Horizontal sludge plunger pump with sealing element convenient to replace

Abstract

The utility model discloses a horizontal sludge plunger pump convenient for replacing a sealing element, which is characterized in that when any one sludge barrel piston abuts against a corresponding connecting end cover, the other sludge barrel piston just completely extends out of the corresponding sludge barrel; an isolation sleeve which can be directly detached without removing the mud barrel or the piston rod is arranged between the mud barrel and the hydraulic cylinder; a sealing assembly is arranged in the isolation sleeve and comprises a mud barrel sealing sleeve detachably inserted into the connecting end cover and further comprises a hydraulic cylinder sealing sleeve detachably inserted into the end of the hydraulic cylinder. When the hydraulic cylinder piston abuts against any hydraulic cylinder sealing sleeve, the end, corresponding to the other hydraulic cylinder sealing sleeve, of the piston rod just moves to the position close to the hydraulic cylinder sealing sleeve, and the distance between the matched end face of the corresponding connecting end cover and the mud barrel sealing sleeve and the end face of the piston rod is larger than the length of the mud barrel sealing sleeve and the length of the hydraulic cylinder sealing sleeve. By means of the design, the mud barrel piston and the sealing piece of the sealing assembly can be replaced only by disassembling few parts.

Description

Technical Field

[0001] The utility model relates to the field of plunger pumps, in particular to a horizontal sludge plunger pump with convenient replacement of sealing parts. Background Art

[0002] In the sewage treatment process, the double-cylinder sludge plunger pump is a commonly used sludge dewatering machine feed pump. It can transport media with high viscosity and poor fluidity, has no shearing, stirring, turbulent pulsation phenomenon on the media, and has stable pumping. It is widely used in sludge dewatering machine feed pumps.

[0003] The double-cylinder sludge plunger pump mainly includes a hydraulic station and a pump body, wherein the pump body mainly includes a hydraulic cylinder, a pump barrel, an inlet and outlet, a feed pipe, a discharge pipe, a one-way valve, a piston rod, and a reversing mechanism. The piston rod is provided with a hydraulic cylinder piston and a pump barrel piston. A sealing assembly is provided between the hydraulic cylinder and the pump barrel. The sealing assembly includes a seal on the connecting end cover connecting the pump barrel and the hydraulic cylinder, and also includes a seal on the sealing sleeve at the end of the hydraulic cylinder.

[0004] Among them, the pump barrel piston, that is, the mud barrel piston, is located in the pump barrel, and is in direct contact with sewage for a long time. The sewage contains a lot of mud and other impurities, so it wears the fastest. It is necessary to replace the seal of the pump barrel piston regularly to ensure the pumping effect; the sealing assembly between the hydraulic cylinder and the pump barrel is in high temperature and high pressure conditions for a long time and is in contact with sewage, so it is also very easy to be damaged; the existing replacement method is: first disassemble the relevant parts connected to the corresponding pump barrel; then remove the corresponding pump barrel and move it out to expose the pump barrel piston inside it; finally, replace the pump barrel piston seal; on this basis, remove the pump barrel piston, then remove the connecting end cover connecting the pump barrel and the hydraulic cylinder, and remove the sealing sleeve at the end of the hydraulic cylinder, then the sealing assembly can be replaced; the above replacement method requires disassembly of a large number of related parts, which is time-consuming, labor-intensive and inconvenient. Utility Model Content

[0005] The utility model aims to provide a horizontal sludge plunger pump which is convenient for replacing a mud bucket piston seal and a seal assembly between a hydraulic cylinder and a pump bucket.

[0006] The purpose of the utility model is achieved as follows: a horizontal sludge plunger pump with convenient replacement of sealing parts comprises a hydraulic cylinder, a mud bucket and a piston rod; the piston rod is provided with a hydraulic cylinder piston and a mud bucket piston; the mud bucket comprises a barrel body, a connecting end cover detachably arranged at the inner side end of the barrel body, and an outer end cover detachably arranged at the outer side end of the barrel body; the outer end cover is not provided with an inlet and outlet; when any one of the mud bucket pistons abuts against its corresponding connecting end cover, the other mud bucket piston just completely extends out of its corresponding mud bucket; the mud bucket and the hydraulic cylinder are connected with each other. An isolation sleeve is provided in the spacer that can be directly disassembled without removing the mud bucket or the piston rod; a sealing assembly is provided in the isolation sleeve, and the sealing assembly includes a mud bucket sealing sleeve detachably inserted on the connecting end cover, and also includes a hydraulic cylinder sealing sleeve detachably inserted on the end of the hydraulic cylinder; when the hydraulic cylinder piston abuts against any one of the hydraulic cylinder sealing sleeves, the end of the piston rod corresponding to the other hydraulic cylinder sealing sleeve just moves to the vicinity of the hydraulic cylinder sealing sleeve, and the distance between the matching end face of the corresponding connecting end cover and the mud bucket sealing sleeve and the end face of the piston rod is greater than the length of the mud bucket sealing sleeve and the hydraulic cylinder sealing sleeve.

[0007] Compared with the prior art, the utility model has the beneficial effect that: the sludge plunger pump provided by the utility model can replace the corresponding seals by simply removing the outer end cover, the mud bucket piston and the isolation sleeve, and the related parts that need to be removed are fewer and smaller, so that the seals of the mud bucket piston and the sealing assembly are more convenient to replace;

[0008] Specifically, by adjusting the length ratio of the piston rod, hydraulic cylinder, mud bucket, isolation sleeve, hydraulic cylinder piston, mud bucket piston, mud bucket sealing sleeve, and hydraulic cylinder sealing sleeve, when any mud bucket piston abuts against its corresponding connecting end cover, the other mud bucket piston just completely extends out of its corresponding mud bucket, so there is no need to remove the mud bucket additionally, and the mud bucket piston seal can be replaced, which simplifies the operation; the outer end cover of the mud bucket is not provided with an inlet and outlet port, so it is actually only necessary to remove the outer end cover, and there is no need to remove the corresponding inlet and outlet port connected to the outer end cover, which simplifies the operation;

[0009] By adjusting the above-mentioned length ratio relationship, when the hydraulic cylinder piston abuts against any hydraulic cylinder sealing sleeve, the piston rod end corresponding to the other hydraulic cylinder sealing sleeve just moves to the vicinity of the hydraulic cylinder sealing sleeve, and the distance B between the matching end face of the corresponding connecting end cover and the mud bucket sealing sleeve and the end face of the piston rod is greater than the length of the mud bucket sealing sleeve and the hydraulic cylinder sealing sleeve. Therefore, it is only necessary to remove the outer end cover, mud bucket piston, and isolation sleeve, and the seal of the sealing assembly can be replaced without additionally removing the mud bucket.

[0010] As a preferred solution of the utility model, the isolation sleeve comprises two symmetrical upper and lower covers, the outer periphery of the upper and lower covers near the mud bucket are provided with a first mounting groove, the upper and lower covers near the mud bucket are provided with a plurality of centrally symmetrically distributed through holes, and the connecting end cover is provided with a plurality of threaded holes corresponding thereto; the upper and lower covers near the hydraulic cylinder are provided with a plurality of centrally symmetrically distributed threaded holes, and the end of the hydraulic cylinder is provided with a plurality of through holes corresponding thereto; the joint between the upper and lower covers is provided with a plurality of second mounting grooves, the second mounting grooves are provided with through holes, and the joint between the lower and upper covers is provided with a plurality of threaded holes corresponding to the through holes; fixing screws are installed in the through holes and the corresponding threaded holes. The isolation sleeve designed in this way has a simple structure and is easy to disassemble and assemble.

[0011] Furthermore, the hydraulic cylinder sealing sleeve and the mud bucket sealing sleeve are both provided with flanges, the flanges are both provided with a number of through holes symmetrically distributed in the center, the connecting end cover and the end of the hydraulic cylinder are both provided with a number of threaded holes corresponding to the through holes; fixing screws are installed in the through holes and the corresponding threaded holes. The sealing sleeve designed in this way is reliably fixed and easy to disassemble and assemble.

[0012] Furthermore, the lower cover is provided with a liquid outlet hole connected to the interior of the isolation sleeve, so that the operator can find out whether the sealing assembly is leaking or not in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the matching relationship among the hydraulic cylinder, mud bucket, isolation sleeve and piston rod of the utility model, wherein the piston rod is in a normal working position.

[0014] Figure 2 It is a schematic diagram of the matching relationship among the hydraulic cylinder, mud bucket, isolation sleeve and piston rod of the utility model, wherein the piston rod is in the position for replacing the mud bucket piston seal.

[0015] Figure 3 It is a schematic diagram of the matching relationship among the hydraulic cylinder, mud bucket, isolation sleeve and piston rod of the utility model, wherein the piston rod is in the position for replacing the seal on the sealing assembly.

[0016] Figure 4 for Figure 3 A local enlarged schematic diagram of point A in the middle.

[0017] Figure 5 It is a schematic diagram of the main structure of the isolation sleeve of the utility model.

[0018] Figure 6 It is a schematic diagram of the cross-sectional structure of the isolation sleeve of the utility model.

[0019] Among them, 1 hydraulic cylinder, 2 mud bucket, 3 barrel body, 3a inlet and outlet, 4 connecting end cover, 5 outer end cover, 6 piston rod, 6a hydraulic cylinder piston, 6b mud bucket piston, 7 isolation sleeve, 7a upper cover, 7b lower cover, 7c first installation groove, 7d second installation groove, 8 mud bucket sealing sleeve, 9 hydraulic cylinder sealing sleeve, 10 threaded hole, 11 through hole, 12 fixing screws, 13 flange. DETAILED DESCRIPTION

[0020] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0021] Combined with Figure 1-6 As shown, a horizontal sludge plunger pump with convenient seal replacement includes a hydraulic cylinder 1, a mud bucket 2, and a piston rod 6; the piston rod 6 is provided with a hydraulic cylinder piston 6a and a mud bucket piston 6b; the mud bucket 2 includes a barrel body 3, and also includes a connecting end cover 4 detachably arranged at the inner end of the barrel body 3, and also includes an outer end cover 5 detachably arranged at the outer end of the barrel body 3; the outer end cover 5 is not provided with an inlet and outlet 3a; when any one of the mud bucket pistons 6b abuts against its corresponding connecting end cover 4, the other mud bucket piston 6b just completely extends out of its corresponding mud bucket 2; there is no gap between the mud bucket 2 and the hydraulic cylinder 1. An isolation sleeve 7 that can be directly removed if the mud bucket 2 or the piston rod 6 needs to be removed; a sealing assembly is arranged inside the isolation sleeve 7, and the sealing assembly includes a mud bucket sealing sleeve 8 that is detachably inserted on the connecting end cover 4, and also includes a hydraulic cylinder sealing sleeve 9 that is detachably inserted on the end of the hydraulic cylinder 1; when the hydraulic cylinder piston 6a abuts against any one of the hydraulic cylinder sealing sleeves 9, the end of the piston rod 6 corresponding to the other hydraulic cylinder sealing sleeve 8 just moves to the vicinity of the hydraulic cylinder sealing sleeve 9, and the distance B between the matching end face of the corresponding connecting end cover 4 and the mud bucket sealing sleeve 6b and the end face of the piston rod 6 is greater than the length of the mud bucket sealing sleeve 8 and the hydraulic cylinder sealing sleeve 9;

[0022] It should be noted that the outer circumference and inner side of the mud bucket sealing sleeve 8 are provided with a plurality of sealing members, the outer circumference of which is sealed and connected to the connecting end cover 4, and the inner side of which is slidably and sealedly connected to the piston rod 6; the outer circumference and inner side of the hydraulic cylinder sealing sleeve 9 are provided with a plurality of sealing members, the outer circumference of which is sealed and connected to the end of the hydraulic cylinder 1, and the inner side of which is slidably and sealedly connected to the piston rod 6;

[0023] The plunger pump of the utility model can be either a double-cylinder single-feed sludge pump or a double-cylinder double-feed sludge pump, which mainly depends on the number of groups of inlet and outlet ports 3a on the sludge barrel 2;

[0024] In the prior art, a support frame is provided below the mud bucket 2 and the hydraulic cylinder 1, so the isolation sleeve 7 can be directly removed, and the position of the mud bucket 2 or the hydraulic cylinder 1 will not change due to the removal of the isolation sleeve 7;

[0025] The distance B between the mating end surface connecting the end cover 4 and the mud bucket sealing sleeve 6b and the end surface of the piston rod 6 is greater than the length of the mud bucket sealing sleeve 8 and the hydraulic cylinder sealing sleeve 9, so as to facilitate the removal of the disassembled mud bucket sealing sleeve 8 and the hydraulic cylinder sealing sleeve 9 from this gap.

[0026] The isolation sleeve 7 comprises two symmetrical upper covers 7a and lower covers 7b, the outer peripheries of the upper covers 7a and the lower covers 7b are provided with a first mounting groove 7c at one end close to the mud bucket 2, the upper covers 7a and the lower covers 7b are provided with a plurality of centrally symmetrically distributed through holes 11 at one end close to the mud bucket 2, and the connecting end cover 4 is provided with a plurality of threaded holes 10 corresponding thereto; the upper covers 7a and the lower covers 7b are provided with a plurality of centrally symmetrically distributed threaded holes 10 at one end close to the hydraulic cylinder 1, and the end of the hydraulic cylinder 1 is provided with a plurality of through holes 11 corresponding thereto; the joint between the upper cover 7a and the lower cover 7b is provided with a plurality of second mounting grooves 7d, the second mounting grooves 7d are provided with a through hole 11, and the joint between the lower cover 7b and the upper cover 7a is provided with a plurality of threaded holes 10 corresponding to the through hole 11; fixing screws 12 are installed in the through holes 11 and the corresponding threaded holes 10;

[0027] It should be noted that the width of the first mounting groove 7c needs to be greater than the length of the fixing screw 12, so that the fixing screw 12 can be placed in the first mounting groove 7c and inserted into the corresponding through hole 11 and threaded hole 10;

[0028] When disassembling the isolation sleeve 7, first remove all the fixing screws 12 in the second mounting groove 7d to release the connection between the upper cover 7a and the lower cover 7b; then, remove the fixing screws 12 at both ends of the upper cover 7a to remove the upper cover 7a; finally, remove the fixing screws 12 at both ends of the lower cover 7b to remove the lower cover 7b.

[0029] The hydraulic cylinder sealing sleeve 9 and the mud bucket sealing sleeve 8 are both provided with flanges 13, and the flanges 13 are both provided with a plurality of through holes 11 distributed symmetrically with respect to the center. The connecting end cover 4 and the end of the hydraulic cylinder 1 are both provided with a plurality of threaded holes 10 corresponding to the through holes 11; fixing screws 12 are installed in the through holes 11 and the corresponding threaded holes 10;

[0030] It should be noted that the hydraulic cylinder sealing sleeve 9 and the mud bucket sealing sleeve 8 are connected and fixed from the inner side of the isolation sleeve 7 to the connection end cover 5 and the end of the hydraulic cylinder 1. This design facilitates the removal of the hydraulic cylinder sealing sleeve 9 and the mud bucket sealing sleeve 8 directly from the position where the isolation sleeve 7 is located after the isolation sleeve 7 is removed.

[0031] When disassembling the hydraulic cylinder sealing sleeve 9 or the mud bucket sealing sleeve 8, first insert all the fixing screws 12 on the flange 13; then use tools to knock appropriately to increase the matching clearance of the farad plate 13; finally, use a flat-blade screwdriver to gradually pry out the corresponding sealing sleeve along the matching clearance of the flange 13 until the corresponding sealing sleeve can be completely removed.

[0032] The above-mentioned lower cover 7b is provided with a liquid outlet hole connected to the interior of the isolation sleeve 7; it should be noted that when the seal of the sealing assembly is damaged, the oil in the hydraulic cylinder 1 or the sewage in the mud bucket 2 will penetrate into the isolation sleeve 7 and then flow out from the liquid outlet hole on the lower cover 7b. Therefore, once liquid is found to flow out of the liquid outlet hole, it means that the seal of the sealing assembly is damaged and needs to be replaced.

[0033] When the seal of the mud bucket piston needs to be replaced, first remove the outer end cover 5 of the corresponding mud bucket 2; then the hydraulic cylinder 1 acts on the hydraulic cylinder piston 6a to drive the piston rod 6 to move, thereby driving the mud bucket piston 6b whose seal needs to be repaired and replaced to move outward, and when the mud bucket piston 6b at the other end abuts against its corresponding connecting end cover 4, the mud bucket piston 6b whose seal needs to be repaired and replaced just extends completely out of the mud bucket 2, and the seal on the mud bucket piston 6b can be repaired and replaced at this time;

[0034] When the seal of the sealing assembly needs to be replaced, first remove all the outer end covers 5 of the two mud buckets 2; then remove the mud bucket piston 6b on the side where the seal of the sealing assembly needs to be replaced, that is, make the corresponding mud bucket piston 6b completely extend from the mud bucket 2 through the action of the hydraulic cylinder 1, and then remove the mud bucket piston 6b; then remove the corresponding isolation sleeve 7; then, turn off the hydraulic station of the hydraulic cylinder 1 and relieve the pressure of the hydraulic cylinder 1; then, slowly push the piston rod 6 to move in the opposite direction with the help of a traction device until the hydraulic cylinder piston 6a abuts against the corresponding hydraulic cylinder sealing sleeve 9, at which time the end of the piston rod 6 just moves to the vicinity of the corresponding hydraulic cylinder sealing sleeve 9; finally, remove the corresponding sealing assembly, that is, the hydraulic cylinder sealing sleeve 9 and the mud bucket sealing sleeve 8, and replace the seal;

[0035] It should be noted that, for the existing sludge pump reversing mechanism, the specific structure of the reversing mechanism can refer to the utility model patent with authorization announcement number CN 209294014 U. In order to ensure that the piston rod 6 can move over a large range, when the piston rod 6 is moved, the corresponding sensor, i.e., the proximity switch, needs to be turned off in advance;

[0036] The traction device may be a forklift. To facilitate the pushing of the forklift, a special push rod may be fixed on the fork of the forklift. The push rod head is provided with a groove that can cooperate with the end of the piston rod 6.

[0037] The present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present utility model, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.

Claims

1. A horizontal sludge plunger pump with convenient seal replacement, comprising a hydraulic cylinder (1), a mud bucket (2), and a piston rod (6); the piston rod (6) is provided with a hydraulic cylinder piston (6a) and a mud bucket piston (6b); the characteristics are: The mud bucket (2) comprises a barrel body (3), a connecting end cover (4) detachably arranged at the inner end of the barrel body (3), and an outer end cover (5) detachably arranged at the outer end of the barrel body (3); the outer end cover (5) is not provided with a material inlet and outlet (3a); When any one of the mud bucket pistons (6b) abuts against its corresponding connection end cover (4), the other mud bucket piston (6b) just completely extends out of its corresponding mud bucket (2); An isolation sleeve (7) is provided between the mud bucket (2) and the hydraulic cylinder (1), which can be directly disassembled without removing the mud bucket (2) or the piston rod (6); a sealing assembly is provided in the isolation sleeve (7), and the sealing assembly includes a mud bucket sealing sleeve (8) detachably inserted on the connecting end cover (4), and also includes a hydraulic cylinder sealing sleeve (9) detachably inserted on the end of the hydraulic cylinder (1); When the hydraulic cylinder piston (6a) abuts against any one of the hydraulic cylinder sealing sleeves (9), the end of the piston rod (6) corresponding to the other hydraulic cylinder sealing sleeve (9) just moves to the vicinity of the hydraulic cylinder sealing sleeve (9), and the distance B between the matching end face of the corresponding connecting end cover (4) and the mud bucket sealing sleeve (8) and the end face of the piston rod (6) is greater than the length of the mud bucket sealing sleeve (8) and the hydraulic cylinder sealing sleeve (9).

2. A horizontal sludge plunger pump with convenient seal replacement according to claim 1, characterized in that: The isolation sleeve (7) comprises two symmetrical upper covers (7a) and lower covers (7b); the outer circumference of the upper cover (7a) and the lower cover (7b) are provided with a first mounting groove (7c) at one end close to the mud bucket (2); the upper cover (7a) and the lower cover (7b) are provided with a plurality of centrally symmetrically distributed through holes (11) at one end close to the mud bucket (2); the connecting end cover (4) is provided with a plurality of threaded holes (10) corresponding thereto; the upper cover (7a) and the lower cover (7b) are provided with a plurality of centrally symmetrically distributed threaded holes (10) at one end close to the hydraulic cylinder (1); and the end of the hydraulic cylinder (1) is provided with a plurality of centrally symmetrically distributed through holes (11); A plurality of second mounting grooves (7d) are provided at the joint between the upper cover (7a) and the lower cover (7b), a through hole (11) is provided in the second mounting groove (7d), and a plurality of threaded holes (10) corresponding to the through holes (11) are provided at the joint between the lower cover (7b) and the upper cover (7a); A fixing screw (12) is installed in the through hole (11) and the corresponding threaded hole (10).

3. A horizontal sludge plunger pump with convenient seal replacement according to claim 1 or 2, characterized in that: The hydraulic cylinder sealing sleeve (9) and the mud bucket sealing sleeve (8) are both provided with a flange (13), and the flange (13) is provided with a plurality of through holes (11) distributed symmetrically with respect to the center, and the connecting end cover (4) and the end of the hydraulic cylinder (1) are both provided with a plurality of threaded holes (10) corresponding to the through holes (11); A fixing screw (12) is installed in the through hole (11) and the corresponding threaded hole (10).

4. A horizontal sludge plunger pump with convenient seal replacement according to claim 2, characterized in that: The lower cover (7b) is provided with a liquid outlet hole which is connected to the interior of the isolation sleeve (7).

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