CN215979820U - Rodless pump - Google Patents

Abstract

The application discloses a rodless pump, which comprises an isolator, a spring energy storage sealing element and a plurality of pump cylinders arranged at intervals along the length direction of the pump cylinders, wherein the isolator is arranged between two adjacent pump cylinders, the end surface of each pump cylinder, facing the isolator, and the end surface of each isolator, facing the pump cylinders are both provided with a sealing groove, the spring energy storage sealing element is arranged between the pump cylinders and the isolators, the energy-saving sealing device comprises a sealing jacket and an energy-storing spring, wherein the sealing jacket comprises a body, a first limiting ring and a second limiting ring which are formed by extending outwards from one side of the body and are arranged at intervals, the first limiting ring and the second limiting ring are enclosed into an opening, the ends of the first limiting ring and the second limiting ring, which are far away from the body, are respectively provided with a convex edge positioned in the opening, the energy-storing spring is limited and arranged in the opening, and the two opposite ends of the sealing sleeve are abutted and drive the first limiting ring and the second limiting ring to be respectively abutted to the respective groove bottoms of the two oppositely arranged sealing grooves, and the sealing sleeve and the energy storage spring are both high-temperature-resistant and corrosion-resistant structural members. Above-mentioned technical scheme can make and have better sealed effect between two terminal surfaces.

Description

Rodless pump

Technical Field

The application belongs to the technical field of oil exploitation, and particularly relates to a rodless pump.

Background

With the progress of technology, rodless pump oil production is widely adopted due to the characteristics of high efficiency, high lift and the like. In the existing rodless pump, sealing relations are generally required to be formed between end faces of components, at present, static sealing relations are generally formed by means of auxiliary end faces of components such as O-shaped sealing rings, however, in the working process of the rodless pump, due to the fact that the environment temperature where the rodless pump is located is high, work is performed on the rodless pump to generate heat, the temperature of the rodless pump is generally high, the high-temperature environment can cause the texture of the O-shaped rings to be soft, the O-shaped rings are extruded from end face gaps, and sealing failure is caused.

SUMMERY OF THE UTILITY MODEL

The purpose of the embodiment of this application is to provide a rodless pump to solve the high temperature environment and lead to the texture of O type circle to become soft and from the terminal surface clearance extruded, cause the problem of terminal surface sealing failure.

The embodiment of the application discloses a rodless pump, which comprises a breaker, a spring energy storage sealing element and a plurality of pump cylinders, wherein the pump cylinders are arranged at intervals along the length direction of the pump cylinders, the breaker is arranged between two adjacent pump cylinders, the end surfaces of the pump cylinders, facing the breaker, and the end surfaces of the breaker, facing the pump cylinders are provided with sealing grooves, the spring energy storage sealing element is arranged between the pump cylinders and the breaker, the spring energy storage sealing element comprises a sealing jacket and an energy storage spring, the sealing jacket comprises a body, a first limiting ring and a second limiting ring, the first limiting ring and the second limiting ring are formed by extending outwards from one side of the body, the first limiting ring and the second limiting ring are arranged at intervals and form an opening with the body, and one ends of the first limiting ring and the second limiting ring, which are far away from the body, are provided with convex edges, two protruding edge all is located in the opening, the energy storage spring set up in the opening, just the energy storage spring is spacing set up in protruding edge with between the body, energy storage spring's the back of the body both ends of mutually respectively the butt in first spacing ring with the second spacing ring, in order to drive first spacing ring with the second spacing ring butt respectively to two of relative setting the respective tank bottom of seal groove, seal the cover with the energy storage spring is high temperature resistant corrosion-resistant structure.

The embodiment of the application discloses a rodless pump, which comprises an isolator, a spring energy storage sealing element and a plurality of pump cylinders, wherein the pump cylinders are arranged at intervals along the length direction of the pump cylinders, the end face sealing relation is formed between the pump cylinders and the isolator by the spring energy storage sealing element extending into a sealing groove, and an energy storage spring in the spring energy storage sealing element can provide long-term and stable elastic acting force for a first limiting ring and a second limiting ring of a sealing jacket, so that the reliability and the durability of the sealing relation between two end faces sealed by the spring energy storage sealing element are ensured to be stronger; and, the sealing jacket and the energy storage spring of spring energy storage sealing member are high temperature resistant corrosion-resistant structure spare to in the course of the work of rodless pump, because the anticorrosive and high temperature resistant performance homogeneous phase of spring energy storage sealing member is relatively stronger, even if the operating mode of rodless pump is comparatively abominable, even if the environmental temperature that spring energy storage sealing member is located is higher all the time, also can not produce adverse effect to the sealing performance of spring energy storage sealing member basically, guarantee to have long-term and stable sealed relation between the terminal surface of two parts sealed through spring energy storage sealing member.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic structural diagram of a reversing valve body in a rodless pump according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of a reversing valve body in a rodless pump according to the teachings of the present disclosure;

FIG. 3 is a schematic diagram of a spring energized seal in a rodless pump according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a portion of a rodless pump including a reversing valve body according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a portion of a rodless pump including a second piston according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a composite seal in a rodless pump according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a portion of a rodless pump including a second piston rod according to an embodiment of the present disclosure;

FIG. 8 is a schematic cross-sectional view of a septum seal in a rodless pump according to an embodiment of the present disclosure;

fig. 9 is a schematic structural view of a partition seal in a rodless pump according to an embodiment of the present disclosure.

Description of reference numerals:

110-spring energy storage sealing element, 111-sealing jacket, 111 a-body, 111 b-first spacing ring, 111 c-second spacing ring, 111 d-convex edge, 112-energy storage spring, 120-annular rubber gasket, 131-Glare ring, 132-Style seal, 140-combined sealing element, 141-first base, 142-second base, 143-V type sealing part, 150-adjusting element, 160-dust ring, 170-partition sealing element, 171-partition ring, 171 a-notch, 172-sealing ring,

210-reversing valve body, 211-inner cavity, 212-sealing groove, 213-through hole, 221-first piston sleeve, 222-first piston, 231-reversing valve sleeve, 232-reversing piston rod, 241-locking sleeve, 242-reversing return piston, 251-second piston, 252-second piston sleeve, 253-second piston rod and 260-breaker.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The folding mechanism and the electronic device provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

As shown in fig. 1 to 9, the present embodiment discloses a rodless pump, which includes a spring-loaded seal 110, a breaker 260, and a plurality of pump cylinders, and of course, other components, such as a reversing valve and a sand trap, etc., are also included in the rodless pump, and will not be described in detail herein for brevity.

The pump cylinders are arranged at intervals along the length direction of the pump cylinders, and parameters such as the number and the size of the pump cylinders and the distance between the pump cylinders can be determined according to actual requirements, and are not limited here. The breaker 260 is provided between two adjacent pump cylinders, so that the two adjacent pump cylinders can be connected as a whole by the breaker 260. In addition, a fixed connection relationship may be formed between the pump cylinder and the breaker 260 by using a connector such as a bolt and a nut, and in this case, in order to ensure that the inner cavity of the pump cylinder has a good sealing property, a stable and reliable sealing relationship needs to be formed between the opposite end surfaces of the pump cylinder and the breaker 260.

In view of the above, in the present embodiment, both the end surface of the pump cylinder facing the breaker 260 and the end surface of the breaker 260 facing the pump cylinder are provided with seal grooves. Taking two pump cylinders and one breaker 260 as an example, specifically, the number, size and position of the sealing grooves formed on the respective end faces of the three parts can be determined correspondingly according to the specific conditions of each part, and under the condition that the number, size and position of the inner cavities on the part are different, the number, size and position of the sealing grooves on the end faces of each part are also different, so that the technical personnel in the field can determine correspondingly according to the actual conditions. Of course, the number, size and position of the sealing grooves formed on the two end faces oppositely arranged, such as the end face of the pump cylinder facing the breaker 260 and the end face of the breaker 260 facing the pump cylinder, which are matched with each other, are all the same correspondingly, so that a reliable sealing relationship can be formed between the two end faces.

And, in order to guarantee that the end surfaces corresponding to the pump cylinder and the breaker 260 can form a reliable sealing relationship, a spring energy storage sealing element 110 is arranged between the pump cylinder and the breaker 260, of course, the spring energy storage sealing element 110 arranged between a certain pump cylinder and the breaker 260 should be simultaneously matched with the corresponding sealing grooves on the respective end surfaces of the pump cylinder and the breaker 260, so as to guarantee that the spring energy storage sealing element 110 can form a sealing matching relationship with the sealing grooves on the two end surfaces respectively located in the pump cylinder and the breaker 260. In addition, when the number of the inner cavities 211 on the pump cylinder and the breaker is plural, a plurality of seal grooves are correspondingly provided, the spring energy accumulation seals 110 are disposed in the plurality of seal grooves one by one, and when the size of the seal groove is different, the specifications of the corresponding spring energy accumulation seals 110 are also different.

The spring energy storage sealing element 110 comprises a sealing jacket 111 and an energy storage spring 112, the sealing jacket 111 comprises a body 111a, and a first limiting ring 111b and a second limiting ring 111c which are formed by extending outwards from one side of the body 111a, and the first limiting ring 111b and the second limiting ring 111c are arranged at intervals and enclose an opening with the body 111 a. Specifically, the body 111a, the first limit ring 111b, and the second limit ring 111c are all annular structural members, so that the sealing jacket 111 can provide a complete sealing function between two end surfaces, and the body 111a, the first limit ring 111b, and the second limit ring 111c can be formed in an integrated manner, so as to improve the structural stability of the entire sealing jacket 111, and the first limit ring 111b and the second limit ring 111c are both located on the same side of the body 111a, preferably, the first limit ring 111b and the second limit ring 111c are respectively located on two opposite ends of the aforementioned side surface of the body 111a along the axial direction of the first limit ring 111b, so as to reduce the deformation degree of the first limit ring 111b and the second limit ring 111c as much as possible, and improve the service life and the sealing reliability of the first limit ring 111b and the second limit ring 111 c. The sizes of the first limiting ring 111b and the second limiting ring 111c can be determined according to actual conditions, the inner sides of the first limiting ring 111b and the second limiting ring 111c are both connected with the body 111a, and an interval is formed between the outer sides of the first limiting ring 111b and the second limiting ring 111c which are arranged at intervals, so that the energy storage spring 112 can be ensured to extend into and be accommodated into the opening through the interval.

Moreover, in order to ensure that the energy storage spring 112 can form a stable matching relationship with the sealing jacket 111, the ends of the first and second limiting rings 111b and 111c, which are away from the body 111a, are respectively provided with a protruding edge 111d, the two protruding edges 111d are both located in the opening, the energy storage spring 112 is arranged in the opening, and the energy storage spring 112 is limited between the protruding edges 111d and the body 111a, so that the energy storage spring 112 can be stably installed in the opening of the sealing jacket 111.

As described above, the energy storage spring 112 is disposed in the opening of the sealing jacket 111, so that the energy storage spring 112 can provide an expansion effect for the first limiting ring 111b and the second limiting ring 111c of the sealing jacket 111, and the opening of the sealing jacket 111 tends to expand, and when the spring energy storage sealing element 110 is matched with the two sealing grooves, the first limiting ring 111b and the second limiting ring 111c of the sealing jacket 111 can be respectively abutted and matched with the groove bottoms of the two sealing grooves in a one-to-one correspondence manner, so as to ensure that the region inside the spring energy storage sealing element 110 in the two sealing grooves can be stably isolated from the region outside the spring energy storage sealing element 110 in the sealing groove. In addition, when the spring energy storage sealing element 110 is used for providing sealing action for the end faces of the two components, the opening of the spring energy storage sealing element 110 can be made to face the side with higher pressure, so that under the action of higher pressure, the opening of the spring energy storage sealing element 110 can have a tendency of further expansion, and the sealing effect of the spring energy storage sealing element 110 is further improved.

Further, the sealing jacket 111 and the energy storage spring 112 are both high temperature resistant and corrosion resistant structural members, that is, both are made of high temperature resistant and corrosion resistant materials, so as to ensure that the whole spring energy storage sealing member 110 has high temperature resistant and corrosion resistant capabilities, and improve the service life and sealing performance thereof. Furthermore, the sealing jacket 111 is a teflon structure, that is, the sealing jacket 111 can be made of teflon, which enables the spring energy storage sealing element 110 to have excellent high temperature resistance, corrosion resistance, wear resistance and self-lubrication, thereby ensuring that the spring energy storage sealing element 110 can still have good sealing performance even if working for a long time under severe conditions such as high temperature. The energy storage spring 112 is a stainless steel structure, that is, the energy storage spring 112 is made of a stainless steel material, so that the energy storage spring 112 has strong corrosion resistance and high temperature resistance, and the comprehensive performance of the spring energy storage sealing element 110 is improved. In the process of installing the spring energy storage sealing element 110, the convex edge 111d of the sealing jacket 111 can be driven by the energy storage spring 112 to abut against the groove bottom of the sealing groove by virtue of the elastic acting force of the energy storage spring 112, so that a long-term stable and reliable sealing effect is provided for two oppositely arranged end faces.

The embodiment of the application discloses a rodless pump, which comprises a breaker 260, a spring energy storage sealing element 110 and a plurality of pump cylinders, wherein the pump cylinders are arranged at intervals along the length direction of the pump cylinders, the end face sealing relation is formed between the pump cylinders and the breaker 260 by the spring energy storage sealing element 110 extending into a sealing groove, and an energy storage spring 112 in the spring energy storage sealing element 110 can provide long-term and stable elastic acting force for a first limiting ring 111b and a second limiting ring 111c of a sealing jacket 111, so that the reliability and the durability of the sealing relation between two end faces sealed by the spring energy storage sealing element 110 are ensured to be stronger; moreover, the sealing jacket 111 and the energy storage spring 112 of the spring energy storage sealing element 110 are both high-temperature-resistant and corrosion-resistant structural members, so that in the working process of the rodless pump, as the corrosion resistance and the high-temperature resistance of the spring energy storage sealing element 110 are both relatively strong, even if the working condition of the rodless pump is severe, even if the environmental temperature of the spring energy storage sealing element 110 is always high, the adverse effect on the sealing performance of the spring energy storage sealing element 110 is basically avoided, and the long-term and stable sealing relationship between the end surfaces of the two parts sealed by the spring energy storage sealing element 110 is ensured.

As above, the rodless pump further comprises a reversing valve and a sand setting device, wherein the reversing valve is arranged on one side, away from the breaker 260, of each pump cylinder, and the sand setting device is arranged on one side, away from the pump cylinder, of each reversing valve. Furthermore, the reversing valve and the sand settler are usually also in end face sealing relationship when connected to the pump barrel, and based on this, optionally, the end face of the sand settler facing the reversing valve and the end face of the reversing valve facing the sand settler, and the end face of the reversing valve facing the pump barrel are provided with sealing grooves. Specifically, similar to the above embodiments, the number, size and position of the sealing grooves formed on the sand trap and the reversing valve are related to the specific situation of the inner cavity on the corresponding component, and are not limited herein.

In addition, in order to ensure that the parts can also form a long-term and stable sealing relationship, end face sealing relationships are formed between the sand setting device and the reversing valve and between the reversing valve and the pump barrel through the spring energy storage sealing element 110 which is abutted against the sealing groove. In the present embodiment, the structure and material of the spring energy storage sealing element 110 may be the same as those of the spring energy storage sealing element 110 mentioned in the above embodiments. Similarly, when the spring energized seal 110 is installed, the opening of the spring energized seal 110 may be directed to the high pressure side in order to further enhance the sealing effect. In addition, in the design process, the size of the sealing groove on the end face of the component can be correspondingly determined according to the specific size of the sealing groove.

As mentioned above, the rodless pump generally includes components other than those mentioned above, for example, the rodless pump includes the direction valve body 210, and the first piston sleeve 221 and the direction valve sleeve 231 may be installed in the direction valve body 210. Specifically, the rodless pump is provided with an inner cavity 211, and the first piston sleeve 221 and the diverter valve sleeve 231 are both mounted in the inner cavity 211. The first piston sleeve 221 and the reversing valve body 210 can be fixed to each other in a hot connection manner, so that an interference fit relationship is formed between the first piston sleeve 221 and the reversing valve body 210, and a sealing connection relationship is formed between the first piston sleeve 221 and the reversing valve body 210.

The direction change valve sleeve 231 is spaced apart from the first piston sleeve 221 with a certain distance in the axial direction of the first piston sleeve 221, so that a chamber is formed, which is a first pressure chamber. Furthermore, a first piston 222 is slidably disposed in the first piston sleeve 221, a reversing valve piston rod is slidably disposed in the reversing valve sleeve 231, and the first piston 222 and the reversing valve piston rod are both movable components for transmitting power. The reversing valve body 210 is provided with a through hole 213 capable of controlling opening and closing at a position corresponding to the first pressure chamber, so as to convey liquid into the first pressure chamber through the through hole 213, wherein the liquid can provide driving action and transmission action, and the liquid can be water.

In order to ensure that the first pressure chamber has higher sealing performance, further, because the spring energy storage sealing element 110 has stronger pressure-bearing performance, and the gap between the first piston 222 and the first piston sleeve 221, and the gap between the reversing valve sleeve 231 and the reversing valve body 210 are both communicated with the first pressure chamber, then, the spring energy storage sealing element 110 may be respectively arranged between the first piston 222 and the first piston sleeve 221, and between the reversing valve sleeve 231 and the reversing valve body 210, and the structure and material of the spring energy storage sealing element 110 may be correspondingly the same as those of the spring energy storage sealing element 110 in the above embodiment. Of course, slots are also required to be formed between the first piston 222 and the first piston sleeve 221, and between the reversing valve sleeve 231 and the reversing valve body 210 at positions corresponding to the positions of the spring energy storage seal 110, so that the spring energy storage seal 110 is stably installed at the corresponding positions.

In addition, a corresponding gap also exists between the reversing valve sleeve 231 and the reversing valve piston rod, and because the space between the two is relatively small, in order to ensure the integrity of the sealing condition of the first pressure chamber, optionally, an annular rubber gasket 120 is arranged between the reversing valve sleeve 231 and the reversing valve piston rod, the annular rubber gasket 120 can provide a reliable sealing effect for the reversing valve sleeve 231 and the reversing valve piston rod, and because the gap between the reversing valve sleeve 231 and the reversing valve piston rod does not substantially permeate oil and other impurities, usually only is driving liquid, the service life of the annular rubber gasket 120 is relatively long, and the cost is relatively low.

Further, in the above embodiment, in order to secure the sealing reliability of the spring charge seal 110, the opening of the spring charge seal 110 provided between the direction change valve sleeve 231 and the direction change valve body 210 may be directed toward the first pressure chamber. Since the side of the spring energy storage seal 110 between the first piston 222 and the first piston sleeve 221 facing away from the first pressure chamber is also usually a high-pressure side, in view of this, the opening of the spring energy storage seal 110 between the first piston 222 and the first piston sleeve 221 is arranged facing away from the first pressure chamber, so as to ensure that the liquid on the side of the spring energy storage seal 110 between the first piston 222 and the first piston sleeve 221 facing away from the first pressure chamber does not permeate into the first pressure chamber, and maintain the cleanliness of the driving liquid.

Based on the above embodiment, a plurality of auxiliary sealing members are disposed between the portion of the first piston 222 located at the spring energy storage sealing member 110 close to the reversing valve sleeve 231 and the first piston sleeve 221, so that the stability of the sealing relationship between the first piston 222 and the first piston sleeve 221 is further improved by the plurality of auxiliary sealing members, and the communication between the inside and the outside of the first pressure chamber is prevented.

Also, since there is frequent relative movement between the first piston 222 and the first piston sleeve 221, in order to ensure that the stability and long-term stability of the sealing relationship therebetween are relatively good, optionally, the auxiliary seal comprises at least one of the greige ring 131 and the steiner 132. In application, both the glad ring 131 and the stet seal 132 may be used as a sealing member between shaft hole structures, and in the process of installing the glad ring 131 and the stet seal 132, it is necessary to form a sealing groove 212 on the surface wall of the shaft or the hole, in which case, when the sealing groove 212 is formed on the shaft (e.g., the first piston 222), the glad ring 131 may be installed in the sealing groove 212, whereas, when the sealing groove 212 is formed on the hole (e.g., the first piston sleeve 221), the stet seal 132 may be installed in the sealing groove 212.

Specifically, the auxiliary sealing element includes a sliding sealing ring and an annular rubber pad which are connected with each other, an inner side surface of the sliding sealing ring is in sliding fit with a surface of the first piston 222 (or the first piston sleeve 221), the annular rubber pad is arranged on an outer side of the sliding sealing ring, and the annular rubber pad can generate certain elastic deformation, so that the whole auxiliary sealing element is extruded between the first piston 222 and the first piston sleeve 221, and under the action of the annular rubber pad, the sliding sealing ring can be more attached to the surface of the first piston 222 (or the first piston sleeve 221), so as to further improve the sealing performance of the auxiliary sealing element. In order to improve the overall performance of the secondary seal, the material of the sliding seal ring optionally comprises polytetrafluoroethylene and graphite, which results in better wear resistance and self-lubrication of the sliding seal ring.

As above, the rodless pump typically includes components in addition to those mentioned above, for example, the rodless pump includes a locking sleeve 241, the locking sleeve 241 being disposed in the reversing valve body 210. Specifically, similar to the reversing valve sleeve 231 and the first piston sleeve 221, the locking sleeve 241 is also disposed in the inner cavity 211 of the reversing valve body 210, and the locking sleeve 241 is disposed on a side of the reversing valve sleeve 231 facing away from the first piston sleeve 221, and the locking sleeve 241 and the reversing valve body 210 may be connected to each other in a thermal connection manner, and are in interference fit with each other, so that there is substantially no gap between the locking sleeve 241 and the reversing valve body 210, and a good sealing relationship is formed. As above, the reversing piston rod 232 slidably disposed in the reversing valve sleeve 231 can be driven by the driving fluid, wherein a first pressure chamber is disposed on a side of the reversing piston rod 232 close to the first piston 222, and based on this, a second pressure chamber is disposed between the locking sleeve 241 and the reversing valve sleeve 231, that is, a second pressure chamber is disposed on a side of the reversing piston rod 232 away from the first piston 222, and the second pressure chamber can also be communicated with the driving fluid through the through hole 213 on the reversing valve body 210, so as to achieve the purpose of controlling the action of the reversing piston rod 232 by controlling the pressures of the first pressure chamber and the second pressure chamber.

A reversing return piston 242 is slidably disposed within the locking sleeve 241, and the reversing return piston 242 is one of the driving devices in the rodless pump cylinder, and the reversing return piston 242 is also movable relative to the reversing valve body 210. Similarly, the second pressure chamber also needs to have a sealing capability, wherein the through hole 213 of the reversing valve body 210 communicating with the second pressure chamber is a through hole 213 capable of opening and closing controllably. Moreover, two spring energy storage sealing elements 110 are arranged between the reversing valve body 210 and the reversing valve sleeve 231, and the openings of the two spring energy storage sealing elements 110 are arranged in an opposite manner, so that the reversing valve sleeve 231 and the first pressure chamber and the second pressure chamber on the opposite sides of the reversing valve sleeve 231 can form a reliable sealing relationship under the action of the two spring energy storage sealing elements 110. Meanwhile, a spring energy storage sealing element 110 is arranged between the locking sleeve 241 and the reversing return piston 242, so that the second pressure chamber can form a complete sealing working condition.

Further, since the side of the locking sleeve 241 facing away from the direction change valve sleeve 231 is also the high pressure side, in order to prevent the liquid in the aforementioned high pressure side from extending into the second pressure chamber, the opening of the spring energy storage seal 110 arranged between the locking sleeve 241 and the direction change return piston 242 is arranged facing away from the second pressure chamber. Based on this, in order to further improve the sealing reliability of the second pressure chamber, the outer wall of the reversing return piston 242 is provided with at least one sealing groove 212, each sealing groove 212 is located on one side of the spring energy storage sealing element 110 close to the reversing valve sleeve 231, and the sealing groove 212 of the reversing return piston 242 is provided with the greige ring 131, so that the sealing relationship between the locking sleeve 241 and the reversing return piston 242 is further supplemented by the greige ring 131, and the second pressure chamber is ensured not to be communicated with the outside of the second pressure chamber.

As described above, the rodless pump generally includes components other than the above-mentioned components, for example, the rodless pump further includes the second piston 251, the second piston sleeve 252, and the second piston rod 253, the second piston 251 is slidably disposed in the second piston sleeve 252, one end of the second piston 251 is connected to the second piston rod 253, and a linkage relationship is formed between the second piston 251 and the second piston rod 253. Because one side of the second piston 251, which is away from the second piston rod 253, is usually in contact with the produced liquid, further, in order to ensure that a better isolation effect is provided between the two opposite sides of the second piston 251, a spring energy storage sealing member 110 is arranged between the second piston 251 and the second piston sleeve 252, and an opening of the spring energy storage sealing member 110 is away from one side of the second piston rod 253, so that under the pressure action of the produced liquid, the sealing effect of the spring energy storage sealing member 110 is improved, and the produced liquid can be prevented from permeating into one side of the second piston rod 253 in the second piston 251. Of course, during the process of installing the spring energy storage seal 110, it is also necessary to form the seal groove 212 on the second piston 251 or the second piston sleeve 252, and specifically, the seal groove 212 may be formed on the outer wall of the second piston 251.

In order to further improve the reliability of the sealing effect between the second piston 251 and the second piston sleeve 252, a combined seal 140 is further disposed between the portion of the spring energy storage seal 110 of the second piston 251 near the second piston rod 253 and the second piston sleeve 252. In detail, in addition to the spring energy storage seal 110, a combined seal 140 is further disposed between the second piston rod 253 and the second piston sleeve 252, the combined seal 140 is located on a side of the spring energy storage seal 110 close to the second piston rod 253, and the combined seal 140 is an annular structural member, so that the sealing reliability between the second piston sleeve 252 and the second piston 251 can be further improved by adding the combined seal 140.

Further, the combination seal 140 includes a first base portion 141, a second base portion 142, and a plurality of V-shaped seal portions 143, the first base portion 141 and the second base portion 142 are disposed at intervals in the axial direction of the second piston 251, the plurality of V-shaped seal portions 143 are disposed in a stacked manner between the first base portion 141 and the second base portion 142, and each V-shaped seal portion 143 is opened toward the side where the spring energy storage seal 110 is located. The inner sides of the V-shaped sealing portions 143 can be attached to the first piston 222, the outer sides of the V-shaped sealing portions 143 can be attached to the first piston sleeve 221, the combined sealing member 140 has high sealing reliability under the combined action of the V-shaped sealing portions 143, the opening of the V-shaped sealing portion 143 faces the side where the spring energy storage sealing member 110 is located, and the V-shaped sealing portion 143 can be further expanded by utilizing the pressure of the side, away from the second piston rod 253, of the second piston 251, so that the sealing effect is maximized.

More specifically, the V-shaped sealing portion 143 is an annular structure, and the shape of a cross section of the V-shaped sealing portion 143 taken by a plane passing through an axis thereof is substantially the shape of a letter V having an opening at one side thereof to provide a consolidation effect for the sealing relationship between the second piston 251 and the second piston housing 252 by the aforementioned structure of such a shape. The specific size of the V-shaped seal portion 143 is not limited here. Optionally, each V-shaped sealing portion 143 is a peek structure, that is, the V-shaped sealing portion 143 is made of peek, which makes the V-shaped sealing portion 143 have better wear resistance, self-lubrication, and corrosion resistance, and can improve the sealing effect and the service life thereof.

The first base portion 141 and the second base portion 142 are respectively arranged at two opposite ends of the plurality of V-shaped sealing portions 143, both of the first base portion 141 and the second base portion 142 are both of an annular structure, and surfaces of the first base portion 141 and the second base portion 142, which face away from the V-shaped sealing portions 143, can be planes, so that the two sealing portions have a good abutting limiting effect, wherein one end surface of the first base portion 141, which faces away from the second base portion 142, can be abutted and matched with the spring energy storage sealing element 110, and one end surface of the second base portion 142, which faces away from the first base portion 141, can be abutted and matched with an end surface of the sealing groove 212 formed in the second piston 251, so that the combined sealing element 140 and the spring energy storage sealing element 110 are clamped in the sealing groove 212. And the structure of the end of each of the first base 141 and the second base 142 facing the V-shaped sealing portion 143 may be adaptively designed corresponding to the shape of the V-shaped sealing portion 143, for example, the end of the first base 141 facing the V-shaped sealing portion 143 may be provided with a protrusion, and the protrusion is made to protrude into the opening of the V-shaped sealing portion 143, so that the fitting relationship between the first base 141 and the V-shaped sealing portion 143 is more stable. Similarly, the structure of the end of the second base portion 142 facing the V-shaped sealing portion 143 may be provided with a sinking groove, and the end of the V-shaped sealing portion 143 facing away from the opening thereof extends into the sinking groove, so as to improve the stability of the fit between the V-shaped sealing portion 143 and the second base portion 142. In addition, the first base 141 and the second base 142 may be made of polyetheretherketone.

As above, the V-shaped sealing portion 143 is an annular structure, and the V-shaped sealing portion 143 may be made of polyetheretherketone, because the polyetheretherketone is hard, in order to reduce the difficulty in assembling the composite sealing member 140 and the second piston 251, optionally, each V-shaped sealing portion 143 is provided with a notch extending to two opposite ends of the V-shaped sealing portion 143 in the axial direction of the second piston 251, so that each V-shaped sealing portion 143 may be formed into an open annular structure, and thus, in the process of installing the V-shaped sealing portion 143, a certain amount of deformation may be generated in the V-shaped sealing portion 143, thereby reducing the difficulty in installing the V-shaped sealing portion 143.

Furthermore, the notches may extend spirally around the axial direction of the second piston 251, and the notches of any two adjacent V-shaped sealing portions 143 are arranged at intervals along the circumferential direction of the second piston 251, so that the notches of the V-shaped sealing portions 143 are not substantially arranged oppositely, a labyrinth structure is formed by the plurality of V-shaped sealing portions 143, and the sealing effect generated by the plurality of V-shaped sealing portions 143 provided with the notches is maximally improved. Specifically, the angle of the notch may be 10 to 80 °, and those skilled in the art may select the notch according to actual situations, which is not limited herein.

In order to further improve the sealing effect of the combination seal 140, optionally, an adjusting member 150 is further disposed between the spring energy storage seal 110 and the combination seal 140 at the second piston 251 and the second piston sleeve 252, the adjusting member 150 is in threaded connection with the second piston 251, and the combination seal 140 and the adjusting member 150 are disposed in a pressing manner along the axial direction of the second piston 251. Specifically, the adjusting member 150 may be a nut, so that the adjusting member 150 can be mounted on the second piston 251 by means of screw connection by providing an external thread on the second piston 251. As described above, the spring energy storage seal 110 and the combined seal 140 are both installed in the seal groove 212 of the second piston 251, and by controlling the screwing size of the adjusting member 150, the distance between the adjusting member 150 and the groove wall of the seal groove 212 can be controlled, and further by pressing the plurality of V-shaped seals 143, the size of the combined seal 140 in the axial direction of the second piston 251 is changed, and when the plurality of V-shaped seals 143 are in a pressed state, the sealing performance of the V-shaped seals 143 against the second piston 251 and the second piston sleeve 252 can be further enhanced.

As above, the rodless pump includes the second piston rod 253, and the second piston rod 253 is connected with the second piston 251, and there is a linkage relationship therebetween. The second piston rod 253 is slidably disposed in the breaker 260, and at least two dust rings 160 spaced from each other are disposed between the second piston rod 253 and the breaker 260, so that external impurities are prevented from entering a gap between the portions where the second piston rod 253 and the breaker 260 are fitted to each other through the dust rings 160, and the fitting stability between the second piston rod 253 and the breaker 260 is ensured. The dust ring 160 may include a sliding sealing ring and an annular rubber pad connected to each other, and the material of the sliding sealing ring includes teflon, so as to ensure that the dust ring 160 has a strong sealing effect and a long service life. Of course, the material of the sliding seal ring may also include graphite to promote wear resistance and self-lubricity of the sliding seal ring. The annular rubber cushion can be a fluorine rubber structural member.

In order to further improve the sealing effect between the second piston rod 253 and the breaker 260, a plurality of partition sealing members 170 are disposed between two adjacent dust rings 160, the plurality of partition sealing members 170 are distributed along the axial direction of the second piston rod 253, each partition sealing member 170 includes a partition ring 171 and a sealing ring 172, the sealing ring 172 is sleeved on the outer periphery of the partition ring 171, the partition ring 171 is a polyetheretherketone structural member, and the sealing ring 172 is a fluororubber structural member. The partition right and the sealing ring are both circular ring-mounted structural members, and when the partition sealing member 170 is installed between the second piston rod 253 and the partition 260, a mutual extrusion effect can be generated between the sealing ring 172 and the partition ring 171, so that the partition ring 171 which moves relative to the second piston rod 253 can still hold the second piston rod 253 tightly, and a further sealing effect is provided for the second piston rod 253.

Further, the periphery of the partition ring 171 is provided with a groove, and a part of the sealing ring 172 is accommodated in the groove, so that a certain limiting and accommodating effect is provided for the sealing ring 172 by means of the groove, and when the partition ring 171 and the second piston rod 253 move relatively, a relatively strong fixing effect between the partition ring 171 and the sealing ring 172 is ensured, and the sealing effect of the partition sealing element 170 is further improved.

As described above, the partition ring 171 is an annular structure, and the partition ring 171 may be made of polyetheretherketone, because the polyetheretherketone is hard, on the basis of this, in order to reduce the difficulty in assembling between the partition seal 170 and the second piston rod 253, optionally, each partition ring 171 is provided with a notch 171a extending to two opposite ends of the partition ring 171 along the axial direction of the second piston rod 253, so that each partition ring 171 may be formed into an open annular structure, and thus, in the process of installing the partition ring 171, a certain amount of deformation may be generated in the partition ring 171, thereby reducing the difficulty in installing the partition ring 171.

Furthermore, the notches 171a may be spirally extended around the axial direction of the second piston rod 253, and the notches of any two adjacent partition rings 171 are spaced apart from each other in the circumferential direction of the second piston rod 253, so that the notches of the partition rings 171 are not substantially disposed opposite to each other, a labyrinth structure is formed by the partition rings 171, and the sealing effect of the partition rings 171 provided with the notches is maximally improved. Specifically, the angle of the notch 171a may be 10 to 90 °, which can be selected by a person skilled in the art according to practical situations and is not limited herein.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A rodless pump is characterized by comprising a breaker, a spring energy storage sealing element and a plurality of pump cylinders, wherein the pump cylinders are arranged at intervals along the length direction of the pump cylinders, the breaker is arranged between two adjacent pump cylinders, the end faces, facing the breaker, of the pump cylinders and the end faces, facing the pump cylinders, of the breaker are provided with sealing grooves, the spring energy storage sealing element is arranged between the pump cylinders and the breaker and comprises a sealing jacket and an energy storage spring, the sealing jacket comprises a body, a first limiting ring and a second limiting ring, the first limiting ring and the second limiting ring are formed by extending outwards from one side of the body, the first limiting ring and the second limiting ring are arranged at intervals and form an opening with the body in a surrounding mode, and one ends, facing away from the body, of the first limiting ring and one end, facing away from the body, of the second limiting ring are provided with convex edges, two protruding edge all is located in the opening, the energy storage spring set up in the opening, just the energy storage spring is spacing set up in protruding edge with between the body, energy storage spring's the back of the body both ends of mutually respectively the butt in first spacing ring with the second spacing ring, in order to drive first spacing ring with the second spacing ring butt respectively to two of relative setting the respective tank bottom of seal groove, seal the cover with the energy storage spring is high temperature resistant corrosion-resistant structure.

2. The rodless pump according to claim 1, comprising a reversing valve and a sand trap, wherein the reversing valve is disposed on a side of each pump barrel facing away from the breaker, the sand trap is disposed on a side of the reversing valve facing away from the pump barrel, an end face of the sand trap facing the reversing valve and an end face of the reversing valve facing the sand trap are disposed on an end face of the reversing valve facing toward the pump barrel, and a seal groove is disposed on an end face of the reversing valve facing toward the pump barrel, and a spring energy storage seal abutting against the seal groove forms an end face seal relationship between the sand trap and the reversing valve and between the reversing valve and the pump barrel.

3. The rodless pump according to claim 1, comprising a direction valve body having a first piston sleeve and a direction valve sleeve spaced apart from each other, a first pressure chamber being interposed between the first piston sleeve and the direction valve sleeve, a first piston slidably disposed in the first piston sleeve, and a direction valve piston rod slidably disposed in the direction valve sleeve, wherein,

the spring energy storage sealing element is arranged between the first piston and the first piston sleeve and between the reversing valve sleeve and the reversing valve body, and an annular rubber pad is arranged between the reversing valve sleeve and the reversing valve piston rod.

4. The rodless pump of claim 3, wherein an opening of a spring-loaded seal between the first piston and the first piston sleeve is disposed away from the first pressure chamber, and a plurality of secondary seals are disposed in the first piston between a portion of the spring-loaded seal proximate the reversing valve sleeve and the first piston sleeve, the secondary seals including at least one of a GREEN and a STYLE seal.

5. The rodless pump according to claim 3, wherein a locking sleeve is disposed on a side of the reversing valve sleeve facing away from the first piston sleeve, a second pressure chamber is disposed between the locking sleeve and the reversing valve sleeve, two spring energy storage sealing members are disposed between the reversing valve body and the reversing valve sleeve, openings of the two spring energy storage sealing members are disposed opposite to each other, a reversing return piston is slidably disposed in the locking sleeve, the spring energy storage sealing member is disposed between the locking sleeve and the reversing return piston, and an opening of the spring energy storage sealing member is disposed opposite to the second pressure chamber;

the outer wall of the reversing return piston is provided with at least one sealing groove, each sealing groove is located on one side, close to the reversing valve sleeve, of the spring energy storage sealing element, and the sealing groove of the reversing return piston is provided with a Glare ring.

6. The rodless pump according to claim 1, comprising a second piston, a second piston sleeve, and a second piston rod, wherein the second piston is slidably disposed in the second piston sleeve, one end of the second piston is connected to the second piston rod, the spring energy storage seal is disposed between the second piston and the second piston sleeve, and an opening of the spring energy storage seal faces away from a side where the second piston rod is located.

7. The rodless pump according to claim 6, wherein a combination seal is further disposed between a portion of the spring-energized seal on the second piston, which is close to the second piston rod, and the second piston sleeve, the combination seal is an annular structure, the combination seal includes a first base portion, a second base portion, and a plurality of V-shaped seal portions, the first base portion and the second base portion are spaced apart in an axial direction of the second piston, the plurality of V-shaped seal portions are disposed between the first base portion and the second base portion in a stacked manner, an opening of each V-shaped seal portion faces a side of the spring-energized seal, and each V-shaped seal portion is a polyetheretherketone structure.

8. The rodless pump according to claim 7, wherein each of the V-shaped seals has notches extending to opposite ends of the V-shaped seal in an axial direction of the second piston, the notches extend spirally around the axial direction of the second piston, and the notches of any two adjacent V-shaped seals are spaced apart from each other in a circumferential direction of the second piston;

and an adjusting piece is further arranged between the spring energy storage sealing piece and the combined sealing piece, the adjusting piece is in threaded connection with the second piston, and the combined sealing piece and the adjusting piece are arranged in an axial extrusion mode along the second piston.

9. The rodless pump according to claim 6, wherein the second piston rod is slidably disposed in the breaker, at least two dust rings are disposed between the second piston rod and the breaker, the at least two dust rings are spaced from each other, a plurality of partition sealing members are disposed between two adjacent dust rings, the plurality of partition sealing members are distributed along an axial direction of the second piston rod, each partition sealing member includes a partition ring and a sealing ring, the sealing ring is disposed on an outer periphery of the partition ring, the partition ring is a polyetheretherketone structural member, and the sealing ring is a fluororubber structural member.

10. The rodless pump of claim 9, wherein the spacer ring has a groove in an outer periphery thereof, and a portion of the seal ring is received in the groove;

each isolating ring is provided with a notch extending to the opposite ends of the isolating ring along the axial direction of the second piston rod, the notches are spirally extended around the axial direction of the second piston rod, and the notches of any two adjacent isolating rings are arranged at intervals along the circumferential direction of the second piston rod.

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