Sealing device of metering pump

Abstract

The utility model relates to a metering pump sealing device which comprises a driving machine box, a pump body, a pump head and a diaphragm, a sealing assembly used for sealing is arranged between the pump body and the pump head, the sealing assembly comprises an outer shell, an end cover, a magnetic sealing pressing ring, a pull rod, a limiting spring, a fixing screw and a screw hole, and the end cover is located at one end of the outer shell. The magnetic sealing pressing ring is movably installed in the middle of the outer shell, the pull rod is arranged at the rear end of the magnetic sealing pressing ring, and the limiting spring is located on the outer wall of the pull rod. When the sealing assembly is used, the diaphragm can be installed in the outer shell, the diaphragm is pressed to the position of the end cover through the magnetic sealing pressing ring, the pump body and the pump head are connected through the outer shell, the situation that the pump body and the pump head are loosened after being used for a long time can be avoided, the sealing performance of the diaphragm in the using process can be guaranteed, and the service life of the diaphragm is prolonged. And when the diaphragm is aged and damaged, the diaphragm can be replaced by opening the end cover, so that the use is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to metering pump technical field especially a sealing device of metering pump. BACKGROUND

[0002] ‌Metering pump is also called as constant displacement pump or proportional pump, is widely used in satisfying various strict process flow demand, it is especially applicable to conveying flammable, explosive, corrosive, abrasive and slurry liquid, therefore plays an important role in chemical industry and petroleum chemical industry;

[0003] ‌The sealing diaphragm in metering pump is a kind of special dynamic seal, usually made of polytetrafluoroethylene, rubber and other materials, sealing diaphragm plays a key role in metering pump, it realizes liquid suction and discharge by reciprocating motion, simultaneously ensures the isolation between the fluid to be metered and driving lubricating mechanism, but the existing sealing diaphragm has certain inconvenience when using;

[0004] Firstly, the existing sealing diaphragm is usually installed between pump body and pump head when using, but pump body and pump head are prone to looseness after long-term use, which can cause the sealing property of sealing diaphragm to be poor and leakage to occur, and the sealing diaphragm will be aged after long-term use, so the existing sealing diaphragm is inconvenient to replace when using;

[0005] Therefore, we propose a sealing device of metering pump. CONTENT OF UTILITY MODEL

[0006] In view of the technical problem in the prior art that the existing sealing diaphragm is usually installed between pump body and pump head when using, but pump body and pump head are prone to looseness after long-term use, which can cause the sealing property of sealing diaphragm to be poor and leakage to occur, and the sealing diaphragm will be aged after long-term use, so the existing sealing diaphragm is inconvenient to replace when using, the utility model provides a sealing device of metering pump.

[0007] The technical scheme adopted by the utility model is: a sealing device of metering pump, including drive machine case, pump body, pump head and diaphragm, the pump body and the pump head between being provided with the sealing assembly for sealing, the sealing assembly includes shell body, end cover, magnetic sealing compression ring, pull rod, limit spring, fixed wire and wire hole, the end cover is located at one end of the shell body, the magnetic sealing compression ring is movably installed in the middle part of the shell body, the pull rod is arranged at the rear end of the magnetic sealing compression ring, the limit spring is located at the outer wall of the pull rod, the fixed wire is arranged on the outer wall of the shell body, and the wire hole is opened on the outer wall of the end cover.

[0008] Further, the upper end outer surface of the driving machine box is provided with a speed reducer, the upper end outer surface of the speed reducer is provided with a driving motor, the outer wall of the pump head is provided with a suction pipe and a discharge pipe, and the suction pipe is located below the discharge pipe.

[0009] Further, the middle part of the driving machine box is provided with a worm, a turbine and a guide rod, the worm is located on one side of the turbine, the guide rod is located on the other side of the turbine, and a connecting rod is arranged between the turbine and the guide rod.

[0010] Further, the middle part of the pump body is provided with a guide frame and a spring punch, the guide frame is located on one side of the spring punch, and the middle part of the pump head is provided with a blocking cavity.

[0011] Further, the limiting springs are fixedly connected with the magnetic sealing compression ring and the outer shell body, the pull rod penetrates to the rear end of the outer shell body, and the end cover is in the form of a ring.

[0012] Further, the worm and the turbine are engagedly connected, and the connecting rods are movably connected with the turbine and the guide rod.

[0013] Further, one end of the worm is connected with the output end of the speed reducer, and the guide rod penetrates the guide frame.

[0014] The utility model discloses the beneficial effect is:

[0015] 1, the sealing assembly can install the diaphragm to the outer shell body when using, and the diaphragm is pressed to the end cover through the magnetic sealing compression ring, and the outer shell body plays the connection between the pump body and the pump head, can avoid the looseness between the pump body and the pump head in long -term use, thereby can guarantee the sealing property of diaphragm when using, and when diaphragm is aged and damaged, can open the end cover and replace the diaphragm, and it is convenient when using.

[0016] 2, when the diaphragm is aged and damaged, the fixed wire can open the end cover, at this moment, the magnetic sealing compression ring can push out the diaphragm, and the diaphragm is replaced conveniently, and it is convenient when using. DRAWINGS

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

[0018] Figure 2 It is the overall structure section view of the utility model;

[0019] Figure 3 It is the internal structure diagram of the pump body of the utility model;

[0020] Figure 4 It is the structure diagram of the sealing assembly of the utility model.

[0021] 1, drive box; 2, pump body; 3, pump head; 4, sealing assembly; 41, outer shell; 42, end cover; 43, magnetic sealing compression ring; 44, pull rod; 45, limiting spring; 46, fixed wire; 47, wire hole; 5, speed reduction device; 6, drive motor; 7, suction pipe; 8, discharge pipe; 9, worm; 10, turbine; 11, guide rod; 12, connecting rod; 13, guide frame; 14, spring punch; 15, barrier cavity; 16, diaphragm. DETAILED DESCRIPTION

[0022] In the description of the present application, it should be explained that the terms "front", "upper", "lower", "left", "right", "vertical", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application.

[0023] In the description of the present application, it should be explained that unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] The following will be described in detail with reference to the accompanying drawings Figures 1-4 Further illustrate the present application.

[0025] In order to solve the problems in the background art, the present application proposes the following technical scheme: a sealing device of a metering pump.

[0026] In the specific technical scheme, the drive box 1, the pump body 2, the pump head 3 and the diaphragm 16 are arranged, the sealing assembly 4 for sealing is arranged between the pump body 2 and the pump head 3, the sealing assembly 4 comprises an outer shell 41, an end cover 42, a magnetic sealing compression ring 43, a pull rod 44, a limiting spring 45, a fixing wire 46 and a wire hole 47, the end cover 42 is located at one end of the outer shell 41, the magnetic sealing compression ring 43 is movably arranged at the middle part of the outer shell 41, the pull rod 44 is arranged at the rear end of the magnetic sealing compression ring 43, the limiting spring 45 is located on the outer wall of the pull rod 44, the fixing wire 46 is arranged on the outer wall of the outer shell 41, the wire hole 47 is arranged on the outer wall of the end cover 42, the sealing assembly 4 can install the diaphragm 16 into the outer shell 41 in use, and the diaphragm 16 is pressed to the end cover 42 through the magnetic sealing compression ring 43, and the magnetic sealing compression ring 43 can magnetically attract the end cover 42, the outer shell 41 is connected between the pump body 2 and the pump head 3, the loosening between the pump body 2 and the pump head 3 in long-term use can be avoided, so that the sealing property of the diaphragm 16 in use can be ensured, and when the diaphragm 16 is damaged due to aging, the end cover 42 can be opened to replace the diaphragm 16, which is convenient in use.

[0027] Further, the limiting springs 45 are fixedly connected with the magnetic sealing compression rings 43 and the outer shell 41, the pull rod 44 penetrates to the rear end of the outer shell 41, the end cover 42 has an annular structure, and the pull rod 44 can pull the magnetic sealing compression ring 43 to move backward in use.

[0028] Referring to FIGS. 1 to 8, Figure 1 , Figure 2 and Figure 3 , the upper end outer surface of the drive box 1 is provided with a speed reducer 5, the upper end outer surface of the speed reducer 5 is provided with a drive motor 6, the outer wall of the pump head 3 is provided with a suction pipe 7 and a discharge pipe 8, the suction pipe 7 is located below the discharge pipe 8, the middle part of the drive box 1 is provided with a worm 9, a turbine 10 and a guide rod 11, the worm 9 is located on one side of the turbine 10, the guide rod 11 is located on the other side of the turbine 10, a connecting rod 12 is arranged between the turbine 10 and the guide rod 11, the middle part of the pump body 2 is provided with a guide frame 13 and a spring punch 14, the guide frame 13 is located on one side of the spring punch 14, the middle part of the pump head 3 is provided with a barrier cavity 15, and the turbine 10 rotates under the drive of the worm 9 and drives the guide rod 11 to move back and forth through the connecting rod 12.

[0029] Further, the worm 9 and the turbine 10 are meshed and connected, the connecting rods 12 are movably connected with the turbine 10 and the guide rod 11, one end of the worm 9 is connected with the output end of the speed reducer 5, the guide rod 11 penetrates through the guide frame 13, and the guide rod 11 can stably move back and forth under the guidance of the guide frame 13 and impact the spring punch 14 when moving, so that the spring punch 14 impacts the diaphragm 16 to move forward to complete the suction operation.

[0030] In order for those skilled in the art to fully understand the technical solutions, the present application is made as follows:

[0031] In use, the pump body 2 is connected with the rear end of the outer shell 41, the diaphragm 16 is installed into the outer shell 41, and the diaphragm 16 is pressed against the end cover 42 through the magnetic sealing compression ring 43, and the magnetic sealing compression ring 43 can be magnetically attracted to the end cover 42, the end cover 42 is installed between the outer shell 41 through the fixing wire 46 and the wire hole 47, and a sealing ring is installed between the end cover 42 and the outer shell 41, one end of the end cover 42 is connected with the pump head 3, under the driving of the driving motor 6, the worm 9 drives the worm 9 to rotate, and under the rotation, the connecting rod 12 can drive the guide rod 11 to move back and forth, the guide rod 11 can stably move back and forth under the guidance of the guide frame 13, and the spring punch 14 can be impacted when moving, so that the spring punch 14 impacts the diaphragm 16 to move forward to complete the suction operation, the outer shell 41 is used as the connection between the pump body 2 and the pump head 3, so that the loosening between the pump body 2 and the pump head 3 can be avoided during long-term use, so that the sealing performance of the diaphragm 16 during use can be ensured, and when the diaphragm 16 is aged and damaged, the end cover 42 can be opened to replace the diaphragm 16, which is convenient in use.

[0032] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings, and the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here, and the contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0033] Although the embodiments of the utility model have been shown and described, the scope of the utility model is defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A seal arrangement for a metering pump, characterized in that Including drive case (1), pump body (2), pump head (3) and diaphragm (16), the pump body (2) and the pump head (3) are provided with sealing assembly (4) for sealing, the sealing assembly (4) includes shell (41), end cover (42), magnetic sealing compression ring (43), pull rod (44), limit spring (45), fixed wire (46) and wire hole (47), the end cover (42) is located at one end of the shell (41), the magnetic sealing compression ring (43) is movably installed in the middle of the shell (41), the pull rod (44) is arranged at the rear end of the magnetic sealing compression ring (43), the limit spring (45) is located on the outer wall of the pull rod (44), the fixed wire (46) is arranged on the outer wall of the shell (41), and the wire hole (47) is formed in the outer wall of the end cover (42).

2. A seal assembly for a metering pump as defined in claim 1, wherein The upper end outer surface of the drive case (1) is provided with a speed reducer (5), the upper end outer surface of the speed reducer (5) is provided with a driving motor (6), the outer wall of the pump head (3) is provided with a suction pipe (7) and a discharge pipe (8), and the suction pipe (7) is located below the discharge pipe (8).

3. A seal assembly for a metering pump as defined in claim 2, wherein, The middle part of the drive case (1) is provided with a worm (9), a turbine (10) and a guide rod (11), the worm (9) is located on one side of the turbine (10), the guide rod (11) is located on the other side of the turbine (10), and the turbine (10) and the guide rod (11) are provided with a connecting rod (12).

4. A seal assembly for a metering pump as defined in claim 3, wherein The middle part of the pump body (2) is provided with a guide frame (13) and a spring punch (14), the guide frame (13) is located on one side of the spring punch (14), and the middle part of the pump head (3) is provided with a barrier cavity (15).

5. A seal assembly for a metering pump as defined in claim 1, wherein, The limit spring (45) is fixedly connected with the magnetic sealing compression ring (43) and the shell (41), the pull rod (44) penetrates to the rear end of the shell (41), and the end cover (42) is annular structure.

6. A seal assembly for a metering pump as defined in claim 3, wherein, The worm (9) and the turbine (10) are engagedly connected, and the connecting rod (12) is movably connected with the turbine (10) and the guide rod (11).

7. A seal assembly for a metering pump as defined in claim 4, wherein One end of the worm (9) is connected with the output end of the speed reducer (5), and the guide rod (11) penetrates the guide frame (13).

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