A sampling head for indoor micro differential pressure sensor

Abstract

The present invention belongs to the technical field of pressure difference control in clean workshops, and specifically is a sampling head for an indoor micro-pressure difference sensor, comprising a sampling head body, wherein the body comprises a conducting part and a collecting part; the conducting part is threadedly connected to the collecting part, the conducting part is arranged above the ceiling in a room of a fan filter purification workshop, and the collecting part is arranged below the ceiling in the room of the fan filter purification workshop, and both the conducting part and the collecting part are made of stainless steel material; compared with a body made of plastic material, a body made of stainless steel material has the advantages of longer service life and is not prone to aging, dust generation and debris dropping; the sampling head adopts a multi-porous collecting design, which ensures the stability of the source point and has a stronger anti-interference ability, and is more beneficial to the manufacturer's benefits in terms of cost and later maintenance.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure difference control of clean workshops, in particular to a sampling head of an indoor micro-pressure difference sensor. Background Art

[0002] The micro differential pressure sensor is a product based on the mechanical micro differential pressure gauge and mechanical micro differential pressure function. The mechanical pointer micro differential pressure gauge only has the pointer display function. The mechanical differential pressure gauge can only realize the gas pressure change alarm or approximate control in an invisible environment. Mechanical products have rough measurement and mechanical transmission characteristics, while the gas micro differential pressure sensor uses an electronic chip to control the sensing core unit to realize digital visualization, high-precision measurement, big data processing and other characteristics to meet the signal acquisition needs of modern intelligent centralized control systems.

[0003] The micro-differential pressure sensor is connected to the sampling head through a hose, and the sampling head is fixed on the ceiling of the factory. The existing sampling head has many shortcomings and urgently needs to be improved. The traditional sampling head is made of plastic, and the cost is lower than that of the stainless steel sampling head. However, the plastic sampling head is easy to damage, and it will age and produce dust and debris after long-term use, affecting the cleanliness of the fan filter purification plant. The final indirect economic losses are higher than the cost of using stainless steel to produce sampling heads. It is not easy to use plastic sampling heads in fan filter purification plants. The sampling point at the end of the traditional sampling head is a single-hole collection point, which is greatly affected by the indoor airflow of the factory, resulting in inaccurate measurement. At the same time, the traditional sampling head is fixed by gluing, and the glue loses its viscosity after a long time, resulting in the sampling head being unreliable, and the gluing affects the appearance of the sampling head. The above shortcomings are not suitable for creating a clean working environment for the factory. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art and solve the problems described in the background art, the present invention proposes a sampling head for an indoor micro-pressure difference sensor.

[0005] The technical solution adopted by the present invention to solve its technical problem is: the indoor micro-pressure difference sensor sampling head described in the present invention includes a sampling head body, and the body includes a conduction part and a collection part; the conduction part is threadedly connected to the collection part, and the conduction part is arranged above the ceiling in the fan filter purification room, and the collection part is placed below the ceiling in the fan filter purification room, and the conduction part and the collection part are both made of stainless steel.

[0006] Preferably, the conduction part includes a hexagonal pagoda joint, an extension tube and a No. 1 adapter; the hexagonal pagoda joint is connected to a hose on an external micro-pressure differential sensor, and the hexagonal pagoda joint is threadedly connected to the extension tube; the extension tube is threadedly connected to the No. 1 adapter; the No. 1 adapter is threadedly connected to the collection part; the collection part includes a No. 2 adapter and a sampling tube; the No. 2 adapter is threadedly connected to the No. 1 adapter; the No. 2 adapter is threadedly connected to the sampling tube; the end face of the sampling tube is a closed end, and a through hole is provided on the closed end face of the sampling tube.

[0007] Preferably, the outer ring of the No. 1 adapter is fixedly connected to the ceiling in the fan filter purification plant room, and the main body is fixedly connected to the ceiling in the fan filter purification plant room through the No. 1 adapter.

[0008] Preferably, there are a plurality of through holes, one of which is opened in the middle of the closed end surface of the sampling tube, and the remaining through holes are opened on the closed end surface of the sampling tube around the middle through hole.

[0009] Preferably, the closed end of the sampling tube is a reducing surface cap, a through hole is provided on the large diameter end face of the closed end of the sampling tube, and the diameter of the large end face of the closed end on the sampling tube is twice the diameter of the small end face of the sampling tube threadedly connected to the No. 2 adapter.

[0010] Preferably, the large diameter end surface of the closed end of the sampling tube is a stainless steel skin with a thickness of 1-2MM.

[0011] Technical effects and advantages of the present invention:

[0012] Compared with the main body made of plastic, the main body made of stainless steel has the advantages of longer service life and is not easy to age, produce dust and drop chips. In addition, from the perspective of cost and later maintenance, using stainless steel to make the main body is more beneficial to the manufacturer's benefits.

[0013] The main body is fixed to the ceiling of the fan filter purification room by threading, that is, the outer ring of the No. 1 adapter is fixed to the ceiling, and the two ends of the No. 1 adapter are respectively threadedly connected to the extension pipe and the No. 2 adapter. This threaded connection method is more reliable than the gluing fixing method, and it is also easy for the installer to install and disassemble the main body.

[0014] By opening multiple through holes on the other end face of the sampling tube and increasing the number of sampling points of the sampling head, the impact of fluctuations caused by changes in the factory environment on the main body can be reduced, the sampling stability of the sampling head can be enhanced, and the measurement accuracy of the instrument can be improved. At the same time, the main body is threadedly fixed to the ceiling, the stability of the main body is improved, and the measurement accuracy of the main body is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below in conjunction with the accompanying drawings and implementation modes.

[0016] Figure 1 is a stereogram of the present invention;

[0017] Figure 2 yes Figure 1 Sectional view in the AA direction;

[0018] Figure 3 yes Figure 1 A partial enlarged view of point B in the middle;

[0019] In the figure: main body 1, conducting part 2, hexagonal pagoda joint 21, extension tube 22, No. 1 adapter 23, collection part 3, No. 2 adapter 31, sampling tube 32, through hole 321. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with the implementation methods.

[0021] like Figures 1 to 3 As shown, the indoor micro-pressure difference sensor sampling head described in the present invention includes a sampling head body 1, and the body 1 includes a conducting part 2 and a collecting part 3; the conducting part 2 is threadedly connected to the collecting part 3, the conducting part 2 is arranged above the ceiling in the fan filter purification room, and the collecting part 3 is placed below the ceiling in the fan filter purification room, and the conducting part 2 and the collecting part 3 are both made of stainless steel material; compared with the body 1 made of plastic material, the body 1 made of stainless steel material has the advantages of longer service life and is not easy to age, produce dust and drop chips, and considering the cost and later maintenance, using stainless steel material to make the body 1 is more beneficial to the manufacturer's benefits.

[0022] As a specific embodiment of the present invention, the conducting part 2 includes a hexagonal pagoda joint 21, an extension tube 22 and a No. 1 adapter 23; the hexagonal pagoda joint 21 is connected to the hose on the external micro-pressure differential sensor, and the hexagonal pagoda joint 21 is threadedly connected to the extension tube 22. The hexagonal pagoda joint 21 can use an internal thread with a nominal diameter of 15MM; the extension tube 22 is threadedly connected to the No. 1 adapter 23, and the extension tube 22 can use a double-headed external thread pipe with a nominal diameter of 20MM and a length of 400MM or 100MM, and the extension tube 22 can be selected according to the required installation length of the main body 1; the No. 1 adapter 23 is threadedly connected to the collection part 3, and the No. 1 adapter 23 can use a double-headed internal thread pipe with a length of 35mm and a nominal diameter of 20MM. The length of 3 is more adapted to the thickness of the existing ceiling, which is convenient for fixing the No. 1 adapter 23; the collecting part 3 includes the No. 2 adapter 31 and the sampling tube 32. The No. 2 adapter 31 is also preferably selected to be 35MM in length, and the No. 2 adapter 31 uses a double-headed outer thread and matches the inner thread of the No. 1 adapter 23; the No. 2 adapter 31 is threadedly connected to the No. 1 adapter 23; the No. 2 adapter 31 is threadedly connected to the sampling tube 32; the end face of the sampling tube 32 is a closed end, and a through hole 321 is provided on the closed end face of the sampling tube 32. The sampling tube 32 uses a 100MM pipe, and the end of the sampling tube 32 connected to the No. 2 adapter 31 is an inner thread and matches the No. 2 adapter 31, and the closed end of the sampling tube 32 is a reducing head with a diameter of 19MM to a diameter of 38MM.

[0023] As a specific embodiment of the present invention, the outer ring of the No. 1 adapter 23 is fixedly connected to the ceiling in the fan filter purification plant room, and the main body 1 is fixedly connected to the ceiling in the fan filter purification plant room through the No. 1 adapter 23; the main body 1 is fixed to the ceiling in the fan filter purification plant room by means of threads, that is, the outer ring of the No. 1 adapter 23 is fixedly connected to the ceiling, and the two ends of the No. 1 adapter 23 are respectively threadedly connected to the extension pipe 22 and the No. 2 adapter 31. This threaded connection method is more reliable than the gluing fixing method, and it is also easy for the installer to install and disassemble the main body 1.

[0024] As a specific embodiment of the present invention, there are multiple through holes 321, one of which is opened in the middle position of the other end face of the sampling tube 32, and the other through holes 321 are opened on the other end face of the sampling tube 32 around the middle through hole 321; by opening multiple through holes 321 on the other end face of the sampling tube 32, the number of sampling points of the sampling head is increased, which can reduce the impact of fluctuations caused by changes in the factory environment on the body 1, enhance the sampling stability of the sampling head, and improve the measurement accuracy of the instrument. At the same time, the body 1 is threadedly fixed to the ceiling, and the stability of the body 1 is improved, so that the measurement accuracy of the body 1 is further improved. At the same time, the sampling head adopts a multi-hole collection setting to ensure the stability of the source point and has a stronger anti-interference ability.

[0025] Working principle: first, fix the No. 1 adapter 23 to the designated measuring point on the ceiling of the fan filter purification plant, then connect the threaded end of the No. 1 adapter 23 facing above the ceiling to the extension tube 22, and connect the threaded end of the No. 1 adapter 23 facing below the ceiling to the No. 2 adapter 31, then connect the extension tube 22 to the hexagonal pagoda connector 21, the hexagonal pagoda connector 21 is connected to the external micro-pressure differential sensor through a hose, and the No. 2 adapter 31 is connected to the sampling tube 32. The above is the installation process of the main body 1, which is simple, quick and convenient to operate.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sampling head for an indoor micro differential pressure sensor, comprising a sampling head body (1), characterized in that: The body (1) comprises a conducting part (2) and a collecting part (3); the conducting part (2) is threadedly connected to the collecting part (3); the conducting part (2) is arranged above the ceiling in the fan filter purification room, and the collecting part (3) is arranged below the ceiling in the fan filter purification room, and the conducting part (2) and the collecting part (3) are both made of stainless steel; the conducting part (2) comprises a hexagonal pagoda joint (21), an extension tube (22) and a No. 1 adapter (23); the hexagonal pagoda joint (21) is connected to a hose on an external micro-pressure difference sensor, and the hexagonal pagoda joint (21) is threadedly connected to the extension tube (22); the extension tube (22) is threadedly connected to the No. 1 adapter (23); the No. 1 adapter (23) is threadedly connected to the collecting part (3); the The collection part (3) comprises a No. 2 adapter (31) and a sampling tube (32); the No. 2 adapter (31) is threadedly connected to the No. 1 adapter (23); the No. 2 adapter (31) is threadedly connected to the sampling tube (32); the end surface of the sampling tube (32) is a closed end, and a through hole (321) is provided on the closed end surface of the sampling tube (32); there are a plurality of through holes (321), one of which is provided at a middle position of the closed end surface of the sampling tube (32), and the remaining through holes (321) are provided on the closed end surface of the sampling tube (32) around the middle through hole (321); the outer ring of the No. 1 adapter (23) is fixedly connected to the ceiling of a fan filter purification plant room, and the body (1) is fixedly connected to the ceiling of a fan filter purification plant room through the No. 1 adapter (23).

2. The indoor micro differential pressure sensor sampling head according to claim 1, characterized in that: The closed end reducing surface cap of the sampling tube (32) has a through hole (321) formed on a large diameter end surface of the closed end of the sampling tube (32), and the diameter of the large end surface of the closed end of the sampling tube (32) is twice the diameter of the small end surface of the sampling tube (32) threadedly connected to the No. 2 adapter (31).

3. The indoor micro differential pressure sensor sampling head according to claim 1, characterized in that: The large-diameter end surface of the closed end of the sampling tube (32) is a stainless steel skin with a thickness of 1-2 mm.

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