CN212296784U - Piston pump with seal structure of closing earlier opens - Google Patents
Piston pump with seal structure of closing earlier opens Download PDFInfo
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- CN212296784U CN212296784U CN202020457023.6U CN202020457023U CN212296784U CN 212296784 U CN212296784 U CN 212296784U CN 202020457023 U CN202020457023 U CN 202020457023U CN 212296784 U CN212296784 U CN 212296784U
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- 238000007789 sealing Methods 0.000 claims abstract description 117
- 238000000034 method Methods 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 19
- 238000005192 partition Methods 0.000 claims description 17
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 230000007547 defect Effects 0.000 abstract description 3
- 239000013013 elastic material Substances 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 10
- 230000000670 limiting effect Effects 0.000 description 9
- 230000009471 action Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000007599 discharging Methods 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a piston pump with a sealing structure of opening first and closing first; the piston comprises a piston cylinder shell, wherein a cavity is arranged in the piston cylinder shell, a sealing assembly and a piston assembly penetrate through the cavity, and a driving piece is also arranged in the cavity and can drive the sealing assembly to move to a limit position and then drive the piston assembly to move; the utility model overcomes the defect that the deformation of the check valve made of elastic material has obvious hysteresis, so that the suction inlet is in the open state and the discharge outlet is in the closed state before the air suction operation of the piston pump; before the piston pump performs the exhaust operation, the suction ports are all in a closed state and the discharge ports are all in an open state. Efficiency loss of the piston pump caused by the hysteresis problem of the one-way valve is reduced or even eliminated, so that the piston pump can operate at a higher speed.
Description
Technical Field
The utility model relates to a piston pump, in particular to piston pump with open earlier closed seal structure earlier.
Background
The conventional piston pump is constructed by: the piston pump comprises a piston driving rod, a piston and a piston cylinder, wherein the piston cylinder is provided with a suction port and a discharge port, and the suction port and the discharge port of the piston cylinder are provided with valve structures; in the process of discharging media of the piston pump, the channel of the discharge port is in an open state, and the channel of the suction port is in a closed state; this completes the operation of sucking the medium. The valve structure of the suction inlet and the discharge outlet of the existing piston pump is generally a one-way valve made of elastic materials, and the working principle is as follows: the mounting directions of the one-way valves of the suction inlet and the discharge outlet are opposite; in the process of sucking media by the piston pump, the one-way valve of the suction inlet elastically deforms towards the inner direction of the piston cylinder under the action of negative pressure, so that the one-way valve of the suction inlet is in an open state; the one-way valve of the outlet is pressed by the air pressure outside the cylinder to generate elastic deformation to cling to the outlet under the action of negative pressure, and the channel of the outlet is sealed, so that the channel of the outlet is in a closed state; in the process of discharging media by the piston pump, the one-way valve of the suction inlet generates elastic deformation towards the outer direction of the piston cylinder under the action of the internal pressure of the piston cylinder and is tightly attached to the suction inlet, so that the channel of the suction inlet is sealed, and the channel of the suction inlet is in a closed state; the one-way valve of the outlet is pushed open by the pressure inside the piston cylinder, so that the passage of the outlet is in an open state.
However, due to the material of the elastic check valve, the deformation of the elastic check valve has obvious hysteresis, that is, at the last moment when the piston pump finishes the operation of sucking the medium, the check valve of the suction inlet is in an open state; the one-way valve of the discharge port is in a closed state; the piston can enter the process of discharging the medium immediately under the action of the driving rod, but because the closing and the opening of the one-way valve are completed by self deformation, the one-way valve of the suction port is changed from opening to closing, the one-way valve of the discharge port is changed from closing to opening, the time is required for completing, the corresponding state can not be immediately entered, and the hysteresis of the one-way valve is realized, due to the hysteresis, when the piston pump enters the discharge state from the suction state, the one-way valve of the suction inlet is still in the open state and the one-way valve of the discharge outlet is still in the closed state for a small time, when the piston compresses the medium, a part of the medium flows into the outside of the suction end along the suction port, thereby causing efficiency loss, such efficiency loss is more pronounced at higher drive rates of the piston drive rod, thereby limiting the efficiency of high speed operation of the piston pump.
SUMMERY OF THE UTILITY MODEL
The object of the present invention is to overcome the above-mentioned drawbacks of the prior art and to provide a piston pump with a pre-opening and pre-closing sealing structure.
For solving the above-mentioned defect of prior art, the utility model provides a technical scheme is: a piston pump with a first-opening first-closing sealing structure comprises a piston cylinder shell, wherein a cavity is arranged in the piston cylinder shell, a sealing assembly and a piston assembly penetrate through the cavity, a driving piece is further arranged in the cavity, and the driving piece can drive the sealing assembly to move to an extreme position and then drive the piston assembly to move;
the process that the sealing assembly and the piston assembly move downwards is the air suction process of the cavity, and the process that the sealing assembly and the piston assembly move upwards is the air exhaust process of the cavity.
As an improvement of the piston pump with the first-to-open first-to-close sealing structure of the present invention, the end of the piston cylinder housing is provided with a suction inlet, one side of the piston cylinder housing is provided with a discharge outlet, the initial state of the sealing assembly is the sealing of the suction inlet, and the sealing assembly is driven by the driving member to open the suction inlet, while the discharge outlet is in the closed state.
As an improvement of the piston pump with the first-to-open first-to-close sealing structure of the present invention, the driving member drives the sealing member to start moving when the sealing member is separated from the suction port, the position of the piston member is fixed, the suction port is opened, and the discharge port is closed.
As an improvement of the piston pump with the first-to-open first-to-close sealing structure of the present invention, the driving member drives the sealing assembly to move to the limit position, the driving member disengages from the sealing assembly, the driving member continues to move downward and drives the piston assembly to move together, the suction inlet communicates with the cavity, and the cavity is in the suction state.
As an improvement of the piston pump with the pre-opening and pre-closing sealing structure of the present invention, the driving member moves upward and drives the sealing assembly to move upward together until the sealing suction inlet is closed, the discharge port is opened, the driving member continues to move upward and drives the piston assembly to move upward, and the cavity is in an exhaust state.
As an improvement of the piston pump with the first-to-open first-to-close sealing structure of the present invention, the sealing assembly includes a sealing rod, a first sealing block and a second sealing block are disposed at an interval at one end of the sealing rod, two clamping positions are disposed at an interval at the other end of the sealing rod, when the sealing assembly is in an initial state, the driving member is connected to the first clamping position through an elastic ring or an elastic assembly, when the driving member drives the sealing assembly to move to an extreme position, the driving member is disconnected from the first clamping position, and when the driving member drives the piston assembly to continue moving, the driving member drives the elastic ring or the elastic assembly to slide to the second clamping position;
the second sealing block seals the exhaust port during the suction of the suction port, and the first sealing block seals the suction port during the exhaust of the exhaust port.
As an improvement of the piston pump with the pre-opening and pre-closing sealing structure of the present invention, the piston assembly includes a piston rod, a piston is sleeved on the piston rod, a limit groove is provided at the lower end of the piston rod, the driving member can move up and down in the limit groove, the lower end of the sealing rod is arranged on the piston rod and the driving member, the lower end of the piston rod is arranged on the driving member, and the upper portion of the driving member is provided with a receiving groove matched with the limit groove.
As an improvement of the piston pump with the pre-opening pre-closing sealing structure of the present invention, a partition is further provided in the cavity, the upper end of the sealing rod is inserted into the partition, the partition is located between the first sealing block and the second sealing block, one end of the partition is provided with a stopper, the stopper forms an air inlet channel with the side wall of the cavity, the partition separates the cavity, forms an air inlet cavity and an air collecting cavity, and the air inlet cavity and the air collecting cavity are communicated through the channel.
As an improvement of the piston pump with the first-to-open first-to-close sealing structure of the present invention, the driving member drives the sealing assembly to move downward to the limit position, the first sealing block is abutted against the partition plate to limit the whole movement of the sealing assembly, the driving member drives the piston assembly to move downward when continuing to move downward, and the elastic ring is pressed to deform and follows the driving member to slide to the second clamping position.
As an improvement of the piston pump having the first-to-open first-to-close sealing structure of the present invention, the suction inlet is in a suction process, the discharge outlet is always kept in a closed state, and the discharge outlet is in a discharge process, and the suction inlet is always kept in a closed state.
As an improvement of the piston pump with the pre-opening and pre-closing sealing structure of the present invention, the middle portion of the driving member is provided with a through groove for the sealing rod to wear, the two side walls of the through groove are symmetrically provided with spring grooves, the elastic component comprises a spring arranged in the spring groove, and the end of the spring is provided with a ball body. When the sealing rod in the driving part moves, the ball is firstly butted with the first clamping position, when the first sealing block abuts against the partition plate, the movement of the whole sealing assembly is limited, when the driving part continues to move downwards, the spring is extruded by the ball, the ball is separated from the connection with the first clamping position, after the ball is separated from the connection with the first clamping position, the driving part drives the piston assembly to continue to move downwards, when the ball reaches the position of the second clamping position, the limiting effect is formed between the ball and the second clamping position, and the piston at the moment also reaches the limit position for moving downwards.
Compared with the prior art, the utility model has the advantages that: the utility model overcomes the defect that the deformation of the check valve made of elastic material has obvious hysteresis, so that the suction inlet is in the open state and the discharge outlet is in the closed state before the air suction operation of the piston pump; before the piston pump performs the exhaust operation, the suction ports are all in a closed state and the discharge ports are all in an open state. Efficiency loss of the piston pump caused by the hysteresis problem of the one-way valve is reduced or even eliminated, so that the piston pump can operate at a higher speed.
Drawings
The invention and its advantageous technical effects are described in further detail below with reference to the accompanying drawings and embodiments, in which:
fig. 1 is a schematic diagram of the overall explosion structure of the present invention.
Fig. 2 is a schematic view of the piston cylinder housing structure of the present invention.
Fig. 3 is a schematic structural diagram of the sealing assembly of the present invention.
Fig. 4 is a schematic structural diagram of the piston assembly of the present invention.
Fig. 5 is a schematic structural view of a first embodiment of the driving member of the present invention.
Fig. 6 is an initial state diagram of the piston pump of the present invention.
Fig. 7 is a state diagram of the piston pump starting to suck the medium.
Fig. 8 is a state diagram of the piston pump of the present invention completing the suction of the medium.
Fig. 9 is a state diagram of the piston pump of the present invention in which the medium starts to be discharged.
Fig. 10 is a schematic structural view of a second embodiment of the driving member of the present invention.
Fig. 11 is a schematic structural view of a second embodiment of the present invention.
Reference symbol names:
1. a piston cylinder housing;
2. a cavity; 21. a partition plate 22, a stop block 23, a channel 24 and a middle hole;
3. a seal assembly; 31. the sealing rod 32, the first sealing block 33, the second sealing block 34, the first clamping position 35 and the second clamping position;
4. a piston assembly; 41. a piston rod 42, a piston 43, a limiting groove 44 and a through hole;
5. a drive member; 51. an accommodating groove 52, a through groove 53, an annular groove 54, an upper end limiting part 55 and a spring groove;
6. a suction inlet;
7. an outlet port;
8. an elastic ring;
9. an elastic component; 91. spring 92, a ball.
Detailed Description
The invention will be further described below with reference to the drawings and specific examples, but the embodiments of the invention are not limited thereto.
As shown in fig. 1 to 9, a piston pump with a first-opening first-closing sealing structure comprises a piston cylinder housing 1, wherein a cavity is arranged in the piston cylinder housing 1, a sealing assembly 3 and a piston assembly 4 are arranged in the cavity 2 in a penetrating manner, a driving member 5 is also arranged in the cavity 2, and the driving member 5 can drive the sealing assembly 3 to move to a limit position and then drive the piston assembly 4 to move;
the process that the sealing component 3 and the piston component 4 move downwards is the air suction process of the cavity 2, and the process that the sealing component 3 and the piston component 4 move upwards is the air exhaust process of the cavity 2.
Preferably, the end of the piston cylinder housing 1 is provided with a suction port 6, one side of the piston cylinder housing 1 is provided with a discharge port 7, the sealing assembly 3 seals the suction port 6 in an initial state, and when the sealing assembly 3 is driven by the driving member 5 to open the suction port 6, the discharge port 7 is in a closed state.
The driving member 5 is a connecting component of a power device (not shown in the figures) which generates linear reciprocating motion externally and a piston pump, and the function of the connecting component is to transmit the external linear reciprocating motion to the piston through a piston rod.
Preferably, when the driving member 5 drives the sealing assembly 3 to start moving away from the suction port 6, the piston assembly 4 is not moved, the suction port 6 is opened, and the discharge port 7 is closed.
Preferably, when the driving member 5 drives the sealing assembly 3 to move to the extreme position, the driving member 5 is disengaged from the sealing assembly 3, the driving member 5 continues to move downwards and drives the piston assembly 4 to move together, the suction port 6 is communicated with the cavity 2, and the cavity 2 is in a suction state.
Preferably, the driving member 5 moves upward and drives the sealing assembly 3 to move upward together until the suction port 6 is sealed, the suction port 6 is closed, the discharge port 7 is opened, the driving member 5 continues to move upward and drives the piston assembly 4 to move upward, and the cavity 2 is in an exhaust state.
Preferably, the sealing assembly 3 includes a sealing rod 31, one end of the sealing rod 31 is provided with a first sealing block 32 and a second sealing block 33 at an interval, the other end of the sealing rod 31 is provided with two detents at an interval, when the sealing assembly 3 is in an initial state, the driving member 5 is connected to the first detent 34 through the elastic ring 8 or the elastic assembly 9, when the driving member 5 drives the sealing assembly 3 to move to an extreme position, the driving member 5 is disconnected from the first detent 34, and when the driving member 5 drives the piston assembly 4 to continue moving, the driving member 5 drives the elastic ring 8 or the elastic assembly 9 to slide to a second detent 35;
the second sealing block 33 seals the discharge port 7 during suction of the suction port 6, and the first sealing block 32 seals the suction port 6 during discharge of the discharge port 7.
Preferably, the piston assembly 4 includes a piston rod 41, a piston 42 is sleeved on the piston rod 41, a limiting groove 43 is provided at the lower end of the piston rod 41, the driving member 5 can move up and down in the limiting groove 43, the lower end of the sealing rod 31 is arranged on the piston rod 41 and the driving member 5 in a penetrating manner, the lower end of the piston rod 41 is arranged on the driving member 5 in a penetrating manner, and an accommodating groove 51 matched with the limiting groove 43 is provided at the upper portion of the driving member 5. The center of the piston rod 41 is provided with a through hole 44 for mounting the sealing rod 31, and the sealing rod 31 can move relatively in the through hole 44.
Preferably, cavity 2 is internally provided with still being equipped with baffle 21, and baffle 21 is worn to locate by the upper end of sealing rod 31, and baffle 21 is located between first sealed piece 32 and the second sealed piece 33, and the one end of baffle 21 is equipped with dog 22, and dog 22 forms the passageway 23 of admitting air with cavity 2's lateral wall, and baffle 21 separates cavity 2, forms the chamber of admitting air and collecting chamber, and the chamber of admitting air and collecting chamber pass through passageway 23 intercommunication. The middle part of the clapboard 21 is provided with a middle hole 24, the middle hole 24 is used for a sealing rod 31 to penetrate through, and the sealing rod 31 can move up and down relatively on the middle hole 24.
Preferably, when the driving member 5 drives the sealing assembly 3 to move downward to the limit position, the first sealing block 32 abuts against the partition plate 21 to limit the movement of the entire sealing assembly 3, and when the driving member 5 continues to move downward, the piston assembly 4 is driven to move downward, and the elastic ring 8 is deformed by pressure and slides to the position of the second clamping position 35 along with the driving member 5.
The middle part of the driving piece 5 is provided with a through groove 52 for the sealing rod 31 to penetrate through, the side wall of the through groove 52 is provided with an annular groove 53 which is matched with the clamping position to fix the elastic ring 8, and the opening position of the accommodating groove 51 is provided with an upper end limiting part 54.
Preferably, the exhaust port 7 is always closed during the suction of the suction port 6, and the suction port 6 is always closed during the exhaust of the exhaust port 7.
Example two: as shown in fig. 10 and 11, the present embodiment is different from the first embodiment in that the elastic member 9 is provided on the driving member, and the processes of air suction and air exhaust are the same as those of the first embodiment. Specifically, a penetrating groove 52 for the sealing rod 31 to penetrate is formed in the middle of the driving member 5, spring grooves 55 are symmetrically formed in two side walls of the penetrating groove 52, the elastic component 9 comprises a spring 91 arranged in the spring groove 55, and a ball 92 is arranged at the end of the spring 91. When the sealing rod 31 of the driving member 5 moves, the ball 92 is first abutted against the first detent 34, when the first sealing block 32 abuts against the partition 21, the movement of the entire sealing assembly 3 is limited, when the driving member 5 continues to move downward, the spring 91 is pressed by the ball 92, the ball 92 is disconnected from the first detent 34, after the ball 92 is disconnected from the first detent 34, the driving member 5 drives the piston assembly 4 to continue to move downward, when the ball 92 reaches the position of the second detent 35, the ball 92 and the second detent 35 form a limiting function, and at this time, the piston also reaches the limit position of downward movement.
The present invention has the following three states:
(1) initial state: the first sealing block 32 blocks the suction port 6; the limit groove 43 of the piston rod 41 is attached to the lower limit part of the accommodating groove 51 of the driving part 5; the elastic ring 8 in the drive element 5 engages in a first detent 34 of the sealing rod 31.
(2) And (3) an air suction state: when the driving element 5 moves linearly downwards under the action of the power device which linearly reciprocates externally, the driving element 5 can drive the sealing component 3 to move linearly downwards due to the elastic ring 8 clamped in the first clamping position 34 of the sealing rod 31, and the piston component 4 is kept static; when the first sealing block 32 is jointed with the partition plate 21 at one side of the suction port 6, the first sealing block 32 is limited from continuing to move backwards, the suction port 6 is opened at the moment, and the discharge port 7 is blocked by the second sealing block 33; the driving piece 5 continues to move linearly downwards under the action of the power device which linearly reciprocates externally, and the elastic ring 8 is extruded to deform so as to be separated from the first clamping position 34; when the upper limit part in the accommodating groove 51 of the driving member 5 is fitted with the lower limit part of the piston rod 41, the driving member 5 drives the piston rod 41 to move linearly downwards; at this time, the piston pump starts to suck media from the suction port 6 and transmits the media to the piston cavity through the connecting channel; the spring ring 8 of the drive element 5 continues its downward movement via the second detent 35.
(3) And (3) exhausting state: when the driving piece 5 reaches the maximum position of downward movement under the action of the power device of external linear reciprocating motion; the power device with the external linear reciprocating motion can immediately convert into the upward linear motion; when the elastic ring 8 of the driving member 5 is clamped into the second clamping position 35, the driving member 5 drives the sealing assembly 3 to move linearly upwards, and the piston rod 41 is kept static; when the first sealing block 32 blocks the suction port 6, the second sealing block 33 is far away from the discharge port 7, namely, the discharge port 7 is opened; at this time, the first sealing block 32 has already reached the limit position, and cannot continue to move linearly upward, the driving element 5 continues to move linearly upward under the action of the power device which linearly reciprocates externally, and the elastic ring 8 is extruded to deform, so as to disengage from the second clamping position 35; when the upper limit part in the accommodating groove 51 of the driving member 5 is engaged with the upper movement limit part of the piston rod 41, the driving member 5 drives the piston rod 41 to move linearly upward; at this point the piston pump begins to expel the medium in the piston chamber from the discharge port 7; the driving element 5 continues to move linearly upwards, and the elastic ring 8 is clamped into the first clamping position 34; the driver 5 reaches the maximum position of upward movement and the piston pump interior returns to the initial state.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and structures of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A piston pump with a first-opening first-closing sealing structure comprises a piston cylinder shell, wherein a cavity is arranged in the piston cylinder shell, and a sealing assembly and a piston assembly penetrate through the cavity;
the process that the sealing assembly and the piston assembly move downwards is the air suction process of the cavity, and the process that the sealing assembly and the piston assembly move upwards is the air exhaust process of the cavity.
2. The piston pump having a first-to-open first-to-close sealing structure as claimed in claim 1, wherein a suction port is formed at an end of the piston cylinder housing, a discharge port is formed at one side of the piston cylinder housing, the sealing assembly is in an initial state of sealing the suction port, and the discharge port is in a closed state when the sealing assembly is driven by the driving member to open the suction port.
3. The piston pump having a first-to-open first-to-close seal structure as in claim 2, wherein said drive member moves said seal assembly to begin moving away from said intake port while said piston assembly is stationary, said intake port is open and said discharge port is closed.
4. The piston pump having a first-to-open first-to-close sealing structure as claimed in claim 3, wherein said driving member disengages from said sealing assembly when said driving member moves said sealing assembly to an extreme position, said driving member continues to move downward and drives said piston assembly to move together, said suction port communicates with said chamber, and said chamber is in a suction state;
the driving part moves upwards and drives the sealing assembly to move upwards together until the suction inlet is sealed, the suction inlet is closed, the discharge outlet is opened, the driving part continues to move upwards and drives the piston assembly to move upwards, and the cavity is in an exhaust state.
5. The piston pump with the pre-opening and pre-closing seal structure as recited in claim 4, wherein the seal assembly comprises a seal rod, one end of the seal rod is provided with a first seal block and a second seal block at an interval, the other end of the seal rod is provided with two detents at an interval, the driving member is connected to the first detent through an elastic ring or an elastic assembly when the seal assembly is in the initial state, the driving member is disconnected from the first detent when the driving member drives the seal assembly to move to the limit position, and the driving member drives the elastic ring or the elastic assembly to slide to the second detent when the driving member drives the piston assembly to move continuously;
the second sealing block seals the exhaust port during the suction of the suction port, and the first sealing block seals the suction port during the exhaust of the exhaust port.
6. The piston pump with the pre-opening and pre-closing sealing structure as claimed in claim 5, wherein the piston assembly comprises a piston rod, a piston is sleeved on the upper end of the piston rod, a limit groove is formed in the lower end of the piston rod, the driving member can move up and down in the limit groove, the lower end of the sealing rod is arranged on the piston rod and the driving member in a penetrating manner, the lower end of the piston rod is arranged on the driving member in a penetrating manner, and an accommodating groove matched with the limit groove is formed in the upper portion of the driving member.
7. The piston pump with the pre-opening and pre-closing seal structure as recited in claim 5, wherein a partition is further disposed in the cavity, an upper end of the seal rod penetrates through the partition, the partition is located between the first seal block and the second seal block, a stopper is disposed at one end of the partition, the stopper and a sidewall of the cavity form an air inlet channel, the partition separates the cavity to form an air inlet cavity and an air collecting cavity, and the air inlet cavity and the air collecting cavity are communicated through the channel.
8. The piston pump with the pre-opening and pre-closing seal structure as recited in claim 7, wherein the first seal block abuts against the partition plate to limit the movement of the entire seal assembly when the driving member drives the seal assembly to move downward to the limit position, the piston assembly is driven to move downward when the driving member continues to move downward, and the elastic ring is pressed and deformed to slide to the second clamping position along with the driving member.
9. The piston pump having a pre-opening pre-closing seal structure as claimed in claim 5, wherein said suction port is always closed during suction of said suction port, and said suction port is always closed during discharge of said discharge port.
10. The piston pump with the pre-opening and pre-closing sealing structure as claimed in claim 5, wherein a through groove for the sealing rod to pass through is formed in the middle of the driving member, spring grooves are symmetrically formed on two side walls of the through groove, the elastic member comprises a spring disposed in the spring groove, and a ball is disposed at an end of the spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020457023.6U CN212296784U (en) | 2020-04-01 | 2020-04-01 | Piston pump with seal structure of closing earlier opens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020457023.6U CN212296784U (en) | 2020-04-01 | 2020-04-01 | Piston pump with seal structure of closing earlier opens |
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| Publication Number | Publication Date |
|---|---|
| CN212296784U true CN212296784U (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020457023.6U Active CN212296784U (en) | 2020-04-01 | 2020-04-01 | Piston pump with seal structure of closing earlier opens |
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| Country | Link |
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| CN (1) | CN212296784U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111336096A (en) * | 2020-04-01 | 2020-06-26 | 东莞力嘉塑料制品有限公司 | Piston pump with seal structure of closing earlier opens |
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2020
- 2020-04-01 CN CN202020457023.6U patent/CN212296784U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111336096A (en) * | 2020-04-01 | 2020-06-26 | 东莞力嘉塑料制品有限公司 | Piston pump with seal structure of closing earlier opens |
| CN111336096B (en) * | 2020-04-01 | 2025-01-17 | 东莞力嘉塑料制品有限公司 | Piston pump with first opening and then closing sealing structure |
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