Novel integrated valve element special for reciprocating plunger pump and plunger pump

Abstract

The utility model discloses a novel integrated valve core special for a reciprocating plunger pump and the plunger pump, the integrated valve core comprises a valve core main body and a valve rod, the valve core main body and the valve rod are integrally connected, and the valve core main body is an arc body; a reinforcing rod is arranged between the valve element body and the valve rod, the outer diameter of the reinforcing rod is the same as that of the valve element body, and the outer diameter of the reinforcing rod is larger than that of the valve rod. The integrated thinking is adopted, combination and addition are applied, the valve element and the valve rod which are in an original separated state are combined into a whole, the reinforcing rod and the valve element body are the same in outer diameter, the strength of the valve element body can be improved, and the service life of the integrated valve element is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pumps, in particular to a novel integrated valve core and a plunger pump specially used for a reciprocating plunger pump. Background Art

[0002] As a key equipment for pumping polymer media, the operation of the injection pump can be divided into two parts: the liquid inlet stage and the liquid discharge stage. ① Liquid inlet stage: When the plunger moves a certain distance backward from the front dead point, the polymer mother liquid in the working chamber is subjected to tensile pressure and reduced. When the pressure in the working chamber is lower than the inlet pressure, the liquid inlet valve of the working chamber opens and the polymer mother liquid enters the working chamber. When the plunger moves to the rear dead point, the liquid inlet to the working chamber stops and the liquid inlet valve closes. ② Liquid discharge stage: When the plunger moves forward from the rear dead point, the polymer mother liquid in the working chamber is compressed and the pressure increases. When the pressure in the working chamber reaches the limit, the liquid discharge valve opens and the polymer mother liquid is discharged from the working chamber. When the plunger reaches the front dead point, the liquid discharge stops, and the cycle continues.

[0003] During the injection process of the polymer injection well, the volumetric efficiency of the polymer injection pump decreases and the injection cannot be completed. It is necessary to clean the valve and replace the valve assembly. The currently commonly used valve assembly is a split ball valve, which is mainly composed of a ball core, a valve stem and a valve spring. During the operation of the pump, due to the structural defects of the ball valve, the valve spring breaks frequently, the frequency of pump shutdown maintenance is high, and multiple rounds of pump shutdown cause unstable injection of polymer solution, affecting the stable formation of slugs. At the same time, before replacing the valve core, the excess polymer solution in the pump chamber needs to be discharged, resulting in excessive waste of the original liquid, and the treatment of waste liquid also increases maintenance costs.

[0004] Overall, the performance stability of the currently used split ball valves is poor, resulting in increased maintenance costs and frequent pump shutdowns, which directly affects the injection quality and becomes one of the unfavorable factors restricting the effectiveness of polymer flooding development.

[0005] Currently, split ball valves have three major technical shortcomings and deficiencies during use and disassembly: ① During valve cleaning and disassembly, the pump head gland is overtightened, resulting in a small pump chamber. This requires specialized tools to remove the valve assembly, which is time-consuming and labor-intensive. This process requires the collaboration of approximately two employees and takes approximately 45 minutes. ② The valve spring of split ball valves is unstable and prone to breakage. Because the valve core and stem are separate, the stem moves up and down in an irregular manner, which can easily cause uneven force on the valve spring and breakage. This can lead to long-term deformation of the valve assembly, making it difficult to remove the damaged component from the pump chamber. A crowbar is required, but this can easily slip during prying, causing physical injury to the valve cleaning personnel and making it extremely unsafe. ③ Broken valve spring components can be discharged into the manifold along with the mother liquor, leading to blockage of the flowmeter or significant metering errors, directly affecting the quality and effectiveness of polymer injection.

[0006] Announcement No.: CN221003096U discloses a one-way valve assembly, comprising a valve body provided with a water inlet and a water outlet, a water flow channel connected between the water inlet and the water outlet, a valve core provided in the valve body, and an elastic member biasing the valve core, wherein the valve core has a first position that blocks the water flow channel and a second position that does not block the water flow channel; the valve core comprises a head that abuts against the valve body, a rod connected to the head, and a spiral feature provided on the head, wherein the spiral feature is provided on the end face of the head near the water inlet. By providing the spiral feature on the head of the valve core, water entering from the water inlet flows through the spiral feature, which can drive the valve core to rotate, so that the head of the valve core adaptively pivots during contact with the valve body, and the entire head surface has high consistency, good sealing performance, and more uniform wear.

[0007] The valve body of the prior art has low strength and is easily damaged and fails during repeated movement and collision.

[0008] Announcement No.: CN207093364U, discloses an injection pump valve and an injection pump valve group, including a valve seat, a sleeve, a valve cover, a valve core, an elastic member and a ball. The sleeve is made of 1Cr 18Ni 9Ti material and is connected to the valve seat and the valve cover respectively. A first through hole is opened in the valve cover, and the valve core extends into the first through hole. A second through hole is opened in the valve seat, and the ball is located between the second through hole and the valve core. The wall of the sleeve is provided with at least one third through hole connected to the outside world. When no liquid flows in, the ball blocks the second through hole. When liquid flows in from the second through hole, the elastic member is compressed under the action of the liquid pressure to cause the ball to drop. The second through hole is connected to the barrel cavity of the sleeve, and the liquid flows out from the third through hole, realizing the function of the injection pump valve.

[0009] The prior art, namely the split-type spherical valve, has technical problems such as difficulty in assembly and disassembly, poor stability, and easy damage to the valve spring.

[0010] Publication number: CN110043699A, discloses an ultra-high pressure one-way valve device, including a shell composed of an outer thread connector body and an inner thread connector body, and a valve body composed of a semi-circular solid coaxial body, a grid-shaped hollow coaxial body, and an elastic member. Through the unique two-piece valve body design, combined with the circular arc solid coaxial body and the thick-walled hollow coaxial body with several annular through holes, under the action of spring expansion connection, they are perfectly combined into a valve core body, thereby solving the problem that traditional one-way valves can only be installed vertically up and down.

[0011] The valve body of the prior art has low strength and is easily damaged and fails during repeated movement and collision.

[0012] In short, the technical solutions of the above-disclosed technologies, the technical problems to be solved and the beneficial effects produced are all different from those of the present utility model. Regarding the more technical features, technical problems to be solved and the beneficial effects of the present utility model, the above-disclosed technical documents do not provide any technical inspiration. Utility Model Content

[0013] In view of the above-mentioned defects in the prior art, the purpose of the present invention is to provide a new integrated valve core and a plunger pump specifically for a reciprocating plunger pump.

[0014] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0015] On the one hand, the utility model provides a new integrated valve core specially designed for reciprocating plunger pumps, including a valve core body and a valve stem. The valve core body and the valve stem are integrally connected, and the valve core body is an arc body; a reinforcement rod is arranged between the valve core body and the valve stem, and the outer diameter of the reinforcement rod is the same as the outer diameter of the valve core body, and the outer diameter of the reinforcement rod is larger than the outer diameter of the valve stem.

[0016] Furthermore, the valve core body is an ellipsoid.

[0017] Furthermore, a valve spring clamping ring is provided between the reinforcing rod and the valve stem, the outer diameter of the valve spring clamping ring is smaller than the outer diameter of the reinforcing rod, and the outer diameter of the valve spring clamping ring is larger than the outer diameter of the valve stem.

[0018] Furthermore, the valve spring clamping ring is interference fit with the inner ring of the valve spring end.

[0019] On the second aspect, the utility model provides a reciprocating plunger pump, including a cylinder and a pump body, the cylinder being connected to the side wall of the pump body, a plunger being arranged in the cylinder, the pump body being provided with a liquid inlet and a liquid outlet, an inlet valve group being arranged at one end of the pump body close to the liquid inlet, and an outlet valve group being arranged at one end of the pump body close to the liquid outlet; the inlet valve group and the outlet valve group are both provided with the new integrated valve core specially designed for the reciprocating plunger pump described in the first aspect.

[0020] Furthermore, a packing seat is provided on the inner wall of one end of the cylinder away from the pump body, a sealing packing is provided in the packing seat, a pressure cap is sleeved on the plunger, a pressure ring is provided between the pressure cap and the sealing packing, and the pressure cap is connected to the end of the cylinder.

[0021] Furthermore, the liquid outlet valve group includes a first valve seat, a first valve sleeve, and a first valve spring seat arranged in sequence. A first valve core and a first valve spring are arranged in the first valve sleeve. The first valve spring sits on the first valve spring seat. The first valve spring presses the first valve core against the first valve seat.

[0022] Specifically, the liquid inlet valve group includes a second valve seat, a second valve sleeve, and a second valve spring seat. A second valve core and a second valve spring are arranged in the second valve sleeve. The second valve spring sits on the second valve spring seat. The second valve spring presses the second valve core onto the second valve seat.

[0023] Specifically, the first valve core and the second valve core are both the new integrated valve cores dedicated to the reciprocating plunger pump described in one aspect.

[0024] Furthermore, the first valve spring contacts the support shoulder and the valve spring retaining ring in the first valve core;

[0025] Specifically, the second valve spring contacts the supporting shoulder and the valve spring retaining ring in the second valve core.

[0026] Furthermore, the valve spring seat is provided with a lateral circulation channel, and the lateral circulation channel connects the outer space of the valve spring with the central channel of the valve spring seat.

[0027] Furthermore, the outer wall of the first valve sleeve is provided with a first positioning ring, and the outer wall of the second valve sleeve is provided with a second positioning ring;

[0028] Specifically, the pump body is provided with a liquid outlet end cover and a liquid inlet end cover, the liquid outlet end cover is provided with a liquid outlet hole, the liquid inlet end cover is provided with a liquid inlet hole, and a positioning body is provided between the liquid outlet valve group and the liquid inlet valve group in the pump body;

[0029] Specifically, the positioning body is provided with a liquid passage hole facing the cylinder body, the positioning body is provided with a positioning hole opposite to the liquid passage hole, the pump body is provided with an insertion hole corresponding to the positioning hole, the outer wall of the pump body is connected to the positioning end cover, the positioning end cover is provided with a positioning rod, the positioning rod passes through the insertion hole and is inserted into the positioning hole;

[0030] Specifically, the first valve seat contacts the end surface of the positioning body facing the liquid outlet, the liquid outlet end cover is sleeved on the outer wall of the first valve sleeve, and the liquid outlet end cover presses and positions the first valve sleeve through the first positioning ring;

[0031] Specifically, the second valve sleeve is inserted into one end of the positioning body facing the liquid inlet, the second valve sleeve is positioned with the positioning body through a second positioning ring, the second valve seat is in contact with the liquid inlet end cover, and the liquid inlet end cover presses and positions the second valve seat; a liquid passage is left between the second valve sleeve, the second valve spring seat and the positioning body.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. This utility model adopts an integrated thinking and uses combination addition to improve the appearance and optimize the structure of the valve core and valve stem, which are originally separated. A reinforcing rod and a valve spring clamp are set at the connection between the two, and the valve core, valve stem and valve spring are combined into an integrated structure, which solves the problem that the valve spring of the existing device has no fixed point and is prone to displacement and uneven force.

[0034] 2. The utility model improves the valve core structure, overcomes the defect of the existing sphere without a fixed fulcrum, and improves the sphere structure to an elliptical structure, which fits more closely with the inside of the valve stem, and completely solves the production problem of the old structure's unstable operation that easily causes the valve body to fall out.

[0035] 3. The integrated valve core of the utility model realizes regular reciprocating operation during operation, and the valve spring is evenly stressed, which greatly reduces the metal fatigue of the valve spring, reduces the incidence of valve spring breakage, improves the volumetric efficiency of the injection pump, improves the working stability, and extends the maintenance-free period of the injection pump, reduces maintenance costs, and reduces the workload of employees. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a structural diagram of a new integrated valve core specially designed for a reciprocating plunger pump of the utility model;

[0037] Figure 2 This is a structural diagram of the reciprocating plunger pump of the utility model;

[0038] Figure 3 It is a structural schematic diagram of the liquid inlet valve group and the liquid outlet valve group in the utility model.

[0039] In the figure: 1. Plunger; 2. Pressure cap; 3. Pressure ring; 4. Sealing packing; 5. Cylinder; 6. Pump body; 7. Liquid outlet cover; 8. Positioning cover; 9. Liquid inlet cover.

[0040] 10. First valve core; 10.1. Valve core body; 10.2. Valve stem; 10.3. Valve spring retaining ring; 10.4. Reinforcement rod; 10.5. Tapered hole;

[0041] 11. Second valve core; 12. First valve spring seat; 13. First valve spring; 14. Second valve spring seat; 15. Positioning hole; 16. Second valve spring; 17. First valve sleeve; 18. First valve seat; 19. Positioning body; 20. Liquid hole; 21. Second valve seat. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] Example 1:

[0044] See also Figures 1 to 2 The utility model provides a new integrated valve core for a reciprocating plunger pump, comprising a valve core body 10.1 and a valve stem 10.2 connected as one piece. The valve core body 10.1 is an ellipsoid. A reinforcing rod 10.4 is arranged between the valve core body 10.1 and the valve stem 10.2. The outer diameter of the reinforcing rod 10.4 is the same as that of the valve core body 10.1, and the outer diameter of the reinforcing rod 10.4 is larger than the outer diameter of the valve stem 10.2, forming a supporting shoulder.

[0045] Among them, the valve core body 10.1 fits tightly with the inner wall of the pump chamber during installation to ensure sealing and stability. The ellipsoidal design of the valve core body 10.1 can better adapt to the shape of the inner wall of the pump chamber, reduce gaps, and improve work efficiency.

[0046] The reinforcing rod 10.4 has the same outer diameter as the valve core body 10.1, which can improve the strength of the valve core body 10.1, and the supporting shoulder is used to contact the end face of the valve spring.

[0047] Among them, a tapered hole 10.5 is provided at the bottom of the valve stem 10.2, which facilitates tool positioning during disassembly.

[0048] Furthermore, a valve spring snap ring 10.3 is provided between the reinforcing rod 10.4 and the valve stem 10.2. The outer diameter of the valve spring snap ring 10.3 is smaller than the outer diameter of the reinforcing rod 10.4, and the outer diameter of the valve spring snap ring 10.3 is larger than the outer diameter of the valve stem 10.2.

[0049] Among them, the valve spring clamping ring 10.3 is used to support the inner ring of the valve spring end. The provision of the valve spring clamping ring 10.3 facilitates the installation of the valve spring, makes the valve spring evenly stressed, greatly reduces the metal fatigue of the valve spring, reduces the incidence of valve spring breakage, improves the volumetric efficiency of the injection pump, extends the maintenance-free period of the injection pump, and reduces the workload of employees.

[0050] Preferably, the valve core body 10.1, the valve stem 10.2, the reinforcing rod 10.4 and the valve spring retaining ring 10.3 are made of high-strength and wear-resistant materials.

[0051] Preferably, the valve spring retaining ring 10.3 is interference-fitted with the valve spring to ensure that the valve spring will not shift or deform during operation.

[0052] Comparison of performance: Before the improvement, the valve core and valve stem were separate structures, which easily caused the valve spring to break due to uneven force. This led to frequent pump shutdowns for maintenance, impacting the efficiency and stability of the injection pump. Furthermore, valve core replacement required draining the polymer solution from the pump chamber, wasting raw materials and increasing wastewater treatment costs. The improved, integrated valve core, designed specifically for reciprocating plunger pumps, achieves regular reciprocating motion during operation, evenly applying force to the valve spring. This significantly reduces metal fatigue and the incidence of valve spring breakage, significantly improving the volumetric efficiency of the injection pump, extending the pump's maintenance-free period, and reducing employee workload.

[0053] In terms of safety, the integrated design of the new one-piece valve core for reciprocating piston pumps eliminates the need for separate valve core and valve stem structures, avoiding the safety hazards caused by slipping of traditional crowbars during removal and improving operational safety. Operators no longer need to use a crowbar to replace the valve core; a simple removal and insertion action is all that is required, significantly reducing operational risks. In terms of economic benefits, the design of the new one-piece valve core for reciprocating piston pumps not only improves the efficiency and stability of the injection pump but also significantly reduces maintenance frequency and costs. The integrated design of the valve core and valve stem reduces frequent valve spring breakage and replacement, lowering waste liquid disposal costs and improving production efficiency. It also reduces raw material waste, offering excellent economic benefits and application prospects.

[0054] Example 2

[0055] See also Figure 2 、 Figure 3 Based on Example 1, this embodiment provides a reciprocating plunger pump, including a barrel 5 and a pump body 6. The barrel 5 is connected to the side wall of the pump body 6 to form a T-shaped tube. A plunger 1 is provided in the barrel 5. The pump body 5 is provided with a liquid inlet and a liquid outlet. An inlet valve group is provided at one end of the pump body 5 near the liquid inlet, and an outlet valve group is provided at one end of the pump body 5 near the liquid outlet. The inlet valve group and the outlet valve group are both provided with the new integrated valve core dedicated to the reciprocating plunger pump described in Example 1.

[0056] Among them, a packing seat is provided on the inner wall of one end of the cylinder 5 away from the pump body 6, and a sealing packing 4 is provided in the packing seat. A pressure cap 2 is sleeved on the plunger 1, and a pressure ring 3 is provided between the pressure cap 2 and the sealing packing 4. The pressure cap 2 is threadedly connected to the end of the cylinder 5. By tightening the pressure cap 2, the sealing packing 4 is compressed to achieve the sealing of the plunger 1.

[0057] Among them, the liquid outlet valve group includes a first valve seat 18, a first valve sleeve 17, and a first valve spring seat 12 arranged in sequence. The first valve core 10 and the first valve spring 13 are arranged in the first valve sleeve 17. The first valve spring 13 sits on the first valve spring seat 12. The first valve spring 13 pushes the first valve core 10 onto the first valve seat 18.

[0058] Among them, the liquid inlet valve group includes a second valve seat 21, a second valve sleeve 22, and a second valve spring seat 14. The second valve core 11 and the second valve spring 16 are arranged in the second valve sleeve 22. The second valve spring 16 sits on the second valve spring seat 14. The second valve spring 16 pushes the second valve core 11 onto the second valve seat 14.

[0059] Among them, the valve seat, valve spring seat and valve sleeve are connected by threads. The valve seat and valve spring seat are force-bearing parts. The valve seat, valve spring seat and valve sleeve are separately arranged, which is convenient for direct replacement of the valve seat and valve spring seat after they are damaged, so that the valve sleeve can be used for a long time and the cost of replacing parts is reduced.

[0060] Specifically, the first valve core 10 and the second valve core 11 are both the new integrated valve cores specially used for the reciprocating plunger pump as described in Example 1, and the first valve spring 13 contacts the support shoulder and valve spring retaining ring 10.3 in the first valve core 10; the second valve spring 16 contacts the support shoulder and valve spring retaining ring 10.3 in the second valve core 11.

[0061] Specifically, the valve spring seat or the valve spring seat is provided with a lateral circulation channel, which connects the outer space of the valve spring with the central channel of the valve spring seat, preventing the valve spring from being compacted and sealed so that liquid cannot pass through.

[0062] Furthermore, the outer wall of the first valve sleeve 17 is provided with a first positioning ring, the outer wall of the second valve sleeve 22 is provided with a second positioning ring, the pump body 6 is provided with a liquid outlet end cover 7 and a liquid inlet end cover 9, the liquid outlet end cover 7 is provided with a liquid outlet hole, the liquid inlet end cover 9 is provided with a liquid inlet hole, a positioning body 19 is provided between the liquid outlet valve group and the liquid inlet valve group in the pump body 6, the positioning body 19 is provided with a liquid through hole 20 facing the cylinder 5, the positioning body 19 is provided with a positioning hole 15 opposite to the liquid through hole 20, the pump body 6 is provided with a jack corresponding to the positioning hole 15, the outer wall of the pump body 6 is connected to the positioning end cover 8, and the positioning end cover 8 is provided with a positioning rod. The positioning rod passes through the insertion hole and is inserted into the positioning hole 15 to realize the positioning of the positioning body 15; the first valve seat 18 contacts the end face of the positioning body 15 facing the liquid outlet, and the liquid outlet end cover 7 is sleeved on the outer wall of the first valve sleeve 17, and the liquid outlet end cover 7 presses and positions the first valve sleeve 17 through the first positioning ring; the second valve sleeve 22 is inserted into one end of the positioning body 15 facing the liquid inlet, and the second valve sleeve 22 is positioned with the positioning body 15 through the second positioning ring, and the second valve seat 21 contacts the liquid inlet end cover 9, fixing the liquid inlet end cover 9 to position the second valve seat 21; a liquid passage is left between the second valve sleeve 22, the second valve spring seat 14 and the positioning body 15.

[0063] Specifically, the cylinder 5, the liquid outlet end cover 7, the liquid inlet end cover 9, the positioning end cover 8 and the pump body 6 are all connected through flanges and bolts.

[0064] Specifically, sealing rings are provided between the cylinder 5, the liquid outlet end cover 7, the liquid inlet end cover 9, the positioning end cover 8, the first valve seat 18, the second valve seat 21 and the pump body 6 to prevent liquid leakage and pressure leakage.

[0065] Example 3:

[0066] Based on Example 2, this example provides a reciprocating plunger pump working process, valve core installation, and maintenance process:

[0067] Working process:

[0068] During the liquid inlet stage, when the plunger 1 moves backward from the front dead point, the pressure in the working chamber of the cylinder 5 decreases. When the pressure in the working chamber is lower than the liquid inlet pressure, the second valve core 11 of the liquid inlet valve seat opens, and the polymer mother liquid enters the working chamber of the cylinder 5; when the plunger 1 moves to the rear dead point, the second valve core 11 closes, and the liquid inlet stage ends.

[0069] During the discharge stage, when the plunger 1 moves forward from the rear dead point, the pressure in the working chamber of the cylinder 5 increases. When the pressure in the working chamber is applied to the first valve core 10 of the discharge valve group, the first valve core 10 opens and the polymer mother liquor is discharged from the working chamber; when the plunger 1 moves to the front dead point, the first valve core 10 hangs on the wall, and the discharge stage ends.

[0070] Valve core installation and maintenance process:

[0071] No special tools are required. During installation, one operator assembles the liquid outlet valve group and the liquid inlet valve group, pushes them into the pump body 6, positions them through the positioning body 19, and then installs the liquid outlet end cover 7 and the liquid inlet end cover 9 to achieve complete positioning.

[0072] When assembling the liquid outlet valve group and the liquid inlet valve group, ensure that the valve spring is clamped into the valve spring clamp ring 10.3. This installation process simplifies the operation steps and saves time and manpower.

[0073] When the valve core needs to be maintained, it is only necessary to remove the liquid outlet end cover 7 and the liquid inlet end cover 9 on the pump body 6, take out the old liquid outlet valve group and the liquid inlet valve group, unscrew the valve spring seat and valve seat, take out the valve core and valve spring, replace the scrapped parts according to the actual damage, clean and maintain them, reassemble them and put them back into the pump body 6; no additional tools and manpower are required, and only one person is needed to complete it. The whole process takes about 15 minutes, which greatly shortens the maintenance time.

[0074] Example 4:

[0075] On the basis of Example 1, this embodiment further improves the durability and corrosion resistance of the new integrated valve core dedicated to the reciprocating plunger pump.

[0076] The valve core body 10.1 and the valve stem 10.2 are made of composite materials, such as high-strength carbon fiber material and corrosion-resistant alloy steel material, which can not only increase the service life of the valve core, but also adapt to more demanding working environments.

[0077] Test verification: Through laboratory testing and actual application verification, the new integrated valve core for reciprocating piston pumps shows excellent performance in both high-pressure and low-pressure environments.

[0078] In the application of high-pressure liquid discharge valves, the new valve core can withstand a working pressure of up to 20MPa, and the valve spring remains intact after 1000 hours of continuous operation.

[0079] In the application of low-pressure liquid inlet valves, the new valve core can open and close smoothly at a working pressure as low as 0.1MPa, ensuring the stable injection of polymer mother liquor.

[0080] The adoption of a new integrated valve core specifically designed for reciprocating plunger pumps has increased the overall efficiency of the polymer injection pump by approximately 20%, reduced maintenance costs by approximately 30%, and cut the frequency of pump downtime for maintenance by more than half. This has resulted in more stable polymer solution injection and more uniform slug formation, improving the overall efficiency of chemical flooding projects.

[0081] The novel integrated valve core for reciprocating plunger pumps provided by this utility model, through its integrated design and structural improvements, significantly improves the operating efficiency and stability of reciprocating plunger pumps, reduces maintenance frequency and costs, and offers excellent economic benefits and application prospects. The multiple examples in the detailed implementation not only demonstrate the superior performance of the novel valve core but also, through detailed structural descriptions and experimental verification, further demonstrate its feasibility and practicality in practical applications.

[0082] All components not discussed in detail in this application and the connection methods of the components in this application are well-known technologies in the technical field and can be directly applied without further explanation.

[0083] In this utility model, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0084] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0085] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0086] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A new integrated valve core for reciprocating plunger pumps, including a valve core body and a valve stem, characterized in that: The valve core body and the valve stem are integrally connected, and the valve core body is an arc body; A reinforcing rod is provided between the valve core body and the valve stem. The outer diameter of the reinforcing rod is the same as that of the valve core body and is larger than that of the valve stem.

2. The new integrated valve core for reciprocating plunger pump according to claim 1 is characterized in that: The valve core body is an ellipsoid.

3. The new integrated valve core for reciprocating plunger pump according to claim 1, characterized in that: A valve spring clamping ring is provided between the reinforcing rod and the valve stem. The outer diameter of the valve spring clamping ring is smaller than the outer diameter of the reinforcing rod, and the outer diameter of the valve spring clamping ring is larger than the outer diameter of the valve stem.

4. The new integrated valve core for reciprocating plunger pump according to claim 3 is characterized in that: The valve spring clamping ring is interference fit with the inner ring of the valve spring end.

5. A reciprocating plunger pump, comprising a barrel and a pump body, wherein the barrel is connected to the side wall of the pump body, a plunger is arranged in the barrel, and the pump body is provided with a liquid inlet and a liquid outlet, characterized in that: A liquid inlet valve group is provided at one end of the pump body close to the liquid inlet, and a liquid outlet valve group is provided at one end of the pump body close to the liquid outlet; The liquid inlet valve group and the liquid outlet valve group are both provided with the new integrated valve core specially designed for the reciprocating plunger pump as claimed in claim 4.

6. A reciprocating piston pump according to claim 5, characterized in that: A packing seat is provided on the inner wall of one end of the cylinder away from the pump body, a sealing packing is provided in the packing seat, a pressure cap is sleeved on the plunger, a pressure ring is provided between the pressure cap and the sealing packing, and the pressure cap is connected to the end of the cylinder.

7. The reciprocating piston pump according to claim 5, characterized in that: The liquid outlet valve assembly includes a first valve seat, a first valve sleeve, and a first valve spring seat, which are arranged in sequence. A first valve core and a first valve spring are arranged in the first valve sleeve. The first valve spring sits on the first valve spring seat, and the first valve spring pushes the first valve core against the first valve seat. The liquid inlet valve group includes a second valve seat, a second valve sleeve, and a second valve spring seat. The second valve sleeve is provided with a second valve core and a second valve spring. The second valve spring sits on the second valve spring seat. The second valve spring presses the second valve core against the second valve seat. The first valve core and the second valve core are both the new integrated valve core dedicated to the reciprocating plunger pump as described in claim 4.

8. A reciprocating piston pump according to claim 7, characterized in that: The first valve spring is in contact with the support shoulder and the valve spring retaining ring in the first valve core; The second valve spring contacts the supporting shoulder and the valve spring retaining ring in the second valve core.

9. The reciprocating piston pump according to claim 7, characterized in that: The valve spring seat is provided with a lateral flow channel, which connects the outer space of the valve spring with the central channel of the valve spring seat.

10. The reciprocating piston pump according to claim 9, characterized in that: The outer wall of the first valve sleeve is provided with a first positioning ring, and the outer wall of the second valve sleeve is provided with a second positioning ring; The pump body is provided with a liquid outlet end cover and a liquid inlet end cover, the liquid outlet end cover is provided with a liquid outlet hole, the liquid inlet end cover is provided with a liquid inlet hole, and a positioning body is provided between the liquid outlet valve group and the liquid inlet valve group in the pump body; The positioning body is provided with a liquid passage hole facing the cylinder, the positioning body is provided with a positioning hole opposite to the liquid passage hole, the pump body is provided with an insertion hole corresponding to the positioning hole, the outer wall of the pump body is connected to the positioning end cover, the positioning end cover is provided with a positioning rod, the positioning rod passes through the insertion hole and is inserted into the positioning hole; The first valve seat contacts the end surface of the positioning body facing the liquid outlet, the liquid outlet end cover is sleeved on the outer wall of the first valve sleeve, and the liquid outlet end cover presses and positions the first valve sleeve through the first positioning ring; The second valve sleeve is inserted into one end of the positioning body facing the liquid inlet, the second valve sleeve is positioned with the positioning body through a second positioning ring, the second valve seat contacts the liquid inlet end cover, and the liquid inlet end cover presses and positions the second valve seat; a liquid passage is left between the second valve sleeve, the second valve spring seat and the positioning body.

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