Temperature measuring device for cooling water small-diameter pipeline of piston compressor

Abstract

The utility model discloses a piston type compressor cooling water small pipe diameter pipeline temperature measuring device which comprises a water inlet pipe and a water outlet pipe, a four-way pipe joint is connected between the water inlet pipe and the water outlet pipe, the bottom of the four-way pipe joint is connected with a pipe cap, and the top of the four-way pipe joint is provided with a flange connection conversion piece. A temperature measuring instrument is arranged above the flange connection conversion piece, the bottom of the temperature measuring instrument extends into the four-way pipe connector, and a temperature measuring protection sleeve is arranged on the outer side of the temperature measuring instrument. Meanwhile, the compatibility with other standard pipe fittings is improved, and field installation and maintenance are facilitated; the application of pipelines with different small pipe diameters is considered in the design of the device, the sizes of all small water pipes are almost covered, the requirements of different cooling water systems are met, and the application range of the device is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a temperature measuring device for a small-diameter pipeline of cooling water of a piston compressor. Background Art

[0002] A piston compressor is a compressor that relies on the reciprocating motion of a piston to pressurize and transport gas. It is driven by an electric motor, and the circular motion of the motor is converted into the reciprocating linear motion of the piston through components such as a crank, a connecting rod, and a crosshead. The piston continuously compresses and transports the process gas in the cylinder. The piston is equipped with a sealing ring group for sealing and a supporting ring group for supporting the horizontal movement of the piston. These ring groups contact and rub against the inner wall of the cylinder as the piston reciprocates, generating friction heat. In order to prevent the heat generated by friction from damaging the ring group, affecting the efficiency and life of the compressor, and causing dangerous accidents, it is generally necessary to design a cooling water cavity inside the cylinder. The cooling water flows through the water cavity, taking away the friction heat generated by the ring group, thereby protecting the unit. Generally, a temperature monitoring instrument is installed on the water pipeline flowing out of the cylinder to observe the temperature rise and cooling effect of the cooling water. Because the cylinder needs a small amount of cooling water, the cooling water pipeline will be relatively small, and the nominal diameter of the pipeline needs to be ≤DN40 (diameter ≤48.3mm, the smallest diameter is only 21.3mm). It is very difficult and unreasonable to directly install a temperature measuring instrument on such a small pipeline. It will reduce the flow area of ​​the waterway and affect the flow of cooling water; the measurement is not accurate; similarly, directly installing the temperature measuring element on the thin tube will have the problem of top-heavy, affecting the vibration resistance of the pipeline, and easily causing the pipeline to break, and the structure is not coordinated and not beautiful;

[0003] In order to solve this problem, the usual practice is to expand the small pipeline to a DN100 steel pipe through a reducing pipe fitting, use a three-way pipe joint or open a hole on the thick pipeline, weld a temperature measuring protective sleeve or weld a butt flange, and then install a temperature measuring instrument;

[0004] Although the pipeline of the above-mentioned prior art has good fluidity and accurate measurement, it has many parts, large volume, high cost, and long temperature measuring elements, which affect the inspection and maintenance space around the compressor. Similarly, because it is designed by expanding the diameter from a thin pipeline, the design of thin limbs and large heads is still not beautiful, and when the material of the temperature measuring protection sleeve is stainless steel as required by the customer, it must be welded with dissimilar steels of carbon steel water pipelines, resulting in poor welding performance and inconvenience in use. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a temperature measuring device for a small-diameter cooling water pipeline of a piston compressor, which solves the problems of the prior temperature measuring device having many parts, a large volume and poor versatility.

[0006] The purpose of the present invention is to minimize the size of the device, reduce costs, simplify the structure, facilitate disassembly and maintenance, and enhance the functionality and versatility of the device without affecting the basic principle of temperature monitoring. To achieve the above purposes, the utility model is implemented through the following technical solutions: a small-diameter pipeline temperature measuring device for cooling water of a piston compressor, comprising an inlet pipe and an outlet pipe, a four-way pipe joint is connected between the inlet pipe and the outlet pipe, a pipe cap is connected to the bottom of the four-way pipe joint, and a flange connection conversion piece is installed on the top, a temperature measuring instrument is provided above the flange connection conversion piece, the bottom of the temperature measuring instrument extends into the interior of the four-way pipe joint, a temperature measuring protection sleeve is provided on the outside of the temperature measuring instrument, and the temperature measuring protection sleeve and the flange connection conversion piece are detachably connected.

[0007] Preferably, the four-way pipe joints and pipe caps used are standard models in GB / T12459 "Steel Butt-Welding Seamless Pipe Fittings", the temperature instrument end and the pipe cap end are fixed sizes, the nominal diameter is DN40, the flange connection conversion piece size is specially designed and can also be manufactured as a standard part, and the inlet and outlet on both sides can be selected from five levels of DN15-DN20-DN25-DN32-DN40 according to the diameter of the water pipeline.

[0008] Preferably, the four-way pipe joint is connected to the water inlet pipe, the water outlet pipe, the pipe cap and the flange connection conversion piece by full penetration butt welding.

[0009] Preferably, a flange connection surface is provided on the temperature measuring protection sleeve, and the flange connection surface is connected to the flange connection conversion piece by bolts, and a nut is screwed on the bottom of the bolt.

[0010] Preferably, a sealing gasket is provided between the temperature measuring protection sleeve and the flange connection conversion member.

[0011] Beneficial Effects

[0012] The utility model provides a temperature measuring device for a small-diameter pipeline of cooling water of a piston compressor, which has the following beneficial effects:

[0013] The diameter of the temperature measuring part is fixed to DN40, and standard four-way pipe joints are selected on both sides according to the actual diameter of the water pipeline. The temperature measuring device can be installed without increasing the diameter of the connected water pipeline. In addition, the addition of the pipe cap structure not only balances the weight of the temperature measuring instrument to a certain extent, but also effectively compensates for the water flow area occupied by the temperature protection sleeve being measured;

[0014] Small size, compact structure, strong vibration resistance;

[0015] Application parts are basically standard parts or solidified parts that can be mass-produced, safe, reliable and low-cost;

[0016] The use of standard four-way pipe joints and pipe caps ensures the standardized production of the device, reduces manufacturing costs, and improves compatibility with other standard pipe fittings, making it easier to install and maintain on site;

[0017] The device design takes into account the application of different small-diameter pipelines and provides five interface options from DN15 to DN40, covering almost all sizes of small water pipes. It can also be used for temperature measuring protective sleeves of different materials and temperature measuring instruments with different connection forms, meeting the needs of different cooling water systems and improving the application range of the device.

[0018] The flange connection conversion piece and the temperature measuring protection sleeve are connected by bolts, nuts and gaskets, which makes the installation and removal of the temperature measuring device simple and quick, and the appearance is beautiful, which is convenient for regular calibration, maintenance or replacement of temperature measuring elements, and improves the maintenance efficiency of the equipment;

[0019] The full penetration butt welding connection method avoids leakage or other safety problems caused by welding defects, and improves the operating safety and service life of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] In the figure: 1. water inlet pipe; 2. water outlet pipe; 3. four-way pipe joint; 4. pipe cap; 5. flange connection conversion piece; 6. temperature measuring instrument; 7. temperature measuring protection sleeve; 8. bolts; 9. nuts; 10. sealing gasket. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 The utility model provides a technical solution: a temperature measuring device for a small-diameter pipeline of cooling water of a piston compressor, comprising an inlet pipe 1 and an outlet pipe, a four-way pipe joint 3 is connected between the inlet pipe 1 and the outlet pipe, a pipe cap 4 is connected to the bottom of the four-way pipe joint 3, a flange connection conversion piece 5 is installed on the top, a temperature measuring instrument 6 is arranged above the flange connection conversion piece 5, the bottom of the temperature measuring instrument 6 extends into the inside of the four-way pipe joint 3, a temperature measuring protection sleeve 7 is arranged on the outside of the temperature measuring instrument 6, and the temperature measuring protection sleeve 7 and the flange connection conversion piece 5 are detachably connected.

[0024] By adopting the above technical solution, a standard four-way pipe joint 3 is used, and the two sides are selected to weld the same diameter interface according to the actual water pipeline size. The other two sides are welded at one end with a standard pipe cap 4 to increase the circulation area and balance the temperature measurement weight. A special flange connection conversion piece 5 is welded on the other side. Bolts 8, nuts 9, and gaskets are used to connect the integrated temperature measurement protection sleeve 7, and then the temperature measuring instrument 6 is installed to complete the installation. The four-way pipe joint 3 and pipe cap 4 used are standard models in GB / T12459 "Steel Butt Welding Seamless Pipe Fittings". The temperature instrument end and the pipe cap 4 end are fixed sizes, and the nominal diameter is DN40. The size of the flange connection conversion piece 5 is specially solidified and designed, and can also be manufactured as a standard part. The inlet and outlet on the other two sides can choose DN15-DN20-DN25-DN32-DN40 according to the diameter of the water pipeline, which basically covers the diameter of all small water pipes. The selection of standard parts meets the use, reduces costs, and increases reliability and interchangeability. The other end adopts a flange connection, which avoids the non-detachability of the temperature measuring protection sleeve 7 caused by direct welding on the pipeline, and also enriches the diversity and versatility of the material of the temperature measuring protection sleeve 7 to meet different user requirements. At the same time, it also avoids the weak quality of direct welding of stainless steel sleeves and carbon steel water pipelines with dissimilar steels.

[0025] The present embodiment is further configured such that the four-way pipe joint 3 is connected to the water inlet pipe 1 , the water outlet pipe, the pipe cap 4 and the flange connection conversion piece 5 by full penetration butt welding.

[0026] By adopting the above technical solution, one end of the flange connection conversion part 5 is a DN40 welding interface, which is fully penetrated butt-welded to the four-way joint. The pipe cap 4, the water inlet pipe 1, and the water outlet pipe and the four-way joint are also welded in this way. At the same time, the welding quality can be ensured by X-ray and magnetic powder non-destructive monitoring methods.

[0027] This embodiment is further configured such that a flange connection surface is provided on the temperature measuring protection sleeve 7 , and the flange connection surface is connected to the flange connection conversion member 5 via a bolt 8 , and a nut 9 is screwed onto the bottom of the bolt 8 .

[0028] By adopting the above technical solution and flange connection, the non-detachability of the temperature measuring protection sleeve 7 caused by direct welding on the pipeline is avoided, and the diversity and versatility of the material of the temperature measuring protection sleeve 7 to meet different user requirements are enriched. At the same time, the weak quality of direct welding of stainless steel sleeves and carbon steel water pipelines with different steels is avoided. The temperature measuring protection sleeve 7 is designed as an integrated flange structure and can be directly installed on the flange connection conversion part 5 using standard bolts 8, nuts 9, and sealing gaskets 10, which simplifies the connection structure and enhances stability. The external connection threads can be processed into threaded connection forms of various sizes according to customer needs, both metric and imperial threads are acceptable.

[0029] This embodiment is further configured such that a sealing gasket 10 is provided between the temperature measuring protection sleeve 7 and the flange connection conversion member 5 .

[0030] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the field. The following mainly introduces the working principle and process.

[0031] Embodiment: The four-way pipe joint 3 is used to connect the water inlet pipe 1 and the water outlet pipe 2, increase the flow area of ​​the temperature measurement area, and balance the weight of the temperature measuring instrument 6. The pipe cap 4 closes one side to form a closed temperature measurement space. The flange connection conversion piece 5 is used to connect the temperature measuring instrument 6 and the four-way pipe joint 3, which is convenient for installing and disassembling the temperature measuring instrument 6. The temperature measuring instrument 6 goes deep into the four-way pipe joint 3 to achieve accurate temperature measurement. The protective sleeve 7 wraps the temperature measuring instrument 6 to protect it from the external environment. The four-way pipe joint 3 and each connecting piece adopt full penetration welding to ensure the connection strength and sealing. At the same time, the welding quality can be inspected by non-destructive testing methods such as X-rays and magnetic powder. The temperature measuring protective sleeve 7 is connected to the flange connection conversion piece 5 by flanges, bolts 8, nuts 9 and sealing gaskets 10 to achieve detachability and facilitate maintenance and replacement.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A temperature measuring device for a small-diameter cooling water pipeline of a piston compressor, comprising a water inlet pipe (1) and a water outlet pipe (2), characterized in that: A four-way pipe joint (3) is connected between the water inlet pipe (1) and the water outlet pipe (2); a pipe cap (4) is connected to the bottom of the four-way pipe joint (3); a flange connection conversion piece (5) is installed on the top; a temperature measuring instrument (6) is arranged above the flange connection conversion piece (5); the bottom of the temperature measuring instrument (6) extends into the interior of the four-way pipe joint (3); a temperature measuring protection sleeve (7) is arranged on the outside of the temperature measuring instrument (6); and the temperature measuring protection sleeve (7) and the flange connection conversion piece (5) are detachably connected.

2. A temperature measuring device for a small-diameter cooling water pipeline of a piston compressor according to claim 1, characterized in that: The four-way pipe joint (3) is connected to the water inlet pipe (1), the water outlet pipe (2), the pipe cap (4) and the flange connection conversion piece (5) by full penetration butt welding.

3. A temperature measuring device for a small-diameter cooling water pipeline of a piston compressor according to claim 2, characterized in that: The temperature measuring protection sleeve (7) is provided with a flange connection surface, and the flange connection surface is connected to the flange connection conversion member (5) via a bolt (8), and a nut (9) is screwed on the bottom of the bolt (8).

4. A temperature measuring device for a small-diameter cooling water pipeline of a piston compressor according to claim 3, characterized in that: A sealing gasket (10) is provided between the temperature measuring protection sleeve (7) and the flange connection conversion component (5).

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