Exhaust connecting system and exhaust device

Abstract

The utility model discloses an exhaust connecting system and an exhaust device. The system comprises a first connector, a second connector, a third connector, a first switch valve, a second switch valve, a third switch valve, a first pressure measuring element and a second pressure measuring element. The first and second joints are connected with first and second pipelines of an external instrument; the third joint is used for being connected with an external pressure pump set for conveying a liquid medium; the third connector is connected with the first end of the third switch valve, the second end of the third switch valve is connected with the first ends of the first switch valve and the second switch valve, the second end of the first switch valve is connected with the first connector, and the second end of the second switch valve is connected with the second connector. A first pressure measuring element is connected to a pipeline for connecting the second end of the third switch valve with the first ends of the first and second switch valves; a second pressure measuring element is connected to a pipeline connecting the third connector and the first end of the third switch valve. The system can ensure that gas can be completely exhausted from the instrument pipeline in the online troubleshooting process, and the safety of the operation process is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to water filling and air exhausting technical field especially, relates to an exhaust connection system and exhaust device. BACKGROUND

[0002] In industrial field, differential pressure transmitter has a large number of applications, is used to measure industrial field liquid level, flow or pressure parameter.In the application process of differential pressure transmitter, differential pressure transmitter has more fluctuation phenomenon, and the main reason of causing instrument fluctuation is that there is air in instrument pipeline, leads to the existence of larger fluctuation of instrument pipeline when pressure measurement, in order to avoid this problem, needs to carry out water filling and air exhausting work to the instrument during the maintenance process, to eliminate the instrument problem caused by air in pipeline.

[0003] During system operation, if the instrument fails, the instrument needs to be isolated for maintenance, after the maintenance is completed, the internal medium of instrument pipeline is lost, and water filling and air exhausting need to be performed, but due to the high temperature and high pressure parameters of the system, the water filling and air exhausting work of the instrument is often difficult to perform, and is full of danger, and sometimes the unit needs to be shut down to meet the maintenance conditions of the instrument, which brings significant loss to the unit. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is that, in view of at least one defect of the related technology mentioned in the above background technology: air in the instrument pipeline can cause measurement fluctuation, and isolation maintenance is needed, an exhaust connection system and an exhaust device are provided.

[0005] The technical scheme adopted by the utility model to solve its technical problem is: an exhaust connection system is constructed, comprising:

[0006] A first joint is used to be connected with a first pipeline of an external instrument;

[0007] A second joint is used to be connected with a second pipeline of the external instrument;

[0008] A third joint is used to be connected with an external pressure pump group, and the external pressure pump group is used to transport liquid medium;

[0009] A first switch valve, a second switch valve, a third switch valve, a first pressure measuring element and a second pressure measuring element;

[0010] The third joint is connected with the first end of the third switch valve, the second end of the third switch valve is connected with the first ends of the first switch valve and the second switch valve, the second end of the first switch valve is connected with the first joint, and the second end of the second switch valve is connected with the second joint;

[0011] The second end of the third switch valve is connected with the first pressure measuring element on a pipeline connected with the first end of the first switch valve and the second switch valve;

[0012] The third joint is connected with the second pressure measuring element on a pipeline connected with the first end of the third switch valve.

[0013] In some embodiments, the exhaust connection system further comprises:

[0014] A check valve is provided on a pipeline connected with the second end of the third switch valve and the first end of the first switch valve and the second switch valve, and a conduction direction of the check valve is towards the first switch valve and the second switch valve.

[0015] In some embodiments, the exhaust connection system further comprises:

[0016] A safety valve is connected with the second end of the third switch valve on a pipeline connected with the first end of the first switch valve and the second switch valve.

[0017] In some embodiments, the exhaust connection system further comprises:

[0018] A fourth joint is connected with the first end of the safety valve on a pipeline connected with the second end of the third switch valve and the first end of the first switch valve and the second switch valve, and the second end of the safety valve is connected with the fourth joint, and the fourth joint is used for being connected with an external collection container.

[0019] In some embodiments, the exhaust connection system further comprises:

[0020] A fourth switch valve is connected with the second end of the third switch valve on a pipeline connected with the first end of the first switch valve and the second switch valve, and the second end of the fourth switch valve is connected with the fourth joint.

[0021] In some embodiments, the exhaust connection system further comprises:

[0022] A first three-way joint is used for connecting the second end of the third switch valve with the first end of the first switch valve and the second switch valve;

[0023] A second three-way joint is used for connecting the first pressure measuring element with the second end of the third switch valve and the first end of the first switch valve and the second switch valve; and

[0024] A third three-way joint is used for connecting the second pressure measuring element with the third joint and the first end of the third switch valve.

[0025] In some embodiments, the exhaust connection system further comprises:

[0026] a fourth tee joint, the safety valve is connected with the second end of the third switch valve and the first end of the first switch valve and the second switch valve through the fourth tee joint.

[0027] In some embodiments, the exhaust connection system further comprises:

[0028] a fifth tee joint, the first end of the fourth switch valve is connected with the second end of the third switch valve and the first end of the first switch valve and the second switch valve through the fifth tee joint; and,

[0029] a sixth tee joint, the second end of the fourth switch valve is connected with the second end of the safety valve and the external collection container through the sixth tee joint.

[0030] The utility model also constructs a kind of exhaust device, including the exhaust connection system and pressure pump group of any one described above.

[0031] In some embodiments, when the exhaust connection system includes the fourth joint, the exhaust device further includes a collection container, and the fourth joint is connected with the collection container.

[0032] By implementing the utility model, the following beneficial effects are achieved:

[0033] The exhaust connection system disclosed by the utility model can be applied to online fault maintenance of instruments in a high-temperature and high-pressure system, ensures the safety of the operation process, and ensures that the instrument pipeline can completely remove gas during online fault maintenance, thereby ensuring the accuracy of instrument measurement. BRIEF DESCRIPTION OF DRAWINGS

[0034] The utility model will be further described below in combination with the drawings and embodiments, and the drawings show:

[0035] Figure 1 A logic structure diagram of an embodiment of the exhaust connection system of the utility model is shown;

[0036] Figure 2 A logic structure diagram of an embodiment of the differential pressure transmitter of the utility model is shown. DETAILED DESCRIPTION

[0037] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific embodiments of the utility model will be described in detail with reference to the drawings.

[0038] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other in the case of no conflict.

[0039] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0040] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection", "provided", "located" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be chemically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0041] It should be noted here that the "connection" described below means physical structural connection through a connection pipeline, and the communication relationship and medium flow direction relationship are not uniquely limited. The connection pipeline provides a channel for the flow of liquid medium.

[0042] As shown in Figure 1 Some embodiments of the utility model disclose a kind of exhaust connection system 10, including first joint 101, second joint 102, third joint 103, first switch valve 104, second switch valve 105, third switch valve 106, first pressure measuring element 107 and second pressure measuring element 108, as follows specifically:

[0043] Third joint 103 is used to be connected with external pressure pump group, and external pressure pump group is used to transport liquid medium, for example, liquid medium is water, water here is only example, and is not limited to the present application, and can also be other.

[0044] The first connector 101 is used to connect to the first pipeline of an external instrument, and the second connector 102 is used to connect to the second pipeline of the external instrument, for filling and venting the first and second pipelines. For example, Figure 2 As shown, the first pipeline of the external instrument is the positive pressure side pipeline 201 of the differential pressure transmitter 20 in the external high-temperature and high-pressure system, and the second pipeline of the external instrument is the negative pressure side pipeline 204 of the differential pressure transmitter 20 in the external high-temperature and high-pressure system. The first connector 101 can be connected to the first drain plug 202 of the positive pressure side pipeline 201, and the second connector 102 can be connected to the second drain plug 205 of the negative pressure side pipeline 204. The first connector 101, the second connector 102, and the third connector 103 can be 1 / 4 NPT compression fittings, which can withstand a pressure of 25 MPa. The differential pressure transmitter 20 and the 1 / 4 NPT compression fittings mentioned here are only examples and are not intended to limit this application; other types are also possible.

[0045] The first switching valve 104, the second switching valve 105, and the third switching valve 106 are used to control the flow direction of the liquid medium, which can prevent the liquid medium from flowing back and leaking to the outside, causing damage. For example, the first switching valve 104, the second switching valve 105, and the third switching valve 106 are isolation valves. The isolation valve here is only an example and is not intended to limit this application. Other types are also possible.

[0046] The first pressure measuring element 107 is used to monitor the system back pressure, and the second pressure measuring element 108 is used to monitor the charging pressure. During operation, the charging pressure must be greater than the system back pressure to ensure that the liquid medium can be smoothly and continuously charged into the first and second pipelines of the external instrument, expelling air. If the charging pressure is less than the system back pressure, the power of the external pressure pump set does not meet the system requirements, and the pump set needs to be inspected or replaced with one that meets the charging pressure requirements. For example, the first pressure measuring element 107 and the second pressure measuring element 108 are pressure gauges capable of measuring 0–20 MPa. This is merely an example and not intended to limit the scope of this application; other pressure gauges may also be used.

[0047] The third connector 103 is connected to the first end of the third switching valve 106. The second end of the third switching valve 106 is connected to the first ends of the first switching valve 104 and the second switching valve 105. The second end of the first switching valve 104 is connected to the first connector 101, and the second end of the second switching valve 105 is connected to the second connector 102. A first pressure measuring element 107 is connected to the pipeline connecting the second end of the third switching valve 106 to the first ends of the first switching valve 104 and the second switching valve 105. A second pressure measuring element 108 is connected to the pipeline connecting the output end of the external pressure pump unit to the first end of the third switching valve 106.

[0048] The exhaust connection system 10 can be applied to online fault maintenance of the instrument in the high-temperature and high-pressure system, guaranteeing the safety of the operation process and ensuring that the instrument pipeline can completely exhaust gas during the online fault maintenance process, thereby guaranteeing the accuracy of the instrument measurement.

[0049] In some embodiments, as shown in Figure 1 The connection pipeline connecting the second end of the first switch valve 104 with the first joint 101 is a hose, and the connection pipeline connecting the second end of the second switch valve 105 with the second joint 102 is also a hose. The hose can be flexibly connected with any opening degree and high instrument installation structure, for example, the hose can withstand a pressure of 25 MPa. The other pipelines are hard pipes, which can withstand a pressure of 25 MPa at most.

[0050] In some embodiments, as shown in Figure 1 The exhaust connection system 10 further comprises a first three-way joint 109. The second end of the third switch valve 106 is connected with the first ends of the first switch valve 104 and the second switch valve 105 through the first three-way joint 109.

[0051] In some embodiments, as shown in Figure 1 The exhaust connection system 10 further comprises a check valve 110. The pipeline connecting the second end of the third switch valve 106 with the first ends of the first switch valve 104 and the second switch valve 105 is provided with the check valve 110. The conduction direction of the check valve 110 is toward the first switch valve 104 and the second switch valve 105. It should be noted that the direction of the check valve 110 refers to the flow direction of the medium, not the spatial position direction. Specifically, the pipeline connecting the second end of the third switch valve 106 with the first three-way joint is provided with the check valve 110, and the reverse pressure can reach 25 MPa.

[0052] Since the external pressure pump group is connected with the instrument in the external high-temperature and high-pressure system through the exhaust connection system 10, if the first switch valve 104, the second switch valve 105 and the third switch valve 106 cannot be closed in time when the external pressure pump group or the exhaust connection system 10 is abnormal, the medium in the high-temperature and high-pressure system will be directly leaked to the outside, which is extremely risky. Therefore, the check valve 110 can prevent the medium in the high-temperature and high-pressure system from leaking in time.

[0053] In some embodiments, as shown in Figure 1As shown, the exhaust connection system 10 further comprises a safety valve 111, the second end of the third switch valve 106 is connected with the pipeline in which the first ends of the first switch valve 104 and the second switch valve 105 are connected, and the safety valve 111 is connected with the pipeline, specifically, the second end of the third switch valve 106 is connected with the pipeline in which the check valve 110 is connected, and the safety valve 111 is connected with the pipeline, and the set pressure is 18 MPa. When the filling pressure is too large, the pressure in the exhaust connection system 10 will increase, so the excessive pressure will exist a risk to the system, and therefore the safety valve 111 is needed to be arranged to prevent the filling pressure from exceeding the pressure that the system can bear, and to cause a risk to the system.

[0054] In some embodiments, as shown in Figure 1 As shown, the exhaust connection system 10 further comprises a second tee joint 112, and the first pressure measuring element 107 is connected with the second end of the third switch valve 106 and the first ends of the first switch valve 104 and the second switch valve 105 through the second tee joint 112. Specifically, the first pressure measuring element 107 is connected with the check valve 110 and the first tee joint 109 through the second tee joint 112.

[0055] In some embodiments, as shown in Figure 1 As shown, the exhaust connection system 10 further comprises a third tee joint 113, and the second pressure measuring element 108 is connected with the third joint 103 and the first end of the third switch valve 106 through the third tee joint 113.

[0056] In some embodiments, as shown in Figure 1 As shown, the exhaust connection system 10 further comprises a fourth tee joint 114, and the safety valve 111 is connected with the second end of the third switch valve 106 and the first ends of the first switch valve 104 and the second switch valve 105 through the fourth tee joint 114, specifically, the safety valve 111 is connected with the second end of the third switch valve 106 and the check valve 110 through the fourth tee joint 114.

[0057] In some embodiments, as shown in Figure 1 As shown, the exhaust connection system 10 further comprises a fourth joint 115, the first end of the safety valve 111 is connected to the pipeline in which the second end of the third switch valve 106 and the first ends of the first switch valve 104 and the second switch valve 105 are connected, the second end of the safety valve 111 is connected to the fourth joint 115, and the fourth joint 115 is used to be connected with an external collection container, and the external collection container is used to collect the liquid medium sprayed through the pressure relief of the safety valve 111. For example, the fourth joint 115 can adopt a 1 / 4NPT sleeve pipe joint, and the 1 / 4NPT sleeve pipe joint here is only an example and does not limit the present application, and other joints can also be used.

[0058] In some embodiments, as shown in Figure 1As shown, the exhaust connection system 10 further comprises a fourth switch valve 116, a first end of the fourth switch valve 116 is connected to a pipeline in which a second end of the third switch valve 106 is connected to the first end of the first switch valve 104 and the second end of the second switch valve 105, specifically, the first end of the fourth switch valve 116 is connected to a pipeline in which the second end of the third switch valve 106 is connected to the check valve 110, and a second end of the fourth switch valve 116 is connected to the fourth joint 115. For example, the fourth switch valve 116 is an isolation valve, which is only an example and does not limit the present application, and can also be other.

[0059] In some embodiments, as shown in Figure 1 As shown, the exhaust connection system 10 further comprises a fifth three-way joint 117, the first end of the fourth switch valve 116 is connected to the second end of the third switch valve 106 and the first end of the first switch valve 104 and the second switch valve 105 through the fifth three-way joint 117, specifically, the first end of the fourth switch valve 116 is connected to the second end of the third switch valve 106 and the check valve 110 through the fifth three-way joint 117.

[0060] In some embodiments, as shown in Figure 1 As shown, the exhaust connection system 10 further comprises a sixth three-way joint 118, the second end of the fourth switch valve 116 is connected to the second end of the safety valve 111 and the external collection container through the sixth three-way joint 118.

[0061] As shown in Figure 1 and Figure 2 As shown above, the operation process of the exhaust connection system 10 is as follows:

[0062] 1. Connect the external pressure pump group through the third joint 103 and connect the external collection container through the fourth joint 115. First, under the chamber pressure, open the first switch valve 104, the second switch valve 105, the third switch valve 106 and the fourth switch valve 116, then open the external pressure pump group, input the liquid medium through the external pressure pump group, discharge the gas in the pipeline of the exhaust connection system 10, and finally close the external pressure pump group, the first switch valve 104, the second switch valve 105, the third switch valve 106 and the fourth switch valve 116.

[0063] 2. Connect the first blow-off plug 202 of the positive pressure side pipeline 201 of the external differential pressure transmitter 20 through the first joint 101, connect the second blow-off plug 205 of the negative pressure side pipeline 204 of the external differential pressure transmitter 20 through the second joint 102, open the first isolation valve 203 of the positive pressure side pipeline 201 of the external differential pressure transmitter 20, and then gradually open the first switch valve 104, and observe the system back pressure through the first pressure measuring element 107.

[0064] 3. Turn on the external pressure pump set, observe the charging pressure through the second pressure measuring element 108, and after confirming that the charging pressure is greater than the system back pressure, open the third switch valve 106. The external pressure pump set will charge the liquid medium into the positive pressure side pipeline 201 of the external differential pressure transmitter 20 to remove the air in the positive pressure side pipeline 201.

[0065] 4. After the air in the positive pressure side pipeline 201 of the external differential pressure transmitter 20 is completely removed, close the first isolation valve 203 of the positive pressure side pipeline 201 of the external differential pressure transmitter 20, close the first switch valve 104, open the second isolation valve 206 of the negative pressure side pipeline 204 of the external differential pressure transmitter 20, open the second switch valve 105, and the external pressure pump set will fill the negative pressure side pipeline 204 of the external differential pressure transmitter 20 with liquid medium to remove the air in the negative pressure side pipeline 204.

[0066] 5. After confirming that the water filling and air venting work of the positive pressure side pipeline 201 and the negative pressure side pipeline 204 in the external differential pressure transmitter 20 is completed, close the third switch valve 106, the external pressure pump group and the second switch valve 105.

[0067] 6. Close the second isolation valve 206 of the negative pressure side pipeline 204 in the external differential pressure transmitter 20, open the first switch valve 104 and the second switch valve 105 to balance the pressure on both sides of the positive pressure side pipeline 201 and the negative pressure side pipeline 204, slowly remove the first connector 101 and the second connector 102, and reseal the first drain plug 202 and the second drain plug 205, as well as remove the external pressure pump set and the external collection container. The water filling and air venting work of the pressure instrument of the high temperature and high pressure system is completed.

[0068] Some embodiments of this utility model also disclose an exhaust device, including a pressure pump assembly and the exhaust connection system 10 described in any of the above embodiments, which will not be repeated here.

[0069] In some embodiments, when the exhaust connection system 10 includes a fourth connector 115, the exhaust device also includes a collection container, to which the fourth connector 115 is connected.

[0070] By implementing this utility model, the following beneficial effects can be achieved:

[0071] The exhaust connection system disclosed in this utility model can be applied to online fault diagnosis of instruments in high temperature and high pressure systems, ensuring the safety of the operation process, and at the same time ensuring that the instrument pipeline can completely expel gas during online fault diagnosis, thus ensuring the accuracy of instrument measurement.

[0072] It can be understood that the above embodiments only express part of the embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, the above embodiments or technical features can be freely combined, and several modifications and improvements can be made, which belong to the protection scope of the present application, that is, the embodiments described in "in some embodiments" can be freely combined with any embodiment. Therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.

Claims

1. An exhaust connection system, characterized in that, Comprise: A first joint (101) for connecting with a first pipeline of an external instrument; A second joint (102) for connecting with a second pipeline of the external instrument; A third joint (103) for connecting with an external pressure pump group for delivering liquid medium; A first switch valve (104), a second switch valve (105), a third switch valve (106), a first pressure measuring element (107) and a second pressure measuring element (108); Wherein, the third joint (103) is connected with the first end of the third switch valve (106), the second end of the third switch valve (106) is connected with the first ends of the first switch valve (104) and the second switch valve (105), the second end of the first switch valve (104) is connected with the first joint (101), the second end of the second switch valve (105) is connected with the second joint (102); The first pressure measuring element (107) is connected on the pipeline where the second end of the third switch valve (106) is connected with the first ends of the first switch valve (104) and the second switch valve (105); The second pressure measuring element (108) is connected on the pipeline where the third joint (103) is connected with the first end of the third switch valve (106).

2. The exhaust connection system of claim 1, wherein, The exhaust connection system further comprises: A check valve (110) is arranged on the pipeline where the second end of the third switch valve (106) is connected with the first ends of the first switch valve (104) and the second switch valve (105), and the conduction direction of the check valve (110) is towards the first switch valve (104) and the second switch valve (105).

3. The exhaust connection system of claim 1, wherein, The exhaust connection system further comprises: A safety valve (111) is connected on the pipeline where the second end of the third switch valve (106) is connected with the first ends of the first switch valve (104) and the second switch valve (105).

4. The exhaust connection system of claim 3, wherein, The exhaust connection system further comprises: A fourth joint (115) is connected on the pipeline where the second end of the third switch valve (106) is connected with the first ends of the first switch valve (104) and the second switch valve (105), and the second end of the safety valve (111) is connected with the fourth joint (115), and the fourth joint (115) is used for connecting with an external collection container.

5. The exhaust connection system of claim 4, wherein, The exhaust connection system further comprises: A fourth switch valve (116) is connected on the pipeline where the second end of the third switch valve (106) is connected with the first ends of the first switch valve (104) and the second switch valve (105), and the second end of the fourth switch valve (116) is connected with the fourth joint (115).

6. The exhaust connection system of claim 1, wherein, The exhaust connection system further comprises: a first tee (109) through which the second end of the third switch valve (106) is connected to the first end of the first switch valve (104) and the second switch valve (105); a second tee (112) through which the first pressure measuring element (107) is connected to the second end of the third switch valve (106) and the first end of the first switch valve (104) and the second switch valve (105); and a third tee (113) through which the second pressure measuring element (108) is connected to the third port (103) and the first end of the third switch valve (106).

7. The exhaust connection system of claim 3, wherein, The exhaust connection system further comprises: a fourth tee (114) through which the safety valve (111) is connected to the second end of the third switch valve (106) and the first end of the first switch valve (104) and the second switch valve (105).

8. The exhaust connection system of claim 5, wherein, The exhaust connection system further comprises: a fifth tee (117) through which the first end of the fourth switch valve (116) is connected to the second end of the third switch valve (106) and the first end of the first switch valve (104) and the second switch valve (105); and a sixth tee (118) through which the second end of the fourth switch valve (116) is connected to the second end of the safety valve (111) and the external collection vessel.

9. An exhaust device characterized by comprising: A pressure pump group comprising the exhaust connection system according to any one of claims 1 to 8.

10. The exhaust apparatus according to claim 9, characterized by When the exhaust connection system comprises a fourth port (115), the exhaust device further comprises a collection vessel to which the fourth port (115) is connected. When the exhaust connection system comprises a fourth port (115), the exhaust device further comprises a collection vessel to which the fourth port (115) is connected.

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