One-way valve for plunger pump

Abstract

The utility model discloses a one-way valve for a plunger pump, and relates to the technical field of one-way valves, the one-way valve for the plunger pump comprises a valve body, the inside of one end of the valve body is in threaded connection with an adjusting ring, and a pull rod is arranged inside the adjusting ring; the end, away from the adjusting ring, of the pull rod is connected with a valve element. The adjusting ring is arranged in a T shape, the protruding end of the adjusting ring is sleeved with a spring, and the spring is further sleeved with the outer side of the pull rod. The other end of the pull rod is in threaded connection with the valve core; a through hole is formed in the valve core; and one side of the valve body is in threaded connection with an oil outlet nozzle. According to the utility model, when the pre-tightening force of the spring needs to be increased, only the force application part needs to be rotated, the adjusting ring rotates along with the force application part, and the protruding part of the adjusting ring extrudes the spring to increase the compression amount of the spring, so that the opening pressure of the valve core is improved, the valve core can still work stably in a high-pressure environment, leakage is effectively prevented, and the reliability and durability of a system are further enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of one-way valve, and concretely relates to a one-way valve for plunger pump. BACKGROUND

[0002] The high-pressure plunger pump belongs to a volumetric pump, and the purpose of conveying liquid is achieved by means of periodic change of volume in a working chamber. The working chamber of the reciprocating pump is separated from the outside by means of a sealing device, and is communicated or closed with a pipeline through inlet and outlet one-way valves.

[0003] A high-pressure plunger pump inlet and outlet one-way valve is disclosed in Chinese Patent Publication No. CN 211738128 U, which comprises a valve body, a flow guide sleeve, a valve core and a spring part. The valve body is fixedly installed at the front end of the flow guide sleeve, the valve core is installed in the flow guide sleeve through the spring part, and the valve core can move axially in the flow guide sleeve. The flow of the flow passage formed by the flow guide sleeve and the valve body is changed by changing the position of the valve core.

[0004] The one-way valve in the above-mentioned patent provides a spring to provide a spring force to the valve core. The valve core can be opened only when the liquid pushes the valve core and overcomes the spring force. However, the opening pressure of the one-way valve cannot be adjusted because the pressure of the oil pumped out by the plunger pump is different. The spring force cannot be adjusted when the spring is elastically fatigued. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a one-way valve for plunger pump, which can adjust the opening pressure of the one-way valve according to the actual situation when used in plunger pumps with different pressures. The spring force can be adjusted when the spring is elastically fatigued, so as to solve the technical problems proposed in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A one-way valve for plunger pump comprises a valve body, an adjusting ring is connected to the inside of one end of the valve body, and a pull rod is arranged in the adjusting ring. One end of the pull rod away from the adjusting ring is connected with a valve core.

[0008] The adjusting ring is arranged in a T shape, and a spring is arranged outside the protruding end of the adjusting ring. The spring is also arranged outside the pull rod. The other end of the pull rod is threadedly connected with the valve core. The valve core has a through hole inside.

[0009] One side of the valve body is threadedly connected with an oil outlet nozzle.

[0010] According to a further technical scheme of the utility model, one end of the valve body is buckled with a protective cover, and the other end is an oil inlet nozzle. The oil inlet nozzle is externally provided with external threads.

[0011] As a further technical scheme of the utility model, the valve core is internally hollow, and a conical body is arranged in the cavity.

[0012] As a further technical scheme of the utility model, the valve core is internally hollow, and a conical body is arranged in the cavity.

[0013] As a further technical scheme of the utility model, the two ends of the pull rod are provided with external threads, and a fixing disc is further arranged at one end of the pull rod connected with the valve core; the other end of the pull rod extends to the outside of the adjusting ring and is further provided with a nut.

[0014] As a further technical scheme of the utility model, the adjusting ring is further integrally provided with a force applying part on the outside.

[0015] As a further technical scheme of the utility model, the protruding end of the adjusting ring is further rotationally connected in the stabilizing part; and the stabilizing part is sleeved in the groove in the valve body.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] 1. In use, first, the external threads on the outside of the oil inlet nozzle are connected with the plunger pump, and when the oil pumped out by the plunger pump enters the valve body, the valve core is pushed to slide inwards to align the through hole with the oil outlet nozzle after overcoming the elastic force of the spring; and the oil pumped out by the plunger pump flows out through the oil outlet nozzle.

[0018] 2. When the pre-tightening force of the spring needs to be increased, the force applying part is rotated, the adjusting ring is rotated, the protruding part of the adjusting ring presses the spring, the compression amount of the spring is increased, the opening pressure of the valve core is increased, the valve core can still work stably under high pressure, leakage is effectively prevented, and the reliability and durability of the system are further enhanced.

[0019] 3. When the spring appears elastic fatigue and the pressure cannot reach the predetermined pressure, the adjusting ring is adjusted in the same way, the pre-tightening force of the spring is gradually restored, and the opening pressure of the valve core is restored to normal. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a perspective structural schematic view of the utility model.

[0021] Figure 2 is a front view of the utility model. Figure 1

[0022] Figure 3 is an A-A sectional view of the utility model. Figure 2

[0023] ​​Figure 4 is the internal structure schematic view of the utility model Figure 1 .

[0024] Figure 5 is the partial structure schematic view of the utility model Figure 1 .

[0025] Figure 6 is the internal structure schematic view of the utility model Figure 5 .

[0026] In the figure: 1 - valve body, 2 - adjusting ring, 3 - stabilizing piece, 4 - pull rod, 5 - spring, 6 - valve core, 7 - slider, 8 - through hole, 9 - oil outlet nozzle, 10 - protective cover, 11 - force applying part. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0028] Please refer to Figures 1-6 , in the embodiments of the utility model, a one-way valve for plunger pump, including valve body 1, the inside screw thread connection has adjusting ring 2 in the one end of this valve body 1, and adjusting ring 2 inside is equipped with pull rod 4;The pull rod 4 is connected with valve core 6 at the one end away from adjusting ring 2;

[0029] Adjusting ring 2 is T-shaped and the one end of adjusting ring 2 protruding is externally sleeved with spring 5, and the spring 5 is also sleeved on the outside of pull rod 4;And the other end of pull rod 4 is screw connected with valve core 6;The valve core 6 has a through hole 8 in the inside;

[0030] The valve body 1 is screw connected with oil outlet nozzle 9 on one side.

[0031] Specifically, the one end of the valve body 1 is buckled with protective cover 10, and the other end is oil inlet nozzle, and the oil inlet nozzle is externally provided with external thread.

[0032] By adopting the above technical scheme, when using, first, the external thread outside the oil inlet nozzle is connected with the plunger pump, when the oil pumped by the plunger pump enters the inside of the valve body 1, after overcoming the elastic force of the spring 5, the valve core 6 is pushed to slide inwards, so that the through hole 8 is aligned with the oil outlet nozzle 9;The oil pumped by the plunger pump will flow out through the oil outlet nozzle 9.

[0033] In the embodiment, the valve core 6 is externally provided with two sliding blocks 7; the sliding block 7 is in sliding connection with the sliding groove opened in the inner wall of the valve body 1.

[0034] Through the setting of the sliding block 7 and the sliding groove, it can be ensured that the valve core 6 does not rotate when sliding, and the through hole 8 can be accurately aligned with the oil outlet nozzle 9; at the same time, the design of the sliding block 7 also reduces the friction between the valve core 6 and the valve body 1, prolongs the service life. When the oil flow stops, the spring 5 quickly resets to ensure that the valve core 6 is closed to prevent backflow of oil, thereby improving the stability and safety of the system.

[0035] In the embodiment, the valve core 6 is internally hollow, and a conical body is arranged in the cavity.

[0036] Through the above technical scheme, the conical body can effectively guide the flow of oil, reduce the vortex and pressure loss, and further improve the oil pumping efficiency; at the same time, the hollow design reduces the weight of the valve core, reduces the moment of inertia, makes the valve core respond more quickly, and ensures the stability and reliability of oil delivery.

[0037] In the embodiment, the pull rod 4 is externally provided with external threads at both ends, and a fixing disc is further arranged at one end connected with the valve core 6; the other end of the pull rod 4 extends to the outside of the adjusting ring 2 and is cooperatively provided with a nut.

[0038] Through the above technical scheme, the fixing disc is used for positioning the spring 5, and when the valve core 6 slides, the fixing disc ensures that the spring 5 is stably compressed, and the nut is used for adjusting the limiting position of the pull rod 4 in the normal state, thereby ensuring the stability of the adjusting pull rod 4 and the spring 5 in the valve body 1.

[0039] In the embodiment, the adjusting ring 2 is further integrally provided with a force applying part 11 on the outer side.

[0040] Through the above technical scheme, when it is necessary to increase the pre-tightening force of the spring 5, the force applying part 11 is only rotated, the adjusting ring 2 is rotated, the protruding part of the adjusting ring 2 extrudes the spring 5, the compression amount of the spring 5 is increased, thereby increasing the opening pressure of the valve core 6, ensuring that the valve core 6 can still work stably under high pressure environment, effectively preventing leakage, and further enhancing the reliability and durability of the system.

[0041] When the spring 5 appears elastic fatigue and the pressure cannot reach the predetermined pressure, the adjusting ring 2 is adjusted in the same way, and the pre-tightening force of the spring 5 is gradually restored, thereby ensuring that the opening pressure of the valve core 6 returns to normal.

[0042] In the embodiment, the protruding end of the adjusting ring 2 is further rotationally connected in the stabilizing part 3; and the stabilizing part 3 is sleeved in the groove in the valve body 1.

[0043] The valve body 1 is provided, so that the adjusting ring 2 can be kept stable during rotation, the adjusting deviation caused by vibration is avoided, the opening pressure of the valve core 6 is accurately controllable, and the operation accuracy of the system and the stability during long-term operation are further improved.

[0044] The working principle of the utility model is: when using, first, the external thread outside the oil inlet nozzle is connected with the plunger pump, when the oil pumped by the plunger pump enters the inside of the valve body 1, after overcoming the elastic force of the spring 5, the valve core 6 is pushed to slide inwards, so that the through hole 8 is aligned with the oil outlet nozzle 9; the oil pumped by the plunger pump flows out through the oil outlet nozzle 9;

[0045] When the pre-tightening force of the spring 5 needs to be increased, the force applying part 11 is only rotated, the adjusting ring 2 is rotated, the protruding part of the adjusting ring 2 extrudes the spring 5, the compression amount of the spring 5 is increased, so that the opening pressure of the valve core 6 is increased, the stable work under high pressure environment is ensured, the leakage is effectively prevented, and the reliability and durability of the system are further enhanced.

[0046] When the spring 5 appears elastic fatigue, and the pressure cannot reach the predetermined pressure, the adjusting ring 2 is adjusted in the same way, the pre-tightening force of the spring 5 is gradually recovered, and the opening pressure of the valve core 6 is recovered to normal.

[0047] It is apparent for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, the scope of the utility model is defined by the appended claims instead of the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any figure mark in the claims should not be regarded as limiting the involved claims.

[0048] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and the person skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that can be understood by the person skilled in the art.

Claims

1. A check valve for a plunger pump, characterized in that: The valve includes a valve body (1), one end of which is internally threaded with an adjusting ring (2), and the adjusting ring (2) is internally provided with a pull rod (4); the end of the pull rod (4) away from the adjusting ring (2) is connected to a valve core (6); The adjusting ring (2) is T-shaped, and a spring (5) is sleeved on the outside of the protruding end of the adjusting ring (2). The spring (5) is also sleeved on the outside of the pull rod (4). The other end of the pull rod (4) is threaded to the valve core (6). The valve core (6) has a through hole (8) inside. The valve body (1) is threadedly connected to an oil outlet (9) on one side.

2. The one-way valve for a plunger pump according to claim 1, characterized in that: One end of the valve body (1) is fastened with a protective cover (10), and the other end is an oil inlet, which has external threads.

3. The one-way valve for a plunger pump according to claim 1, characterized in that: The valve core (6) is provided with two sliders (7) on its outside; the sliders (7) are slidably connected to the grooves opened on the inner wall of the valve body (1).

4. The one-way valve for a plunger pump according to claim 1, characterized in that: The valve core (6) is hollow inside, and a cone-shaped body is provided inside the cavity.

5. The one-way valve for a plunger pump according to claim 1, characterized in that: Both ends of the pull rod (4) are provided with external threads, and a fixing plate is provided at one end connected to the valve core (6); the other end of the pull rod (4) extends to the outside of the adjusting ring (2) and is fitted with a nut.

6. The one-way valve for a plunger pump according to claim 1, characterized in that: The outer side of the adjustment ring (2) is also integrally provided with a force-applying part (11).

7. The one-way valve for a plunger pump according to claim 1, characterized in that: The protruding end of the adjustment ring (2) is also rotatably connected to the stabilizer (3); the stabilizer (3) is fitted into the groove inside the valve body (1).

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