Tank car stop valve

Abstract

The utility model discloses a tank car stop valve which comprises a first valve body, a second valve body, a valve cover, a limiting plate, a valve rod and an elastic piece, and a first channel used for being communicated with a tank car pipeline and a second channel used for being communicated with a gasification pipeline are arranged on the two sides of the lower portion of the first valve body respectively. The lower portion of the first valve body is provided with a third channel communicated with the first channel and the second channel, and the middle of the first valve body is fixedly connected with a first sealing piece. According to the tank car stop valve, the pressure of the tank car can be monitored in real time, and when the pressure of the tank car reaches a certain threshold value, the limiting plate can be subjected to the pressure effect in the first cavity, overcome the elastic force effect of the elastic piece and then drive the valve rod to move to the third channel, so that a supply pipeline from a storage tank to the tank car is cut off; excessive flat pressing is avoided, self-protection of the pressure of the tank car is achieved, and therefore the situation that the safety valve leaks pressure due to overpressure is prevented, potential safety hazards are eradicated, and loss emission is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of tanker pressurization, and particularly relates to a tanker cut-off valve. Background Art

[0002] At present, on the tankers used for transporting LNG in the LNG industry, the built-in pressure gauge detection system may show abnormal display or the pointer of the pressure gauge does not change with the actual pressure due to the quality problems of the pressure gauges on individual tankers.

[0003] For the storage tanks at stations with small gas filling volume, the pressure may reach above 0.7 MPa, and the pressure of the tanker may reach above 0.65 MPa. That is, when equalizing the pressure between the tanker and the storage tank, if the unloading operator at the station fails to timely detect the change of the tanker pressure gauge, it is very easy to over-pressurize the tanker due to this fault, resulting in an accident of the tanker's safety valve popping to relieve pressure.

[0004] In addition, for the storage tanks at stations with large gas filling volume, the pressure is generally not greater than 0.45 MPa. At this time, after the tanker arrives at the station, there is no need to equalize the pressure between the tanker and the storage tank, but directly use the booster vaporizer at the station to pressurize the tanker. However, if the unloading operator at the station fails to timely detect the change of the tanker pressure gauge, it is also easy to over-pressurize the tanker due to this fault, resulting in an accident of the tanker's safety valve popping to relieve pressure. Content of the Utility Model

[0005] The utility model provides a tanker cut-off valve to overcome the defects of the prior art, which can avoid over-pressurization.

[0006] The purpose of the utility model is realized through the following technical solutions:

[0007] A tanker cut-off valve, comprising:

[0008] A first valve body, on both sides of the lower part of the first valve body, there are respectively arranged a first channel for connecting the tanker pipeline and a second channel for connecting the vaporization pipeline. A third channel connecting the first channel and the second channel is arranged at the lower part of the first valve body, and a first sealing member is fixedly connected to the middle part of the first valve body;

[0009] A second valve body, the second valve body is fixedly connected to the upper end of the first valve body. A regulating stud is threadedly connected to the lower part of the second valve body, and a first mounting hole is arranged at the upper part of the regulating stud;

[0010] A valve cover, the valve cover is fixedly connected to the upper end of the second valve body, and a first cavity for connecting the vaporization pipeline is arranged inside the valve cover;

[0011] The limiting plate, the upper part of the limiting plate passes through the upper part of the second valve body and extends into the first cavity, the middle part of the limiting plate is slidably connected in the second valve body, a second seal is arranged between the limiting plate and the second valve body, and a second mounting hole is arranged at the lower part of the limiting plate;

[0012] The valve stem, one end of the valve stem is fixedly connected to the limiting plate, and the other end of the valve stem passes through the adjusting stud and the first seal in sequence and then blocks the third channel;

[0013] The elastic member, the elastic member is sleeved on the valve stem, and both ends of the elastic member are respectively located in the first mounting hole and the second mounting hole;

[0014] Wherein, the axial direction of the third channel, the axial direction of the adjusting stud, the sliding direction of the limiting plate and the axial direction of the valve stem all coincide.

[0015] The beneficial effects of adopting the above technical solutions are as follows: The tank truck cut-off valve can monitor the pressure of the tank truck in real time, and when the pressure of the tank truck reaches a certain threshold, the limiting plate will be affected by the pressure in the first cavity and drive the valve stem to move to the third channel after overcoming the elastic force of the elastic member, so as to cut off the supply pipeline from the storage tank to the tank truck, avoid excessive pressure equalization and realize self-protection of the tank truck pressure, thereby preventing the situation of overpressure and tripping the safety valve to relieve pressure, and further eliminating potential safety hazards and reducing loss emissions; In addition, when the tank truck is discharging liquid normally, the pressure of the tank truck is relatively low, the limiting plate will be affected by the elastic force of the elastic member and drive the valve stem to move out of the third channel after overcoming the pressure in the first cavity, so that the tank truck can operate normally with increased pressure, thereby automatically increasing the pressure of the running tank truck.

[0016] In one embodiment, a first pipe body communicating with the first channel and a second pipe body communicating with the second channel are respectively arranged on both sides of the first valve body.

[0017] The beneficial effects of adopting the above technical solutions are as follows: The first channel is connected to the tank truck pipeline through the first pipe body, and the second channel is connected to the gasification pipeline through the second pipe body.

[0018] In one embodiment, a third pipe body is connected between the first pipe bodies, and both ends of the third pipe body are respectively communicated with the first cavity and the first pipe body.

[0019] The beneficial effects of adopting the above technical solutions are as follows: The first cavity is communicated with the first pipe body through the third pipe body.

[0020] In one embodiment, pipe joints are respectively connected to the third pipe body, and the two pipe joints are respectively connected to both ends of the third pipe body.

[0021] The beneficial effects of adopting the above technical solutions are as follows: Such a setting is convenient for installing or replacing the third pipe body.

[0022] In one embodiment, a first flange and a second flange are respectively connected to the ends of the first pipe body and the second pipe body away from the first valve body.

[0023] The beneficial effects of adopting the above technical solution are as follows: By setting it in this way, it is convenient to use the first flange and the second flange to connect with the tank truck pipeline and the gasification pipeline respectively.

[0024] In one embodiment, the first seal includes a sealing sleeve sleeved on the valve stem. The inner side and the outer side of the first seal respectively abut against the valve stem and the inner wall of the first valve body, and the upper part of the first seal is connected to the first valve body by screws.

[0025] The beneficial effects of adopting the above technical solution are as follows: The first seal plays a sealing role between the valve stem and the first valve body to prevent the fluid in the third channel from leaking; in addition, the first seal is fixedly connected to the first valve body by screw connection to improve the sealing reliability of the first seal.

[0026] In one embodiment, the outer side of the second valve body is bolted to the outer side of the first valve body.

[0027] In one embodiment, a threaded hole for threadedly connecting an adjusting stud is provided at the lower part of the second valve body, and the axial direction of the threaded hole coincides with the axial direction of the third channel.

[0028] The beneficial effects of adopting the above technical solution are as follows: By setting it in this way, it is ensured that the adjusting direction of the adjusting stud coincides with the axial direction of the third channel, so as to facilitate the valve stem to move into or out of the third channel.

[0029] In one embodiment, a second cavity for slidably connecting a limiting plate is provided at the lower part of the valve cover, and the axial direction of the second cavity coincides with the axial direction of the third channel.

[0030] The beneficial effects of adopting the above technical solution are as follows: By setting it in this way, it is ensured that the sliding direction of the limiting plate coincides with the axial direction of the third channel, so as to facilitate the valve stem to move into or out of the third channel.

[0031] In one embodiment, a vent hole for communicating with the second cavity is provided on the second valve body.

[0032] The beneficial effects of adopting the above technical solution are as follows: The vent hole can communicate the second cavity with the atmosphere to prevent the movement of the limiting plate from being affected due to the formation of pressure in the second cavity.

[0033] The beneficial effects of the present utility model are as follows:

[0034] The tank truck cut-off valve can monitor the pressure of the tank truck in real time. When the pressure of the tank truck reaches a certain threshold, the limiting plate will be affected by the pressure in the first cavity and overcome the elastic force of the elastic part, and then drive the valve stem to move to the third channel to cut off the supply pipeline from the storage tank to the tank truck, so as to avoid excessive pressure equalization and realize self-protection of the tank truck pressure, thus preventing the situation of overpressure causing the safety valve to relieve pressure, and further eliminating potential safety hazards and reducing loss emissions. In addition, when the tank truck is discharging liquid normally, the pressure of the tank truck is relatively low. The limiting plate will be affected by the elastic force of the elastic part and overcome the pressure in the first cavity, and then drive the valve stem to move out of the third channel, so that the tank truck can operate normally under increased pressure, thereby automatically increasing the pressure of the running tank truck. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In the following, the present utility model will be described in more detail based on embodiments with reference to the drawings.

[0036] Wherein:

[0037] Figure 1 shows a schematic structural diagram of an embodiment of the present utility model;

[0038] In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn to actual scale.

[0039] Reference numerals:

[0040] 1 - First valve body, 101 - First channel, 102 - Second channel, 103 - Third channel, 2 - First pipe body, 3 - First flange, 4 - Third pipe body, 5 - Pipe joint, 6 - Valve cover, 601 - First cavity, 602 - Second cavity, 7 - Limiting plate, 701 - Second mounting hole, 8 - Second seal, 9 - Elastic part, 10 - Adjusting stud, 1001 - First mounting hole, 11 - Valve stem, 12 - Second flange, 13 - Second pipe body, 14 - First seal, 15 - Second valve body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The present utility model will be further described below with reference to the drawings.

[0042] The present utility model provides a tank truck cut-off valve, as Figure 1 shown, which includes:

[0043] A first valve body 1, on both sides of the lower part of the first valve body 1, there are respectively arranged a first channel 101 for connecting the tank truck pipeline and a second channel 102 for connecting the gasification pipeline. At the lower part of the first valve body 1, there is a third channel 103 connecting the first channel 101 and the second channel 102. In the middle part of the first valve body 1, a first seal 14 is fixedly connected;

[0044] The second valve body 15 is fixedly connected to the upper end of the first valve body 1. A regulating stud 10 is threadedly connected to the lower part of the second valve body 15, and a first mounting hole 1001 is provided in the upper part of the regulating stud 10;

[0045] The valve cover 6 is threadedly connected to the upper part of the second valve body 15 at the lower part thereof. A first cavity 601 for communicating with the gasification pipeline is provided inside the valve cover 6;

[0046] The limiting plate 7 has its upper part passing through the upper part of the second valve body 15 and extending into the first cavity. The middle part of the limiting plate 7 is slidably connected inside the second valve body 15. A second sealing member 8 is provided between the limiting plate 7 and the second valve body 15, and a second mounting hole 701 is provided in the lower part of the limiting plate 7;

[0047] The valve stem 11 has one end threadedly connected to the limiting plate 7, and the other end of the valve stem 11 sequentially passes through the regulating stud 10 and the first sealing member 14 and then plugs the third channel 103;

[0048] The elastic member 9 is sleeved on the valve stem 11, and both ends of the elastic member 9 are respectively located in the first mounting hole 1001 and the second mounting hole 701;

[0049] Wherein, the axial direction of the third channel 103, the axial direction of the regulating stud 10, the sliding direction of the limiting plate 7, and the axial direction of the valve stem 11 all coincide.

[0050] It can be understood that the tank truck cut-off valve can monitor the pressure of the tank truck in real time. And when the pressure of the tank truck reaches a certain threshold value, the limiting plate 7 will be affected by the pressure in the first cavity 601 and overcome the elastic force of the elastic member 9 and then drive the valve stem 11 to move to the third channel 103 to automatically cut off the supply pipeline from the storage tank to the tank truck, so as to avoid excessive pressure equalization and realize self-protection of the tank truck pressure, thereby preventing the situation of overpressure tripping of the safety valve to relieve pressure, and further eliminating potential safety hazards and reducing loss emissions; in addition, when the tank truck is discharging liquid normally, the pressure of the tank truck is relatively low, and the limiting plate 7 will be affected by the elastic force of the elastic member 9 and overcome the pressure in the first cavity 601 and then drive the valve stem 11 to move out of the third channel 103, so that the tank truck can be pressurized normally, thereby automatically pressurizing the running tank truck; at the same time, this tank truck cut-off valve changes the manual protection to mechanical protection to realize orderly pressurization and reduce potential safety hazards.

[0051] It can be understood that by turning the regulating stud 10, the compression amount of the elastic member 9 can be adjusted, thereby adjusting the threshold value, and further being able to perform the closing function under other working condition pressures; in addition, the second sealing member 8 is an O-ring, and the elastic member 9 can be a spring.

[0052] In one embodiment, a first pipe body 2 communicating with the first channel 101 and a second pipe body 13 communicating with the second channel 102 are respectively arranged on two sides of the first valve body 1; the first channel 101 communicates with a tank truck pipeline through the first pipe body 2, and the second channel 102 communicates with a gasification pipeline through the second pipe body 13.

[0053] In one embodiment, a third pipe body 4 is connected between the first pipe bodies 2, and two ends of the third pipe body 4 communicate with the first cavity 601 and the first pipe body 2 respectively; the first cavity 601 communicates with the first pipe body 2 through the third pipe body 4; the third pipe body 4 is a flexible pipe.

[0054] In one embodiment, pipe connectors 5 are respectively connected to the third pipe body 4, and the two pipe connectors 5 are respectively connected to two ends of the third pipe body 4 to facilitate the installation or replacement of the third pipe body 4.

[0055] In one embodiment, a first flange 3 and a second flange 12 are respectively connected to one ends of the first pipe body 2 and the second pipe body 13 far away from the first valve body 1 to facilitate the connection with the tank truck pipeline and the gasification pipeline by using the first flange 3 and the second flange 12 respectively.

[0056] In one embodiment, the first seal 14 includes a sealing sleeve sleeved on the valve stem 11. The inner side and the outer side of the first seal 14 respectively abut against the valve stem 11 and the inner wall of the first valve body 1, and the upper part of the first seal 14 is connected to the first valve body 1 by screws.

[0057] It can be understood that the first seal 14 plays a sealing role between the valve stem 11 and the first valve body 1 to prevent the fluid in the third channel 103 from leaking; in addition, the first seal 14 is fixedly connected to the first valve body 1 by screw connection to improve the sealing reliability of the first seal 14.

[0058] It should be noted that a plurality of O-ring seals are also arranged on the inner side and the outer side of the sealing sleeve to improve the sealing performance.

[0059] In one embodiment, the outer side of the second valve body 15 is bolted to the outer side of the first valve body 1.

[0060] In one embodiment, a threaded hole for threadedly connecting the adjusting stud 10 is arranged at the lower part of the second valve body 15, and the axial direction of the threaded hole coincides with the axial direction of the third channel 103 to ensure that the adjusting direction of the adjusting stud 10 coincides with the axial direction of the third channel 103, so as to facilitate the movement of the valve stem 11 into or out of the third channel 103.

[0061] In one embodiment, a second cavity 602 for slidably connecting a limit plate 7 is provided at the lower part of the valve cover 6. The axial direction of the second cavity 602 coincides with the axial direction of the third channel 103 to ensure that the sliding direction of the limit plate 7 coincides with the axial direction of the third channel 103, thereby facilitating the movement of the valve stem 11 into or out of the third channel 103.

[0062] In one embodiment, a vent hole for communicating with the second cavity 602 is provided on the second valve body 15.

[0063] It can be understood that the vent hole can communicate the second cavity 602 with the atmosphere to prevent the influence on the movement of the limit plate 7 due to the pressure buildup in the second cavity 602.

[0064] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, 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. Therefore, it should not be construed as a limitation to the present invention.

[0065] Although the present invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed, as long as they do not deviate from the spirit and scope of the present invention defined by the appended claims. It should be understood that the different dependent claims and the features described herein can be combined in a manner different from that described in the original claims. It should also be understood that the features described in connection with a single embodiment can be used in other described embodiments.

Claims

1. A tank truck cut-off valve, characterized in that Comprising: A first valve body (1), on both sides of the lower part of the first valve body (1), there are respectively arranged a first channel (101) for connecting the pipeline of the tank car and a second channel (102) for connecting the gasification pipeline. In the lower part of the first valve body (1), there is a third channel (103) connecting the first channel (101) and the second channel (102). In the middle part of the first valve body (1), a first seal (14) is fixedly connected. A second valve body (15), the second valve body (15) is fixedly connected to the upper end of the first valve body (1). A regulating stud (10) is threadedly connected to the lower part of the second valve body (15). There is a first mounting hole (1001) in the upper part of the regulating stud (10). A valve cover (6), the valve cover (6) is fixedly connected to the upper end of the second valve body (15). Inside the valve cover (6), there is a first cavity (601) for connecting the gasification pipeline. A limiting plate (7), the upper part of the limiting plate (7) passes through the upper part of the second valve body (15) and extends into the first cavity. The middle part of the limiting plate (7) is slidably connected inside the second valve body (15). A second seal (8) is arranged between the limiting plate (7) and the second valve body (15). There is a second mounting hole (701) in the lower part of the limiting plate (7). A valve stem (11), one end of the valve stem (11) is fixedly connected to the limiting plate (7), and the other end of the valve stem (11) sequentially passes through the regulating stud (10) and the first seal (14) and then blocks the third channel (103). An elastic member (9), the elastic member (9) is sleeved on the valve stem (11), and both ends of the elastic member (9) are respectively located in the first mounting hole (1001) and the second mounting hole (701). Wherein, the axial direction of the third channel (103), the axial direction of the regulating stud (10), the sliding direction of the limiting plate (7), and the axial direction of the valve stem (11) all coincide.

2. The shut-off valve for a tank truck according to claim 1, characterized in that, On both sides of the first valve body (1), there are respectively arranged a first pipe body (2) communicating with the first channel (101) and a second pipe body (13) communicating with the second channel (102).

3. The cut-off valve for a tank truck according to claim 2, characterized in that, A third pipe body (4) is connected between the valve cover (6) and the first pipe body (2), and both ends of the third pipe body (4) respectively communicate with the first cavity (601) and the first pipe body (2).

4. The cut-off valve for a tank truck according to claim 3, characterized in that, Pipe connectors (5) are connected to both the valve cover (6) and the third pipe body (4), and the two pipe connectors (5) are respectively connected to both ends of the third pipe body (4).

5. The cut-off valve for a tank truck according to claim 2, characterized in that, One ends of the first pipe body (2) and the second pipe body (13) far from the first valve body (1) are respectively connected with a first flange (3) and a second flange (12).

6. The cut-off valve for a tank truck according to claim 1, characterized in that, The first seal (14) includes a sealing sleeve sleeved on the valve stem (11), the inner side and the outer side of the first seal (14) respectively abut against the valve stem (11) and the inner wall of the first valve body (1), and the upper part of the first seal (14) is screwed to the first valve body (1).

7. The cut-off valve for a tank truck according to claim 1, characterized in that, The outer side of the second valve body (15) is bolted to the outer side of the first valve body (1).

8. The cut-off valve for a tank truck according to claim 1, characterized in that, A threaded hole for threadedly connecting the adjusting stud (10) is provided in the lower part of the second valve body (15), and the axial direction of the threaded hole coincides with the axial direction of the third channel (103).

9. The cut-off valve for a tank truck according to claim 1, characterized in that, A second cavity (602) for slidably connecting the limiting plate (7) is provided in the lower part of the valve cover (6), and the axial direction of the second cavity (602) coincides with the axial direction of the third channel (103).

10. The tanker cut-off valve according to claim 9, wherein, A vent hole for communicating the second cavity (602) is provided on the second valve body (15).

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