Metering pump installation sealing structure

Abstract

The utility model relates to a metering pump mounting and sealing structure, which belongs to the field of metering pumps and comprises a metering pump body, an auxiliary mechanism is arranged outside the metering pump body, and the auxiliary mechanism comprises an input shaft fixedly mounted on the left surface of the metering pump body, a limiting box mounted on the peripheral wall of the metering pump body and a limiting mechanism arranged in the limiting box. A sealing ring, a limiting block fixedly mounted on the outer peripheral wall of the sealing ring, a first connecting rod fixedly mounted on the outer peripheral wall of the limiting block, a torsional spring rotationally mounted in the limiting box, a second connecting rod fixedly mounted on the outer peripheral wall of the torsional spring and two mounting plates fixedly mounted on the outer peripheral wall of the limiting box are connected in the limiting box in a sliding manner. According to the metering pump mounting and sealing structure, the torsional spring, the first connecting rod and the limiting block are arranged, so that after the sealing ring is abraded, the torsional spring rotates to drive the first connecting rod to drive the limiting block to limit the sealing ring, and the elastic force of the torsional spring is prevented from being exceeded.

Description

Technical Field

[0001] The utility model relates to the technical field of metering pumps, in particular to a metering pump installation sealing structure. Background Art

[0002] Metering pumps, also known as proportional pumps, can easily and accurately change the stroke of the plunger by adjusting the eccentric distance of the eccentric wheel when the amount of liquid delivered is changed. Metering pumps are mainly composed of three parts: power drive, fluid delivery and adjustment control. The stability accuracy is usually required to be no more than 1%. As modern industry develops towards automated operation and remote automatic control, the advantages of metering pumps with strong matching and wide adaptability to media have become particularly prominent.

[0003] Chinese patent CN210423713U discloses an improved metering pump sealing structure, which belongs to the field of metering pumps, including a metering pump body, a self-tightening disc spring, a pressure cover, a skeleton oil seal, a sealing ring, a sealing seat, a sealing end cover and a leakage detection tube, wherein the metering pump body includes an input shaft, a mounting hole is opened on one side of the metering pump body, one end of the input shaft passes through the mounting hole and extends to the outside of the mounting hole, the self-tightening disc spring, the pressure cover, the skeleton oil seal, the sealing ring, the sealing seat and the sealing end cover are all sleeved on the outside of the input shaft, one end of the sealing end cover is located inside the mounting hole, and the sealing end cover is fixedly connected to the metering pump body, and the self-tightening disc spring, the sealing ring and the sealing seat are all located in the inner ring of the sealing ring end cover. The utility model has a reasonable structure, a clever design, and simple operation, and solves the problem that the metering pump sealing structure in the prior art is expensive and not conducive to popularization and use, and is easy to popularize and use.

[0004] The above patent has the following problem: when the wear force exceeds the limit of the self-tightening disc spring, the reset limit effect cannot be activated. Therefore, a metering pump installation sealing structure is proposed to solve the above problem. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a metering pump installation sealing structure, which has the advantage of good limiting effect and solves the problem that the reset limit effect cannot be activated when the wear force exceeds the limit of the self-tightening disc spring.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a metering pump installation sealing structure, comprising a metering pump body, wherein an auxiliary mechanism is provided outside the metering pump body;

[0007] The auxiliary mechanism includes an input shaft fixedly mounted on the left surface of the metering pump body, a limit box mounted on the outer peripheral wall of the metering pump body, and a limit mechanism arranged in the limit box;

[0008] The limit box is slidably connected with a sealing ring, a limit block fixedly installed on the outer peripheral wall of the sealing ring, a first connecting rod fixedly installed on the outer peripheral wall of the limit block, a torsion spring rotatably installed in the limit box, a second connecting rod fixedly installed on the outer peripheral wall of the torsion spring, two mounting plates fixedly installed on the outer peripheral wall of the limit box, a screw rotatably connected between the two mounting plates, and a slider threadedly installed on the outer peripheral wall of the screw.

[0009] Furthermore, the fixing plates are fixedly mounted on the front and rear surfaces of the limit box, and the bolts are threadedly mounted on the upper surface of the fixing plates and penetrate through the fixing plates.

[0010] Furthermore, the left surface and the right surface of the limit box are both provided with movable grooves adapted to the input shaft, and the input shaft passes through the limit box.

[0011] Furthermore, there are two sealing rings, and the two sealing rings are respectively located on the outer peripheral wall of the input shaft.

[0012] Furthermore, the outer peripheral wall of the first connecting rod is fixedly connected to the torsion spring, and the angle between the first connecting rod and the second connecting rod is one hundred and eighty degrees.

[0013] Furthermore, the outer peripheral wall of the second connecting rod is fixedly connected to the sliding block, and the limit box is composed of an upper box body and a lower box body.

[0014] Compared with the prior art, the utility model provides a metering pump installation sealing structure, which has the following beneficial effects:

[0015] 1. The metering pump is installed with a sealing structure. By arranging a torsion spring, a first connecting rod and a limit block, after the sealing ring is worn, the torsion spring can rotate to drive the first connecting rod to drive the limit block to limit the sealing ring. In order to prevent the elastic force of the torsion spring from exceeding the elastic force of the torsion spring, the user can choose to adjust the position of the slider according to the wear condition, thereby driving the torsion spring to rotate and drive the first connecting rod to adjust the position, thereby solving the problem that when the wear force exceeds the limit of the self-tightening disc spring, the reset limit effect cannot be activated.

[0016] 2. The metering pump is installed with a sealing structure, and by setting a fixing plate and bolts, the limit box can be disassembled when the sealing ring needs to be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a structural sectional view of the limit box of the utility model;

[0019] Figure 3 It is a structural side view of the limit box of the utility model.

[0020] In the figure: 1. metering pump body; 2. input shaft; 3. limit box; 4. limit mechanism; 41. sealing ring; 42. limit block; 43. first connecting rod; 44. torsion spring; 45. second connecting rod; 46. mounting plate; 47. screw; 48. slider; 5. fixing plate; 6. bolt; 7. movable groove. DETAILED DESCRIPTION

[0021] 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.

[0022] Embodiment 1:

[0023] See also Figure 1-3 A metering pump installation sealing structure in this embodiment includes a metering pump body 1. An auxiliary mechanism is provided outside the metering pump body 1. The auxiliary mechanism includes an input shaft 2 fixedly installed on the left surface of the metering pump body 1, a limit box 3 installed on the outer peripheral wall of the metering pump body 1, and a limit mechanism 4 arranged in the limit box 3.

[0024] A sealing ring 41 is slidably connected inside the limit box 3, a limit block 42 is fixedly installed on the outer peripheral wall of the sealing ring 41, a first connecting rod 43 is fixedly installed on the outer peripheral wall of the limit block 42, a torsion spring 44 is rotatably installed in the limit box 3, a second connecting rod 45 is fixedly installed on the outer peripheral wall of the torsion spring 44, two mounting plates 46 are fixedly installed on the outer peripheral wall of the limit box 3, a screw 47 is rotatably connected between the two mounting plates 46, and a slider 48 is threadedly installed on the outer peripheral wall of the screw 47.

[0025] In this embodiment, a fixing plate 5 is fixedly installed on the front and rear surfaces of the limit box 3, and a bolt 6 is threadedly installed on the upper surface of the fixing plate 5 and penetrates the fixing plate 5. By setting the bolt 6 and the fixing plate 5, the installation and disassembly of the limit box 3 are facilitated, so that it is convenient to disassemble when maintenance is required.

[0026] In this embodiment, movable grooves 7 adapted to the input shaft 2 are provided on the left and right surfaces of the limit box 3. The input shaft 2 passes through the limit box 3. By limiting the position of the input shaft 2, the input shaft 2 can be protected by the sealing ring 41, thereby preventing the input shaft 2 from being damaged during use.

[0027] In this embodiment, there are two sealing rings 41 , which are respectively located on the outer peripheral wall of the input shaft 2 . By setting the position and number of the sealing rings 41 , the protection effect is increased.

[0028] In this embodiment, the outer wall of the first connecting rod 43 is fixedly connected to the torsion spring 44. By setting the first connecting rod 43 and the torsion spring 44, the first connecting rod 43 can be driven to move by the reset effect of the torsion spring 44. The angle between the first connecting rod 43 and the second connecting rod 45 is one hundred and eighty degrees.

[0029] Embodiment 2:

[0030] See also Figure 1-3 On the basis of the first embodiment, the outer peripheral wall of the second connecting rod 45 is fixedly connected to the slider 48, and the limit box 3 is composed of an upper box body and a lower box body.

[0031] The working principle of the above embodiment is:

[0032] When the sealing ring 41 is worn, the sealing ring 41 drives the limit block 42 to move toward the direction of the sealing ring 41, the limit block 42 drives the first connecting rod 43 to rotate, and the first connecting rod 43 drives the torsion spring 44 to rotate. In order to prevent the wear force from exceeding the limit of the torsion spring 44, the user rotates the screw 47 after a period of time, the screw 47 drives the slider 48 to slide, and the slider 48 drives the second connecting rod 45 to rotate when sliding, and the second connecting rod 45 drives the torsion spring 44 to rotate when rotating. When the user needs to replace the sealing ring 41, the disassembly is completed by removing the bolt 6, thereby completing the entire operation process.

[0033] The above beneficial effects are:

[0034] By providing a torsion spring, a first connecting rod and a limit block, after the sealing ring is worn, the torsion spring can be rotated to drive the first connecting rod to drive the limit block to limit the sealing ring. In order to prevent the elastic force of the torsion spring from exceeding the elastic force, the user can choose to adjust the position of the slider according to the wear condition, thereby driving the torsion spring to rotate and drive the first connecting rod to adjust the position, thereby solving the problem that the reset limit effect cannot be activated when the wear force exceeds the limit of the self-tightening disc spring. By providing a fixing plate and bolts, the limit box can be disassembled when the sealing ring needs to be replaced.

[0035] 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 elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] Although the 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 metering pump installation sealing structure, comprising a metering pump body (1), characterized in that: The metering pump body (1) is provided with an auxiliary mechanism outside; The auxiliary mechanism comprises an input shaft (2) fixedly mounted on the left surface of the metering pump body (1), a limit box (3) mounted on the outer peripheral wall of the metering pump body (1), and a limit mechanism (4) arranged in the limit box (3); The limit box (3) is slidably connected with a sealing ring (41), a limit block (42) fixedly mounted on the outer peripheral wall of the sealing ring (41), a first connecting rod (43) fixedly mounted on the outer peripheral wall of the limit block (42), a torsion spring (44) rotatably mounted in the limit box (3), a second connecting rod (45) fixedly mounted on the outer peripheral wall of the torsion spring (44), two mounting plates (46) fixedly mounted on the outer peripheral wall of the limit box (3), a screw rod (47) rotatably connected between the two mounting plates (46), and a slider (48) threadedly mounted on the outer peripheral wall of the screw rod (47).

2. A metering pump installation sealing structure according to claim 1, characterized in that: The fixing plate (5) is fixedly mounted on the front surface and the rear surface of the limit box (3), and the bolts (6) are threadedly mounted on the upper surface of the fixing plate (5) and penetrate through the fixing plate (5).

3. A metering pump installation sealing structure according to claim 1, characterized in that: The left and right surfaces of the limit box (3) are both provided with movable grooves (7) adapted to the input shaft (2), and the input shaft (2) passes through the limit box (3).

4. A metering pump installation sealing structure according to claim 1, characterized in that: The number of the sealing rings (41) is two, and the two sealing rings (41) are respectively located on the outer peripheral wall of the input shaft (2).

5. A metering pump installation sealing structure according to claim 1, characterized in that: The outer peripheral wall of the first connecting rod (43) is fixedly connected to the torsion spring (44), and the angle between the first connecting rod (43) and the second connecting rod (45) is one hundred and eighty degrees.

6. A metering pump installation sealing structure according to claim 1, characterized in that: The outer peripheral wall of the second connecting rod (45) is fixedly connected to the sliding block (48), and the limit box (3) is composed of an upper box body and a lower box body.

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