Balance valve and use method thereof
阅读说明：本技术 一种平衡阀及其使用方法 (Balance valve and use method thereof ) 是由 王朝阳 胡朝辉 严品望 祝云霞 王帅 徐东荣 于 2020-07-21 设计创作，主要内容包括：本发明属于管道阀门技术领域,涉及一种平衡阀及其使用方法。所述平衡阀包括阀体和阀盖,阀盖内设有阀杆,阀杆包括上阀杆和下阀杆；上阀杆包括杆体,杆体底端设有凸台,杆体下部设有外螺纹部I,凸台上设有外螺纹部II,外螺纹部I与外螺纹部II的螺纹等径；所述下阀杆包括杆体,杆体顶端设有与凸台相配合的凹槽,杆体顶端外部设有外螺纹部III；外螺纹部II与外螺纹部III配合后形成与外螺纹部I相同的螺纹部；上阀杆内设有贯穿上端和下端的空腔I,下阀杆上端开设有空腔II,空腔I内设有调节阀杆且调节阀杆下端伸入空腔II；调节阀杆顶端设有安装孔。采用本发明,当平衡阀的阀门开启度设定好后,其他人员不能随意改变开启度。(The invention belongs to the technical field of pipeline valves, and relates to a balance valve and a using method thereof. The balance valve comprises a valve body and a valve cover, a valve rod is arranged in the valve cover, and the valve rod comprises an upper valve rod and a lower valve rod; the upper valve rod comprises a rod body, a boss is arranged at the bottom end of the rod body, an external thread part I is arranged at the lower part of the rod body, an external thread part II is arranged on the boss, and the diameters of the external thread part I and the external thread part II are equal; the lower valve rod comprises a rod body, a groove matched with the boss is formed in the top end of the rod body, and an external thread part III is arranged outside the top end of the rod body; the external thread part II is matched with the external thread part III to form a thread part identical to the external thread part I; a cavity I penetrating through the upper end and the lower end is arranged in the upper valve rod, a cavity II is formed in the upper end of the lower valve rod, an adjusting valve rod is arranged in the cavity I, and the lower end of the adjusting valve rod extends into the cavity II; the top end of the adjusting valve rod is provided with a mounting hole. By adopting the invention, after the opening degree of the valve of the balance valve is set, other personnel can not change the opening degree at will.)
1. A balance valve comprises a valve body (1) and a valve cover (8), wherein the valve cover (8) is installed outside the valve body (1) in a sealing mode; the valve is characterized in that a valve rod is arranged in the valve cover (8), and the valve rod comprises an upper valve rod (25) and a lower valve rod (6); the upper valve rod (25) comprises a rod body (33), a boss (37) is arranged at the bottom end of the rod body (33), an external thread part I (34) is arranged at the lower part of the rod body (33), an external thread part II (35) is arranged on the boss (37), and the external thread part I (34) and the external thread part II (35) are equal in thread diameter; the lower valve rod (6) comprises a rod body (33), a groove (38) matched with the boss (37) is formed in the top end of the rod body (33), and an external thread part III (36) is formed in the outer portion of the top end of the rod body; the external thread part II (35) is matched with the external thread part III (36) to form a thread part identical to the external thread part I (34); a cavity I (26) penetrating through the upper end and the lower end is arranged in the upper valve rod (25), a cavity II (32) is formed in the upper end of the lower valve rod (6), an adjusting valve rod (9) is arranged in the cavity I (26), and the lower end of the adjusting valve rod (9) extends into the cavity II (32); the top end of the adjusting valve rod (9) is provided with a mounting hole (31).
2. The balance valve of claim 1, wherein the cavity I (26) is provided with an inner shoulder I (27), an inner shoulder II (28) and an inner shoulder III (29) at the inner upper end, and the inner shoulder I (27) and the inner shoulder II (28) are provided with locking nuts (16) matched with the inner shoulder I (27) and the inner shoulder II (28); the upper end of the adjusting valve rod (9) is provided with an outer shoulder (30) which is matched with the inner shoulder III (29) and the locking nut (16).
3. The balancing valve according to claim 1, characterized in that the regulating valve rod (9) is provided with an external thread, and the cavities I (26) and II (32) are provided with an internal thread matching the external thread.
4. A balancing valve according to claim 1, characterized in that the bonnet (8) is provided with an internal thread, the upper valve stem (25) being connected to the bonnet (8) by means of an external thread part I (34) and an external thread part II (35), and the lower valve stem (6) being connected to the bonnet (8) by means of an external thread part III (36).
5. A balancing valve according to claim 1, characterized in that the locking nut (16) is screwed to the cavity I (26) of the upper valve stem (25).
6. A balancing valve according to claim 1, characterized in that the upper end of the upper valve stem (25) extends beyond the valve cover (8) and is connected to a handle (19).
7. A balancing valve according to claim 1, characterized in that the handle (19) is provided with a closure cap (20) which cooperates with the cavity I (26).
8. A balancing valve according to claim 1, characterized in that a scale sleeve (18) is provided between the valve cover (8) and the handle (19), the scale sleeve (18) being fitted over the valve cover (8).
9. A balancing valve according to claim 1, characterized in that a clamping cap (13) is provided between the bonnet (8) and the upper valve stem (25), and the clamping cap (13) is arranged around the upper valve stem (25).
10. A method for using a balance valve, characterized by using the balance valve of any one of the preceding claims, comprising the following steps:
(1) the plug cover is opened, the wrench is inserted into the mounting hole, the wrench is rotated to enable the adjusting valve rod to move downwards until the adjusting valve rod does not rotate, and the upper valve rod and the lower valve rod are in tight contact;
(2) the handle is rotated to drive the upper valve rod and the lower valve rod to move downwards or upwards, so that the opening degree of the valve is adjusted;
(3) after the opening degree is adjusted, the wrench is rotated to adjust the valve rod to move upwards, the upper valve rod moves upwards along with the upper valve rod, a gap is formed between the upper valve rod and the lower valve rod, the threads of the external thread part II and the external thread part III are staggered, the upper valve rod, the lower valve rod and the valve body cannot normally move, and finally the upper plugging cover is installed.
Technical Field
The invention belongs to the technical field of pipeline valves, and particularly relates to a balance valve and a using method thereof.
Background
In some industries, since there is a large pressure or flow difference between the media (various flowable materials) in various parts of the pipes or vessels, in order to reduce or balance the difference, a valve is installed between the corresponding pipes or vessels to adjust the relative balance of the pressures on both sides or to achieve the balance of the flow by means of flow division, and the valve is called a balance valve. The balance valve is a valve which plays a role in dynamic and static balance adjustment under the hydraulic working condition. Balanced valves can be divided into three types: static balance valves, dynamic balance valves, and differential pressure independent balance valves. At present, among the balanced valve commonly used among the prior art, the valve rod is a whole, is equipped with the screw thread on the valve rod, under the handle effect, the valve rod can be valve body up-and-down motion relatively, the distance of control valve clack and disk seat to control flap's degree of opening, but adopt this kind of structure, after the staff has set for the valve degree of opening, if the handle is touched to other personnel's mistake, the handle can drive the valve rod motion, because the valve rod is a whole, the degree of opening of valve changes very easily, and then can't realize the balanced action.
Disclosure of Invention
In order to solve the problems, the invention provides the balance valve, and by adopting the balance valve, after the opening degree of the valve of the balance valve is set, other personnel cannot change the opening degree at will.
The invention mainly adopts the following technical scheme: a balance valve comprises a valve body and a valve cover, wherein the valve cover is installed outside the valve body in a sealing mode; a valve rod is arranged in the valve cover and comprises an upper valve rod and a lower valve rod; the upper valve rod comprises a rod body, a boss is arranged at the bottom end of the rod body, an external thread part I is arranged at the lower part of the rod body, an external thread part II is arranged on the boss, and the diameters of the external thread part I and the external thread part II are equal; the lower valve rod comprises a rod body, a groove matched with the boss is formed in the top end of the rod body, and an external thread part III is arranged outside the top end of the rod body; the external thread part II is matched with the external thread part III to form a thread part identical to the external thread part I; a cavity I penetrating through the upper end and the lower end is arranged in the upper valve rod, a cavity II is formed in the upper end of the lower valve rod, an adjusting valve rod is arranged in the cavity I, and the lower end of the adjusting valve rod extends into the cavity II; the top end of the adjusting valve rod is provided with a mounting hole.
An inner shoulder I, an inner shoulder II and an inner shoulder III are arranged at the inner upper end of the cavity I, and locking nuts matched with the inner shoulder I and the inner shoulder II are arranged at the inner shoulder I and the inner shoulder II; the upper end of the adjusting valve rod is provided with an outer shoulder matched with the inner shoulder III and the locking nut. By adopting the structure, the adjusting valve rod is fixed in the cavity I of the upper valve rod and can be regarded as a whole.
Be equipped with the external screw thread on the adjusting valve rod, all be equipped with in cavity I and the cavity II with external screw thread matched with internal thread.
Be equipped with the internal thread on the valve gap, go up the valve rod and pass through external screw thread portion I and external screw thread portion II and valve gap connection, lower valve rod passes through external screw thread portion III and valve gap connection.
And the locking nut is in threaded connection with the cavity I of the upper valve rod.
The upper end of the upper valve rod extends out of the valve cover and is connected with a handle.
And the handle is provided with a plug cover matched with the cavity I.
And a scale sleeve is arranged between the valve cover and the handle and sleeved on the valve cover.
A pressing cap is arranged between the valve cover and the upper valve rod, and the pressing cap is sleeved on the upper valve rod.
The invention also provides a using method of the balance valve, which comprises the following steps:
(1) the plug cover is opened, the wrench is inserted into the mounting hole, the wrench is rotated to enable the adjusting valve rod to move downwards until the adjusting valve rod does not rotate, the upper valve rod and the lower valve rod are in tight contact, the adjusting valve rod is tightly combined with the lower valve rod at the moment, the external thread part II is matched with the external thread part III to form a thread part identical to the external thread part I, and the upper valve rod and the lower valve rod can be regarded as a unified whole and are identical to the valve rods in the prior art.
(2) The handle is rotated to drive the upper valve rod and the lower valve rod to move downwards or upwards, so that the opening degree of the valve is adjusted;
(3) after the adjustment of the opening degree is finished, the wrench is rotated, the adjusting valve rod moves upwards, and because the external threads of the external thread part I, the external thread part II and the external thread part III and the internal threads of the valve cover are still in clearance, the upper valve rod can move upwards along with the adjusting valve rod, and a clearance is generated between the upper valve rod and the lower valve rod, so that the threads of the external thread part II and the external thread part III are staggered, the upper valve rod, the lower valve rod and the valve body can not normally move, and finally the upper plugging cover is installed. At this time, the threads of the male thread portion II and the male thread portion III are misaligned, and therefore, even if the handle is turned, the adjustment of the adjustment valve rod, that is, the adjustment of the opening degree cannot be performed. When the opening degree needs to be adjusted again, the step (1) can be repeated.
In conclusion, the original valve rod is divided into two sections by a linear cutting mode, one end of the valve rod is provided with a convex external thread part II, the other end of the valve rod is provided with a concave external thread part III, the two sections are connected by an adjusting valve rod, the adjusting valve rod is screwed, the gap between the matching end surfaces of the upper valve rod and the lower valve rod can be changed, and when the matching end surfaces of the upper valve rod and the lower valve rod are in close contact, the opening degree of the valve can be normally adjusted; when a gap is reserved between the matching end surfaces of the upper valve rod and the lower valve rod, the threads of the external thread part II and the external thread part III are staggered, the opening degree of the valve cannot be adjusted normally, and the purpose of preventing other people from operating is achieved.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is an enlarged view of a portion A of FIG. 1;
FIG. 4 is a schematic view of the upper and lower valve stems of the present invention;
FIG. 5 is a schematic view of a regulator stem according to the present invention;
FIG. 6 is a schematic front view of the upper valve stem of the present invention;
FIG. 7 is a schematic bottom view of the structure of FIG. 6 (omitting the threaded portion);
FIG. 8 is a schematic front view of the lower stem of the present invention;
FIG. 9 is a schematic bottom view of the structure of FIG. 8 (omitting the threaded portion);
FIG. 10 is a schematic view of the mating configuration of the upper and lower valve stems;
in the figure: the valve body 1 is a valve body, the valve flap cover 2 is a valve flap cover, the valve flap pad 3 is a valve flap pad, the gasket 4 is a gasket, the valve flap 5 is a valve flap, the lower stem 6 is a lower stem, the O-ring 7 is an O-ring, the valve flap 8 is a valve cover, the
Detailed Description
A balance valve comprises a valve body 1 and a valve cover 8, wherein the valve cover 8 is installed outside the valve body 1 in a sealing mode; a valve rod is arranged in the valve cover 8, and the valve rod comprises an
An inner shoulder I27, an inner shoulder II28 and an inner shoulder III29 are arranged at the inner upper end of the cavity I26, and locking nuts 16 matched with the inner shoulder I27 and the inner shoulder II28 are arranged at the inner shoulder I27 and the inner shoulder II 28; the upper end of the adjusting
A use method of a balance valve comprises the following steps:
(1) the plug cover is opened, the wrench is inserted into the mounting hole, the wrench is rotated to enable the adjusting valve rod to move downwards until the adjusting valve rod does not rotate, and the upper valve rod and the lower valve rod are in tight contact;
(2) the handle is rotated to drive the upper valve rod and the lower valve rod to move downwards or upwards, so that the opening degree of the valve is adjusted;
(3) after the opening degree is adjusted, the wrench is rotated to adjust the valve rod to move upwards, the upper valve rod moves upwards along with the upper valve rod, a gap is formed between the upper valve rod and the lower valve rod, the threads of the external thread part II and the external thread part III are staggered, the upper valve rod, the lower valve rod and the valve body cannot normally move, and finally the upper plugging cover is installed.
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