Medium conveying system

Abstract

The utility model discloses a medium conveying system which comprises a medium source, a first medium conveying pipe, a second medium conveying pipe and a self-operated pressure reducing valve, the first medium conveying pipe is communicated with the medium source, and the second medium conveying pipe is located on the downstream of the first medium conveying pipe and communicated with the first medium conveying pipe. The second medium conveying pipe is used for conveying media to downstream users, the self-operated pressure reducing valve is arranged on the first medium conveying pipe, and a pressure measuring point of the self-operated pressure reducing valve is arranged on the second medium conveying pipe. According to the medium conveying system, the position of the pressure measuring point of the self-operated pressure reducing valve is optimized, the pressure measuring point of the self-operated pressure reducing valve is arranged on the second medium conveying pipe connected with the downstream user, and compared with the prior art that the pressure measuring point is arranged on the flange of the self-operated pressure reducing valve, the pressure measuring point is arranged on the flange of the self-operated pressure reducing valve. The pressure and flow requirements of conveying media of downstream users can be guaranteed, the adjusting performance of the self-operated pressure reducing valve can be improved, and the reliability of a system is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, and more specifically, to a medium conveying system. Background Art

[0002] Self-operated pressure reducing valves are widely used in nuclear power plants and industrial fields to control the medium pressure in pipelines to meet the needs of downstream users. In the prior art, the pressure point of the self-operated pressure reducing valve is generally set at the downstream flange of the valve. If there is a diameter change in the downstream pipeline, the valve will fluctuate frequently or the opening will be too small, affecting the regulating effect of the valve, failing to meet the needs of downstream users and affecting the reliability of the system.

[0003] Therefore, how to improve the reliability of the medium delivery system has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] In view of this, an object of the present invention is to provide a medium conveying system to improve the reliability of the system.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A medium conveying system, comprising:

[0007] Medium source;

[0008] A first medium delivery pipe, the first medium delivery pipe is connected to a medium source;

[0009] a second medium delivery pipe, the second medium delivery pipe is located downstream of the first medium delivery pipe and is in communication with the first medium delivery pipe, and the second medium delivery pipe is used to deliver the medium to a downstream user;

[0010] A self-operated pressure reducing valve is arranged on the first medium conveying pipe, and a pressure taking point of the self-operated pressure reducing valve is arranged on the second medium conveying pipe.

[0011] Optionally, in the above medium conveying system, the conveying medium is compressed air.

[0012] Optionally, in the above medium delivery system, the diameter of the first medium delivery pipe is the same as or different from the diameter of the second medium delivery pipe.

[0013] Optionally, in the above medium delivery system, the self-operated pressure reducing valve is flange-connected to the first medium delivery pipe.

[0014] Optionally, in the above medium conveying system, a pressure taking joint is provided at the pressure taking point of the self-operated pressure reducing valve, and the pressure taking pipe of the self-operated pressure reducing valve is connected to the pressure taking joint.

[0015] Optionally, in the above medium conveying system, the pressure taking pipe is connected to the pressure taking joint by a ferrule.

[0016] Optionally, in the above medium delivery system, a shut-off valve is provided on the second medium delivery pipe, and the pressure tapping joint is located upstream of the shut-off valve.

[0017] Optionally, in the above medium delivery system, a pressure gauge is provided on the second medium delivery pipe, and the pressure gauge is provided between the pressure tapping joint and the shut-off valve.

[0018] Optionally, in the above medium delivery system, a pressure gauge connector is provided at the installation position of the pressure gauge, and an instrument tube of the pressure gauge is connected to the pressure gauge connector.

[0019] Optionally, in the above medium delivery system, a flow meter is provided on the second medium delivery pipe, and the flow meter is located downstream of the shut-off valve.

[0020] The medium conveying system disclosed by the utility model optimizes the position of the pressure taking point of the self-operated pressure reducing valve. The pressure taking point of the self-operated pressure reducing valve is set on a second medium conveying pipe connected to a downstream user. The opening of the self-operated pressure reducing valve can be adjusted according to the pressure demand of the downstream user, and the pressure of the medium conveyed by the second medium conveying pipe can be controlled. The pressure of the pressure taking point of the self-operated pressure reducing valve is the pressure of the downstream user that needs to be adjusted. Compared with the prior art in which the pressure taking point is set at the flange of the self-operated pressure reducing valve, the pressure and flow demand of the conveying medium of the downstream user can be guaranteed, the adjustment performance of the self-operated pressure reducing valve can be improved, and the reliability of the system can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 The present invention is a flow chart of a medium conveying system disclosed in an embodiment of the present utility model.

[0023] Among them, 10 is a first medium delivery pipe, 20 is a self-operated pressure reducing valve, 30 is a second medium delivery pipe, 40 is a pressure tapping joint, 50 is a pressure gauge joint, 60 is a shut-off valve, and 70 is a flow meter. DETAILED DESCRIPTION

[0024] The core of the utility model is to disclose a medium conveying system to improve the reliability of the system.

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1 As shown, the embodiment of the utility model discloses a medium conveying system, including a medium source, a first medium conveying pipe 10 , a second medium conveying pipe 30 and a self-operated pressure reducing valve 20 .

[0027] It should be noted that the medium conveying system disclosed in the embodiment of the utility model can convey a liquid or a gas, which is not specifically limited here. The medium source can be a storage container for storing the medium, or a centralized medium conveying method can be adopted. If the conveying medium is a gas, the medium source can be a gas cylinder, or a centralized gas supply method can be adopted, such as taking gas from a main gas supply pipe.

[0028] The first medium delivery pipe 10 is connected to the medium source, the second medium delivery pipe 30 is located downstream of the first medium delivery pipe 10 and is connected to the first medium delivery pipe 10, the second medium delivery pipe 30 is used to deliver the medium to the downstream user, the self-operated pressure reducing valve 20 is arranged on the first medium delivery pipe 10, and is flange-connected to the first delivery pipe 10, and the pressure taking point of the self-operated pressure reducing valve 20 is arranged on the second medium delivery pipe 30. The self-operated pressure reducing valve 20 adjusts the flow rate of the conveying medium by controlling the opening of the opening and closing member in the valve body to reduce the pressure of the conveying medium, and at the same time adjusts the opening of the opening and closing member by means of the pressure after the valve, so that the pressure after the valve is kept within a certain range, and the outlet pressure is kept within the set range when the inlet pressure is constantly changing.

[0029] It should be noted that the first medium delivery pipe 10 here includes not only one specification of medium delivery pipe, but also multiple specifications of medium delivery pipes connected in sequence. The specification here refers to the pipe diameter. The second medium delivery pipe 30 refers to the medium delivery pipe located at the end of the system and connected to the downstream user. The pressure of the medium delivered in the second medium delivery pipe 30 is the medium pressure required by the downstream user. The pressure point of the self-operated pressure reducing valve 20 is set on the second medium delivery pipe 30, that is, the opening can be adjusted according to the required pressure of the downstream user.

[0030] In a specific embodiment of the present utility model, Figure 1As shown in the figure, the nominal diameter of the first medium delivery pipe 10 is 32 mm, and the nominal diameter of the second medium delivery pipe 30 is 50 mm. In the prior art, the pressure taking point of the self-operated pressure reducing valve 20 is set at the downstream flange position of the self-operated pressure reducing valve 20 (for the convenience of explanation, hereinafter referred to as the existing scheme). The utility model sets the pressure taking point of the self-operated pressure reducing valve 20 on the second medium delivery pipe 30 (for the convenience of explanation, hereinafter referred to as the utility model scheme). Under the condition of ensuring that the outlet pressure of the self-operated pressure reducing valve 20 is the same, the opening of the self-operated pressure reducing valve 20 in the existing scheme is small, and the pressure and flow of the downstream users are smaller than the pressure and flow of the downstream users of the present scheme, and the needs of the downstream users cannot be met.

[0031] The medium conveying system disclosed in the embodiment of the utility model optimizes the position of the pressure taking point of the self-operated pressure reducing valve 20, so that the pressure taking point of the self-operated pressure reducing valve 20 is set on the medium conveying pipe that needs to adjust the pressure, rather than the downstream flange position of the self-operated pressure reducing valve 20, which can meet the pressure requirements of downstream users, improve the adjustment performance of the pressure reducing valve, and ensure the reliability of the system.

[0032] In some specific embodiments, the conveying medium is compressed air.

[0033] In some specific embodiments, a pressure taking joint 40 is provided at the pressure taking point of the self-operated pressure reducing valve 20, and the pressure taking pipe of the self-operated pressure reducing valve 20 is connected to the pressure taking joint 40 by a sleeve. The setting of the pressure taking joint 40 facilitates the connection between the pressure taking pipe and the second medium delivery pipe 30, and the connection is quick and convenient.

[0034] In some specific embodiments, a shut-off valve 60 is provided on the second medium delivery pipe 30, and the pressure tapping joint 40 is located upstream of the shut-off valve 60. The shut-off valve 60 can be a ball valve, a manual ball valve, or an electric ball valve. The shut-off valve 60 can also be a butterfly valve or other valves that can perform a shut-off function.

[0035] In order to conveniently measure the pressure of the medium transported by the second medium transport pipe 30, a pressure gauge is provided on the second medium transport pipe 30, and the pressure gauge is provided between the pressure tapping joint 40 and the shut-off valve 60. In some embodiments, a pressure gauge joint 50 is provided at the installation position of the pressure gauge, and the instrument pipe of the pressure gauge and the pressure gauge joint 50 can be connected by a threaded connection or a ferrule connection.

[0036] In order to facilitate the measurement of the flow rate of the medium transported by the second medium delivery pipe 30, a flow meter 70 is provided on the second medium delivery pipe 30. Specifically, the flow meter 70 is located downstream of the shut-off valve 60. The flow meter 70 can be a vortex flow meter, which is flange-connected to the second medium delivery pipe 30. The flow meter 70 can also be an ultrasonic flow meter or other types, which are not specifically limited here.

[0037] In a specific embodiment of the present invention, the conveying medium is compressed air, and the pressure of the compressed air entering the first medium conveying pipe 10 is 800pa, and the outlet pressure of the self-operated pressure reducing valve 20 is kept the same. The pressure and flow rate of the conveying medium in the second medium conveying pipe 30 in the existing solution and the solution of the present invention are measured respectively, and the measurement results are shown in the following table:

[0038]

[0039] The pressure of the conveying medium measured by the existing solution is 100 Pa, and the flow rate is 5 m³ / h. The pressure of the conveying medium measured by the solution of the utility model is 700 Pa, and the flow rate is 59.83 m³ / h. It can be seen that the pressure and flow rate of the conveying medium of the solution of the utility model are increased compared with the existing solution, which solves the problem in the prior art that the opening of the self-operated pressure reducing valve 20 is too small to meet the flow rate required by downstream users, meets the on-site use requirements, and at the same time, the adjustment performance of the self-operated pressure reducing valve 20 is improved, thereby improving the reliability of the system.

[0040] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0041] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0042] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0043] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A medium conveying system, characterized in that: include: Medium source; A first medium delivery pipe (10), the first medium delivery pipe (10) being connected to the medium source; a second medium delivery pipe (30), the second medium delivery pipe (30) being located downstream of the first medium delivery pipe (10) and being in communication with the first medium delivery pipe (10), the second medium delivery pipe (30) being used to deliver the medium to a downstream user; A self-operated pressure reducing valve (20), wherein the self-operated pressure reducing valve (20) is arranged on the first medium conveying pipe (10), and a pressure taking point of the self-operated pressure reducing valve (20) is arranged on the second medium conveying pipe (30).

2. The medium delivery system according to claim 1, characterized in that: The conveying medium is compressed air.

3. The medium delivery system according to claim 2, characterized in that: The diameter of the first medium delivery pipe (10) is the same as or different from the diameter of the second medium delivery pipe (30).

4. The medium delivery system according to claim 3, characterized in that: The self-operated pressure reducing valve (20) is flange-connected to the first medium delivery pipe (10).

5. The medium delivery system according to claim 4, characterized in that: A pressure-taking joint (40) is provided at the pressure-taking point of the self-operated pressure-reducing valve (20), and a pressure-taking pipe of the self-operated pressure-reducing valve (20) is connected to the pressure-taking joint (40).

6. The medium delivery system according to claim 5, characterized in that: The pressure taking pipe is connected to the pressure taking joint (40) by means of a sleeve.

7. The medium delivery system according to claim 5, characterized in that: A shut-off valve (60) is provided on the second medium delivery pipe (30), and the pressure tapping connector (40) is located upstream of the shut-off valve (60).

8. The medium delivery system according to claim 7, characterized in that: The second medium delivery pipe (30) is provided with a pressure gauge, and the pressure gauge is arranged between the pressure tapping joint (40) and the shut-off valve (60).

9. The medium delivery system according to claim 8, characterized in that: A pressure gauge joint (50) is provided at the installation position of the pressure gauge, and an instrument tube of the pressure gauge is connected to the pressure gauge joint (50).

10. The medium delivery system according to claim 7, characterized in that: The second medium delivery pipe (30) is provided with a flow meter (70), and the flow meter (70) is located downstream of the shut-off valve (60).

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