Automatic pressurization anti-blocking system of limestone slurry delivery pump

Abstract

The utility model discloses an automatic pressurization anti-blocking system of a limestone slurry delivery pump, and relates to the technical field of limestone slurry processing. The conveying device comprises a conveying shell, an anti-blocking assembly is arranged at the feeding end of the conveying shell, and a pressurizing assembly is further arranged at the discharging end of the conveying shell. The anti-blocking assembly comprises an anti-blocking shell located on one side of the conveying shell, a collecting box is clamped to the bottom of the anti-blocking shell, a rotating shaft is rotationally connected into the anti-blocking shell, and the outer wall of the rotating shaft is sleeved with a sleeve. Large-particle sediments in limestone slurry are filtered through the rotating plate and the screen holes, the filtered sediments are collected through the collecting box, the problem that the existing anti-blocking capacity is poor is solved, meanwhile, the first piston plate drives the second piston plate to reciprocate, and the anti-blocking capacity of the limestone slurry is improved. And the pressure in the lower shell is adjusted through a second piston plate, so that the limestone slurry is pressurized, and the problem that the limestone slurry is inconvenient to pressurize in the prior art is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of limestone slurry processing, in particular to an automatic pressurization and anti-blocking system of a limestone slurry delivery pump. Background Art

[0002] Limestone slurry is a suspended liquid made from limestone ore through processes such as crushing, grinding, water immersion, and mixing. It is a commonly used building material with the characteristics of durability, high temperature resistance, and corrosion resistance. In the processing of limestone slurry, a delivery pump is usually used to transport the limestone slurry. However, since limestone slurry is a suspended liquid, in order to avoid clogging of the delivery pump, the delivery pump is usually connected to an anti-clogging system.

[0003] The document with the existing publication number CN211424001U discloses an anti-clogging structure for a limestone slurry delivery pump, comprising a water pool and a pump body, wherein the pump body is connected to the water pool via a water pump inlet pipe, the water inlet of the water pump inlet pipe being arranged in the water pool, the water inlet of the water pump inlet pipe being a bell-shaped one, wherein the bell-shaped opening faces downward;

[0004] However, it still has the following disadvantages in actual use:

[0005] 1. The anti-clogging structure of the limestone slurry delivery pump mentioned above has a pump body connected to the water pool through a water pump inlet pipe. The water inlet of the water pump inlet pipe is arranged in the water pool. The water inlet of the water pump inlet pipe is a bell-mouth type. The bell-mouth type water inlet is used to limit the slurry flow rate, so that large particles are precipitated downward. However, during use, the bell-mouth type water inlet has a low restriction on the slurry flow rate, resulting in a poor precipitation effect of large particles and poor anti-clogging ability.

[0006] 2. The anti-clogging structure of the limestone slurry delivery pump mentioned above has a pump body connected to the water pool through a water pump inlet pipe. The water inlet of the water pump inlet pipe is arranged in the water pool. The water inlet of the water pump inlet pipe is a bell-mouth type. The bell-mouth type water inlet is used to limit the slurry flow rate so that large particles are precipitated downward. However, during use, it lacks a structure for pressurizing the slurry, which makes it inconvenient to transport the limestone slurry to a high place and its functionality is poor.

[0007] To this end, we provide an automatic pressurization and anti-clogging system for a limestone slurry delivery pump to solve the above problems. Utility Model Content

[0008] The purpose of the utility model is to provide an automatic pressurizing and anti-clogging system for a limestone slurry conveying pump, which filters large-particle sediments in the limestone slurry through a rotating plate and a sieve hole, and collects the filtered sediments through a collecting box, thereby solving the problem of poor anti-clogging ability of the existing system. At the same time, the first piston plate drives the second piston plate to perform reciprocating motion, and the pressure in the lower shell is adjusted by the second piston plate, thereby pressurizing the limestone slurry and solving the problem of the existing inconvenience in pressurizing the limestone slurry.

[0009] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0010] The utility model is an automatic pressurizing and anti-blocking system for a limestone slurry delivery pump, comprising a delivery shell, an anti-blocking component being provided at the feed end of the delivery shell, and a pressurizing component being further provided at the discharge end of the delivery shell;

[0011] The anti-blocking assembly includes an anti-blocking shell located on one side of the conveying shell, the bottom of the anti-blocking shell is sealed and clamped with a collection box, the inner center of the anti-blocking shell is rotatably connected to a rotating shaft, the outer wall of the rotating shaft is sleeved with a sleeve, and the outer wall of the sleeve is welded with multiple rotating plates at equal intervals along its circumference, and the surface of the rotating plates is evenly provided with sieve holes;

[0012] The pressurizing assembly includes an upper shell located on the other side of the conveying shell, the bottom of the upper shell is fixedly connected to the lower shell, the interior of the upper shell and the lower shell are respectively movably connected with the first piston plate and the second piston plate, the top of the upper shell is fixedly connected to the electric push rod, the piston rod of the electric push rod passes through the top of the upper shell and is fixedly connected to the center position of the upper surface of the first piston plate, a connecting rod is welded to the center position of the lower surface of the first piston plate, and the bottom end of the connecting rod movably passes through the bottom of the upper shell and the top of the lower shell in turn and is fixedly connected to the center position of the upper surface of the second piston plate.

[0013] The utility model is further configured as follows: a first liquid inlet pipe is fixedly connected to the top of the conveying shell, the first liquid inlet pipe is fixedly connected to a connecting pipe through a three-way valve, the bottom end of the connecting pipe is fixedly connected to a second liquid inlet pipe, the bottom end of the second liquid inlet pipe is fixedly connected to one side of the top of the anti-blocking shell, a second liquid outlet pipe is fixedly connected to one side outer wall of the anti-blocking shell, an end of the second liquid outlet pipe away from the anti-blocking shell passes through one side outer wall of the conveying shell and extends to the interior of the conveying shell, and a filter is fixedly connected to the interior of the second liquid outlet pipe.

[0014] The utility model is further configured as follows: an L-shaped frame is fixedly connected to the rear end face of the conveying shell, a first mounting plate and a second mounting plate are respectively welded to the outer walls on both sides of the vertical support arm of the L-shaped frame, and the anti-blocking shell and the upper shell are respectively fixedly connected to one side of the front end face of the first mounting plate and the second mounting plate.

[0015] The utility model is further configured as follows: a first liquid outlet pipe is fixedly connected to the bottom of the conveying shell, one end of the first liquid outlet pipe away from the conveying shell is fixedly connected to the lower side of the outer wall of the lower shell, and a third liquid outlet pipe is fixedly connected to the lower side of the outer wall of the lower shell.

[0016] The utility model is further configured as follows: a plurality of protrusions are welded on the outer wall of the rotating shaft at equal intervals along its circumference, and a plurality of grooves cooperating with the protrusions are opened on the inner side surface of the sleeve at equal intervals along its circumference.

[0017] The utility model is further configured as follows: the front end of the rotating shaft rotates through the front end surface of the anti-blocking shell and is sleeved with a ratchet, a pawl is engaged above the ratchet, and the pawl is movably connected to the front end surface of the anti-blocking shell through a mounting frame.

[0018] The utility model is further configured as follows: a lifting block is movably connected inside the installation frame, a threaded rod is fixedly connected to the top of the lifting block, the top thread of the threaded rod passes through the top of the installation frame and is fixedly connected to a knob, the front end surface of the lifting block is rotatably connected to the installation rod, and a ratchet is sleeved on the front end of the installation rod.

[0019] The utility model is further configured as follows: sliders are welded on both side outer walls of the lifting block, and sliding grooves are vertically opened on both side inner walls of the installation frame, and the free ends of the sliders are movably connected to the inside of the sliding grooves.

[0020] The utility model is further configured as follows: sliding rods are vertically fixedly connected to the four sides of the interior of the upper shell, and the four corners of the first piston plate are slidably sleeved on the sliding rods.

[0021] The utility model is further configured as follows: both sides of the top and bottom of the upper shell are fixedly connected with inlet and outlet air pipes.

[0022] The utility model has the following beneficial effects:

[0023] 1. The utility model is provided with an anti-blocking component. The limestone slurry in the first liquid inlet pipe is introduced into the anti-blocking shell through the connecting pipe and the second liquid inlet pipe via the three-way valve. At this time, the limestone slurry entering the anti-blocking shell exerts an external force on the rotating plate, causing the rotating plate to rotate directionally in the anti-blocking shell, and the large particles of sediment in the limestone slurry are screened through the sieve holes on the rotating plate. The large particles of sediment fall into the collection box, and the rest of the slurry enters the conveying shell through the second liquid outlet pipe, and the limestone slurry is input into the conveying pump through the conveying shell, thereby realizing the screening and collection of large particles of sediment in the limestone slurry, avoiding the blockage of the conveying pump, and improving its anti-blocking ability.

[0024] 2. The utility model sets a pressurizing component to start the electric push rod, so that the piston rod of the electric push rod performs vertical reciprocating motion, and the piston rod of the electric push rod drives the first piston plate to perform synchronous motion, and under the connecting action of the connecting rod, the second piston plate performs vertical linear reciprocating motion inside the lower shell. The pressure in the lower shell is changed by the movement of the second piston plate, thereby pressurizing the limestone slurry flowing through the lower shell, making it convenient to pressurize the limestone slurry and facilitate the transportation of the limestone slurry to a high place. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0026] Figure 1 The figure is a schematic diagram of the overall structure of an automatic pressurization and anti-clogging system for a limestone slurry delivery pump.

[0027] Figure 2 This is a structural diagram of the conveying shell of the utility model.

[0028] Figure 3 This is a front sectional view of the anti-blocking component of the utility model.

[0029] Figure 4 This is a schematic diagram of the installation between the rotating shaft, sleeve and rotating plate of the utility model.

[0030] Figure 5 This is a structural disassembly diagram of the pawl of the utility model.

[0031] Figure 6 This is a front sectional view of the pressurizing assembly of the present invention.

[0032] Figure 7 This is a schematic diagram of the installation between the first piston plate and the second piston plate of the utility model.

[0033] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0034] 1-transport shell, 101-first liquid inlet pipe, 101a-three-way valve, 101b-connecting pipe, 102-first liquid outlet pipe, 103-L-shaped frame, 103a-first mounting plate, 103b-second mounting plate, 2-anti-blocking assembly, 201-anti-blocking shell, 201a-second liquid inlet pipe, 201b-second liquid outlet pipe, 201c-filter, 202-collection box, 203-rotating shaft, 203a-bump, 204-sleeve, 204a-groove, 205-rotating plate, 205 a-sieve hole, 206-ratchet, 207-pawl, 207a-lifting block, 207b-threaded rod, 207c-knob, 207d-mounting rod, 207e-slider, 208-mounting frame, 208a-slide groove, 3-pressurization assembly, 301-upper shell, 301a-inlet and outlet air pipes, 302-lower shell, 302a-third liquid outlet pipe, 303-first piston plate, 303a-slide rod, 303b-electric push rod, 303c-connecting rod, 304-second piston plate. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] Example 1

[0037] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the first embodiment of the present utility model provides an automatic pressurization anti-blocking system for a limestone slurry conveying pump, comprising a conveying shell 1, an anti-blocking component 2 is provided at the feed end of the conveying shell 1, the anti-blocking component 2 comprises an anti-blocking shell 201, a collecting box 202, a rotating shaft 203, a sleeve 204 and a rotating plate 205, the rotating plate 205 is driven to rotate by the rotating shaft 203 and the sleeve 204, and the sediment in the limestone slurry is filtered through the sieve holes 205a on the rotating plate 205, thereby solving the problem of poor anti-blocking ability of the existing system.

[0038] Specifically, the anti-blocking shell 201 is located on one side of the conveying shell 1, and the bottom of the anti-blocking shell 201 is sealed and clamped with a collecting box 202. The inner center position of the anti-blocking shell 201 is rotatably connected to a rotating shaft 203. A sleeve 204 is sleeved on the outer wall of the rotating shaft 203. A plurality of rotating plates 205 are welded on the outer wall of the sleeve 204 at equal intervals along its circumference. The surface of the rotating plate 205 is evenly provided with sieve holes 205a. The anti-blocking shell 201 is used to install structures such as the collecting box 202. The feed port of the collecting box 202 is located at the inner bottom of the anti-blocking shell 201, and the connection between the collecting box 202 and the anti-blocking shell 201 is sealed. The collecting box 202 is used to collect the sediment in the anti-blocking shell 201. The rotating shaft 203 and the sleeve 204 are used to rotate the rotating plate 205. The rotating plate 205 and the sieve holes 205a are used to filter the limestone slurry in the anti-blocking shell 201.

[0039] Furthermore, the top of the conveying shell 1 is fixedly connected to a first liquid inlet pipe 101, which is fixedly connected to a connecting pipe 101b through a three-way valve 101a. The bottom end of the connecting pipe 101b is fixedly connected to a second liquid inlet pipe 201a. The bottom end of the second liquid inlet pipe 201a is fixedly connected to one side of the top of the anti-blocking shell 201. A second liquid outlet pipe 201b is fixedly connected to one side of the outer wall of the anti-blocking shell 201. An end of the second liquid outlet pipe 201b away from the anti-blocking shell 201 passes through one side of the outer wall of the conveying shell 1 and extends to the interior of the conveying shell 1. A filter screen 201c is fixedly connected to the interior of the second liquid outlet pipe 201b.

[0040] An L-shaped frame 103 is fixedly connected to the rear end face of the conveying shell 1. A first mounting plate 103a and a second mounting plate 103b are welded to the outer walls of the vertical arms of the L-shaped frame 103, respectively. The anti-blocking shell 201 is fixedly connected to one side of the front end face of the first mounting plate 103a.

[0041] The outer wall of the rotating shaft 203 is welded with a plurality of protrusions 203a at equal intervals along its circumference, and the inner side surface of the sleeve 204 is provided with a plurality of grooves 204a that cooperate with the protrusions 203a at equal intervals along its circumference.

[0042] The front end of the rotating shaft 203 rotates through the front end surface of the anti-blocking shell 201 and is sleeved with a ratchet 206. A pawl 207 is engaged above the ratchet 206. The pawl 207 is movably connected to the front end surface of the anti-blocking shell 201 through a mounting frame 208.

[0043] The interior of the mounting frame 208 is movably connected to a lifting block 207a, the top of which is fixedly connected to a threaded rod 207b. The top of the threaded rod 207b has threads that penetrate the top of the mounting frame 208 and is fixedly connected to a knob 207c. The front end surface of the lifting block 207a is rotatably connected to a mounting rod 207d, and a pawl 207 is sleeved on the front end of the mounting rod 207d.

[0044] Slide blocks 207e are welded on both outer walls of the lifting block 207a, and slide grooves 208a are vertically opened on both inner walls of the mounting frame 208. The free ends of the slide blocks 207e are movably connected to the inside of the slide grooves 208a.

[0045] The operation process of this embodiment is as follows: the limestone slurry in the first liquid inlet pipe 101 is introduced into the anti-blocking housing 201 through the three-way valve 101a via the connecting pipe 101b and the second liquid inlet pipe 201a. At this time, the limestone slurry entering the anti-blocking housing 201 exerts an external force on the rotating plate 205, causing the rotating plate 205 to rotate in a direction within the anti-blocking housing 201. The large particles of sediment in the limestone slurry are screened through the sieve holes 205a on the rotating plate 205. The large particles of sediment fall into the collection box 202, while the rest of the slurry enters the conveying housing 1 through the second liquid outlet pipe 201b, and the limestone slurry is input into the conveying pump through the conveying housing 1.

[0046] Example 2

[0047] See also Figure 1 、 Figure 2 、 Figure 6 and Figure 7 As shown, it is the second embodiment of the present utility model, which is based on the previous embodiment, but is different from the previous embodiment in that: the discharge end of the conveying shell 1 is also provided with a pressurizing component 3, and the pressurizing component 3 includes an upper shell 301, a lower shell 302, a first piston plate 303 and a second piston plate 304. The pressure in the lower shell 302 is changed by the first piston plate 303 and the second piston plate 304, so as to pressurize the limestone slurry flowing through the lower shell 302, thereby solving the existing problem of inconvenience in pressurizing the limestone slurry.

[0048] Specifically, the upper shell 301 is fixedly connected to one side of the front end surface of the second mounting plate 103b, the bottom of the upper shell 301 is fixedly connected to the lower shell 302, the interiors of the upper shell 301 and the lower shell 302 are movably connected to the first piston plate 303 and the second piston plate 304 respectively, the top of the upper shell 301 is fixedly connected to the electric push rod 303b, the piston rod of the electric push rod 303b passes through the top of the upper shell 301 and is fixedly connected to the center position of the upper surface of the first piston plate 303, the center position of the lower surface of the first piston plate 303 is welded with a connecting rod 303c, the bottom end of the connecting rod 303c is movably passed through the bottom and The top of the lower shell 302 is fixedly connected to the center position of the upper surface of the second piston plate 304. The upper shell 301 is configured to install the first piston plate 303. The lower shell 302 is configured to pressurize the limestone slurry. The first piston plate 303 is configured to drive the second piston plate 304 to move. The electric push rod 303b is configured to drive the first piston plate 303 to move. The connecting rod 303c is configured to connect the first piston plate 303 and the second piston plate 304. The second piston plate 304 is configured to adjust the pressure inside the lower shell 302, thereby pressurizing the limestone slurry.

[0049] Furthermore, the bottom of the delivery shell 1 is fixedly connected to a first liquid outlet pipe 102. One end of the first liquid outlet pipe 102 away from the delivery shell 1 is fixedly connected to the lower side of the outer wall of the lower shell 302. The lower side of the outer wall of the lower shell 302 is fixedly connected to a third liquid outlet pipe 302a.

[0050] The upper shell 301 is vertically fixedly connected to the inner four sides with sliding rods 303a, and the four corners of the first piston plate 303 are slidably mounted on the sliding rods 303a; the top and bottom sides of the upper shell 301 are fixedly connected with the inlet and outlet pipes 301a.

[0051] The rest of the structure is the same as that of Example 1.

[0052] The operation process of this embodiment is: start the electric push rod 303b, so that the piston rod of the electric push rod 303b performs vertical reciprocating motion, and the piston rod of the electric push rod 303b drives the first piston plate 303 to move synchronously, and under the connecting action of the connecting rod 303c, the second piston plate 304 performs vertical linear reciprocating motion inside the lower shell 302, and the pressure inside the lower shell 302 is changed by the movement of the second piston plate 304, thereby pressurizing the limestone slurry flowing through the lower shell 302.

[0053] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, numerous modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic pressurization and anti-clogging system for a limestone slurry delivery pump, comprising a delivery housing (1), characterized in that: The feed end of the conveying shell (1) is provided with an anti-blocking component (2), and the discharge end of the conveying shell (1) is also provided with a pressurizing component (3); The anti-blocking assembly (2) comprises an anti-blocking shell (201) located on one side of the conveying shell (1), and the bottom of the anti-blocking shell (201) is sealed and clamped with a collecting box (202), the inner center position of the anti-blocking shell (201) is rotatably connected to a rotating shaft (203), and a sleeve (204) is sleeved on the outer wall of the rotating shaft (203), and a plurality of rotating plates (205) are welded on the outer wall of the sleeve (204) at equal intervals along the circumference thereof, and the surface of the rotating plates (205) is evenly provided with sieve holes (205a); The pressurizing assembly (3) includes an upper shell (301) located on the other side of the conveying shell (1), and the bottom of the upper shell (301) is fixedly connected to the lower shell (302), the interiors of the upper shell (301) and the lower shell (302) are movably connected to the first piston plate (303) and the second piston plate (304), respectively, and the top of the upper shell (301) is fixedly connected to an electric push rod (303b), the piston rod of the electric push rod (303b) passes through the top of the upper shell (301) and is fixedly connected to the center position of the upper surface of the first piston plate (303), and a connecting rod (303c) is welded to the center position of the lower surface of the first piston plate (303), and the bottom end of the connecting rod (303c) movably passes through the bottom of the upper shell (301) and the top of the lower shell (302) in turn and is fixedly connected to the center position of the upper surface of the second piston plate (304).

2. The automatic pressurization and anti-blocking system for a limestone slurry delivery pump according to claim 1 is characterized in that: The top of the conveying shell (1) is fixedly connected to a first liquid inlet pipe (101), and the first liquid inlet pipe (101) is fixedly connected to a connecting pipe (101b) via a three-way valve (101a). The bottom end of the connecting pipe (101b) is fixedly connected to a second liquid inlet pipe (201a), and the bottom end of the second liquid inlet pipe (201a) is fixedly connected to one side of the top of the anti-blocking shell (201). A second liquid outlet pipe (201b) is fixedly connected to one side of the outer wall of the anti-blocking shell (201), and one end of the second liquid outlet pipe (201b) away from the anti-blocking shell (201) passes through one side of the outer wall of the conveying shell (1) and extends to the interior of the conveying shell (1). The interior of the second liquid outlet pipe (201b) is fixedly connected to a filter screen (201c).

3. The automatic pressurization and anti-clogging system for a limestone slurry delivery pump according to claim 1, characterized in that: An L-shaped frame (103) is fixedly connected to the rear end face of the conveying shell (1), and a first mounting plate (103a) and a second mounting plate (103b) are respectively welded to the outer walls of both sides of the vertical support arm of the L-shaped frame (103), and the anti-blocking shell (201) and the upper shell (301) are respectively fixedly connected to one side of the front end face of the first mounting plate (103a) and the second mounting plate (103b).

4. The automatic pressurization and anti-clogging system for a limestone slurry delivery pump according to claim 1, characterized in that: The bottom of the conveying shell (1) is fixedly connected to a first liquid outlet pipe (102), and one end of the first liquid outlet pipe (102) away from the conveying shell (1) is fixedly connected to the lower side of the outer wall of the lower shell (302), and the lower side of the outer wall of the lower shell (302) is fixedly connected to a third liquid outlet pipe (302a).

5. The automatic pressurization and anti-clogging system for a limestone slurry delivery pump according to claim 1 is characterized in that: A plurality of protrusions (203a) are welded on the outer wall of the rotating shaft (203) at equal intervals along its circumference, and a plurality of grooves (204a) cooperating with the protrusions (203a) are opened on the inner side surface of the sleeve (204) at equal intervals along its circumference.

6. The automatic pressurization and anti-clogging system for a limestone slurry delivery pump according to claim 1, characterized in that: The front end of the rotating shaft (203) rotates through the front end surface of the anti-blocking shell (201) and is sleeved with a ratchet (206), and a pawl (207) is engaged above the ratchet (206). The pawl (207) is movably connected to the front end surface of the anti-blocking shell (201) through a mounting frame (208).

7. The automatic pressurization and anti-clogging system for a limestone slurry delivery pump according to claim 6, characterized in that: The interior of the installation frame (208) is movably connected to a lifting block (207a), and the top of the lifting block (207a) is fixedly connected to a threaded rod (207b), the top thread of the threaded rod (207b) passes through the top of the installation frame (208) and is fixedly connected to a knob (207c), and the front end surface of the lifting block (207a) is rotatably connected to a mounting rod (207d), and the pawl (207) is sleeved on the front end of the mounting rod (207d).

8. The automatic pressurization and anti-clogging system for a limestone slurry delivery pump according to claim 7, characterized in that: Slide blocks (207e) are welded on both outer walls of the lifting block (207a), and slide grooves (208a) are vertically provided on both inner walls of the mounting frame (208), and the free ends of the slide blocks (207e) are movably connected to the inside of the slide grooves (208a).

9. The automatic pressurization and anti-clogging system for a limestone slurry delivery pump according to claim 1, characterized in that: Slide rods (303a) are vertically fixedly connected to the four sides of the interior of the upper shell (301), and the four corners of the first piston plate (303) are slidably mounted on the slide rods (303a).

10. The automatic pressurization and anti-clogging system for a limestone slurry delivery pump according to claim 9, characterized in that: Both the top and bottom sides of the upper shell (301) are fixedly connected with air inlet and outlet pipes (301a).

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