Delivery pump for quantitative-volume liquid

Abstract

The invention discloses a delivery pump for quantitative-volume liquid, and belongs to the technical field of pump valves, the delivery pump comprises a pump body, a liquid inlet valve group, a liquid outlet valve group, a piston body, a pump cover and a valve rod assembly, a pump cavity is arranged in the pump body, the pump body is provided with a liquid inlet channel and a liquid outlet channel along the inner wall of the pump body, the liquid inlet valve group is communicated with the inlet end of the liquid inlet channel, and the liquid outlet valve group is communicated with the outlet end of the liquid outlet channel; the liquid outlet valve group is communicated with the outlet end of the liquid discharge channel; the piston body comprises a mounting ring body, an elastic connecting pipe and a conical end, and one end of the valve rod assembly extends into the piston body and is fixedly connected with the conical end; the valve rod assembly is driven to move outwards to drive the conical end to move leftwards to compress the elastic connecting pipe to generate suction power, so that the liquid inlet valve group is opened for liquid inlet; and the valve rod assembly is reversely driven to move inwards to drive the conical end to move rightwards to stretch the elastic connecting pipe to generate repulsive power, so that the liquid outlet valve group is opened to discharge liquid. The quantitative liquid can be continuously sucked and discharged, the liquid conveying volume can be set according to requirements, and the requirements of various application scenes are met.

Description

Technical Field

[0001] The invention relates to the technical field of pumps and valves, and in particular to a delivery pump for quantitative volume liquid. Background Art

[0002] In order to realize the controllability, sealing and durability of bellows pump in the transportation of highly corrosive fluids in the process of semiconductor and other industries, the logic circuit is used to control the switching direction of the solenoid valve to realize the operation of the bellows pump. In this process, the bellows pump needs to use the logic circuit to control the switching direction of the solenoid valve before the bellows pump can switch the working direction to realize the quantitative liquid transportation. This process requires frequent switching of the working direction of the bellows pump, which is relatively cumbersome, resulting in low liquid transportation efficiency and low control accuracy of the volume of the transported liquid. In addition, the structure of the bellows pump is relatively complex, with many parts and components, and high processing costs. Summary of the invention

[0003] Technical problem to be solved: In response to the problems existing in the working process of the quantitative delivery device in the background technology, the present invention provides a delivery pump for a quantitative volume of liquid, which can continuously realize the suction and discharge of a quantitative liquid, and the liquid delivery volume can be set according to demand, meeting the needs of multiple technical fields such as semiconductors, photovoltaics, and chemical industry.

[0004] Technical solution: The present invention provides a delivery pump for quantitative volume liquid, the delivery pump comprising: A pump body, wherein a pump cavity with an open end is arranged in the pump body, and the bottom of the pump cavity forms a cone bottom structure; the pump body is provided with a liquid inlet channel along its inner wall, the liquid outlet of the liquid inlet channel is located at the inlet end of the pump cavity, and the inlet end of the liquid inlet channel is communicated with the outer wall of the bottom end of the pump body; a discharge channel is arranged on a side wall of the pump body different from the liquid inlet channel, the inlet end of the discharge channel is located at the waistline root of the cone bottom structure, and the outlet end of the discharge channel is communicated with the outer wall of the bottom end of the pump body; the open end of the pump body is provided with a clamping step along its inner diameter; A liquid inlet valve group, which is correspondingly connected to one side of the pump body and communicated with the inlet end of the liquid inlet channel, and controls the injection of liquid into the pump cavity; A liquid outlet valve group, the liquid outlet valve group is correspondingly connected to one side of the pump body and communicated with the outlet end of the liquid discharge channel, and the liquid outlet valve group controls the discharge of the liquid in the pump cavity; The piston body comprises a mounting ring body correspondingly and sealingly clamped in the clamping step, an elastic connecting tube is integrally formed on one side of the mounting ring body, a liquid receiving cavity of a preset volume is formed between the outer side of the elastic connecting tube and the pump cavity, and the elastic connecting tube is compressed or stretched along the axial direction; the end of the elastic connecting tube is connected to a conical end adapted to the conical bottom structure; A pump cover, which is correspondingly arranged at the open end of the pump body and presses the mounting ring of the piston body into the clamping step; A valve stem assembly, one end of which extends into the piston body and is fixedly connected to the tapered end, and the other end of which passes through the center of a pump cover disposed at the open end of the pump chamber; The valve stem assembly is driven to move outward, driving the tapered end to move leftward to compress the elastic connecting tube, thereby increasing the liquid receiving cavity and generating suction power, so that the liquid inlet valve assembly opens to allow liquid to flow in, and the liquid outlet assembly closes to stop discharging liquid; The valve stem assembly moves outward to a set stroke to complete quantitative liquid intake, and reversely drives the valve stem assembly inward to drive the tapered end to move rightward to stretch the elastic connecting tube, thereby reducing the liquid receiving cavity and generating a repulsive force, so that the liquid inlet valve group closes the liquid inlet and the liquid outlet valve group opens to discharge the liquid, thereby completing quantitative liquid discharge.

[0005] Preferably, the liquid inlet valve group and the liquid outlet valve group both include a valve body, an L-shaped liquid passage is provided in the valve body, a third mounting end pipe connected to one end of the liquid passage is provided on one side of the valve body, and the third mounting end pipe is fixedly connected to the delivery hose through a sealing ring sleeve; The other end of the liquid passage is connected to at least one set of valve core components corresponding to the inlet end of the liquid inlet passage or the outlet end of the liquid discharge passage, and the valve core component is a one-way valve structure.

[0006] Preferably, the valve core assembly comprises a valve core seat and a valve core end ring, one end of the valve core seat is provided with a plurality of liquid holes, the other end of the valve core seat is an open end, and the inner diameter of the open end of the valve core seat is provided with a third limiting ring cavity; A second limiting ring body is arranged on the outer periphery of the valve core end ring, the outer diameter of the second limiting ring body is consistent with the outer diameter of the valve core seat, the outer diameter of the valve core end ring is consistent with the third limiting ring cavity and is correspondingly inserted into the third limiting ring cavity, and the second limiting ring body is in contact with the open end of the valve core end ring; The inner wall of the valve core end ring forms a tapered flow channel from the outside to the inside, and a float is arranged in the valve core seat, and the float can correspondingly block or open the outlet of the tapered flow channel.

[0007] Preferably, the pump body is provided with a first mounting end tube corresponding to the inlet end of the liquid inlet channel, and two groups of valve core assemblies are provided between the first mounting end tube and the valve body of the liquid inlet valve group; the liquid inlet valve group is fixedly connected to the liquid outlet valve group by third connecting bolts correspondingly provided at its four corners penetrating the pump body.

[0008] Preferably, the pump cover comprises a cover seat, a guide seat and a second mounting end cover; A valve stem cavity through which the valve stem assembly passes is arranged in the cover seat, and a third ring body is arranged at one end of the cover seat away from the pump body and in the circumferential direction of the valve stem cavity; The end of the guide seat away from the cover seat is open, and the second mounting end cover is correspondingly connected to the open end of the guide seat; a limited position cavity is arranged in the guide seat, a valve stem through hole is arranged at one end of the guide seat close to the cover seat, and a first limited position ring cavity is arranged at the outer end of the valve stem through hole; the guide seat is docked with the cover seat so that the third ring body is correspondingly clamped in the first limited position ring cavity; The valve stem assembly comprises a first limiting ring body arranged along the circumference of the valve stem, and the first limiting ring body is slidably connected in the first limiting ring cavity.

[0009] Preferably, the valve stem assembly comprises a first valve stem accommodated in the cover seat and the pump body, and a second valve stem accommodated in the guide seat; A first threaded end rod is provided at one end of the first valve stem, and a second threaded countersunk hole fixedly connected to the first threaded end rod is provided in the center of the tapered end; a second threaded end rod is provided at the other end of the first valve stem, and a first threaded countersunk hole fixedly connected to the second threaded end rod is provided at one end of the second valve stem; an external threaded area is provided at the outer periphery of the first threaded countersunk hole of the second valve stem, and a connecting screw ring corresponding to the inner end of the second threaded end rod supported on the first valve stem is connected to the external threaded area of ​​the second valve stem, and the connecting screw ring is correspondingly supported on the outer end of the valve stem through hole of the guide seat, and the outer diameter of the connecting screw ring is adapted to the inner diameter of the valve stem cavity of the cover seat and is correspondingly supported in the valve stem cavity; the first limiting ring body is fixedly connected to the second valve stem, and a connecting end connected to the power mechanism is provided at the end of the second valve stem away from the guide seat.

[0010] Preferably, a mounting seat is arranged between the cover seat and the pump body, a second mounting end tube is arranged at one end of the cover seat close to the mounting seat, and the mounting seat is correspondingly sleeved on the second mounting end tube; second limiting ring grooves are respectively provided at both ends of the inner wall of the mounting seat, a second ring body corresponding to the second limiting ring groove is arranged at the root of the second mounting end tube, and a fourth ring body corresponding to the second limiting ring groove is arranged at the tapered end of the mounting ring body.

[0011] Preferably, a second limiting ring cavity is formed at the inner end of the mounting ring body, and the second mounting end tube extends into the mounting ring body and is supported and pressed against the second limiting ring cavity.

[0012] Preferably, first connecting bolts are respectively provided at the four corners of the second mounting end cover, and the first connecting bolts penetrate the second mounting end cover, the guide seat, the cover seat and the mounting seat to be fixedly connected into an integrated structure.

[0013] Preferably, the bottom end of the pump body is provided with an opening corresponding to the liquid inlet channel and a sealing rubber plug arranged in the opening, and the bottom end of the pump body is provided with a first mounting end cover; Second connecting bolts are correspondingly arranged at the four corners of the first mounting end cover, and the second connecting bolts penetrate the first mounting end cover, and the pump body and the mounting seat are fixedly connected into an integrated structure.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The delivery pump of the present invention can continuously realize the suction and discharge of quantitative liquid, and the liquid delivery volume can be set according to demand, meeting the needs of multiple technical fields such as semiconductors, photovoltaics, and chemical industry.

[0015] 2. The mounting ring structure of the piston body cooperates with the open end of the pump body and the mounting seat to achieve a firm and stable connection between the mounting ring of the piston body and the open end of the pump body and the mounting seat, thereby preventing the mounting ring from falling off from the open end of the pump body due to excessive tension when the elastic connecting tube of the piston body is contracted or expanded, thereby affecting the normal use of the delivery pump.

[0016] 3. The elastic connecting tube is a tube body provided with multiple pleated structures. When the elastic connecting tube is squeezed or stretched, the pleats can be shrunk or opened, thereby compressing or increasing the volume of the elastic connecting tube, thereby adjusting the volume of the liquid receiving cavity to complete the suction or discharge of the liquid; during the shrunk or opened process, the elastic connecting tube can be deformed stably and regularly through the pleated structure, thereby preventing the elastic connecting tube from irregularly deforming and causing inconsistent liquid delivery volume, and the regular deformation can prevent the elastic connecting tube from bulging or fatigue failure, thereby increasing its service life.

[0017] 4. The valve stem assembly can operate stably in the pump chamber, thereby realizing stable driving of the piston body; the valve stem assembly, as a power transmission connector, can realize stable and accurate transmission of power, thereby improving the accuracy of piston body volume adjustment.

[0018] 5. The initial position of the valve stem assembly in the pump cover can be adjusted according to demand. By controlling its starting position, the size of the liquid receiving cavity in the pump cavity can be controlled to meet the demand for adjusting the quantitative liquid volume.

[0019] The present invention also has other beneficial effects which are described in the embodiments of the specification and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the delivery valve of the present invention from a first viewing angle; Figure 2 for Figure 1 A schematic diagram of the structure of the middle delivery valve from a second perspective; Figure 3 for Figure 2 A structural cross-sectional view of the middle delivery valve along the axial direction of its valve stem in the height direction; Figure 4 for Figure 2A cross-sectional view of the structure of the middle delivery valve along the axial direction of its valve stem in the width direction; Figure 5 for Figure 2 A schematic diagram of the guide seat of the middle delivery valve and its internal structure; Figure 6 for Figure 5 A cross-sectional view of the middle guide seat along the axial structure of the valve stem; Figure 7 for Figure 5 Schematic diagram of the three-dimensional structure of the middle valve stem assembly; Figure 8 for Figure 7 A cross-sectional view of the middle valve stem assembly along its axial structure; Fig. 9 for Figure 1 Schematic diagram of the structure of the middle pump body and its inner piston body; Fig.10 for Figure 4 A cross-sectional view of the pump body, mounting seat and piston body along their axial structure; Fig.11 for Fig. 9 A cross-sectional view of the middle pump body and its inner piston body along their axial structure; Fig.12 for Fig.11 Schematic diagram of the three-dimensional structure of the piston body; Fig.13 for Fig.12 A cross-sectional view of the piston body along its axial structure; Fig.14 for Figure 1 Schematic diagram of the connection structure between the middle liquid outlet valve group and the liquid inlet valve group; Fig.15 for Fig.14 Schematic diagram of the three-dimensional structure of the middle valve body; Fig.16 for Fig.15 A cross-sectional view of the middle valve body along the axial direction of the third mounting end tube; Fig.17 for Fig.15 A cross-sectional view of the middle valve body along the axial structure of the valve core assembly; Fig.18 for Fig.15 A schematic diagram of the three-dimensional structure of the middle valve core assembly from the first perspective; Fig.19 for Fig.18 A schematic diagram of the three-dimensional structure of the middle valve core assembly from the second perspective; Fig. 20 for Fig.19 A cross-sectional view of the middle valve core assembly along its axial structure; Fig.21 for Figure 3 The enlarged structural diagram of the middle delivery valve A; Fig. 22for Figure 3 The enlarged structural diagram of the middle delivery valve B; Fig.23 for Figure 3 The enlarged structural diagram of the middle delivery valve C; Fig.24 for Figure 3 Enlarged structural diagram of the middle delivery valve D.

[0021] 1. Pump housing; 2. Pump cavity; 2. Cone bottom structure; 2. Liquid inlet channel; 2. Liquid outlet; 2. Liquid discharge channel; 2. First mounting end tube; 2. First mounting ring groove; 2. First ring body; 3. Liquid outlet valve group; 4. First mounting end cover; 5. Liquid inlet valve group; 6. Valve stem assembly; 6. First valve stem; 6. First threaded end rod; 6. Second valve stem; 6. First limiting ring body; 6. Connecting end; 6. Connecting screw ring; 6. First threaded counterbore; 6. External thread area; 6. Second threaded end rod; 7. Cover seat; 7. Valve stem cavity; 7. Second ring body; 7. Third ring body; 7. Second mounting end tube; 8. Guide seat; 8. Limiting cavity; 8. Valve stem through hole; 8. First limiting ring cavity; 8. First connecting through hole; 8. 5. Connecting screw hole; 9. Second mounting end cover; 10. Mounting seat; 101. Second limiting ring groove; 102. Connecting block; 11. Piston body; 111. Conical end; 112. Second threaded countersunk hole; 113. Elastic connecting tube; 114. Mounting ring body; 115. Fourth ring body; 116. Second limiting ring cavity; 117. Third limiting ring groove; 12. First connecting bolt; 13. Second connecting bolt; 14 , the third connecting bolt; 15, valve body; 151, the second connecting through hole; 152, the third mounting end pipe; 153, the liquid passage; 16, the valve core assembly; 161, the valve core seat; 162, the valve core end ring; 163, the liquid hole; 164, the tapered flow channel; 165, the second limiting ring body; 166, the third limiting ring cavity; 167, the float; 17, the sealing ring sleeve; 18, the delivery hose; 19, the sealing plug. DETAILED DESCRIPTION

[0022] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will be combined with the attached Figures 1 to 24 The technical solutions of the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0023] like Figures 1 to 4As shown, the present invention discloses a delivery pump for quantitative volume liquid, and the delivery pump 100 includes a pump body 2, a liquid inlet valve group 5, a liquid outlet valve group 3, a piston body 11, a pump cover 1 and a valve stem assembly 6.

[0024] like Figure 3 As shown, a pump chamber 21 with an open end is provided in the pump body 2, and a cone bottom structure 22 is formed at the bottom of the pump chamber 21; a liquid inlet channel 23 is provided along the inner wall of the pump body 2, and a liquid outlet 24 of the liquid inlet channel 23 is located at the inlet end of the pump chamber 21, and the inlet end of the liquid inlet channel 23 is communicated with the outer wall of the bottom end of the pump body 2, and a liquid inlet valve group 5 is correspondingly connected to one side of the pump body 2 and communicated with the inlet end of the liquid inlet channel 23, and the liquid inlet valve group 5 controls the injection of liquid into the pump chamber 21. A liquid discharge channel 25 is provided on a side wall of the pump body 2 different from the liquid inlet channel 23, and the inlet end of the liquid discharge channel 25 is located at the waistline root of the cone bottom structure 22, and the outlet end of the liquid discharge channel 25 is communicated with the outer wall of the bottom end of the pump body 2, and a liquid outlet valve group 3 is correspondingly connected to one side of the pump body 2 and communicated with the outlet end of the liquid discharge channel 25, and the liquid outlet valve group 3 controls the discharge of liquid in the pump chamber 21.

[0025] like Figures 10 to 13 As shown, a clamping step is provided along the inner diameter of the open end of the pump body 2, a first mounting ring groove 27 is provided on the inner side wall of the clamping step, and a first ring body 28 is formed on the inner circle of the first mounting ring groove 27; the piston body 11 includes a mounting ring body 114 which is correspondingly sealed and clamped in the clamping step, and a third limiting ring groove 117 is provided on the back side of the mounting ring body 114 corresponding to the first ring body 28. When the mounting ring body 114 is correspondingly clamped in the clamping step, the first ring body 28 can be correspondingly clamped in the third limiting ring groove 117, so that the mounting ring body 114 and the clamping step form an S-shaped connecting surface, thereby improving the connection strength and stability between the mounting ring body 114 and the open end of the pump body. An elastic connecting tube 113 is integrally formed on one side of the mounting ring body 114, and a liquid receiving cavity of a preset volume is formed between the outer side of the elastic connecting tube 113 and the pump cavity 21, and the elastic connecting tube 113 is compressed or stretched along the axial direction; the end of the elastic connecting tube 113 is connected to a conical end 111 adapted to the cone bottom structure 22. In a specific embodiment, the elastic connecting tube 113 is a tube body provided with a plurality of pleated structures, and when the elastic connecting tube 113 is squeezed or stretched, the pleats can be condensed or opened, so that the volume of the elastic connecting tube 113 is compressed or increased, thereby adjusting the volume of the liquid receiving cavity to complete the suction or discharge of the liquid; the elastic connecting tube 113 can be deformed stably and regularly through the pleated structure during the condensation or opening process, thereby preventing the elastic connecting tube 113 from irregular deformation resulting in inconsistent liquid delivery volume, and the regular deformation can prevent the elastic connecting tube 113 from bulging or fatigue failure, thereby increasing its service life.

[0026] The pump cover 1 is correspondingly arranged at the open end of the pump body 2, and the mounting ring 114 of the piston body 11 is correspondingly pressed into the clamping step. Figures 3 to 6 and Fig.21 As shown, the pump cover 1 includes a cover seat 7, a guide seat 8 and a second mounting end cover 9. A valve stem cavity 71 through which the valve stem assembly 6 passes is provided in the cover seat 7, and a third ring body 73 is provided circumferentially in the valve stem cavity 71 at the end of the cover seat 7 away from the pump body 2. The end of the guide seat 8 away from the cover seat 7 is open, and the second mounting end cover 9 is correspondingly connected to the open end of the guide seat 8. A limited cavity 81 is provided in the guide seat 8, and a valve stem through hole 82 is provided at the end of the guide seat 8 close to the cover seat 7, and a first limited ring cavity 83 is provided at the outer end of the valve stem through hole 82 of the guide seat 8. The guide seat 8 is docked with the cover seat 7 so that the third ring body 73 is correspondingly clamped in the first limited ring cavity 83, so that the cover seat 7 and the guide seat 8 form a sealed and firm connection at the connection when they are connected.

[0027] like Figures 4 to 8 As shown, the valve stem assembly 6 includes a first valve stem 61 accommodated in the cover seat 7 and the pump body 2, and a second valve stem 63 accommodated in the guide seat 8. A first threaded end rod 62 is provided at one end of the first valve stem 61, and a second threaded countersunk hole 112 fixedly connected to the first threaded end rod 62 is provided in the center of the tapered end 111, so that the first valve stem 61 and the tapered end 111 are fixedly connected to form an integral structure, so that the elastic connecting tube 113 can be condensed or opened by driving the tapered end 111 forward or backward by the first valve stem 61, thereby realizing the suction or discharge of liquid. A second threaded end rod 69 is provided at the other end of the first valve stem 61, and a first threaded countersunk hole 67 fixedly connected to the second threaded end rod 69 is provided at one end of the second valve stem 63, and the first valve stem 61 and the second valve stem 63 are fixedly connected by threads. The second valve stem 63 is provided with an external threaded area 68 at the outer periphery of the first threaded counterbore 67. The second valve stem 63 is connected to a connecting screw ring 66 corresponding to the inner end of the second threaded end rod 69 supported on the first valve stem 61 at the external threaded area 68. The connecting screw ring 66 is correspondingly supported on the outer end of the valve stem through hole 82 of the guide seat 8, and the outer diameter of the connecting screw ring 66 is adapted to the inner diameter of the valve stem cavity 71 of the cover seat 7 and is correspondingly supported in the valve stem cavity 71. This structure can form a stable support for the first valve stem 61 in the valve stem cavity 71, and limit the leftward movement position of the first valve stem 61, so as to avoid the first valve stem 61 exceeding the limit of the outward stroke and thus causing the elastic connecting tube 113 to be over-compressed, and avoid the fatigue of the elastic connecting tube 113 affecting its service life. The first limiting ring body 64 is fixedly connected to the second valve stem 63, and the first limiting ring body 64 is slidably connected in the first limiting ring cavity 83, so that the valve stem assembly 6 has high operating stability in the pump cavity 21. A connection end 65 connected to a power mechanism is provided at one end of the second valve stem 63 away from the guide seat 8 . The power mechanism can use a hydraulic cylinder, a driving cylinder or a linear electric cylinder to realize a linear driving action on the valve stem assembly 6 .

[0028] like Figures 1 to 4 , Fig.10 and Fig. 22 As shown, a mounting seat 10 is arranged between the cover seat 7 and the pump body 2, and a second mounting end tube 74 is arranged at one end of the cover seat 7 close to the mounting seat 10, and the mounting seat 10 is correspondingly sleeved on the second mounting end tube 74; connecting blocks 102 are respectively arranged at the two corners of the bottom end of the mounting seat 10, and threaded holes are arranged on the connecting blocks 102. The mounting seat 10 can make the delivery pump 100 axially and horizontally fixedly connected to the table top. Second limiting ring grooves 101 are respectively provided at both ends of the inner wall of the mounting seat 10, and a second ring body 72 corresponding to the second limiting ring groove 101 is provided at the root of the second mounting end tube 74, and a fourth ring body 115 corresponding to the second limiting ring groove 101 is provided on the mounting ring body 114 away from the tapered end 111. When the cover seat 7, the mounting seat 10 and the pump body 2 are installed, the second ring body 72 of the second mounting end tube 74 and the fourth ring body 115 of the mounting ring body 114 can be respectively connected to the second limiting ring grooves 101 on both sides of the mounting seat 10, thereby improving the connection stability and sealing of the cover seat 7, the mounting seat 10 and the pump body 2.

[0029] like Figure 3 and Fig. 22 As shown, a second limiting ring cavity 116 is formed at the inner end of the mounting ring body 114, and the second mounting end tube 74 extends into the mounting ring body 114 and is supported and pressed on the second limiting ring cavity 116; the mounting ring body 114 structure of this structure cooperates with the first mounting ring groove and the mounting seat 10 at the open end of the pump body 2 to achieve a firm and stable connection between the mounting ring body 114 of the piston body 11 and the open end of the pump body 2 and the mounting seat 10, thereby preventing the mounting ring body 114 and the open end of the pump body 2 from falling off due to excessive tension when the elastic connecting tube 113 of the piston body 11 is contracted or expanded, thereby affecting the normal use of the delivery pump.

[0030] like Figures 1 to 6 As shown, first connecting bolts 12 are respectively arranged at the four corners of the second mounting end cover 9, and first connecting through holes 84 for the first connecting bolts 12 to pass through are respectively opened at the four corners of the guide seat. The first connecting bolts 12 penetrate the second mounting end cover 9, the guide seat 8, the cover seat 7 and the mounting seat 10 to be fixedly connected into an integrated structure. A connecting screw hole 85 is correspondingly arranged on one side of the guide seat, and the connecting screw hole can meet the fixed support of the guide seat and improve the fixing stability of the delivery pump.

[0031] like Figures 15-17As shown, both the inlet valve group 5 and the outlet valve group 3 include a valve body 15, in which an L-shaped liquid passage 153 is provided, and a third mounting end pipe 152 connected to one end of the liquid passage 153 is provided on one side of the valve body 15, and the third mounting end pipe 152 is fixedly connected to the delivery hose 18 through a sealing ring sleeve 17. The other end of the liquid passage 153 is connected to at least one set of valve core components 16 corresponding to the inlet end of the inlet channel 23 or the outlet end of the discharge channel 25, and the valve core components 16 are one-way valve structures; the inlet valve group 5 allows one-way entry of liquid, and the outlet valve group 3 allows one-way discharge of liquid.

[0032] In a preferred embodiment, if Figures 18 to 20 As shown, the valve core assembly 16 includes a valve core seat 161 and a valve core end ring 162. A plurality of liquid holes 163 are provided at one end of the valve core seat 161, and the other end of the valve core seat 161 is an open end, and a third limiting ring cavity 166 is provided at the inner diameter of the open end of the valve core seat 161. A second limiting ring body 165 is provided at the outer periphery of the valve core end ring 162, and the outer diameter of the second limiting ring body 165 is consistent with the outer diameter of the valve core seat 161. The outer diameter of the valve core end ring 162 is consistent with the third limiting ring cavity 166 and is correspondingly inserted into the third limiting ring cavity 166, and the second limiting ring body 165 is in contact with the open end of the valve core end ring 162, so that the valve core seat 161 and the valve core end ring 162 are installed to form an integrated structure. The inner wall of the valve core end ring 162 forms a tapered flow channel 164 from the outside to the inside, and a float 167 is arranged in the valve core seat 161, and the float 167 can block or open the outlet of the tapered flow channel 164 accordingly. Figure 2~3 and Figure 23-24As shown, the axis of the valve core assembly 16 is in the vertical direction, so that the valve core seat 161 is correspondingly arranged at the upper end of the valve core end ring 162. In the normal state, the float 167 is correspondingly blocked at the outlet of the tapered flow channel 164 based on its gravity; the valve stem assembly 6 is driven to move outward, driving the tapered end 111 to move left to compress the elastic connecting tube 113, so that the liquid receiving cavity is enlarged and a suction force is generated. When the liquid is sucked, the float 167 in the valve core assembly 16 of the liquid inlet valve group 5 floats upward under the action of the suction action, thereby opening the tapered flow channel 164 to meet the liquid entry demand; and the float 167 in the valve core assembly 16 of the liquid outlet valve group 3 is firmly blocked at the outlet of the tapered flow channel 164 under the action of the suction force, thereby realizing the blocking of the liquid outlet valve group 3 and meeting the liquid inlet demand. When the valve stem assembly 6 moves outward to the set stroke to complete the quantitative liquid inflow, the valve stem assembly 6 is driven inward in the reverse direction to drive the tapered end 111 to move rightward to stretch the elastic connecting tube 113, so that the liquid storage cavity is reduced and a repulsive force is generated. The float 167 in the valve core assembly 16 of the liquid inlet valve group 5 is blocked downward at the outlet of the tapered flow channel 164 under the action of the repulsive force, thereby closing the tapered flow channel 164 to prevent the entry of liquid; and the float 167 in the valve core assembly 16 of the liquid outlet valve group 3 floats up from the outlet of the tapered flow channel 164 under the action of the repulsive force, thereby realizing the opening of the liquid outlet valve group 3 and meeting the liquid discharge demand. Repeating the above actions can realize the quantitative liquid suction, discharge and other processes, and realize the quantitative intermittent and continuous delivery of liquid.

[0033] In a preferred embodiment, if Fig.23 As shown, the pump body 2 is provided with a first mounting end pipe 26 at the inlet end of the liquid inlet channel 23, and two sets of valve core components 16 are provided between the first mounting end pipe 26 and the valve body 15 of the liquid inlet valve group 5, so as to effectively prevent the liquid inlet valve group 5 from leaking when discharging liquid, thereby improving the quantitative volume delivery accuracy of the delivery pump. Second connecting through holes 151 are provided at the four corners of the valve body 15, and the liquid inlet valve group 5 is fixedly connected to the liquid outlet valve group 3 by penetrating the pump body 2 through the third connecting bolts 14 provided at the four corners thereof.

[0034] In a preferred embodiment, if Figure 3 and Fig. 9As shown, the bottom end of the pump body 2 is provided with an opening corresponding to the liquid inlet channel 23 and a sealing rubber plug 19 provided in the opening, and the possible debris blockage in the liquid inlet channel 23 can be cleared by the sealing rubber plug 19. A first mounting end cover 4 is provided at the bottom end of the pump body 2, and second connecting bolts 13 are provided at the four corners of the first mounting end cover 4, and the second connecting bolts 13 penetrate the first mounting end cover 4, the pump body 2 and the mounting seat 10 to be fixedly connected into an integrated structure. The delivery pump uses the mounting seat 10 as an intermediate connecting member, and the first mounting end cover 4, the pump body 2 and the mounting seat 10 are fixedly connected into an integrated structure by the second connecting bolts 13, and the second mounting end cover 9, the guide seat 8, the cover seat 7 and the mounting seat 10 are fixedly connected into an integrated structure by the first connecting bolts 12, thereby conveniently realizing the fixed installation of various components of the delivery pump.

[0035] The delivery pump of the above embodiments, its main structural body, such as the pump body 2, the liquid outlet valve group 3, the liquid inlet valve group 5, the valve stem assembly 6, the cover seat 7, the guide seat 8 and other components can be made of polytetrafluoroethylene (PTFE) material with high corrosion resistance; for example, the mounting seat 10, the first connecting bolt 12, the second connecting bolt 13, the third connecting bolt 14 and the like are made of steel components to improve the overall structural strength of the delivery pump.

[0036] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A delivery pump for a quantitative volume of liquid, characterized in that: The delivery pump (100) comprises: A pump body (2), wherein a pump cavity (21) with an open end is provided in the pump body (2), and the bottom of the pump cavity (21) forms a cone bottom structure (22); the pump body (2) is provided with a liquid inlet channel (23) along its inner wall, the liquid outlet (24) of the liquid inlet channel (23) is located at the inlet end of the pump cavity (21), and the inlet end of the liquid inlet channel (23) is communicated with the outer wall of the bottom end of the pump body (2); a liquid discharge channel (25) is provided on a side wall of the pump body (2) different from the liquid inlet channel (23), the inlet end of the liquid discharge channel (25) is located at the waistline root of the cone bottom structure (22), and the outlet end of the liquid discharge channel (25) is communicated with the outer wall of the bottom end of the pump body (2); the open end of the pump body (2) is provided with a clamping step along its inner diameter; a liquid inlet valve assembly (5), the liquid inlet valve assembly (5) being connected to one side of the pump body (2) and communicating with the inlet end of the liquid inlet channel (23), the liquid inlet valve assembly (5) controlling the injection of liquid into the pump chamber (21); a liquid outlet valve assembly (3), the liquid outlet valve assembly (3) being connected to one side of the pump body (2) and communicating with the outlet end of the liquid discharge channel (25), the liquid outlet valve assembly (3) controlling the discharge of liquid in the pump chamber (21); A piston body (11), the piston body (11) comprising a mounting ring body (114) correspondingly and sealingly clamped in the clamping step, an elastic connecting tube (113) being integrally formed on one side of the mounting ring body (114), a liquid receiving cavity of a preset volume being formed between the outer side of the elastic connecting tube (113) and the pump cavity (21), and the elastic connecting tube (113) being compressed or stretched along the axial direction; a conical end (111) adapted to the conical bottom structure (22) is connected to the end of the elastic connecting tube (113); A pump cover (1), the pump cover (1) being arranged correspondingly at the open end of the pump body (2), and pressing the mounting ring body (114) of the piston body (11) correspondingly into the clamping step; A valve stem assembly (6), one end of the valve stem assembly (6) extends into the piston body (11) and is fixedly connected to the tapered end (111), and the other end of the valve stem assembly (6) passes through the center of a pump cover (1) provided at the open end of the pump chamber (21); The valve stem assembly (6) is driven to move outward, driving the tapered end (111) to move leftward and compressing the elastic connecting tube (113), thereby increasing the size of the liquid receiving cavity and generating suction power, so that the liquid inlet valve assembly (5) is opened to allow liquid to enter, and the liquid outlet assembly is closed to stop discharging liquid; The valve stem assembly (6) moves outward to a set stroke to complete quantitative liquid inlet, and reversely drives the valve stem assembly (6) inward to drive the tapered end (111) to move rightward to stretch the elastic connecting tube (113), thereby reducing the size of the liquid receiving cavity and generating a repulsive force, so that the liquid inlet valve group (5) closes the liquid inlet and the liquid outlet valve group (3) opens to discharge the liquid, thereby completing quantitative liquid discharge.

2. The delivery pump for quantitative volume liquid according to claim 1, characterized in that The liquid inlet valve group (5) and the liquid outlet valve group (3) both comprise a valve body (15), an L-shaped liquid passageway (153) being provided in the valve body (15), a third mounting end pipe (152) connected to one end of the liquid passageway (153) being provided on one side of the valve body (15), and the third mounting end pipe (152) being fixedly connected to a delivery hose (18) via a sealing ring sleeve (17); The other end of the liquid passage (153) is connected to at least one set of valve core components (16) corresponding to the inlet end of the liquid inlet channel (23) or the outlet end of the liquid discharge channel (25), and the valve core component (16) is a one-way valve structure.

3. The delivery pump for quantitative volume liquid according to claim 2, characterized in that: The valve core assembly (16) comprises a valve core seat (161) and a valve core end ring (162); one end of the valve core seat (161) is provided with a plurality of liquid holes (163); the other end of the valve core seat (161) is an open end; and the inner diameter of the open end of the valve core seat (161) is provided with a third limiting ring cavity (166); A second limiting ring body (165) is disposed on the outer periphery of the valve core end ring (162); the outer diameter of the second limiting ring body (165) is consistent with the outer diameter of the valve core seat (161); the outer diameter of the valve core end ring (162) is consistent with the third limiting ring cavity (166) and is correspondingly inserted into the third limiting ring cavity (166), so that the second limiting ring body (165) abuts against the open end of the valve core end ring (162); The inner wall of the valve core end ring (162) forms a tapered flow channel (164) from the outside to the inside, and a float (167) is arranged in the valve core seat (161). The float (167) can correspondingly block or open the outlet of the tapered flow channel (164).

4. The delivery pump for quantitative volume liquid according to any one of claims 2 to 3, characterized in that: The pump body (2) is provided with a first mounting end pipe (26) corresponding to the inlet end of the liquid inlet passage (23); two groups of valve core components (16) are provided between the first mounting end pipe (26) and the valve body (15) of the liquid inlet valve group (5); the liquid inlet valve group (5) penetrates the pump body (2) and is fixedly connected to the liquid outlet valve group (3) via third connecting bolts (14) correspondingly provided at its four corners.

5. The delivery pump for quantitative volume liquid according to claim 1, characterized in that: The pump cover (1) comprises a cover seat (7), a guide seat (8) and a second mounting end cover (9); A valve stem cavity (71) through which the valve stem assembly (6) passes is arranged in the cover seat (7), and a third ring body (73) is arranged at one end of the cover seat (7) away from the pump body (2) and circumferentially of the valve stem cavity (71); The end of the guide seat (8) away from the cover seat (7) is open, and the second mounting end cover (9) is correspondingly connected to the open end of the guide seat (8); a limiting cavity (81) is arranged in the guide seat (8), a valve stem through hole (82) is arranged at the end of the guide seat (8) close to the cover seat (7), and a first limiting ring cavity (83) is arranged at the outer end of the valve stem through hole (82) of the guide seat (8); the guide seat (8) is docked with the cover seat (7) so that the third ring body (73) is correspondingly clamped in the first limiting ring cavity (83); The valve stem assembly (6) comprises a first limiting ring body (64) arranged along the circumference of the valve stem, and the first limiting ring body (64) is slidably connected in the first limiting ring cavity (83).

6. The delivery pump for quantitative volume liquid according to claim 5, characterized in that: The valve stem assembly (6) comprises a first valve stem (61) accommodated in a cover seat (7) and a pump body (2), and a second valve stem (63) accommodated in a guide seat (8); A first threaded end rod (62) is provided at one end of the first valve stem (61), and a second threaded countersunk hole (112) fixedly connected to the first threaded end rod (62) is provided at the center of the tapered end (111); a second threaded end rod (69) is provided at the other end of the first valve stem (61), and a first threaded countersunk hole (67) fixedly connected to the second threaded end rod (69) is provided at one end of the second valve stem (63); an external threaded area (68) is provided on the outer periphery of the first threaded countersunk hole (67) of the second valve stem (63), and the second valve stem (63) is provided at the outer threaded area (68) of the first threaded countersunk hole (67). The zone (68) is connected to a connecting screw ring (66) which is correspondingly supported on the inner end of the second threaded end rod (69) of the first valve stem (61); the connecting screw ring (66) is correspondingly supported on the outer end of the valve stem through hole (82) of the guide seat (8), and the outer diameter of the connecting screw ring (66) is adapted to the inner diameter of the valve stem cavity (71) of the cover seat (7) and is correspondingly supported in the valve stem cavity (71); the first limiting ring body (64) is fixedly connected to the second valve stem (63), and the second valve stem (63) is provided with a connecting end (65) connected to the power mechanism at one end away from the guide seat (8).

7. The delivery pump for quantitative volume liquid according to claim 5, characterized in that: A mounting seat (10) is arranged between the cover seat (7) and the pump body (2); a second mounting end tube (74) is arranged at one end of the cover seat (7) close to the mounting seat (10); the mounting seat (10) is correspondingly sleeved on the second mounting end tube (74); second limiting ring grooves (101) are respectively provided at both ends of the inner wall of the mounting seat (10); a second ring body (72) corresponding to the second limiting ring groove (101) is arranged at the root of the second mounting end tube (74); and a fourth ring body (115) corresponding to the second limiting ring groove (101) is arranged at the mounting ring body (114) away from the conical end (111).

8. The delivery pump for quantitative volume liquid according to claim 7, characterized in that: A second limiting ring cavity (116) is formed at the inner end of the mounting ring body (114), and the second mounting end tube (74) extends into the mounting ring body (114) and is supported and pressed against the second limiting ring cavity (116).

9. The delivery pump for quantitative volume liquid according to claim 8, characterized in that: The four corners of the second mounting end cover (9) are respectively provided with first connecting bolts (12), and the first connecting bolts (12) penetrate the second mounting end cover (9), the guide seat (8), the cover seat (7) and the mounting seat (10) to be fixedly connected into an integral structure.

10. The delivery pump for quantitative volume liquid according to claim 7, characterized in that: The bottom end of the pump body (2) is provided with an opening corresponding to the liquid inlet passage (23) and a sealing rubber plug (19) arranged in the opening, and the bottom end of the pump body (2) is provided with a first mounting end cover (4); Second connecting bolts (13) are correspondingly arranged at the four corners of the first mounting end cover (4), and the second connecting bolts (13) penetrate the first mounting end cover (4), the pump body (2) and the mounting seat (10) to be fixedly connected into an integrated structure.

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