CN116412290A - A quick-release valve cover - Google Patents

Abstract

The invention discloses a valve cover capable of being quickly disassembled and assembled, which comprises a cylinder cover flange and a compression hydraulic cylinder assembly, wherein the outer surface of the compression hydraulic cylinder assembly is in threaded connection with the upper half part of the inner surface of the cylinder cover flange, a retaining disc is fixedly connected to the outer part of the compression hydraulic cylinder assembly and positioned at the top of the cylinder cover flange through a first screw, the outer side of the retaining disc is pressed on the top of the cylinder cover flange, and a plurality of semi-conical holes are uniformly formed in the outer side of the retaining disc. This quick assembly disassembly's valve gap through setting up locking dish, locking screw cooperation cylinder cap flange on locking screw hole for need not to apply great moment of torsion to the valve gap screw thread when no matter installing or dismantling, adopt less tightening torque take it tight and to its locking can during the installation, and then can avoid the not hard up problem of valve gap, also reduced the intensity of labour when hydraulic end valve assembly changes and maintains often.

Description

A quick-release valve cover

technical field

The invention relates to the technical field of oil drilling equipment, in particular to a quick disassembly valve cover.

Background technique

At present, the plugs of the valve assembly in the hydraulic end of drilling pumps or fracturing pumps all use a valve cover with a large-pitch trapezoidal thread to compress them. High, and the pressure fluctuates greatly, so the valve cover is easy to loosen in this case, resulting in the rapid failure of the seal at the plug of the valve assembly, and even the high-pressure fluid in the liquid cylinder will puncture the liquid cylinder. In addition, the existing bonnet pressing structure needs to apply a large torque no matter whether it is installed or disassembled, which increases the labor intensity of the frequent replacement and maintenance of the hydraulic end valve assembly and reduces the work of the drilling pump or fracturing pump. efficiency and machine reliability.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a quick dismountable valve cover, which solves the problems of excessive labor intensity and low efficiency when replacing or maintaining the hydraulic cylinder valve assembly of a drilling pump or a fracturing pump.

In order to achieve the above purpose, the present invention is achieved through the following technical solutions: a quick disassembly valve cover, including a cylinder head flange and a compression cylinder assembly, and the outer surface of the compression cylinder assembly and the cylinder cover method The upper half of the inner surface of the flange is threaded, and the outside of the compression cylinder assembly and the top of the cylinder head flange are fixedly connected with a backstop disc through the first screw, and the outer side of the backstop disc is covered by the cylinder head method. On the top of the flange, several semi-tapered holes are evenly opened on the outer side of the anti-retraction disc, and anti-loosening screw holes are provided on the top of the cylinder head flange, and the anti-retraction disc can pass through one of the semi-conical holes and The anti-loosening screw of the threaded connection of the anti-loosening screw hole is fixed on the top of the cylinder head flange.

Preferably, the pressing cylinder assembly mainly includes a pressing hydraulic cylinder, a second screw, a third screw, a piston, a cylinder head, a piston rod, a first O-ring, a second O-ring and a third O-ring The center of the top of the compression hydraulic cylinder is provided with a hydraulic cylinder oil inlet, the cylinder cover is threadedly connected to the bottom of the compression hydraulic cylinder, and the first O-ring is sleeved on the outside of the cylinder cover, and the piston is slidably connected to the compression cylinder. Tighten the inside of the hydraulic cylinder, and the second O-ring is sleeved on the outer surface of the piston, the top end of the piston rod is fixedly connected to the bottom of the piston through the third screw embedded, and the third O-ring is arranged in the bottom of the piston Inside the caulking groove, the second screw penetrates the compression hydraulic cylinder and is compressed on the top of the cylinder head.

Preferably, the bottom end of the piston rod is fixedly connected with a pressure plate, and a slideway is provided between the bottom of the cylinder head and the top of the pressure plate and the side of the piston rod, and the bottom surface of the slideway on the top of the pressure plate is an inclined plane.

Preferably, the upper and lower two sets of slideways are intersected with two rows, and the insides of the two rows of slideways are respectively provided with a first wedge-shaped slider group and a second wedge-shaped slider group.

Preferably, both the first wedge-shaped slider group and the second wedge-shaped slider group are composed of a left wedge-shaped slider, a right wedge-shaped slider, a tie rod screw, a circlip and a plug, and the left end of the pull-rod screw is connected to the left wedge-shaped slider. The inner surface of the block is threaded, the snap ring and the plug are respectively sleeved on the outside of the right end of the pull rod screw from left to right, and the right wedge-shaped slider is sleeved on the outside of the pull rod screw and is threaded with the outer surface of the plug.

Preferably, both ends of the tie rod screw are covered with compression springs, and the two ends of the two compression springs respectively abut the left wedge-shaped slider and the inner surface of the compression hydraulic cylinder and the right wedge-shaped slider and the inner surface of the compression hydraulic cylinder .

Preferably, the side of the cylinder head flange is provided with an operation hole, and the cylinder head flange is fixedly connected to the top of the high-pressure pump liquid cylinder through several liquid cylinder connecting screws, and the center of the top of the high-pressure pump liquid cylinder is crimped with The valve assembly is plugged, and the pressure plate is pressed tightly on the top of the valve assembly plug.

Beneficial effect

The invention provides a quickly disassembled valve cover. Compared with the prior art, it has the following beneficial effects:

(1) For the quick dismounting bonnet, by setting the anti-retraction plate and the anti-loosening screw to cooperate with the anti-loosening screw hole on the flange of the cylinder head, there is no need to apply a large torque to the thread of the bonnet during installation or disassembly , When installing, use a small tightening torque to tighten it and prevent it from loosening, thereby avoiding the problem of valve cover loosening, and also reducing the labor intensity of frequent replacement and maintenance of the hydraulic end valve assembly.

(2) The quick dismountable bonnet can press the hydraulic cylinder of the quick dismountable bonnet according to the requirements by pressing the structure in the hydraulic cylinder assembly, and then use the quick dismountable valve cover without releasing the pressure. The wedge-shaped pressing mechanism of the dismounting bonnet expands and tightens the piston of the quick-disassembling bonnet. Since the wedge-shaped block pressing structure has good self-locking and automatic anti-loosening functions, the quick-disassembling bonnet can The function of pressing the plug of the valve assembly will not be lost after the pressure is relieved. The quick disassembly valve cover has a simple and novel structure and is easy to operate.

Description of drawings

Fig. 1 is the assembly schematic diagram of the present invention;

Fig. 2 is the explosion schematic diagram of the present invention;

Fig. 3 is the perspective view of cylinder head flange of the present invention;

Fig. 4 is a sectional view of the pressing fluid cylinder assembly of the present invention;

Fig. 5 is an exploded view of the pressing fluid cylinder assembly of the present invention;

Fig. 6 is a structural schematic diagram of the compression hydraulic cylinder of the present invention;

Fig. 7 is the structural representation of piston of the present invention;

Fig. 8 is a perspective view of the cylinder head of the present invention;

Fig. 9 is a perspective view of the piston rod and the pressure plate of the present invention;

Fig. 10 is a schematic structural view of the anti-retraction disk of the present invention;

Fig. 11 is a schematic diagram of the assembly and explosion of the wedge-shaped slider group of the present invention;

Fig. 12 is a cross-sectional view of the wedge slider group of the present invention;

Fig. 13 is a perspective view of the tie rod screw and the retaining spring of the present invention.

In the figure: 1. Hydraulic cylinder connecting screw; 2. Cylinder head flange; 3. Anti-loosening screw; 4. Backstop plate; 5. Compression cylinder assembly; 6. First screw; 7. Compression hydraulic cylinder ; 8, the second screw; 9, the third screw; 10, the piston; 11, the cylinder head; 12, the piston rod; 13, the pull rod screw; 14, the compression spring; 15, the first wedge-shaped slider group; 16, the plug ; 17, the second wedge-shaped slider group; 18, circlip; 19, hydraulic cylinder oil inlet; 20, pressure plate; 21, anti-loosening screw hole; 22, operation hole; One O-ring; 26, the second O-ring; 27, the valve assembly plug; 28, the left wedge slider; 29, the right wedge slider; 30, the third O-ring; 32, the high-pressure pump liquid cylinder; 33, slideway.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-13, the present invention provides a technical solution: a quick disassembly valve cover, including a cylinder cover flange 2 and a compression cylinder assembly 5, and the outer surface of the compression cylinder assembly 5 It is threadedly connected with the upper half of the inner surface of the cylinder head flange 2, and the outside of the compression cylinder assembly 5 and located on the top of the cylinder head flange 2 is fixedly connected with the anti-retraction disc 4 through the first screw 6, and the anti-retraction disc 4 The outer gland of the cylinder head is on the top of the cylinder head flange 2, several semi-conical holes 23 are evenly opened on the outer side of the anti-retraction plate 4, and the top of the cylinder head flange 2 is provided with anti-loosening screw holes 21, and the anti-retraction plate 4 The anti-loosening screw 3 threaded through one of the semi-tapered holes 23 and the anti-loosening screw hole 21 can be fixed on the top of the cylinder head flange 2 .

The compression cylinder assembly 5 mainly includes a compression hydraulic cylinder 7, a second screw 8, a third screw 9, a piston 10, a cylinder head 11, a piston rod 12, a first O-ring 25, a second O-ring 26 and The third O-ring 30, the center of the top of the compression hydraulic cylinder 7 is provided with a hydraulic cylinder oil inlet 19, the cylinder head 11 is connected to the bottom of the compression hydraulic cylinder 7, and the first O-ring 25 is sleeved on the outside of the cylinder head 11, The piston 10 is slidably connected inside the compression hydraulic cylinder 7, and the second O-ring 26 is sleeved on the side of the piston 10, and the top end of the piston rod 12 is fixedly connected to the bottom of the piston 10 by the third screw 9 embedded, and the third The O-ring 30 is arranged inside the embedded groove at the bottom of the piston 10 , and the second screw 8 passes through the compression hydraulic cylinder 7 and is compressed on the top of the cylinder head 11 .

The bottom of the piston rod 12 is fixedly connected with a pressure plate 20, the bottom of the cylinder head 11 and the top of the pressure plate 20 and the side of the piston rod 12 are provided with a slideway 33, and the bottom surface of the slideway 20 at the top of the pressure plate 20 is an inclined plane; The group slideways 33 are all intersected with two rows, and the inside of the two rows of slideways 33 are respectively provided with the first wedge-shaped slider group 15 and the second wedge-shaped slider group 17; the first wedge-shaped slider group 15 and the second wedge-shaped slider group Block group 17 is all made up of left wedge-shaped slide block 28, right wedge-shaped slide block 29, tie rod screw 13, jumper spring 18 and plug 16, and the left end of tie-bar screw 13 is threadedly connected with left wedge-shaped slide block 28 inner surfaces, jumper spring 18 and The plug 16 is respectively sleeved on the outside of the right end of the pull rod screw 13 from left to right, and the right wedge-shaped slider 29 is sleeved on the outside of the pull rod screw 13 and is threadedly connected with the outer surface of the plug 16; both ends of the pull rod screw 13 are sleeved with a compression spring 14 , and the two ends of the two compression springs 14 respectively abut the left wedge-shaped slider 28 and the inner surface of the compression hydraulic cylinder 7 and the right wedge-shaped slider 29 and the inner surface of the compression hydraulic cylinder 7 .

There is an operation hole 22 on the side of the cylinder head flange 2, and the cylinder head flange 2 is fixedly connected to the top of the high-pressure pump liquid cylinder 32 through several liquid cylinder connecting screws 1, and the center of the top of the high-pressure pump liquid cylinder 32 is crimped with a valve assembly plug 27, and the pressure plate 20 is pressed against the top of the plug 27 of the valve assembly.

At the same time, the content not described in detail in this specification belongs to the prior art known to those skilled in the art.

Specifically follow the steps below to install:

Step 1. Installation of the cylinder head flange 2: Install the cylinder head flange 2 on the high-pressure pump liquid cylinder 32 through the hydraulic cylinder connecting screw 1, and then install the valve assembly plug 27. After the cylinder head flange 2 is installed, it can be As a part of the high-pressure pump cylinder 32, there is no need to disassemble it later;

Step 2. Install the compression cylinder assembly 5 and the stop disc 4 according to the following steps:

1. Install a third O-ring 30 in the sealing groove of the inner hole of the cylinder head 11, then install the cylinder head 11 on the outer cylinder on the upper part of the piston rod 12, and then install another third O-ring 30 Installed in the sealing groove of the inner hole of the piston 10, and at the same time install the above-mentioned piston rod 12 in the inner hole of the piston 10, and install and fix the piston rod 12 and the piston 10 together with the third screw 9;

2. Installation of hydraulic cylinder and piston 10: first install one piece of first O-ring 25 and two pieces of second O-ring 26 in the sealing groove of the outer circle of the cylinder head 11 and the outer circle of the piston 10 respectively, and then install the left and right The wedge-shaped slider is installed in the slideway between the above-mentioned installed cylinder cover 11 and the piston rod 12, and then the above-mentioned installed piston rod 12 and cylinder cover 11 are installed in the inner hole of the compression hydraulic cylinder 7, and at the same time Correspond the screw holes of the left and right wedge-shaped sliders to the operating hole 22 at the lower part of the compression hydraulic cylinder 7, and finally tighten the cylinder head 11 and the compression hydraulic cylinder 7 with the second screw 8;

3. Installation of the first wedge-shaped slider group 15 and the second wedge-shaped slider group 17: according to step 2, the left and right wedge-shaped sliders have been installed in the slideway 33 between the cylinder head 11 and the piston rod 12, and the left and right The screw hole of the wedge-shaped slider corresponds to the operating hole 22 at the lower part of the compression hydraulic cylinder 7. First, the plug 16 and the compression spring 14 correspond to the threaded holes of the two wedge-shaped sliders on the left and right, and then the circlip 18 is installed on the pull rod Screw 13 in the corresponding groove, then thread the tie rod screw 13 from the operation hole 22 outside the compression hydraulic cylinder 7 and pass through the plug 16 and compression spring 14 in this way, and finally screw the outer thread of the front end of the tie rod screw 13 Enter the left wedge-shaped slider 28 threaded holes, so that under the action of the compression springs 14 at both ends of each wedge-shaped slider group, the two groups of wedge-shaped slider groups can move in reverse at the same time in the slideway of the cylinder head 11, because the left and right wedge-shaped sliders The contact surface with the slideway 33 of the cylinder head 11 is a plane structure. In addition, since the slideway 33 of the cylinder head 11 is a plane structure, the left and right wedge-shaped sliders will not cause the left and right wedge-shaped sliders to slide in the slideway 33 of the cylinder head 11. The distance from the cylinder head 11 changes, and due to the wedge-shaped structure of the lower surface of the left and right wedge-shaped sliders and the slideway 33 of the piston rod 12, when the left and right wedge-shaped sliders slide inwardly in the slideway 33 of the piston rod 12, the piston will The rod 12 moves a certain distance downwards in its axial direction.

Step 3. Installation of the backstop disc 4: Install the backstop disc 4 on the upper end surface of the above-mentioned installed compaction cylinder assembly 5 through the first screw 6, and at the same time make the semi-tapered hole around the backstop disc 4 23 with a large half-arc end facing outward;

Step 4. Installation of the compression cylinder assembly 5: Install the installed compression cylinder assembly 5 with the anti-retraction plate 4 and the wedge-shaped slider group on the cylinder head flange 2 of the hydraulic cylinder through threads. In the threaded hole, the lower end surface of the piston rod 12 of the compression cylinder assembly 5 should be in contact with the upper top surface of the plug 27 of the valve assembly during installation, and at the same time, the tie rod screw 13 and the The operating hole 22 of the cylinder head flange 2 corresponds, and at this time, a semi-tapered hole 23 around the anti-retraction plate 4 also corresponds to the anti-loosening screw hole 21 on the cylinder head flange 2, and then the anti-loosening screw 3 is installed In the anti-loosening screw hole 21 on the cylinder head flange 2, the compression cone surface of the anti-loosening screw 3 will be in contact with the inner circle of the corresponding semi-tapered hole 23 on the anti-retraction disc 4 and along with the anti-loosening screw 3 is screwed and stuck tightly, and after the upper operation, the compression cylinder assembly 5 will not produce relative rotation in the cylinder head flange 2;

Step 5. Press the valve cover for quick disassembly: after the compression cylinder assembly 5 is installed on the hydraulic cylinder according to the above method, the oil inlet 19 of the hydraulic cylinder of the compression cylinder assembly 5 can be adjusted according to the requirements. When the pressure is pressed, the piston rod 12 of the compression cylinder assembly 5 will move downward and compress the valve assembly plug 27 below it, because the lower end surface of the piston rod 12 and the upper end surface of the valve assembly plug 27 before pressing has been in contact, so when the compression cylinder assembly 5 is pressed, the piston rod 12 moves down a small distance, and at this time, the pull rod screw is rotated through the operation hole 22 of the cylinder head flange 2 without pressure relief 13. Under the pulling force of the pull rod screw 13, the left and right wedge sliders of the two wedge slider groups move centripetally along the slideway 33 at the same time. At the same time, due to the wedge structure of the left and right wedge sliders and the wedge angle is much smaller than the friction angle of the contact material, Therefore, once the left and right wedge-shaped sliders are wedged in the wedge-shaped slideway 33 between the cylinder head 11 and the piston rod 12, the left and right wedge-shaped sliders will not slip outwards even under the effect of a large pressure or vibration. At this time, the pressure of the pressing hydraulic cylinder assembly 5 can be relieved. In addition, because a compression spring 14 is installed between each wedge-shaped slider and the pressing hydraulic cylinder 7, the wedge-shaped movement of the left and right wedge-shaped sliders will automatically move under the action of the spring thrust. The lock function will also be enhanced;

Step 5. Disassembly of the quick-disassembly bonnet: When the plug 27 of the valve assembly needs to be removed, press the hydraulic cylinder of the compression cylinder assembly 5 according to the required pressure. The pressure between the cover 11 and the piston rod 12 disappears, and then the rod screw 13 is reversely rotated through the operation hole 22 of the flange 2 of the cylinder head. Under the reverse thrust of the rod screw 13, the first wedge-shaped slider group 15 and the second The left and right wedge-shaped sliders of the wedge-shaped slider group 17 are centrifugally moved outward at the same time, and the lower slopes of the left and right wedge-shaped sliders are also separated from the slideway 33 slopes of the piston rod 12 of the compression cylinder assembly 5. After the compression cylinder assembly 5 is depressurized, there will be no extrusion force between the external thread of the compression cylinder assembly 5 and the internal thread of the cylinder head flange 2, and then the locking screw 3 can be easily removed. The compacting cylinder assembly 5 is conveniently disassembled.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (7)

1. The utility model provides a quick assembly disassembly's valve gap, includes cylinder cap flange 2 and compresses tightly hydraulic cylinder assembly 5, and compresses tightly the surface of hydraulic cylinder assembly 5 and the upper half of cylinder cap flange 2 internal surface and adopts threaded connection, its characterized in that: the outside of compressing tightly the hydraulic cylinder assembly 5 just is located the top of cylinder cap flange 2 and passes through first screw 6 fixedly connected with stopping dish 4, and stopping dish 4's outside gland at the top of cylinder cap flange 2, a plurality of half taper hole 23 have evenly been seted up in stopping dish 4's outside, locking screw hole 21 has been seted up at the top of cylinder cap flange 2, and stopping dish 4 accessible runs through one of them half taper hole 23 and locking screw hole 21 threaded connection's locking screw 3 fixes at the top of cylinder cap flange 2.

2. A quick release valve cover according to claim 1, wherein: the hydraulic cylinder assembly 5 mainly comprises a hydraulic cylinder 7, a second screw 8, a third screw 9, a piston 10, a cylinder cover 11, a piston rod 12, a first O-shaped ring 25, a second O-shaped ring 26 and a third O-shaped ring 30, a hydraulic cylinder oil inlet 19 is formed in the center of the top of the hydraulic cylinder 7, the cylinder cover 11 is in threaded connection with the bottom of the hydraulic cylinder 7, the first O-shaped ring 25 is sleeved outside the cylinder cover 11, the piston 10 is in sliding connection with the inside of the hydraulic cylinder 7, the second O-shaped ring 26 is sleeved on the outer circular surface of the piston 10, the top end of the piston rod 12 is fixedly connected with the bottom of the piston 10 in an embedded mode through the third screw 9, the third O-shaped ring 30 is arranged in an embedded groove in the bottom of the piston 10, and the second screw 8 penetrates through the hydraulic cylinder 7 and is pressed on the top of the cylinder cover 11.

3. A quick release valve cover according to claim 2, wherein: the bottom of the piston rod 12 is fixedly connected with a pressure plate 20, a slideway 33 is arranged between the bottom of the cylinder cover 11, the top of the pressure plate 20 and the side surface of the piston rod 12, and the bottom surface of the slideway 33 at the top of the pressure plate 20 is an inclined surface.

4. A quick release valve cover according to claim 3, wherein: the upper and lower slide ways 33 are respectively provided with two rows in a crossing manner, and the interiors of the two rows of slide ways 33 are respectively provided with a first wedge-shaped slide block group 15 and a second wedge-shaped slide block group 17.

5. The quick assembly disassembly valve cover as set forth in claim 4, wherein: the first wedge-shaped sliding block set 15 and the second wedge-shaped sliding block set 17 are composed of a left wedge-shaped sliding block 28, a right wedge-shaped sliding block 29, a pull rod screw 13, a clamp spring 18 and a plug 16, wherein the left end of the pull rod screw 13 is in threaded connection with the inner surface of the left wedge-shaped sliding block 28, the clamp spring 18 and the plug 16 are sleeved outside the right end of the pull rod screw 13 from left to right, and the right wedge-shaped sliding block 29 is sleeved outside the pull rod screw 13 and is in threaded connection with the outer surface of the plug 16.

6. The quick assembly disassembly valve cover of claim 5, wherein: compression springs 14 are sleeved at two ends of the pull rod screw 13, and two ends of the two compression springs 14 are respectively abutted against the inner surfaces of the left wedge-shaped sliding block 28 and the compression hydraulic cylinder 7, and the inner surfaces of the right wedge-shaped sliding block 29 and the compression hydraulic cylinder 7.

7. A quick release valve cover according to claim 1, wherein: the side of the cylinder cover flange 2 is provided with an operation hole 22, the cylinder cover flange 2 is fixedly connected to a high-pressure pump hydraulic cylinder 32 through a plurality of hydraulic cylinder connecting screws 1, the center of the top of the high-pressure pump hydraulic cylinder 32 is in compression joint with a valve assembly plug 27, and a pressure plate 20 is compressed on the top of the valve assembly plug 27.

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