Three-valve group

Abstract

The utility model relates to fluid conveying equipment, in particular to a three-valve group which comprises a main body, the main body is composed of a bottom runner plate parallel to a horizontal plane and a vertical runner plate perpendicular to the bottom runner plate, a balance valve is arranged at the top of the vertical runner plate, and a first stop valve and a second stop valve are arranged on the two sides of the vertical runner plate respectively. A first flow channel and a second flow channel are arranged in the vertical flow channel plate, a connecting block is further arranged on the connecting portion of the vertical flow channel plate and the bottom flow channel plate, and a straight flow channel is arranged in the connecting block. Due to the straight flow channel in the connecting plate, when fluid flows through the main body of the three-valve group, pressure loss caused by impacting an inner cavity of the flow channel is avoided, so that the result measured by the differential pressure transmitter is more accurate; and compared with a zigzag flow channel, the straight flow channel is simpler in processing technology and easier to process, so that the production cost can be reduced.

Description

Technical Field

[0001] The invention belongs to fluid conveying equipment, and in particular relates to a three-valve group. Background Art

[0002] Differential pressure transmitters are often used to measure flow and pressure difference on both sides of a fluid pipeline. If the differential pressure transmitter is directly connected to the fluid delivery pipeline, the diaphragm of the differential pressure transmitter is easily offset by the atmospheric pressure on both sides, further causing measurement errors. Therefore, when installing a differential pressure transmitter, it is usually necessary to use a three-valve group to connect to the pipeline.

[0003] The three-valve group is installed in conjunction with the differential pressure transmitter. When measurement is required, the air is discharged through the three-valve group to stabilize the pressure on both sides of the differential pressure transmitter, making the measurement result more stable.

[0004] There is currently a three-valve group consisting of a T-shaped structure as the main body. While this three-valve group plays a role in protecting the diaphragm, it can also improve the observation angle of the differential pressure transmitter, which can help users more easily observe the measurement data of the differential pressure transmitter.

[0005] However, due to the design of the T-shaped structure, it is inevitable to set up a tortuous flow channel to connect the three-valve group. When a fluid flows through a tortuous flow channel, the fluid cannot avoid hitting the inner cavity of the flow channel, further causing the problem of pressure loss, which makes the data measured by the differential pressure transmitter erroneous. In addition, the processing difficulty of the tortuous flow channel is relatively high, and the production cost is relatively high. Utility Model Content

[0006] In view of the above situation, the utility model provides a three-valve group, which is used to reduce the problem of fluid pressure loss in the valve flow channel, and also alleviates the problem of difficulty in flow channel processing caused by the structural limitations of the three-valve group.

[0007] The utility model provides the following technical solutions: a three-valve group, including a main body, a balancing valve, a first stop valve, a second stop valve and a mounting hole, the main body is composed of a bottom flow channel plate parallel to a horizontal plane and a vertical flow channel plate perpendicular to the bottom flow channel plate, the balancing valve is arranged on the top of the vertical flow channel plate, the first stop valve and the second stop valve are respectively arranged on both sides of the vertical flow channel plate, and the mounting hole is also arranged on the surface of the vertical flow channel plate, a first flow channel is arranged inside the vertical flow channel plate, the first flow channel connects the balancing valve and the first stop valve, a connecting plate is arranged at the connection between the bottom flow channel plate and the vertical flow channel plate, a direct flow channel is arranged inside the connecting plate, an inlet is also arranged at one end of the bottom of the bottom flow channel plate away from the vertical flow channel plate, and the direct flow channel connects the inlet and the first flow channel.

[0008] Furthermore, the second flow channel is also provided inside the vertical flow channel plate, and an outlet is also provided at one end of the bottom of the bottom flow channel plate close to the vertical flow channel plate, and the second flow channel is connected to the balancing valve, the second stop valve and the outlet.

[0009] Furthermore, a first interface and a second interface are symmetrically arranged on the surface of the vertical flow channel plate on which the mounting hole is arranged, wherein the first interface is communicated with the first flow channel, and the second interface is communicated with the second flow channel.

[0010] Furthermore, the connecting plate is a structural reinforcement plate.

[0011] In the utility model, a structural reinforcement plate is provided at the connection of the body, and a straight channel is further provided inside the structural reinforcement plate to obliquely connect the first flow channel inside the vertical flow channel plate and the inlet on the bottom flow channel plate. Compared with the tortuous flow channel, the straight flow channel will not change the flow direction of the fluid due to collision with the inner cavity of the flow channel during the flow process, which will further cause the problem of fluid pressure loss; at the same time, the straight flow channel is less difficult to process than the tortuous flow channel, which can well reduce the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the main body in the three-valve group.

[0013] Figure 2 It is a schematic diagram of the rear view structure of the main body in the three-valve group.

[0014] Figure 3 It is a schematic diagram of the structure of the main body of the three-valve group from an upward perspective.

[0015] Figure 4 for Figure 3 Cross-sectional view at AA in the middle.

[0016] Figure 5 It is a rear view structural diagram of the three-valve group.

[0017] Figure 6 It is a schematic diagram of the top view of the structure of the three-valve group body.

[0018] Figure 7 It is a side view structural diagram of the main body of the three-valve group.

[0019] Figure 8 for Figure 7 Cross-sectional view at BB in the middle.

[0020] Reference numerals:

[0021] 1. Balancing valve; 2. First stop valve; 3. Second stop valve; 4. Mounting hole; 5. Bottom flow channel plate; 6. Vertical flow channel plate; 7. Connecting plate; 8. Straight flow channel; 9. First flow channel; 10. Second flow channel; 11. Inlet; 12. Outlet; 13. First interface; 14. Second interface. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "connection" can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed" means that they are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present utility model, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model.

[0024] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0025] In the embodiment of the present invention, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0026] References to "one embodiment" or "some embodiments" etc. described in this specification mean that one or more embodiments of the utility model include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0027] Example:

[0028] Figure 5 The rear view of the three-valve group is shown. Figure 7 A side structural diagram of the three-valve group body is shown.

[0029] The main body is a T-shaped structure, which is composed of a bottom flow channel plate 5 parallel to the horizontal plane and a vertical flow channel plate 6 perpendicular to the bottom flow channel plate 5. The surface of the vertical flow channel plate 6 on the main body is provided with a mounting hole 4, a first interface 13 and a second interface 14, and the first interface 13 and the second interface 14 are symmetrically arranged. The mounting hole 4 is used to install the three-valve group main body on the mounting mechanism of the differential pressure transmitter, and when the mounting hole 4 is installed, the first interface 13 and the second interface 14 are fitted and connected with the positive and negative side interfaces of the diaphragm on the mounting mechanism of the differential pressure transmitter. When the three-valve group is put into use, the first interface 13 and the second interface 14 on the vertical flow channel plate 6 can make the fluid flow into the positive and negative side interfaces of the differential pressure transmitter diaphragm to complete the measurement of flow rate, pressure difference, etc. The T-shaped structure of the three-valve group main body can raise the differential pressure transmitter to a height convenient for the user to observe with the help of the vertical flow channel plate 6 while connecting the differential pressure transmitter.

[0030] Figure 1 The three-dimensional structure diagram of the three-valve group body is shown. Figure 2 The rear view of the three-valve group main body is shown. Figure 3 The bottom view of the three-valve group main body is shown. Figure 8 A first flow channel 9 and a second flow channel 10 are shown.

[0031] A balancing valve 1 is installed on the top of the vertical flow channel plate 6, and a first stop valve 2 and a second stop valve 3 are installed on both sides of the vertical flow channel plate 6. A first flow channel 9 and a second flow channel 10 are also arranged inside the vertical flow channel plate 6, and an inlet 11 and an outlet 12 are also arranged on the bottom flow channel plate 5. The inlet 11 is arranged at one end of the bottom flow channel plate 5 away from the vertical flow channel plate 6, so that the fluid conveying pipeline can convey the fluid into the main body of the three-valve group through the inlet 11 when conveying the fluid; the outlet 12 is arranged at one end of the bottom of the bottom flow channel plate 5 close to the vertical flow channel plate 6, so that the fluid flowing through the diaphragm can quickly flow out of the main body of the three-valve group, and avoid the fluid from accumulating in the main body of the three-valve group due to slow flow rate. The first flow channel 9 connects the balancing valve 1 and the first stop valve 2, and the second flow channel 10 connects the balancing valve 1 and the second stop valve 3. When the balancing valve 1 is in the open state, the first flow channel 9 and the second flow channel 10 are in a connected state, and the connected state can prevent the two sides of the differential pressure transmitter diaphragm from being offset due to atmospheric pressure and causing measurement errors. Specifically, when the first stop valve 2 is slowly opened, the fluid enters the main body cavity of the three-valve group through the inlet 11, and further enters the inside of the differential pressure transmitter through the first flow channel 9. When the fluid fills both sides of the differential pressure transmitter diaphragm, it further fills the inner side of the main body of the three-valve group, and the air is discharged through the balance valve through the second flow channel 10 through the outlet. When the flow of the fluid tends to be calm, the pressure on both sides of the differential pressure transmitter diaphragm is in a balanced state, and the atmospheric pressure will not cause the diaphragm to deviate, further avoiding the situation where the differential pressure transmitter generates errors due to atmospheric pressure. When the balancing valve 1 is in a closed state, the first flow channel 9 and the second flow channel 10 are in a cut-off state, and the flow rate and pressure difference on both sides of the diaphragm can be measured by the differential pressure transmitter in the cut-off state. Specifically, after completing the operation in the open state of the balancing valve 1, close the balancing valve 1, slowly open the second stop valve 3, first discharge the waste fluid of the balanced pressure, and after the fluid flowing through the diaphragm tends to be stable, the data to be measured can be obtained from the differential pressure transmitter.

[0032] Advantageously, the outlet 12 is arranged perpendicular to the horizontal plane, ensuring that the fluid passing through the second flow channel 10 can be accelerated to flow out of the main body of the three-valve group by gravity, further preventing the accumulation of the fluid.

[0033] Figure 4 A direct current channel 8 is shown, Figure 6 The arrangement of the connecting plate 7 is shown. Figure 3 The direction of the inlet 11 is shown. A connecting plate 7 is provided at the connection between the bottom flow channel plate 5 and the vertical flow channel plate 6, and a direct flow channel 8 is provided inside the connecting plate 7. The direct flow channel 8 connects the first flow channel 9 inside the vertical flow channel plate 6 and the inlet 11 on the bottom flow channel plate 5, further forming an integrated three-valve group with a direct flow channel 8.

[0034] Advantageously, the straight flow channel 8 is connected to the first flow channel 9 and the flow inlet 11 at an inclined angle, and the angle of inclination allows the fluid to pass through the straight flow channel 8 without consuming additional force.

[0035] Advantageously, one end of the inlet 11 is tilted along the direction of the direct current channel 8 , and the tilt angle is designed to be consistent with the tilt angle of the direct current channel 8 , ensuring that the fluid can flow into the direct current channel 8 through the inlet 11 without consuming additional force.

[0036] Advantageously, the cross section of the direct current channel 8 can be any closed shape, and advantageously, the cross section of the direct current channel 8 is circular. In terms of processing technology, the direct current channel 8 with a circular cross section is easier to produce, further reducing production costs.

[0037] The three-valve group has a working process, the process is as follows:

[0038] Check whether the three-valve group is in a closed state; install the inlet 11 and outlet 12 of the three-valve group to the fluid delivery pipeline, first open the balance valve 1, then slowly open the first stop valve 2, wait for the fluid to discharge the air on both sides of the diaphragm in the differential pressure transmitter, and after the fluid tends to be stable, close the balance valve 1, and then slowly open the second stop valve 3, wait for the waste fluid to be discharged through the second stop valve 3, and when the subsequent fluid flowing through the diaphragm of the differential pressure transmitter can flow out stably, the required data can be obtained through the differential pressure transmitter. Among them, the direct current channel 8 set inside the main body can avoid the additional collision of the fluid with the inner cavity of the flow channel when the fluid flows through the main body of the three-valve group, reduce the pressure loss of the fluid, and further ensure that the data error measured by the differential pressure transmitter is reduced.

[0039] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited to them. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model; the embodiments of the utility model and the features in the embodiments can be combined with each other in the absence of conflicts. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A three-valve group, comprising a main body, a balancing valve (1), a first stop valve (2), a second stop valve (3) and a mounting hole (4), wherein the main body is composed of a bottom flow channel plate (5) parallel to a horizontal plane and a vertical flow channel plate (6) perpendicular to the bottom flow channel plate (5), the balancing valve (1) is arranged on the top of the vertical flow channel plate (6), the first stop valve (2) and the second stop valve (3) are respectively arranged on both sides of the vertical flow channel plate (6), and the mounting hole (4) is also arranged on the surface of the vertical flow channel plate (6), characterized in that: A first flow channel (9) is arranged inside the vertical flow channel plate (6), and the first flow channel (9) is connected to the balancing valve (1) and the first stop valve (2). A connecting plate (7) is arranged at the connection between the bottom flow channel plate (5) and the vertical flow channel plate (6), and a straight flow channel (8) is arranged inside the connecting plate (7). An inlet (11) is also arranged at one end of the bottom of the bottom flow channel plate (5) away from the vertical flow channel plate (6), and the straight flow channel (8) is connected to the inlet (11) and the first flow channel (9).

2. The three-valve group according to claim 1, characterized in that: A second flow channel (10) is also provided inside the vertical flow channel plate (6), and an outlet (12) is also provided at one end of the bottom of the bottom flow channel plate (5) close to the vertical flow channel plate (6), and the second flow channel (10) is connected to the balancing valve (1), the second stop valve (3) and the outlet (12).

3. The three-valve group according to claim 2, characterized in that: A first interface (13) and a second interface (14) are symmetrically arranged on the surface of the vertical flow channel plate (6) on which the mounting hole (4) is arranged, wherein the first interface (13) is connected to the first flow channel (9), and the second interface (14) is connected to the second flow channel (10).

4. The three-valve group according to claim 1, characterized in that: The connecting plate (7) is a structural reinforcement plate.

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