An injection device for pressure equipment

Abstract

This utility model relates to an injection device for pressure-bearing equipment, comprising: an injection cylinder, the first port of which is fitted with a flange for connecting to an interface of the pressure-bearing equipment, and the side wall of the injection cylinder is provided with an injection port for injecting a propellant; and an injection tube, axially inserted into the injection cylinder and communicating with the injection port, the first end of the injection tube being provided with an injection hole for injecting a propellant outlet. Simultaneously, the injection tube, driven by a first driving mechanism, can move axially relative to the injection cylinder, allowing the first end of the injection tube to extend or retract through the first port of the injection cylinder. The injection device of this utility model can inject propellant into the pressure-bearing equipment without affecting its operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of injection devices for industrial equipment, and specifically relates to an injection device for pressure-bearing equipment. Background Technology

[0002] Existing pressure-bearing equipment such as heat exchangers, reactors, and separation towers often accumulate material on their inner walls during operation, requiring regular cleaning; otherwise, this buildup can impair the equipment's performance. Simultaneously, additives such as corrosion inhibitors, anti-coking agents, and anti-coking agents also need to be injected into the pressure-bearing equipment as needed. Therefore, it is necessary to design an injection device for pressure-bearing equipment that can inject cleaning water, additives, and other agents into the equipment without affecting its operation. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an injection device for pressure-bearing equipment, which can inject a substance into the pressure-bearing equipment without affecting the operation of the pressure-bearing equipment, in light of the current state of the technology.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problem is: an injection device for pressure-bearing equipment, characterized in that it includes:

[0005] The syringe has a flange fitted at its first port for connecting to a pressure vessel interface, and the side wall of the syringe has an injection port for supplying injection solution.

[0006] An injection tube is inserted axially into the injection cylinder and communicates with the injection interface. The first end of the injection tube is provided with an injection hole for injection output. At the same time, the injection tube can move axially relative to the injection cylinder under the drive of the first drive mechanism, so that the first end of the injection tube can extend or retract through the first port of the injection cylinder.

[0007] In use, the flange is connected to the pressure equipment interface. Then, the first drive mechanism moves the injection tube, causing its first end to extend into the pressure equipment through the first port of the injection cylinder and the pressure equipment interface. External injection fluid is then introduced into the injection tube through the injection port and output from the injection hole at the first end of the injection tube. This allows for injection into the pressure equipment without shutting it down. By controlling the movement of the injection tube, the position of its first end within the pressure equipment can be adjusted, thereby regulating the injection range. After injection is complete, the first drive mechanism retracts the injection tube into the injection cylinder, without affecting the operation of the pressure equipment.

[0008] By selecting appropriate additives, such as cleaning water or additives like corrosion inhibitors, anticoagulants, and anticoking agents, the internal cleaning function of pressure equipment can be achieved, while also allowing for the injection of necessary additives into the pressure equipment.

[0009] Preferably, there are at least two injection holes, which are arranged circumferentially at intervals on the sidewall of the first end of the injection tube. This allows the injection to be sprayed out in multiple directions.

[0010] Preferably, injection holes are arranged circumferentially at intervals as a group, with at least two groups, and are arranged axially at intervals, with the injection holes of adjacent groups in the axial direction being staggered.

[0011] Furthermore, from the inside out, the injection hole is inclined toward the direction of the first end of the injection tube.

[0012] Preferably, the injection tube can rotate circumferentially under the drive of the second drive mechanism. This allows the injection direction of the medication to be adjusted as needed.

[0013] Preferably, the first driving mechanism has an axially extending telescopic shaft, the end of which is threadedly connected to the second end of the injection tube; the second driving mechanism acts on the side wall of the injection tube. That is, the telescopic movement of the telescopic shaft can drive the axial movement of the injection tube without affecting the circumferential rotation of the injection tube.

[0014] In order to drive the injection tube to rotate without affecting its axial movement, the injection cylinder further has the following axially connected components:

[0015] A first cylinder with the aforementioned flange and injection port;

[0016] The second cylinder can rotate around its own central axis under the drive of the second driving mechanism, and the second cylinder is arranged coaxially with the injection tube. The two are connected by a key to drive the injection tube to rotate circumferentially. At the same time, the keyway on the side wall of the injection tube extends along the axial direction of the injection tube so that the injection tube can move axially under the drive of the first driving mechanism.

[0017] Furthermore, the first cylinder has an axially extending inner peripheral wall and an outer peripheral wall located around the inner peripheral wall, forming an annular cavity with the inner peripheral wall. The outer peripheral wall is provided with the aforementioned injection port and flange. The inner peripheral wall is provided with a plurality of through holes spaced circumferentially for the injection fluid in the annular cavity to enter the first cylinder. This allows the injection fluid to enter the injection tube uniformly in the circumferential direction, thereby ensuring that the injection fluid can be uniformly sprayed from each injection hole on the injection tube.

[0018] Preferably, the injection tube has an axially extending strip-shaped hole on its wall to allow the injection solution in the first cylinder to enter the injection tube.

[0019] In the above embodiments, preferably, the pressure-bearing equipment is a heat exchanger, a reactor, or a separation tower.

[0020] Compared with the prior art, the advantages of this utility model are as follows: Through the design of an injection cylinder with a flange and an injection port, and an injection tube axially movable within the injection cylinder, in use, the flange is connected to the pressure equipment interface. Then, the injection tube is driven to move via a first drive mechanism, allowing the first end of the injection tube to extend into the pressure equipment through the first port of the injection cylinder and the pressure equipment interface. External injection is then introduced into the injection tube through the injection port and output from the injection hole at the first end of the injection tube. This enables injection into the pressure equipment without shutting down the equipment. After injection is complete, the first drive mechanism drives the injection tube to retract into the injection cylinder, without affecting the operation of the pressure equipment.

[0021] By selecting appropriate additives, such as cleaning water or additives like corrosion inhibitors, anticoagulants, and anticoking agents, the internal cleaning function of pressure equipment can be achieved, while also allowing for the injection of necessary additives into the pressure equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the injection device according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the injection device from another perspective according to an embodiment of the present invention;

[0024] Figure 3 This is a longitudinal sectional view of the injection device according to an embodiment of the present invention;

[0025] Figure 4 This is another longitudinal sectional view of the injection device according to an embodiment of the present invention;

[0026] Figure 5 This is a diagram showing the usage state of the injection device installed in a pressure-bearing device according to an embodiment of the present invention;

[0027] Figure 6 for Figure 5 Sectional view along the AA direction. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] like Figures 1-6 As shown, this is a preferred embodiment of an injection device for a pressure-bearing device according to the present invention. The pressure-bearing device is an existing spiral wound tube heat exchanger. The injection device includes an injection cylinder 1, an injection tube 3, a first drive mechanism 4, and a second drive mechanism 5.

[0030] The first port of the syringe 1 is fitted with a flange 2 for connecting to the interface of the pressure equipment, and the side wall of the syringe 1 is provided with an injection port 1a for injecting the injection agent.

[0031] The injection tube 3 is inserted axially into the injection cylinder 1 and communicates with the injection port 1a. The first end of the injection tube 3 has injection holes 30 for dispensing the injection solution. Two groups of injection holes 30 are arranged circumferentially at intervals on the sidewall of the first end of the injection tube 3, spaced apart axially, with adjacent groups of injection holes 30 staggered. From the inside out, each injection hole 30 is inclined towards the direction of the first end of the injection tube 3. Simultaneously, under the drive of the first drive mechanism 4, the injection tube 3 can move axially relative to the injection cylinder 1, allowing the first end of the injection tube 3 to extend or retract through the first port of the injection cylinder 1. Under the drive of the second drive mechanism 5, the injection tube 3 can rotate circumferentially to adjust the orientation of each injection hole 30.

[0032] To ensure that the operation of the first and second drive mechanisms does not interfere with each other, in this embodiment, the first drive mechanism 4 is a cylinder, which has an axially extending telescopic shaft that extends or retracts by rotating about its own central axis. The end of the telescopic shaft is threadedly connected to an adapter 32 in the second end of the injection tube 3 (the threaded hole 34 in the adapter 32 for connecting the end of the telescopic shaft is shown in the figure). Figure 3 , 4 The adapter 32 can rotate circumferentially relative to the injection tube 3 under the action of the telescopic shaft, and push the injection tube 3 to move axially (when the telescopic shaft of the first drive mechanism 4 can only move telescopically and without rotating, the end of the telescopic shaft of the first drive mechanism 4 can be directly screwed into the threaded hole in the second end of the injection tube 3 without the need for the above-mentioned adapter). The injection cylinder 1 has a second cylinder 12 connected axially and a first cylinder 11 with the above-mentioned flange 2 and injection interface 1a. The second cylinder 12 can rotate around its own central axis under the drive of the second drive mechanism 5, and the second cylinder 12 is arranged coaxially with the injection tube 3. The two are connected by a key 6 to drive the injection tube 3 to rotate circumferentially (when the injection tube 3 rotates circumferentially, the adapter 32 inside it remains stationary so that the circumferential rotation of the injection tube 3 does not affect the connection structure between the injection tube and the first drive mechanism). At the same time, the keyway 31 on the side wall of the injection tube 3 extends axially along the injection tube 3 so that the injection tube 3 can move axially under the drive of the first drive mechanism 4. In this embodiment, the second driving mechanism 5 is a cylinder. The cylinder body is rotatably connected to a bracket 13 fixed relative to the first cylinder 11, and the extension direction of the rotation axis is parallel to the axial direction of the first cylinder 11. The extension direction of the cylinder output shaft 51 is perpendicular to the axial direction of the first cylinder 11. A rotating shaft 52 is rotatably connected to the end of the cylinder output shaft 51. The end of the rotating shaft 52 is connected to the side wall of the second cylinder 12 to convert the extension and retraction force of the cylinder output shaft 51 into a circumferential rotation of the second cylinder 12 (the position of the rotating shaft 52 after the cylinder output shaft 51 is extended is as follows). Figure 6 (As shown by the dashed line).

[0033] In this embodiment, the first cylindrical body 11 has an axially extending inner peripheral wall 110 and an outer peripheral wall 111 located around the inner peripheral wall 110 and forming an annular cavity 100 with the inner peripheral wall 110. The outer peripheral wall 111 is provided with the aforementioned injection port 1a and flange 2. The inner peripheral wall 110 is provided with a plurality of through holes 112 spaced circumferentially for the injection in the annular cavity 100 to enter the first cylindrical body 11. The through holes 112 spaced circumferentially are grouped together, and there are multiple groups arranged axially. The injection tube 3 has a plurality of axially extending strip-shaped holes 33 spaced circumferentially on its wall to allow the injection in the first cylindrical body 11 to enter the injection tube 3.

[0034] In use, connect flange 2 to the pressure vessel interface 7, such as... Figure 5 As shown, the injection tube 3 is then moved by the first drive mechanism 4, causing the first end of the injection tube 3 to extend into the pressure equipment 7 through the first port of the injection cylinder 1 and the pressure equipment interface. External injection solution is then introduced into the injection tube 3 through the injection interface 1a and output from the injection hole 30 on the first end of the injection tube 3. This allows for injection into the pressure equipment without shutting down the equipment. During injection, the orientation of each injection hole 30 can be adjusted by rotating the injection tube 3 circumferentially via the second drive mechanism 5. After injection is complete, the first drive mechanism 4 moves the injection tube 3 back into the injection cylinder 1, without affecting the operation of the pressure equipment 7.

Claims

1. An injection device for a pressure containing apparatus, characterized in that Including: The syringe (1) has a flange (2) fitted at its first port for connecting to the interface of a pressure vessel, and the side wall of the syringe (1) is provided with an injection port (1a) for injecting the injection agent. An injection tube (3) is inserted axially into the injection cylinder (1) and communicates with the injection port (1a). The first end of the injection tube (3) is provided with an injection hole (30) for injection output. At the same time, the injection tube (3) can move axially relative to the injection cylinder (1) under the drive of the first drive mechanism (4), so that the first end of the injection tube (3) can extend or retract through the first port of the injection cylinder (1).

2. An injection device according to claim 1, wherein: There are at least two injection holes (30), which are arranged circumferentially at intervals on the sidewall of the first end of the injection tube (3).

3. An injection device according to claim 2, wherein: There are at least two groups of injection holes (30) arranged circumferentially at intervals, and they are arranged axially at intervals, with the injection holes (30) of adjacent groups in the axial direction being staggered.

4. An injection device according to claim 2, wherein: From the inside out, the injection hole (30) is inclined toward the direction of the first end of the injection tube (3).

5. The injection device according to claim 2, characterized in that: The injection tube (3) can rotate circumferentially under the drive of the second drive mechanism (5).

6. The injection device according to claim 5, characterized in that: The first drive mechanism (4) has an axially extending telescopic shaft, the end of which is threadedly connected to the second end of the injection tube (3); the second drive mechanism (5) acts on the side wall of the injection tube (3).

7. The injection device according to claim 6, characterized in that: The injection cylinder (1) has the following features connected along the axial direction: A first cylinder (11) with the aforementioned flange (2) and injection port (1a); The second cylinder (12) can rotate around its own central axis under the drive of the second driving mechanism (5), and the second cylinder (12) and the injection tube (3) are arranged coaxially and connected by a key (6) to drive the injection tube (3) to rotate circumferentially. At the same time, the keyway (31) on the side wall of the injection tube (3) extends along the axial direction of the injection tube (3) so that the injection tube (3) can move axially under the drive of the first driving mechanism (4).

8. The injection device according to claim 7, characterized in that: The first cylindrical body (11) has an axially extending inner peripheral wall (110) and an outer peripheral wall (111) located around the inner peripheral wall (110) and forming an annular cavity (100) between the inner peripheral wall (110) and the inner peripheral wall (110). The outer peripheral wall (111) is provided with the above-mentioned injection port (1a) and flange (2). The inner peripheral wall (110) is provided with a plurality of through holes (112) spaced circumferentially for the injection in the annular cavity (100) to enter the first cylindrical body (11).

9. The injection device according to claim 8, characterized in that: The injection tube (3) has an axially extending strip-shaped hole (33) on its wall to allow the injection agent in the first cylinder (11) to enter the injection tube (3).

10. The injection device according to any one of claims 1 to 9, characterized in that: The pressure vessel (7) is a heat exchanger, reactor, or separation tower.

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