Dismantling device for packing gland of valve rod of valve

Abstract

The utility model discloses a valve rod packing gland dismantling device which comprises two clamping sleeves which are detachably spliced together through a connecting screw rod, and a splicing hole which can be clamped into a groove of a sealing packing gland is formed in the splicing edge. The number of the connecting screws is two, the two connecting screws stretch across the splicing edges on the two sides of the splicing hole respectively, and the ends of the connecting screws are connected with positioning connecting blocks which are fixed to the clamping sleeve and provided with through holes and fixed through nuts. According to the utility model, the structure is simple, the adaptability with the groove of the packing gland of the valve rod is strong, uniform and controllable axial force application can be provided through the rotation of the jackscrew, violent dismounting is not needed, the damage to the valve rod, the packing gland or the valve body is avoided, and the service life of the valve rod, the packing gland or the valve body is prolonged; and meanwhile, the influence of installation space is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of valve stem packing gland's dismantling device, belong to mechanical assembly field. BACKGROUND

[0002] In industrial fluid control system, valve as core control element bears the important role of cutting off, regulating and guiding medium. The structure of valve is shown in Figure 5 As shown in the figure, including valve body 10 and valve stem 6, the circumferential packing compartment of valve stem 6 is filled with packing 8, and the packing 8 is axially compressed and fixed by valve stem packing gland 7, and the top of valve stem packing gland 7 is fixed by compression panel 11. As a key sealing component of valve, the function of valve stem packing gland 7 is to ensure the dynamic sealing performance between valve stem 6 and valve body by axially compressing the packing 8 in packing compartment. However, in the long-term operation process, affected by medium corrosion, temperature change and mechanical wear, the packing is prone to aging, hardening or failure phenomenon, and regular maintenance and replacement are needed to ensure the reliability of valve sealing.

[0003] At present, the dismantling operation of valve stem packing gland generally relies on traditional hand tools (such as crowbar, hammering or universal wrench). Such method has the following defects: first, the packing gland and the valve body often generate large dismantling resistance due to rust or interference fit, and manual tools are difficult to provide uniform and controllable axial force, which can easily lead to deformation of packing gland, bending of valve stem and even damage of valve body connection thread; second, conventional tools lack adaptability to the groove structure of packing gland, and are prone to slipping or eccentric force during operation, which not only reduces efficiency, but also may cause secondary equipment failure due to impact load. In addition, some special working conditions (such as limited space pipeline installation position or high pressure valve) have higher requirements for the compactness and operation safety of dismantling tool.

[0004] Although there are some special dismantling devices on the market, they have complex structure, insufficient universality and high manufacturing cost. Therefore, it is urgent to develop a valve stem packing gland dismantling device with simple structure, strong applicability and uniform and controllable axial force to overcome the defects of existing technology and improve the efficiency and safety of maintenance operation. UTILITY MODEL CONTENTS

[0005] The utility model provides a valve stem packing gland dismantling device to solve the above technical problems, which has simple structure, strong adaptability to the groove of valve stem packing gland, and can provide uniform and controllable axial force through the rotation of jackscrew without violent dismantling, so as to prolong the service life of valve stem, packing gland or valve body without affecting the installation space.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] The utility model discloses a valve stem packing gland removing device, including two sleeves spliced together through connecting screw, and the splicing edge is provided with splicing hole that can be clamped into the recess of sealing packing gland, the connecting screw has two, respectively across the splicing edge of splicing hole both sides, and the end is connected with the positioning connecting block with through -hole fixed on the sleeve and is fixed through the nut, the sleeve is also provided with the tapper hole, and is equipped with the tapper.

[0008] The further improvement of the utility model technical scheme lies in that the sleeve is of square structure, and a semicircular hole constituting the splicing hole is formed on the splicing edge.

[0009] The further improvement of the utility model technical scheme lies in that the semicircular hole is arranged at the middle part of the splicing edge of the sleeve.

[0010] The further improvement of the utility model technical scheme lies in that the corner position of the sleeve is arranged as a rounded corner.

[0011] The further improvement of the utility model technical scheme lies in that the tapper hole is located at the both end positions of the two sleeves along the length direction after splicing.

[0012] The further improvement of the utility model technical scheme lies in that the center of the tapper hole and the splicing hole is located on the same central axis.

[0013] Due to the adoption of the above technical scheme, the utility model has the following technical progress:

[0014] The utility model has the advantages of simple structure, strong adaptability to the recess of the valve stem packing gland, uniform and controllable axial force provided by the rotation of the tapper, no need of violent removal, no damage to the valve stem, packing gland or valve body, prolonged service life, no influence of installation space and stronger applicability.

[0015] The two sleeves of the utility model are spliced together, the middle splicing hole is clamped into the recess of the sealing packing gland, and then the two are fixed together through the connecting screw, so that the installation and removal are convenient, and the size and thickness of the sleeve and the size of the splicing hole can be adjusted according to the size of the valve stem packing gland, so that the utility model has strong versatility.

[0016] The splicing hole of the utility model is arranged at the middle part of the splicing edge of the sleeve, so that the two connecting screws have enough installation positions, the center of the tapper hole and the splicing hole is located on the same central axis, and the tapper hole is located at the both end positions of the two sleeves along the length direction after splicing, so that the force of the tapper is more easily applied to the valve stem packing gland, and the valve stem packing gland is more easily removed. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1It is the structure schematic view of the utility model;

[0018] Figure 2 It is the structure schematic view of the utility model Figure 1 ;

[0019] Figure 3 It is the top view of the utility model Figure 1 ;

[0020] Figure 4 It is the structure schematic view of the utility model in use;

[0021] Figure 5 It is the valve structure schematic view;

[0022] Among them, 1, the sleeve, 2, the top screw hole, 3, the nut, 4, the positioning connecting block, 5, the connecting screw, 6, the valve stem, 7, the sealing packing gland, 8, the packing, 9, the splicing hole, 10, the valve body, 11, the compression panel. Specific implementation

[0023] The utility model makes further detailed explanation in combination with examples:

[0024] The utility model discloses a valve stem packing gland removing device, and the novel structure is simple, and the groove of the valve stem packing gland is strong in adaptability, can provide even and controllable axial force through the rotation of the top screw, does not need to violently remove, and will not cause damage to the valve stem, the packing gland or the valve body, prolongs its service life, is not influenced by the installation space simultaneously, and is more suitable.

[0025] The specific structure is as shown in Figures 1-3 , including two square structure's sleeves 1, with one side being splicing edge detachably spliced together, and being fixed through the connecting screw 5 of both sides.Half round holes are formed in the splicing edge of each sleeve 1, and form splicing holes 9 after being spliced together, and the splicing holes 9 are generally located in the middle of the splicing edge, can be clamped into the groove of the sealing packing gland 7, and the size of the splicing hole 9 is designed according to the diameter of the gland groove.

[0026] The connecting screw 5 has two, and is across the splicing edge on both sides of the splicing hole 9, and the end is connected with the positioning connecting block 4 fixed on the sleeve 1, and the positioning connecting block 4 is provided with a through hole for the connecting screw 5 to pass through, then is fastened through the nut 3, realizes the fixed of the splicing of two sleeves 1.

[0027] The sleeve 1 is also provided with the top screw hole 2, and is matched with the top screw.The top screw hole 2 is located at the both end positions of the two sleeves after splicing along the length direction, and the center of the top screw hole 2 and the splicing hole 9 is located on the same central axis, and such structure setting makes the force of the top screw more easily act on the valve stem packing gland, so that it is more easily removed.

[0028] Further, the corner positions of the sleeve 1 are provided with rounded corners, which can prevent scratching the workers during use.

[0029] The valve stem packing gland 7 is a key sealing component of the valve, and its function is to ensure the dynamic sealing performance between the valve stem 6 and the valve body by axially compressing the packing 8 in the packing chamber. However, during long-term operation, the packing 8 is prone to aging, hardening or failure due to the influence of medium corrosion, temperature change and mechanical wear, and needs to be regularly maintained and replaced to ensure the reliability of the valve sealing.

[0030] When the packing 8 is replaced using the utility model, as shown in the figure, first, the compression panel 11 of the valve is removed to expose the sealing packing gland 7, and then the two sleeves 1 are respectively clamped into the grooves of the sealing packing gland 7, and the spliced holes 9 are tightly attached to the sealing packing gland 7. Figure 4 Then the connecting screw 5 is respectively inserted into the same side positioning connecting block 4, and then the nut 3 is tightened to fasten the sleeves 1. Finally, the jackscrew is screwed into the jackscrew hole 2 until the jackscrew end is on the valve body, and then the jackscrew is continuously rotated in the tightening direction, so that the sleeve 1 will move upwards along the jackscrew to lift the sealing packing gland 7 until the sealing packing gland 7 is completely lifted out, and then the packing 8 can be replaced.

Claims

1. A valve stem packing gland removal device characterized by: The utility model relates to a detachable joint of two sleeves (1) through connecting screw rod (5), and the joint edge is provided with joint hole (9) which can be clamped into the recess of sealing filler cover (7); the connecting screw rod (5) has two, respectively across the joint edge of both sides of joint hole (9), and the end is connected with the positioning connecting block (4) with through hole fixed on the sleeve (1), and is fixed through nut (3); the sleeve (1) is also provided with jackscrew hole (2), and is equipped with jackscrew.

2. A valve stem packing gland removal device according to claim 1, wherein: The sleeve (1) is square structure, and the joint edge is provided with semicircular hole which constitutes joint hole (9).

3. A valve stem packing gland removal device according to claim 2, wherein: The semicircular hole is arranged at the middle part of the joint edge of the sleeve (1).

4. A valve stem packing gland removal device according to claim 2, wherein: The corner position of the sleeve (1) is arranged as round angle.

5. The valve stem packing gland removal device of claim 1, wherein: The jackscrew hole (2) is located at the both end position of the sleeve along the length direction after jointing.

6. A valve stem packing gland removal device according to claim 5, wherein: The center of the jackscrew hole (2) and joint hole (9) is located on the same central axis.

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