Flow valve and seeder

Abstract

The utility model relates to a flow valve and a seeding machine, relates to the technical field of agricultural equipment, and aims to optimize the structure of the flow valve to a certain extent, so that the structure of the flow valve is simpler, and meanwhile, fixed throttling control is realized. The flow valve comprises a valve body, a valve element assembly, a reset assembly and a movable valve element. A containing cavity is formed in the valve body, the valve element assembly is located in the containing cavity and divides the containing cavity into a first cavity and a second cavity, the valve element assembly comprises a main valve element, and the main valve element can axially move relative to the valve body under the action of oil liquid. A sliding cavity is formed in one end of the main valve element, an oil passing opening enabling the sliding cavity to be communicated with the second cavity is formed in the main valve element, the main valve element is sleeved with the movable valve element, the movable valve element can enter or slide out of the sliding cavity, and when the movable valve element enters the sliding cavity, an annular gap is formed between the movable valve element and the inner wall of the main valve element; the other end of the reset assembly is connected with the end, away from the sliding cavity, of the main valve element.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural equipment, in particular, to a flow valve and a seeding machine. BACKGROUND

[0002] With the popularization of agricultural mechanization and the development of modern agricultural technology, the seeding machine as an important agricultural machinery equipment, its performance and reliability have a direct impact on agricultural production efficiency. The flow valve as a key control component in the seeding machine, is mainly used for adjusting the hydraulic flow in the seeding process, so as to realize the accurate control of the seeding speed and the seeding amount.

[0003] In the prior art, the flow valve usually adopts a multi-stage control structure, including valve body, valve core, spring and adjusting mechanism and other components. These components realize the flow adjustment function through a complex linkage mechanism. The specific working process is as follows: when the operator adjusts the flow valve, the valve core produces displacement under the action of hydraulic pressure, changes the cross-sectional area of the oil passage, and thus realizes the control of the hydraulic flow. At the same time, the spring mechanism provides a reset force to ensure that the valve core can return to the initial position.

[0004] Due to the particularity of the agricultural operation environment, the seeding machine often needs to work in harsh conditions with flying dust and frequent vibration. In the existing flow valve design, the matching precision between multiple moving parts is required to be high, and the control logic involves the coordinated work of multiple parameters. Such a complex structure is prone to problems such as component wear and matching failure when facing harsh working conditions, which increases the probability of failure. In addition, when overhauling and maintaining, the technician needs to understand the complex control logic and structural relationship in order to accurately judge the failure cause and carry out maintenance, which greatly increases the difficulty and time cost of maintenance. Practical new type content

[0005] The purpose of the embodiment of the present application is to provide a flow valve and a seeding machine, which optimizes the flow valve structure to a certain extent, makes the structure of the flow valve simpler, and at the same time realizes the fixed throttling control.

[0006] In order to achieve the above object, the utility model provides a flow valve, including valve body, valve core subassembly, reset subassembly and movable valve core, the valve body forms with containing chamber, the valve core subassembly is located in the containing chamber, the containing chamber is divided into first chamber and second chamber with the valve core subassembly, the valve core subassembly includes main valve core, the main valve core can be under the action of oil relative to the axial movement of the valve body, one end of the main valve core forms with sliding chamber, and the main valve core forms with the oil outlet that the sliding chamber is linked together with the second chamber, the movable valve core is set on the main valve core, and can enter or slide out the sliding chamber, and when the movable valve core enters the sliding chamber, the movable valve core and the inner wall of the main valve core form annular gap, one end of the reset subassembly is the positioning end, and the other end is connected with the one end of the main valve core away from the sliding chamber.

[0007] Wherein, the valve core subassembly still includes valve sleeve, the valve sleeve sets up in the valve body, and the relative position of the valve sleeve with the valve body is fixed, the valve sleeve forms with the positioning chamber, the main valve core slidingly sets up in the positioning chamber, the valve sleeve forms with the first communication port, and the first communication port and the oil outlet make the second chamber and the sliding chamber are linked together.

[0008] Specifically, the reset subassembly includes elastic member and positioning seat, the elastic member extends along the axial direction of the valve body, the positioning seat is set on the one end of the main valve core away from the sliding chamber, the positioning end of the elastic member is connected with the valve sleeve, and the other end is connected with the positioning seat, and the positioning seat forms with the second communication port that is linked together with the first chamber.

[0009] Further, the reset subassembly still includes limiting piece, the limiting piece is arranged on the one end of the main valve core away from the sliding chamber, and the positioning seat is abutted with the limiting piece.

[0010] Wherein, the valve body includes rod body part and cavity part, the cavity part is formed in one end of the rod body part, and the sliding chamber is formed in the cavity part, and the limiting portion is formed on the rod body part for limiting the sliding stroke of the movable valve core.

[0011] Specifically, the one end of the rod body part away from the sliding chamber forms with the first threaded part, the limiting piece is a nut, and the limiting piece is screwed with the rod body part.

[0012] Further, the valve body still includes the retaining ring, the valve sleeve forms with the bearing portion, the retaining ring is embedded in the bearing portion, and one end of the cavity part is abutted with the retaining ring.

[0013] The inner wall of the valve body is formed with a second threaded part extending along the axial direction of the valve body, and the outer wall of the valve sleeve is formed with a third threaded part.

[0014] Specifically, the two ends of the valve body are formed with oil inlet ports for pressure oil to enter the first chamber or the second chamber.

[0015] Compared with the prior art, the flow valve provided by the utility model has the following advantages:

[0016] The flow valve provided by the utility model comprises a valve body, a valve core assembly, a reset assembly and a movable valve core.

[0017] According to the analysis, the valve body provided by the utility model is formed with a containing cavity, thereby providing a bearing space for the valve core assembly and the reset assembly.

[0018] Meanwhile, the movable valve core is sleeved on the main valve core, and the main valve core is formed with a sliding cavity, so that the movable valve core can also enter the sliding cavity under the action of oil, and when the movable valve core enters the sliding cavity, an annular gap is formed between the movable valve core and the inner wall of the main valve core, so that oil can only pass through the annular gap, thereby realizing throttling control of the oil.

[0019] It can be understood that after the oil passes through the annular valve core, the oil can enter the second cavity through the oil passing port formed in the main valve core, thereby realizing the flow process of the oil.

[0020] Correspondingly, when the oil flows from the second chamber to the first chamber, the oil enters the sliding cavity through the oil passage to push the movable valve core out of the sliding cavity, and at the same time, the compressed reset assembly is reset due to the loss of the pressure oil on the main valve core, thereby driving the main valve core to reset, and the oil returns to the initial flow state.

[0021] Since the flow valve provided by the application realizes flow control of the flow valve only by the movement of the movable valve core, and realizes fixed throttling control, the structure and logic are more simple and direct, so that the overall seeding machine can better adapt to the harsh working environment in agriculture, and maintenance is more convenient and fast.

[0022] In addition, the utility model provides a seeding machine comprising the flow valve.

[0023] The seeding machine using the flow valve provided by the application can better adapt to the harsh environment in agricultural operation, and the maintenance of the flow valve is more simple, the service life and stability of the overall equipment are improved, and the maintenance efficiency is also improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments of the application, and it should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0025] Figure 1 The structure schematic view of the flow valve provided by the embodiments of the application in the initial state;

[0026] Figure 2 The state schematic view of the flow valve provided by the embodiments of the application when the pressure oil flows from the right side;

[0027] Figure 3 The state schematic view of the flow valve provided by the embodiments of the application when the pressure oil flows from the left side.

[0028] Figure: 1-valve body; 101-first chamber; 102-second chamber; 2-main valve core; 201-cavity part; 2011-sliding cavity; 2012-oil passage; 202-limiting part; 3-valve sleeve; 301-first communication port; 4-retaining ring; 5-movable valve core; 6-elastic member; 7-positioning seat; 701-second communication port; 8-limiting member. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0030] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "in", "out" and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships commonly placed when the products of the present application are used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] As shown in Figures 1-3 The flow valve provided by the present application comprises a valve body 1, a valve core assembly, a reset assembly and a movable valve core 5. The valve body 1 is formed with a containing cavity. The valve core assembly is located in the containing cavity, and divides the containing cavity into a first chamber 101 and a second chamber 102. The valve core assembly comprises a main valve core 2. The main valve core 2 can move axially relative to the valve body 1 under the action of oil. One end of the main valve core 2 is formed with a sliding cavity 2011. The main valve core 2 is formed with an oil passage 2012 for connecting the sliding cavity 2011 with the second chamber 102. The movable valve core 5 is sleeved on the main valve core 2 and can enter or slide out of the sliding cavity 2011. When the movable valve core 5 enters the sliding cavity 2011, the movable valve core 5 and the inner wall of the main valve core 2 form an annular gap. One end of the reset assembly is a positioning end, and the other end is connected with one end of the main valve core 2 away from the sliding cavity 2011.

[0033] Compared with the prior art, the flow valve provided by the present application has the following advantages:

[0034] The flow valve provided by this utility model has a receiving cavity in the valve body 1, which provides a bearing space for the valve core assembly and the reset assembly. The valve core assembly provided by this application can divide the receiving cavity into a first chamber 101 and a second chamber 102. The valve core assembly includes a main valve core 2, which can move axially relative to the valve body 1 under the action of oil. Therefore, when the pressurized oil flows from the first chamber 101 to the second chamber 102, it can push the main valve core 2 to move relative to the valve body 1 with the oil flow. It can be understood that since one end of the reset assembly in this application is a positioning end and the other end is connected to the end of the main valve core 2 away from the sliding cavity 2011, the movement of the main valve core 2 can compress the reset assembly, so that the reset assembly can obtain a rebound force.

[0035] Meanwhile, since the main valve core 2 is fitted with a movable valve core 5 and a sliding cavity 2011 is formed on the main valve core 2, the movable valve core 5 can also enter the sliding cavity 2011 under the action of the oil. When the movable valve core 5 enters the sliding cavity 2011, it can form an annular gap with the inner wall of the main valve core 2, so that the oil can only pass through the annular gap, thereby realizing the throttling control of the oil. Furthermore, since the dimensions of the movable valve core 5 and the main valve core 2 are fixed in this application, that is, the dimensions of the annular gap are fixed, fixed throttling control is achieved.

[0036] It is understandable that after the oil passes through the annular valve core, it can enter the second chamber 102 through the oil passage 2012 formed by the main valve core 2, thereby realizing the flow process of the oil.

[0037] Correspondingly, when the oil flows from the second chamber 102 to the first chamber 101, the oil enters the sliding chamber 2011 through the oil outlet 2012, pushing the movable valve core 5 out of the sliding chamber 2011. At the same time, since the main valve core 2 loses the effect of pressure oil, the compressed reset component is reset, which in turn drives the main valve core 2 to reset, and the oil returns to its initial flow state.

[0038] Since the flow valve provided in this application achieves flow control through the movement of the movable valve core 5 and realizes fixed throttling control, the structure and logic are simpler and more direct, making the overall seeder better adaptable to the harsh working environment in agriculture. At the same time, inspection and maintenance are more convenient and faster.

[0039] Optionally, such as Figures 1-3 As shown, the valve core assembly in this application also includes a valve sleeve 3; the valve sleeve 3 is disposed inside the valve body 1, and the relative position of the valve sleeve 3 and the valve body 1 is fixed. The valve sleeve 3 forms a positioning cavity, the main valve core 2 is slidably disposed in the positioning cavity, and the valve sleeve 3 forms a first communication port 301. The first communication port 301 and the oil passage port 2012 connect the second chamber 102 with the sliding chamber 2011.

[0040] The valve sleeve 3 can provide a mounting base for the main valve core 2, so that the main valve core 2 can slide along the axial direction of the valve body 1, thereby realizing the flow regulating function of the overall structure.

[0041] It can be understood that, since the main valve core 2 is arranged in the valve sleeve 3, in order to ensure the smooth flow of oil, the valve sleeve 3 in the present application is formed with a first communication port 301. In the initial state, i.e. when the reset assembly is not compressed, the oil passage 2012 and the first communication port 301 are relatively positioned, at this time, the oil flow is larger and the flow rate is relatively fast. When the oil flows from the first chamber 101 to the second chamber 102, the main valve core 2 and the movable valve core 5 can be driven to move at the same time, so that the oil passage 2012 and the first communication port 301 are misaligned to a certain extent, i.e. the alignment area of the oil passage 2012 and the first communication port 301 is reduced, so that the oil flow passing through is reduced. At the same time, since the movable valve core 5 and the main valve core 2 form an annular gap, under the joint action of the annular gap and the misaligned first communication port 301 and oil passage 2012, the fixed regulation of the flow is realized, and the throttling function is realized.

[0042] Preferably, the inner wall of the valve body 1 in the present application is formed with a second threaded portion, and the second threaded portion extends along the axial direction of the valve body 1. The outer wall of the valve sleeve 3 is formed with a third threaded portion, and the valve sleeve 3 is threadedly connected with the valve body 1.

[0043] In actual assembly, after the main valve core 2, the valve sleeve 3, the movable valve core 5, and the positioning seat 7 and the elastic member 6 described below are assembled, the third threaded portion of the valve sleeve 3 and the second threaded portion formed in the inner wall of the valve body 1 are used for assembly, so that the stable connection between the valve sleeve 3 and the valve body 1 can be realized through threaded cooperation.

[0044] At the same time, when the overall flow valve needs to be maintained, the valve sleeve 3 can be directly removed, so that the main valve core 2 and the movable valve core 5 and other structures can be taken out at the same time, thereby greatly improving the maintenance efficiency, and facilitating the inspection and maintenance of the maintenance personnel on each structural part.

[0045] Optionally, as shown in Figures 1-3 The reset assembly in the present application includes an elastic member 6 and a positioning seat 7. The elastic member 6 extends along the axial direction of the valve body 1. The positioning seat 7 is sleeved on the end of the main valve core 2 away from the sliding cavity 2011. The positioning end of the elastic member 6 is connected with the valve sleeve 3, and the other end is connected with the positioning seat 7. The positioning seat 7 is formed with a second communication port 701 connected with the first chamber 101.

[0046] The elastic member 6 in the application is a compression spring, which pushes the positioning seat 7 away from the valve sleeve 3 in the initial natural state. Since the positioning seat 7 is connected with the main valve core 2, the main valve core 2 can be kept in the initial position synchronously, i.e., the oil passage 2012 of the main valve core 2 is opposite to the first communication port 301 of the valve sleeve 3.

[0047] In order to ensure the smooth flow of oil, the positioning seat 7 in the application is formed with a second communication port 701, so that the oil can flow through the positioning seat 7.

[0048] Preferably, as shown in the drawings, Figures 1-3 The reset assembly in the application further includes a limiting member 8, which is arranged at one end of the main valve core 2 away from the sliding cavity 2011, and the positioning seat 7 abuts against the limiting member 8.

[0049] By arranging the limiting member 8 at one end of the main valve core 2 away from the sliding cavity 2011, the positioning seat 7 can be limited, so that the positioning seat 7 can be stably kept between the valve sleeve 3 and the limiting member 8 through the joint action of the elastic member 6 and the limiting member 8, avoiding the problem that the positioning seat 7 is separated from the main valve core 2.

[0050] Optionally, as shown in the drawings, Figures 1-3 The valve body 1 in the application includes a rod body part and a cavity part 201, the cavity part 201 is formed at one end of the rod body part, the sliding cavity 2011 is formed in the cavity part 201, and a limiting part 202 is formed on the rod body part for limiting the sliding stroke of the movable valve core 5.

[0051] By forming the limiting part 202 on the rod body part, the movable valve core 5 can be limited during the flow of oil from the second chamber 102 to the first chamber 101, avoiding the problem that the excessive displacement of the movable valve core 5 leads to a longer throttling process time in the next time, or even cannot trigger the throttling effect.

[0052] Preferably, a first threaded part is formed at one end of the rod body part away from the sliding cavity 2011, the limiting member 8 is a nut, and the limiting member 8 is threadedly connected with the rod body part.

[0053] By threadedly connecting the limiting member 8 with the rod body part of the main valve core 2, the elastic member 6 and the positioning seat 7 and other structures can be separated during maintenance and assembly, so that the replacement of individual structural members is more convenient, the service life of the overall structure is improved, and the use cost is reduced.

[0054] Optionally, as shown in the drawings, Figure 1 The valve body 1 in the application further includes a check ring 4, the valve sleeve 3 is formed with a bearing part, the check ring 4 is embedded in the bearing part, and one end of the cavity part 201 abuts against the check ring 4.

[0055] The bearing part formed by the valve sleeve 3 can provide a bearing space for the check ring 4, and the check ring 4 can limit the position of the main valve core 2, thereby avoiding excessive displacement of the main valve core 2.

[0056] It can be understood that the valve body 1 in the application is formed with an oil inlet at both ends, for pressure oil to enter the first chamber 101 or the second chamber 102.

[0057] In addition, the utility model provides a seeding machine comprising the flow valve.

[0058] The seeding machine provided by the application can better adapt to the harsh environment in agricultural operation, and the maintenance and repair of the flow valve are simpler, thereby improving the service life and stability of the overall equipment, and improving the maintenance and repair efficiency.

[0059] It should be noted that the features in the embodiments of the application can be combined with each other without conflict.

[0060] The above only describes the preferred embodiments of the application and is not intended to limit the application. Those skilled in the art can make various modifications and changes to the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A flow valve characterized by, The valve body, the valve core assembly, the reset assembly and the movable valve core are included. The valve body forms a containing cavity, the valve core assembly is located in the containing cavity, the containing cavity is divided into a first chamber and a second chamber, and the valve core assembly includes a main valve core which can move relative to the valve body in the axial direction under the action of oil. One end of the main valve core forms a sliding cavity, and the main valve core forms an oil passage which connects the sliding cavity with the second chamber, the movable valve core is sleeved on the main valve core and can enter or slide out of the sliding cavity, and when the movable valve core enters the sliding cavity, the movable valve core and the inner wall of the main valve core form an annular gap. One end of the reset assembly is a positioning end, and the other end is connected with one end of the main valve core which is away from the sliding cavity.

2. The flow valve of claim 1, wherein, The valve core assembly further includes a valve sleeve. The valve sleeve is arranged in the valve body, and the relative position of the valve sleeve and the valve body is fixed, the valve sleeve forms a positioning cavity, the main valve core is slidingly arranged in the positioning cavity, and the valve sleeve forms a first communication port, the first communication port and the oil passage connect the second chamber with the sliding cavity.

3. The flow valve of claim 2, wherein, The reset assembly includes an elastic member and a positioning seat. The elastic member extends in the axial direction of the valve body, the positioning seat is sleeved on one end of the main valve core which is away from the sliding cavity, one end of the elastic member is connected with the valve sleeve, and the other end is connected with the positioning seat. The positioning seat forms a second communication port which communicates with the first chamber.

4. The flow valve of claim 3, wherein, The reset assembly further includes a limiting member, the limiting member is arranged on one end of the main valve core which is away from the sliding cavity, and the positioning seat abuts against the limiting member.

5. The flow valve of claim 4, wherein, The valve body includes a rod body and a cavity body, the cavity body is formed at one end of the rod body, the sliding cavity is formed in the cavity body, and a limiting portion is formed on the rod body to limit the sliding stroke of the movable valve core.

6. The flow valve of claim 5, wherein, One end of the rod body which is away from the sliding cavity forms a first threaded portion, the limiting member is a nut, and the limiting member is threadedly connected with the rod body.

7. The flow valve of claim 5, wherein, The valve body further includes a check ring, the valve sleeve forms a bearing portion, the check ring is embedded in the bearing portion, and one end of the cavity body abuts against the check ring.

8. The flow valve of claim 2, wherein, The inner wall of the valve body forms a second threaded portion which extends in the axial direction of the valve body, the outer wall of the valve sleeve forms a third threaded portion, and the valve sleeve is threadedly connected with the valve body.

9. The flow valve of claim 2, wherein, Both ends of the valve body form oil inlets for pressure oil to enter the first chamber or the second chamber.

10. A planter characterized by, The flow valve includes the flow valve according to any one of claims 1-9.

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