Reducing valve element easy to disassemble and assemble

Abstract

A pressure reducing valve element easy to disassemble and assemble comprises a disassembling and assembling base and a shell. A dismounting head is arranged on the outer wall of the upper end of the dismounting seat; an external thread is arranged on the outer wall of the lower part of the dismounting seat; a connecting hole is formed in the center of the lower end surface of the dismounting seat; an internal thread is arranged on the inner wall of the lower part of the connecting hole; the connecting hole is in threaded connection with the upper part of the shell through the internal thread; an exhaust hole communicated with the connecting hole is formed in the center of the upper end of the dismounting seat; a pressure reduction structure matched with the exhaust hole is arranged in the upper part of the shell; a filtering structure matched with the shell is arranged in the lower part of the shell; a reset spring is arranged between the pressure reducing structure and the filtering structure; the outer diameter of the dismounting base is larger than that of the shell. According to the pressure reducing valve element easy to disassemble and assemble, self disassembly and assembly can be rapidly completed, and the situation that gas is polluted due to the fact that external impurities enter the pressure reducing valve element can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to an easy-to-disassemble pressure reducing valve spool. BACKGROUND

[0002] The pressure reducing valve is used for reducing high-pressure gas to low-pressure gas and keeping the stability of the outlet gas pressure and flow, and is applied to beer machines, coke machines and other devices needing gas supply.

[0003] The pressure reducing valve mainly relies on the valve core inside to open and close and control the discharge of gas. When the gas pressure rises, the valve core will open to send the gas to the outlet joint of the pressure reducing valve, realizing the effect of pressure reduction. The valve core of the traditional pressure reducing valve is composed of multiple components. Each component has its corresponding steps when being installed. After one component of the valve core is installed into the valve body of the pressure reducing valve, another component of the valve core can be installed into the valve body of the pressure reducing valve. In this way, each component is installed into the valve body of the pressure reducing valve. When all the components are installed, a complete valve core is formed in the valve body. This installation method needs each installation action to rely on the operation on the valve body. It is not only troublesome and affects the efficiency, but also easily brings impurities in the valve body into the valve core. Even if the valve core itself has a filter screen, it can filter the external gas flowing into the valve core. However, the original impurities in the valve core cannot be filtered and always exist, which can easily flow to the outlet joint of the pressure reducing valve along with the gas flowing through the pressure reducing valve, causing the filtered gas to be polluted again. At the same time, since the valve core needs to be installed into the valve body of the pressure reducing valve one by one, the valve core also needs to be disassembled one by one when disassembling, which affects the disassembly efficiency. SUMMARY

[0004] The utility model wants to solve the prior art problem to provide a kind of pressure reducing valve spool with easy disassembly, it not only can quickly complete the disassembly of itself, and can effectively avoid the situation that external impurities enter into itself inside and cause gas to be polluted.

[0005] The utility model solves the above technical problem by the technical scheme that:

[0006] The utility model discloses an easy-to-disassemble pressure reducing valve spool, which comprises a dismounting seat and a shell, an outer wall of the upper end of the dismounting seat is provided with a dismounting head, an outer wall of the lower part of the dismounting seat is provided with external threads, a connecting hole is arranged at the center of the lower end surface of the dismounting seat, internal threads are arranged on the inner wall of the lower part of the connecting hole, the connecting hole is screwed with the upper part of the shell through the internal threads, an exhaust hole is arranged at the center of the upper end of the dismounting seat and penetrates the connecting hole, a pressure reducing structure is arranged in the upper part of the shell and matches the exhaust hole, a filtering structure is arranged in the lower part of the shell and matches the pressure reducing structure, a return spring is arranged between the pressure reducing structure and the filtering structure, and the outer diameter of the dismounting seat is larger than the outer diameter of the shell.

[0007] The pressure-reducing structure comprises a pressure-receiving seat arranged in the upper part of the shell, a ventilation gap between the outer wall of the pressure-receiving seat and the inner wall of the shell, a sealing seat arranged at the center of the upper end surface of the pressure-receiving seat, a sealing cone surface with a narrow upper part and a wide lower part arranged on the outer wall of the upper part of the sealing seat, a valve rod arranged at the center of the upper end of the sealing seat, a sealing gasket in the shape of a ring arranged at the bottom of the connecting hole, the upper end surface of the shell being attached to the lower surface of the sealing gasket, the sealing cone surface blocking the lower end hole of the inner hole of the sealing gasket, the inner diameter of the sealing gasket and the diameter of the exhaust hole being larger than the diameter of the valve rod.

[0008] The lower surface of the pressure-receiving seat is provided with a clamping hole, and the upper end of the return spring is clamped in the clamping hole.

[0009] The filter structure comprises a copper filter screen and a stainless steel filter screen, the lower part of the shell is provided with a limiting step in the shape of a ring, the outer edge of the upper surface of the stainless steel filter screen is attached to the limiting step, the upper surface of the copper filter screen is attached to the lower surface of the stainless steel filter screen, the lower end of the shell is provided with a flange in the shape of a ring punched out of the shell, the flange can limit the downward movement of the copper filter screen, and the lower end of the return spring is pressed against the center of the upper surface of the stainless steel filter screen.

[0010] The upper surface of the sealing gasket is provided with a groove in the shape of a ring, and the groove width gradually decreases from top to bottom.

[0011] The upper end surface of the dismounting seat is provided with a T-shaped groove, the exhaust hole is arranged at the center of the bottom of the T-shaped groove, and the upper end of the valve rod passes through the T-shaped groove upwardly.

[0012] The outer wall of the dismounting head and the outer wall of the middle part of the shell are both in the shape of a regular hexagon.

[0013] The upper part of the dismounting seat is provided with a ring-shaped groove below the dismounting head, and the ring-shaped groove is provided with a sealing ring matched therewith.

[0014] The beneficial effects of the utility model are as follows:

[0015] Compared with the prior art, the detachable pressure reducing valve spool adopting the structure of the utility model can be integrally screwed and fixed in the pressure reducing valve body through the external threads on the outer wall of the dismounting seat, and the outer diameter of the dismounting seat is larger than the outer diameter of the shell, so when the dismounting seat is fixed in the screw hole of the valve body, the outer wall of the shell will not contact the inner wall of the screw hole of the valve body, and when the dismounting seat is screwed out of the screw hole of the valve body through the dismounting head, the presence of the shell will not cause any obstruction, and at the same time, the shell is firmly fixed on the dismounting seat, and the dismounting seat and the shell are synchronously dismounted when the dismounting seat is dismounted from the screw hole of the valve body, so that the valve body can be integrally installed through the screwing of the dismounting seat in the screw hole of the valve body after the assembly of the valve spool in a sterile environment, and the detachable effect is realized, and the integrally dismounting of the valve spool can effectively avoid the situation that the impurities in the pressure reducing valve body fall into the valve spool when the components of the valve spool are installed in the pressure reducing valve body one by one, so that the situation that the gas filtered by the original filtering structure is polluted again due to the existence of impurities in the valve spool is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is the sectional view of the detachable pressure reducing valve spool of the utility model;

[0017] Fig. 2 is the structural schematic view of the detachable pressure reducing valve spool of the utility model;

[0018] Fig. 3 is the perspective view of the detachable pressure reducing valve spool of the utility model. DETAILED DESCRIPTION

[0019] The application will be further described in detail in combination with the drawings and specific embodiments:

[0020] Please refer to Figs. 1 to 3 , the utility model provides a kind of detachable pressure reducing valve spool, including dismounting seat 1, shell 2;The outer wall of the upper end of the dismounting seat 1 is equipped with a dismounting head 3;The outer wall of the lower part of the dismounting seat 1 is equipped with external thread 4;The lower end surface center of the dismounting seat 1 is equipped with a connecting hole 5;The inner wall of the lower part of the connecting hole 5 is equipped with internal thread 6;The connecting hole 5 is screwed with the upper part of shell 2 by internal thread 6;The upper end center of the dismounting seat 1 is equipped with exhaust hole 7 that is through with connecting hole 5;The upper part of shell 2 is equipped with the pressure reducing structure that is matched with exhaust hole 7;The lower part of shell 2 is equipped with the filtering structure that is matched with it;Reset spring 8 is equipped between the pressure reducing structure and the filtering structure;The outer diameter of the dismounting seat 1 is greater than the outer diameter of shell 2.

[0021] The pressure reducing structure comprises a pressure receiving seat 9 arranged in the upper portion of the shell 2, and a ventilation gap 10 is arranged between the outer wall of the pressure receiving seat 9 and the inner wall of the shell 2; a sealing seat 11 is arranged at the center of the upper end surface of the pressure receiving seat 9; a sealing taper surface 12 in the shape of a taper narrowing from top to bottom is arranged on the outer wall of the upper portion of the sealing seat 11; a valve rod 13 is arranged at the center of the upper end of the sealing seat 11; a sealing gasket 14 in the shape of a ring is arranged at the bottom of the connecting hole 5, and the upper end surface of the shell 2 is attached to the lower surface of the sealing gasket 14; the sealing taper surface 12 blocks the lower end opening of the inner hole 1401 of the sealing gasket 14; the upper end of the valve rod 13 passes through the inner hole 1401 of the sealing gasket 14 and the exhaust hole 7 in sequence; the inner diameter of the sealing gasket 14 and the diameter of the exhaust hole 7 are both larger than the diameter of the valve rod.

[0022] A clamping hole 15 is arranged at the center of the lower surface of the pressure receiving seat 9, and the upper end of the reset spring 8 is clamped in the clamping hole 15.

[0023] The filtering structure comprises a copper filter screen 16 and a stainless steel filter screen 17; a limiting step 18 in the shape of a ring is arranged in the lower portion of the shell 2; the outer edge of the upper surface of the stainless steel filter screen 17 is attached to the limiting step 18; the upper surface of the copper filter screen 16 is attached to the lower surface of the stainless steel filter screen 17; a flange 19 in the shape of a ring is punched on the lower end of the shell 2, and the flange 19 can limit the downward movement of the copper filter screen 16; the lower end of the reset spring 8 is pressed against the center of the upper surface of the stainless steel filter screen 17.

[0024] An annular groove 20 is arranged on the upper surface of the sealing gasket 14, and the groove width gradually decreases from top to bottom.

[0025] A T-shaped groove 21 is arranged at the center of the upper end surface of the dismounting seat 1; the exhaust hole 7 is arranged at the center of the groove bottom of the T-shaped groove 21, and the upper end of the valve rod 13 passes through the T-shaped groove 21 upwards.

[0026] The outer wall of the dismounting head 3 and the outer wall of the middle portion of the shell 2 are both in the shape of a regular hexagon.

[0027] An annular groove 22 is arranged on the upper portion of the dismounting seat 1 below the dismounting head 3; a sealing ring 23 matched with the annular groove 22 is arranged in the annular groove 22.

[0028] The use method of the utility model is as follows:

[0029] The valve body of the pressure reducing valve is provided with a threaded hole on the same channel as the gas outlet connector, and the dismounting seat 1 can be directly screwed and fixed in the threaded hole of the valve body through the external thread 4 to quickly complete the fixation of the dismounting seat 1. Although the shell 2 is screwed at the upper end into the connecting hole 5 in the center of the lower end surface of the dismounting seat 1, the outer diameter of the dismounting seat 1 is larger than the outer diameter of the shell, so when the dismounting seat 1 is fixed in the threaded hole of the valve body, the outer wall of the shell 2 will not come into contact with the inner wall of the threaded hole of the valve body. When the dismounting seat 1 is unscrewed from the threaded hole of the valve body through the dismounting head 3, the presence of the shell 2 will not cause any obstruction, at the same time, the shell 2 will be firmly fixed on the dismounting seat 1, and as the dismounting seat 1 is dismounted from the threaded hole of the valve body, the synchronous dismounting of the dismounting seat 1 and the shell is realized. This structure design enables the valve core to complete the assembly of various parts of the valve core in a sterile environment before being installed. When the valve core is assembled, only the installation action of screwing the dismounting seat 1 into the threaded hole of the valve body can complete the overall installation of the valve body, realize easy dismounting, and the overall dismounting of the valve core can effectively avoid the situation that impurities fall into the valve core from the pressure reducing valve body due to the installation of the parts of the valve core in the pressure reducing valve body one by one, thereby avoiding the situation that the gas filtered by the original filtering structure is polluted again due to the existence of impurities in the valve core.

[0030] At the same time, the upper end of the shell 2 is screwed into the connecting hole 5 in the center of the lower end surface of the dismounting seat 1. This fixing method makes the dismounting between the shell 2 and the dismounting seat 1 extremely simple. Only by rotating the shell 2 can the shell 2 be dismounted from the dismounting seat 1, thereby realizing the quick dismounting of the internal parts of the shell 2.

[0031] When the valve core is screwed and fixed in the threaded hole of the valve body through the external thread 4 on the outer wall of the dismounting seat 1, the rising gas passes through the copper filter screen 16 and the stainless steel filter screen 17 upwards from the lower end of the shell 2. When the gas flows through the copper filter screen 16 and the stainless steel filter screen 17, the impurities mixed in the gas are intercepted below the copper filter screen 16. At the same time, the filtering precision of the stainless steel filter screen 17 is higher than that of the copper filter screen 16. After the copper filter screen 16 preliminarily filters the impurities in the gas, the stainless steel filter screen 17 can further filter the small-particle impurities in the gas that have not been filtered, thereby maximizing the filtering quality.

[0032] When the gas passes through the copper filter screen 16 and the stainless steel filter screen 17 upwards, the gas continues to flow upwards through the air gap between the outer wall of the pressure seat 9 and the inner wall of the shell 2 to the upper side of the pressure seat. When the lower end of the inner hole 1401 of the sealing gasket 14 is blocked by the sealing cone surface 12, as the gas continues to flow into the space above the pressure seat 9, the air pressure in the space above the pressure seat 9 increases and pushes the upper surface of the pressure seat 9 downward. At this time, the pressure seat 9 is pressed downward and the compression spring 8 is compressed. When the pressure seat 9 moves downward, the sealing seat 11 and the sealing cone surface 12 move downward synchronously. At this time, the lower end of the inner hole 1401 of the sealing gasket 14 is no longer blocked by the sealing cone surface 12. Since the inner diameter of the sealing gasket 14 and the diameter of the exhaust hole 7 are both larger than the diameter of the valve stem 13, the gas flows upwards through the lower end of the inner hole 1401 of the sealing gasket 14, the gap between the inner wall of the inner hole of the sealing gasket 14 and the outer wall of the valve stem 13, the gap between the inner wall of the exhaust hole 7 and the outer wall of the valve stem 13, and finally flows through the channel in the valve body to the gas outlet connector of the pressure reducing valve, completing the work of exhaust pressure reduction. When the air pressure returns to normal, the compression spring 8 pushes the pressure seat upward by the elastic force generated by its compression, so that the sealing cone surface 12 moves upward and resets, blocking the lower end of the inner hole 1401 of the sealing gasket 14 again, and the valve core is in the closed state.

[0033] The lower surface of the pressure seat 9 is provided with a clamping hole 15, and the upper end of the compression spring 8 is clamped in the clamping hole 15. The existence of the clamping hole 15 can ensure the stability of the upper end of the compression spring 8, thereby ensuring the stability of the compression spring 8 when it is compressed and expanded.

[0034] The upper surface of the sealing gasket 14 is provided with an annular groove 20, and the groove width gradually decreases from top to bottom. The existence of the groove 20 can effectively increase the compression deformation amount of the sealing gasket 14, further ensuring the sealing performance when the sealing cone surface 12 blocks the lower end of the inner hole of the sealing gasket 14.

[0035] The center of the upper end surface of the dismounting seat 1 is provided with a T-slot 21, and the exhaust hole 7 is arranged at the center of the bottom of the T-slot 21. The upper end of the valve stem 13 passes through the T-slot 21 upward. The existence of the T-slot 21 not only can accommodate the valve stem 13, ensure that the valve stem 13 has enough length, avoid the valve stem 13 from being separated from the exhaust hole 7 and the inner hole 1401 of the sealing gasket 14 when it moves downward, but also can be easily rotated by a T-slot screwdriver clamped in the T-slot 21, which is convenient for dismounting and mounting the dismounting seat 1.

[0036] The outer wall of the dismounting head 3 and the outer wall of the middle part of the shell 2 are regular hexagons. Only a corresponding sleeve wrench is needed to easily rotate the dismounting head 3 and the shell 2, so that the dismounting seat 1 can be easily dismounted from the valve body of the pressure reducing valve, and the shell 2 can be easily dismounted from the dismounting seat 1.

[0037] The upper part of the dismounting seat 1 is provided with an annular groove 22 below the dismounting head 3, and a sealing ring 23 matched with the annular groove 22 is arranged in the annular groove 22. The sealing ring 23 can ensure the sealing when the valve core is screwed and fixed in the screw hole of the valve body of the pressure reducing valve, so as to avoid the leakage.

[0038] Since the connecting hole 5 in the center of the lower end surface of the dismounting seat 1 is screwed with the upper end of the shell 2 through the internal thread 6, the shell 2 can be directly rotated to adjust the distance between the filtering structure and the sealing gasket 14, change the initial compression degree of the return spring 8, change the initial elastic force of the return spring 8, thereby changing the preset pressure of the pressure reducing valve, and more pressure reduction conditions can be adapted.

Claims

1. A field removable pressure reducing valve trim comprising: The utility model relates to a kind of dismounting seat, shell;The outer wall of the upper end of the dismounting seat is equipped with a dismounting head;The outer wall of the lower part of the dismounting seat is equipped with external thread;The center of the lower end surface of the dismounting seat is equipped with a connecting hole;The inner wall of the lower part of the connecting hole is equipped with internal thread;The connecting hole is screwed with the upper part of the shell by internal thread;The center of the upper end of the dismounting seat is equipped with exhaust hole that is penetrated with the connecting hole;The upper part of the shell is equipped with pressure relief structure that is matched with exhaust hole;The lower part of the shell is equipped with filter structure that is matched with it;Reset spring is equipped between pressure relief structure and filter structure;The outer diameter of the dismounting seat is greater than the outer diameter of the shell.

2. A removable pressure reducing valve spool according to claim 1, wherein: The pressure relief structure includes the pressure receiving seat in the upper part of the shell, and the outer wall of the pressure receiving seat is provided with a ventilation gap between the inner wall of the shell;The center of the upper end surface of the pressure receiving seat is equipped with a sealing seat;The upper outer wall of the sealing seat is equipped with a sealing cone surface that is narrow at the top and wide at the bottom;The center of the upper end of the sealing seat is equipped with a valve rod;The bottom of the connecting hole is equipped with a sealing gasket in the form of a ring, and the upper end surface of the shell is attached to the lower surface of the sealing gasket;The sealing cone surface blocks and seals the lower end of the inner hole of the sealing gasket;The inner diameter of the sealing gasket and the diameter of the exhaust hole are both greater than the diameter of the valve rod.

3. A removable pressure reducing valve cartridge according to claim 2 wherein: The lower surface of the pressure receiving seat is equipped with a clamping hole, and the upper end of the reset spring is clamped in the clamping hole.

4. The easily removable pressure reducing valve spool of claim 1, wherein: The filter structure includes a copper filter screen and a stainless steel filter screen;The lower part of the shell is equipped with a limiting step in the form of a ring;The outer edge of the upper surface of the stainless steel filter screen is attached to the limiting step;The upper surface of the copper filter screen is attached to the lower surface of the stainless steel filter screen;The lower end of the shell is punched to form a flange in the form of a ring, and the flange can limit the downward movement of the copper filter screen;The lower end of the reset spring is pressed against the center of the upper surface of the stainless steel filter screen.

5. The easily removable pressure reducing valve trim according to claim 2, wherein: The upper surface of the sealing gasket is equipped with a groove in the form of a ring, and the groove width gradually decreases from top to bottom.

6. A removable pressure reducing valve cartridge according to claim 2 wherein: The center of the upper end surface of the dismounting seat is equipped with a T-slot;The exhaust hole is arranged at the center of the bottom of the T-slot, and the upper end of the valve rod passes through the T-slot upward.

7. The easily removable pressure reducing valve spool of claim 1, wherein: The outer wall of the dismounting head and the outer wall of the middle part of the shell are both regular hexagons.

8. The easily removable pressure reducing valve trim according to claim 1, wherein: The upper part of the dismounting seat is equipped with an annular groove below the dismounting head;The annular groove is equipped with a sealing ring that is matched therewith.

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