Guard for triple valve block switch

Abstract

This utility model discloses a protective device for a three-valve manifold switch, including a housing for fitting over the three-valve manifold; the top plate of the housing has a second through hole for accommodating the connection part of a differential pressure transmitter; the bottom plate of the housing has a first through hole for accommodating a pipe connected to the three-valve manifold; it also includes a cover plate, which is an L-shaped plate, the first plate of which is used to block an opening on one side plate of the housing, and the second plate of which is inserted into a slot in the top plate or the other side plate; this utility model fits the housing over the three-valve manifold, designs through holes for connecting to the differential pressure transmitter and the pipe respectively, and finally seals the housing with an L-shaped plate, which can enclose the switches of the three-valve manifold inside the housing, preventing unauthorized operation of the switches, improving the safety of the three-valve manifold, and ensuring the normal operation of the system.

Description

Technical Field

[0001] This utility model belongs to the field of three-valve group control technology, and in particular relates to a protective device for three-valve group switches. Background Technology

[0002] Three-valve manifolds are valve assemblies commonly used in differential pressure measurement systems. They are primarily used in conjunction with differential pressure transmitters to control fluid pressure and achieve system balance. A three-valve manifold consists of two shut-off valves and one balancing valve. The two shut-off valves are connected to the high-pressure side and the low-pressure side, respectively, while the balancing valve is used to balance the pressure in the positive and negative pressure chambers.

[0003] Three-valve manifolds are typically connected to pipelines, so some manifolds may be exposed within the plant area. In certain situations, this can pose a risk of improper operation or tampering with the manifold settings. Such improper operation can lead to inaccurate flow meter readings, thereby affecting the normal operation of the system or causing safety issues. Utility Model Content

[0004] The purpose of this invention is to provide a protective device for a three-valve manifold switch to prevent the valves of the three-valve manifold from being operated improperly and to ensure the normal operation of the monitoring system.

[0005] The present invention adopts the following technical solution: a protective device for a three-valve group switch, including a housing for fitting around the outside of the three-valve group; The top plate of the housing has a second through hole for accommodating the connection part of the differential pressure transmitter; The bottom plate of the enclosure has a first through hole for accommodating the pipe connected to the three-valve manifold; It also includes a cover plate, which is an L-shaped plate. The first plate of the L-shaped plate is used to block the opening on one side plate of the enclosure, and the second plate of the L-shaped plate is inserted into a slot in the top plate or another side plate.

[0006] The beneficial effects of this utility model are as follows: This utility model fits the housing outside the three-valve group, and then designs through holes for connecting to the differential pressure transmitter and pipeline respectively. Finally, the housing is sealed by an L-shaped plate. This can enclose all the switches of the three-valve group inside the housing, which can prevent unauthorized operation of the switches, improve the safety of the three-valve group, and ensure the normal operation of the system. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the protective device for the valve group switch in Embodiment 3 of this utility model; Figure 2 This is a structural schematic diagram of the protective device for the valve group switch in Embodiment 3 of this utility model from another perspective; Figure 3 This is a schematic diagram of the structure of the box in an embodiment of this utility model; Figure 4This is a structural schematic diagram of the box body from another perspective in an embodiment of this utility model; Figure 5 This is a schematic diagram of another embodiment of the present invention; Figure 6 This is a structural schematic diagram from another perspective of another embodiment of the present invention.

[0008] Wherein: 10. Box body; 20. First through hole; 30. Second through hole; 40. Cover plate; 11. Locking ring; 12. Lead seal post; 13. Top plate; 14. Slot; A. Lead seal through hole. Detailed Implementation

[0009] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0010] This utility model discloses a protective device for a three-valve manifold switch, such as... Figure 1 and Figure 2 As shown, the enclosure includes a housing 10 for fitting over the three-valve manifold; the top plate 13 of the housing 10 has a second through hole 30 for accommodating a differential pressure transmitter connection; the bottom plate of the housing 10 has a first through hole 20 for accommodating a pipe connected to the three-valve manifold; and a cover plate 40, which is an L-shaped plate, the first plate of which is used to block an opening on one side plate of the housing 10, and the second plate of which is inserted into a slot in the top plate 13 or the other side plate.

[0011] This invention involves placing a housing over the three-valve manifold, designing through holes for connection to the differential pressure transmitter and pipelines, and finally sealing the housing with an L-shaped plate. This encloses all the switches of the three-valve manifold within the housing, preventing unauthorized operation of the switches, improving the safety of the three-valve manifold, and ensuring the normal operation of the system.

[0012] In one embodiment, such as Figure 3 and Figure 4 As shown, the housing 10 is also provided with a locking ring 11, and the first plate is provided with a through hole for the locking ring 11 to pass through; it also includes a lock, which is used to cooperate with the locking ring 11 to realize the locking and unlocking of the L-shaped plate.

[0013] More specifically, the housing 10 is also provided with a lead seal post 12, and the first plate is provided with a through hole for the lead seal post 12 to pass through. The outer end of the lead seal post 12 has a lead seal through hole A; it also includes a lead seal, which is used to install on the lead seal through hole A.

[0014] like Figure 3As shown, the first through hole 20 is a strip-shaped hole extending from the center of the bottom plate to its edge. The second through hole 30 extends from the center of the top plate to its edge. This design facilitates the installation of the housing 10. For example, during installation, the opening of the first through hole 20 is aligned with the pressure pipe, and the opening of the second through hole 30 is aligned with the bottom of the differential pressure transmitter. Then, the housing 10 is moved horizontally. When the open end moves from one end of the differential pressure transmitter to the other end, the cover plate 40 is installed on the housing 10 to seal it.

[0015] At this point, the entire enclosure will be completely enclosed by the three-valve manifold, which is equivalent to the enclosure 10 being "hung" on the three-valve manifold. Since the first through hole 20 is completely filled by the pipeline and the second through hole 30 is completely filled by the connection part of the differential pressure transmitter, the interior and exterior of the enclosure 10 are separated into two spaces, making it difficult for non-staff members to operate the valves of the three-valve manifold.

[0016] In another embodiment of the present invention, the extension direction of the first through hole 20 and the second through hole 30 is different from that in the above embodiment. If the extension direction of the through hole in the above embodiment is described as longitudinal, the extension direction of the through hole in this embodiment is transverse.

[0017] like Figure 5 and Figure 6 As shown, the longitudinal side plate of the housing 10 has an opening, and two through holes extend to the opening. When installing the housing 10, the cover plate 40 is removed, allowing the connection of the pipeline and the differential pressure transmitter to enter the two through holes from the opening. When the opening reaches the other side of the differential pressure transmitter, the cover plate 40 is installed, sealing the opening. This leaves only the upper and lower through holes in the housing 10, which are filled by the pipeline and the differential pressure transmitter. Then, locks and lead seals are installed on the locking ring 11 and the lead seal post 12 to enclose the three-valve manifold.

[0018] In summary, this utility model has a simple and compact structure, is easy to manufacture, and consists only of a protective housing and a locking mechanism. Furthermore, the locking method and housing size can be selected according to the user's preferences. Considering the limitations of actual application scenarios, a compact structural design is adopted to facilitate installation and use within limited spaces.

[0019] The design of this three-valve manifold switch protection device also emphasizes ease of maintenance, making it convenient for users to perform daily maintenance and upkeep. While preventing cheating, it is also easy to disassemble, facilitating the daily maintenance of the three-valve manifold and flow meter.

[0020] In addition, in this embodiment, the three-valve switch protection device consists only of a protective housing and a locking mechanism. The housing material with appropriate strength, as well as the lock and latch device, can be selected as needed, which can greatly reduce the cost of anti-cheating.

Claims

1. Guard for a three-valve group switch, characterized in that The box (10) is used for covering the three valve groups; The top plate (13) of the box (10) is provided with a second through hole (30) for accommodating a differential pressure transmitter connecting part; The bottom plate of the box (10) is provided with a first through hole (20) for accommodating a pipeline connected with the three valve groups; Further comprising a cover plate (40), which is an L-shaped plate, the first plate of the L-shaped plate is used for plugging the opening on one side plate of the box (10), and the second plate of the L-shaped plate is inserted into the slot of the top plate (13) or another side plate.

2. The guard for a triple valve block switch of claim 1, wherein, The box (10) is further provided with a lock ring (11), and the first plate is provided with a through hole for the lock ring (11) to pass through; Further comprising a lock, which is used for cooperating with the lock ring (11) to realize the locking and unlocking of the L-shaped plate.

3. The guard for a three valve bank switch of claim 2, wherein, The box (10) is further provided with a lead seal column (12), the first plate is provided with a through hole for the lead seal column (12) to pass through, and the outer end of the lead seal column (12) is provided with a lead seal through hole (A); Further comprising a lead seal, which is used for being installed on the lead seal through hole (A).

4. The guard for a triple valve block switch according to claim 2 or 3, wherein The first through hole (20) is a strip-shaped hole, which extends from the middle of the bottom plate to the edge thereof.

5. The guard for a three valve bank switch of claim 4, wherein, The second through hole (30) extends from the middle of the top plate to the edge thereof.

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