CN215763305U

CN215763305U - Needle valve capable of adjusting flow

Info

Publication number: CN215763305U
Application number: CN202121856974.1U
Authority: CN
Inventors: 王仕通
Original assignee: Ningbo Keshengli Stainless Steel Pipe And Valve Co ltd
Current assignee: Ningbo Keshengli Stainless Steel Pipe And Valve Co ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2022-02-08
Anticipated expiration: 2031-08-10

Abstract

The utility model relates to a needle valve capable of adjusting flow, which comprises a valve body, a valve needle vertically arranged in the valve body and capable of moving up and down, and a handle fixed at the upper end of the valve needle; the top of the valve body is provided with a sinking cavity, the center of the bottom of the sinking cavity is provided with a feeding cavity, the inner wall of the sinking cavity is outwards provided with a first sealing sleeve and a second sealing sleeve which are annularly arranged, and the first sealing sleeve and the second sealing sleeve divide the sinking cavity into a first valve cavity, a second valve cavity and a third valve cavity which are sequentially distributed from top to bottom; the utility model has the flow regulation function, can be further suitable for a pipeline system with higher requirement on control precision to enlarge the application range, and has the functions of pressure reduction and speed reduction by virtue of the plurality of through holes to effectively prevent the pipeline system from being damaged due to overlarge pressure, thereby greatly prolonging the service life.

Description

Needle valve capable of adjusting flow

Technical Field

The utility model relates to a needle valve capable of adjusting flow.

Background

The needle valve is an important component in an instrument measuring pipeline system and has the function of opening or cutting off a pipeline passage; the existing needle valve is lack of a flow regulation function, cannot be suitable for a pipeline system with high requirements on control precision, is small in application range, is easy to damage due to overlarge pressure in the pipeline system, is short in service life, and is to be further improved.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned current state of the art, the present invention provides a needle valve with flow rate adjustment function to expand the application range and greatly prolong the service life.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a needle valve capable of adjusting flow comprises a valve body, a valve needle vertically arranged in the valve body and capable of moving up and down, and a handle fixed at the upper end of the valve needle, and is characterized in that a sinking cavity is formed in the top of the valve body, a feeding cavity is formed in the center of the bottom of the sinking cavity, a first sealing sleeve and a second sealing sleeve which are annularly arranged are outwards formed on the inner wall of the sinking cavity, the first sealing sleeve is arranged above the second sealing sleeve, the first sealing sleeve and the second sealing sleeve divide the sinking cavity into a first valve cavity, a second valve cavity and a third valve cavity which are sequentially distributed from top to bottom, a plurality of through hole combinations which are sequentially and concentrically distributed from outside to inside are arranged in the second sealing sleeve, each through hole combination comprises a plurality of through holes which are uniformly arranged at equal angles along the circumferential direction, the second valve cavity is mutually communicated with the third valve cavity through a plurality of through holes, and a valve sleeve is upwards formed at the opening of the sinking cavity, the valve needle is vertically inserted and screwed in the valve sleeve, the lower end of the valve needle sequentially downwards penetrates through the first valve cavity, the second valve cavity and the third valve cavity and is movably inserted into the opening of the feeding cavity, the outer peripheral surface of the valve needle is mutually sealed and attached with the inner walls of the first sealing sleeve and the second sealing sleeve, the outer peripheral surface of the valve needle is further provided with two slotted holes which are diagonally arranged, the two slotted holes are mutually crossed and communicated, and the two slotted holes are mutually matched with the first sealing sleeve and the second valve cavity; a first counter bore is formed in the left side of the valve body, a discharging channel is formed between the bottom of the first counter bore and the inner wall of the left side of the first valve cavity, a second counter bore is formed in the right side of the valve body, and a feeding channel is formed between the bottom of the second counter bore and the inner wall of the right side of the third valve cavity.

Preferably, a plurality of stop blocks circumferentially arranged along the circumferential direction are formed outwards on the outer circumferential surface of the valve needle, and the plurality of stop blocks are arranged in the second valve cavity.

Preferably, an external thread sleeve is further formed outwards at the opening of the second counter bore, the interior of the external thread sleeve is communicated with the opening of the second counter bore, and an internal thread is further formed inside the opening of the first counter bore.

Preferably, a stuffing box is further embedded in the opening at the end part of the valve sleeve, and the stuffing box is sealed and arranged outside the valve needle; the valve needle is characterized in that a packing gland is further sleeved outside the valve needle and arranged at the end part of the valve sleeve, and the lower end of the packing gland is inserted into the opening at the end part of the valve sleeve and tightly pressed at the top of the packing box.

Preferably, the valve cover is sleeved on the outer side of the end part of the valve sleeve and is in threaded connection with the valve needle, and the valve cover is sleeved on the valve needle and is tightly pressed on the top of the packing gland.

Compared with the prior art, the utility model has the advantages that: the utility model has the flow regulation function, can be further suitable for a pipeline system with higher requirement on control precision to enlarge the application range, and has the functions of pressure reduction and speed reduction by virtue of the plurality of through holes to effectively prevent the pipeline system from being damaged due to overlarge pressure, thereby greatly prolonging the service life.

Drawings

FIG. 1 is a front sectional view of the present invention.

Detailed Description

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the utility model have been omitted.

As shown in fig. 1, a needle valve capable of adjusting flow rate comprises a valve body 1, a valve needle 2 vertically arranged in the valve body 1 and capable of moving up and down, and a handle 3 fixed at the upper end of the valve needle 2; the top of the valve body 1 is provided with a sinking chamber 13, the bottom center of the sinking chamber 13 is provided with a feeding chamber 16, the inner wall of the sinking chamber 13 is outwardly provided with a first sealing sleeve 115 and a second sealing sleeve 113 which are annularly arranged, the first sealing sleeve 115 is arranged above the second sealing sleeve 113, the first sealing sleeve 115 and the second sealing sleeve 113 divide the sinking chamber 13 into a first valve chamber 12, a second valve chamber 14 and a third valve chamber 15 which are sequentially distributed from top to bottom, the second sealing sleeve 113 is provided with a plurality of through hole combinations which are sequentially and concentrically distributed from outside to inside, each through hole combination comprises a plurality of through holes 17 which are uniformly arranged along the circumferential direction at equal angles, the second valve chamber 14 is mutually communicated with the third valve chamber 15 through a plurality of through holes 17, the opening of the sinking chamber 13 is upwardly provided with a valve sleeve 11, the valve needle 2 is vertically inserted in the valve sleeve 11 in a threaded manner, the lower end of the valve needle 2 sequentially passes through the first valve chamber 12, the second valve chamber 14 and the third valve chamber 15 and is movably inserted in the opening of the feeding chamber 16, the outer circumferential surface of the valve needle 2 is mutually sealed and attached with the inner walls of the first sealing sleeve 115 and the second sealing sleeve 113, the outer circumferential surface of the valve needle 2 is also provided with two slotted holes 21 which are arranged diagonally, the two slotted holes 21 are mutually crossed and communicated, and the two slotted holes 21 are mutually matched with the first sealing sleeve 115 and the second valve cavity 14; a first counter bore 112 is formed in the left side of the valve body 1, a discharging channel 111 is formed between the bottom of the first counter bore 112 and the left inner wall of the first valve cavity 12, a second counter bore 110 is formed in the right side of the valve body 1, and a feeding channel 18 is formed between the bottom of the second counter bore 110 and the right inner wall of the third valve cavity 15.

A plurality of stoppers 22 circumferentially arranged along the circumferential direction are further formed outwards on the outer circumferential surface of the valve needle 2, and the plurality of stoppers 22 are all arranged in the second valve cavity 14.

An external thread sleeve 19 is further formed outwards at the opening of the second counter bore 110, the interior of the external thread sleeve 19 is communicated with the opening of the second counter bore 110, and an internal thread 114 is further formed inside the opening of the first counter bore 112.

A stuffing box 5 is also embedded in the opening at the end part of the valve sleeve 11, and the stuffing box 5 is sleeved outside the valve needle 2 in a sealing manner; the outside of needle 2 still overlaps and is equipped with gland 4, and gland 4 locates the tip of valve barrel 11, and gland 4's lower extreme inserts inside the tip opening part of valve barrel 11 and compresses tightly at the top of gland 5.

The outer side of the end part of the valve sleeve 11 is also sleeved with a valve cover 6 in threaded connection, and the valve cover 6 is sleeved outside the valve needle 2 and tightly pressed on the top of the packing gland 4.

The working principle is as follows: the feeding pipe is sleeved outside the external thread sleeve 19 through the internal thread joint, and the discharging pipe is inserted in the internal thread 114 through the external thread joint; the material enters the feeding cavity 16 through the external thread sleeve 19, the second counter bore 110 and the feeding channel 18, the handle 3 is held by hand and rotated to drive the valve needle 2 to rotate in the valve sleeve 11, and then the valve needle 2 is driven to move upwards according to the principle of threaded connection, so that a gap is formed between the lower end of the valve needle 2 and the opening of the feeding cavity 16, the material enters the third valve cavity 15 through the gap, and then the material in the third valve cavity 15 enters the second valve cavity 14 through the plurality of through holes 17 to realize the effects of pressure reduction and speed reduction; when the handle 3 is rotated continuously to move the valve needle 2 upwards, when the upper ends of the two slots 21 are higher than the upper edge of the first sealing sleeve 115, the material in the second valve chamber 14 enters the first valve chamber 12 through the two slots 21 and is finally discharged outwards through the material outlet channel 111 and the first counter bore 112, but the flow rate is smaller at this time because the flow area between the two slots 21 and the first valve chamber 12 is smaller.

If the handle 3 is rotated continuously to move the valve needle 2 upwards continuously, the flow areas of the two slots 21 and the first valve cavity 12 are gradually increased, and the flow areas of the two slots 21 and the second valve cavity 14 are gradually decreased, when the top of each stop 22 is attached to the bottom of the first sealing sleeve 115, the valve needle 2 cannot move upwards continuously, and at this time, the first sealing sleeve 115 is located at the middle position of the two slots 21, and the flow rate reaches the maximum.

The utility model has the flow regulation function, can be further suitable for a pipeline system with higher requirement on control precision to enlarge the application range, and has the functions of pressure reduction and speed reduction by virtue of the plurality of through holes 17 to effectively prevent the pipeline system from being damaged due to overlarge pressure, thereby greatly prolonging the service life.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A needle valve capable of adjusting flow comprises a valve body, a valve needle vertically arranged in the valve body and capable of moving up and down, and a handle fixed at the upper end of the valve needle, and is characterized in that a sinking cavity is formed in the top of the valve body, a feeding cavity is formed in the center of the bottom of the sinking cavity, a first sealing sleeve and a second sealing sleeve which are annularly arranged are outwards formed on the inner wall of the sinking cavity, the first sealing sleeve is arranged above the second sealing sleeve, the first sealing sleeve and the second sealing sleeve divide the sinking cavity into a first valve cavity, a second valve cavity and a third valve cavity which are sequentially distributed from top to bottom, a plurality of through hole combinations which are sequentially and concentrically distributed from outside to inside are arranged in the second sealing sleeve, each through hole combination comprises a plurality of through holes which are uniformly arranged at equal angles along the circumferential direction, the second valve cavity is mutually communicated with the third valve cavity through a plurality of through holes, and a valve sleeve is upwards formed at the opening of the sinking cavity, the valve needle is vertically inserted and screwed in the valve sleeve, the lower end of the valve needle sequentially downwards penetrates through the first valve cavity, the second valve cavity and the third valve cavity and is movably inserted into the opening of the feeding cavity, the outer peripheral surface of the valve needle is mutually sealed and attached with the inner walls of the first sealing sleeve and the second sealing sleeve, the outer peripheral surface of the valve needle is further provided with two slotted holes which are diagonally arranged, the two slotted holes are mutually crossed and communicated, and the two slotted holes are mutually matched with the first sealing sleeve and the second valve cavity; a first counter bore is formed in the left side of the valve body, a discharging channel is formed between the bottom of the first counter bore and the inner wall of the left side of the first valve cavity, a second counter bore is formed in the right side of the valve body, and a feeding channel is formed between the bottom of the second counter bore and the inner wall of the right side of the third valve cavity.

2. The needle valve of claim 1, wherein a plurality of circumferentially disposed stops are formed on an outer circumferential surface of the valve needle, and each of the plurality of stops is disposed in the second valve chamber.

3. The needle valve with the adjustable flow rate of claim 1, wherein an external thread sleeve is further formed outwards at the opening of the second counter bore, the inside of the external thread sleeve is communicated with the opening of the second counter bore, and an internal thread is further formed inside the opening of the first counter bore.

4. The needle valve with the adjustable flow rate of claim 1, wherein a stuffing box is embedded in the opening at the end part of the valve sleeve, and the stuffing box is sealed and arranged outside the valve needle; the valve needle is characterized in that a packing gland is further sleeved outside the valve needle and arranged at the end part of the valve sleeve, and the lower end of the packing gland is inserted into the opening at the end part of the valve sleeve and tightly pressed at the top of the packing box.

5. The needle valve of claim 4, wherein a valve cover is screwed on the outer side of the end of the valve sleeve, and the valve cover is sleeved on the valve needle and pressed on the top of the packing gland.