CN214466377U

CN214466377U - Combination valve body suitable for safe pressure relief operation of sampling steel bottle

Info

Publication number: CN214466377U
Application number: CN202120550209.0U
Authority: CN
Inventors: 郭庆; 凃士雄; 凃志兴
Original assignee: Jpe Yean Hern Co ltd
Current assignee: Jpe Yean Hern Co ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-10-22
Anticipated expiration: 2031-03-17

Abstract

The utility model relates to a combination valve body suitable for sample steel bottle safety pressure release operation, it includes stop valve portion and pressure release valve portion. The cut-off valve part comprises a cut-off valve body, a valve rod, a packing nut and a sealing element unit. A valve rod installation cavity, a transition cavity, a medium discharge cavity and a medium inlet cavity are formed in the stop valve body. The sealing element unit is filled in the valve rod installation cavity, and circumferential sealing of the valve rod is realized by means of the downward pressure of the packing nut. The transition cavity is formed by the downward continuation of the diapire of valve rod installation cavity, and until running through by the valve body. The medium discharge cavity and the medium inlet cavity are formed by extending the left side wall and the right side wall of the stop valve body inwards, and are respectively communicated with the transition cavity and the valve rod installation cavity in a one-to-one correspondence manner. The valve rod is inserted in the valve rod installation cavity, and the on/off state of the valve rod installation cavity and the transition cavity is changed by adjusting the axial relative position of the valve rod installation cavity. The pressure relief valve portion is integrally assembled with the shut-off valve portion and is in direct communication with the transition chamber.

Description

Combination valve body suitable for safe pressure relief operation of sampling steel bottle

Technical Field

The utility model relates to a valve manufacturing technology field especially relates to a combination valve body suitable for operation of sample steel bottle safety pressure release.

Background

In traditional pipeline sampling, a sampling steel cylinder is the most common sampling mode, namely, fluid is taken out by injecting the fluid into the steel cylinder and then connecting the fluid through a stop valve. The method is widely applied to the industries of petroleum refining, chemical industry, papermaking, pharmacy, water conservancy, electric power, steel and the like, and plays a significant role in national economy. According to the U.S. DOT regulations and CGAS-1.1 regulations, compressed gas cylinders must be equipped with a pressure relief device, so proper charging of the cylinder is extremely important to prevent over-pressurization.

As shown in fig. 1, the sampling cylinder must be used with a pressure relief valve to ensure safety in use. In the prior art, the pressure relief valve is usually selected as a rupture disk pressure relief valve. When the pressure exceeds the pressure-bearing range of the safety membrane, the safety membrane is broken, and the medium (gas or fluid) is discharged along with the rupture, so that the pressure relief effect is realized. Although the application of the rupture disk pressure relief valve can better ensure the safety of the sampling steel cylinder, the following problems still exist in the practical application process: 1) the safety film of the safety film pressure relief valve is a disposable product, and needs to be replaced in time after being damaged so as to prepare for next pressure relief control, however, the disassembly and assembly operations of the safety film are very inconvenient, time-consuming and labor-consuming, and are not easy to perform later maintenance; 2) the response speed of the safety film pressure release valve is slow, so that the phenomenon that the sampling steel cylinder cannot be subjected to pressure release in time is caused, and further safety risks are caused;

3) when the safety film is broken, the medium in the sampling steel cylinder leaks all the time until human factors intervene, so that the medium in the sampling steel cylinder is wasted greatly; and when the temperature of the leaked medium is high or the leaked medium contains toxicity, certain potential safety hazards can be caused even to the personal safety of operators. Thus, a skilled person is urgently needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

Therefore, in view of the above-mentioned existing problems and defects, the present invention provides a combination valve suitable for the safe pressure relief operation of a sampling steel cylinder, which is designed by collecting relevant data, evaluating and considering in many ways, and continuously performing experiments and modifications by years of research and development experience technicians engaged in the industry.

In order to solve the technical problem, the utility model relates to a combination valve body suitable for sample steel bottle safety pressure release operation, it includes by valve portion and pressure release valve portion. The cut-off valve part comprises a cut-off valve body, a valve rod, a packing nut and a sealing element unit. A valve stem mounting boss is formed by the top wall of the stop valve body continuing to extend upward. A valve rod mounting cavity for inserting the valve rod is formed in the valve rod mounting boss, and the valve rod mounting cavity extends to the inside of the stop valve body. The sealing element unit is filled in the valve rod mounting cavity and is used for realizing circumferential sealing on the valve rod by means of the downward pressure of the packing nut; the packing nut is screwed onto the valve stem mounting boss to effect compression of the packing unit. A transition cavity, a medium discharge cavity and a medium inlet cavity are formed in the stop valve body. The transition cavity is formed by the downward continuation of the diapire of valve rod installation cavity, and until running through by the valve body. The medium discharge cavity and the medium inlet cavity are formed by extending the left side wall and the right side wall of the stop valve body inwards, and are respectively communicated with the transition cavity and the valve rod installation cavity in a one-to-one correspondence manner. The valve rod is inserted in the valve rod installation cavity, and the on/off state of the valve rod installation cavity and the transition cavity is changed by adjusting the axial relative position of the valve rod installation cavity. The pressure relief valve part is integrally assembled with the cut-off valve part and directly communicated with the transition cavity.

As the further improvement of the technical proposal of the utility model, the pressure relief valve part comprises a pressure relief valve body, a pressure relief spring and a pressure relief valve core. The pressure relief valve body adopts a detachable mode to realize the connection with the stop valve body. A valve core accommodating cavity and a relief cavity are formed in the relief valve body. The valve core accommodating cavity is used for accommodating the pressure relief spring and the pressure relief valve core at the same time and is directly communicated with the transition cavity. The pressure relief valve core blocks the lower port of the transition cavity by the elastic abutting force action of the pressure relief spring. The pressure relief valve body is arranged in the valve core accommodating cavity, and the pressure relief cavity extends downwards from the bottom wall of the valve core accommodating cavity continuously until penetrating through the pressure relief valve body.

As the utility model discloses technical scheme's further improvement, pressure release valve body and stop valve body are inserted and are joined in marriage mutually, and borrow by the vice realization of screw thread and can dismantle the hookup, correspondingly, upwards extend by the diapire of stop valve body have with the installation cavity that inserts of relief valve body looks adaptation.

As a further improvement of the technical proposal of the utility model, the pressure relief valve part also comprises a rubber sealing ring. The rubber sealing ring is sleeved on the pressure relief valve body and is always elastically pressed between the pressure relief valve body and the stop valve body after the pressure relief valve part is inserted and matched relative to the stop valve part.

As a further improvement of the technical proposal of the utility model, the combined valve body suitable for the safe pressure relief operation of the sampling steel cylinder comprises a pipe joint. The pipe joint adopts a detachable mode to realize the connection with the pressure relief valve body and is directly communicated with the drainage cavity.

Through adopting above-mentioned technical scheme to set up, borrow the control of borrowing the assembly of by valve portion and pressure release valve portion in order to realize the sample steel bottle inner chamber pressure. When the pressure in the inner cavity of the sampling steel cylinder is lower than a rated standard value, the pressure relief valve part is not opened and is in a sealing state; when the pressure in the inner cavity of the sampling steel cylinder exceeds a standard value, the pressure relief valve is opened instantly, and the medium in the pressure relief valve is discharged, so that the pressure relief effect is realized. Therefore, on one hand, the combined valve body integrates the stopping function and the pressure relief function into a whole, has a compact design structure, and is beneficial to the subsequent realization and the installation operation of the sampling steel cylinder; on the other hand, the pressure relief valve part has a faster response speed, which is beneficial to ensuring higher application safety of the sampling steel cylinder and reducing the external leakage of the sampling steel cylinder as much as possible; on the other hand, the combined valve body has stable service life and can be subjected to multiple pressure relief cycles, so that the later maintenance cost is effectively reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a diagram of a prior art rupture disk relief valve in use on a steel recovery cylinder.

Fig. 2 is a schematic perspective view of the combined valve body suitable for the safe pressure relief operation of the sampling steel cylinder of the present invention.

Fig. 3 is a front view of fig. 2.

Fig. 4 is a side view of fig. 2.

Fig. 5 is a sectional view a-a of fig. 4.

1-a cut-off valve portion; 11-a shut-off valve body; 111-valve stem mounting boss; 1111-a valve rod mounting cavity; 112-a transition chamber; 113-media discharge chamber; 114-media entrance chamber; 115-plug mounting cavities; 12-a valve stem; 13-a packing nut; 14-a seal unit; 2-a relief valve portion; 21-a pressure relief valve body; 211-a spool receiving cavity; 212-a drainage lumen; 22-a pressure relief spring; 23-a pressure relief valve core; 24-a rubber sealing ring; 3-pipe joint.

Detailed Description

In the description of the present invention, it is to be understood that the terms "left", "right", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The technical solution disclosed in the present invention will be further described in detail with reference to the following embodiments, and fig. 2 and 3 respectively show a schematic perspective view and a front view of a combined valve body suitable for the safe pressure relief operation of a sampling steel cylinder, and it can be seen that the combined valve body mainly comprises a stop valve portion 1 and a pressure relief valve portion 2. The shut-off valve unit 1 includes a shut-off valve body 11, a valve rod 12, a packing nut 13, and a packing unit 14. A stem mounting boss 111 is formed extending upward from the top wall of the shut-off valve body 11. A stem mounting cavity 1111 into which the stem is inserted is formed in the stem mounting boss 111 and extends all the way to the inside of the check valve body 11. The packing unit 14 is filled in the stem mounting cavity 1111, and circumferential sealing of the stem 12 is achieved by the downward pressure of the packing nut 13. The packing nut 13 is screwed on the valve rod mounting boss 111 to press the sealing element unit 14, and correspondingly, an external thread matched with the packing nut 13 is arranged on the outer side wall of the valve rod mounting boss 111. In addition, a transition chamber 112, a medium discharge chamber 113, and a medium inlet chamber 114 are also opened in the shutoff valve body 11. The transition chamber 112 is formed by the bottom wall of the valve rod installation chamber 1111 extending downwards and continuing to penetrate the check valve body 11. The medium discharge chamber 113 and the medium inlet chamber 114 are formed by extending the left and right side walls of the check valve body 11 inward, and are respectively communicated with the transition chamber 112 and the valve rod installation chamber 1111 in a one-to-one correspondence manner. The valve rod 12 is inserted into the valve rod mounting cavity 1111, and the on/off state of the valve rod mounting cavity 1111 and the transition cavity 112 is changed by adjusting the axial relative position of the valve rod 12. The relief valve portion 2 is integrally assembled with the cut-off valve portion 1, and it directly communicates with the transition chamber 112 (as shown in fig. 4 and 5).

The working principle of the combined valve body suitable for the safe pressure relief operation of the sampling steel cylinder is as follows: when the pressure in the inner cavity of the sampling steel cylinder is lower than a rated standard value, the pressure relief valve part 2 cannot be opened, so that the sampling steel cylinder is kept in a sealed state to maintain the stability of the pressure in the external sampling tube; when the pressure in the inner cavity of the sampling steel cylinder exceeds the standard value, the pressure relief valve part 2 is opened instantly, and the medium in the sampling steel cylinder is discharged along with the pressure relief valve part, so that the pressure relief effect is realized.

Through adopting above-mentioned technical scheme to set up, following beneficial technological effect has been obtained at least:

1) the combined valve body integrates the stopping function and the pressure relief function into a whole, has a compact design structure, and is beneficial to the subsequent realization of the installation operation with a sampling steel cylinder;

2) the pressure relief valve part 2 has a faster response speed, which is beneficial to ensuring higher application safety of the sampling steel cylinder and reducing the external leakage of the sampling steel cylinder as much as possible;

3) the combined valve body has stable service life, can be subjected to multiple pressure relief cycles, and does not need staff to intervene in the process for maintenance, thereby effectively reducing the later maintenance cost.

As a further refinement of the above-described combination valve structure suitable for the safe relief operation of the sampling cylinder, the relief valve portion 2 is mainly composed of several parts, such as a relief valve body 21, a relief spring 22, and a relief valve body 23, as shown in fig. 4 and 5. The relief valve body 21 is detachable from the shut-off valve body 11 by a screw pair. A plug-in mounting cavity 115 which is matched with the pressure relief valve body 21 and is directly communicated with the transition cavity 112 extends upwards from the bottom wall of the stop valve body 11. The outer side wall of the pressure relief valve body 21 is provided with a connecting external thread, and correspondingly, the side wall of the inserting and assembling installation cavity 213 is provided with a connecting internal thread matched with the connecting external thread. A spool accommodating chamber 211 and a relief chamber 212 are provided in the relief valve body 21. The spool accommodating chamber 211 is used to accommodate both the relief spring 22 and the relief spool 23, and directly communicates with the transition chamber 112. The relief valve core 23 blocks the lower port of the transition chamber 112 by the elastic urging force of the relief spring 22. The relief chamber 212 extends downward from the bottom wall of the valve element accommodating chamber and extends through the relief valve body 21 to communicate with the external environment. The insertion and installation cavity 213 is formed by extending upward from the bottom wall of the check valve body 11 to accommodate the relief valve body 21. Through the application of the design combination of the pressure relief spring 22 and the pressure relief valve core 23, when the pressure of the inner cavity of the sampling steel cylinder acting on the pressure relief valve core 23 is smaller than the elastic force of the pressure relief spring 22, the pressure relief valve core 23 seals the transition cavity 112 to block the transition cavity 112 and the flow relief cavity 212, so that the sampling steel cylinder is kept in a sealed state; when the pressure acting on the pressure relief valve core 23 by the pressure in the inner cavity of the sampling steel cylinder is greater than the elastic force of the pressure relief spring 22, the pressure relief valve core 23 moves downwards to remove the blockage of the transition cavity 112, so that the transition cavity 112 and the flow relief cavity 212 are kept in a mutually communicated state, and at the moment, the pressure in the sampling steel cylinder is instantaneously reduced.

It should be noted that, in addition to the above-mentioned screw pair connection, the pressure relief valve portion 2 may also be detachably connected to the stop valve portion 1 in other ways according to different application scenarios, for example: snap-fit or interference fit, etc. (not shown).

The combined valve is found to have the following problems in the initial experimental stage of the combined valve suitable for the safe pressure relief operation of a sampling steel cylinder: no matter a screw pair connection mode or a time buckling connection mode is adopted, the contact area between the stop valve part 1 and the pressure relief valve part 2 is easy to have leakage problem, and the health of an operator is easy to be endangered under the condition that a medium is high-temperature and toxic, therefore, as the further optimization of the combined valve body structure suitable for the safe pressure relief operation of the sampling steel cylinder, the pressure relief valve part 2 is additionally provided with the rubber sealing ring 24. The rubber seal 24 is fitted around the pressure relief valve body 21 and is always elastically pressed between the pressure relief valve body 21 and the shut-off valve body 11 when the insertion and fitting of the pressure relief valve portion 2 with respect to the shut-off valve portion 1 is completed (as shown in fig. 4 and 5).

Finally, as shown in fig. 4 and 5, a pipe joint 3 is added to the relief valve body 21. The pipe joint 3 is detachably connected with the pressure relief valve body 21, one end of the pipe joint is directly communicated with the pressure relief cavity 212, and the other end of the pipe joint is directly communicated with the external discharge pipeline, so that the phenomenon that an overflowing medium (especially a high-temperature and toxic medium) is directly discharged is avoided, the external environment is effectively prevented from being polluted, and the personal safety of an operator is ensured.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A combined valve body suitable for safe pressure relief operation of a sampling steel cylinder is characterized by comprising a stop valve part and a pressure relief valve part; the stop valve part comprises a stop valve body, a valve rod, a packing nut and a sealing element unit; a valve rod mounting lug boss is formed by continuously extending upwards from the top wall of the stop valve body; a valve rod mounting cavity for inserting the valve rod is formed in the valve rod mounting boss, and the valve rod mounting cavity extends into the stop valve body; the sealing element unit is filled in the valve rod installation cavity and realizes circumferential sealing on the valve rod by means of the downward pressure of the packing nut; the packing nut is screwed on the valve rod mounting boss to realize the compression of the sealing element unit; a transition cavity, a medium discharge cavity and a medium inlet cavity are formed in the stop valve body; the transition cavity is formed by continuously extending the bottom wall of the valve rod installation cavity downwards until penetrating through the stop valve body; the medium discharge cavity and the medium inlet cavity are formed by extending the left side wall and the right side wall of the stop valve body inwards, and are respectively communicated with the transition cavity and the valve rod installation cavity in a one-to-one correspondence manner; the valve rod is inserted in the valve rod mounting cavity, and the on/off state of the valve rod mounting cavity and the transition cavity is changed by adjusting the axial relative position of the valve rod; the pressure relief valve portion is integrally assembled with the shut-off valve portion and is directly communicated with the transition cavity.

2. The combination valve body adapted for use in a safety relief operation on a sampling cylinder as defined in claim 1, wherein said relief valve portion comprises a relief valve body, a relief spring, and a relief valve spool; the pressure relief valve body is detachably connected with the stop valve body; a valve core accommodating cavity and a drainage cavity are formed in the pressure relief valve body; the valve core accommodating cavity is used for accommodating the pressure relief spring and the pressure relief valve core at the same time and is directly communicated with the transition cavity; the pressure relief valve core seals the lower port of the transition cavity by the elastic abutting force action of the pressure relief spring; the pressure relief valve body is arranged in the valve core accommodating cavity, and the pressure relief cavity extends downwards from the bottom wall of the valve core accommodating cavity until penetrating through the pressure relief valve body.

3. The combination valve body suitable for the safe pressure relief operation of a sampling steel cylinder as claimed in claim 2, wherein the pressure relief valve body is inserted and matched with the stop valve body, and is detachably connected by a thread pair, and correspondingly, an insertion and matching installation cavity matched with the pressure relief valve body extends upwards from the bottom wall of the stop valve body.

4. The combination valve body adapted for use in a safety relief operation on a sampling cylinder of claim 3, wherein said relief valve portion further comprises a rubber sealing ring; the rubber sealing ring is sleeved on the pressure relief valve body, and when the pressure relief valve part is inserted and matched with the stop valve part, the pressure relief valve part is always elastically pressed between the pressure relief valve body and the stop valve body.

5. The combination valve body suitable for use in a sampling cylinder safety relief operation according to any one of claims 2-4, further comprising a pipe connector; the pipe joint is detachably connected with the pressure relief valve body and is directly communicated with the pressure relief cavity.