Chemical pump with sealing compensation function

Abstract

The invention discloses a chemical pump with a sealing compensation function, and relates to the technical field of chemical pumps, the chemical pump comprises a pump base and a shell mounted at the top of the pump base, and a pump shaft is mounted on the inner side of the shell; the air pressure sealing mechanism is located in the shell and used for sealing the pump shaft, the air pressure sealing mechanism comprises a sealing shell fixedly connected to the interior of the shell, and the pump shaft penetrates through the interior of the sealing shell; the automatic air supply device is located at the end of the sealing shell and used for automatically supplying air to the interior of the air pressure sealing mechanism. According to the sealing device, the automatic air supply device is arranged to be matched with the air pressure sealing mechanism, air in the air inflation groove is pushed into the air bin for air supply, so that the elastic sealing ring is pressurized, the elastic sealing ring can be tightly attached to the pump shaft again to form sealing, and the sealing continuity is ensured; and the situation that equipment needs to be shut down for maintenance due to leakage at key time is avoided, so that the overall practicability of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of chemical pumps, in particular to a chemical pump with a sealing compensation function. Background Art

[0002] Chemical pumps refer to equipment used to transport liquids and increase their pressure in chemical production. They need to meet the special requirements of chemical processes, such as high and low temperature resistance, corrosion resistance, wear resistance, and reliable operation. Chemical pumps are mainly composed of several main components, including pump body, impeller, shaft, sealing device and drive device. Among them, the pump body is the outer shell of the pump, carrying other components; the impeller is the core component of the pump, responsible for converting mechanical energy into kinetic energy of the liquid; the shaft is the support rod of the impeller, used to transmit power; the sealing device is a key component to prevent pump leakage; the drive device (such as an electric motor) provides power to enable the pump to operate normally.

[0003] The existing chemical pump uses an elastic sealing ring to seal the shaft and the pump housing during use. However, the sealing ring is prone to wear during long-term use, resulting in sealing failure, which is prone to leakage and dangerous accidents. For this reason, we provide a chemical pump with a sealing compensation function to solve the above problem. Summary of the invention

[0004] The purpose of the present invention is to provide a chemical pump with a seal compensation function in order to solve the problem that the seal ring is easily worn out during long-term use, resulting in seal failure.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a chemical pump with a sealing compensation function, comprising: a pump seat and a shell installed on the top of the pump seat, a pump shaft is installed on the inner side of the shell; a pneumatic sealing mechanism, located inside the shell, for sealing the pump shaft, the pneumatic sealing mechanism includes a sealing shell fixedly connected to the inside of the shell, and the pump shaft passes through the inside of the sealing shell; an automatic air replenisher, located at the end of the sealing shell, for automatically replenishing air inside the pneumatic sealing mechanism; a back-suction assembly, located at the end of the sealing shell, for sucking leaked liquid.

[0006] As a further solution of the present invention: the pneumatic sealing mechanism also includes an air chamber opened on the inner side of the sealing shell, an elastic sealing ring is installed inside the air chamber, and the elastic sealing ring is attached to the outer wall of the pump shaft.

[0007] As a further solution of the present invention: the automatic air replenisher includes an air filling groove provided inside the shell, a groove communicating with the air filling groove is provided on the inner side of the sealing shell, a one-way solenoid valve is fixedly connected to the air inlet of the air storage, and one end of the one-way solenoid valve extends to the interior of the groove, a compensation sleeve is installed at the air inlet of the air filling groove, a first piston block, a second piston block and a third piston block are respectively installed inside the compensation sleeve, the third piston block and the second piston block are fixedly connected by a connecting rod, a warning component for alarm is provided on the outer wall of the compensation sleeve, and a connecting component for connection is provided between the first piston block and the second piston block.

[0008] As a further solution of the present invention: the automatic air replenisher also includes a U-shaped seat fixedly connected to the outer wall of the compensation sleeve, a driving motor is installed on one side of the U-shaped seat, the output end of the driving motor is connected to a one-way threaded screw, and one end of the one-way threaded screw penetrates through the inner side of the U-shaped seat and is rotatably connected to the U-shaped seat, the outer wall of the one-way threaded screw is threadedly connected to a sliding rod, and one end of the sliding rod penetrates through the inner side of the compensation sleeve and is fixedly connected to the third piston block, an oblique groove is opened on the inner side of the sealing shell, and a liquid flow sensor is installed on the inner side of the oblique groove.

[0009] As a further solution of the present invention: the warning component includes a conductive block fixedly connected to the outer wall of the compensation sleeve, the inner side of the sliding rod is fixedly connected with a first protective sleeve and a power connection block, and the power connection block is arranged on the inner side of the first protective sleeve, the inner side of the first protective sleeve is slidably connected with a second protective sleeve, a power spring is installed between the second protective sleeve and the first protective sleeve, four elastic soft membranes are fixedly connected to the inner sides of the ports of the second protective sleeve and the conductive block, and the four elastic soft membranes are distributed in a ring shape in the conductive block and the ports of the second protective sleeve, and an alarm light for alarm is also installed on the top of the pump seat, and the alarm light is electrically connected to the power connection block through a wire.

[0010] As a further solution of the present invention: the connecting assembly includes an auxiliary sleeve fixedly connected to the inner side of the second piston block, a movable rod is slidably connected to the inner side of the auxiliary sleeve, and one end of the movable rod is fixedly connected to the first piston block, and a connecting spring is installed between the movable rod and the second piston block.

[0011] As a further solution of the present invention: the connecting assembly also includes a spherical rod slidably connected to the inner side of the compensation sleeve, and one end of the spherical rod penetrates to the inner side of the movable rod, and the other end of the spherical rod extends to the outside of the compensation sleeve, the outer wall of the spherical rod is fixedly connected with a circular ring, and an auxiliary spring is installed between the circular ring and the compensation sleeve, and a trapezoidal groove communicating with the inflation groove is opened on the inner side of the sealing shell.

[0012] As a further solution of the present invention: the back-suction assembly includes a suction shell fixedly connected to the end of the sealing shell, a suction groove is provided on the inner side of the suction shell, a guide hole communicating with the inclined groove is provided on the inner side of the sealing shell, and the guide hole is communicated with the suction groove, and a piston ring is installed on the inner side of the suction groove.

[0013] As a further solution of the present invention: the suction back assembly also includes a second spur rack fixedly connected to the bottom of the sliding rod, a fixed seat is fixedly connected to the inner side of the U-shaped seat, a spur gear meshing with the second spur rack is rotatably connected to the inner side of the fixed seat, a first spur rack is meshed with the bottom of the spur gear, a power rod is fixedly connected to the outer walls on both sides of the first spur rack, and one end of the power rod passes through the interior of the suction groove and is fixedly connected to the piston ring.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up the automatic air replenisher and the air pressure sealing mechanism to cooperate with each other, the gas in the inflation tank is pushed into the air chamber for air replenishment, so as to pressurize the elastic sealing ring, so that the elastic sealing ring can be close to the pump shaft again to form a seal, so as to ensure the continuity of the seal, so that the device will not be shut down for maintenance due to leakage at critical times, thereby improving the overall practicality of the device; 2. By setting the coordination of the first piston block and other parts, when the first piston block moves to the groove port, the liquid flow sensor also detects that the liquid flows through, and the sliding rod continues to move into the inside of the compensation sleeve under the drive of the drive motor and the one-way threaded screw, so that the second piston block can replenish the gas inside the compensation sleeve into the gas chamber; Since the first piston block, the second piston block and the third piston block are arranged inside the compensation sleeve, three air replenishment operations can be performed. When the third air replenishment operation is needed, the first piston block has been against the other end of the inflation groove, and the second piston block is located inside the groove. After the spherical rod is separated from the inclined surface at the end of the trapezoidal groove and moves to the inside of the trapezoidal groove, the spherical rod is moved out from the inside of the movable rod under the action of the auxiliary spring and no longer fixes the compensation sleeve, so that the third piston block moves to perform the third air replenishment process. The third piston block can push the second piston block to slide relative to the first piston block to perform the air replenishment operation. The first piston block and the second piston block in the initial state can be fixed by the spherical rod, so as to ensure the stability of the first and second air replenishment. 3. By setting up the cooperation of the conductive block and other parts, a conductive sheet for conducting electricity is installed inside the conductive block, and the conductive sheet is electrically connected to the external power supply through a wire. When the second piston block completes the second air replenishment, the second protective sleeve is against the end of the conductive block. Then, when the third piston block performs the third air replenishment, the first protective sleeve slides on the outer wall of the second protective sleeve. At the same time, the electrical block pushes the elastic soft film open and inserts it into the conductive block to contact the conductive sheet inside the conductive block, so that the alarm light can be connected to the power supply to alarm, thereby reminding the staff that the device needs to be repaired, thereby avoiding leakage of the device during use at critical times, thereby improving the overall practicality of the device; 4. By setting the cooperation of parts such as the piston ring, when the sliding rod moves toward the inside of the compensation sleeve, it drives the second spur rack to move synchronously, thereby driving the spur gear to shift the first spur rack to move in the opposite direction, so as to pull the piston ring through the power rod to suck the inside of the inclined groove, so as to suck the leaked liquid in the inclined groove into the suction groove to avoid excessive liquid causing the liquid flow sensor to misdetect. At the same time, when the liquid flow sensor does not detect the flow of liquid, the three air replenishment operations inside the compensation sleeve are intermittent, so that after the elastic sealing ring has formed a seal during the first air replenishment process, the first air replenishment process has not been completely used up. At this time, the drive motor will continue to run until the first The air replenishment operation is completed. During this process, the suction formed by the piston ring can generate negative pressure inside the chute, so that the elastic sealing ring can completely form liquid suction inside the pump seat without sealing, so that the liquid flow sensor can detect the liquid again, and the air replenishment operation will be performed again to avoid incomplete sealing. When the liquid flow sensor does not detect the flow of liquid, the suction action of the piston ring forms negative pressure inside the chute, further assisting the elastic sealing ring to form a sealing effect, thereby providing additional sealing support when the initial air replenishment is insufficient. The combination of air replenishment and leakage management design avoids the equipment from being shut down for maintenance due to sealing failure at critical times, thereby improving the reliability and efficiency of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a structural schematic diagram of the present invention; Figure 2 is a cross-sectional view of a housing of the present invention; Figure 3 is a cross-sectional view of a sealing shell of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 It is a schematic diagram of the internal structure of the compensation sleeve of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle; Figure 7 It is a cross-sectional view of the conductive block and the first protective sleeve of the present invention; Figure 8 It is a schematic diagram of the connection between the conductive block and the power connection block of the present invention.

[0016] In the figure: 1, pump seat; 2, housing; 3, pump shaft; 4, sealing shell; 5, suction shell; 6, compensation sleeve; 7, sliding rod; 8, U-shaped seat; 9, elastic sealing ring; 10, air chamber; 11, piston ring; 12, inclined groove; 13, suction groove; 14, guide hole; 15, liquid flow sensor; 16, one-way threaded screw; 17, charging groove; 18, first piston block; 19, driving motor; 20, spherical rod; 21, trapezoidal groove; 22, second piston block ; 23. The third piston block; 24. The conductive block; 25. The first protective sleeve; 26. The first straight rack; 27. The second straight rack; 28. The fixed seat; 29. ​​The spur gear; 30. The connecting rod; 31. The movable rod; 32. The auxiliary sleeve; 33. The connecting spring; 34. The circular ring; 35. The auxiliary spring; 36. The power block; 37. The second protective sleeve; 38. The power spring; 39. The elastic soft membrane; 40. The groove; 41. The power rod; 42. The one-way solenoid valve. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0019] Example 1 See also Figures 1 to 8, the present embodiment provides a chemical pump with a sealing compensation function, comprising: a pump seat 1 and a shell 2 installed on the top of the pump seat 1, a pump shaft 3 is installed on the inner side of the shell 2; a pneumatic sealing mechanism, located inside the shell 2, for sealing the pump shaft 3, the pneumatic sealing mechanism comprises a sealing shell 4 fixedly connected to the inside of the shell 2, and the pump shaft 3 passes through the inside of the sealing shell 4; an automatic air replenisher, located at the end of the sealing shell 4, for automatically replenishing air inside the pneumatic sealing mechanism, the pneumatic sealing mechanism also comprises an air warehouse 10 opened inside the sealing shell 4, an elastic sealing ring 9 is installed inside the air warehouse 10, and the elastic sealing ring 9 is attached to the outer wall of the pump shaft 3, the automatic air replenisher comprises an air filling groove 17 opened inside the shell 2, a groove 40 communicating with the air filling groove 17 is opened on the inner side of the sealing shell 4, a one-way solenoid valve 42 is fixedly connected to the air inlet of the air warehouse 10, and the one-way solenoid valve 42 is fixedly connected to the air inlet of the air warehouse 10, and the one-way solenoid valve 42 is fixedly connected to the air inlet of the air warehouse 10. One end of the magnetic valve 42 extends to the inside of the groove 40, and a compensation sleeve 6 is installed at the air inlet of the inflation groove 17. The first piston block 18, the second piston block 22 and the third piston block 23 are respectively installed inside the compensation sleeve 6. The third piston block 23 is fixedly connected to the second piston block 22 through a connecting rod 30. The automatic air replenisher also includes a U-shaped seat 8 fixedly connected to the outer wall of the compensation sleeve 6, and a driving motor 19 is installed on one side of the U-shaped seat 8. The output end of the driving motor 19 is connected to a one-way threaded screw 16, and one end of the one-way threaded screw 16 penetrates the inner side of the U-shaped seat 8 and is rotatably connected to the U-shaped seat 8. The outer wall of the one-way threaded screw 16 is threadedly connected with a sliding rod 7, and one end of the sliding rod 7 penetrates the inner side of the compensation sleeve 6 and is fixedly connected to the third piston block 23. An inclined groove 12 is opened on the inner side of the sealing shell 4, and a liquid flow sensor 15 is installed on the inner side of the inclined groove 12; First, an air supply valve penetrating to the outside is installed inside the air chamber 10. After the sealing shell 4 is installed inside the housing 2, the elastic sealing ring 9 is attached to the outer wall of the pump shaft 3. The air supply valve can be used to supply air to the air chamber 10, so that the elastic sealing ring 9 is pressed against the outer wall of the pump shaft 3 on all sides, thereby forming a seal between the pump shaft 3 and the sealing shell 4. The air pressure extrusion and compression can ensure that the contact between the elastic sealing ring 9 and the pump shaft 3 is closer, thereby improving the sealing performance. When the elastic sealing ring 9 is worn out during long-term use, the liquid in the housing 2 leaks directly from the gap between the pump shaft 3 and the elastic sealing ring 9 into the inclined groove 12. When the liquid flow sensor 15 detects the flow of liquid, the signal can be transmitted to the external PLC controller. The PLC controller controls the drive motor 19 to start intermittently, and the one-way solenoid valve 42 is in an open state. The output end of the drive motor 19 drives the one-way threaded screw 16 to rotate, thereby driving the sliding rod 7 to drive the first piston block 18 to move into the inflation groove 17, thereby pushing the gas in the inflation groove 17 into the air chamber 10 for replenishing gas, thereby pressurizing the elastic sealing ring 9, so that the elastic sealing ring 9 can be close to the pump shaft 3 again to form a seal, thereby ensuring the continuity of the seal, so that the device will not be shut down for maintenance due to leakage at critical times, thereby improving the overall practicality of the device.

[0020] Example 2 The outer wall of the compensation sleeve 6 is provided with a warning component for alarm, and the warning component includes a conductive block 24 fixedly connected to the outer wall of the compensation sleeve 6, and the inner side of the sliding rod 7 is fixedly connected with a first protective sleeve 25 and a power connection block 36, and the power connection block 36 is arranged on the inner side of the first protective sleeve 25, and the inner side of the first protective sleeve 25 is slidably connected with a second protective sleeve 37, and a power spring 38 is installed between the second protective sleeve 37 and the first protective sleeve 25, and the second protective sleeve 37 and the inner side of the port of the conductive block 24 are both fixedly connected with four elastic soft membranes 39, and the four elastic soft membranes 39 are distributed in a ring shape in the conductive block 24 and the second protective sleeve 37 ports, and an alarm light for alarm is also installed on the top of the pump seat 1, and the alarm light is electrically connected to the power connection block 36 through a wire; A conductive sheet for conducting electricity is installed inside the conductive block 24, and the conductive sheet is electrically connected to an external power supply through a wire. When the second piston block 22 completes the second air replenishment, the second protective sleeve 37 is against the end of the conductive block 24. Then, when the third piston block 23 performs the third air replenishment, the first protective sleeve 25 slides on the outer wall of the second protective sleeve 37. At the same time, the power connection block 36 pushes open the elastic soft membrane 39 and inserts it into the conductive block 24 to contact the conductive sheet inside the conductive block 24, so that the alarm light can be connected to the power supply to alarm, thereby reminding the staff that the device needs maintenance, thereby avoiding leakage of the device during use at critical times, thereby improving the overall practicality of the device.

[0021] Example 3 A connecting assembly for connection is provided between the first piston block 18 and the second piston block 22, and the connecting assembly includes an auxiliary sleeve 32 fixedly connected to the inner side of the second piston block 22, a movable rod 31 is slidably connected to the inner side of the auxiliary sleeve 32, and one end of the movable rod 31 is fixedly connected to the first piston block 18, a connecting spring 33 is installed between the movable rod 31 and the second piston block 22, the connecting assembly also includes a spherical rod 20 slidably connected to the inner side of the compensation sleeve 6, and one end of the spherical rod 20 penetrates to the inner side of the movable rod 31, and the other end of the spherical rod 20 extends to the outside of the compensation sleeve 6, a circular ring 34 is fixedly connected to the outer wall of the spherical rod 20, and an auxiliary spring 35 is installed between the circular ring 34 and the compensation sleeve 6, and a trapezoidal groove 21 communicating with the inflation groove 17 is opened on the inner side of the sealing shell 4; When the first piston block 18 moves to the end of the groove 40, the liquid flow sensor 15 also detects that the liquid flows through, and the sliding rod 7 continues to move into the inside of the compensation sleeve 6 under the drive of the drive motor 19 and the one-way threaded screw 16, so that the second piston block 22 can replenish the gas inside the compensation sleeve 6 into the gas chamber 10; Since the first piston block 18, the second piston block 22 and the third piston block 23 are arranged inside the compensation sleeve 6, three air replenishing operations can be performed. When the third air replenishing operation is needed, the first piston block 18 has been against the other end of the inflation groove 17, and the second piston block 22 is located on the inner side of the groove 40. After the spherical rod 20 separates from the inclined surface at the end of the trapezoidal groove 21 and moves to the inner side of the trapezoidal groove 21, the spherical rod 20 is moved out from the inner side of the movable rod 31 under the action of the auxiliary spring 35 and no longer fixes the compensation sleeve 6, so that the third piston block 23 moves to perform the third air replenishing process. The third piston block 23 can push the second piston block 22 to slide relative to the first piston block 18 to perform the air replenishing operation. The first piston block 18 and the second piston block 22 in the initial state can be fixed by the spherical rod 20, so as to ensure the stability of the first and second air replenishing.

[0022] Example 4 The back-suction assembly is located at the end of the sealing shell 4 and is used to suck the leaked liquid. The back-suction assembly includes a suction shell 5 fixedly connected to the end of the sealing shell 4, a suction groove 13 is provided on the inner side of the suction shell 5, a guide hole 14 communicating with the inclined groove 12 is provided on the inner side of the sealing shell 4, and the guide hole 14 is communicated with the suction groove 13, and a piston ring 11 is installed on the inner side of the suction groove 13, and the back-suction assembly also includes a second spur rack 27 fixedly connected to the bottom of the sliding rod 7, a fixed seat 28 is fixedly connected to the inner side of the U-shaped seat 8, and a spur gear 29 meshing with the second spur rack 27 is rotatably connected to the inner side of the fixed seat 28, and a first spur rack 26 is meshed at the bottom of the spur gear 29, and a power rod 41 is fixedly connected to the outer walls of both sides of the first spur rack 26, and one end of the power rod 41 penetrates into the interior of the suction groove 13 and is fixedly connected to the piston ring 11; When the sliding rod 7 moves toward the inside of the compensation sleeve 6, it drives the second spur rack 27 to move synchronously, thereby driving the spur gear 29 to shift the first spur rack 26 to move in the opposite direction, thereby pulling the piston ring 11 through the power rod 41 to suck the inside of the inclined groove 12, thereby sucking the leaked liquid in the inclined groove 12 into the suction groove 13 to avoid excessive liquid causing erroneous detection of the liquid flow sensor 15. At the same time, when the liquid flow sensor 15 does not detect the flow of liquid, the three air replenishment operations inside the compensation sleeve 6 are intermittent, so that after the elastic sealing ring 9 has formed a seal during the first air replenishment process, the first air replenishment process has not been completely used up. At this time, the drive motor 19 will continue to run until the first air replenishment process. The operation is completed. During this process, the suction formed by the piston ring 11 can generate negative pressure inside the chute 12, so that the elastic sealing ring 9 can completely form suction on the liquid inside the pump seat 1 without sealing, so that the liquid flow sensor 15 can detect the liquid again, and the air replenishment operation will be performed again to avoid incomplete sealing. When the liquid flow sensor 15 does not detect the flow of liquid, the suction action of the piston ring 11 forms a negative pressure inside the chute 12, further assisting the elastic sealing ring 9 to form a sealing effect, thereby providing additional sealing support when the initial air replenishment is insufficient. The combination of air replenishment and leakage management design avoids the equipment from being shut down for maintenance due to sealing failure at critical times, thereby improving the reliability and efficiency of equipment operation.

[0023] What is described above 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 chemical pump with sealing compensation function, characterized in that: include: A pump seat (1) and a shell (2) mounted on the top of the pump seat (1), wherein a pump shaft (3) is mounted on the inner side of the shell (2); A pneumatic sealing mechanism, located inside the housing (2) and used for sealing the pump shaft (3), the pneumatic sealing mechanism comprising a sealing shell (4) fixedly connected to the inside of the housing (2), and the pump shaft (3) passing through the inside of the sealing shell (4); An automatic air replenisher, located at the end of the sealing shell (4), and used for automatically replenishing air inside the air pressure sealing mechanism; The suction back assembly is located at the end of the sealing shell (4) and is used to suck the leaked liquid.

2. A chemical pump with sealing compensation function according to claim 1, characterized in that: The pneumatic sealing mechanism further comprises an air chamber (10) opened inside the sealing shell (4), an elastic sealing ring (9) being installed inside the air chamber (10), and the elastic sealing ring (9) being fitted onto the outer wall of the pump shaft (3).

3. A chemical pump with sealing compensation function according to claim 2, characterized in that: The automatic air replenisher comprises an air filling groove (17) provided inside the housing (2); a groove (40) communicating with the air filling groove (17) is provided on the inner side of the sealing shell (4); a one-way solenoid valve (42) is fixedly connected to the air inlet of the gas chamber (10), and one end of the one-way solenoid valve (42) extends into the interior of the groove (40); a compensation sleeve (6) is installed at the air inlet of the air filling groove (17); a first piston block (18), a second piston block (22) and a third piston block (23) are respectively installed inside the compensation sleeve (6); the third piston block (23) and the second piston block (22) are fixedly connected via a connecting rod (30); a warning component for alarming is provided on the outer wall of the compensation sleeve (6); and a connecting component for connection is provided between the first piston block (18) and the second piston block (22).

4. A chemical pump with sealing compensation function according to claim 3, characterized in that: The automatic air replenisher further comprises a U-shaped seat (8) fixedly connected to the outer wall of the compensation sleeve (6), a driving motor (19) being installed on one side of the U-shaped seat (8), an output end of the driving motor (19) being connected to a one-way threaded screw (16), one end of which penetrates through the inner side of the U-shaped seat (8) and is rotatably connected to the U-shaped seat (8), a sliding rod (7) being threadedly connected to the outer wall of the one-way threaded screw (16), one end of which penetrates through the inner side of the compensation sleeve (6) and is fixedly connected to the third piston block (23), an inclined groove (12) being provided on the inner side of the sealing shell (4), and a liquid flow sensor (15) being installed on the inner side of the inclined groove (12).

5. A chemical pump with sealing compensation function according to claim 4, characterized in that: The warning component comprises a conductive block (24) fixedly connected to the outer wall of the compensation sleeve (6); a first protective sleeve (25) and a power connection block (36) are fixedly connected to the inner side of the sliding rod (7); the power connection block (36) is arranged on the inner side of the first protective sleeve (25); a second protective sleeve (37) is slidably connected to the inner side of the first protective sleeve (25); a power spring (38) is installed between the second protective sleeve (37) and the first protective sleeve (25); four elastic soft membranes (39) are fixedly connected to the inner side of the port of the second protective sleeve (37) and the conductive block (24); and the four elastic soft membranes (39) are distributed in an annular shape in the ports of the conductive block (24) and the second protective sleeve (37); and an alarm light for alarming is also installed on the top of the pump seat (1); the alarm light is electrically connected to the power connection block (36) through a wire.

6. A chemical pump with sealing compensation function according to claim 3, characterized in that: The connecting assembly comprises an auxiliary sleeve (32) fixedly connected to the inner side of the second piston block (22); a movable rod (31) is slidably connected to the inner side of the auxiliary sleeve (32); one end of the movable rod (31) is fixedly connected to the first piston block (18); and a connecting spring (33) is installed between the movable rod (31) and the second piston block (22).

7. A chemical pump with sealing compensation function according to claim 6, characterized in that: The connection assembly further comprises a spherical rod (20) slidably connected to the inner side of the compensation sleeve (6), one end of the spherical rod (20) penetrates the inner side of the movable rod (31), and the other end of the spherical rod (20) extends to the outside of the compensation sleeve (6), a circular ring (34) is fixedly connected to the outer wall of the spherical rod (20), and an auxiliary spring (35) is installed between the circular ring (34) and the compensation sleeve (6), and a trapezoidal groove (21) communicating with the inflation groove (17) is provided on the inner side of the sealing shell (4).

8. A chemical pump with seal compensation function according to claim 4, characterized in that: The back-suction assembly comprises a suction shell (5) fixedly connected to the end of the sealing shell (4), a suction groove (13) is provided on the inner side of the suction shell (5), a guide hole (14) communicating with the inclined groove (12) is provided on the inner side of the sealing shell (4), and the guide hole (14) is communicated with the suction groove (13), and a piston ring (11) is installed on the inner side of the suction groove (13).

9. A chemical pump with sealing compensation function according to claim 8, characterized in that: The suction back assembly also includes a second spur rack (27) fixedly connected to the bottom of the sliding rod (7); a fixed seat (28) is fixedly connected to the inner side of the U-shaped seat (8); a spur gear (29) meshing with the second spur rack (27) is rotatably connected to the inner side of the fixed seat (28); a first spur rack (26) is meshed at the bottom of the spur gear (29); a power rod (41) is fixedly connected to the outer walls on both sides of the first spur rack (26); and one end of the power rod (41) penetrates into the interior of the suction groove (13) and is fixedly connected to the piston ring (11).

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