CN205190769U - High accuracy extra small flow control valve - Google Patents

Abstract

The utility model provides a high-precision ultra-small flow regulating valve. The high-precision ultra-small flow regulating valve includes a valve body, a valve seat, a valve cover, a throttle plate, a valve stem, an oil-free bushing, a packing, a sealing ring and bolts, and the valve seat is sealed in the valve body. The throttling plate is arranged at the lower end of the valve seat, the valve rod passes through the valve cover and is connected with the valve seat, the bolt passes through the valve cover and is connected with the valve body, and the oil-free shaft Sleeved on the inside of the valve cover and close to the valve stem, the packing is arranged on the upper end of the inside of the valve cover, and the sealing ring is arranged at the joint between the valve body and the valve seat. The high-precision ultra-small flow regulating valve provided by the utility model solves the technical problems of poor sealing performance and low precision of the existing flow regulating valve.

Description

High-precision ultra-small flow control valve

technical field

The utility model relates to the field of valve casting, in particular to a high-precision ultra-small flow regulating valve.

Background technique

With the development of fine chemicals in food additives, medicine and electronics industries, the requirements for high-precision ultra-small flow control are getting higher and higher, and the demand is also increasing. This ultra-small flow control valve has high requirements on sealing performance due to its high requirements on precision. At present, the ultra-small flow control valves on the market generally have defects such as inaccurate flow adjustment, large curve changes, poor sealing performance and low precision, which can no longer meet the growing demand for automatic control of ultra-small flow.

Utility model content

In order to solve the technical problems of poor sealing performance and low precision of an ultra-small flow regulating valve, the utility model provides a high-precision ultra-small flow regulating valve with good sealing performance and high precision.

The high-precision ultra-small flow regulating valve includes a valve body, a valve seat, a valve cover, a throttle plate, a valve stem, an oil-free bushing, a packing, a sealing ring and bolts, and the valve seat is sealed in the valve body. The throttling plate is arranged at the lower end of the valve seat, the valve rod passes through the valve cover and is connected with the valve seat, the bolt passes through the valve cover and is connected with the valve body, and the oil-free shaft Sleeved on the inside of the valve cover and close to the valve stem, the packing is arranged on the upper end of the inside of the valve cover, and the sealing ring is arranged at the joint between the valve body and the valve seat.

In a preferred embodiment of the high-precision ultra-small flow regulating valve provided by the utility model, the throttle plate includes a throttle plate body and a throttle hole, and the throttle hole runs through the middle of the throttle plate body .

In a preferred embodiment of the high-precision ultra-small flow regulating valve provided by the utility model, the valve stem includes a valve stem body and a valve needle, and the valve needle is arranged at the lower end of the valve stem body and penetrates into the in the valve seat.

In a preferred embodiment of the high-precision ultra-small flow regulating valve provided by the utility model, the bolt includes a bolt body and a nut, and the nut is arranged on the upper end of the bolt body.

In a preferred embodiment of the high-precision ultra-small flow regulating valve provided by the utility model, the packing includes an upper packing, a middle packing and a lower packing, and the upper packing, the middle packing and the lower packing are obtained from Set from top to bottom.

In a preferred embodiment of the high-precision ultra-small flow regulating valve provided by the utility model, the high-precision ultra-small flow regulating valve includes a sealing gasket, and the sealing gasket is arranged between the valve body and the Valve cover connection.

Compared with the existing ultra-small flow regulating valve, the high-precision ultra-small flow regulating valve provided by the utility model has the following beneficial effects:

1. The high-precision ultra-small flow regulating valve is provided with the sealing ring and the sealing gasket, which can ensure the sealing performance of the high-precision ultra-small flow regulating valve and improve its precision.

2. The high-precision ultra-small flow regulating valve is provided with the oil-free bushing, which can ensure the accuracy of the movement of the valve stem and the accuracy of the high-precision ultra-small flow regulating valve.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the utility model more clearly, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the utility model , for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative work, wherein:

Fig. 1 is a structural schematic diagram of a high-precision ultra-small flow regulating valve provided by the utility model.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Example.

Please refer to FIG. 1 , which is a structural schematic diagram of the high-precision ultra-small flow regulating valve provided by the utility model.

The high-precision ultra-small flow regulating valve 1 includes a valve body 11, a valve seat 12, a valve cover 13, a throttle plate 14, a valve stem 15, an oil-free bushing 16, a packing 17, a sealing ring 18, bolts 19 and gaskets slice 10. The valve seat 12 is sealingly arranged in the valve body 11 , the throttle plate 14 is arranged at the lower end of the valve seat 12 , and the valve stem 15 passes through the valve cover 13 and is inserted into the middle of the valve seat 12 . The bolt 19 passes through the valve cover 13 to connect with the valve body 11 , and the oil-free bushing 16 is arranged at the inner lower end of the valve cover 13 and is in close contact with the valve stem 15 . The packing 17 is arranged on the inner upper end of the valve cover 13 and is close to the valve stem 15, the sealing ring 18 is arranged at the joint between the valve body 11 and the valve seat 12, and the sealing gasket 10 is arranged At the joint between the valve body 11 and the valve cover 13 .

The throttle plate 14 includes a throttle plate body 141 and a throttle hole 142 , and the throttle hole 142 runs through the middle of the throttle plate body 141 .

The valve stem 15 includes a valve stem body 151 and a valve needle 152 , the valve needle 152 is disposed at a lower end of the valve stem body 151 and penetrates into the valve seat 12 .

The filler 17 includes an upper filler 171 , a middle filler 172 and a lower filler 173 , and the upper filler 171 , the middle filler 172 and the lower filler 173 are connected sequentially from top to bottom.

The bolt 19 includes a bolt body 191 and a nut 192 , and the nut 192 is disposed on the upper end of the bolt body 191 .

During specific implementation, the valve seat 12 is embedded in the valve body 11 , and the sealing ring 18 is used to seal its connection. Place the valve cover 13 on the upper end of the valve body 11, insert the bolt body 191, tighten and fix it with the nut 192, and the sealing gasket 10 seals the connection between the valve body 11 and the valve cover 13 place. The valve stem 15 passes through the middle of the valve cover 13 , and the valve needle 152 at the lower end of the valve stem body 151 is inserted into the middle of the valve seat 12 and aligned with the throttle hole 142 . The upper filler 171 , the middle filler 172 and the lower filler 173 are arranged in sequence to fasten the upper part of the valve stem 15 . The upper part of the valve stem 15 is connected with the actuator, and moves with the drive of the actuator, so as to drive the movement of the valve needle 152 to adjust the medium flow. The oil-free bushing 16 can ensure the accuracy of the up and down movement of the valve rod 15 .

Compared with the existing ultra-small flow regulating valve, the high-precision ultra-small flow regulating valve 1 provided by the utility model has the following beneficial effects:

1. The high-precision ultra-small flow regulating valve 1 is provided with the sealing ring 18 and the sealing gasket 10, which can ensure the sealing performance of the high-precision ultra-small flow regulating valve 1 and improve its precision.

2. The high-precision ultra-small flow regulating valve 1 is provided with the oil-free bushing 16 to ensure the accuracy of the movement of the valve stem 15 and the accuracy of the high-precision ultra-small flow regulating valve 1 .

The above descriptions are only examples of the present utility model, and are not intended to limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the utility model description, or directly or indirectly used in other related technologies Fields are all included in the scope of patent protection of the utility model in the same way.

Claims (6)

1. A high-precision ultra-small flow regulating valve is characterized in that: it comprises a valve body, a valve seat, a valve cover, a throttle plate, a valve stem, an oil-free bushing, a packing, a sealing ring and a bolt, and the valve seat is sealed Set in the valve body, the throttle plate is set at the lower end of the valve seat, the valve stem runs through the valve cover and connects with the valve seat, the bolt runs through the valve cover and the valve body connection, the oil-free shaft is sleeved on the inside of the valve cover and close to the valve stem, the packing is arranged on the upper end of the inside of the valve cover, and the sealing ring is arranged on the valve body and the valve seat Junction. 2. The high-precision ultra-small flow regulating valve according to claim 1, wherein the throttle plate includes a throttle plate body and a throttle hole, and the throttle hole runs through the middle of the throttle plate body. 3. The high-precision ultra-small flow regulating valve according to claim 1, wherein the valve stem includes a valve stem body and a valve needle, and the valve needle is arranged at the lower end of the valve stem body and penetrates into the valve stem body. in the valve seat. 4. The high-precision ultra-small flow regulating valve according to claim 1, wherein the bolt comprises a bolt body and a nut, and the nut is arranged on the upper end of the bolt body. 5. The high-precision ultra-small flow regulating valve according to claim 1, characterized in that: the packing includes an upper packing, a middle packing and a lower packing, and the upper packing, the middle packing and the lower packing are from the upper Go to the next setting in turn. 6. The high-precision ultra-small flow regulating valve according to claim 1, characterized in that: the high-precision ultra-small flow regulating valve includes a sealing gasket, and the sealing gasket is arranged between the valve body and the valve body. Cover the connection.