Device for teaching simulation of valves and pipelines

Abstract

The utility model relates to the technical field of teaching aids, in particular to a device for teaching simulation of valves and pipelines, which comprises a bottom plate, a positioning elbow, a maintenance gate valve, a movable elbow and a left fixing plate, the maintenance gate valve is positioned between the positioning elbow and the movable elbow, a telescopic sleeve is connected between the maintenance gate valve and the movable elbow, and the left fixing plate is provided with a left fixing plate and a right fixing plate. A left flange plate is arranged on one side of the positioning bent pipe, a right flange plate is arranged on the other side of the positioning bent pipe and is in threaded connection with a right fixing plate through a first inner hexagon screw, four base plates are arranged between the bottom of the left fixing plate and the bottom plate, two sliding through grooves are formed in the left fixing plate, and first T-shaped screws connected into the sliding through grooves in a sliding mode are arranged on the left fixing plate. A first positioning nut in threaded connection with the first T-shaped screw is arranged above the left fixing plate, the side edge of the positioning bent pipe and the side edge of the movable bent pipe are each provided with a four-branch connector, and a manual valve is arranged on each four-branch connector. According to the structure, the length of the pipeline can be adjusted according to requirements, and installation during teaching is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of valve assembly, in particular to a device for teaching simulation valves and pipelines. Background Art

[0002] At present, students' knowledge about liquid pipeline valves basically comes from textbooks, and they do not have a substantial understanding of the structure and principle of pipelines and valves. For pipeline valve installation and maintenance work, they have to relearn after entering the job, and it is difficult to quickly enter the working state. In order to solve the problem that students cannot effectively understand pipelines and valves after training, and overcome the psychological barrier of existing employees who "dare not do it" when facing pipeline valve maintenance tasks alone without proficiency in skills, a teaching simulation pipeline device is generally set up. For example, the patent number is 201520052696.2, and the patent name is: A device for teaching simulation modification of valves, which includes explosion-proof flexible pipes, explosion-proof flexible pipe fixing frames, stainless steel threading pipes, proximity switches, proximity switch fixing frames, and sensing devices. It is mainly for remote monitoring of liquid transmission, but the pipe length in the structure cannot be adjusted, resulting in the installation position of the water pipe being connected to the external pipe during the teaching process being restricted, so it needs to be improved. Utility Model Content

[0003] In view of the above problems existing in the prior art, the technical problem to be solved by the present invention is that the length of the current teaching simulation pipeline cannot be adjusted, which results in the problem that the later installation position is restricted.

[0004] In order to solve the above technical problems, the utility model discloses a device for teaching simulation valves and pipelines, including a base plate, a positioning elbow, a maintenance gate valve, a movable elbow and a left fixed plate, a telescopic sleeve is connected between the maintenance gate valve and the movable elbow, one end of the telescopic sleeve is connected to a connecting pipe on one side of the maintenance gate valve, the other end of the telescopic sleeve is communicated with one side of the movable elbow, a left flange plate is arranged on the other side of the movable elbow, the connecting pipe on the other side of the maintenance gate valve is communicated with one side of the positioning elbow, a right flange plate is arranged on the other side of the positioning elbow, and the right flange plate is connected through more than one A hexagon socket screw is threadedly connected to a right fixed plate; the left fixed plate is fixed to the left side of the base plate, and the right fixed plate is fixed to the right side of the base plate. Four pads distributed front, back, left and right are arranged between the bottom of the left fixed plate and the base plate. Two sliding grooves rising along the length direction of the left fixed plate are arranged on the left fixed plate. A T-screw slidably connected to the sliding groove is arranged on the left fixed plate. A positioning nut threadedly connected to the T-screw is arranged above the left flange plate. Four-branch joints are arranged on the sides of the positioning elbow and the movable elbow, and a manual valve is arranged on the four-branch joint.

[0005] Preferably, in order to further achieve a guiding effect and avoid position displacement during movement, two L-shaped guide rails are arranged above the base plate, and the side of the crossbeam of each L-shaped guide rail contacts one side of the two pads on the same side, and the head of the T-shaped screw is slidably connected in the L-shaped guide rail.

[0006] Preferably, in order to facilitate assembly and arbitrary combination, a left positioning plate 1 is provided on the left side of the telescopic sleeve, a right positioning plate 1 is provided on the right side of the telescopic sleeve, and a left positioning plate 2 cooperating with the right positioning plate 1 is provided on the connecting pipe on one side of the maintenance gate valve, and one or more T-screws 2 are arranged in an annular manner between the right positioning plate 1 and the left positioning plate 2, and the T-screws 2 sequentially penetrate the right positioning plate 1 and the left positioning plate 2 and are threadedly connected with the positioning nut 2, a waterproof pad 1 is arranged between the right positioning plate 1 and the left positioning plate 2, and a right positioning plate 2 cooperating with the left positioning plate 1 is provided on one side of the movable elbow, and one or more T-screws 3 are arranged in an annular manner between the left positioning plate 1 and the right positioning plate 2, and the T-screws 3 sequentially penetrate the left positioning plate 1 and the right positioning plate 2 and are threadedly connected with the positioning nut 3 A waterproof pad 2 is arranged between the left positioning disk 1 and the right positioning disk 2, a right positioning disk 3 is arranged on the connecting pipe on the other side of the maintenance gate valve, and a left positioning disk 3 cooperating with the right positioning disk 3 is arranged on the side of the positioning elbow, and more than one T-screw 4 is arranged in a ring between the left positioning disk 3 and the right positioning disk 3, and the T-screw 4 sequentially penetrates the left positioning disk 3 and the right positioning disk 3 and is threadedly connected with the positioning nut 4, and a waterproof pad 3 is arranged between the left positioning disk 3 and the right positioning disk 3. The arrangement of the above structure can facilitate the later combination. When the telescopic sleeve is not needed, the telescopic sleeve can be quickly removed to connect the left side of the maintenance gate valve with the mobile elbow, or the maintenance gate valve and the telescopic sleeve are not used, and the mobile elbow is directly connected to the positioning elbow, which finally realizes the convenience of arbitrary assembly in the later stage.

[0007] Preferably, in order to facilitate disassembly, one or more locking nuts 1 are provided in the left fixed plate, and one or more hexagon socket screws 3 are passed through the left side of the bottom of the base plate and are threadedly connected to the locking nuts 1 in a one-to-one manner; one or more locking nuts 2 are provided in the right fixed plate, and one or more hexagon socket screws 2 are passed through the right side of the bottom of the base plate and are threadedly connected to the locking nuts 2 in a one-to-one manner. The threaded connection between the hexagon socket screws and the locking nuts facilitates the later disassembly of the corresponding left fixed plate or right fixed plate.

[0008] Preferably, in order to raise the bottom and improve the overall strength of the bottom, a channel steel with an opening facing downward is provided on both sides of the bottom of the bottom plate. The three hexagon socket screws on the left side sequentially pass through the left channel steel and the bottom plate and are threadedly connected with the locking nut one in the left fixed plate. The two hexagon socket screws on the right side sequentially pass through the right channel steel and the bottom plate and are threadedly connected with the locking nut two in the right fixed plate. In this structure, by adding a channel steel at the bottom of the bottom plate, the overall strength of the bottom is ultimately improved.

[0009] Preferably, in order to increase the friction of the bottom and prevent it from moving randomly after placement, silicone sleeves are sleeved on both sides of the channel steel. The added silicone sleeves can increase the friction between the bottom and the placement position, ultimately preventing it from moving randomly after placement and not damaging the ground on which it is placed.

[0010] Preferably, in order to realize the ability to perform pressure resistance testing on the inside of the pipeline and facilitate sewage discharge in the later stage, a pressure resistance testing port connected to the inside of the movable elbow is provided above the movable elbow, and a sewage outlet is provided on the bottom side of the positioning elbow, and a sewage outlet is provided on the sewage outlet. A manual sewage valve is provided on the sewage outlet. By adding a pressure resistance testing port, this structure can be connected to a pressure detection sensor to check the internal pressure of the pipeline in the later stage, and a sewage outlet is provided on the bottom side of the positioning elbow, which is convenient for regular sewage discharge and cleaning of the inside of the pipeline in the later stage.

[0011] Compared with the prior art, the utility model has at least the following advantages:

[0012] 1. In this structure, a fixed positioning elbow is used on the left side of the bottom plate, and a horizontally adjustable mobile elbow structure is used on the right side. A telescopic sleeve that can be stretched or folded as the mobile elbow moves and a maintenance gate valve are connected in sequence between the mobile elbow and the positioning elbow. At the same time, the mobile elbow adopts a T-screw and a positioning nut to realize the movement or locking state of the mobile elbow. When moving, the positioning nut is loosened, so that the left flange plate can move horizontally along the sliding groove to adjust the length between the positioning elbow and the mobile elbow, which is convenient for the side four-joint to be adjusted horizontally according to the installation position, and finally facilitates the adjustment of the entire pipeline length during the teaching process, solving the problem of installation difficulties caused by insufficient length of the existing pipeline;

[0013] 2. The maintenance gate valve provided in this structure can be closed according to teaching requirements to ensure that the left and right sides of the internal pipeline are blocked, which is convenient for the maintenance operation of the internal pipeline during the teaching process. When opened, the entire pipeline is connected, and finally the practical tutorial operation of the pipeline and valve is realized during the teaching process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front structural reference diagram of a device for teaching simulation valves and pipelines described in Example 1;

[0015] Figure 2 A top view reference diagram of a device for teaching simulation valves and pipelines described in Example 1;

[0016] Figure 3 This is a schematic diagram on the left side of a device for teaching simulation valves and pipelines described in Example 1;

[0017] Figure 4 for Figure 1 A in the enlarged view;

[0018] Figure 5 This is a schematic diagram on the left side of a device for teaching simulation valves and pipelines described in Example 2;

[0019] Figure 6 This is a partial cross-sectional schematic diagram of a device for teaching simulation valves and pipelines described in Example 3 when no motor mounting parts are installed on the upper part.

[0020] In the figure, bottom plate 1, positioning elbow 2, maintenance gate valve 3, movable elbow 4, left flange plate 401, left fixed plate 5, telescopic sleeve 6, connecting pipe 301, right flange plate 7, hexagon socket screw 1 8, right fixed plate 9, backing plate 10, sliding groove 11, T-type screw 1 12, positioning nut 1 13, four-way joint 1 14, manual valve 1 15, four-way joint 2 17, manual valve 2 16, L-shaped guide rail 18, crossbeam 181, left positioning plate 1 19, right positioning plate 1 20, left positioning plate 2 21, T-type screw 2 22, positioning screw Mother two 23, waterproof pad one 24, right positioning plate two 25, T-screw three 26, positioning nut three 27, waterproof pad two 28, right positioning plate three 29, left positioning plate three 30, T-screw four 31, waterproof pad three 32, locking nut one 33, locking nut two 34, hexagon socket screw two 35, channel steel 36, hexagon socket screw three 37, silicone sleeve 38, pressure test port 39, sewage outlet 40, sewage manual valve 41, positioning nut four 42, positioning frame one 19-1, positioning frame two 20-1, guide rod 42, guide sleeve 43. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "sleeved / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components; for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Embodiment 1:

[0025] See also Figure 1-4 The present embodiment discloses a device for teaching simulation valves and pipelines, comprising a base plate 1, a positioning elbow 2, a maintenance gate valve 3, a movable elbow 4 and a left fixed plate 5, a telescopic sleeve 6 is connected between the maintenance gate valve 3 and the movable elbow 4, one end of the telescopic sleeve 6 is connected to a connecting pipe 301 on one side of the maintenance gate valve 3, the other end of the telescopic sleeve 6 is communicated with one side of the movable elbow 4, a left flange plate 401 is provided on the other side of the movable elbow 4, the connecting pipe 301 on the other side of the maintenance gate valve 3 is communicated with one side of the positioning elbow 2, a right flange plate 7 is provided on the other side of the positioning elbow 2, the right flange plate 7 is threadedly connected to a right fixed plate 9 by more than one hexagon socket screw 8; the left fixed plate 5 is fixed to the left side of the base plate 1, and the right fixed plate 9 is fixed to On the right side of the base plate 1, four pads 10 distributed front, back, left and right are arranged between the bottom of the left fixed plate 5 and the base plate 1, two sliding grooves 11 rising along the length direction of the left fixed plate 5 are arranged on the left fixed plate 5, and a T-screw 12 slidably connected to the sliding groove 11 is arranged on the left fixed plate 5, and a positioning nut 13 threadedly connected to the T-screw 12 is arranged above the left flange plate 401, and a four-branch joint is arranged on the side of the positioning elbow 2 and the side of the movable elbow 4, and a manual valve is arranged on the four-branch joint. In this embodiment, a four-branch joint 14 is arranged on the side of the positioning elbow 2, and a manual valve 15 is arranged on the four-branch joint 14, and a four-branch joint 2 17 is arranged on the side of the movable elbow 4, and a manual valve 2 16 is arranged on the four-branch joint 2 17.

[0026] In this embodiment, a fixed positioning elbow 2 is adopted on the left side of the bottom plate 1, and a horizontally adjustable movable elbow 4 structure is adopted on the right side, and a telescopic sleeve 6 which can be stretched or folded as the movable elbow 4 moves and a maintenance gate valve 3 are connected in sequence between the movable elbow 4 and the positioning elbow 2. The maintenance gate valve 3 can be closed according to teaching requirements to ensure that the left and right sides of the internal pipeline are blocked, which is convenient for the maintenance operation of the internal blockage during pipeline maintenance during teaching. When opened, the entire pipeline is connected. When moving, the positioning nut 13 is loosened. At this time, the positioning nut 13 will not lock the left flange plate 401 and the left fixed plate 5. Therefore, the left flange plate 401 can be horizontally moved along the sliding groove 11 to adjust the positioning elbow 2 and the movable elbow. 4, which makes it convenient for the side four-way joint 2 17 to be horizontally adjusted according to the installation position, and finally facilitates the adjustment of the entire pipeline length during the teaching process, solving the problem of the existing pipeline being difficult to install due to insufficient length. After the position is installed, all the positioning nuts 13 are tightened. At this time, the positioning nuts 13 lock the left flange plate 401 and the left fixed plate 5 so that they cannot move. Then, during the teaching process, the water inlet pipeline is connected to the four-way joint 2 17, and the water outlet pipeline is connected to the four-way joint 14. The manual valve 15 and the manual valve 2 16 are opened during the teaching process to realize the conduction operation of the pipeline. In addition, during the maintenance of the pipeline, the maintenance gate valve 3 is opened or closed, and the practical tutorial operation of the pipeline and valve is realized during the teaching process.

[0027] Preferably, in order to further achieve a guiding effect and avoid position displacement during movement, two L-shaped guide rails 18 are provided above the base plate 1, and the side of the crossbeam 181 of each L-shaped guide rail 18 contacts one side of the two pads 10 on the same side, and the head of the T-shaped screw 12 is slidably connected in the L-shaped guide rail 18. In this embodiment, an L-shaped guide rail 18 is added to cooperate with the side of the pad 10 to form a U-shaped guide groove, so that the head of the T-shaped screw 12 can move in the guide groove.

[0028] Preferably, in order to facilitate assembly and arbitrary combination, a left positioning plate 19 is provided on the left side of the telescopic sleeve 6, a right positioning plate 20 is provided on the right side of the telescopic sleeve 6, and a left positioning plate 21 cooperating with the right positioning plate 20 is provided on the connecting pipe 301 on one side of the maintenance gate valve 3. One or more T-type screws 22 are arranged in an annular manner between the right positioning plate 20 and the left positioning plate 21. The T-type screws 22 sequentially penetrate the right positioning plate 20 and the left positioning plate 21 and are threadedly connected with the positioning nut 23. A waterproof pad 24 is provided between the right positioning plate 20 and the left positioning plate 21. A right positioning plate 25 cooperating with a left positioning plate 19 is provided on one side of the movable elbow 4, and one or more T-screws 3 26 are provided in an annular manner between the left positioning plate 19 and the right positioning plate 25. The T-screws 3 26 sequentially penetrate the left positioning plate 19 and the right positioning plate 25 and are threadedly connected with the positioning nuts 3 27. A waterproof pad 28 is provided between the left positioning plate 19 and the right positioning plate 25. A right positioning plate 3 29 is provided on the connecting pipe 301 on the other side of the maintenance gate valve 3. A left positioning plate 3 30 cooperating with the right positioning plate 3 29 is provided on the side of the positioning elbow 2. The left positioning plate 3 30 and One or more T-screws four 31 are arranged in a ring between the right positioning disk three 29, and the T-screws four 31 pass through the left positioning disk three 30 and the right positioning disk three 29 in sequence and are threadedly connected with the positioning nuts four 42. A waterproof pad three 32 is arranged between the left positioning disk three 30 and the right positioning disk three 29. The arrangement of the above structure can facilitate the later combination. When the telescopic sleeve 6 is no longer needed, the telescopic sleeve 6 can be quickly removed to connect the left side of the maintenance gate valve 3 with the movable elbow 4, or the maintenance gate valve 3 and the telescopic sleeve 6 are not used, and the movable elbow 4 is directly connected to the positioning elbow 2, which finally realizes the convenience of arbitrary assembly in the later stage. In this embodiment, in order to ensure that there is no positional displacement when the telescopic sleeve 6 is stretched horizontally, four positioning frames 19-1 are arranged in a ring on the left positioning plate 19 on the left side of the telescopic sleeve 6, and four positioning frames 20-1 are arranged in a ring on the right positioning plate 20 on the right side of the telescopic sleeve 6. Then, a guide rod 42 is fixed to each positioning frame 19-1, and a guide sleeve 43 is fixed to each positioning frame 20-1. Each guide rod 42 is plugged into a corresponding guide sleeve 43. When the telescopic sleeve 6 moves, the guide rod 42 is moved in the guide sleeve 43 to play a guiding and positioning role, thereby avoiding positional displacement during movement.

[0029] Preferably, in order to facilitate disassembly, at least one locking nut 33 is provided in the left fixing plate 5, and the left side of the bottom of the base plate 1 is passed through at least one hexagon socket screw 37 and then threadedly connected with the locking nut 33 in a one-to-one manner. At least one locking nut 2 34 is provided in the right fixing plate 9, and the right side of the bottom of the base plate 1 is passed through at least one hexagon socket screw 2 35 and then threadedly connected with the locking nut 2 34 in a one-to-one manner. The threaded connection between the hexagon socket screw and the locking nut is adopted to facilitate the later disassembly of the corresponding left fixing plate 5 or the right fixing plate 9. In this embodiment, the left fixing plate 5 on the left side is fixed to the base plate 1, and the right fixing plate 9 on the right side is fixed to the right side of the base plate 1. In this embodiment, there are a total of 14 hexagon socket screws 37, so the corresponding locking nuts 33 also need 14, and there are a total of 12 hexagon socket screws 2 35, so the corresponding locking nuts 2 3 4 also requires 12. During installation, the corresponding hexagon socket screws can be passed through the bottom plate 1 and then connected with the locking nuts to achieve fixed installation, which is also convenient for disassembly later. At the same time, in this embodiment, in order to raise the bottom and improve the overall strength of the bottom, a channel steel 36 with an opening facing downward is provided on both sides of the bottom of the bottom plate 1. The hexagon socket screw 37 on the left side passes through the left channel steel 36 and the bottom plate 1 in sequence and is threadedly connected with the locking nut 33 in the left fixing plate 5. The hexagon socket screw 2 35 on the right side passes through the right channel steel 36 and the bottom plate 1 in sequence and is threadedly connected with the locking nut 2 34 in the right fixing plate 9. In this structure, a channel steel 36 is added to the bottom of the bottom plate 1 to ultimately improve the overall strength of the bottom. In this embodiment, in order to fix the pad 10, some of the hexagon socket screws 37 need to pass through the right channel steel 36, the bottom plate 1, and the pad 10 in sequence and are threadedly connected with the locking nut 2 34 in the right fixing plate 9, such as Figure 3 shown.

[0030] Embodiment 2:

[0031] See also Figure 5 The present embodiment discloses a device for teaching simulation valves and pipelines. Preferably, the friction of the bottom is improved to avoid random movement after placement. Silicone sleeves 38 are sleeved on both sides of the channel steel 36. The added silicone sleeves 38 can increase the friction between the bottom and the placement position, ultimately avoiding random movement after placement, and will not damage the placement ground.

[0032] Embodiment 3:

[0033] See also Figure 6The present embodiment discloses a device for teaching simulation valves and pipelines. As a preferred embodiment, it is possible to perform pressure resistance detection on the inside of the pipeline and facilitate sewage discharge in the later stage. A pressure resistance detection port 39 connected to the inside of the mobile elbow 4 is provided above the mobile elbow 4, and a sewage outlet 40 is provided on the bottom side of the positioning elbow 2. A sewage discharge manual valve 41 is provided on the sewage outlet 40. By adding the pressure resistance detection port 39, the structure can be connected to a pressure detection sensor to check the internal pressure of the pipeline in the later stage, and a sewage outlet 40 is provided on the bottom side of the positioning elbow 2, which is convenient for regular sewage discharge and cleaning of the inside of the pipeline in the later stage.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A device for teaching simulation of valves and pipelines, comprising a base plate (1), characterized in that: It also includes a positioning elbow (2), a maintenance gate valve (3), a movable elbow (4) and a left fixed plate (5). A telescopic sleeve (6) is connected between the maintenance gate valve (3) and the movable elbow (4). One end of the telescopic sleeve (6) is connected to a connecting pipe (301) on one side of the maintenance gate valve (3). The other end of the telescopic sleeve (6) is communicated with one side of the movable elbow (4). A left flange plate (401) is provided on the other side of the movable elbow (4). The connecting pipe (301) on the other side of the maintenance gate valve (3) is communicated with one side of the positioning elbow (2). A right flange plate (7) is provided on the other side of the positioning elbow (2). The right flange plate (7) is connected to a right fixed plate (9) by one or more hexagon socket head screws (8). Threaded connection; the left fixed plate (5) is fixed on the left side of the bottom plate (1), the right fixed plate (9) is fixed on the right side of the bottom plate (1), four pads (10) distributed front, back, left and right are arranged between the bottom of the left fixed plate (5) and the bottom plate (1), two sliding grooves (11) are arranged on the left fixed plate (5) along the length direction of the left fixed plate (5), a T-shaped screw (12) slidably connected in the sliding groove (11) is arranged on the left fixed plate (5), a positioning nut (13) threadedly connected to the T-shaped screw (12) is arranged above the left flange plate (401), and a four-way joint is arranged on the side of the positioning elbow (2) and the side of the movable elbow (4), and a manual valve is arranged on the four-way joint.

2. The device for teaching simulation of valves and pipelines according to claim 1, characterized in that: Two L-shaped guide rails (18) are also arranged above the bottom plate (1), and the side surface of the crossbeam (181) of each L-shaped guide rail (18) contacts one surface of the two pads (10) on the same side, and the head of the T-shaped screw (12) is slidably connected in the L-shaped guide rail (18).

3. The device for teaching simulation of valves and pipelines according to claim 2, characterized in that: A left positioning plate (19) is arranged on the left side of the telescopic sleeve (6), a right positioning plate (20) is arranged on the right side of the telescopic sleeve (6), a left positioning plate (21) cooperating with the right positioning plate (20) is arranged on the connecting pipe (301) on one side of the maintenance gate valve (3), one or more T-shaped screws (22) are arranged in an annular manner between the right positioning plate (20) and the left positioning plate (21), the T-shaped screws (22) sequentially penetrate the right positioning plate (20) and the left positioning plate (21) and are then threadedly connected with the positioning nuts (23), a waterproof pad (24) is arranged between the right positioning plate (20) and the left positioning plate (21), a right positioning plate (25) cooperating with the left positioning plate (19) is arranged on one side of the movable bent pipe (4), one or more T-shaped screws (22) are arranged in an annular manner between the left positioning plate (19) and the right positioning plate (25), and The T-screw three (26) is threadedly connected to the positioning nut three (27) after passing through the left positioning disk one (19) and the right positioning disk two (25) in sequence. A waterproof pad two (28) is arranged between the left positioning disk one (19) and the right positioning disk two (25). A right positioning disk three (29) is arranged on the connecting pipe (301) on the other side of the maintenance gate valve (3). A left positioning disk three (30) cooperating with the right positioning disk three (29) is arranged on the side of the positioning elbow (2). One or more T-screws four (31) are arranged in an annular shape between the left positioning disk three (30) and the right positioning disk three (29). The T-screw four (31) is threadedly connected to the positioning nut four (42) after passing through the left positioning disk three (30) and the right positioning disk three (29) in sequence. A waterproof pad three (32) is arranged between the left positioning disk three (30) and the right positioning disk three (29).

4. The device for teaching simulation of valves and pipelines according to claim 3 is characterized in that: One or more locking nuts (33) are arranged in the left fixing plate (5), and one or more hexagon socket screws (37) are passed through the left side of the bottom of the base plate (1) and are threadedly connected to the locking nuts (33) in a one-to-one manner. One or more locking nuts (34) are arranged in the right fixing plate (9), and one or more hexagon socket screws (35) are passed through the right side of the bottom of the base plate (1) and are threadedly connected to the locking nuts (34) in a one-to-one manner.

5. The device for teaching simulation of valves and pipelines according to claim 4, characterized in that: A channel steel (36) with an opening facing downward is provided on both sides of the bottom of the base plate (1). The left hexagon socket head screw (37) passes through the left channel steel (36) and the base plate (1) in sequence and is threadedly connected to the locking nut (33) in the left fixing plate (5). The right hexagon socket head screw (35) passes through the right channel steel (36) and the base plate (1) in sequence and is threadedly connected to the locking nut (34) in the right fixing plate (9).

6. The device for teaching simulation of valves and pipelines according to claim 5, characterized in that: Silicone sleeves (38) are sleeved on both sides of the channel steel (36).

7. The device for teaching simulation of valves and pipelines according to claim 3, characterized in that: A pressure resistance detection port (39) communicating with the interior of the movable bend pipe (4) is arranged above the movable bend pipe (4), a sewage outlet (40) is arranged on the side of the bottom of the positioning bend pipe (2), and a sewage manual valve (41) is arranged on the sewage outlet (40).

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