CN210113431U

CN210113431U - Needle valve body

Info

Publication number: CN210113431U
Application number: CN201920881176.0U
Authority: CN
Inventors: 刘斯平; 曾德显; 肖华胜
Original assignee: Zhejiang Hai Rong Machinery Co Ltd
Current assignee: Zhejiang Hai Rong Machinery Co Ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-02-25
Anticipated expiration: 2029-06-12

Abstract

The utility model provides a needle valve body belongs to the valve field. The needle valve body has been seted up input channel and output channel on the needle valve body, has still seted up valve rod passageway, and valve rod passageway makes input channel and output channel communicate each other, has still seted up sampling channel on the needle valve body, and when input channel and output channel communicate, sampling channel and input channel intercommunication, sampling channel's outer end is the sample connection and can dismantle the connection sealing member. The valve body is convenient for sampling the medium.

Description

Needle valve body

Technical Field

The utility model belongs to the valve field relates to the needle valve body.

Background

The needle valve is a valve which can be accurately adjusted, and has wide application, such as cutting distance for flame cutting, and a knob for adjusting flame temperature is the needle valve. The needle valve of the instrument is an important component of a measuring pipeline system of the instrument, mainly comprises a stop valve and a ball valve, and has the function of opening or cutting off a pipeline passage. The valve core of the needle valve is a sharp cone which is inserted into the valve seat like a needle, so that the name of the needle valve is. The needle valve is applicable to high pressure environment, and the one end of needle valve is the input, and the other end is the output, and although the needle valve is generally used, the needle valve body still has certain problem.

The utility model discloses a utility model patent of 2013103569804, the invention name is a needle valve, a needle valve is described, including needle valve rod and disk seat, the bottom of needle valve rod is equipped with the valve plug, the disk seat bottom is equipped with the recess, be provided with the sealed pad in the recess, when closely fitting between valve plug and disk seat, the valve plug card is gone into to seal in the pad, as shown in the description attached drawing of above-mentioned patent, this needle valve sets up sealed the pad in the recess of disk seat bottom, because the cushioning effect of sealed pad, the valve rod pushes the excessive position when effectively avoiding using the needle valve, the damage of valve plug has been avoided, and the leakproofness when effectively having improved damming has prolonged the life of needle valve. In practice, due to the characteristics of the needle valve used in high pressure environments, once assembled, it is not removed unless there is a modification or damage to the piping, and in many cases, it is necessary for the analysis of the medium to be sampled, and due to the inconvenient removability of the needle valve, it is currently only possible to sample other areas of the system, which causes more uncertainty, and it is therefore necessary to design a structure that allows direct sampling at the needle valve.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide the needle valve body, this needle valve body is convenient for realize the medium sampling, has solved the current needle valve and is not convenient for medium sampling scheduling problem.

The purpose of the utility model can be realized by the following technical proposal: needle valve body, input channel and output channel have been seted up on the needle valve body, valve rod passageway has still been seted up, valve rod passageway makes input channel and output channel communicate each other, its characterized in that, sampling channel has still been seted up on the needle valve body, when input channel and output channel communicate, sampling channel with the input channel intercommunication, sampling channel's outer end is the sample connection and can dismantle the connection sealing member.

In this needle valve body, input channel's outer end is the input, and output channel's outer end is the output, and valve rod passageway is used for installing valve plug (valve rod), thereby goes up and down through control valve plug and realizes closing between output channel and the input channel and lead to. Sampling channel realizes taking a sample in needle valve department, and under normal operating condition, sealing member shutoff sample connection, sealing member can be dismantled sealing connection and connect in sample connection department, during the sample, opens and close the passageway with the valve plug and adjust to suitable pressure position and take off the sealing member and can realize sample work. The valve body is beneficial to medium sampling operation by additionally arranging the sampling channel, and sampling in other areas of the system is not needed.

According to the needle valve body, the sampling channel is communicated with the input channel if and only if the input channel is communicated with the output channel.

That is, when the output channel and the input channel are not communicated, the sampling channel is not directly communicated with the input channel, and only when the valve plug is lifted to enable the output channel and the output channel to be communicated, the sampling channel and the input channel are communicated. This kind of structure can prevent that input channel and sampling channel direct intercommunication from leading to the pressure too big.

In the needle valve body, the input channel and the output channel are arranged in a staggered manner.

Foretell needle valve body, needle valve body is inherent valve rod passageway department has to be the ring form to support and leans on the edge, support and lean on and have a first sealing washer on the top surface, input channel is located support and lean on along the upper right side, output channel is located support and lean on along left side below.

The valve plug upper end has to lean on the portion of leaning on to lean on along the top surface, realizes sealed through first sealing washer, and when valve plug upper end was leaned on the portion of leaning on and is realized seal installation, it was sealed to the input channel to lean on the portion lateral wall to lean on, leans on the portion bottom surface to realize sealing up to the output channel. The first seal ring is embedded in the annular groove.

In the needle valve body, the sampling channel and the valve rod channel are of an integrated coaxial structure.

Namely, the valve rod channel directly penetrates through the outer wall of the valve body of the needle valve when being processed.

Foretell needle valve body, sampling channel's cross-section is the T font, sampling channel's outer end tip inner wall has the screw thread, sampling channel outer end roof has the second sealing washer.

The end part of the outer end of the sampling channel is in threaded connection with a sealing element, sealing is realized through a second sealing ring, and the second sealing ring is embedded in the annular groove.

Foretell needle valve body, the one end of needle valve body is seted up the inner wall and is had the screwed input connecting hole, input channel's outer end with the input connecting hole communicates with each other.

The input connecting hole is used for being in threaded connection with the input pipe fitting.

In the needle valve body, the inner wall of the outer end of the input channel is provided with threads and is connected with a spring pressure reducing piece in a threaded manner.

Spring decompression spare is the one-way piece that inside has the spring promptly, the structure is the well-known technique, it is not repeated to describe, roughly including being the unequal shell of cylindric and internal diameter, inside has one-way piece and spring, the medium input leads to one-way piece to the motion of valve rod direction, the spring compression, offset partial input pressure, thereby play the decompression effect, the medium flows out from the place that the shell internal diameter is big (the internal diameter is greater than the region of one-way piece in the shell promptly), prevent that pressure from destroying valve rod or sealing washer by too strong, also can play the effect that prevents to flow back certainly simultaneously.

In the needle valve body, the outer end of the spring pressure reducing piece extends out of the outer end of the input channel, and the outer end of the spring pressure reducing piece is provided with the nut portion.

The outer end of the shell of the spring pressure reduction piece is provided with an integrally formed nut portion, the outer end of the spring pressure reduction piece is positioned in the input connecting hole, and the replacement and installation of the spring pressure reduction piece are facilitated through the nut portion.

In the needle valve body, the other end of the needle valve body is in a necking shape, and the outer wall of the needle valve body is provided with threads.

The necking end is an external thread and is arranged on the inner wall of the pipe fitting.

Compared with the prior art, the valve body of the needle valve has the following advantages:

1. this needle valve body passes through the design of sample structure, directly realizes medium sample operation, convenient operation in needle valve department.

2. Input channel and output channel among this needle valve body are dislocation structure design, and the cooperation is supported and is leaned on seal structure to realize binary channels effective seal.

3. This needle valve body design has external decompression single-way construction, prevents that medium pressure from destroying valve rod or sealing washer by force, also can play the effect that prevents the backward flow simultaneously, still makes decompression single-way construction easy dismounting in addition.

Drawings

FIG. 1 is a structural sectional view of the valve body of the needle valve.

Fig. 2 is a schematic structural view of a part of the region in fig. 1.

FIG. 3 is a schematic view of the structure of the inlet connection hole in the valve body of the needle valve.

List of reference numerals

In the figure:

1. a needle valve body;

1a, an input channel;

1b, an output channel;

1c, a valve stem channel;

1c1, sampling channel;

1d, a leaning edge;

1e, inputting a connecting hole;

2. a first seal ring;

3. a second seal ring;

4. a spring decompression member;

4a, a nut portion.

Detailed Description

As shown in fig. 1 to 3, the needle valve body 1 is provided with an input channel 1a and an output channel 1b, and is further provided with a valve rod channel 1c, the valve rod channel 1c enables the input channel 1a and the output channel 1b to be communicated with each other, the needle valve body 1 is further provided with a sampling channel 1c1, when the input channel 1a and the output channel 1b are communicated, the sampling channel 1c1 is communicated with the input channel 1a, and the outer end of the sampling channel 1c1 is a sampling port and can be detachably connected with a sealing member. In this needle valve body 1, the outer end of input channel 1a is the input, and the outer end of output channel 1b is the output, and valve rod passageway 1c is used for installing valve plug (valve rod), thereby goes up and down through control valve plug and realizes closing between output channel 1b and the input channel 1a and lead to. Sampling channel 1c1 realizes taking a sample in needle valve department, and under normal operating condition, sealing member shutoff sample connection, sealing connection can be dismantled to the sealing member in sample connection department, during the sample, opens and close the passageway with the valve plug and adjusts to suitable pressure position and take off the sealing member and can realize sample work. The valve body is beneficial to medium sampling operation by additionally arranging the sampling channel 1c1, and the sampling in the rest areas of the system is not needed.

Specifically, the sampling passage 1c1 communicates with the input passage 1a if and only if the input passage 1a and the output passage 1b communicate. That is, when there is no communication between the output passage 1b and the input passage 1a, there is no communication between the sampling passage 1c1 and the input passage 1a, and the sampling passage 1c1 is not directly communicated with the input passage 1a, and the sampling passage 1c1 is communicated with the input passage 1a only when the valve plug is lifted to communicate the output passage 1b with the output passage 1 b. This structure can prevent the input passage 1a from directly communicating with the sampling passage 1c1 to cause excessive pressure. The input channel 1a and the output channel 1b are arranged in a staggered manner. The needle valve body 1 is internally provided with a circular abutting edge 1d at a valve rod channel 1c, a first sealing ring 2 is arranged on the top surface of the abutting edge 1d, an input channel 1a is positioned at the upper right of the abutting edge 1d, and an output channel 1b is positioned at the lower left of the abutting edge 1 d. The valve plug upper end has to lean on the portion of leaning on to lean on along 1d top surface, realizes sealed through first sealing washer 2, and when valve plug upper end was leaned on the portion of leaning on and is realized seal installation, the portion of leaning on lateral wall was sealed to input channel 1a realization, and the portion of leaning on bottom surface is sealed to output channel 1b realization. The first seal ring 2 is fitted in the annular groove. The sampling passage 1c1 and the stem passage 1c are of an integral coaxial structure. Namely, the valve rod channel 1c is directly penetrated through the outer wall of the needle valve body 1 when being processed.

Specifically, the sampling passage 1c1 has a T-shaped cross section, the inner wall of the outer end of the sampling passage 1c1 is threaded, and the top wall of the outer end of the sampling passage 1c1 is provided with the second seal ring 3. The outer end of the sampling passage 1c1 is screwed with a sealing member, and the sealing is realized by a second sealing ring 3, and the second sealing ring 3 is embedded in the annular groove. One end of the needle valve body 1 is provided with an input connecting hole 1e with a thread on the inner wall, and the outer end of the input channel 1a is communicated with the input connecting hole 1 e. The input connection hole 1e is for threaded connection with an input pipe member. The inner wall of the outer end of the input channel 1a is provided with threads and is connected with a spring pressure reducing piece 4 through the threads. Spring decompression spare 4 is the one-way piece that inside has the spring promptly, the structure is the well-known technique, it is not repeated to describe, roughly including being the unequal shell of cylindric and internal diameter, inside has one-way piece and spring, medium input leads to one-way piece to the motion of valve rod direction, the spring compression, offset partial input pressure, thereby play the decompression effect, the medium flows out from the place that the shell internal diameter is big (internal diameter is greater than the region of one-way piece in the shell promptly), prevent that pressure from destroying valve rod or sealing washer by too strong, also can play the certain effect that prevents to flow back simultaneously. The outer end of the spring relief 4 protrudes out of the outer end of the input passage 1a and the outer end of the spring relief 4 has a nut portion 4 a. That is, the outer end of the housing of the spring decompression member 4 has a nut portion 4a formed integrally, and the outer end of the spring decompression member 4 is located in the input connection hole 1e, so that the replacement and installation of the spring decompression member 4 are facilitated by the nut portion 4 a. The other end of the needle valve body 1 is in a necking shape, and the outer wall of the needle valve body is provided with threads. The necking end is an external thread and is arranged on the inner wall of the pipe fitting.

Details, structures, dimensions and principles not mentioned in the present application are all known in the art or can be obtained by simple selection of those skilled in the art, and are not described in detail.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. Needle valve body, input channel and output channel have been seted up on the needle valve body, valve rod passageway has still been seted up, valve rod passageway makes input channel and output channel communicate each other, its characterized in that, sampling channel has still been seted up on the needle valve body, when input channel and output channel communicate, sampling channel with the input channel intercommunication, sampling channel's outer end is the sample connection and can dismantle the connection sealing member.

2. The needle valve body of claim 1, wherein the sampling passage communicates with the inlet passage if and only if the inlet passage and the outlet passage communicate.

3. The needle valve body of claim 1 or 2, wherein the inlet and outlet passages are offset.

4. The needle valve body of claim 3, wherein the needle valve body has a circular abutting edge at the valve stem passage, the abutting edge has a first seal ring on the top surface, the input passage is located the abutting edge is located the upper right, the output passage is located the abutting edge is located the lower left.

5. The needle valve body of claim 1, 2 or 4, wherein the sampling passage and the stem passage are of a unitary coaxial construction.

6. The needle valve body of claim 1, 2 or 4, wherein the cross section of the sampling channel is T-shaped, the inner wall of the outer end part of the sampling channel is provided with threads, and the top wall of the outer end of the sampling channel is provided with a second sealing ring.

7. The needle valve body according to claim 1, 2 or 4, wherein an input connection hole with a thread on the inner wall is formed at one end of the needle valve body, and the outer end of the input channel is communicated with the input connection hole.

8. The needle valve body of claim 7, wherein the inner wall of the outer end of the inlet passage is threaded and a spring relief is threaded.

9. The needle valve body of claim 8 wherein an outer end of the spring relief extends beyond an outer end of the inlet passage and the outer end of the spring relief has a nut portion.

10. The needle valve body of claim 1, 2 or 4, wherein the other end of the needle valve body is in the shape of a throat and the outer wall is threaded.