Pressure balance ball valve

Abstract

The utility model discloses a pressure balance ball valve which comprises a valve body, a valve seat, a ball valve core, a valve rod sleeve, a handle and the like, and is mainly characterized in that a valve rod which is movably mounted in a lifting manner is arranged in the valve rod sleeve, a spherical-crown-shaped adjusting head is formed at the lower end of the valve rod, and the maximum outer diameter of the adjusting head is smaller than the diameter of the section of a medium channel; the adjusting head penetrates through a valve element hole in the top of the ball valve element and extends into the medium channel. Thus, the handle drives the ball valve element to rotate through the valve rod sleeve, and the medium channel can be driven to seal and open and close the valve. Meanwhile, when the medium channel of the ball valve element is in a valve opening state, the section depth of the portion, stretching into the medium channel, of the adjusting head can be changed through lifting movement of the valve rod, and therefore the effect of adjusting the pressure and flow of media passing through the medium channel is achieved; obviously, the improved pressure balance ball valve is a multifunctional composite valve and has two functions, so that great convenience is brought to installation and use of a pipeline system.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of medium interception ball valve structure, specifically refers to the pressure balance ball valve that can balance the pressure inside valve. BACKGROUND

[0002] Ball valve is a common valve structure, it mainly plays the role of cutting off, distribution and changing medium flow direction on the pipeline of conveying medium, the structure of ball valve is relatively simple, usually is by valve body, the valve seat arranged in valve body, the ball valve core arranged in valve seat and rotatably sealed installation in the top of valve body valve stem etc. Formed, the ball valve core is equipped with medium passage, the lower end of the valve stem is connected with ball valve core, the upper end of valve stem extends out the top of valve body and connects handle, so as to drive valve stem rotation by operating handle, can drive ball valve core to rotate in valve seat, to realize the sealing opening and closing of valve;Meanwhile, pressure balance valve is extremely important in existing pipeline system, it can provide stable medium pressure, and the stable pressure of medium has great influence on pipeline and load equipment, since the structure design and use function of ball valve and balance valve are different, so one pipeline system needs to be configured two kinds of valves in actual use, which makes the number of pipeline system valves bloated, and increases the complexity of pipeline installation, which also brings great inconvenience to the installation and use of users. SUMMARY

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a pressure balance ball valve capable of simultaneously integrating ball valve and balance valve.

[0004] The technical problem of the utility model is realized by the following technical scheme:

[0005] A kind of pressure balance ball valve, including valve body, the valve seat arranged in valve body, the ball valve core arranged in valve seat and rotatably sealed installation in the top of valve body valve stem sleeve;The ball valve core is equipped with medium passage;The lower end of the valve stem sleeve is connected with ball valve core, and the upper end of valve stem sleeve extends out the top of valve body and connects handle, the valve stem sleeve is equipped with the valve stem of lifting activity installation, the lower end of the valve stem is formed with the adjusting head of spherical crown, the maximum outer diameter thereof is less than the cross-sectional diameter of medium passage, and the adjusting head passes through the valve core hole in the top of ball valve core and extends into medium passage;The handle drives ball valve core to rotate by valve stem sleeve, and drives medium passage sealing opening and closing valve, when medium passage is in the open valve state, the adjusting head changes the cross-sectional depth of adjusting head extending into medium passage by the lifting activity of valve stem, to adjust the pressure and flow of medium in medium passage.

[0006] The valve stem sleeve is equipped with the valve sleeve hole of axial through, the valve stem is installed by the cooperation of outer thread and inner thread of valve sleeve hole, and the valve stem is converted into lifting activity in valve sleeve hole by thread rotation.

[0007] The valve stem and the valve sleeve hole are provided with double O-rings for sealing the lifting movement of the valve stem.

[0008] The handle is internally provided with a top hole for exposing the upper end of the valve stem.

[0009] The upper end of the valve stem is provided with an indicating ring, and the hole wall of the top hole is provided with an observation window; the indicating ring forms visible movement in the observation window with the lifting movement of the valve stem.

[0010] The top hole, the valve sleeve hole and the valve core hole are on the same axial line, and the same coaxial arrangement makes the valve stem keep centration with the medium passage during the lifting movement.

[0011] The axial line of the medium passage and the rotation axial line of the valve stem sleeve are perpendicularly intersected.

[0012] The valve body is provided with a mounting hole, and a thermometer is mounted in the mounting hole or a sealing plug is provided.

[0013] The lower end of the valve stem sleeve and the upper end of the spherical valve core are respectively provided with a transmission piece and a transmission groove which are matched in shape and assembled and form a transmission connection; the upper end of the valve stem sleeve is provided with a flat shaft which is matched in the top hole of the handle and forms a transmission connection with the handle.

[0014] The inner surface of the handle is provided with a connecting barb which is enclosed in the periphery of the top hole, and a ring groove is correspondingly provided on the top outer circumferential surface of the valve stem sleeve; the flat shaft is matched in the top hole, and the connecting barb is matched in the ring groove to form an anti-disengagement locking structure.

[0015] Compared with the prior art, the valve stem sleeve which is connected with the spherical valve core and the handle is additionally provided with a valve stem which is installed in the lifting movement, and a spherical crown-shaped adjusting head is formed at the lower end of the valve stem, the maximum outer diameter of which is smaller than the cross-sectional diameter of the medium passage, and the adjusting head extends into the medium passage through the valve core hole in the top of the spherical valve core; in this way, the handle drives the spherical valve core to rotate through the valve stem sleeve, and can drive the medium passage sealing on-off valve, that is, the medium cutting on-off function of the ball valve is realized; at the same time, when the medium passage of the spherical valve core is in the open valve state, the adjusting head can be lifted and moved through the valve stem, so as to change the cross-sectional depth of the adjusting head extending into the medium passage, so as to achieve the pressure and flow of the medium in the medium passage, that is, the medium pressure stabilizing function of the balance valve is realized; obviously, the improved pressure balance ball valve is a multifunctional composite valve, which has the function of one valve and two uses, so that the installation and use of the pipeline system are greatly facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a sectional view of the utility model.

[0017] Figure 2 is a structural schematic view of the valve stem sleeve.

[0018] Figure 3 is a perspective view of Figure 2 .

[0019] Figure 4 is a sectional view of the ball valve core.

[0020] Figure 5 is an outline view of the ball valve core.

[0021] Figure 6 is a perspective view of Figure 5 .

[0022] Figure 7 is a sectional view of the handle.

[0023] Figure 8 is a perspective view of Figure 7 . DETAILED DESCRIPTION

[0024] The utility model embodiment will be explained in detail below according to the above-mentioned drawings.

[0025] As shown in Figures 1-8 , 1. valve body, 11. mounting hole, 12. screw plug, 2. valve seat, 3. ball valve core, 31. medium passage, 32. valve core hole, 33. transmission groove, 4. valve stem sleeve, 41. transmission piece, 42. ring groove, 43. valve sleeve hole, 44. flat shaft, 5. valve stem, 51. adjusting head, 52. indicating ring, 53. driving hole, 6. handle, 61. top hole, 62. observation window, 63. connecting barb, 7. retaining ring, 8. double O-ring, 9. gasket, 10. compression nut.

[0026] A pressure balance ball valve, as shown in Figure 1 , it is a multifunctional composite valve with the functions of ball valve and balance valve, and the structure comprises a valve body 1, a valve seat 2 arranged in the valve body, a ball valve core 3 arranged in the valve seat and a valve stem sleeve 4 rotatably and sealingly arranged on the top of the valve body.

[0027] The valve body 1 is provided with a mounting hole 11, which is directly communicated with the water passage in the valve body, and a thermometer (not shown in the figure) can be arranged in the mounting hole 11 to realize the temperature measurement function in the valve, and if the thermometer is not arranged, the screw plug 12 is used to seal and close through the gasket.

[0028] The ball valve core 3 is provided with a medium passage 31, which is a through hole penetrating the ball valve core in the horizontal direction, as shown in Figure 3 , and the axis of the medium passage 31 is perpendicular to the rotation axis of the valve stem sleeve 4.

[0029] The valve stem sleeve 4 is rotatable sealingly installed by means of an O-ring and a pair of gaskets 9, and is top-pressed by a compression nut 10; the lower end of the valve stem sleeve 4 is connected to the ball valve core 3, and the upper end of the valve stem sleeve extends out of the top of the valve body to be connected to the handle 6; the specific structure is that the lower end of the valve stem sleeve 4 and the upper end of the ball valve core 3 are respectively provided with a transmission piece 41 and a transmission groove 33 which are in shape-fitting assembly and constitute a transmission connection, so that the rotation of the valve stem sleeve 4 can drive the ball valve core 3 to rotate synchronously; the upper end of the valve stem sleeve 4 is provided with a flat shaft 44 which is fitted into the top hole 61 of the handle 6, that is, the top hole is a flat hole for fitting the flat shaft, so that the upper end of the valve stem sleeve and the handle 6 constitute a transmission connection, and thus the rotation of the handle 6 can drive the valve stem sleeve 4 to rotate synchronously.

[0030] At the same time, the inner surface of the handle 6 is provided with a connecting barb 63 which is enclosed around the periphery of the top hole 61, and a ring groove 42 is correspondingly provided on the top outer circumferential surface of the valve stem sleeve 4; when the flat shaft 44 is fitted into the top hole 61 and the connecting barb 63 is fitted into the ring groove 42, a anti-disengagement locking structure between the handle 6 and the upper end of the valve stem sleeve 4 is formed.

[0031] The valve stem sleeve 4 is provided with a valve sleeve hole 43 which is axially through, and the valve stem 5 is movably installed in the valve sleeve hole; as shown in the embodiment Figure 1 , the valve stem 5 is fitted and installed in the valve sleeve hole 43 by means of external threads and internal threads, so that the rotation of the valve stem 5 can be converted into the up-and-down movement in the valve sleeve hole 43; therefore, a driving hole 53 is designed at the top end of the valve stem to facilitate the tool to be fitted into the driving hole to drive the rotation of the valve stem 5.

[0032] In addition, a double O-ring 8 is arranged between the valve stem 5 and the valve sleeve hole 43 to realize the sealing of the up-and-down movement of the valve stem, and a check ring 7 is arranged to limit the maximum up-and-down distance of the valve stem 5.

[0033] The lower end of the valve stem 5 is formed with a spherical crown-shaped adjusting head 51, the maximum outer diameter of which is smaller than the cross-sectional diameter of the medium passage 31, and the adjusting head 51 extends into the medium passage 31 through the valve core hole 32 at the top of the ball valve core 3, and the valve core hole 32 and the medium passage 31 are arranged in a ┬ type; the upper end of the valve stem 5 is provided with an indicating ring 52; the indicating ring is usually a red ring with a prominent color, and the upper end of the valve stem 5 together with the indicating ring 52 is exposed in the top hole 61 of the handle 6; a viewing window 62 is correspondingly provided on the hole wall of the top hole; as shown in the embodiment Figure 8 , a plurality of circumferentially distributed hollow grooves are provided on the hole wall of the top hole 61 to facilitate the observation of the indicating ring 52 in the top hole; in actual use, the indicating ring can be visually moved in the viewing window 62 with the up-and-down movement of the valve stem 5, so that the up-and-down height and position of the valve stem 5 can be intuitively observed.

[0034] Therefore, the top hole 61, the valve sleeve hole 43 and the valve core hole 32 are also on the same axis, the axis of the valve rod 5 is also on the same axis, and the same axis is perpendicular to the axis of the medium passage 31, so that the structure arranged on the same axis can keep the valve rod 5 in alignment with the medium passage 31 during the lifting movement.

[0035] The working process of the utility model is as follows: the operation handle 6 drives the rotation of the spherical valve core 3 in the valve seat 2 through the valve rod sleeve 4, so as to drive the medium passage 31 on the spherical valve core to seal and open the valve, that is, to realize the medium cutting opening and closing function of the ball valve; then, when the medium passage 31 of the spherical valve core 3 is in the open valve state, the adjusting head 51 can also be lifted through the lifting movement of the valve rod 5, so as to change the sectional depth of the adjusting head extending into the medium passage 31, so as to achieve the pressure and flow of the medium in the medium passage 31, that is, to realize the medium pressure stabilizing effect of the balance valve.

[0036] Obviously, the improved pressure balance ball valve is a multifunctional composite valve, which has the function of one valve and two uses, so that the installation and use of the pipeline system are greatly facilitated.

[0037] The above describes the basic principle and main features of the utility model, and those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A pressure balanced ball valve, comprising a valve body (1), a valve seat (2) arranged in the valve body, a ball valve core (3) arranged in the valve seat, and a valve stem sleeve (4) rotatably and sealingly arranged on the top of the valve body; the ball valve core (3) is provided with a medium passage (31); the lower end of the valve stem sleeve (4) is connected with the ball valve core (3), and the upper end of the valve stem sleeve (4) extends out of the top of the valve body and is connected with a handle (6); characterized in that: the valve stem sleeve (4) is provided with a valve stem (5) arranged movably in the valve stem sleeve (4); the lower end of the valve stem (5) is formed with a spherical crown-shaped adjusting head (51), the maximum outer diameter of the adjusting head (51) is smaller than the cross-sectional diameter of the medium passage (31), and the adjusting head (51) extends into the medium passage (31) through a valve core hole (32) in the top of the ball valve core (3); the handle (6) drives the ball valve core (3) to rotate through the valve stem sleeve (4), and drives the medium passage (31) to seal and open the valve; when the medium passage (31) is in the open valve state, the adjusting head (51) changes the cross-sectional depth of the adjusting head extending into the medium passage (31) by the lifting movement of the valve stem (5), so as to adjust the pressure and flow of the medium passing through the medium passage (31). the valve stem sleeve (4) is provided with an axially-through valve sleeve hole (43); the valve stem (5) is arranged in the valve sleeve hole (43) by cooperating the external thread of the valve stem (5) with the internal thread of the valve sleeve hole (43); and the valve stem (5) is converted into the lifting movement in the valve sleeve hole (43) by the thread rotation.

2. A pressure balanced globe valve according to claim 1, wherein a double O-ring (8) is arranged between the valve stem (5) and the valve sleeve hole (43) to seal the lifting movement of the valve stem (5).

3. A pressure balanced globe valve according to claim 2 wherein the handle (6) is provided with a top hole (61) for exposing the upper end of the valve stem (5).

4. A pressure balanced globe valve in accordance with claim 2 wherein the upper end of the valve stem (5) is provided with an indicating ring (52), and the hole wall of the top hole (61) is provided with an observation window (62); the indicating ring (52) forms a visible movement in the observation window (62) with the lifting movement of the valve stem (5).

5. A pressure balanced globe valve according to claim 4 wherein the top hole (61), the valve sleeve hole (43) and the valve core hole (32) are arranged on the same axis, and the same arrangement makes the valve stem (5) keep the centering with the medium passage (31) when the valve stem (5) lifts.

6. A pressure balanced globe valve in accordance with claim 4 wherein the axis of the medium passage (31) is perpendicular to the rotation axis of the valve stem sleeve (4).

7. A pressure balanced globe valve in accordance with claim 1 wherein the valve body (1) is provided with a mounting hole (11) for mounting a thermometer or a sealingly closed screw plug (12).

8. A pressure balanced globe valve in accordance with claim 1 wherein the lower end of the valve stem sleeve (4) and the upper end of the ball valve core (3) are respectively provided with a transmission piece (41) and a transmission groove (33) which are matched and assembled and constitute a transmission connection; the upper end of the valve stem sleeve (4) is provided with a flat shaft (44) which is arranged in the top hole (61) of the handle (6) and constitutes a transmission connection with the handle (6).

9. A pressure balanced globe valve in accordance with claim 1 wherein the inner surface of the handle (6) is provided with a connecting barb (63) which is enclosed around the periphery of the top hole (61); a ring groove (42) is correspondingly arranged on the top outer circumferential surface of the valve stem sleeve (4); the flat shaft (44) is arranged in the top hole (61) and makes the connecting barb (63) arranged in the ring groove (42) to form an anti-disengagement locking structure.

10. A pressure balanced globe valve according to claim 9, wherein ​

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