CN209510351U - Two-stage unloading flow safety valve - Google Patents

Abstract

The utility model relates to the field of safety valves, specifically a two-stage unloading flow safety valve, comprising a joint, a valve shell and an outer shell arranged in sequence, the joint being connected to the outer shell through the valve shell, the outer shell being provided with a shell cavity; the valve shell being provided with a valve shell cavity, the shell cavity being provided with a first unloading mechanism, the valve shell cavity being provided with a second unloading mechanism, the joint being connected to the first unloading mechanism through the second unloading mechanism; the first unloading mechanism comprising a first valve sleeve, the outer side surface of the first valve sleeve being fitted with the inner wall of the outer shell cavity through a first sealing mechanism; the second unloading mechanism comprising a second valve core, the second valve core being fitted with the valve shell cavity through a second sealing mechanism. The utility model uses two-stage unloading, and at the same time arranges the first sealing mechanism and the second sealing mechanism in the middle of the components connected thereto, such an arrangement avoids the cutting of the sealing mechanism by the pores, and better guarantees the service life of the actual sealing mechanism.

Description

A two-stage unloading flow safety valve

technical field

The utility model relates to the field of safety valves, in particular to a two-stage unloading flow safety valve.

Background technique

In the environment where fully mechanized coal mining is becoming more and more automated and highly efficient, supports with large mining height and high impedance are becoming more and more popular, and the corresponding control valves have gradually developed from the previous small flow rate to the current medium flow rate ,Large Flow. In the coal machinery industry, the reversing valve is also called a control valve or a control valve. In the hydraulic system of the hydraulic support, the reversing valve controls the direction of the liquid flow to realize different actions such as lifting, pushing and pulling the hydraulic support.

Existing mine safety valves generally use a plunger-type spool, and the spool is evenly distributed around the circumference for liquid discharge. Because of the location of the openings on the spool, the spool is reciprocating, that is, when it is unloading. The opening on the spool needs to pass through the sealing ring during loading, so that the opening will cut the edge of the sealing ring. This structure of the spool component makes the service life of the safety valve extremely low. The liquid outlet hole makes the area of the sealing ring cut larger, and the life of the sealing ring is further reduced. In order to solve such technical problems, a new type of spool assembly structure is required now.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a new type of valve core assembly which can prevent the sealing ring from being cut.

In order to achieve the above object, the technical solution adopted by the utility model is:

A two-stage unloading flow safety valve, comprising a joint, a valve housing and an outer shell arranged in sequence, the joint is connected to the outer shell through the valve housing, a housing cavity is provided in the outer housing; a valve housing is provided in the valve housing A shell cavity, a first unloading mechanism is provided in the housing cavity, a second unloading mechanism is provided in the valve housing cavity, and the joint is connected with the first unloading mechanism through the second unloading mechanism; The first unloading mechanism includes a first valve sleeve, and the outer surface of the first valve sleeve is attached to the inner wall of the shell cavity through the first sealing mechanism; the second unloading mechanism includes a second valve core, and the second valve core It fits with the cavity of the valve casing through the second sealing mechanism.

The first valve sleeve is provided with a first placement groove, the first placement groove is provided with a first valve core, the first valve sleeve is provided with a first communication groove, and the outer shell is provided with a first The discharge hole, the first placement groove communicates with the first discharge hole through the first communication groove; the first valve sleeve is connected with a first return spring.

The valve casing is provided with a second discharge hole; the second discharge hole communicates with the cavity of the valve casing; the second unloading mechanism includes a second valve core, and the second valve core is connected with a The second return spring for the return of the second spool; the second return spring is connected to the inner wall of the cavity of the valve housing through the second spring seat; Gasket.

The inside of the second valve core is provided with a placement sinker for placing the second return spring.

The second valve core includes a second valve core body, on which a limiting protrusion is arranged.

The end of the second valve core body is provided with a discharge buffer ring groove.

The end of the second spool body close to the joint is provided with a shunt ring groove.

An escape ring groove is provided on the inner wall of the end of the first valve core body close to the second spring seat.

The valve casing includes a valve casing body, the valve casing body includes a reference sleeve, the end of the reference sleeve sleeve is provided with a connecting sleeve, the outer diameter of the connecting sleeve is the same as the inner diameter of the shell it contacts, and the shell The inner cavity is provided with a positioning ring groove for positioning the connecting sleeve; the end of the connecting sleeve away from the reference sleeve is provided with a positioning sleeve, the first valve sleeve is provided with a positioning sink groove, and the positioning sleeve It is compatible with the positioning sinker; the inner chamber of the valve housing communicates with the first placement groove through a communication channel.

A protective cover is provided on the outside of the valve housing, and a discharge ring groove is provided on the protection cover, and the discharge ring groove communicates with the second discharge hole.

The utility model has the advantages of:

The utility model uses two-stage unloading, and at the same time, the first sealing mechanism and the second sealing mechanism are arranged in the middle of the parts connected to it. This setting avoids the cutting of the sealing mechanism by the hole, and better ensures the use of the actual sealing mechanism. life.

Description of drawings

The following is a brief description of the contents expressed in the accompanying drawings of the utility model specification and the marks in the figures:

Fig. 1 is the structural representation of the utility model.

The sections in the above figure are labeled:

1. Joint, 2. Limit protrusion, 3. Protective cover, 4. Valve housing, 5. Shell, 6. First return spring, 8. Seal washer, 9. Second return spring, 10. Second spool .

Detailed ways

The specific implementation of the present utility model will be described in further detail below through the description of the best embodiment with reference to the accompanying drawings.

A two-stage unloading flow safety valve, including a joint 1, a valve housing 4 and an outer shell 5 arranged in sequence, the joint 1 is connected to the outer shell 5 through the valve housing 4, and the outer shell 5 is provided with a housing cavity; the The valve casing 4 is provided with a valve casing 4 cavity, the casing cavity is provided with a first unloading mechanism, and the valve casing 4 cavity is provided with a second unloading mechanism, and the joint 1 is unloaded through the second unloading mechanism. The mechanism is connected with the first unloading mechanism; the first unloading mechanism includes a first valve sleeve 14, and the outer surface of the first valve sleeve 14 is attached to the inner wall of the cavity of the shell 5 through the first sealing mechanism; the second The unloading mechanism includes a second spool, and the second spool fits with the cavity of the valve housing 4 through the second sealing mechanism; the utility model changes the structure of the traditional safety valve, which generally adopts a plunger-type spool , the valve core is evenly distributed with liquid outlet holes. When unloading, the liquid outlet holes of the valve core need to pass through the sealing ring, and the sealing ring is cut at the same time when passing through the hole. If it is used for a long time, because the liquid outlet hole cuts the sealing ring, a suitable safety valve The service life is greatly reduced. At the same time, some large-flow safety valves increase the size of the valve core and the liquid outlet hole for faster unloading, which makes the cutting area of the through hole larger and the life of the sealing ring is further reduced; The utility model changes the structure of the safety valve. The utility model uses two-stage unloading. At the same time, the first sealing mechanism and the second sealing mechanism are arranged in the middle of the parts connected with it. The service life of the actual sealing mechanism is well guaranteed, and the service life of the safety valve is extended to a certain extent. At the same time, in the utility model, the first sealing mechanism and the second sealing mechanism use the traditional sealing ring structure, which belongs to the known technology, the present application adopts the original structure, but changes the position of the traditional structure, and then realizes the purpose of the present application; meanwhile, the connection between the joint 1, the valve casing 4 and the casing 5 of the present application can also adopt the traditional threaded connection Specifically, it can be set as required.

As preferably, the first valve sleeve 14 in the utility model is provided with a first placement groove, the first placement groove is provided with a first valve core 13, and the first valve sleeve 14 is provided with a first A communication groove, the housing 5 is provided with a first discharge hole, and the first placement groove communicates with the first discharge hole through the first communication groove; the first valve sleeve 14 is connected with a first return spring 6 ; The valve casing 4 is provided with a second discharge hole; the second discharge hole communicates with the cavity of the valve casing 4; the second unloading mechanism includes a second valve core, and the second valve core is connected to There is a second return spring 9 for controlling the return of the second spool; the second return spring 9 is connected to the inner wall of the cavity of the valve housing 4 through the second spring seat 11; the end of the joint 1 is provided with the second The valve core is matched with the sealing gasket 8 for sealing; through such a structural design, the safety valve disclosed in the utility model can be realized to have a two-stage sealing structure. The valve sleeve in the utility model is the basic component of the first unloading mechanism, which Adjacent to each component to provide the installation reference, the valve sleeve in the utility model is provided with a first placement groove, the first placement groove is set through the valve sleeve, the first placement groove is provided with a first valve core 13, and the first valve core 13 is used for To control the communication of the first unloading hole, the valve sleeve is provided with a first communication groove to ensure that the subsequent liquid can flow into the first discharge hole from the valve sleeve. At the same time, the utility model is also provided with a second unloading mechanism. The second unloading mechanism includes The second spool, the second spool is used to control the on-off of the second discharge hole. In the utility model, the joint 1 is provided with a joint 1 channel for liquid inlet, and the second spool is provided with a channel for liquid to pass through. The through hole of the spool, the utility model can realize the separate unloading of large flow and small flow through the setting of the above structure, so that the safety valve can be used in a wider range. In actual use, the volume of the safety valve can be reduced to a certain extent through the secondary unloading, which is convenient for subsequent use.

As preferably, the inside of the second valve core in the utility model is provided with a placement sinker 101 for placing the second return spring 9; the placement sinker 101 can be used to place the second return spring 9 to facilitate the second reset During the positioning operation of the spring 9, the placing sinker 101 communicates with the outside of the second valve core, and the placing sinker 101 is set toward the side of the first valve sleeve 14, so as to ensure the cooperation between subsequent parts and facilitate assembly.

As a preference, the second spool in the present invention includes a second spool body 10, on the second spool body 10 is provided with a limiting protrusion 2; , to avoid the transitional pressure test of the second return spring 9 when the flow rate is large, that is, through such a structural design, the service life of the second return spring 9 is increased; based on such settings, the valve housing 4 in the utility model Including the valve casing 4 body, the valve casing 4 body includes a reference sleeve 44, the end of the reference sleeve sleeve is provided with a connecting sleeve 42, and the outer diameter of the connecting sleeve 42 is the same as the inner diameter of the shell 5 that it contacts, so The inner cavity of the casing 5 is provided with a positioning ring groove for positioning the connecting sleeve 42; the end of the connecting sleeve 42 away from the reference sleeve 44 is provided with a positioning sleeve 41, and the first valve sleeve 14 is provided with a positioning ring groove. The sinking groove 18, the positioning sleeve 41 is compatible with the positioning sinking groove 18; the inner cavity of the valve housing is connected with the first placement groove through the communication channel 12; at the same time, the outer diameter of the reference sleeve 44 in the utility model is large and connected The outer diameter of the sleeve 42, and for the convenience of expression, the reference sleeve 44 of the present invention is connected with the connecting sleeve 42 through the transition sleeve 43, the outer diameter of the transition sleeve 43 is the same as the outer diameter of the reference sleeve 44, and the transition sleeve 43 The inner diameter is the same as the inner diameter of the connecting sleeve 42, such a setting makes the inside of the transition sleeve 43 form a boss structure, which can easily cooperate with the position-limiting protrusion 2, and then make the position-limiting protrusion 2 play a position-limiting role; At the same time, as a greater optimization, the positioning sinker 18 on the valve sleeve of the utility model is connected with the positioning sleeve 41, and the two can be connected by bolts, buckles, or by interference fit. The connection between the two can be set according to the specific needs. Such setting makes the connection between the valve casing 4 and the valve sleeve more convenient, makes the first unloading mechanism and the second unloading mechanism more integrated, and reduces the shaking between subsequent components. , to increase the effect of later use.

As preferably, the end of the second valve core body 10 in the utility model is provided with a discharge buffer ring groove 16; the discharge buffer ring groove 16 is arranged on the outside of the end of the second valve core body 10, the purpose of such setting In order to better ensure the smoothness of the discharge and avoid the excessive impact force of the liquid during the discharge, which will increase the noise during the discharge, the utility model is provided with a discharge buffer ring groove 16, which has a certain liquid storage function. This can better ensure the smoothness of the flow and reduce the noise during unloading.

As a preference, the second spool body 10 in the present utility model is provided with a shunt ring groove 17 near the end of the joint 1. Such a setting is actually to make the outer surface of the end of the second spool body 10 into a conical surface. , so that the liquid can be quickly transferred when the large flow is unloaded, reducing the interference with the second valve core body 10 when the liquid flows.

As preferably, in the utility model, the inner wall of the first valve core 13 body near one end of the second spring seat 11 is provided with an escape ring groove, and the setting of the avoidance ring groove is convenient to be connected with the second spring seat 11 to avoid the second spring seat 11. The sinking groove 101 of the spool body 10 has a small opening and thus interferes with the movement of the second spring seat 11 . At the same time, the second spring seat 11 and the avoidance ring groove also have a position-limiting function and a good guiding effect.

As preferably, the outer side of the valve casing 4 in the utility model is provided with a protective cover 3, and the protective cover 3 is provided with a discharge ring groove, and the discharge ring groove is connected with the second discharge hole; the protective cover 3 is mainly It plays a protective role. At the same time, the setting of the protective cover 3 restricts the flow direction of the liquid discharged from the second discharge hole, avoids the transitional injection of the liquid, and plays the role of planning the path.

Working principle of the utility model:

The safety valve disclosed in the utility model includes a joint 1, a valve housing 4, a valve sleeve, and a housing 5. The joint 1 is connected to the valve housing 4, the valve sleeve is inside the housing 5, and the valve housing 4 is connected to the housing 5. In addition to the above Parts, in the utility model, the end of the shell 5 away from the valve housing 4 is provided with a pressure regulating bolt 7; through the position of the pressure regulating bolt 7 in the shell 5, the compression amount of the first return spring 6 can be changed, and then the pressure can be adjusted. In the utility model, one end of the first return spring 6 is connected with the pressure regulating bolt 7, and the other end is connected with the first spring seat 15, and the first spring seat 15 is connected with the valve sleeve. At the same time, in order to avoid interference, In the utility model, the second spring seat 11 is also provided with a transition connection hole to avoid the existence of the second spring seat 11 and affect the flow of the liquid; and in the utility model, the second valve core and the joint 1 adopt the existing line sealing structure , the sealing between the second valve core and the joint 1 is realized through the contact between the end of the second valve core and the sealing gasket 8 .

The flow unloading process in the utility model is as follows:

When the small flow rate is unloaded, the liquid enters the interior of the joint 1 through the channel of the joint 1, and the liquid inside the joint 1 enters the sinking tank through the through hole of the valve core, and then enters the communication channel 12 on the valve housing 4 from the sinking tank 101, when the liquid Continuously increasing, the liquid pushes open the first valve core 13, and the liquid enters the first discharge hole through the first communication groove, thereby realizing the unloading operation of small flow;

When the large flow is unloaded, the liquid can push the second valve core to move due to the large impact of the liquid, and the second valve core moves toward the end away from the joint 1, so that the second valve core is separated from the sealing gasket 8, and the liquid can be released by the second valve core. The liquid flows out from the gap formed between the valve core and the sealing gasket 8, and then flows out from the second discharge hole, and when the liquid flows out from the gap formed between the second valve core and the sealing gasket 8, the above-mentioned small flow unloading also Re-synchronization, so that the unloading operation of large traffic can be realized.

Apparently, the specific implementation of the utility model is not limited by the above methods, as long as various insubstantial improvements are made by adopting the method concepts and technical solutions of the utility model, they all fall within the protection scope of the utility model.

Claims (10)

1. A two-stage unloading flow safety valve, characterized in that it includes a joint, a valve housing and an outer shell arranged in sequence, the joint is connected with the outer shell through the valve housing, and a housing cavity is provided in the outer shell; A valve housing cavity is provided in the valve housing, a first unloading mechanism is provided in the housing cavity, a second unloading mechanism is provided in the valve housing cavity, and the joint connects with the first unloading mechanism through the second unloading mechanism. The mechanism is connected; the first unloading mechanism includes a first valve sleeve, and the outer surface of the first valve sleeve is attached to the inner wall of the shell cavity through the first sealing mechanism; the second unloading mechanism includes a second valve core, The second valve core is attached to the cavity of the valve housing through the second sealing mechanism. 2. A two-stage unloading flow safety valve according to claim 1, characterized in that, the first valve sleeve is provided with a first placement groove, and the first placement groove is provided with a first valve core, The first valve sleeve is provided with a first communication groove, and the outer casing is provided with a first discharge hole, and the first placement groove communicates with the first discharge hole through the first communication groove; the first The valve sleeve is connected with a first return spring. 3. A two-stage unloading flow safety valve according to claim 2, characterized in that, the valve casing is provided with a second discharge hole; the second discharge hole communicates with the cavity of the valve casing; The second unloading mechanism includes a second spool, and the second spool is connected with a second return spring for controlling the return of the second spool; The inner walls are connected; the end of the joint is provided with a sealing washer that cooperates with the second valve core for sealing. 4 . The two-stage unloading flow safety valve according to claim 3 , wherein a sinking groove for placing the second return spring is arranged inside the second valve core. 4 . 5 . The two-stage unloading flow safety valve according to claim 3 , wherein the second valve core includes a second valve core body, and a limiting protrusion is arranged on the second valve core body. 6 . 6 . The two-stage unloading flow safety valve according to claim 3 , wherein a discharge buffer ring groove is provided at the end of the second valve core body. 6 . 7 . The two-stage unloading flow safety valve according to claim 3 , wherein a shunt ring groove is provided at the end of the second valve core body near the joint. 7 . 8 . The two-stage unloading flow safety valve according to claim 3 , wherein an escape ring groove is provided on the inner wall of the end of the first valve core body close to the second spring seat. 9. A two-stage unloading flow safety valve according to claim 3, wherein the valve casing includes a valve casing body, the valve casing body includes a reference sleeve, and the end of the reference sleeve sleeve is provided with There is a connecting sleeve, the outer diameter of the connecting sleeve is the same as the inner diameter of the shell it contacts, and the inner cavity of the shell is provided with a positioning ring groove for positioning the connecting sleeve; the end of the connecting sleeve away from the reference sleeve is provided with The positioning sleeve is provided with a positioning sinker on the first valve sleeve, and the positioning sleeve is adapted to the positioning sinker; the inner cavity of the valve housing is connected with the first placement groove through a communication channel. 10. A two-stage unloading flow safety valve according to claim 3, characterized in that a protective cover is provided on the outside of the valve housing, and a discharge ring groove is provided on the protection cover, and the discharge ring groove is connected with the first discharge ring groove. The two discharge holes are connected.