Thermal compensation device of three-cylinder single-action high-temperature diaphragm pump

Abstract

The utility model belongs to the technical field of three-cylinder single-action high-temperature diaphragm pumps, and particularly relates to a thermal compensation device of a three-cylinder single-action high-temperature diaphragm pump. The utility model comprises an outer sleeve structure, and is characterized in that an inner pipe capable of freely sliding is arranged in the outer sleeve structure; a check ring is arranged between the inner pipe and the outer sleeve structure, and a sealing ring is further arranged between the inner pipe and the outer sleeve. According to the utility model, the axial linear displacement of the heat insulation device and the cooling device of the high-temperature diaphragm pump caused by thermal stress deformation can be timely and fully compensated, the thermal stress is effectively reduced, and the service life of equipment is favorably prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of three-cylinder single-acting high-temperature diaphragm pumps, and in particular relates to a thermal compensation device for a three-cylinder single-acting high-temperature diaphragm pump. Background Art

[0002] Conventional diaphragm pumps convey media at temperatures below 125°C. Limited by rubber materials, high-temperature media can easily cause accelerated aging of rubber parts such as diaphragms, making it impossible to guarantee the service life of the diaphragm, and affecting the overall operation of the diaphragm pump. To solve the problem of conveying high-temperature media, high-temperature diaphragm pumps generally use insulation devices that can prevent high-temperature media from contacting the diaphragm and cooling devices that absorb excess heat to ensure that the temperature in the low-temperature zone is stable, so that the diaphragm always operates in a safe temperature environment.

[0003] The heat insulation device and the cooling device are long straight tube structures. Under the influence of high-temperature media, linear thermal expansion will occur. If the thermal expansion cannot be compensated, large thermal stress will be generated in the linear direction, causing thermal deformation or even failure of the diaphragm pump device.

[0004] The traditional thermal expansion compensation device is a bellows. Due to the thin-wall structure of the bellows, the working conditions are relatively sensitive. In addition, the diaphragm pump medium often contains small solid particles, which are easy to accumulate at the tip of the bellows, thereby limiting the deformation of the bellows and causing rupture and failure. The safety of use is not ideal.

[0005] Therefore, a device with simple structure, convenient processing and reliable performance is urgently needed on site to solve the problem of linear thermal expansion of the compensation pipeline in the hydraulic end system of the three-cylinder single-acting high-temperature diaphragm pump. Utility Model Content

[0006] The purpose of the utility model is to provide a device with simple structure, convenient processing and reliable performance, which can solve the problem of linear thermal expansion of the compensation pipeline of the hydraulic end system of the three-cylinder single-acting high-temperature diaphragm pump.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions.

[0008] A three-cylinder single-acting high-temperature diaphragm pump thermal compensation device includes a jacket structure, characterized in that: an inner tube that can slide freely is arranged in the jacket structure; a retaining ring is arranged between the inner tube and the jacket structure, and a sealing ring is also arranged between the inner tube and the jacket structure.

[0009] Furthermore, the outer sleeve structure is formed by connecting an outer sleeve flange and an outer sleeve; the inner diameter of the outer sleeve flange is smaller than the inner diameter of the outer sleeve, the part of the inner tube extending into the outer sleeve is provided with a head whose outer diameter matches the inner diameter of the outer sleeve, the side of the inner tube head adjacent to the outer sleeve is provided with an annular groove for setting a retaining ring, and the side of the inner tube head adjacent to the outer sleeve is also provided with an annular groove for setting a sealing ring; the outer sleeve flange and the outer sleeve are connected by the cooperation of studs and nuts.

[0010] Furthermore, a winding gasket is arranged between the outer sleeve flange and the outer sleeve.

[0011] Furthermore, spring washers are provided on both sides of the stud.

[0012] Furthermore, one end of the inner tube away from the outer jacket structure is connected with a cooling device, a heat insulation device and a tee body in sequence; one end of the outer jacket structure away from the inner tube is connected with a bent pipe body and a diaphragm chamber in sequence; the tee body is arranged on the foundation through a tee bracket; the bent pipe body is arranged on the foundation through a bent pipe base.

[0013] The beneficial effects of the utility model.

[0014] The utility model can timely and fully compensate for the axial linear displacement of the heat insulation device and the cooling device of the high-temperature diaphragm pump caused by thermal stress deformation, effectively reduce the thermal stress, and is beneficial to prolonging the service life of the equipment.

[0015] The main structure is made of flanges and straight pipes processed and welded. Flanges and straight pipes can be made of standard parts or processed and produced using various profiles and plates. They are easy to purchase, have a short procurement and production cycle, and are low in cost.

[0016] The double sealing structure with two sets of retaining rings and sealing rings has good self-sealing performance and high reliability. It is suitable for working conditions of equipment with high sealing requirements and long telescopic stroke.

[0017] The compensation device is arranged after the cooling device, which reduces the working temperature of the compensation device, is beneficial to the service life of the seal, and improves the working reliability.

[0018] The compensation device is arranged in front of the elbow and can be installed and disassembled together with the elbow, which reduces the hoisting work in the production of diaphragm pumps, improves the convenience of replacement, and is more conducive to reducing maintenance costs and spare parts replacement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structural arrangement position of the utility model.

[0020] Figure 2 It is a structural schematic diagram of the utility model.

[0021] Explanation of the serial numbers in the figure: 1-inner tube, 2-outer tube structure, 3-stud, 4-nut, 5-spring washer, 6-wound gasket, 7-retaining ring, 8-sealing ring, 21-outer tube flange, 22-outer tube, 91-cooling device, 92-insulating device, 93-tee body, 94-elbow body, 95-diaphragm chamber, 96-tee bracket, 97-elbow base, 98-foundation. DETAILED DESCRIPTION

[0022] like Figure 1-2 The utility model comprises a jacket structure 2, characterized in that: a freely slidable inner tube 1 is arranged inside the jacket structure 2; a retaining ring 7 is arranged between the inner tube 1 and the jacket structure 2, and a sealing ring 8 is also arranged between the inner tube 1 and the jacket structure 2.

[0023] Furthermore, the outer sleeve structure 2 is formed by connecting an outer sleeve flange 21 and an outer sleeve 22; the inner diameter of the outer sleeve flange 21 is smaller than the inner diameter of the outer sleeve 22, and the part of the inner tube 1 extending into the outer sleeve 22 is provided with a head whose outer diameter matches the inner diameter of the outer sleeve 22, and the side of the head of the inner tube 1 adjacent to the outer sleeve 22 is provided with an annular groove for setting a retaining ring 7, and the side of the head of the inner tube 1 adjacent to the outer sleeve 22 is also provided with an annular groove for setting a sealing ring 8; the outer sleeve flange 21 and the outer sleeve 22 are connected by the cooperation of the stud 3 and the nut 4.

[0024] Furthermore, a winding gasket 6 is provided between the outer sleeve flange 21 and the outer sleeve 22 .

[0025] Furthermore, spring washers 5 are provided on both sides of the stud 3 .

[0026] Furthermore, the end of the inner tube 1 away from the outer jacket structure 2 is connected with a cooling device 91, a heat insulation device 92 and a tee body 93 in sequence; the end of the outer jacket structure 2 away from the inner tube 1 is connected with a bent pipe body 94 and a diaphragm chamber 95 in sequence; the tee body 93 is arranged on a foundation 98 through a tee bracket 96; the bent pipe body 94 is arranged on a foundation 98 through a bent pipe base 97.

[0027] Specifically, the inner tube 1 is connected to the outer shell structure 2 , and adopts the principle and structure of dynamic sealing, so that the inner tube 1 can slide freely in the outer shell structure 2 .

[0028] In order to ensure the sealing performance at high pressure, a retaining ring 7 and a sealing ring 8 are used at the sealing point and double sealing is used to solve the problem of difficult sealing of the sleeve compensator.

[0029] The flange sealing part of the utility model adopts studs 3, nuts 4 and metal wound gaskets 6, and spring washers 5 are arranged on both sides of the studs 3 to increase the sealing performance of the flange.

[0030] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the implementation mode of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.

Claims

1. A thermal compensation device for a triplex single-acting high-temperature diaphragm pump, comprising a jacket structure (2), characterized in that: The outer jacket structure (2) is provided with an inner tube (1) which can slide freely; a retaining ring (7) is provided between the inner tube (1) and the outer jacket structure (2); and a sealing ring (8) is also provided between the inner tube (1) and the outer jacket structure (2).

2. A triplex single-acting high-temperature diaphragm pump thermal compensation device according to claim 1, characterized in that: The outer sleeve structure (2) is formed by connecting an outer sleeve flange (21) and an outer sleeve (22); the inner diameter of the outer sleeve flange (21) is smaller than the inner diameter of the outer sleeve (22); the portion of the inner tube (1) extending into the outer sleeve (22) is provided with a head whose outer diameter matches the inner diameter of the outer sleeve (22); a ring groove for arranging a retaining ring (7) is provided on the side of the head of the inner tube (1) adjacent to the outer sleeve (22); and a ring groove for arranging a sealing ring (8) is also provided on the side of the head of the inner tube (1) adjacent to the outer sleeve (22); the outer sleeve flange (21) and the outer sleeve (22) are connected by matching studs (3) and nuts (4).

3. A triplex single-acting high-temperature diaphragm pump thermal compensation device according to claim 2, characterized in that: A winding gasket (6) is arranged between the outer sleeve flange (21) and the outer sleeve (22).

4. A triplex single-acting high-temperature diaphragm pump thermal compensation device according to claim 2, characterized in that: Spring washers (5) are arranged on both sides of the stud (3).

5. A triplex single-acting high-temperature diaphragm pump thermal compensation device according to claim 1, characterized in that: The end of the inner tube (1) away from the outer shell structure (2) is connected in sequence to a cooling device (91), a heat insulating device (92) and a three-way body (93); the end of the outer shell structure (2) away from the inner tube (1) is connected in sequence to a bent tube body (94) and a diaphragm chamber (95); the three-way body (93) is arranged on a foundation (98) via a three-way bracket (96); and the bent tube body (94) is arranged on a foundation (98) via a bent tube base (97).

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