CN209925646U

CN209925646U - Cylinder type control valve

Info

Publication number: CN209925646U
Application number: CN201920600382.XU
Authority: CN
Inventors: 余洪斌; 王汉克; 李家慧; 陈阿云; 周瑜钦; 谢锦礼
Original assignee: ZHEJIANG PARI WORLD AUTOMATION METER CO Ltd
Current assignee: ZHEJIANG PARI WORLD AUTOMATION METER CO Ltd
Priority date: 2019-04-28
Filing date: 2019-04-28
Publication date: 2020-01-10
Anticipated expiration: 2029-04-28

Abstract

The utility model discloses a cylinder type control valve, include the valve body and set up the disk seat in the valve body, the valve body is located and is equipped with the valve gap directly over the disk seat, be located the disk seat and be equipped with down the valve gap under, between valve body and the last valve gap, all through bolted connection between valve body and the lower valve gap, install the valve rod on the last valve gap, be equipped with the case that is located between disk seat and the lower valve gap on the valve rod, the valve rod is located the case top and has set firmly spacing fender ring, the axial displacement of valve rod just can be followed to the valve rod is located to the case cover, be equipped with between case and the spacing fender ring and press by both and hold and cooperate the sealed sealing washer of disk seat, the case surface is equipped with and wears to establish the locating pin that the valve rod is used for the locating case to press to hold. The utility model has the advantages of it is following and effect: the utility model discloses on the basis of guaranteeing the original sealing performance of valve, can realize the convenient change to the sealing washer.

Description

Cylinder type control valve

Technical Field

The utility model relates to a valve, in particular to cylinder type control valve.

Background

The control valve is made up of two main components: the valve body assembly and the actuating mechanism assembly are divided into four series: single seat series control valve, double seat series control valve, sleeve series control valve and self-operated series control valve. Variations of the four types of valves can result in a myriad of different applicable configurations, each with its particular applications, features, advantages and disadvantages.

The existing control valve comprises a valve body, a valve cover arranged on the valve body and a valve rod arranged on the valve cover, wherein a valve seat is arranged in the valve body, an actuating mechanism is arranged on the valve cover, and a valve core matched with the valve seat for sealing is arranged at one end, located inside the valve body, of the valve rod. In order to ensure the sealing performance of the control valve, the sealing ring is arranged between the valve core and the valve seat of the existing control valve, and the sealing performance of the control valve is ensured through the sealing ring.

When the control valve is applied to the use working condition of a corrosive medium, the material of the sealing ring needs to be correspondingly adjusted, so that the sealing ring can be suitable for the use working condition of the corrosive medium. The high-performance sealing ring has extremely high cost, and some materials even need to be imported; therefore, in order to consider the production cost, the existing valve manufacturing enterprises do not use high-performance sealing rings, and often select the sealing rings with the performance which can generally ensure the normal profit of the enterprises. The use of the sealing ring brings about the problem of the service life of the sealing ring, and the sealing ring needs to be replaced after the existing control valve is used for a certain period. When the existing control valve is used for replacing the sealing ring, a plurality of parts need to be disassembled, and a plurality of sealing parts of the valve need to be disassembled in the disassembling process, so that the replacing operation of the sealing ring is very complicated and takes long time; and the sealing part for disassembling the valve can easily influence the later sealing performance of the valve.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can realize the convenient change to the sealing washer and can not influence the cylinder type control valve of the sealing performance of valve itself.

The above technical purpose of the present invention can be achieved by the following technical solutions: a cylinder type control valve comprises a valve body and a valve seat arranged in the valve body, wherein an upper valve cover is arranged right above the valve seat of the valve body, a lower valve cover is arranged right below the valve seat, the valve body and the upper valve cover and the valve body and the lower valve cover are connected through bolts, a valve rod is arranged on the upper valve cover, a valve core arranged between the valve seat and the lower valve cover is arranged on the valve rod, a limit stop ring is fixedly arranged above the valve core, a valve core sleeve is arranged on the valve rod and can move axially along the valve rod, a sealing ring which is pressed by the valve core and matched with the valve seat for sealing is arranged between the valve core and the limit stop ring, a positioning pin which penetrates through the valve rod and is used for positioning the valve core to press and hold the sealing ring is arranged on the outer surface of the valve core, a positioning sleeve which is used for limiting the positioning.

Through adopting above-mentioned technical scheme, when will changing the sealing washer, the staff opens lower valve gap through unscrewing the bolt, rotates the position sleeve with case threaded connection again, thereby makes position sleeve and case separation expose the locating pin. The positioning pin is pulled out from the valve core, so that the valve core and the valve rod can be separated, and the sealing ring can be replaced. The replacement mode does not involve the disassembly of the valve sealing part and does not influence the original sealing performance of the valve; and the number of disassembly parts involved in the operation flow is small, so that the replacement operation is simpler and more convenient.

Further setting the following steps: the valve rod comprises an upper rod body and a lower rod body in threaded connection with the upper rod body, the limiting blocking ring is arranged on the lower rod body, and the end face of the free end of the lower rod body is provided with a rotating protrusion which extends outwards and is hexagonal in cross section.

Through adopting above-mentioned technical scheme, the mode of going up the body of rod and lower body of rod threaded connection can finely tune the distance between sealing washer and the disk seat, prevents that the valve from influencing the sealing performance of valve because of the permanent not hard up problem between the part. The lower valve cover is opened, the upper rod body is fixed by one hand of a worker, the other hand of the worker rotates through the tool to rotate the protruding mode, the upper rod body and the lower rod body can be separated, the whole lower rod body can be taken out from the valve body, and the sealing ring can be replaced more conveniently.

Further setting the following steps: the valve comprises a flow channel arranged on a valve body, a sliding hole for the valve rod to penetrate and guide the valve rod to axially move is formed in a lower valve cover, a guide sleeve is arranged between the sliding hole and the valve rod, and a pressure balance hole is communicated between the sliding hole and the flow channel.

Through adopting above-mentioned technical scheme, the valve rod slides and sets up in the slide opening, carries on spacingly to the valve rod in moving, prevents that fluidic impact from causing deformation to the valve rod to setting up through the uide bushing can reduce the wearing and tearing between valve rod and the valve body between the two. And the pressure balance hole is arranged for balancing the internal pressure of the sliding hole, so that the normal sliding motion of the valve rod is ensured.

Further setting the following steps: when the sealing ring is matched with the valve seat for sealing, the limiting blocking ring is abutted against the valve seat to form sealing.

Through adopting above-mentioned technical scheme, the sealing washer supports and forms first sealed, and spacing fender ring supports and forms second sealed in the disk seat to realize the function of double containment.

Further setting the following steps: be equipped with the sealing filler between upper bonnet and the valve rod, the sealing filler includes first sealed group, goes up gasket, second sealed group and lower gasket from last to down in proper order along the axial of valve rod, first sealed group is including the packing ring and set up the O type circle between packing ring and valve rod.

Through adopting above-mentioned technical scheme, first sealed group and the sealed group realization of second go up the double seal between valve gap and the valve rod, and first sealed group carries on spacingly through the packing ring to the O type circle that sets up, and rethread O type circle forms sealing force.

Further setting the following steps: the second sealing group is composed of a plurality of packing sealing rings which are arranged along the axial direction of the valve rod, the cross section of each packing sealing ring is in an arc shape protruding upwards, and when the positions of side wings between the adjacent packing sealing rings are abutted, a gap is formed between the highest position and the lowest position of the adjacent packing sealing rings.

Through adopting above-mentioned technical scheme, the setting in clearance forms one between adjacent packing sealing ring two and supplies the packing sealing ring to carry out the interval of deformation for adjacent packing sealing ring can not superpose each other when the atress, ensures that every packing sealing ring can carry out better deformation when the atress, thereby reaches better sealed effect.

Further setting the following steps: an annular sealing gasket is arranged between the lower valve cover and the valve body, and an annular deformation cavity surrounding the circle center of the sealing gasket is arranged in the sealing gasket.

Through adopting above-mentioned technical scheme, sealed setting up of filling up increases down the sealed effect between valve gap and the valve body, makes sealed the emergence deformation that can be better when the atress of filling up through the setting in deformation chamber to realize better sealed.

To sum up, the utility model discloses following beneficial effect has: the utility model discloses on the basis of guaranteeing the original sealing performance of valve, can realize the convenient change to the sealing washer.

Drawings

FIG. 1 is a sectional view of the embodiment;

FIG. 2 is a partial schematic structural view of an embodiment;

FIG. 3 is an enlarged view of portion A of FIG. 1;

fig. 4 is an enlarged view of a portion B in fig. 1.

In the figure: 1. a valve body; 2. a valve seat; 3. an upper valve cover; 4. a lower valve cover; 5. a bolt; 61. a rod body is arranged; 62. a lower rod body; 7. a valve core; 8. a limit stop ring; 9. a seal ring; 10. positioning pins; 11. a positioning sleeve; 12. rotating the projection; 13. a flow channel; 14. a slide hole; 15. a guide sleeve; 16. a pressure balance hole; 17. sealing and filling; 171. a first seal group; 1711. a gasket; 1712. an O-shaped ring; 172. an upper liner; 173. a second seal group; 174. a lower liner; 18. a gap; 19. a gasket; 20. a deformation chamber.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 to 4, a cylinder type control valve includes a valve body 1, a flow passage 13 disposed in the valve body 1, and a valve seat 2 installed inside the valve body 1, wherein the valve seat 2 is in threaded connection with the valve body 1. The valve body 1 is arranged right above the valve seat 2 and is provided with an upper valve cover 3 and a lower valve cover 4, the lower valve cover is arranged right below the valve seat 2, and the valve body 1 and the upper valve cover 3 and the valve body 1 and the lower valve cover 4 are connected through bolts 5 to realize fixation. The upper valve cover 3 is provided with a valve rod, the valve rod comprises an upper rod body 61 and a lower rod body 62 which is connected with the upper rod body 61 in a threaded manner and coaxially arranged, a limiting blocking ring 8 surrounding the circle center of the lower rod body 62 is integrally arranged on the lower rod body 62, a valve core 7 positioned below the limiting blocking ring 8 is sleeved on the lower rod body 62, and the valve core 7 can axially reciprocate along the lower rod body 62. A sealing ring 9 is arranged between the valve core 7 and the limit stop ring 8, a positioning pin 10 penetrating through the valve core 7 and the lower rod body 62 is arranged on the outer surface of the valve core 7, and when the positioning pin 10 penetrates through the valve core 7 and the lower rod body 62, the valve core 7 and the limit stop ring 8 are matched for pressing and holding the fixing sealing ring 9. The valve core 7 is sleeved with a positioning sleeve 11 for limiting the positioning pin 10 to be separated from the valve core 7, and the positioning sleeve 11 is in threaded connection with the valve core 7.

The lower valve cover 4 is provided with a sliding hole 14 for the lower rod body 62 to penetrate through, a guide sleeve 15 is arranged between the sliding hole 14 and the lower rod body 62, and a pressure balance hole 16 is communicated between the sliding hole 14 and the flow passage 13. The end face of the free end of the lower rod body 62 is provided with a rotating bulge 12 which extends outwards and has a hexagonal cross section, a circular sealing gasket 19 is arranged between the lower valve cover 4 and the valve body 1, and a circular deformation cavity 20 surrounding the circle center of the sealing gasket 19 is arranged in the sealing gasket 19. When the sealing ring 9 abuts against the valve seat 2 to form a seal, the limit stop ring 8 also abuts against the valve seat 2 to form a seal.

The sealing packing 17 is arranged between the upper valve cover 3 and the upper rod body 61, the sealing packing 17 sequentially comprises a first sealing group 171, an upper gasket 172, a second sealing group 173 and a lower gasket 174 from top to bottom along the axial direction of the upper rod body 61, and the first sealing group 171 comprises a gasket 1711 and an O-ring 1712 arranged between the gasket 1711 and the upper rod body 61. The second sealing set 173 is composed of a plurality of packing sealing rings axially arranged along the upper rod body 61, the cross-sectional shape of each packing sealing ring is an upward convex arc, and when the positions of the side wings between the adjacent packing sealing rings are abutted, a gap 18 is formed between the highest position and the lowest position of the adjacent packing sealing rings. An air cylinder is fixedly arranged above the upper valve cover 3, and a piston rod of the air cylinder is fixedly connected with the upper rod body 61 and used for driving the valve rod to move along the axial direction.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. A cylinder type control valve characterized in that: the valve comprises a valve body (1) and a valve seat (2) arranged in the valve body (1), wherein the valve body (1) is provided with an upper valve cover (3) right above the valve seat (2) and is provided with a lower valve cover (4) right below the valve seat (2), the valve body (1) and the upper valve cover (3) and the valve body (1) and the lower valve cover (4) are connected through bolts (5), a valve rod is installed on the upper valve cover (3), a valve core (7) positioned between the valve seat (2) and the lower valve cover (4) is arranged on the valve rod, a limiting blocking ring (8) is fixedly arranged above the valve core (7), the valve core (7) is sleeved on the valve rod and can move axially along the valve rod, a sealing ring (9) which is pressed by the valve core (7) and the limiting blocking ring (8) and is matched with the valve seat (2) to seal, and a positioning pin (10) penetrating through the valve rod and used for positioning the valve core (7) to press the sealing ring (9) is arranged ) The positioning device is characterized in that a positioning sleeve (11) for limiting the positioning pin (10) to be separated from the valve core (7) is sleeved on the valve core (7), and the positioning sleeve (11) is in threaded connection with the valve core (7).

2. The cylinder-type control valve according to claim 1, characterized in that: the valve rod includes the body of rod (61) and with last body of rod (61) threaded connection's lower body of rod (62), spacing fender ring (8) set up in body of rod (62) down, the terminal surface of the body of rod (62) free end is equipped with outside extension and cross sectional shape is hexagonal rotation arch (12) down.

3. The cylinder-type control valve according to claim 1, characterized in that: the valve comprises a flow channel (13) arranged on a valve body (1), a sliding hole (14) for a valve rod to penetrate and guide the valve rod to move axially is arranged on a lower valve cover (4), a guide sleeve (15) is arranged between the sliding hole (14) and the valve rod, and a pressure balance hole (16) is communicated between the sliding hole (14) and the flow channel (13).

4. The cylinder-type control valve according to claim 1, characterized in that: when the sealing ring (9) is matched with the valve seat (2) for sealing, the limiting baffle ring (8) is propped against the valve seat (2) to form sealing.

5. The cylinder-type control valve according to claim 1, characterized in that: be equipped with between upper bonnet (3) and the valve rod sealing filler (17), sealing filler (17) are from last to including first sealed group (171), last gasket (172), second sealed group (173) and lower gasket (174) down in proper order along the axial of valve rod, first sealed group (171) are including packing ring (1711) and set up O type circle (1712) between packing ring (1711) and the valve rod.

6. The cylinder-type control valve according to claim 5, characterized in that: the second sealing group (173) is composed of a plurality of packing sealing rings which are axially arranged along the valve rod, the cross section of each packing sealing ring is in an upward-convex arc shape, and when the positions of side wings between the adjacent packing sealing rings are abutted, a gap (18) is formed between the highest position and the lowest position of the adjacent packing sealing rings.

7. The cylinder-type control valve according to claim 1, characterized in that: an annular sealing gasket (19) is arranged between the lower valve cover (4) and the valve body (1), and an annular deformation cavity (20) surrounding the circle center of the sealing gasket (19) is arranged in the sealing gasket (19).