Positive displacement piston pump

Abstract

The utility model relates to the technical field of piston pumps, in particular to a positive displacement piston pump which comprises a pump body, clamping sleeves are fixed to a water inlet pipe and a water outlet pipe of the pump body respectively, sliding sleeves are sleeved on the two clamping sleeves respectively, limiting pieces are arranged on the two sliding sleeves respectively, and the limiting pieces are arranged on the sliding sleeves respectively. The opposite side walls of the two sliding sleeves are each provided with a plurality of nut containing grooves arranged in an annular array, and magnets are fixed into the multiple nut containing grooves. The sliding sleeve is pushed to move towards the pump body, a gap is reserved between the sliding sleeve and a flange on the pump body, the nuts are placed in the nut containing grooves, the nuts can be conveniently placed in the nut containing grooves at a time, the magnets can prevent the nuts from being disengaged from the nut containing grooves, the sliding sleeve is pushed to move away from the pump body, and after the sliding sleeve is reset, the nuts can be conveniently placed in the nut containing grooves. During installation, the end of the bolt penetrates through the flange on the pipeline and the flange on the pump body, the bolt is tightened through a wrench, the nut containing groove is formed, the nut can be prevented from rotating in the bolt tightening process, and the installation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of piston pumps, in particular to a positive displacement piston pump. Background Art

[0002] A piston pump is a type of positive displacement pump that uses the reciprocating motion of the piston to periodically change the working volume of the pump chamber, thereby sucking in and out liquid. It consists of a pump cylinder, piston, inlet and outlet valves, inlet and outlet pipes, connecting rod, and transmission device. Power drives the piston to reciprocate within the pump cylinder. When connecting the flanges on the piston pump's inlet and outlet pipes to the flanges on the pipeline, the end of the bolt is generally passed through the flanges on the piston pump and the pipeline, a nut is placed on the bolt, and the nut is initially tightened by hand. Then, a wrench is used with one hand to secure the nut while the other hand operates the wrench to tighten the bolt. Because the flange has multiple through-holes for the bolts to pass through, this operation must be repeated multiple times to connect the pipeline flange to the flange on the piston pump. This entire process is rather cumbersome, and the pipeline connection efficiency is low. Therefore, a positive displacement piston pump has been proposed to improve efficiency. Utility Model Content

[0003] In view of the problems in the prior art, the utility model provides a positive displacement piston pump.

[0004] The technical solution adopted by the utility model to solve its technical problems is a volumetric piston pump, including a pump body, wherein a ferrule is fixed on the water inlet pipe and the discharge pipe of the pump body, a sliding sleeve is sleeved on the two ferrules, a limit piece is provided on the two sliding sleeves, and the side walls opposite to each other of the two sliding sleeves are provided with a plurality of nut placement grooves arranged in a circular array, and magnets are fixed in the plurality of nut placement grooves.

[0005] By adopting the above technical solution, the sleeve is pushed toward the pump body, leaving a gap between the sleeve and the flange on the pump body, and the nut is placed in the nut placement groove. Multiple nut placement grooves are convenient for placing the required nuts at one time. The magnet can prevent the nut from falling out of the nut placement groove, pushing the sleeve away from the pump body. After the sleeve is reset, the end of the bolt is passed through the flange on the pipe and the flange on the pump body and the bolt is tightened with a wrench. The setting of the nut placement groove can prevent the nut from rotating during the tightening of the bolt. There is no need to hold a wrench to fix the nut, which improves installation efficiency. After installation, the sleeve can shield and protect the nut.

[0006] Specifically, the limiting part includes an insert block and a shell, the shell is connected to the sliding sleeve, the insert block is provided in the shell, the clamping sleeve and the sliding sleeve are provided with slots adapted to the insert block, a pull rod is fixed on the side of the insert block away from the clamping sleeve, a spring is sleeved on the pull rod, and a through hole adapted to the pull rod is provided on the shell.

[0007] By adopting the above technical solution, the pull rod is pulled and the insert block is disengaged from the slot on the ferrule, which facilitates pushing the sliding sleeve. After the sliding sleeve is reset, the pull rod is released, and the spring pushes the insert block to reset. The insert block is inserted into the slot on the ferrule, and the insert block can prevent the sliding sleeve from sliding.

[0008] Specifically, a pull block is fixed to one end of the pull rod away from the inserting block.

[0009] By adopting the above technical solution, the pull rod can be easily pulled by holding the pull block.

[0010] Specifically, the outer walls of the two clamping sleeves are integrally formed with two protrusions, and the two sliding sleeves are provided with two sliding grooves adapted to the protrusions.

[0011] By adopting the above technical solution, when the sliding sleeve is pushed, the protrusion cooperates with the sliding groove in the sliding sleeve, which can prevent the sliding sleeve from rotating and causing the nut in the sliding sleeve and the through hole on the flange to be misaligned.

[0012] Specifically, two shifting blocks are fixed to the outer walls of the two sliding sleeves, and each of the shifting blocks is integrally formed with a plurality of anti-slip protrusions.

[0013] By adopting the above technical solution, the arrangement of the shift block and the anti-slip protrusion makes it convenient to push the sliding sleeve.

[0014] Beneficial effects of the utility model:

[0015] (1) The volumetric piston pump described in the present invention pushes the sleeve toward the pump body, leaving a gap between the sleeve and the flange on the pump body, and places the nut in the nut placement groove. Multiple nut placement grooves are convenient for placing the required nuts at one time. The magnet can prevent the nut from falling out of the nut placement groove, pushing the sleeve away from the pump body. After the sleeve is reset, the end of the bolt is passed through the flange on the pipe and the flange on the pump body and the bolt is tightened with a wrench. The setting of the nut placement groove can prevent the nut from rotating during the tightening of the bolt. There is no need to hold a wrench to fix the nut, which improves the installation efficiency. After installation, the sleeve can shield and protect the nut.

[0016] (2) The volumetric piston pump described in the present invention pulls the pull rod, and the insert block is disengaged from the slot on the ferrule, making it easier to push the sleeve. After the sleeve is reset, the pull rod is released, and the spring pushes the insert block to reset. The insert block is inserted into the slot on the ferrule, and the insert block can prevent the sleeve from sliding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 For the utility model Figure 1 A magnified view of the structure at center A;

[0020] Figure 3 This is a cross-sectional view of the combination of the clamping sleeve, the sliding sleeve and the limiting member of the utility model.

[0021] In the figure: 1. Pump body; 2. Clamping sleeve; 3. Sliding sleeve; 30. Dial block; 4. Positioning member; 40. Insert block; 41. Housing; 42. Pull rod; 43. Spring; 44. Pull block; 5. Magnet; 6. Bump. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] In order to improve the efficiency of pipeline connection, as an embodiment of the present utility model, Figure 1 、 Figure 2 、 Figure 3 As shown, the volumetric piston pump described in the present invention includes a pump body 1, and a ferrule 2 is welded and fixed on the water inlet pipe and the discharge pipe of the pump body 1, and a sliding sleeve 3 is sleeved on the two ferrules 2. A limiter 4 is provided on the two sliding sleeves 3, and the opposite side walls of the two sliding sleeves 3 are provided with a plurality of nut placement grooves arranged in a circular array, and magnets 5 are fixed in the plurality of nut placement grooves by adhesive.

[0024] When in use, push the sleeve 3 toward the pump body 1, leaving a gap between the sleeve 3 and the flange on the pump body 1, and place the nut in the nut placement groove. Multiple nut placement grooves are convenient for placing the required nuts at one time. The magnet 5 can prevent the nut from falling out of the nut placement groove, and push the sleeve 3 away from the pump body 1. After the sleeve 3 is reset, pass the end of the bolt through the flange on the pipe and the flange on the pump body 1 and tighten the bolt with a wrench. The setting of the nut placement groove can prevent the nut from rotating during the tightening of the bolt. There is no need to hold a wrench to fix the nut, which improves the installation efficiency. After installation, the sleeve 3 can shield and protect the nut.

[0025] In order to prevent the sliding sleeve 3 from sliding, for example, Figure 3 As shown, the limit member 4 includes an insert block 40 and a shell 41, the shell 41 is welded to the sleeve 3, an insert block 40 is provided in the shell 41, the clamping sleeve 2 and the sleeve 3 are provided with slots adapted to the insert block 40, a pull rod 42 is welded and fixed on the side of the insert block 40 away from the clamping sleeve 2, a spring 43 is sleeved on the pull rod 42, and a through hole adapted to the pull rod 42 is provided on the shell 41.

[0026] When in use, pull the pull rod 42, and the insert block 40 will be disengaged from the slot on the sleeve 2, making it easier to push the sleeve 3. After the sleeve 3 is reset, release the pull rod 42, and the spring 43 pushes the insert block 40 to reset. The insert block 40 is inserted into the slot on the sleeve 2, and the insert block 40 can prevent the sleeve 3 from sliding.

[0027] In order to facilitate pulling the pull rod 42, for example, Figure 3 As shown, a pull block 44 is welded and fixed to one end of the pull rod 42 away from the insert block 40 .

[0028] In order to prevent the rotation of the sleeve 3 from causing the nut and the through hole on the flange for the bolt to pass through to be misaligned, for example, Figure 2 As shown, the outer walls of the two clamping sleeves 2 are integrally formed with two protrusions 6 , and the two sliding sleeves 3 are provided with two sliding grooves adapted to the protrusions 6 .

[0029] In order to facilitate the pushing of the sliding sleeve 3, for example, Figure 2 As shown, two shifting blocks 30 are welded and fixed to the outer walls of the two sliding sleeves 3 , and each of the shifting blocks 30 is integrally formed with a plurality of anti-slip protrusions.

[0030] When the utility model is in use, the pull rod 42 is pulled, and the insert block 40 is disengaged from the slot on the ferrule 2, which facilitates pushing the sliding sleeve 3. A gap is left between the sliding sleeve 3 and the flange on the pump body 1, and the nut is placed in the nut placement groove. Multiple nut placement grooves are convenient for placing the required nuts at one time, and the magnet 5 can prevent the nut from falling out of the nut placement groove;

[0031] Push the sleeve 3 away from the pump body 1. After the sleeve 3 is reset, release the pull rod 42. The spring 43 pushes the insert block 40 to reset. The insert block 40 is inserted into the slot on the ferrule 2. The insert block 40 can prevent the sleeve 3 from sliding.

[0032] Just pass the end of the bolt through the flange on the pipe and the flange on the pump body 1 and tighten the bolt with a wrench. The setting of the nut placement groove can prevent the nut from rotating during the tightening of the bolt. There is no need to hold a wrench to fix the nut, which improves the installation efficiency. After installation, the sleeve 3 can cover and protect the nut.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions in the specification are only for the purpose of illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and improvements, and such changes and improvements fall within the scope of protection claimed by the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents. Any matters not described in detail in the present invention belong to the prior art known to those skilled in the art.

Claims

1. A positive displacement piston pump, characterized in that: The invention comprises a pump body (1), wherein a ferrule (2) is fixed on the water inlet pipe and the drain pipe of the pump body (1), a sliding sleeve (3) is sleeved on the two ferrules (2), a limiting member (4) is provided on the two sliding sleeves (3), and the side walls opposite to each other of the two sliding sleeves (3) are provided with a plurality of nut placement grooves arranged in an annular array, and magnets (5) are fixed in the plurality of nut placement grooves.

2. A positive displacement piston pump according to claim 1, characterized in that: The limiting member (4) includes an insert (40) and a shell (41), the shell (41) is connected to the sleeve (3), the insert (40) is provided in the shell (41), the clamping sleeve (2) and the sleeve (3) are both provided with slots adapted to the insert (40), a pull rod (42) is fixed on the side of the insert (40) away from the clamping sleeve (2), a spring (43) is sleeved on the pull rod (42), and a through hole adapted to the pull rod (42) is provided on the shell (41).

3. A positive displacement piston pump according to claim 2, characterized in that: A pull block (44) is fixed to one end of the pull rod (42) away from the inserting block (40).

4. A positive displacement piston pump according to claim 1, characterized in that: The outer walls of the two clamping sleeves (2) are integrally formed with two protrusions (6), and the two sliding sleeves (3) are provided with two sliding grooves adapted to the protrusions (6).

5. A positive displacement piston pump according to claim 1, characterized in that: Two shifting blocks (30) are fixed to the outer walls of the two sliding sleeves (3), and each shifting block (30) is integrally formed with a plurality of anti-slip protrusions.

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