear transmission mechanism, worm and worm gear transmission has self-locking property, can keep the stability of valve core position to a certain extent, and improve the regulation accuracy.

[0009] The scale groove of the protective shell surface cooperates with the pointer on the rotating shaft, realizes visual control of the flow, and the operator can visually see the opening of the valve core, thereby more accurately adjusting the flow. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a structural schematic diagram of the utility model;

[0011] Figure 2 is a protective shell and valve body cross-sectional schematic diagram of the utility model;

[0012] Figure 3 is Figure 2 left side view schematic diagram;

[0013] Figure 4 is a valve body cross-sectional schematic diagram of the utility model.

[0014] In all drawings, the specific reference signs are as follows: 1, valve body; 2, valve core; 3, valve rod; 4, worm gear; 5, protective shell; 6, fixed plate; 7, worm; 8, gear one; 9, rotating shaft; 10, rolling bearing; 11, gear two; 12, plane bearing; 13, rotating handle; 14, scale groove; 15, pointer. DETAILED DESCRIPTION

[0015] As Figures 1-4 shown: a ball valve, including valve body 1, valve body 1 has valve core 2, valve core 2 and valve body 1 sliding fit, the top of valve core 2 is fixedly connected valve rod 3, valve rod 3 penetrates out valve body 1 top, valve rod 3 and valve body 1 rotationally connected, the top of valve rod 3 is fixedly sleeved worm gear 4, the outside of worm gear 4 has protective shell 5, protective shell 5 and valve body 1 top fixedly connected, protective shell 5 has worm 7 in it, worm 7 is located worm gear 4 right side, worm 7 and worm gear 4 are engaged, the front and rear end outer wall of worm 7 are rotationally connected fixed plate 6, fixed plate 6 extends downward and penetrates protective shell 5, the bottom of fixed plate 6 and valve body 1 fixedly connected, the outer wall of fixed plate 6 and protective shell 5 fixedly connected, the front end of worm 7 penetrates out front fixed plate 6, the front end outer wall of worm 7 is fixedly sleeved gear one 8, the inside front side of protective shell 5 has gear two 11, gear two 11 is rotationally connected with the front side inner wall of protective shell 5 through plane bearing 12, gear two 11 and gear one 8 are engaged, the front side wall middle part of gear two 11 is fixedly inserted rotating shaft 9, the front end of rotating shaft 9 penetrates out the front side wall of protective shell 5, the rear end outer wall of rotating shaft 9 is rotationally connected with protective shell 5 through rolling bearing 10, the front end of rotating shaft 9 is fixedly connected rotating handle 13, the front side wall of protective shell 5 is provided with scale groove 14, scale groove 14 is distributed at equal angles around rotating shaft 9, the outer wall of rotating shaft 9 is fixedly connected pointer 15, pointer 15 is located in the front side of protective shell 5, pointer 15 points to scale groove 14.

[0016] When the opening of the valve core 2 needs to be adjusted, the operator turns the knob 13, the rotation of the knob 13 drives the rotation of the rotating shaft 9, the rotation of the rotating shaft 9 drives the rotation of the gear two 11, since the gear two 11 is engaged with the gear one 8, the gear one 8 will also rotate, the rotation of the gear one 8 drives the rotation of the worm 7, the rotation of the worm 7 drives the rotation of the worm wheel 4 through the engagement.

[0017] The rotation of the worm wheel 4 drives the rotation of the valve rod 3, the rotation of the valve rod 3 drives the rotation of the valve core 2 in the valve body 1, thereby changing the opening of the valve core 2 and adjusting the flow of the fluid.

[0018] In the process of rotating the knob 13, the pointer 15 on the rotating shaft 9 will rotate and point to the scale groove 14 on the front wall of the protective shell 5, by observing the scale pointed by the pointer 15, the operator can accurately control the opening of the valve core 2, thereby realizing the accurate adjustment of the flow.

Claims

1. A ball valve, characterized in that The utility model provides a valve, including valve body (1), valve body (1) have valve core (2) in, valve core (2) with valve body (1) sliding fit, the top of valve core (2) is connected valve stem (3) fixedly, valve stem (3) passes out valve body (1) top, valve stem (3) with valve body (1) rotation connection, the top of valve stem (3) is fixed with worm wheel (4) sleeve, worm wheel (4) outside has protective housing (5), protective housing (5) with valve body (1) top fixed connection, protective housing (5) have worm (7) in, worm (7) is located worm wheel (4) right side, worm (7) with worm wheel (4) is engaged, the front and rear end outer wall of worm (7) all rotation connection fixed plate (6), fixed plate (6) downwardly extending passes through protective housing (5), the bottom of fixed plate (6) with valve body (1) fixed connection, the outer wall of fixed plate (6) with protective housing (5) fixed connection, the front end of worm (7) passes out front fixed plate (6), the front end outer wall of worm (7) is fixed with gear one (8) sleeve, the inside front side of protective housing (5) has gear two (11), gear two (11) is through plane bearing (12) with the front side inner wall of protective housing (5) rotation connection, gear two (11) with gear one (8) is engaged, the front side wall middle part of gear two (11) is fixed with the insertion of rotation axis (9), the front end of rotation axis (9) passes out the front side wall of protective housing (5), the rear end outer wall of rotation axis (9) is through rolling bearing (10) with protective housing (5) rotation connection, the front end of rotation axis (9) is connected with rotation handle (13), the front side wall of protective housing (5) is set up scale groove (14), scale groove (14) encircle rotation axis (9) equiangular distribution, the outer wall of rotation axis (9) is connected with pointer (15), pointer (15) is located the front side of protective housing (5), and pointer (15) points to scale groove (14).

Images