Instrument air blowing device

Abstract

The utility model relates to the field of equipment maintenance, in particular to an instrument air blowing device which comprises an instrument air drying air tank provided with a pressure gauge installation connector and a pressure gauge. The connecting pipe is detachably connected with a purging pipe, the purging pipe comprises a hose section, and a valve is arranged on the connecting pipe; and the three-way structure is communicated with the pressure gauge mounting interface, the pressure gauge and the connecting pipe. According to the instrument air blowing device, the three-way structure is additionally arranged on the instrument air-drying air tank through an original pressure gauge installation connector, when a radiator needs to be blown, the instrument air-drying air tank serves as an air source, air is taken nearby to replace independently-arranged air supply equipment, blowing efficiency is high, and the risk that the equipment falls off and is damaged does not exist; and the maintenance workload and the maintenance cost are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of equipment maintenance, especially a kind of instrument air blowing device. BACKGROUND

[0002] Instrument air is used to provide compressed air for valve, instrument etc. in natural gas station site, and generally all are in open-air working condition, influenced by outdoor dust and electrostatic adsorption, among which radiator will appear dust covering or blocking with the extension of use time, influence heat dissipation effect, lead to equipment temperature continuously rising, and need operating personnel to maintain and clean radiator.

[0003] In the maintenance and cleaning process of existing radiator, operating personnel generally uses independent air compressor to supply air, and handheld pipeline connected to air compressor to blow and clean, but pipeline is complex in operating site, air compressor is not easy to place stably in operating site, and pipeline length cannot be adjusted arbitrarily, in the blowing process, air compressor is easily moved due to the movement of pipeline, even causes pulling damage to instrument in operation in operating site, influence blowing efficiency and exist equipment falling and damage risk. UTILITARIAN CONTENT

[0004] The utility model aims at overcoming the deficiency of low blowing efficiency and equipment falling and damage risk in the prior art that existing instrument air system uses artificial to carry air compressor and pipeline to clean, and provides a kind of instrument air blowing device.

[0005] The utility model provides a kind of instrument air blowing device, comprising

[0006] Instrument air dry gas tank is equipped with pressure gauge installation interface and pressure gauge;

[0007] Connecting pipe, the connecting pipe is detachably connected blowing pipe, the blowing pipe includes hose section, and the connecting pipe is equipped with valve;

[0008] Three-way structure is communicated the pressure gauge installation interface, the pressure gauge and the connecting pipe.

[0009] A kind of instrument air blowing device of the utility model, three-way structure is added on instrument air dry gas tank using original pressure gauge installation interface, when needing to carry out radiator blowing, by instrument air dry gas tank as gas source, air is taken nearby to replace independently set gas supply equipment, blowing efficiency is high and there is no equipment falling and damage risk, reduce maintenance workload and maintenance cost.

[0010] Preferably, the pressure gauge mounting interface is linearly penetrated by the pressure gauge, and the connecting pipe is perpendicular to the line connecting the pressure gauge mounting interface and the pressure gauge. The pressure gauge can normally monitor the gas pressure in the instrument air drying tank, and meanwhile, the setting of the connecting pipe does not affect the normal observation of the pressure gauge, and the increase of the connecting pipe is facilitated.

[0011] Preferably, the tee structure comprises:

[0012] A straight-through part for connecting the pressure gauge mounting interface and the pressure gauge, and a side through hole is arranged on the straight-through part;

[0013] A sleeve is rotationally arranged on the straight-through part, and a sealing element is embedded on the inner wall of the sleeve;

[0014] A branch pipe is vertically penetrated through the sleeve, the branch pipe can be communicated with the side through hole, and the branch pipe is communicated with the connecting pipe. The tee structure can adjust the extension direction of the connecting pipe through the relative rotation of the sleeve and the straight-through part, and the radiator at different positions can be conveniently purged and cleaned.

[0015] Preferably, a plurality of side through holes are arranged around the straight-through part. After the sleeve is rotated, the smoothness of the airflow in the connecting pipe can still be maintained.

[0016] Preferably, the connecting pipe and the purge pipe are connected through a quick connector. The connection of the connecting pipe and the purge pipe is facilitated, and the purge pipe can be connected according to the actual situation.

[0017] Preferably, the valve comprises a throttling stop valve. The airflow size can be adjusted through the throttling stop valve.

[0018] Preferably, a hard pipe section is arranged at the end of the purge pipe away from the tee structure. The tail end of the purge pipe is convenient for hand holding, and the position can be moved during the blowing process.

[0019] Preferably, a nozzle is connected to the hard pipe section. The nozzle can provide more suitable airflow for blowing.

[0020] Preferably, an illumination mechanism is arranged on the nozzle or the hard pipe section. The cleaning condition of the position with insufficient light in the radiator can be conveniently observed.

[0021] Preferably, at least one bracket member is detachably connected to the purge pipe, and the bracket member can be magnetically connected to the instrument air drying tank. The purge pipe can be conveniently placed during use and after use, and the normal operation of the on-site equipment is avoided.

[0022] Compared with the prior art, the utility model has the beneficial effects that:

[0023] The utility model provides a kind of instrument air blowing device, by using original pressure gauge installation interface to add tee structure on instrument air drying gas tank, when needing to carry out radiator blowing, by instrument air drying gas tank as gas source, gas is replaced by the gas supply equipment independently arranged in the vicinity, can realize the improvement of blowing efficiency and there is no equipment drop, damage risk, reduce maintenance workload and maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is structural schematic view of tee structure described in embodiment 1;

[0025] Figure 2 It is connection schematic view of tee structure described in embodiment 1 and the connection pipe;

[0026] Figure 3 It is structural schematic view of blowing pipe described in embodiment 1;

[0027] Figure 4 It is use state schematic view of a kind of instrument air blowing device of embodiment 1;

[0028] Markings in the drawing:

[0029] 1-tee structure, 11-straight-through part, 12-side through hole, 13-sleeve, 14-sealing element, 15-branch pipe, 2-connection pipe, 3-blowing pipe, 31-hose section, 32-hard tube section, 4-valve, 5-quick connector, 6-nozzle, 7-illumination mechanism, 8-bracket member, 9-instrument air drying gas tank, 91-pressure gauge installation interface, 92-pressure gauge, 10-radiator. DETAILED DESCRIPTION

[0030] The utility model will be further described in detail in combination with specific embodiment. But this should not be understood as the range of the above-mentioned subject matter of the utility model is limited to the following examples, and any technology realized based on the content of the utility model belongs to the scope of the utility model.

[0031] In the description of the specific embodiments of the utility model, the orientation or positional relationship terms expressed by "up", "down", "left", "right", "center", "inner" and "outer" appear without special indication, which are based on the orientation or positional relationship expressed in the drawings, or the orientation or positional relationship when the product / equipment / device of the utility model is usually used. These orientation or positional relationship terms are only used to facilitate the description of the utility model scheme or simplify the description in specific embodiments, so as to facilitate the quick understanding of the scheme by technicians, and are not intended to indicate or imply that a specific device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship, so it cannot be understood as a limitation on the utility model.

[0032] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or overhanging or parallel, but can be slightly inclined or have a deviation. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. Alternatively, it can be simplified to understand that the corresponding device / component / element is arranged in the direction of "horizontal", "vertical", "overhanging", "parallel" and the like, and can have an error / deviation of ±10% relative to the corresponding direction, more preferably an error / deviation of ±8%, more preferably an error / deviation of ±6%, more preferably an error / deviation of ±5%, more preferably an error / deviation of ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the utility model scheme.

[0033] In addition, the terms "first", "second", "third" and the like in the terms are only used to distinguish the same or similar components for description, and should not be understood as emphasizing or implying the relative importance of the specific components.

[0034] In addition, in the description of the embodiments of the utility model, "several", "a plurality of", "several" represent at least 2. It can be 2, 3, 4, 5, 6, 7, 8, 9 and the like in any case, and even more than 9.

[0035] In addition, in the description of the technical scheme of the utility model, unless otherwise specified / limited / limited, the terms "arrangement", "installation", "connection", "connection", "arrangement", "arrangement", "arrangement" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, which can be welding, riveting, bolting, screwing and other commonly used connection means in the art. The connection can be mechanical connection, electrical connection or communication connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements.

[0036] Embodiment 1

[0037] As shown in Figures 1-4 An instrument air purge device, comprising:

[0038] An instrument air dry tank 9 is provided with a pressure gauge mounting interface 91 and a pressure gauge 92;

[0039] A connecting pipe 2, the connecting pipe 2 is detachably connected with a purge pipe 3, the purge pipe 3 comprises a hose section 31, and the connecting pipe 2 is provided with a valve 4;

[0040] A tee structure 1 is connected with the pressure gauge mounting interface 91, the pressure gauge 92 and the connecting pipe 2.

[0041] The instrument air blowing device of the embodiment is characterized in that a tee structure 1 is arranged at the position of a pressure gauge mounting interface 91 of an existing instrument air drying tank 9, the tee structure 1 enables a pressure gauge 92 to continue detecting and displaying the pressure in the instrument air drying tank 9, and an additional interface is connected with a connecting pipe 2, the connecting pipe 2 is connected with a blowing pipe 3, the end of the blowing pipe 3 is arranged near a radiator 10 of the instrument air drying tank 9, and the radiator 10 is blown and cleaned, compared with the existing blowing and cleaning of the radiator 10 using a separate gas supply device, the instrument air drying tank 9 is used as a gas source in the embodiment, and the separate gas supply device is replaced by a gas source near the radiator 10, the blowing efficiency is high, and the device is not prone to falling and damage, and the maintenance workload and cost are reduced.

[0042] In an optional embodiment, the blowing pipe 3 is a hose with a metal mesh layer, which has sufficient pressure bearing capacity and can be bent to adapt to the position of the radiator 10, thereby facilitating the blowing and cleaning of the radiator 10.

[0043] In an optional embodiment, the pressure gauge mounting interface 91 and the pressure gauge 92 are in line communication, and the connecting pipe 2 is perpendicular to the line connecting the pressure gauge mounting interface 91 and the pressure gauge 92. After the tee structure 1 is arranged between the pressure gauge mounting interface 91 and the pressure gauge 92, the pressure gauge 92 can remain in the original installation state and continue to detect and display the pressure in the instrument air drying tank 9, and meanwhile, the connecting pipe 2 is located between the pressure gauge 92 and the pressure gauge mounting interface 91, which does not affect the normal use of the pressure gauge 92 and facilitates the installation of the connecting pipe 2.

[0044] In an optional embodiment, the valve 4 includes a throttling stop valve, which can adjust the size of the gas flow according to the needs in use.

[0045] In one or more embodiments, the tee structure 1 includes:

[0046] a straight-through part 11 for connecting the pressure gauge mounting interface 91 and the pressure gauge 92, the straight-through part 11 is provided with a side through hole 12;

[0047] a sleeve 13 rotatably arranged on the straight-through part 11, and a sealing element 14 is embedded in the inner wall of the sleeve 13;

[0048] a branch pipe 15 vertically penetrating the sleeve 13, the branch pipe 15 can communicate with the side through hole 12, and the branch pipe 15 communicates with the connecting pipe 2. The tee structure 1 can adjust the extension direction of the connecting pipe 2 through the relative rotation of the sleeve 13 and the straight-through part 11, thereby facilitating the blowing and cleaning of different positions of the radiator 10.

[0049] In an optional embodiment, the straight-through part 11 and the sleeve 13 are both circular tube machining structural members, the side wall of the straight-through part 11 is provided with a side through hole 12, the axis of the side through hole 12 is perpendicular to the axis of the straight-through part 11, the sleeve 13 is provided with a branch pipe 15, the branch pipe 15 is perpendicular to the axis of the sleeve 13, during assembly, the sleeve 13 is coaxially nested with the straight-through part 11, is fixed by the snap spring arranged at both ends of the sleeve 13, the sleeve 13 and the straight-through part 11 are sealed by the embedded sealing ring, the sleeve 13 can rotate coaxially with the straight-through part 11, so that the branch pipe 15 and the side through hole 12 can be communicated.

[0050] In an optional embodiment, the straight-through part 11 is provided with a threaded joint at each end, the threaded joint is machined at each end of the straight-through part 11, or the threaded joint is connected to each end of the straight-through part 11.

[0051] In an optional embodiment, the threaded joint at one end of the straight-through part 11 is provided with an external thread, which can be threadedly connected with the pressure gauge mounting interface 91 on the existing instrument air drying tank 9, the threaded joint at the other end of the straight-through part 11 is provided with an internal thread, which can be threadedly connected with the pressure gauge 92, so as to realize the installation of the pressure gauge 92.

[0052] In one or more embodiments, the plurality of side through holes 12 are arranged around the straight-through part 11, so that the sleeve 13 can still maintain smooth airflow after rotation.

[0053] In an optional embodiment, the side through hole 12 is a circular hole, and the four side through holes 12 are uniformly distributed around the straight-through part 11 of the circular tube machining structural member.

[0054] In one or more embodiments, the connecting pipe 2 and the purge pipe 3 are connected by a quick connector 5, which facilitates the connection of the connecting pipe 2 and the purge pipe 3, and facilitates the connection of the purge pipe 3 according to the actual situation.

[0055] In one or more embodiments, the end of the purge pipe 3 away from the three-way structure 1 is provided with a hard pipe section 32, so that the tail end of the purge pipe 3 is convenient for hand holding, and the position during the blowing process is moved.

[0056] In an optional embodiment, the hard pipe section 32 is an iron pipe, a copper pipe or an aluminum pipe, and the hose section 31 of the purge pipe 3 can be connected with the hard pipe section 32 by a clamp or heat melting.

[0057] In one or more embodiments, the hard pipe section 32 is connected with a spray head 6, which can provide more suitable airflow for blowing.

[0058] In an optional embodiment, the spray head 6 is a single-hole spray head 6 or a multi-hole spray head 6, which can rectify the airflow through the spray head 6, so that the blowing and cleaning effect on the radiator 10 is better.

[0059] In one or more embodiments, the spray head 6 or the hard pipe section 32 is provided with a lighting mechanism 7, which can facilitate the observation of the cleaning condition of the position with insufficient light in the radiator 10.

[0060] In an optional embodiment, the lighting mechanism 7 is preferably a strong flashlight, the lighting mechanism 7 is fixed on the spray head 6 or the hard pipe section 32 through a conventional clamping member, and the lighting is realized through a self-provided power storage structure, so as to facilitate the observation of the staff during the blowing and cleaning process.

[0061] In one or more embodiments, the blowing pipe 3 is detachably connected with at least one bracket member 8, the bracket member 8 can be magnetically connected with the instrument air drying tank 9, so that the blowing pipe 3 can be conveniently placed during and after use, and the normal operation of the on-site equipment is avoided.

[0062] In an optional embodiment, the side of the bracket member 8 away from the blowing pipe 3 is provided with a disc member, the disc member is a rubber or metal structure, and is embedded with a magnet block, so that the bracket member 8 can be adsorbed on the instrument air drying tank 9, and the position limitation of the blowing pipe 3 connected with the bracket member 8 is realized.

[0063] In an optional embodiment, the bracket member 8 is clamped and connected with the blowing pipe 3.

[0064] In an optional embodiment, the bracket member 8 is provided with a clamping ring with a notch, the blowing pipe 3 is clamped and connected with the bracket member 8 through the clamping ring with the notch, and the blowing pipe 3 can be moved in and out from the notch of the clamping ring.

[0065] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An instrument air purge apparatus, characterized by, The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92). The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92). The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92). The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92).

2. An instrument air purge apparatus as defined in claim 1, wherein, The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92).

3. An instrument air purge apparatus as defined in claim 2, wherein, The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92). The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92). The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92). The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92).

4. An instrument air purge apparatus as defined in claim 3, wherein, The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92).

5. An instrument air purge apparatus as claimed in any one of claims 1 to 4, wherein, The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92).

6. An instrument air purge apparatus as claimed in claim 5, wherein, The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92).

7. An instrument air purge apparatus as defined in claim 5, wherein, The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92).

8. An instrument air purge apparatus as defined in claim 7, wherein, The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92).

9. An instrument air purge apparatus as defined in claim 8, wherein, The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92).

10. An instrument air purge apparatus as defined in claim 7, wherein, The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92). The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92). The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92). The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92). The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92). The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92). The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92). The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92). The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and the connecting pipe (2) is perpendicular to the line connecting the pressure gauge installation interface (91) and the pressure gauge (92). The utility model relates to a three-way structure (1) for connecting a pressure gauge installation interface (91), a pressure gauge (92) and a connecting pipe (2), wherein the pressure gauge installation interface (91) and the pressure gauge (92) are in line, and

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